2011
الضغط النفسي واستراتيجيات مواجهته
La revue : مجلة الحكمة
Domaine : علم النفس الاكلينيكي
Mots Clés : الضغط النفسي الحالي، الضغط النفسي المت
Auteur : بن مصمودي علي
Issn : Eissn : vol : , Num : 07, pp : 74-81
Résume :

اهم الاستراتيجيات التي يستخدمها الفرد لمواجهة الضغوط النفسية

2013
التربية الجنسية بين فقه الضرورة ومحاذير الااثارة
La revue : مجلة الحكمة للدراسات الفلسفية
Domaine : علم النفس النمو
Mots Clés : البلوغ، مداخل تدريس التربية الجنسية،
Auteur : بن مصمودي علي
Issn : 2009-5129 Eissn : vol : , Num : 16, pp : 181-190
Résume :

كيف يمكن ان ندرس التربية الجنسية بدون اثارة الغرائز بحيث يتم ذلك بصورة علمية

2018
An epidemic of plagiarism strikes our Universities The current threat and the delayed treatment: A literature review analysis
La revue : JIL MAGAZINE
Domaine : SCHOOL PSYCHOLOGY
Mots Clés : Plagiarism, online plagiarism, offline plagiarism, self plagiarism, cheating in exams
Auteur : BENMESMOUDI AALI
Issn : 2311-5181 Eissn : vol : , Num : 48, pp : 139-147
Résume :

In this paper we clarify the phenomenon of plagiarism which threatens the credibility of both the examination and the learning process

2018
Cheating in exams in Algerian school- Common causes and effective solutions
La revue : JIL MAGAZINE
Domaine : SCHOOL PSYCHOLOGY
Mots Clés : examinations, cheating
Auteur : BENMESMOUDI AALI
Issn : 2311-5181 Eissn : vol : , Num : 39, pp : 139-147
Résume :

this article is about a phenomenon which threatens the integrity of the educational evaluation, mainly the national examinations, such as Baccalaureate and BEM

2018
A new FCA-based method for identifying biclusters in gene expression data
La revue : International Journal of Machine Learning and Cybernetics
Domaine : Informatique
Mots Clés : Biclustering · Formal concept analysis · Data mining · Bioinformatics · DNA microarray data · Bond correlation measure
Auteur : Amina Houari, Wassim Ayadi, Sadok Ben Yahia
Issn : 1868-8071 Eissn : vol : 9, Num : 11, pp : 1879-1893
Résume :

Biclustering has been very relevant within the field of gene expression data analysis. In fact, its main thrust stands in its ability to identify groups of genes that behave in the same way under a subset of samples (conditions). However, the pioneering algorithms of the literature has shown some limits in terms of the quality of unveiled biclusters. In this paper, we introduce a new algorithm, called BiFCA+, for biclustering microarray data. BiFCA+ heavily relies on the mathematical background of the formal concept analysis, in order to extract the set of biclusters. In addition, the Bond correlation measure is of use to filter out the overlapping biclusters. The extensive experiments, carried out on real-life datasets, shed light on BiFCA+’s ability to identify statistically and biologically significant biclusters.

2017
Mining Negative Correlation Biclusters from Gene Expression Data using Generic Association Rules
La revue : Procedia Computer Science
Domaine : Informatique
Mots Clés : Biclustering; Negative correlations; Generic Association Rules ; Data mining; Bioinformatic; DNA microarray data.
Auteur : Amina Houari, Wassim Ayadi, Sadok Ben Yahia
Issn : 1877-0509 Eissn : vol : 112, Num : , pp : 278-287
Résume :

A majority of existing biclustering algorithms for microarrays data focus only on extracting biclusters with positive correlations of genes. Nevertheless, biological studies show that a group of biologically significant genes may exhibit negative correlations. In this paper, we propose a new biclustering algorithm, called NBic-ARM. Based on Generic Association Rules, our algorithm identifies negatively-correlated genes. To assess NBic-ARM’s performance, we carried out exhaustive experiments on three real-life datasets. Our results prove NBic-ARM’s ability to identify statistically and biologically significant biclusters.

2014
Synthesis of Novel Highly Functionalized 4-Thiazolidinone Derivatives from 4-Phenyl-3-thiosemicarbazones
La revue : MOLEDULES MDPI
Domaine : chimie organique
Mots Clés : 4-phenyl-3-thiosemicarbazones, thiazolidinones
Auteur : Abdelmadjid. Benmohammed, Omar. Khoumeri, Ayada. Djafri, Thierry. Terme, Patrice. Vanelle
Issn : 1420-3049 Eissn : vol : 19, Num : 3, pp : 3068–3083
Page web de l'auteur

2016
Backstepping approach for autonomous mobile robot trajectory tracking
La revue : Indonesian Journal of Electrical Engineering and Computer Science
Domaine : Contrôle
Mots Clés : Non-linear systems; Trajectory tracking; Dynamic model; backstepping
Auteur : Ibari Benaoumeur, Benchikh Laredj, Hanifi Elhachimi Amar Reda, Ahmed-foitih Zoubir
Issn : Eissn : vol : 2, Num : 3, pp : 478-485
Résume :

This paper proposes a backstepping controller design for trajectory tracking of unicycle-type mobile robots. The main object of the control algorithms developed is to design a robust output tracking controller. The design of the controller is based on the lyapunov theorem, kinematic tracking controller of an unicycle-like mobile robot is used to provides the desired values of the linear and angular velocities for the given trajectory. A Lyapunov-based stability analysis is presented to guarantee the robot stability of the tracking errors. Simulation and experimental results show the effectiveness of the proposed robust controller in term of accuracy and stability under different load conditions.

-0001
2019
La revue : مجلة دراسات إنسانية واجتماعية
Domaine : فلسفة
Mots Clés : الدين، الفلسفة، التطور، المنهج، فلسفة الدين
Auteur :
Issn : 2253-0592 Eissn : vol : 11, Num : 08/01, pp : 155-166
Résume :

نحاول في موضوعنا طرح تحليل فلسفي لتطور العلاقة بين مجالين مهمين من حياة البشر، ألا وهما الدين والفلسفة، حيث نطمح إلى فهم التغير الحاصل في النظر إلى مفهوم وموضوع وغاية الدين عبر تاريخ الفكر الفلسفي، لفهم طبيعة الوثبة الحاصلة من فلسفات دينية إلى فلسفة في الدين وإشكال مقالنا ينطلق من وجود نقلة نوعية عرفها الفكر الفلسفي حول الدين من فلسفات دينية مجالها التسليم أو الاعتقاد ثم التعقل إلى فلسفة في الدين تتأسس على الانتقاد و التعقل دون حدود وقيود مواكبة مستجدات الواقع والعلم

2019
An integrated hardware/software in Algeria Telecom access layers NGN model:MA5600T and C300M Shelfs MSAN’s solutions
La revue : PHOTONICS LETTERS OF POLAND
Domaine : Telecommunications Optiques
Mots Clés : MSAN, AX MA5600T, C300M, NGN
Auteur : Samir Ghouali,Mohammed Feham, Rachid Merzougui
Issn : 2080-2242 Eissn : vol : 11, Num : 02, pp : 32-34
Résume :

The evolution of an existing network to the new structure will require a phased migration strategy aimed at minimising capital expenditure during the transition phase, while reaping the benefits early on. Any action taken during this transition step should simplify the network's evolution to the NGN packet-switched architecture. This paper presents the development of PSTN networks into NGN Optical Fiber, its configuration and implementation of Smart AX MA5600T HUAWEI and C300M ZTE Shelfs MSANs solutions.

2018
Agriculture gross production value – arable land – active population in agricultural sector and energy consumption causality in 76 countries: A dynamic panel data approach
La revue : New Trends and Issues Proceedings on Humanities and Social Sciences
Domaine : Agriculture et l'Energetique
Mots Clés : Agriculture gross production value, arable land, active population, energy consumption, panel co - integration, panel Granger causality.
Auteur : Mohammed Seghir Guellil, Mostefa Belmokaddem, Samir Ghouali
Issn : 2547 - 8818 Eissn : vol : 04, Num : 10, pp : 406-416
Résume :

The overall goal of this paper is to investigate the long run and casual relationship between agriculture gross production value (AGPV), arable land (AL), total economically active population in agricultural sector (APA) and total primary energy consumption in the agricultural sector given the historical trend of the se variables. For a panel of 76 countries during the period 1991–2012, the paper’s three main findings are that: (i)Neutrality hypothesis is adopted because there is no causality between AL and AGPV.; (ii) APA-led AGPV; (iii) Feedback hypothesis indicates that there are four cases of bidirectional causality between the rest of the variables. Adaptation measures are recommended for both authorities and farmers to ensure food security, such as providing incentives for farmers to adopt more recent technologies, which consumes less energy, land reclamation, steer more employees towards the agricultural sector.

2017
An Investigation of Analytic Decision During Driving
La revue : International Journal of Advanced Computer Science and Applications
Domaine : ST
Mots Clés : Panel Co-integration, Panel Granger Causality, FMOLS and DOLS Estimators, Cardiorespiratory electromyography galvanic signals
Auteur : Samir Ghouali, Yassine Zakarya Ghouali, Mohammed Feham
Issn : 2156-5570 Eissn : vol : 08, Num : 02, pp : 156-165
Résume :

To examine the long-term causality between Cardiorespiratory Electromyography Galvanic signals for 17 drivers taken from Stress Recognition in Automobile Drivers database. Methods: Two statistical methods, co-integration to reveal an eventual existence of a long-term relationship between ECG (Electrocardiograph),EMG (electromyography, GSR (galvanic skin resistance),heart rate (HR) and respiration,well as the Application of the model of Granger causality. Results: ECG shows certain dependence to EMG,GSR, heart rate and respiration.The results for ECG dependent suggest that an increase of 1% in EMG, FOOTGSR, HAND GSR, HR and RESPIRATION implies a variation of ECG which take a value respectively of 0.016248%, 0.007241%, 0.028366%, 0.000511% and 0.000110% in the within dimension based on the FMOLS(Fully Modified Ordinary Least Squares).With same way, the result for ECG suggest that an increase of 1% in EMG, FOOT GSR, HAND GSR, HR and RESPIRATION implies a variation of ECG which take a value respectively,of 0.065684%, 0.014534%, 0.032800%, 0.000304%, 0.005986% in the between dimension based on the same method. The results of panel Granger causality show a bi-directional relationship between ECG and FOOT GSR, HAND GSR and respiration signals, it must be noted as a unidirectional causality from EMG to ECG. Conclusion:This study shows the long-term interaction between the bio signals, and reveal how the understanding of these interactions can help the doctors to understand the risks that may exist between these interactions. The main advantage of a multidimensional and multivariate model is to solve a multitude of problems that prevent doctors to treat the patients better and is not the case for studies in two dimensions.

2016
The Granger Causality Effect between Cardiorespiratory Hemodynamic Signals
La revue : Springer International Publishing Switzerland 2016, Forging Connections between Computational Mathematics and Computational Geometry, Springer Proceedings in Mathematics & Statistics 124, DOI 10.5176/2251-1911_CMCGS14.50_23
Domaine : Mathematics, Statistics and Biomedical
Mots Clés : Direction of information, Cardiorespiratory hemodynamic signals, Granger causality, Multivariate study, (MGH/MF) waveform database
Auteur : Samir Ghouali, Mohammed Feham, Yassine Zakarya Ghouali
Issn : 2194-1009 Eissn : vol : , Num : , pp : 275-300
Résume :

Granger causality (GC) is one of the most popular measures to reveal causality influence of time series based on the estimated linear regression model and has been widely applied in economics and neuroscience due to its reliability, clarity, and robustness. Granger causality has recently received increasing attention to study causal interactions of neurophysiological data; in this chapter we have developed a model of causality between the respiratory, hemodynamic, and cardiac signals, more specifically, a study based on the Granger causality between three ECG leads, blood pressure, central venous pressure, pulmonary arterial pressure, respiratory impedance, and airway CO2. We selected 187 patients of 250 for our study, taken from Montreal General Hospital/MF (Massachusetts General Hospital/Marquette Foundation) databases. These signals are ideal for understanding causality and coupling (unidirectional or bidirectional). In this approach we aim to analyze and understand the interactions between the signals mentioned above, and identify the significance of this interaction. The originality of this chapter is the number of variables selected for the study. Unlike the majority of studies that are conducted only with two variables, our study is multidimensional. The main advantage of a multidimensional and multivariable model is to solve a myriad of problems which is not the case in the two-dimensional studies.

2014
Revealing the Dynamic Correlation between Cardiac and Respiratory Hemodynamic Signals Using Time-Dependent Panel Co-Integration Analysis
La revue : International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering
Domaine : Mathematics
Mots Clés : Panel Co-integration, Panel Granger Causality, Cardiorespiratory Hemodynamic signals, Multivariate study, (MGH / MF) waveform database
Auteur : Samir Ghouali, Mohammed Feham, Yassine Zakarya Ghouali
Issn : 2320 –3765 Eissn : vol : 03, Num : 11, pp : 13470-13483
Résume :

In this article, we conducted an investigation using very powerful mathematical model to verify if a long-term relationship exists between Cardiorespiratory hemodynamic signals, the methodology we applied in this paper is mainly based on four basic parts, in first part we applied unit root tests to assess the stationarity of series, the second step is to apply the test of Co-integration model and quantify this long-term relationship. Finally we applied the Granger causality tests to the entire panel that consists of 186 patients taken from Montreal Hospital/General MF (Massachusetts General Hospital/Marquette Foundation) database. The results found in this study show the long-term interaction between the Cardiorespiratory hemodynamic signals, and reveals how the understanding of these interactions can help the doctors to understand the risks that may exist between these interactions.

2014
The Direction of Information between Cardiorespiratory Hemodynamic Signals: Test Analysis using Granger Causality
La revue : Journal of Mathematics, Statistics and Operations Research (JMSOR)
Domaine : Mathematics
Mots Clés : Cardiorespiratory Hemodynamic signals; Direction of information; Granger Causality; Multivariate study; (MGH / MF) waveform database
Auteur : Samir Ghouali, Mohammed Feham, Yassine Zakarya Ghouali
Issn : 2251-3388 Eissn : vol : 02, Num : 02, pp : 57-66
Résume :

2016
Energy based 3D autopilot for VTOL UAV under guidance & navigation constraints
La revue : Journal of Intelligent & Robotic Systems, Springer Netherlands
Domaine : Robotique
Mots Clés : Reference model IDA-PBC Autonomous UAV Internal energy Tracking control
Auteur : Yasser Bouzid, Houria Siguerdidjane, Yasmina Bestaoui, M Zareb
Issn : 0921-0296 Eissn : vol : 87, Num : 2, pp : 341-362
Résume :

Motion control design plays a crucial role in autonomous vehicles. Mainly, these systems operate in conditions of under-actuation, which make the control a serious task especially in presence of practical constraints. The main objective within this paper is to ensure the tracking of 3D reference trajectory overcoming some of the issues related to the control of multi-rotor vehicles (such as underactuation, robustness, limited power, accuracy, overshoot, etc.). Therefore, a control scheme for Vertical Take Off and Landing (VTOL) multi-rotor Unmanned Aerial Vehicle (UAV) is designed, applying the Interconnection and Damping Assignment-Passivity Based Control (IDA-PBC) technique. As reference model based technique, the control specifications are readily met by fixing a desired dynamic model, which is a major advantage of the technique. Moreover, a port −controlled Hamiltonian representation is exploited in order to point out the physical properties of the system such as its internal energy. This latter is exploited, as a fitness function for an optimization algorithm, in order to decrease the consumed energy especially at the take-off step and allows the tuning of the controller parameters. The numerical simulations have shown satisfactory results that support the claims using a nominal system model or disturbed model. The designed controller has been implemented on a real vehicle for which one demonstrates, in an indoor area manipulation, the effectiveness of the proposed control strategy.

2019
Evolutionary Autopilot Design Approach for UAV Quadrotor by Using GA
La revue : Iranian Journal of Science and Technology, Transactions of Electrical Engineerin, Springer Link
Domaine : Control
Mots Clés : Mini-UAV Fuzzy control Autopilot Genetic algorithms
Auteur : M. Zareb, W. Nouibat, Y. Bestaoui, R. Ayad, Y. Bouzid
Issn : 2228-6179 Eissn : 2364-1827 vol : , Num : , pp : 1-29
Résume :

This paper presents an off-line design strategy of an intelligent 3D autopilot of Micro-UAV Quadrotor. It consists of hybridization between two fuzzy controllers for the x and y motions and four PID classical controllers for the attitude/altitude motions. Genetic algorithms are used to adapt and optimize the value of the six controllers' parameters to achieve the best performance and decrease the consumed energy. Also, in order to ensure the global optimum control parameters, genetic algorithm named Bi-GA is used to automatically configure the two GAs using for the tuning process. This design strategy can be used to different types of Quadrotor (with cross or X configuration). Initially, in order to get the controller parameters, simulation tests are made on a commercial Quadrotor named AR.Drone V2. Finally, these parameters values are tested in an experiment using the robot operating system. The results of these experimentations confirm the effectiveness of using genetic algorithms in the design of intelligent PID autopilot.

2019
Full control of quadrotor aerial robot using fractional-order FOPID
La revue : Iranian Journal of Science and Technology, Transactions of Electrical Engineering
Domaine : Control
Mots Clés : VTOL-UAV Fractional-order control Attitude control Modified Black–Nichols FOPID Quadrotor
Auteur : Redouane Ayad, Wahid Nouibat, Mehdi Zareb, Yasmina Bestaoui Sebanne
Issn : 2228-6179 Eissn : 2364-1827 vol : 43, Num : 1, pp : 349-360
Résume :

This article presents a new design of fractional order ???????????? ???????? , for the full control of quadrotor (attitude and position)using a modified Black–Nichols method. First, we use single-input–single-output approach to design fractional-order ???????????? ???????? controllers for each position and attitude component. After that, we employ the same ???????????? ???????? controllers in the multiple-input–multiple-output model of quadrotor to test their performance. It is shown that we can improve the robustness and performance of the control significantly. Fractional-order modeling and control toolbox is used with Simulink model of quadrotor to prove and validate the performance of our controllers considering several scenarios.

2014
"Contribution à la spatialisation de l'évapotranspiration d'un agro-système semi-aride en Algérie par utilisation de la télédétection et du modèle METRIC".
La revue : Physio-Géo - Géographie Physique et Environnement
Domaine :
Mots Clés : évapotranspiration, bilan d'énergie, télédétection, Lansdat, METRIC, Algérie
Auteur : Hamimed, A., Nehal, L., Khaldi, A., & Azzaz, H
Issn : Eissn : vol : 8, Num : , pp : 197-213
Résume :

L'évapotranspiration est une composante majeure du bilan hydrologique, car elle exprime les échanges de masse et d'énergie entre le système sol-eau-végétation et l'atmosphère. Sa connaissance précise est indispensable dans plusieurs applications environnementales, telles que la climatologie, l'hydrologie et l'agronomie. La télédétection est un outil incontournable pour l'évaluation de l'évapotranspiration, à la fois dans l'espace et dans le temps. Dans cette contribution, le modèle de spatialisation METRIC (Mapping EvapoTranspiration at high Resolution with Internalized Calibration) est appliqué pour l'estimation de l'évapotranspiration d'un agro-système semi-aride situé dans la plaine du Sersou en Algérie. Deux images du satellite Landsat 7 acquises le 13 mars 2012 et le 30 avril 2012 ont été utilisées. Le modèle METRIC se base sur la résolution de l'équation du bilan d'énergie à la surface, où l'évapotranspiration est estimée comme le terme résiduel lorsque le rayonnement net, le flux de chaleur sensible et le flux de chaleur du sol sont connus. Différents indices d'alimentation en eau de surface dérivés de l'évapotranspiration ont été ensuite calculés : la fraction d'évapotranspiration de référence, le paramètre de PRIESTLEY-TAYLOR et la résistance de surface à l'évaporation. Ces indices permettent le diagnostic quantitatif de l'état hydrique du pixel. Les résultats obtenus concernent la validation du modèle utilisé pour l'analyse de la distribution spatiale de l'évapotranspiration et des flux énergétiques de surface. En conclusion, les résultats montrent que le modèle peut être considéré comme une approche prometteuse de spatialisation de l'évapotranspiration dans le cas des régions où les informations de terrain sont rares ou difficiles à collecter.

2017
Evapotranspiration and Surface Energy Fluxes Estimation Using the Landsat-7 Enhanced Thematic Mapper Plus Image over a Semiarid Agrosystem in the North-West of Algeria
La revue : Revista Brasileira de Meteorologia
Domaine : Télédétection
Mots Clés : evapotranspiration, remote sensing, METRIC, energy balance, Landsat
Auteur : Nehal Laounia, Hamimed Abderrahmane, Khaldi Abdelkader, Souidi Zahira, Zaagane Mansour
Issn : 0102-7786 Eissn : 1982-4351 vol : 32, Num : 4, pp : 691-702
Résume :

Monitoring evapotranspiration and surface energy fluxes over a range of spatial and temporal scales is crucial for many agroenvironmental applications. Different remote sensing based energy balance models have been developed, to estimate evapotranspiration at both field and regional scales. In this contribution, METRIC (Mapping EvapoTranspiration at high Resolution with Internalized Calibration), has been applied for the estimation of actual evapotranspiration in the Ghriss plain in Mascara (western Algeria), a semiarid region with heterogeneous surface conditions. Four images acquired during 2001 and 2002 by the Landsat-7 satellite were used. The METRIC model followed an energy balance approach, where evapotranspiration is estimated as the residual term when net radiation, sensible and soil heat fluxes are known. Different moisture indicators derived from the evapotranspiration were then calculated: reference evapotranspiration fraction, Priestley-Taylor parameter and surface resistance to evaporation. The evaluation of evapotranspiration and surface energy fluxes are accurate enough for the spatial variations of evapotranspiration rather satisfactory than sophisticated models without having to introduce an important number of parameters in input with difficult accessibility in routine. In conclusion, the results suggest that METRIC can be considered as an operational approach to predict actual evapotranspiration from agricultural areas having limited amount of ground information.

2013
Hydraulic features of flow through emergent bending aquatic vegetation in the riparian zone.
La revue : Water
Domaine : Hydrodynamique
Mots Clés : riparian zone; flexible aquatic vegetation; ecohydraulics; Manning coefficient n; vertical velocity; turbulence
Auteur : Jihong Xia, Launia Nehal
Issn : 2073-4441 Eissn : vol : 5, Num : 4, pp : 2080-2093
Résume :

Vegetation in riparian zones has a significant influence on resistance, velocity distribution and turbulence intensity. This study experimentally investigated the effect of emergent bending riparian zone vegetation on the flow. The results showed that the frond and stem parts of Acorus calami had different influences on hydraulic features and that the relative depth ratio of water depth h to stem height hs was a key determinant of those influences. Manning coefficient n varied greatly with the variation of vegetation densities, relative depth ratio of water depth h to stem height hs, Re and Fr. Manning coefficient n increased with increasing vegetation density, particularly in cases when h/hs > 1. The velocity distributions did not follow logarithmic profiles, but they instead exhibited double logarithmic profiles. In addition, vegetation characteristics were shown to influence the height of maximum velocity. The position of maximum velocity is further away from the bed in cases with denser vegetation distribution. Finally, turbulence intensity showed more significant variation in the stem part and peaked near the middle of the stem, at z/hs = 0.5, where z was the distance from the bottom.

2014
Development of a GIS-Based Decision Support System for Diagnosis of River System Health and Restoration
La revue : Water
Domaine : GIS
Mots Clés : decision support system (DSS); diagnosis; geographic information systems (GIS); river health
Auteur : Jihong Xia, Lihuai Lin, Junqiang Lin, Laounia Nehal
Issn : 2073-4441 Eissn : vol : 6, Num : , pp : 3136-3151
Résume :

The development of a decision support system (DSS) to inform policy making has been progressing rapidly. This paper presents a generic framework and the development steps of a decision tool prototype of geographic information systems (GIS)-based decision support system of river health diagnosis (RHD-DSS). This system integrates data, calculation models, and human knowledge of river health status assessment, causal factors diagnosis, and restoration decision making to assist decision makers during river restoration and management in Zhejiang Province, China. Our RHD-DSS is composed of four main elements: the graphical user interface (GUI), the database, the model base, and the knowledge base. It has five functional components: the input module, the database management, the diagnostic indicators management, the assessment and diagnosis, and the visual result module. The system design is illustrated with particular emphasis on the development of the database, model schemas, diagnosis and analytical processing techniques, and map management design. Finally, the application of the prototype RHD-DSS is presented and implemented for Xinjiangtang River ofHaining County in Zhejiang Province, China. This case study is used to demonstrate the advantages gained by the application of this system. We conclude that there is great potential for using the RHD-DSS to systematically manage river basins in order to effectively mitigate environmental issues. The proposed approach will provide river managers and designers with improved insight into river degradation conditions, thereby strengthening the assessment process and the administration of human activities in river management.

2016
Sinuosity-Driven Water Pressure Distribution on Slope of Slightly-Curved Riparian Zone: Analytical Solution Based on Small-disturbance Theory and Comparison to Experiments
La revue : Water
Domaine :
Mots Clés : riparian zone; slightly-curved; water pressure distribution; small-disturbance theory
Auteur : Jihong Xia, Genting Yu, Junqiang Lin, Weijie Cao, Zihan Yi, Lihuai Lin, Laounia Nehal
Issn : Eissn : vol : 8, Num : 2, pp : 61
Résume :

A curved riparian zone can create highly complex flow patterns that have a great effect on erosion, pollutant transport, surface water-groundwater exchange and habitat qualities. The small-disturbance theory has been applied to derive the analytical solutions of pressure distributions along a sinusoidal riverbank. Experiments have also been performed to test the hydrodynamic and geomorphic effects on pressure distribution and to verify the applicability of the derived expressions. The derived expressions were simple, accurate and agreed remarkably well with experimental results for the riparian banks with a low degree of curvature. On the contrary, when a riparian bank had a high degree of curvature, these expressions applying the approach of small-disturbance, could not effectively estimate the pressure distributions for a complex bank boundary or complex flow conditions. Moreover, sensitive analysis has indicated that the disturbed pressures along the riparian banks increased with increasing Froude number Fr, as well as the ratio of bank amplitude to wavelength a/. However, a/ has been found to have more significant influence on pressure variation in subcritical flow.

2005
Study of the flow through non-submerged vegetation
La revue : Journal of Hydrodynamics
Domaine : Open channel flow
Mots Clés : open channel flow , nonsubmerged vegetation , vegetation density , flow resistance , velocity distribution
Auteur : NEHAL Laounia , YAN Zhong min , XIA Ji hong
Issn : 1001-6058 Eissn : vol : 17, Num : 4, pp : 498-502
Résume :

Vegetation is an important feature of many rivers. Vegetation along rivers produces high resistance to flow and, as a result, has a large impact on water levels in rivers and lakes. The effects of instream-unsubmerged vegetation (such as the reed-similar Kalmus) on flow resistance and velocity distributions is studied in the paper. Artificial vegetation is used in the experimental study to simulate the Acorus Calmus L. As shown in experimental tests the resistance depends strongly on vegetation density and the Manning resistance coefficient varies with the depth of flow. A simplified model based on concepts of drag is developed to evaluate the roughness coefficient (Manning's n) for nonsubmerged vegetation. In vegetated channels the overall flow resistance is influenced significantly by the distribution pattern of the vegetated beds. Within vegetation, vertical variation in velocity is different from that in the nonvegetated bed, which reflects the variation in vegetation density. Vertical turbulent transport of momentum is negligible as demonstrated by experiments.

2018
USE OF HIGH SPATIAL RESOLUTION SATELLITE DATA FOR MONITORING AND CHARACTERIZATION OF DROUGHT CONDI-TIONS IN THE NORTHWESTERN ALGERIA
La revue : Mining Science
Domaine : Télédétection
Mots Clés : drought, Northwestern Algeria, SPI, NDVI, linear regression, satellite imagery
Auteur : Malika ABBES, Abderrahmane HAMIMED, Aicha LAFRID, Habib MAHI, Laounia NEHAL
Issn : 0370-0798 Eissn : vol : 25, Num : , pp : 85–113
Résume :

Over the last decades, Algeria has witnessed intense and persistent drought periods characterized by a significant rainfall deficit. The Northwestern Algeria, such as the most south Mediterranean regions, is marked by alternating wet and dry periods and mixing between Atlantic and Mediterranean airs. In a climate context increasingly disturbed by anthropogenic activities, it is essential to analyze the dry episodes at spatial and temporal scales. In order to understand this problem, this work aims to use the potential of Landsat satellite imagery for monitoring drought conditions in the Cheliff watershed in the northwestern Algeria. As known, the behavior of vegetation is strongly related to climate changes. On this basis, a comparison of the variations in the standardized normalized difference vegetation index (NDVI) and those of the drought indices calculated from meteorological data was implemented. In fact, the rainfall series from fifty meteorological stations were analyzed. The standardized precipitation index (SPI) was calculated for the years 1987, 2000, 2006, 2011 and 2015, corresponding to the acquisition dates of Landsat images. Similarly, an extraction of the NDVI values was performed for each meteorological station. The linear regression between SPI and NDVI showed a good correlation. Thus, the obtained results enabled establishing a new drought index based essentially on satellite data. This index represents the advantage for monitoring spatially the drought phenomena and can solve the problem of climatic data lack.

2018
Mapping and monitoring soil erosion in a watershed in western Algeria. Arabian Journal of Geosciences
La revue : Arabian Journal of Geosciences
Domaine :
Mots Clés : Erosion . GIS . Remote sensing . USLE . Fergougwatershed . North-Western Algeria
Auteur : Djazia Bouderbala, Zahira Souidi, Frédéric Donze, Mohamed Chikhaoui, Laounia Nehal
Issn : Eissn : vol : 11, Num : 23, pp : 744
Résume :

Fergoug watershed is subject to severe water erosion and land degradation that threaten agricultural sustainability for local populations. Soil loss and degradation by water erosion were estimated using the universal soil loss equation (USLE). The spatial distribution of soil losses was determined using the following parameters: the erosivity factor (R), obtained using climatic data from 12 local stations over a period of 41 years; the land cover factor (C), obtained using LandSat-TM satellite imagery 7 and 8; the erodibility factor (K), estimated from soil particle size analyses; and the topographic factor (LS), obtained from a digital terrain model. The Fergoug watershed is characterized by complex topography, and the topographic factor reached a value of 14.29. The erodibility factor K ranged from 0.08 to 0.38, and high values were recorded for about 20% of the watershed. The rainfall erosivity factor R ranged between 212.32 and 146.73 from east to west. The plant cover factor varied inter- and intraannually from 2.24 in May 2000 to 0.06 in May 2015. As a result, soil losses varied from 0.35 to 617.66 tons per hectare per year (t/ha/year) in a rainy year, and from 0.27 to 1188.92 t/ha/year in a dry year. The combined effects of the slope angle and the vegetation cover were shown to play a major role in soil losses in this area.

2014
Using the Priestley-taylor expression for estimating actual evapotranspiration and monitoring water stress from satellite Landsat ETM + data". Larhyss journal
La revue : Larhyss journal
Domaine :
Mots Clés : Remote sensing, triangle concept, energy balance, evapotranspiration, vegetation index, surface temperature, Priestley-Taylor
Auteur : Hamimed, A., Benslimane, M., Khaldi, A., Nehal, L., Zaagane, M
Issn : Eissn : vol : , Num : 18, pp : 179-195
Résume :

The quantification of evapotranspiration from irrigated areas is important for agriculture water management, especially in arid and semi-arid regions where water deficiency is becoming a major constraint in economic welfare and sustainable development. Conventional methods that use point measurements to estimate evapotranspiration are representative only of local areas and cannot be extended to large areas because of landscape heterogeneity. Remote sensing-based energy balance models are presently most suited for estimating evapotranspiration at both field and regional scales. In this study, we aim to develop a methodology based on the triangle concept, allowing estimation of evapotranspiration through the classical equation of Priestley and Taylor (1972) where the proportional coefficient α in this equation is ranged using a linear interpolation between surface temperature and Normalized Difference Vegetation Index (NDVI) values. Preliminary results using remotely sensed data sets from Landsat ETM+ over the Habra Plains in west Algeria are in good agreement with ground measurements. The proposed approach appears to be more reliable and easily applicable for operational estimation of evapotranspiration over large areas.

2013
Contribution to the study of the flow resistance in a flume with artificial emergent vegetation
La revue : Larhyss journal
Domaine :
Mots Clés : emergent vegetation, density, Manning resistance coefficient, Drag
Auteur : Hamimed, A., Nehal, L., Benslimane, M., Khaldi, A
Issn : 1112-3680 Eissn : vol : , Num : 15, pp : 55-63
Résume :

Vegetation growing in the water along rivers has been the subject of several studies since it was recognized that it could have a significant impact on the water flow. It may increases resistance to flow and causes higher water levels. Also, it has affects on the turbulent structure such as the mean velocity profiles. For flow of water through emergent vegetation, previous investigations show different results. Hence, better knowledge on its impact on flow conditions is needed. The purpose of this paper is to investigate, how density and placement of emergent vegetation influence flow resistance, water depth and velocity profile. Experiments using artificial vegetation selected to simulate emergent vegetation were carried out in a laboratory flume instead of natural channel, and Manning’s n is used to denote the resistance coefficient. The results show large variations in the Manning resistance coefficient with depth of flow and vegetative density. Vegetation causes resistance to flow; it reduces flow velocities and increases water depth. For the vegetation densities considered, the presence of foliage significantly reduces the mean velocities. Also mean velocity profile is set by the vertical structure of the vegetative drag.

2017
Argumentation et polyphonie dans le discours de presse. Cas du Quotidien d’Oran
La revue : Revue Algérienne des Sciences du Langage
Domaine : analyse du discours
Mots Clés : polyphonie, discours de presse, locuteur, énonciateur, point de vue.
Auteur : Mazot A.
Issn : 2507-721X Eissn : vol : 2, Num : 1, pp : 79-86
Résume :

Notre étude s’inscrit dans le cadre de la théorie de polyphonie linguistique. Notre corpus est composé d’un ensemble d’énoncés tirés du Quotidien d’Oran. Nous nous attachons à analyser quelques marques de polyphonie permettant au journaliste d’introduire d’une façon explicite ou implicite une ou plusieurs voix dans son discours, tout en véhiculant des points de vue et en exprimant des attitudes envers son énoncé et les voix qu’il met en scène. Nous nous inspirons des travaux menés par Oswald Ducrot (1980/1984) et Jean Claude Anscombre (1983) qui relèvent essentiellement de la linguistique de l’énonciation, de la théorie de l’argumentation dans la langue et de la théorie de polyphonie linguistique.

2016
Etude linguistique des marques de polyphonie dans le discours de presse : cas du Quotidien d’Oran
La revue : Cahier de Langue et de Littérature
Domaine : analyse du discours
Mots Clés : polyphonie, discours de presse, locuteur, énonciateur, point de vue.
Auteur : Mazot A.
Issn : 1112-4245 Eissn : vol : 2, Num : 9, pp : 95-113
Résume :

Notre étude s’inscrit dans le cadre de la théorie de polyphonie linguistique. Notre corpus est composé d’un ensemble d’articles tirés du Quotidien d’Oran. Nous nous attachons à analyser quelques marques de polyphonie permettant au journaliste d’introduire d’une façon explicite ou implicite une ou plusieurs voix dans son discours, tout en véhiculant des points de vue et en exprimant des attitudes envers son énoncé et les voix qu’il met en scène. Nous nous inspirons des travaux menés par Oswald Ducrot et Jean Claude Anscombre qui relèvent essentiellement de la linguistique de l’énonciation, de la théorie de l’argumentation dans la langue et de la théorie de polyphonie linguistique.

2017
De la voix de l’Autre dans le discours de presse. Analyse linguistique de polyphonie dans les articles du Quotidien d’Oran
La revue : LAROS
Domaine : analyse du discours
Mots Clés : polyphonie, discours de presse, locuteur, énonciateur, point de vue.
Auteur : Mazot A.
Issn : Eissn : vol : , Num : 14, pp : 391-401
Page web de l'auteur

2018
Hybrid Query Expansion Model for Text and Microblog Information Retrieval
La revue : Information Retrieval Journal Inf Retrieval J
Domaine : Information retrieval
Mots Clés : Information Retrieval; Query Expansion; Microblog Information Retrieval; Tweets Search; Explicit Semantic Analysis; Tweet Contextualization; TREC 2011; INEX 2014; WIKIPEDIA; DBPEDIA; Association Rules.
Auteur : Meriem Amina Zingla, Chiraz Latiri, Philippe Mulhem, Catherine Berrut, Yahya Slimani.
Issn : Eissn : vol : 21, Num : 4, pp : 337-367
Page web de l'auteur

-0001
Short Query Expansion for Microblog Retrieval
La revue : Procedia Computer Science
Domaine : Information retrieval
Mots Clés : Short query expansion Microblog retrieval Wikipedia DBpedia TREC microblog
Auteur : Meriem Amina Zingla, Chiraz Latiri, Yahya Slimani
Issn : Eissn : vol : 96, Num : 1, pp : 225-234
Page web de l'auteur

-0001
Statistical and Semantic Approaches for Tweet Contextualization
La revue : Procedia Computer Science
Domaine : Information retrieval
Mots Clés : Tweet contextualization track Twitter Query expansion Wikipedia Association rules Informativeness evaluation.
Auteur : Meriem Amina Zingla, Chiraz Latiri, Yahya Slimani, Catherine Berrut
Issn : Eissn : vol : 60, Num : 1, pp : 498-507
Page web de l'auteur

-0001
"Audiovisual Translation in the Arab World, Subtitling movie: "Opium and the Stick", practical study. »
La revue :
Domaine :
Mots Clés :
Auteur :
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
INTEGRATION DES ACTIVITES THEATRALES DANS L’ENSEIGNEMENT/APPRENTISSAGE DU FLE
La revue : cahiers de langue et littérature
Domaine : didactique
Mots Clés : Pratiques théâtrales, théâtre, communication orale, compétence orale, enseignement/apprentissage du français.
Auteur : S.nawel, B.Aicha
Issn : 1112-4245 1112-4245 1112-4245 Eissn : vol : , Num : 10-11, pp : p. 331 - 344
Résume :

Cet article porte sur les pratiques théâtrales en classe de FLE. Il propose une réflexion sur la manière d’utiliser le théâtre comme outil pédagogique pour apprendre le FLE. IL s’agit d’une expérience menée avec mes étudiants de 1ère année LMD, du département de langue et littérature françaises de l’université de Mascara (Algérie). Nous voulons revenir ici sur une pratique différente,qui n’a pas été suffisamment exploitée par les enseignants et pratiquée par les étudiants en classe. Visant donc à leur faire prendre conscience de la réalité de la langue française telle qu’elle se parle, et développer chez eux l’expression orale, et encourager les enseignants à intégrer les activités théâtrales en classe sans objectif de monter une pièce théâtrale, mais de travailler l’oral de manière ludique.

2019
Joint channel estimation and data detection for OFDM based cooperative system
La revue : Telecommunication Systems
Domaine : Telecommunications
Mots Clés : Estimation
Auteur : Mokhtar Besseghier; Djebbar Ahmed Bouzidi; Zouggaret Abdelhak; Iyad Dayoub
Issn : 1018-4864 Eissn : 1572-9451 vol : , Num : , pp :
Résume :

Orthogonal frequency division multiplexing based cooperative system using Alamouti space–time block coding at relay node represents an alternative solution to achieve better connectivity and significant enhancement to the data rate in wireless fading channels. But, these advantages cannot be achieved without an efficient estimation of the channels which becomes more challenging for cooperative communications. This paper addresses the joint channel estimation and data detection for cooperative communication systems. Indeed, equispaced pilot symbols are used by maximum likelihood (ML) algorithm to derive channels estimator, and then equalizers are calculated and applied to improve receiver data detection. The main contribution of our work is the development of the ML estimator, the corresponding Cramer–Rao lower bound, mean square error, signal to interference plus noise ratio, outage probability, bit error probability and the use of simulations to demonstrate the superior performances of the proposed methods.

2019
Blind digital modulation classification for STBC-OFDM system in presence of CFO and channels estimation errors
La revue : IET Communications
Domaine : Telecommunications
Mots Clés : STBC-OFDM
Auteur : Brahim Dehri; Mokhtar Besseghier; Djebbar Ahmed Bouzidi; Iyad Dayoub
Issn : 1751-8628 Eissn : 1751-8636 vol : 13, Num : 17, pp : 2827 - 2833
Résume :

Here, the authors propose a robust blind digital modulation classification (BDMC) algorithm for space time block coding (STBC)-based MIMO-OFDM system in the presence of carrier frequency offset (CFO) and channel estimation errors. Previous papers published on the topic of modulation identification were limited to single-carrier systems operating over frequency-flat channels. The problem of joint channel and CFO estimation in conjunction with blind digital modulation classification for STBC-OFDM in frequency selective channel and in the presence of the impulsive noise has not been addressed before to the best of their knowledge. To cope with performance degradation of BDMC due to CFO and channels errors, they propose joint semi-blind CFO and channels estimation methods. Higher order statistics (HOS), used for feature extraction, are combined with pattern recognition methods to solve the modulation identification problem. The main contribution of their work is the development of estimators, the study of their impacts on the blind classification capability, and the use of simulations to demonstrate the superior performance of the proposed algorithms.

2015
New Design of Pilot Patterns for Joint Semi-Blind Estimation of CFO and Channel for OFDM Systems
La revue : AEU - International Journal of Electronics and Communications
Domaine : Telecommunications
Mots Clés : Joint Semi-Blind Estimation
Auteur : Mokhtar Besseghier; Djebbar Ahmed Bouzidi
Issn : 1434-8411 Eissn : 1434-8411 vol : 69, Num : 4, pp : 759-764
Résume :

The greatest threat to the OFDM system is the loss of orthogonality between subcarriers due to the carrier frequency offset (CFO) which results in significant performance degradation. In addition to this last problem was the effect of propagation over multipath fading channel. Hence, both the channel and the CFO need to be estimated and corrected at the receiver for subsequent symbol detection. A new joint semi-blind CFO and channel estimation method for OFDM systems operating in multipath fading channels is investigated in this paper. The proposed algorithms are based on virtual subcarriers (VSC) in one hand and on a new design of pilot patterns in OFDM blocks in other hand. We propose to use Newton-Raphson algorithm for the estimation of CFO that has a faster convergence and a lower complexity compared to similar estimators that not employed this algorithm. Finally, we derive the Modified Cramer-Rao bounds (MCRB) for semi-blind CFO and channel estimation to evaluate the performance bounds of the proposed methods for commonly encountered scenarios. The simulation results are given to verify the validity of the proposed methods.

2014
Adaptive Joint Semi-blind Estimation of CFO and Channel for OFDM Systems
La revue : Wireless Personal Communications
Domaine : Telecommunications
Mots Clés : Joint Semi-Blind Estimation
Auteur : Mokhtar Besseghier; Djebbar Ahmed Bouzidi; Iyad Dayoub
Issn : 0929-6212 Eissn : 1572-834X vol : 81, Num : 2, pp : 473-487
Résume :

The large number of subcarriers, used in OFDM systems, increases the sensivity to frequency offset which results from a Doppler shift, due to mobile movement, as well as from a mismatch between the carrier frequencies at the transmitter and receiver. The problem of channel estimation in a practical OFDM receiver that suffers from CFO has been addressed in this paper. We first derived the modified MUSIC based blind CFO estimator. Next, we propose new joint training-based and joint semi-blind CFO and channel estimation for OFDM systems. Whereas the training-based estimator only assumes knowledge of pilot tones, the semi-blind estimator assumes knowledge of the virtual subcarriers (VSCs). For both estimators we derive a maximum likelihood (ML) algorithm for block processing and LMS algorithm for adaptive processing. It is demonstrated that the CFO estimators are able to perform well with a very small number of OFDM blocks. The performance of our estimators was investigated by simulations.

-0001
Study of Two-Stage-Type Electrostatic Precipitator in Axisymmetric Configuration Applied to Finely Ground Lignocellulosic Materials
La revue : IEEE Transactions on Industry Applications
Domaine :
Mots Clés : Corona discharge; Electrostatic hazards; Electrostatic precipitators; Finely ground lignocellulosic materials; Particle collection efficiency; Triode-type electrodes.
Auteur :  Zouzou, Noureddine & Mayer-Laigle, Claire & Rouau, Xavier & Zouaghi, Ayyoub & Fouad, Kherbouche & Dascalescu,L
Issn : 0093-9994 Eissn : 1939-9367 vol : 55, Num : 3, pp : 3114 - 3121
Résume :

The main objective of this paper is to develop a novel two-stage-type electrostatic precipitator to collect finely ground lignocellulosic particles. To prevent the danger of explosion of such a powdery material, ion generation and particle charging processes are separated. Main results show that the particles can be highly charged in a two-coaxial-cylinders triode-type device, which also facilitates their collection. For instance, the collection efficiency reaches 92 % for particle size of about 0.3 μm, and exceeds 99% for particle size greater than 2 μm.

2016
Study of a new electrostatic precipitator with asymmetrical wire-to-cylinder configuration for cement particles collection
La revue : Journal of Electrostatics
Domaine : Elsevier
Mots Clés : Electrostatic precipitator Corona discharge High resistivity particles Asymmetrical geometry Collection efficiency
Auteur : F Kherbouche, Y Benmimoun, A Tilmatine, A Zouaghi, N Zouzou
Issn : 0304-3886 Eissn : vol : 83, Num : , pp : 7-15
Résume :

In this paper, a new electrostatic precipitator (ESP) with asymmetrical wire-to-cylinder configuration is investigated experimentally and numerically. The main objective is to evaluate the collection efficiency of high resistivity particles.The electrical measurements show that the corona discharge behavior is similar to that obtained in symmetrical wire-to-cylinder configuration. Results show that the collection efficiency can reach 95% in the case of negative corona discharge. In order to understand the particle trajectories inside the ESP, the experimental results are compared with numerical simulation by using a coupled model. Numerical results indicate that particles can be collected on the collecting electrode backside.

2016
Optimized Bends and Corporate 1x4 and 1x8 SIW Power Dividers Junctions Analysis for V Band Applications Using a Rigorous Finite Element Method
La revue : Arabian Journal for Science and Engineering
Domaine : telecommunications
Mots Clés : Substrate integrated waveguide (SIW) V-band Bend analysis Two dimensional finite element method (2D-FEM) CST Microwave Studio
Auteur : Fellah benzerga, Mehadji Abri, Hadjira ABRI Badaoui
Issn : 12 Eissn : 231 vol : 41, Num : 9, pp : pp 3335–3343
Résume :

In this paper, two classes of V-band substrate integrated waveguide (SIW) bends operating in V-band frequency in the range [58–63 GHz] for the 90∘90∘ SIW bend with inductive via and in the range [57–68 GHz] for the circular SIW bend and corporate 1×41×4 and 1×81×8 SIW power dividers that provide equal power split with high isolation in all output ports operating in V-band [45–80 GHz] are presented and studied. The advantages of the SIW technique are its low profile, low cost, mass production, ease of fabrication and full integration with planar circuits. All the SIW bend topologies are optimized and designed to operate in the V-band frequency range. The bends and dividers are analyzed using the two-dimensional finite element method (2D-FEM). The analysis was performed in H-plane using a powerful full-wave method based on the two-dimensional finite element method (2D-FEM) programmed under MATLAB environment. The return losses, transmission coefficients and the field’s distribution are exposed in this paper. To validate our results numerically, a comparison is made and the obtained results are compared with those given by the CST Microwave Studio. It is observed that the simulation computation time is reduced with good accuracy since the discretization was done only in two dimensions.

2017
A Leaky Wave Antenna Design Based on Half-mode Substrate Integrated Waveguide Technology for X Band Applications
La revue : International Journal of Electrical and Computer Engineering (IJECE)
Domaine : telecommunications
Mots Clés :
Auteur : S. Doucha, M. Abri, H. Abri Badaoui, B. Fellah
Issn : 2088-8708 Eissn : 10.11591/ijece.v7i6.pp3467-3474 vol : 07, Num : 06, pp : 3467~3474
Résume :

A new type of leaky-wave antenna (LWA) using half-mode substrate integrated waveguide (HMSIW) as the base structure is proposed in this paper. The structure consists of an array of slot, antenna designed to operate in X band applications from 8 to 12 GHz. HMSIW preserves nearly all the advantages of SIW whereas its size is nearly reduced by half. The antenna radiates one main beam that can be steered from the backward to the forward direction by changing frequency. Copyright © 2017 Institute of Advanced Engineering and Science. All rights reserved.

2017
Analysis and Design of an Optimum Novel Millimeter T and Y-Junction SIW Power Dividers Using the Quick Finite Element Method
La revue : WSEAS Transactions on Communications
Domaine : telecommunications
Mots Clés :
Auteur : Fellah benzerga, Mehadji Abri, Hadjira ABRI Badaoui, JUNWU Tao
Issn : 1109-2742 Eissn : 2224-2864 vol : 16, Num : 39, pp : 347-352
Résume :

The aim of this paper is to present a novel technique for the design of millimetre substrate integrated waveguide (SIW) power dividers based on the Quick Finite Element Method. The return losses, transmission coefficients and the field's distribution are presented and analyzed by this technique. To present the validity and the performances of our structures, the obtained results are compared with CST commercial software in the band frequencies from 40 to 75 GHz. The numerical simulation program can provides useful design information as well as physical insights for frequencies in the millimeter wave range.

2015
Revisiting the Relation between Unemployment Rate and Economic Growth in Algéria, 1970-2014: co-Integration Approach using ARDL model
La revue : journal of quantitative Economics Studies
Domaine : économie
Mots Clés : okun's Law, economic growth, unemployment rate, HP filter, ARDL Bounds Testing Approach to Co-integration.
Auteur : R.mounia, D.mohamed, N.abdelkader
Issn : 2437-1033 Eissn : 2602-5183 vol : 1, Num : 00, pp : 1-17
Résume :

The study provides an estimation of Okun’s law in Algeria during the period (1970 - 2014) using for this purpose time series of techniques. Our empirical analysis consists of Dickey-Fuller test (ADF) (Dickey and Fuller 1979 and 1981), and the Phillips–Perron (1988) test and ARDL Bounds Testing Approach to Co-integration test between unemployment rate and economic growth. The estimated results of the present study conformed existence of stable, long run negative effect juste in one model (the difference version of Okun's law), whereas, in short run no relationship is observed. A one percent increase in economic growth is associated with reduction in the unemployment level by 0.265 percent in the long run. The ECM indicates high speed of adjustment of short run fluctuation as 63 percent short disequilibrium adjusts in a year. Algeria must try to increase and diversify the sources of economic growth. The results of this study have important implications for determining macroeconomic policy. It is absolutely essential that the Algerian economy cease to be excessively dependent on the hydrocarbon sector, which is intensive capital but requires little labour. The Algerian economy should diversify away from its dependence on the energy sector.

2017
: أثر صدمات أسعار النفط على الميزانية العامة في الجزائر: دراسة قياسية
La revue : المجلة الجزائرية للاقتصاد و الادارة
Domaine : économie
Mots Clés : صدمات أسعار النفط، الانفاق الحكومي، اختبار سببية قرانجر
Auteur : بن دحمان أمينة، ركراك مونية، عمراني فاطمة
Issn : 2170-0311 Eissn : 2600-6197 vol : , Num : 9, pp : 173-182
Résume :

الدافع من وراء هذه الدراسة هو البحث في طبيعة تأثير تقلبات أسعار النفط على السياسة المالية في البلاد, باستخدام منهجية سببية قرانجر وخلال الفترة الزمنية 1970-2014، من خلال تحديد اتجاه السببية بين تقلبات أسعار النفط الخام ( سعر النفط الحقيقي، الصدمات الموجبة لأسعار النفط، الصدمات السالبة لأسعار النفط) و أهم المتغيرات الرئيسية للسياسة المالية في الجزائر ( الانفاق الحكومي، نفقات التسيير و نفقات التجهيز). و من خلال نتائج الدراسة القياسية تم ايجاد علاقة سببية تتجه من أسعار النفط نحو مؤشرات الميزانية العامة في البلد، كل هذا يشير بقوة الى ضرورة تنويع الاقتصاد للحد من تأثير تقلبات أسعار النفط على عائدات الحكومة، ولا بد من الحكومة اشراك مبدأ التخطيط في الانفاق العام في البلاد.

2017
أثر التجارة الدولية على سوق العمل في الجزائر
La revue : Global journal of Economic and Business
Domaine : économie
Mots Clés : التجارة الدولية، سوق العمل، خلق فرص العمل، المحتوى في مجال العملية الدولية، انفتاح المحلية للصناعات التحويلية
Auteur : R.mounia, K.Nnouria, B.kouider
Issn : 2519-9293 Eissn : 2519-9285 vol : 3, Num : 1, pp : 174-190
Résume :

الهدف من هذا العمل هو الدراسة الكمية لتأثير التجارة الدولية على حركة خلق و تدمير الوظائف في الصناعة التحويلية للجزائر، من خلال تطبيق طريقة مضمون العمالة في التجارة الدولية، بالاضافة لاقتراح نموذج لقياس أثر تحرير التجارة على العمالة المحلية في الصناعات التحويلية على المدى الطويل و القصير، و لاظهار الى أي مدى تؤثر تدفقات التجارة الخارجية على هيكل العمالة المحلية في الصناعات التحويلية.

2018
Combining and comparing different machine learning algorithms to improve dissolved gas analysis interpretation
La revue : IET Generation, Transmission & Distribution
Domaine : Electrotechnique
Mots Clés : DGA, Power transformer, Diagnosis, Machine learning, Ensemble technique
Auteur : Mohammed El Amine Senoussaoui , Mostefa Brahami, Issouf Fofana
Issn : 1751-8687 Eissn : 1751-8695 vol : 12, Num : 15, pp : 3673-3679
Résume :

Since the discovery of dissolved gas analysis (DGA), it is considered as a leading technique for the diagnosis of liquid insulated power equipment. However, accurate analysis results can only be achieved if the measured gases closely reflect the actual equipment condition to enable an appropriate interpretation of these gases. In general, conventional techniques such as the ratio method, key gases, and Duval triangle combined or not with artificial intelligence techniques such as machine-learning algorithms are used for DGA interpretation. Here, four well-known machine-learning algorithms are compared in terms of DGA fault classification – Bayes network, multilayer perceptron, k-nearest neighbour, and J48 decision tree. Moreover, the effect of applying ensemble methods such as boosting through the Adaboost algorithm and bootstrap aggregation (bagging) is analysed, and the performances of these algorithms are evaluated. The data for developing classification models was transformed into three forms, other than the raw data. The obtained results clearly presented the efficiency and stability of some algorithms such as the J48 tree and Bayes networks for DGA fault classification, in particular, when the data is appropriately pre-processed. Moreover, the performance of these algorithms was found to consistently improve by integrating the concepts of multiple models or ensemble methods.

2019
Condition monitoring of in-service oil-filled transformers: Case studies and experience
La revue : IEEE Electrical Insulation Magazine
Domaine : Electrotecehniqu
Mots Clés : Reactors , Aging , Power transformer insulation , Oil insulation , Power transformers
Auteur : U. Mohan Rao ; I. Fofana ; A. Betie ; M. A. Senoussaoui ; M. Brahami ; E. Briosso
Issn : 0883-7554 Eissn : 1558-4402 vol : 35, Num : 6, pp : 33 - 42
Résume :

Transformers are one of the most strategic components in balancing the voltage levels and hence a high priority is given to their performance [1]. It is established that, insulation technology plays a critical role in judging the performance and service life in oil filled apparatus [2]. Performance of the insulation system depends mainly on the deterioration behavior of insulation oil and paper. The mechanisms that are responsible for premature aging of oil/paper insulation are almost the same in all the oil filled apparatus. Yet, there will be a significant difference in the intensity of the aging mechanisms in different apparatus. This intensity is attributable to rating, design, and duration of operation for different machines. The detailed discussions on these mechanisms are presented in the subsequent sections of this paper. However, aging of service insulants is unavoidable and is to be maintained at a lower rate or arrested to the greatest possible extent, such that, catastrophic failures and unscheduled outages may be mitigated [3]. Normally, utilities follow scheduled condition monitoring activities to avoid the consequences of premature aging. Hence, knowledge on these in-service condition monitoring activities will be helpful in understanding the exact deterioration rate of the insulation system. Real time in-service experience of several transformer fleets that belong to United Kingdom utilities are reported in [4]. An early degradation of insulation is noticed through increase in acidity and furan concentration in oil for several transformers in the fleet. Authors investigated this early degradation in different perspectives including loading conditions, manufacturers, and oil chemistry changes. It is inferred that changes in oil chemistry is an important attribute for early degradation and hence utilities are advised to adopt different asset management strategies for affected and unaffected transformers in a fleet. Recently, failure rate data of servic...

2019
Estimation of rainfall erosivity by mapping at the watershed of Macta (Algeria)
La revue : Revista Brasileira de Cartografia
Domaine :
Mots Clés : Rainfall erosivity, Erosion, Annual rainfall, Macta
Auteur : B. Bouderbala, Z. Souidi, A. Hamimed, B. Bouamar
Issn : 1808-0936 Eissn : vol : 71, Num : 1, pp : 274-294
Résume :

The aim of the present study is to estimate rainfall erosivity in the Macta watershed of western Algeria. Mapping using GIS (geographical information system) allowed better visualization of the erosivity. Five indices of erosivity were tested on a rainfall series of 42 stations over a period of 41 years. The indices used were the Arnoldus index, the Arnoldus modified Fournier index (MFI), the Rango-Arnoldus index, the Leprun index and the Val et al. index. Rainfall of between 300 and 400 mm occurs in 24 stations (57% of the watershed) where the respective values of the Arnoldus, MFI and Rango-Arnoldus erosivity range from 86.54 to 123.93 MJ Mw/ha.year, 47.47 to 75.33 and 16.11 to 36.13, respectively. Monthly rainfall variability has an important role in the concentration of erosivity. Erosion values (MFI) at the watershed range from 19.22 to 126.78, which indicates a low erosivity potential. Rainfall of less than 300 mm recorded in 15 rain gauges (36%) has respective erosivity values ranging from 39.78 MJ Mw / ha.year, 19.22 and 3.34 to 109.73, 50.27 and 17.80. The erosivity index depends not just on the annual rainfall but also on the intra-annual rainfall pattern. The ratio of the MFI index to the Rango-Arnoldus R index will be closer to unity when rainfall is higher. The lower the rainfall, the more the ratio increases in favour of MFI index. The same indices are very close when the annual rainfall reaches and exceeds 500 mm. Our study has shown the importance of inter-annual variability and its influence on rainfall erosivity. The same index of erosivity can have different values for the same amount of annual rainfall, which means that it is the inter-annual variability of rainfall that leads to a high erosivity index. The method of calculating erosivity described by Paez proved effective, as it overcomes the constraint related to the unavailability of rainfall intensity data, especially in semi-arid areas. The present study could serve as a strategic support for socio-environmental decisions and could also complement any study, taking into account the different factors of water erosion. Our results can thus be taken as extra support to any study and decision on hydro-environmental development within the Macta watershed.

2017
Optimization Of A Photovoltaic Generator With A New Solar Tracker
La revue : Journal of Electrical Engineering
Domaine : Electrotechnique
Mots Clés : Photovoltaic generator, Solar panels; tracker; yield, optimization
Auteur : Brahami Imen Souhila, Brahami Mostefa, Tilmatine Amar, Senoussaoui Mohammed El Amine
Issn : 1582-4594 Eissn : vol : 17, Num : 3, pp : 178-187
Résume :

Electricity generation using conventional sources such as fossil fuels raises a lot of problems either economically since it is a non-renewable or environmentally, due to the release of greenhouse gas that are the main causes of global warming. Electrical energy from photovoltaic effect provides an alternative to that produced in fossil energy power plants since it is sustainable and environmentally friendly. Many kinds of research have been conducted and still developing in order to improve overall solar system’s efficiency and especially photovoltaic ones. The solar tracker is one of the elements that contribute to increase the maximum power captured from solar panels by adjusting their position in an optimal direction towards the sun. In this paper, the design of low cost, solar generator provided with a new single axis tracker (east-west) for a predetermined inclination of 30 degrees was developed. This new tracker, on sunny days, can increase the generation of the power station by 30% in comparison with a fixed system, even if it is made of cheap material, such as resistors and transistors. The generator follows the sun using a low power motor connected to a force multiplier; which provides a low energy consumption.

2019
Numerical Study of Natural Convection in Vertical Cylindrical Annular Enclosure Filled with Cu-Water Nanofluid under Magnetic Fields
La revue : Defect and Diffusion Forum
Domaine : heat and mass transfer
Mots Clés : Computational fluid mechanics; Natural Convection; Nanofluid; Magnetic Field; Finite Volume Method; Cylindrical coordinate, Partially Annular; Average Nusselt Number.
Auteur : Mohamed A MEDEBBER, Abderrahmane AISSA, Mohamed El Amine SLIMANI and Noureddine Retiel
Issn : 1662-9507 Eissn : vol : 392, Num : , pp : 123-137
Résume :

The two dimensional study of natural convection in vertical cylindrical annular enclosure filled with Cu-water nanofluid under magnetic fields is numerically analyzed. The vertical walls are maintained at different uniform hot and cold temperatures, TH and TC, respectively. The top and bottom walls of the enclosure are thermally insulated. The governing equations are solved numerically by using a finite volume method. The coupling between the continuity and momentum equations is effected using the SIMPLER algorithm. Numerical analysis has been carried out for a wide range of Rayleigh number (103 ≤Ra≤106), Hartmann number (1 ≤Ha≤100) and nanoparticles volume fraction (0 ≤ϕ≤0.08). The influence of theses physical parameters on the streamlines, isotherms and average Nusselt has been numerically investigated.

2018
Effect of Surface Radiation on free Convection in Vertical Cylinders Partially Annular
La revue : Defect and Diffusion Forum
Domaine : heat and mass transfer
Mots Clés : Free convection; Surface radiation; Finite Volume Method; Coordinate cylinder, Radiative Transfer Equation (RTE), Discrete Ordinates Method (DOM), Partially Annular caviy; Average Nusselt Number.
Auteur : Mohamed A. MEDEBBER, Belkacem OULD SAID, Noureddine RETIEL
Issn : 1662-9507 Eissn : vol : 389, Num : , pp : 36-49
Résume :

Two dimensional combined free convection and thermal radiation in an annular region of two concentric vertical cylinders filled with air (Pr=0.71) has been numerically investigated. The steady-state continuity, Navier–Stokes and energy equations were carried out by the finite volume method, and the Discrete Ordinates Method (DOM) was used to solve the radiative heat transfer equation (RTE). The flow is considered to be laminar and the properties of air are assumed to be constant except for the density variation for which the Boussinesq approximation is used. Concerning the radiation exchange, we consider that the fluid (air) is transparent, so only the solid surfaces contribute to the radiation exchange and assumed to be diffuse-gray. The computations are performed for Rayleigh number (Ra) in the range 103≤Ra≤106 and for the surface emissivity (ε) 0≤ε≤1 while the radii ratio of the curvature (K) is kept equal to 2. The key parameters for this analysis are considered as Rayleigh number (Ra), surface emissivity (ε). Results are reported in terms of isotherms, streamlines and total average Nusselt numbers. The results showed that the mean total Nusselt number increases monotonically with increasing Ra number and the surface emissivity.

2017
Numerical Study of Natural Convection in a Vertical Cylindrical Partially Annular
La revue : Mechanics and Mechanical Engineering
Domaine : heat and mass transfer
Mots Clés : natural convection, Finite Volume Method, partially annular, Nusselt number
Auteur : Mohamed A. MEDEBBER, Noureddine RETIEL
Issn : 1428-1511 Eissn : 2354-0192 vol : 22, Num : 1, pp : 71–86
Résume :

A study of free convection in a vertical cylinder partially annulus is conducted numerically. Uniform temperature is imposed cross a vertical wall, while the top and bottom walls are adiabatic. The governing equations are solved numerically by using a finite volume method. The coupling between the continuity and momentum equations is effected using the SIMPLER algorithm. Solutions have been obtained for Prandtl numbers equal to 7.0, Rayleigh numbers of 103 to 106 and height ratios of 0 to 1. The influence of physical and geometrical parameters on the streamlines, isotherms, average Nusselt has been numerically investigated.

2017
Numerical Study of Double Diffusive Convection within the Annular Region of Two Concentric Vertical Cylinders
La revue : Defect and Diffusion Forum
Domaine : heat and mass transfer
Mots Clés : Double-diffusive convection, the finite volume method, partially annular, the Nusselt number, the Sherwood numbers
Auteur : Mohamed A. MEDEBBER, Noureddine RETIEL
Issn : 1662-9507 Eissn : vol : 374, Num : , pp : 1-17
Résume :

This article reports a numerical study of double-diffusive convection within the annular region of two concentric vertical cylinders. The outer vertical wall is maintained at lower uniform temperature and concentration, while the inner vertical wall is maintained at higher uniform temperature and concentration. The top and bottom horizontal walls are adiabatic and impermeable to mass transfer. The resulting governing equations are solved using a finite volume method. The coupling between the continuity and momentum equations is solved using the SIMPLER algorithm. The compilations have been obtained for Prandtl numbers (Pr) equal to 7.0, and Lewis number (Le) equal to 100. The thermal Rayleigh number (RaT) and height ratio (X) are, respectively, varied in the range 103≤RaT≤106 and 0.0≤X≤1.0. The influence of physical and geometrical parameters on the streamlines, isotherms, isoconcentrations, average Nusselt and Sherwood numbers has been numerically investigated in detail

2016
Damage analysis of composites reinforced with Alfa fibers: Viscoelastic behavior and debonding at the fiber/matrix interface
La revue : Journal of Applied Polymer Science
Domaine : Polymer science
Mots Clés : composites; fibers; mechanical properties; resins; surfaces and interfaces
Auteur : M. Khaldi, A. Vivet, A. Bourmaud, Z. Sereir, B. Kada
Issn : 0021-8995 Eissn : 1097-4628 vol : 133, Num : 31, pp :
Résume :

In this article, we first review state‐of‐the‐art experimental techniques and measurements to characterize the mechanical properties of anisotropic vegetal alfa fibers, epoxy‐resin, and the behavior of the interphase between the matrix and alfa fibers. Second, we conduct experimental tests to determine the mechanical properties of fibers, resin, and the interphase. Third, we carry out a series of finite element simulations to predict damage initiation and to estimate crack propagation in alfa‐fiber/epoxy‐resin (AFER) composites. Different tests to determine the longitudinal Young's modulus of alfa fibers and epoxy resin as well as nanoindentation tests to obtain the transverse stiffness of the fibers are presented. Experimental results from the characterization are introduced in a micromechanical model to estimate, using the concept of the energy release rate (ERR), the matrix crack, and its interaction with interfacial debonding. The wettability problems in the preparation of vegetable composites and their effect on fiber‐matrix interfacial debonding are also addressed. The analysis of the damage behavior of AFER composites demonstrates that under load transverse to the fiber axis, a crack initiated in the matrix is propagated perpendicular to the direction of the load. Near the interface, the ERR decreases and this energy is higher in the presence of interfacial debonding areas generated by problems of fiber wettability.

-0001
Experimental analysis of Implant–cement interfacial behaviour under shear mode loading conditions
La revue :
Domaine : Biomatériaux
Mots Clés :
Auteur : Bouziane M M, Khaldi M, Serier B, Benseddiq N, Zerdali M, Benbarek S, Bachir Bouiadjra B A
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2019
Simulation and Practical Realization of A 24-Pair Electronic Continuity Test Circuit for MSAN ZTE
La revue : Journal of Telecommunication, Electronic and Computer Engineering
Domaine : Telecommunications
Mots Clés : Electrical Continuity; MDF; MSAN; Dispatcher; ZTE
Auteur : Samir Ghouali, Mohammed Moulay, Mohammed Feham
Issn : 2180-1843 Eissn : 2289-8131 vol : 11, Num : 04, pp : 19-23
Résume :

The continuity test of a telephone line is a technique used very often by every Telecom site engineer. Continuity refers to communication that does not face any interruption. Very often, the continuity measurement takes place during troubleshooting to ensure that the lines are intact. The work presented in this paper is based on the principle of MDF continuity rule lines for MSAN site. It presents the practical realization of a continuity tester circuit to verify several telephone lines simultaneously, specifically 24 pairs (24 subscribers) at the same time. Our solution suggested for making troubleshooting in one of the outages/ malfunctions more flexible and fluid in terms of intervention and time for repair. A case study involving 18 sites in two different regions in Algeria, Constantine (without circuit) and El Oued (with circuit) was conducted and the results showed there was a gain ratio estimated at about 338/1361 (Min).

-0001
GGA+U Study of electronic and magnetic properties of Pr(Fe/Cr)O3 cubic perovskites,
La revue : Journal of supercond.
Domaine :
Mots Clés :
Auteur : M. Rezaiguia, W. Benstaali, A. Abbad, S. Bentata, B. Bouhafs
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Theoretical prediction of half metallic ferromagnetic full-Heusler alloys Cs2 CrGe
La revue :
Domaine :
Mots Clés :
Auteur : S. Cherid W. Benstaali, A. Abbad, S. Bentata, T. Lantri, B. Abbar,
Issn : Eissn : vol : , Num : , pp :
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-0001
Effect of Coulomb interactions and Hartree-Fock exchange on structural, elastic, optoelectronic and magnetic properties of Co 2 MnSi Heusler: A comparative study
La revue : Journal of Magnetism and Magnetic Materials
Domaine :
Mots Clés :
Auteur : T. Lantri, S. Bentata, B. Bouadjemi, W. Benstaali, B. Bouhafs, A. Abbad, A. Zitouni
Issn : Eissn : vol : , Num : , pp :
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-0001
Structural parameters and their effects on the electronic transport properties in aperiodic superlattice profile
La revue :
Domaine :
Mots Clés :
Auteur : F. Bendahma, R. Djelti and S. Bentata
Issn : Eissn : vol : , Num : , pp :
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-0001
irst principle study of spintronic properties for double perovskites Ba2XMoO6 with X =V, Cr and Mn
La revue :
Domaine :
Mots Clés :
Auteur : A. Souidi, S. Bentata, W. Benstaali, B. Bouadjemi, A. Abbad, T. Lantri
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Search for half-metallic ferromagnetism in orthorhombic Ce(Fe/Cr)O3 perovskites
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, W. Benstaali, H. A. Bentounes, S. Bentata, Y. Benmalem
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Optoelectronic properties of transition metals doped cubic Cadmium Sulfide
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, H. A. Bentounes, W. Benstaali, S. Bentata, B. Bouadjemi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Effect of Correlated Mixed Disorder on Miniband Structure and Resonance Energy of GaAs/AlxGa1-xAs Superlattice
La revue :
Domaine :
Mots Clés :
Auteur : Radouan Djelti, Samir Bentata, Zoubir Aziz and Anissa Besbes
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
INFLUENCE OF HUBBARD COEFFICIENT ON THE STRUCTURAL, ELECTRONIC, MAGNETIC AND OPTICAL PROPERTIES OF MN/FE CODOPED ZNS,
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, H. A. Bentounes, W. Benstaali, S. Bentata, B. Bouadjemi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Ab-initio study of optoelectronic and magnetic properties of the orthorhombic NdMnO 3 perovskite
La revue :
Domaine :
Mots Clés :
Auteur : B. Bouadjemi, S. Bentata, A. Abbad and W. Benstaali
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Ab-initio study of structural, electronic and magnetic properties of CdTe doped transition metal Co
La revue :
Domaine :
Mots Clés :
Auteur : A. Zitouni, S. Bentata, W. Benstaali and B.Abbar
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Ballistic transport in one-dimensional random dimer photoni crystals
La revue :
Domaine :
Mots Clés :
Auteur : S. Cherid, S. Bentata, R.Djelti and Z. Aziz
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Influence of Ni–Ni separation on the optoelectronic and magnetic properties of Ni-doped cubic cadmium sulphide
La revue :
Domaine :
Mots Clés :
Auteur : W. Benstaali, S. Bentata, H. A. Bentounes, A. Abbad, B. Bouadjemi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Mixed disorder in GaAs/Alx Ga1−x As superlattices and its effect on the range of wavelength infrared lasers
La revue :
Domaine :
Mots Clés :
Auteur : R.Djelti, Z. Aziz, S. Bentata
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Half-metallic ferromagnetism in PrMnO3 perovskite from first principles calculations
La revue :
Domaine :
Mots Clés :
Auteur : B. Bouadjemi, S. Bentata, A. Abbad, W. Benstaali and B.Bouhafs
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Electronic transmission in non-linear potential profile of GaAs/AlxGa1_xAs biased quantum well structure
La revue :
Domaine :
Mots Clés :
Auteur : F.Z. Meghoufel, S. Bentata, S. Terkhi, F. Bendahma and S. Cherid
Issn : Eissn : vol : , Num : , pp :
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-0001
Study of transmission properties in GaAs/Al x Ga1-x As superlattices generated by specific sequences
La revue :
Domaine :
Mots Clés :
Auteur : S.Terkhi, Z. Aziz, S.Bentata, B.Bouadjemi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Ab-initio study of magnetic, electronic and optical properties of Z nSe doped-transition metals
La revue :
Domaine :
Mots Clés :
Auteur : W. Benstaali, S. Bentata, A. Abbad and A. Belaidi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
First-principles calculations of magnetic, electronic and optical properties of binary GaN and ternary CrGaN, CuGaN
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, W. Benstaali, H.A. Bentounes, S. Bentata and A. Belaidi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Study of electronic and magnetic properties of binary zinc sulfide and ternary manganese - and iron-substituted alloys
La revue :
Domaine :
Mots Clés :
Auteur : A. Abbad, S. Bentata, W. Benstaali, H.A. Bentounes, and B.Bouadjemi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Electronic transmission in random trimer InAs/In x Ga1 superlattices
La revue :
Domaine :
Mots Clés :
Auteur : S.Terkhi, S.Bentata, R.Djelti, B.Bouadjemi
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Resonant tunneling in GaAs/Alx Ga1−x As superlattices with aperiodic potential profiles
La revue :
Domaine :
Mots Clés :
Auteur : R.Djelti, Aziz.Z, Bentata.S, A Besbes
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Nature of the electronic states in Radom Dimer AlxGa1-xAs superlattices
La revue :
Domaine :
Mots Clés :
Auteur : S. Bentata
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Modelisation and simulation of the transmission properties in Dimer Fibonacci Superlattices
La revue :
Domaine :
Mots Clés :
Auteur : Z. Aziz, Y. Sefir, R. Djelti and S. Bentata
Issn : Eissn : vol : , Num : , pp :
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-0001
Suppression of the singularly localized states in dimer quasiperiodic Fibonacci superlattices
La revue :
Domaine :
Mots Clés :
Auteur : Z. Aziz, S. Bentata, R. Djelti and Y. Sefir
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
he ballistic dimer resonance in the one-dimensional disordered photonic crystals
La revue :
Domaine :
Mots Clés :
Auteur : H. Khalfoun, S. Bentata, M. Bouamoud, L. Henrard and C. Vandenbem
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Analytical evidence of commuting resonance energy in correlated disorder trimer GaAs-Alx Ga1-xAs superlattices
La revue :
Domaine :
Mots Clés :
Auteur : R.Djelti, S. Bentata, Z. Aziz and A.. Besbes
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Electronic transport in random dimer GaAs-Alx Ga1-xAs superlattices
La revue : International Journal of Modern Physics B
Domaine :
Mots Clés :
Auteur : R.Djelti, S. Bentata, Z. Aziz and A.. Besbes
Issn : Eissn : vol : 23, Num : 25 5067 , pp :
Page web de l'auteur

-0001
Nature of the enhanced resonant modes in the one-dimensional photonic random dimer systems
La revue :
Domaine :
Mots Clés :
Auteur : H Khalfoun, M Bouamoud, S Bentata, L Henrard and C Vandenbem
Issn : Eissn : vol : , Vol. 23, Num : No. 25 5067 , pp :
Page web de l'auteur

-0001
Theoretical study of correlated disorder in superlattices under bias voltage
La revue :
Domaine :
Mots Clés :
Auteur : R.Djelti, S. Bentata, Z. Aziz and A.. Besbes
Issn : Eissn : vol : , Vol. 23, Num : No. 25 5067 , pp :
Page web de l'auteur

-0001
Effect of applied bias on transmission properties of dimmer Fibonacci superlattices
La revue :
Domaine :
Mots Clés :
Auteur : Z. Aziz, S. Bentata, R. Djelti and E. Alandaloussi
Issn : Eissn : vol : Vol. 23, Num : No. 19, pp :
Page web de l'auteur

-0001
Structural disorder and its effect in laser wavelength GaAs-Alx Ga1-xAs superlattices
La revue :
Domaine :
Mots Clés :
Auteur : R.Djelti, S. Bentata, Z. Aziz and A. Bebes
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
The ballistic resonance of transversal mechanical waves in random dimer systems
La revue :
Domaine :
Mots Clés :
Auteur : H. Khalfoun, S. Bentata, M. Bouamoud and L. Henrard
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Nature des états électroniques des superréseaus (Type Dimer/Trimed) désordonnés en hauteur de barrière
La revue : Lebanese Science Journal,
Domaine :
Mots Clés :
Auteur : R.Djelti, S. Bentata and Z. Aziz
Issn : Eissn : vol : 8, Num : 1, pp :
Page web de l'auteur

-0001
Study of Tunnelig Transport in Disorder DNA Structures
La revue : Journal of Applied Sciences
Domaine :
Mots Clés :
Auteur : R. Bentata and S. Bentata
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
To the Ballistic Dimer Resonance in the Propagation of Mechanical Waves in One Dimensional Lattice
La revue : Journal of Applied Sciences
Domaine :
Mots Clés :
Auteur : H. Khalfoun, M. Bouamoud and S. Bentata
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Electronic States Nature of Trimer Height Barrier Disorder Superlattices
La revue : Journal of Applied Sciences
Domaine :
Mots Clés :
Auteur : R. Djelti, S. Bentata and Z. Aziz
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Trimer Barrier Height Effect on the Nature of the Electronic State of the Superlattices GaAs/Alx Ga1−x As
La revue : Journal of Applied Sciences
Domaine :
Mots Clés :
Auteur : R. Djelti, S. Bentata and Z. Aziz
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Singular localised states in quasiperiodic GaAs/Al x Ga1-xAs Fibonacci superlattices
La revue : European Physical journal Applied Physics
Domaine :
Mots Clés :
Auteur : Z. Aziz, S. Bentata and R. Djelti
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Effect of the Alumium fraction “x” in subminiband structures of Fibonacci AlxGa1−xAs/GaAs superlattices
La revue : Journal of applied sciences
Domaine :
Mots Clés :
Auteur : Z. Aziz, S. Bentata and R. Djelti
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Two types of extended statesin Random Dimer-Barrier Superlattices
La revue : Journal of applied sciences
Domaine :
Mots Clés :
Auteur : S. Bentata
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

-0001
Nature of the Eigenstates in the Miniband of Random Dimer-Barrier Superlattices
La revue : Journal of applied sciences
Domaine :
Mots Clés :
Auteur : S. Bentata , B. Ait Saadi & H. Sediki
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2018
Optical Code Division Multiple Access for a FTTH system
La revue : Photonics Letters of Poland
Domaine : Optical Communication
Mots Clés :
Auteur : M.Bouregaa, M.Chikh-Bled, M.Debbal, C.Ouadah, H.Chikh-Bled
Issn : 2080-2242 Eissn : vol : 10, Num : 04, pp : 121-123
Résume :

Many multiple access techniques have been proposed and demonstrated to provide flexible solutions for FTTH network configurations. The performance of this system suffers because of the correlation properties that contribute to a high level of Multiple Access Interference (MAI), low system capacity (users), and lower transmission rate. In this paper, we have proposed Optical CDMA (OCDMA) as a configuration solution for FTTH networks to improve the performance of this type of network.

2019
Improved IMC-Filter Design to IMC-PI Equivalence: Application to Quadrotor
La revue : IFAC-PapersOnLine
Domaine : Control
Mots Clés : Reference model IDA-PBC Autonomous UAV Internal energy Tracking control
Auteur : Yasser Bouzid, Houria Siguerdidjane, M Zareb, Yasmina Bestaoui.
Issn : 2405-8963 Eissn : 24058963 vol : 52, Num : 12, pp : 158-163
Résume :

This paper proposes a method to reach the equivalence between an IMC and a PI controller regardless of the model order. To this end, the key idea consists of using a specific IMC filter that exhibits a good level of robustness and further leads to get a structure of a PI controller whatever the order of the model is. The developed procedure constitutes the main contribution of this paper. To meet given set of specifications, the controller parameters are tuned through a straightforward analytic way using the dynamics of the tracking error. Furthermore, in order to evaluate the efficiency level of this procedure, an application to control an autonomous vehicle is described and the simulation results are shown to be satisfactory.

2019
Influence of Temperature on the Chromatic Dispersion of Photonic Crystal Fiber by Infiltrating the Air Holes with Water
La revue : Journal of Optic Communication
Domaine : Photonic Fiber
Mots Clés : optoelectronics, photonic fiber, sensor, numerical simulation, optical fiber, chromatic dispersion
Auteur : M. DEBBAL M. BOUREGAA H. CHIKH-BLED M. CHIKH-BLED M. OUADAH
Issn : 2191-6322 Eissn : vol : 40, Num : , pp : 1-4
Résume :

This paper describes study of photonic crystal fiber (PCF) in order to study the influence of temperature on the chromatic dispersion; these types of fibers are based on commercial structures, but air holes will be infiltrated with water. Using finite domain-beam propagation method, it is shown that the zero dispersion wavelength can be shifted from 1.058753 to 1.271767 µm, a shift of 213 nm. At 50 °C, a shift of 169 nm.

2020
About the influence of temperature and environmental relative humidity on the longitudinal and transverse mechanical properties of elementary alfa fibers
La revue : Journal of Applied Polymer Science
Domaine : Polymer science
Mots Clés : biodegradable; cellulose and other wood products; fibers; hydrophilic polymers; mechanical properties
Auteur : M Khaldi, M M Bouziane, A Vivet, H Bougherara
Issn : 0021-8995 Eissn : 1097-4628 vol : 137, Num : 137, pp :
Résume :

Composites reinforced with plant‐based fibers present a high potential for valorization in new industrial applications due to their good specific mechanical characteristics, renewability, and recyclability. In order to accelerate their wide industry adoption, it is critical to assess their behavior and durability in heat and humid environments. This article aims at investigating the effects of temperature and relative humidity (RH) on the longitudinal and transverse mechanical properties of the lignocellulosic fibers extracted from alfa plant (Stipa tenacissima L). For this purpose, tensile and nanoindentation tests were performed on elementary alfa fibers subjected to a thermal cycle of 200°C. The fibers were held at various periods of 15, 30, 60 and 120 min. The test results showed that the longitudinal and transverse Young's moduli are moderately affected by short thermal cycles having duration of 15–30 min. However, for longer thermal cycle (i.e., 2 hr), a degradation of 21% for the transverse modulus was recorded. This degradation doubled for the longitudinal modulus (43 vs. 21%). A similar trend was observed for the breaking strength. This study also showed that the RH strongly affects the mechanical performances of alfa fibers.

-0001
A component-based language specific to complex systems modeling
La revue : 2013 IEEE 14th International Conference on Information Reuse & Integration (IRI)
Domaine : Informatic
Mots Clés : Complex Systems , Component-Based Language , Domain-Specific Language , SysML
Auteur : houraya Bouabana-Tebibel ; Stuart H. Rubin ; Kadaouia Habib ; Sofia Mellah ; Lynda Allata
Issn : Eissn : vol : , Num : 13867497, pp :
Résume :

Abstract: The modeling and design of complex systems continues to face grand challenges in feedback and control. Existing languages and tools, either textual or graphical, bring some improvement for such purposes, but much remains to be done in order to readily insure scalability. In this paper, we propose a language, which gathers specialization and composition properties. It is our belief that the latter properties bear the necessary capabilities to overcome the difficulties raised when developing these systems. The language is designed, on one hand, in a way to be specific to complex system domains. It supports, on the other hand, a component-based structure that conforms to a user-friendly component assembly. It is conceived in the spirit of SysML concepts. Its' programs generate Internal Block Diagrams. A programming tool is built on the basis of the Eclipse framework.

-0001
في تعليمة اللغة العربية )بين الاسس النظرية والإجراءات التطبيقة)
La revue :
Domaine :
Mots Clés :
Auteur :
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2019
الرحلات الجزائرية تاريخ وعلم وأدب - "أنفس الذّخائر وأطيب المآثر" للشيخ الطّيب المهاجي أنموذجا-
La revue : مجلة عصور الجدية
Domaine : تاريخ وأدب
Mots Clés : الرحالة- الجوانب العلمية- الجزائر- اللغويات
Auteur : د.بزاوية مختار
Issn : 2170_1636 Eissn : 2600_6324 vol : 09, Num : 03, pp : 273-291
Résume :

تميزت بعض الرحلات بنشاط علمي متميز، فأضحت تزخر بالعلم والأدب والتاريخ والاجتماع، وغيرها من الفنون، ومن أنفس هذه الرحلات رحلة الطيب المهاجي التي وسمها بــــ : "أنفس الذخائر وأطيب المآثر". ولقد حوت هذه الرحلة من العلوم اللغوية والشرعية ما لا يخفى على اللبيب، فالشيخ الجليل يمثل ظاهرة دينية إصلاحية جمعت إلى معانيها موهبة أصيلة، أهّلته لأنْ يحتل مكانة عالية في العلوم اللغوية والشرعية، فهو من العلماء الجزائريين الذين أدخلهم التاريخ من بابه الواسع. ومن البديهي أنّ العالم لا يمكن أن يُبرِز للناس علمَه وإنتاجه وهو منغلق على نفسه، لذا قام شيخنا برحلات علمية مختلفة كرحلته إلى الحرمين الشريفين وتونس وغيرهما، ولقي عدة مشايخ وأخذ عنهم الإجازات، مما أسهم في تفاعل ثقافي كبير بينه وبين علماء الأمصار الإسلامية. وقد اكتشفوا من خلال هذا التفاعل قدرة الشيخ وموهبته العلمية الخارقة. كما حوت هذه الرحلة مسائل علمية دقيقة في العلوم اللغوية كالنحو والصرف، والعلوم الشرعية وفتاوى ونوازل كثيرة، مما أبرز تمكّن الشيخ من العلوم واللغوية والشرعية، وقدرته العجيبة في تناول هذه المسائل بالتحليل العميق، والرؤية النافذة. ولقد ركزت في مداخلتي على بعض هذه الجوانب العلمية باعتبارها عاملا مهما من عوامل التفاعل الثقافي بين العلماء الجزائريين وغيرهم.

2019
المناظرات والمحاورات النحوية وأثرها في الدرس اللغوي -كتاب طبقات النحويين واللغويين للزبيدي أنموذجا
La revue : مجلة إشكالات في اللغة والأدب
Domaine : اللغة
Mots Clés : المناظرات؛ المحاورات؛ النحاة ؛ اللغويون؛ الاختلافات.
Auteur : د.بزاوية مختار
Issn : 2335-1586 Eissn : 2600_6324 vol : 08, Num : 04, pp : 509-530
Résume :

كانت نشأة النحو لغايات نبيلة وهي صون القرآن الكريم واللغة العربية من اللحن والتغيير، وقد كان النحو العربي في بدايته يزخر بمجالس العلماء من القراء واللغويين ورواة الأشعار، فيتدارسون مسائل العربية ويستنبطون قواعدها. ومع مرور الزمن تحول النحو إلى باب من التكلف والتعقيد وكثرة الاختلافات والمذاهب النحوية، وبين هذا وذاك سجلت لنا كتب النحو واللغة والتاريخ مناظرات ومحاورات بين هؤلاء العلماء، ساهمت بشكل كبير في إثراء الدرس اللغوي والنحوي. وفي هذا البحث حاولت أن أجمع بعض ما تفرّق في الكتب من هذه المناظرات والمحاورات، مركزا على ما ورد في كتاب "طبقات النحويين واللغويين" للزبيدي، ولذلك لأتعرف على البواعث الحقيقية لهذه المناظرات، فهل كانت خدمة للدرس والتعلم؟ أم مفاخرة ومكابرة وترفا علميا ابتُلي به أسلافنا آنذاك؟

2015
Preference-Based Web Service Composition: Case-Based Planning Approach
La revue : I.J. Information Technology and Computer Science
Domaine : Intelligence Artificielle
Mots Clés : Web Service Composition; Case Based Planning; User Preferences.
Auteur : Y.Hachemi, SM.Benslimane
Issn : 2074-9007 Eissn : 2074-9015 vol : 07, Num : 06, pp : 74-82
Résume :

Web service selection is an indispensable process for web service composition. However it became a difficult task as many web services are increased on the web and mostly they offer similar functionalities, which service will be the best. User preferences are the key to retain only the best services for the composition. In this paper, we have proposed a web service composition model based on user preferences. To improve the process of web service composition we propose a case-based planning approach with user preferences which uses successful experiences in past to solve similar problems. In this paper we integrate user preferences in the phase of selection, adaptation and planning. Our main contributions are a new method of case retrieval, an extended algorithm of adaptation and planning with user preferences. Results obtained offer more than a solution to the user and taking both functional and nonfunctional requirements.

2014
Case-Based Planning with User Preferences for Web Service Composition
La revue : International Journal of Web Portals (IJWP)
Domaine : Service-Oriented Computing. web service composition
Mots Clés : Case-Based Planning, Ontologies, User Preferences, Web Service Composition
Auteur : Y.Hachemi, SM.Benslimane
Issn : 1938-0194 Eissn : 1938-0208 vol : 06, Num : 04, pp : 58-71
Résume :

Web services composition has emerged as a solution to answer the requester's requirements. However, the selection of an appropriate Web service has become a difficult task due to the number of Web services present on the Web and mostly they offer similar functionalities. User preferences are a key factor that can be used to rank candidate services and retain only the best ones. To improve the process of web service composition the authors propose a Case-Based Planning (CBP) approach based on preferences which uses successful experiences in past to solve similar problems at present or/and in the future. How to make a choice base on non-functional factors becomes a problem that need to be solved. This paper, argues that the selection should be considered in a global manner based on the user's preferences. The authors present a framework that deals with web service composition based on user preferences and CBP method. Results obtained offer more than a solution to the user and taking both functional and non-functional requirements.

2009
Web Services Composition Applying MDA.
La revue : 2nd Conférence Internationale sur l'Informatique et ses Applications (CIIA'09), Saida, Algeria
Domaine : web service composition
Mots Clés : Web Service Composition; MDA
Auteur : Y.Hachemi, B.Malki, D.Amar Bensaber
Issn : Eissn : vol : 02, Num : , pp :
Résume :

Currently, Web services are available on Internet in a simple and easy way to use. However, a single service can not respond to a predetermined request by user. Thus, it is necessary to compose services, ie, organize them in a manner to achieve the goal automatically. The semantic web services increases the descriptions of web services using semantic annotations (eg ontology). There are different approaches to express the semantic aspect as OWL-S, WSMO, WSDL-S and a recent W3C recommendation SAWSDL (Semantic Annotations for WSDL and XML Schema). To address complexity, scalability and heterogeneity problems of Web Systems, the OMG has proposed the model driven approach MDA based on the concepts of models, metamodels and transformations. The method describes a process that guides the developer through various phases, starting with the models, and ending with a new compound that can be deployed and published.

2020
Improved IMC-filter design and IMC-PI equivalence: Application to quadrotor under gust of wind
La revue : Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering
Domaine : Systems and Control Engineering
Mots Clés : Quadrotor, autonomous system, internal model control, PI controller
Auteur : Yasser Bouzid, Houria Siguerdidjane, Elmehdi Zareb
Issn : 0959-6518 Eissn : 2041-3041 vol : , Num : , pp : 1-13
Résume :

As known, internal model control is equivalent to a PI or a PID controller provided that the mathematical model associated to the process to be controlled is of first or second order respectively. So, to go beyond these particular cases and to make an extension in bringing more theoretical results, the article proposes a method to reach the equivalence between an internal model control and a PI controller regardless of the model order. To this end, the key idea consists of using a specific filter that exhibits superior robustness level compared to the classical filter and further leads to get a structure of a PI controller whatever the order of the model is. The developed procedure constitutes the main contribution of this article. To meet given set of specifications, the controller parameters are tuned through a straightforward analytic way using the dynamics of the tracking error. The proposed tuning strategy constitutes another contribution of the article. Furthermore, to evaluate the efficiency level of this procedure, an application to control an autonomous vehicle is described and the simulation results are shown to be satisfactory confirmed by a series of experimental tests.

-0001
Colombeau generalized functions and solvability of differential operators
La revue : Zeitschrift für Analysis und ihre Anwendungen
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; solvability of differential operators
Auteur : B. Chikh
Issn : Eissn : vol : 25, Num : 4, pp : 467-477
Page web de l'auteur

-0001
Ultraregular generalized functions of Colombeau type
La revue : J. Math. Sci. Univ. Tokyo
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; Regularity
Auteur : B. Chikh
Issn : Eissn : vol : 15, Num : 4, pp : 427—447
Page web de l'auteur

-0001
Generalized Gevrey Ultradistributions
La revue : New York J. Math
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; Regularity
Auteur : B. Chikh
Issn : Eissn : vol : 15, Num : 3, pp : 37-72
Page web de l'auteur

-0001
Affine ultraregular generalized functions
La revue : Banach Center Publications
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; Regularity
Auteur : B. Chikh
Issn : Eissn : vol : 88, Num : , pp : 39-53
Page web de l'auteur

-0001
Algebras of generalized Gevrey ultradistributions
La revue : Novi Sad J. Math
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; ultradistributions
Auteur : B. Chikh
Issn : Eissn : vol : 41, Num : , pp : 53-62
Page web de l'auteur

-0001
Generalized Gevrey ultradistributions and their microlocal analysis
La revue : Oper. Theo. Adv. Appl
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; ultradistributions
Auteur : B. Chikh
Issn : Eissn : vol : 213, Num : , pp : 235-250
Page web de l'auteur

-0001
An algebra of generalized Roumieu ultradistrbutioms
La revue : Rend. Sem. Mat. Univ. Pol. Torino
Domaine : Mathématiques
Mots Clés : Colombeau generalized functions; ultradistributions
Auteur : B. Chikh
Issn : Eissn : vol : 70, Num : 2, pp :
Page web de l'auteur

-0001
Generalized Roumieu ultradistributions and their microlocal analysis
La revue : Novi Sad J. Math
Domaine : Mathématiques
Mots Clés : Generalized functions; ultradistributions; microlocal analysis
Auteur : K. Fatma Zohra
Issn : Eissn : vol : 46, Num : 2, pp : 181-200
Page web de l'auteur

-0001
Fuzzy Farthest Point First Method for MRI Brain Image Clustering
La revue : IET Image Processing
Domaine : Informatique
Mots Clés : Fuzzy ; MRI Image Clustering
Auteur : D. Mohammed
Issn : Eissn : vol : 13, Num : 13, pp : 2395-2400
Page web de l'auteur

-0001
Galerkin method for time fractional semilinear equations
La revue : Submitted
Domaine : Mathématiques
Mots Clés : Galerkin method; fractional derivative ; semilinear Equations
Auteur :
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2017
التعريف بجهود علما الجزائر في علم التصريف. أحمد أبو العباس الوهراني أنموذجا
La revue : مجلة المناهل
Domaine : علم الصرف/تراجم جزائرية
Mots Clés : لامية، الأفعال، الوهراني، شرح ابن مالك
Auteur :
Issn : 2437-0738 Eissn : vol : 3, Num : 3, pp : 223-244
Résume :

حاولت في الورقة البحثية ان أميط اللثام عن احد أعلام الجزائرية في علم اللغة وفروعها، خاصة وأن صاحب هذا الشرح أعني الوهراني مغمور لا توجد له تراجمة في كتب التراجم، وكان الغرض في إجلاء جهود علماء الجزائر في الشروح الصرفية ، مبينا منهجه في الشرح بعد التعريف به وقيمة الشرح في ميزان الشروح الصرفية

2019
Le pronom On dans la presse écrite : une marque d’effacement ou d’engagement énonciatifs ?
La revue : IHALAT
Domaine : Les sciences du langage
Mots Clés : locuteur, énonciateur, effacement énonciatif, engagement énonciatif, On.
Auteur : A. Mazot
Issn : 2602+7585 Eissn : vol : , Num : 4, pp : 228-240
Résume :

Notre étude s’inscrit dans le cadre de la théorie de la linguistique de l’énonciation. Notre corpus est composé d’un ensemble d’énoncés tirés de10 numéros du Quotidien d’Oran et qui s’inscrivent dans une période qui s’étend de janvier à octobre 2019. Nous nous attachons dans cette présente recherche à analyser une marque linguistique permettant au locuteur-journaliste d’introduire d’une façon explicite ou implicite son point de vue dans l’énoncé tout en exprimant des attitudes envers son énoncé et son interlocuteur. Nous nous inspirons des recherches menées par Vion ( 2001) et Rabatel ( 2003,2004, 2005) et qui consistent à proposer un appareil formel des procédés de l’effacement énonciatif. En s’inscrivant dans cette optique, nous proposons une analyse de l’usage du pronom On dans les articles du Quotidien d’Oran.

2017
Polyphonie argumentative. Étude des variables argumentatives et de la négation dans le discours politique, cas des législatives 2012 en Algérie
La revue : Kiraat
Domaine : Sciences du langage
Mots Clés : polyphonie argumentative, stratégies discursives, surgissements, coïncidences, la situation du discours, l’entourage affectif, variables argumentatifs, le présupposé, le posé, les enchaînements, source d’hypothèses, manœuvres.
Auteur : Diaf Fredj
Issn : 6858-1112 Eissn : vol : revue, Num : 7, pp : 59-80
Résume :

Notre recherche se focalise sur la conception énonciative du sens, cas des slogans engagés dans les législatives 2012, baptisées printemps algérien. C’est précisément une étude sur la polyphonie argumentative articulée par l’activation, d’une part, des variables argumentatives ‘‘mais’’ introduisant la restriction, la précision et la correction et ‘‘pour’’ dans la caractérisation de la notion de changement (conditions et signification). Quant à la négation, elle se considère comme un jugement sur un jugement dans la mesure où une proposition affirmative traduit ce sentiment. Et d’autre part, des fragments tirés des chansons sportives dans la confection des slogans des campagnes électorales. Certes la situation de discours et l’entourage affectif en sont autres mais là le paramètre de la coïncidence intervient pour donner une interprétation de discours. Notre étude a révélé le non-dit à travers le dit.

2010
Structural properties of ternary buffer films based upon CuAlTe2
La revue : JIPMA
Domaine : physique
Mots Clés :
Auteur : K. Benchouk; K. Zamallach; A. Khelil; J.C. Bernede
Issn : Eissn : vol : 13, Num : , pp : 01-04
Résume :

Thin films of CuAlTe2 were elaborated by a sequential deposition of three elements Cu; Al and Te under secondary vacuum on glass slides followed by an annealing of 1/2 hour in an open tube within argon atmosphere. The X-rays diffraction diagram depicts a (112) preferential orientation and the presence of low intensities peaks characterizing the chalcopyrite structure. This shows that the majority of crystallites are directed towards the (112) direction with an orientation factor having an approximate value of 70 %. The height of the crystallites has been assessed using a scanning electron microscope and found to be larger than 200nm.

2015
Indium free and flexible organic solar cells
La revue : Technology Letters
Domaine : physique
Mots Clés : Organic solar cells, Indium free, Flexibility, Electrical modelling.
Auteur : K. El Assad Zemallach Ouari, B. Kouskoussa, M. Makha, K. Benchouk, A. Khelil
Issn : 2348-8131 Eissn : vol : 2, Num : 3, pp : 5-11
Résume :

The energy conversion efficiency of indium free flexible organic solar cells based on simple planar CuPc/C60 heterojunction is studied as a function of the anode free properties. The free indium anode consists in a MoO3/Ag/MoO3 multilayer structure. It is shown that the efficiency of the cells is optimized when the Ag film thickness is increased from 11nm to 17 nm. Moreover the best efficiency are achieved when a double anode buffer layer, Au/CuI is introduced between the MoO3/Ag/MoO3 electrode and the CuPc organic layer. Such behaviours are interpreted with the help of a equivalent electrical circuit of the cells. It is shown that, when deposited onto very thin flexible plastic substrate the properties of the MoO3/Ag/MoO3 electrodes are degraded during the realisation of the cell, which justifies the need of thicker Ag film and of the ultra tin Au film.

2014
Influence of the introduction of MoO3 in the cathode buffer layer on the behaviour of layered organic solar cells.
La revue : Indian Journal of Pure and Applied Physics
Domaine : physique
Mots Clés : Interfaces, organic compounds, oxides, vacuum deposition, ageing, electrical properties.
Auteur : K. El Assad Zemallach Ouari, Z. El Jouad, K. Benchouk, B. Kouskoussa, L. Cattin, M. Makha, A. Khelil, M. Morsli, M. Addou, J.C. Bernède.
Issn : Eissn : vol : 52, Num : , pp : 829-838
Résume :

The behaviour of small-molecule organic solar cells based on coper-phthalocyanine/fullerene with different cathode buffer layer is investigated as a function of air exposure duration. We present the study of the effect of MoO3 on the properties of photovoltaic solar cells (OPVCs) when it is introduced in the cathode buffer layer (CBL). Photovoltaic performances were measured as a function of time of air exposure. During the first days of air exposure the efficiency of the OPVCs with MoO3 in their CBL increases significantly, while it decreases immediately after air exposure in the case of reference OPVCs, i.e. without MoO3 in the CBL. Nevertheless, the lifetime of the OPVCs with MoO3 in their CBL is around 60 days, while it is only 10 days in the case of reference OPVCs. The initial increase of the OPVC with MoO3 in their CBL is attributed to the slow decrease of the work function of MoO3 due to progressive contamination. Then, the progressive degradation of the OPVCs efficiency is due water vapour and oxygen contamination of the organic layers. The use of a double CBL, Alq3/MoO3, allows to interrupt the growth of pinholes, defects and increases the path of permeating gas. Also it can prevent the contamination of the organic layer by Al. All this results in significant increase of the lifetime of the OPVCs

2019
إدارة التنوع الثقافي في منظمات الأعمال الدولية . دراسة حالة شركة زين لاتصالات الخليج.
La revue : مجلة التنمية وإدارة الموارد البشرية
Domaine : Management des ressources humaines.
Mots Clés : التنوع ، إدارة التنوع ، الشركة الدولية ، التدريب الدولي ، شركة زين للاتصالات
Auteur : Assia Hebri.
Issn : Eissn : vol : ?????? 6,, Num : ????? 2, , pp : 133-151
Résume :

تهدف هذه الدراسة إلى إبراز الدور الإستراتيجي لإدارة التنوع الثقافي في الموارد البشرية ، الذي يعد من أكثر المواضيع أهمية و هذا نظرا للقناعة المتزايدة بأهمية إدارة وتنمية التنوع في الموارد البشرية كأحد العناصر العامة والمؤثرة في نجاح تلك المنظمات، مع الإشارة إلى حالة شركة زين للاتصالات التي حققت ميزة تنافسية مهمة في ميدان نشاطها بفضل استقطاب المواهب من مختلف الجنسيات وتطويرها وخلق بيئة عمل مناسبة بالتركيز على النجاعات العملية و ليس الاختلافات التي يمكن التعامل معها بإتباع استراتيجيات مدروسة لإدارة التنوع التي أصبحت من الأعراف الدولية اليومية في أماكن العمل.

2018
Le Programme Des énergies Renouvelables En Algérie,Vers Une Efficacité énergétique D’ici 2030.
La revue : مجلة دفاتر اقتصادية
Domaine : Les énergies renouvelables.
Mots Clés : L’énergie, le programme énergétique, L’efficacité énergétique, Les énergies renouvelables, L’Algérie.
Auteur : Assia Hebri.
Issn : Eissn : vol : ?????? 9, , Num : ????? 1, , pp : ?????? 351-362
Résume :

L’objectif principal de cette étude est de cibler quelques pratiques techniques et économiques utilisées dans le domaine énergétique, selon les capacités énergétiques de l’Algérie, elle s’appuie sur les indicateurs d’efficacité énergétique par grand secteur consommateur d’énergie. Pour maitriser la consommation énergétique et assurer le passage sein et rationnel au domaine des énergies renouvelables. On trouve ici que les piliers de ce passage sont divers et multiples, débutant de l’efficacité des politiques générale de l’énergie, passant par une stratégie seine et fiables pour les indicateurs énergétiques, arrivant au perspectives claires et lignes directrices des stratégies globales de productions et consommation de cette énergie. L’objectif de l’efficacité énergétique consiste à produire les mêmes biens ou services, mais en utilisant le moins d’énergie possible. Le programme algérien comporte des actions qui privilégient le recours aux formes d’énergie les mieux adaptées aux différents usages et nécessitant la modification des comportements et l’amélioration des équipements.

2018
Les Transitions énergétiques Des Pays Méditerranéens;D’ici 2040. Etude Des Scénarios Proposés Par L’observatoire Méditerranéen De L’énergie Ome
La revue : الأفاق للدراسات الإقتصادية
Domaine : Economie de l'energie.
Mots Clés : L’énergie, le programme énergétique, L’efficacité énergétique, Les énergies renouvelables, L’Algérie.
Auteur : Assia Hebri.
Issn : Eissn : vol : ?????? 3,,, Num : ????? 5, pp : ?????? 350-369
Résume :

Cette étude décrit les deux scénarios proposés par l’ Observatoire Méditerranéen de l’énergie (OME) d’ici 2040 , pour la production et la consommation de l’énergie dans les pays de nord et sud méditerranéen , Elle décrit les deux scénarios proposés par l’ Observatoire Méditerranéen de l’énergie (OME) d’ici 2040 , pour la production et la consommation de l’énergie dans les pays de nord et sud méditerranéen , plus les tendances d’efficacité énergétique dans ses pays et donc préciser les points positifs et négatifs des politiques énergétiques utilisés par voie d’analyse, comparaison et de conclusion, ce qui nous permet de saisir un nombre très important des informations utiles à l’illustration des tendances futurs dans le domaine de l’énergie pour ces pays.

2014
Le Rôle De La Responsabilité Sociale Des Entreprises Dans Le Renforcement De Système De Pilotage De L’entreprise: Cas De La Compagnie Pétrolière Sonatrach
La revue : مجلة البحوث الاقتصادية والمالية
Domaine : La responsabilité sociale de l'entreprise.
Mots Clés : Responsabilité sociale des entreprises, partie prenantes, le système de management, Sonatrach, performance globale, système de pilotage
Auteur : Assia Hebri.
Issn : Eissn : vol : ????? 1,, Num : ????? 1, , pp : ????? 25-39
Résume :

La recherche proposée tente d’appréhender l’image de l’entreprise comme le résultat des perceptions et représentations des différentes parties prenantes au sujet du rôle et de l‘impact qu‘exerce l’entreprise sur ces mêmes acteurs et la participation de ses acteurs dans la réalisation de la performance dans leur sens globale. L’hypothèse sous-jacente postule que chaque catégorie d’acteur possède une manière propre d’interpréter les caractéristiques de l’activité en fonction de ses propres contraintes et intérêts. Sur cette base, ces acteurs élaborent une représentation particulière de l’entreprise qu’ils tentent de diffuser afin de rallier d’autres catégories d‘acteurs à leurs points de vue..

2013
إستراتيجية الأمن الصناعي و تسيير الأخطار المهنية في مجمع سوناطراك ( تنافسية نظام الوقاية و مقوماته
La revue : مجلة الباحث الإقتصادي
Domaine : Hygiène et sécurité.
Mots Clés : / سوناطراك/الأخطار المهنية /استثمارات طوير حصة الأمن و السلامة في العمل
Auteur : Assia Hebri.
Issn : Eissn : vol : ?????? 1, , Num : ????? 1, , pp : ?????? 263-297
Résume :

لقد ساهمت الديناميكية العميقة و المنسجمة لمجمع سوناطراك و التي تتضمن إضافات و استثمارات جديدة كل عام في تطوير حصة الأمن و السلامة في العمل خلالها و الاهتمام الكبير بالبيئة . يتضمن هذا البحث إستراتيجية المجمع المبنية على اهتمامه في الفترة الأخيرة بتخفيض منحنيات الكوارث و الحوادث التي تمس مواقع العمل و العمال بها ، فقد حقق المجمع انخفضا في معدلات شدة الإصابة و تكرار الحوادث خلال الفترة الأخيرة و هذا كان بفضل انطلاق العمل بنظام الأمن و الصحة و البيئة، ليعزز السياسة الوقائية بالمجمع ، و هو نظام مؤسس و مهيكل مكن من تحديث و انسجام طرق التسيير في مجال الأمن و هذا ما يشكل إيجابيات لكل عمال المجمع و ما يرسي ثقافة خاصة للأمن داخله.

2015
Le Rôle De La Responsabilité Sociale Des Entreprises Dans La Réalisation De La Performance : Etude Comparative De Sontrach Avec Des Leaders Mondiaux
La revue : مجلة دراسات و أبحاث
Domaine : la responsabilité sociale des entreprises.
Mots Clés : La responsabilité sociale des entreprises, partie prenantes, le système de management , Sonatrach ,performance globale , système de pilotage .
Auteur : Assia Hebri.
Issn : 2253-0363 Eissn : vol : Volume 6, , Num : Numéro 16, , pp : Pages 464-479.
Résume :

Résumé : L objectif de cette étude est de mettre l' accent sur les principes clés des bonnes pratiques de la responsabilité sociale des entreprises et leurs impacts sur la réalisation de sa performances , dans un environnement interne et externe . La mise en place d’un système de management intégré HSE pour le Groupe Sonatrach constitue une priorité absolue du management à différents niveaux. Il s’agit par cette action de mettre en œuvre les engagements de la politique HSE du Groupe. Le processus, déjà entamé, permettra une meilleure évaluation des Performances HSE du Groupe ; et un niveau de comparaison universel .

2013
LE ROLE DE LA RESPONSABILITE SOCIALE DES ENTREPRISES DANS LA REALISATION DE LA PERFORMANCE : ETUDE PAR QUESTIONNAIRE DE LA RSE AU SEIN DE SONATRACH
La revue : Valahian Journal of Economic Studies
Domaine : la responsabilité sociale des entreprises.
Mots Clés : responsabilité sociale des entreprises, partie prenantes, le système de management, Sonatrach, performance globale, système de pilotage
Auteur : Assia Hebri.
Issn : 2067 - 9459 Eissn : vol : , Num : 02 / 2013 , pp : 79-86
Résume :

La réalisation de la performance globale d’une entreprise, résulte de l’état d‘un rapport de force entre différentes manières de présenter et se représenter la place de l‘entreprise sur diverses échelles d’évaluation propres à chaque groupe d‘acteurs. La première étape dans l’opérationnalisation de cette approche par les parties prenantes consiste à identifier les différentes catégories d’acteurs à prendre en compte dans l’analyse. On va donc regroupé ses parties prenantes, dans les six grandes catégories influents sur la réalisation de la performance de l’entreprise étudié, ils sont: les clients, la communauté locale et la société civile, les fournisseurs, l’environnement, la flexibilité organisationnelle et l’adaptation au changement, les employés

2017
 آليات حماية فئة المسنين من جرائم الأسرة في التشريع الجزائري
La revue : FSM ILMI ARASTIRMALAR lnsan ve.Toplum Bilimleri Dergisi
Domaine : القانون
Mots Clés : المسننين-الرعاية المؤسساتية-الحق في النفقة-دعم البقاء في الوسط الاسري
Auteur :
Issn : 2147-3153 Eissn : 2148-2217 vol : , Num : 09, pp : 1-28
Résume :

تقوم السياسة الإجتماعية في الجزائر على مبادئ قارة منطلقها تكفل الدولة بكل أفراد المجتمع مع إعتبار الأسرة الأساس الذي ينبني عليه هذا التكــــفل، هــــذا الأخير يتخذ أشكالا مختلفة، تتعد بتعدد الأفراد المكونين لها و الذين يشكلون خارج الأسرة ما يعرف بالفئات الخاصة كالأطفال ، النساء، و المسنين و بربط هذه الفئات بالأسرة و بالجرائم التي أصبحت تقع داخلها تتأكد ضرورة إعتماد آليات فعالة للحماية عندما تكون الفئة المستهدفة هي فئة الأصول لتتضاعف ضرورات الحماية أكثر عندما يتعلق الأمر بالأصول المسنين، ما يجعل آليات الحماية تتنوع بين الآليات الإجتماعية و الآليات الجزائية. ÖZET Cezayir’de, toplumsal siyaset, toplumun bütün fertlerinin sorumluluklarını üstlenen yerleşik prensipler üzerine kuruludur. Bu prensipler bu sorumlulukları üstlenirken aileyi de temel olarak kabul etmektedir. Aile kurumu kendisini oluşturan fertlerin ve toplumda aile dışında bulunan özel kesimlerin –ki bunlar çocuklar, kadınlar ve yaşlılar olarak değerlendirilir- çeşitliliğine göre farklılık gösterir. Bu grupların aileyle ilişkilendirilmesi ve aile içinde işlenen suçların da göz önünde bulundurulmasıyla hedeflenen kitle bu temel kitle olunca ve durum yaşlıları da ilgilendirince yaşlı fertlerin korunmasındaki etkili tedbirlerin bulunmasının zorunluluğu daha da artmakta ve bu koruyucu tedbirler toplumsal tedbirler ve cezaî tedbirler olarak çeşitlilik göstermektedir Abstract The social policy in Algeria is built on solid principles, which state ensure all members of the community with the consideration of family foundation upon which the latter provide various forms, include a wide range of components individuals which form outside the family what is known as special categories, such as children, women, the elderly and linking these categories to the family and the crimes that happens inside. Therefore it is confirmed the need to adopt effective mechanisms of protection when the target category is the asset class to multiply the needs of protection more when it comes to aging assets, making protection mechanisms, ranging from social and penal mechanisms.

2019
الإطار القانوني للمؤسسة العمومية في الجزائر كعون اقتصادي
La revue : جامعة الشارقة للعلوم القانونية
Domaine : القانون
Mots Clés : المؤسسة العمومية-المرفق العام- العون الاقتصادي
Auteur :
Issn : Eissn : 2616-6526 vol : 16, Num : 01, pp :
Résume :

تسعى الجزائر كدولة يعيش اقتصادها مرحلته الانتقالية ، إيجاد حلول وسط تمكّنها من تفعيل المبادئ الأساسية لاقتصاد السوق ،بعد ضبط الآليات التي تكرّس الدور التنظيمي و الرقابي للدولة في المجال الإقتصادي. تعتبر المؤسسة العمومية بمفاهيمها المختلفة أحد أهمّ صور تدخل الدولة في المجال الإقتصادي. ترتبط دراسة المؤسسة العامة من الناحية القانونية ارتباطا و ثيقا بالنظرية التقليدية للمرفق العام و القانون الإداري ، لذلك فمن البديهي أن يؤدي تحوّل هذه النظرية – تحديثها – إلى تحوّل في الطبيعة القانونية للمؤسسة العامة و في طبيعة الوظائف التي تؤديها و التي ترتبط في جزء منها بإدارة المرافق العامة الإقتصادية . و من هذا المنطلق جاءت إشكالية الورقة المقدمة، للبحث في مدى ملائمة الإطار القانوني للمؤسسة العمومية الإقتصادية تحديدا لمبادئ و قواعد اقتصاد السوق و للآليات المختلفة التي تدار بها المرافق العامة الإقتصادية . Abstract: As a country whose economy is in transition, Algeria seeks to find solutions that help it to activate the basic principles of the market economy, without ignoring its significant role as a joint economic participant, after the organization of the mechanisms that devote the regulatory role of the state in the economic sector and the public institution in its different concepts, the role of the intervening participant and the officer emerge. The public institution is adopted by Algeria as well as other countries, in order to avoid misadministration and administrative routine, as it is considered a tool of economic planning. In this sense, the problematic presented this paper was to examine the appropriateness of the legal framework of the public economic institution specifically to the principles and rules of the market economy and to the different mechanisms in which the economic utilities are managed

2018
 المراقبة الادارية في مجال الضمان الاجتماعي
La revue : مجلة دراسات ةأبحاث
Domaine : القانون
Mots Clés : المراقبة الميدانية- المراقبة المحاسباتية- مراقب الضمان الإجتماعي – المؤمن له إجتماعيا-المكلف
Auteur :
Issn : 1112-9751 Eissn : 2253-0363 vol : 10 , Num : 03, pp : 270-302
Résume :

تقتضي ضرورة التطبيق السليم لتشريع الضمان الاجتماعي، ضمان المراقبة المستمرة لمختلف أحكامه ،حيث تعتبر المراقبة الإدارية في مجال الضمان الاجتماعي أهم الآليات التي تساهم في ضمان ديمومة المنظومة وتأديتها لمختلف وظائفها . تمحورت إشكالية الورقة البحثية حول البحث في حدود مساهمة المراقبة الإدارية في المحافظة على ديمومة منظومة الضمان الاجتماعي ، الإجابة التي إستدعت ضرورة التدقيق في ماهية المراقبة الإدارية، بغية حصر أهم أثارها بالتبعية بعد تحديد مضمونها و الفئات المشمولة بها Abstract: The need for proper application of the social security legislation, requires to ensure the continuous monitoring of the various provisions. Therefore, administrative control is considered in the area of social security the most important mechanisms that contribute to ensure the sustainability of the organization and performing its various functions.

2019
 تنظيم الضمان الاجتماعي في دول المغرب العربي،دراسة مقارنة بين الجزائر والمغرب
La revue : مجلة المعيار
Domaine : القانون
Mots Clés : الحماية الإجتماعية - هياكل الضمان الإجتماعي - - مبدأ التوحيد- النظام الإجباري- الأنظمة التكميلية
Auteur :
Issn : Eissn : 2588-2384 vol : 32, Num : 03, pp : 562-589
Résume :

يعتبر الحق في الضمان الاجتماعي من الحقوق التي كرّستها دساتير مختلف الدول ،حيث إنبثق هذا التكريس من المواثيق والإعلانات الدولية المختلفة لاسيما المادة 22 من الإعلان العالمي لحقوق الإنسان، و التي نصت على أن:" كل شخص باعتباره عضوًا في المجتمع، له الحق في الضمان الاجتماعي " و إذا كان الإعتراف بالضمان الاجتماعي كنظام كامل متكامل هو القاسم المشترك لمختلف الدول على إختلاف أنظمتها السياسية و توجّهاتها الإقتصادية ، إلا أن الإختلاف يكمن في طريقة تجسيده و الهيئات المشرفة على تنفيذه و طريقة تمويله و من ثمة كيفية توزيع مداخيله، أما عن المخاطر التي يغطيها فهي لا تخرج عن تطبيق مقتضيات الإتفاقية الدولية رقم 102. تهدف الورقة العلمية المقدمة إلى إجراء دراسة مقارنة حول كيفية تطوّر تنظيم أنظمة الضمان الإجتماعي في كل من الجزائر والمغرب ، بغية معرفة طبيعة منظومة الضمان الاجتماعي في كل دولة و العوامل التي ساهمت في تحديدها بالتبعية ،كما تقتصر الدراسة على الجزائر و المغرب لتباين و إختلاف أنظمة الضمان الاجتماعي المطبقة في كل منهما. Abstract: The right to social security is one of the rights enshrined in the constitutions of the different States. This commitment stems from various international conventions and declarations, in particular article 22 of the Universal Declaration of Human Rights, which states: "Everyone, as a member of society, has the right to social security and is entitled to realization,..". If the recognition of social security as a complete integrated system is the common denominator of different states on the difference of their political systems and economic orientations, this difference lies in the manner of its embodiment and the bodies supervising its implementation and the manner of financing it and it is how to allocate its income, and the risks covered by it does not go to the application of the provisions of Convention no. 102. The paper aims to conduct a comparative study on how the organization of social security systems in Algeria and Morocco has evolved in order to know the nature of the social security system in each state and the factors that contributed to its subsequent identification, as the study on Algeria and Morocco are limited to security systems variation and difference social aspects of each

2019
وكالات الاستخدام الخاصة -دراسة للنظام القانوني للهيئات الخاصة للتنصيب في الجزائر
La revue :
Domaine : القانون
Mots Clés : سوق الشغل- مرفق التنصيب- الإتفاقية الدولية رقم 181 - عروض العمل- طلبات العمل-ضبط سوق العمل- الوكالة الوطنية للتشغيل- الهيئات الخاصة للتنصيب.
Auteur :
Issn : Eissn : 2600-6952 vol : 33, Num : 04, pp : 121-153
Résume :

لم يمانع المشرع الجزائري من فتح الوساطة في التشغيل لأشخاص القانون الخاص طبيعيين ومعنويين ،لكنه حصر مشاركتهم في تسجيل العمال،إنتقائهم،وتقديمهم للهيئات المستخدمة قصد تنصيبهم ومن دون الإخلال بالإعتراف لهم بالبحث عن عروض العمل وجمعها وتوزيعها وهو ما يعني أنّه حصر مهمتهم في الوساطة في التنصيب، ما جعله يسمي الأشخاص التي تتولى هذه المهمة بالهيئات الخاصة للتنصيب بدل وكالات الإستخدام الخاصة وفق ما حددته منظمة العمل الدولية. تتناول الورقة البحتية المقدّمة تحديدا لماهية وكالات الإستخدام الخاصة والشكل الذي اختار المشرع الجزائري أن تظهر به أو ما يعرف بهيئات التنصيب الخاصة كاستجابة لتحرير الوساطة في التشغيل،من خلال إعادة النظر في آليات ضبط سوق العمل وتنظيمه ،لتنتقل الوساطة في التشغيل من الإحتكار الكلي للوكالة الوطنية للتشغيل إلى المشاركة المقيّدة لوكالات الإستخدام الخاصة. ABSTRACT The Algerian legislator did not object to the opening of employment mediation to private law persons; however, he limited their participation in the registration, selection and submission of workers to the bodies used for their inauguration without prejudice to their recognition of the search, collection and distribution of work. , which means that inventory their mission on mediation at the inauguration, who undertake this task to the private bodies for installation, instead of private employment agencies as defined by the International Labor Organization. This paper deals with the specific nature of the private employment agencies and the form in which the Algerian legislator chose to be represented by the so-called private instigators, with the aim of liberalizing employment mediation, by revising the mechanisms of regulating and regulating the labor market, in order to restrict participation of private use agencies

-0001
Semi-Blind Estimation of CFO and Channels for STBC-OFDM System
La revue : International Journal of Computer Aided Engineering and Technology
Domaine : Telecommunications
Mots Clés : Estimation CFO
Auteur : Mokhtar Besseghier; Djebbar Ahmed Bouzidi
Issn : 1757-2665 Eissn : 1757-2657 vol : , Num : , pp :
Résume :

Space Time Block Coding-Orthogonal Frequency Division Multiplexing (STBC-OFDM) based MIMO (Multi Input Multi Output) system has been shown to be robust against non ideal operating conditions such as antenna correlation, channel estimation errors, and Doppler effects. But, the later suffers from carrier frequency offset (CFO) which makes channels estimation more challenging.rnIn this paper, we propose joint semi-blind CFO and channels estimators based on modified- multiple signal classification (M-MUSIC) algorithm for STBC-OFDM system over MIMO channels. Channels state information can be estimated at the receiver using pilot symbols embedded in each transmission block. To this end, we propose to encode pilot symbols by a Specific Space-Time Block Coder (S-STBC) while information symbols are encoded by Alamouti based space-time block coding (A-STBC). MUSIC based estimation algorithms are characterized by a high computational complexity. To overcome this drawback, we derive an iterative algorithm which leads to low complexity, high performance CFO and channels estimation. The performance of our algorithms is compared with existing approach by simulations.

2020
Novel Blind CFO Estimation Method for OFDM/OQAM System
La revue : IEEE Communications Letters
Domaine : Telecommunications
Mots Clés : OFDM/OQAM Estimation CFO
Auteur : Mokhtar Besseghier; Djebbar Ahmed Bouzidi
Issn : 1089-7798 Eissn : 1558-2558 vol : 24, Num : 7, pp : 1451 - 1454
Résume :

To solve the performance degradation due to Carrier Frequency Offset (CFO) for OFDM/OQAM system, a new blind CFO estimation method is proposed in this letter. This method uses the header structure of the transmitted signal by considering that there is an OFDM/OQAM symbol of null-valued OQAM symbols before the first one and exploits the orthogonality among subcarriers as well as the orthogonality between synthesis and analysis filter banks to estimate the CFO. Therefore, without compromising the spectral efficiency of OFDM/OQAM system this method can estimate accurately the CFO. Simulation results illustrate the effectiveness of the proposed method.

2020
أثر تغيرات بيئة الأعمال على نشاط الشركات العائلية . - دراسة تحليلية لمقياس الأعمال السنوي للشركات العائلية الأوربية 2017 –
La revue : Beam Journal of economic studies
Domaine : Management international
Mots Clés : : مناخ الأعمال ، الشركات العائلية الأوربية ، النجاعة ، البارومتر السنوي 2017 ، الإبداع والتطوير .
Auteur : Assia Hebri.
Issn : 2661-779X Eissn : vol : 04, Num : 01, pp : 274-285.
Résume :

تهدف هذه الدراسة إلى تحليل الأثر الكبير الذي تحدثه التفاعلات العامة والخاصة للشركات العائلية مهما كان حجمها ونشاطها مع مناخ الأعمال السائد في موقعها الجغرافي و تفاعلها مع بيئتها الداخلية والخارجية ومسؤوليتها اتجاه الأطراف أصحاب المصلحة - أكد الاستبيان السنوي لعام 2017 من إعداد الفدرالية الأوربية للشركات العائلية EBF ومجموعة مستشاري شركة مرافقة الأعمال العائلية KPMG ، بعد أن حقق نسبة أكثر من 1100 إجابة من مالكي الشركات العائلية في كل مكان في أوروبا لسنة 2017، على قوة روابط الشركات العائلية الأوربية على الرغم من التحديات التي تواجهها يوميا وإعادة استثمار أرباحهم والبحث عن الجديد و الفرص التطويرية التي تسمح لهم بخلق ظروف ملائمة للنمو المستدام لشركاتهم .

2020
La Comptabilité Des Ressources Humaines Un Outil - De L’audit Social. Cas Du Groupe Chiali Filiale Tubes - Sidi Bel Abbes – Algérie-.
La revue : مجلة دراسات متقدمة في المالية والمحاسبة
Domaine : Management des ressources humaines.
Mots Clés : la comptabilité des ressources humaines, outils de l’audit social, la gestion des RH, la performance du capital humain, Indicateurs.
Auteur : Assia Hebri / Khelil Sara.
Issn : 2661-7374 Eissn : vol : 03, Num : 05, pp : 57-69.
Résume :

L’objectif de cette recherche, était de déterminer les outils de l’audit social dans la filiale de Tube, groupe Chiali sidi BelAbes, Algérie. Après une analyse d’un échantillon de charges du personnel sous forme l’indicateurs ratios, et de diagrammes et par l’utilisation d’un questionnaire sur les méthodes de calcul des salaires et la politique de rémunération, on a constaté qu’Il ya une absence d’un système d’évaluation des connaissances dans la rémunération du personnel.

2020
Transient Numerical Analysis of Free Convection in Cylindrical Enclosure
La revue : MATEC Web of Conferences
Domaine : energy
Mots Clés : Computational fluid mechanics; Coupled Natural convection with Surface radiation; Finite Volume Method; Partially Annular; Nusselt Number
Auteur : Mohamed Amine Medebber, Nourddine Retiel, belkacem Ould said, Abderrahmane Aissa, and Mohammed El Ganaoui
Issn : Eissn : 2261-236X vol : 307, Num : 01029 (2020), pp :
Résume :

A transient two dimensional study of free convection in a vertical cylinder partially annulus is conducted numerically. Uniform temperature is imposed cross a vertical wall, while the top and bottom walls are adiabatic. The governing equations are solved numerically by using a finite volume method. The coupling between the continuity and momentum equations is effected using the SIMPLER algorithm. Solutions have been obtained for Prandtl numbers equal to 7.0, Rayleigh numbers of 103 to 106 and height ratios 0.5. The influence of physical and geometrical parameters on the isotherms, velocity fields, average Nusselt has been numerically investigated.

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A fuzzy goal programming with interval target model and its application to the decision problem of renewable energy planning
La revue : Environmental and Ecological Statistics
Domaine :
Mots Clés :
Auteur : Amin. Hocine, Mohammed Seghir. Guellil, Eyup. Dogan, Samir. Ghouali, Noureddine. Kouaissah
Issn : Eissn : 1573-3009 vol : , Num : , pp :
Résume :

Optimizing sustainable renewable energy portfolios is one of the most complicated decision making problems in energy policy planning. This process involves meeting the decision maker’s preferences, which can be uncertain, while considering several conflicting criteria, such as environmental, societal, and economic impact. In this paper, rather than using existing techniques, a novel multi-objective decision making (MODM) model, named fuzzy goal programming with interval target (FGP-IT), is proposed and constructed based on recent developments and concepts in fuzzy goal programming (FGP) and revised multi-choice goal programming (RMCGP). The model deals with decision making problems involving a high level of uncertainty by offering decision makers a more flexible way to formulate and express their preferences, namely, fuzzy interval target goals. The proposed method is used to optimize a hypothetical sustainable wind energy portfolio in Algeria. The results show that the FGP-IT model is capable of assisting decision makers with uncertain preferences in making such complicated decisions.

-0001
Erbium/Ytterbium-Doped Waveguide Amplifier (EYDWA) for extended reach of Wavelength Division Multiplexing based free space optics system (WDM/FSO)
La revue : Journal of Optical Communications
Domaine :
Mots Clés :
Auteur : Attaouia. Bentahar, Malika. Kandouci, Samir. Ghouali
Issn : Eissn : vol : , Num : , pp :
Résume :

This work is focused to carry out the investigation of wavelength division multiplexing (WDM) approach on free space optical (FSO) transmission systems using Erbium Ytterbium Doped Waveguide Amplifier (EYDWA) integrated as post-or pre-amplifier for extending the reach to 30 Km for the cost-effective implementation of FSO system considering weather conditions. Furthermore, the performance of proposed FSO-wavelength division multiplexing (WDM) system is also evaluated on the effect of varying the FSO range and results are reported in terms of Q factor, BER, and eye diagrams. It has been found that, under clear rain the post-amplification was performed and was able to reach transmission distance over 27 Km, whereas, the FSO distance has been limited at 19.5 Km by using pre-amplification.

2020
On The Structure Of Powers Of Toeplitz Matrices
La revue : Applied Mathematics E-Notes (AMEN)
Domaine : Mathématiques Mathematics Subject ClassiÖcations: 20F05, 20F10, 20F55, 68Q42.
Mots Clés :
Auteur : T.M. Mohamed, K. Ismaiel, S. Abderrahmane.
Issn : 1607-2510 Eissn : vol : 20(2020), Num : , pp : 199-203
Résume :

A finite Toeplitz matrix T is normal if and only if it is a rotation and a translation of a Hermitian Toeplitz matrix (Type I) or it is a generalised circulant (Type II). In this paper, we show that the powers of a Type II matrix T are also Type II.

2020
The square root of tridiagonal Toeplitz matrices.
La revue : International Journal of Advanced and Applied Scienses (IJAAS)
Domaine : Mathématiques.
Mots Clés : Tridiagonal Toeplitz matrix, square root, persymmetric matrix, eigenvalue.
Auteur : K. Ismaiel, T.M. Mohamed, S. Abderrahmane.
Issn : 2313-626X Eissn : vol : 7(2020)(7), Num : 7, pp : 92-94
Résume :

In this paper, we present an explicit formula to find square roots of a tridiagonal Toeplitz matrix, and we show that these square roots have the form of a persymmetric matrix with examples to illustrate.

2019
Robust neuro-fuzzy sliding mode control with extended state observer for an electric drive system
La revue : Energy
Domaine : Electrical Engineering
Mots Clés : Electric vehicleDynamicPMSMNeuro-fuzzy sliding mode controlExtended state observer ESO
Auteur : I. F.Bouguenna, A.Azaiz, A. Tahour
Issn : 0360-5442 Eissn : vol : 169, Num : 169, pp : 1054-1063
Résume :

The choice of the control techniques has a positive impact on the traction chain particularly disturbance rejection ability and the energy management in the electric vehicle (electric motor, inverter, transmission, ect.). In this paper, a robust neuro-fuzzy-sliding mode control (RNFSMC) with extended state observer (ESO) technique is applied on the traction chain of the electric vehicle (Permanent magnet synchronous motor PMSM, Inverter, Transmission). However, most of the existing strategies of control that are applied on the traction chain lead to chattering phenomena, reducing the electric motor performance and disturbance rejection ability without forgetting the bad energy management on board the electric vehicle. To further enhance the performance of the traction chain, a hybrid control scheme is used to severally decrease the chattering phenomena in the PMSM electric motor and evolve the disturbance rejection ability which employs two types of controllers: Neuro-fuzzy sliding mode control on the direct current loop and ESO controller on both speed, and quadrature current loops taking into account the dynamic of the vehicle. Simulations by Matlab/Simulink are used to indicate the validity of the planed scheme on the closed-loop system. The simulation results show the effectiveness of the proposed control strategy with desired tracking accuracy.

2018
Electronic Differential and Neuro-Fuzzy Sliding Mode Control with Extended State Observer for an Electric Vehicle System
La revue : E3S Web Conf.
Domaine : Electrical Engineering
Mots Clés : Electric vehicleDynamicPMSMNeuro-fuzzy sliding mode controlExtended state observer ESO
Auteur : I. F.Bouguenna, A.Azaiz, A. Tahour
Issn : Eissn : 2267-1242 vol : 61, Num : 7, pp :
Résume :

In this paper a neuro-fuzzy-sliding mode control (NFSMC) with extended state observer (ESO) technique; is designed to guarantee the traction of an electric vehicle with two distinct permanent magnet synchronous motor (PMSM). Each PMSM systems (source-convertermotor) are attached to an electronic differential (ED), in order to adjust the senses of direction of the vehicle, and sustain a stable speed by adapting the difference in velocity of each motor-wheel according to the direction in the case of a turn. Two types of controllers are employed by a hybrid control scheme to assure the control and the performance of the vehicle. This hybrid control scheme guarantees the stability of the vehicle by ED, reduces the chattering phenomena in the PMSM electric motor, and improves the disturbance rejection ability which employs tow types of controllers. The neuro-fuzzy sliding mode control on the direct current loop and ESO controller on the speed loop, and the quadratic current loop; taking into account the dynamic of the vehicle. Simulation runs under Matlab/Simulink to assess the efficiency, and strength of the recommended control method on the closed loop system.

2017
Hybrid Fuzzy Sliding Mode Speed Control for an Electric Vehicle Drive
La revue : International Journal of Power Electronics and Drive System (IJPEDS)
Domaine : Electrical Engineering
Mots Clés : Dynamics Electric vehicle Fuzzy sliding PMSM Sliding mode control
Auteur : I. F.Bouguenna, A.Azaiz, A. Tahour
Issn : 2088-8694 Eissn : vol : 8, Num : 3, pp : 1050-1061
Résume :

This paper present a speed hybrid fuzzy-sliding mode control (HFSMC) of a permanent magnet synchronous motor (PMSM) to ensure the traction of an electric vehicle; at the first we applied the sliding mode control (SMC) with three surfaces on the PMSM by taking into account the dynamics of the vehicle; And afterwards we applied the fuzzy-sliding mode in which the surface of the speed is replaced by a Fuzzy-PI controller; Simulation under Matlab/Simulink has been carried out to evaluate the efficiency and robustness of the proposed control on a system drive. It should be noted that the reference speed is the European urban driving schedule ECE-15 cycle.

2020
Étude numérique du couplage de la convection libre avec le transfert de masse dans une cavité cylindrique verticale annulaire
La revue : R E C U E I L D E M É C A N I Q U E
Domaine : transfer de chaleur et masse
Mots Clés : heat transfer and mass
Auteur : Mohamed Amine MEDEBBER, Noureddine RETIEL, Belkacem OULD SAID
Issn : Eissn : vol : 05, Num : 01, pp : 4 3 0 – 4 3 9
Résume :

This study concerns the two-dimensional numerical simulation of the double diffusive convection in cylindrical vertical annular cavity. The vertical walls are maintained at different uniform temperatures and concentration. The governing equations are solved numerically using the finite volume method. The coupling between the continuity and momentum equations is effected using the SIMPLER algorithm. Numerical analysis has been carried out for a wide range of the buoyancy ratio (N=0.8 and 1.3). The influence of the buoyancy ratio (N) parameters on the streamlines, isotherms, isoconcentration, average Nusselt number and Sherwood numbers has been numerically investigated in detail.

2020
Boosting a Reference Model-Based Controller Using Active Disturbance Rejection Principle for 3D Trajectory Tracking of Quadrotors: Experimental Validation
La revue : Journal of Intelligent & Robotic Systems
Domaine : Techenologie
Mots Clés : Reference model-based control Nonlinear control Robust Control IDA-PBC ADRC ESO Quadrotor
Auteur : Yasser Bouzid, Mehdi Zareb, Houria Siguerdidjane, Mohamed Guiatni
Issn : 0921-0296 Eissn : 1573-0409 vol : 100, Num : 1, pp : 597–614
Résume :

It is relevant to develop an adequate control algorithm for quadrotors that guarantees a good compromise robustness/ performance. This compromise should be ensured with or without external disturbances. In this paper, we investigate and apply a revisited formulation of a reference model-based control strategy by introducing a boosting mechanism. This mechanism uses an Extended State-based Observer (ESO) to estimate the uncertainties and variety of disturbances. The estimation is continually updated and rejected from the main control loop. The reinforcement principle is inspired from the popular Active Disturbance Rejection Control (ADRC) technique in order to enhance the robustness ability of a nonlinear reference model-based control strategy (i.e. Interconnection and Damping Assignment-Passivity Based Control (IDA-PBC)). The obtained controller is augmented by an additional input, which is derived via sliding modes framework to handle the estimation errors and ensure asymptotic stability. This combination leads to promising results by improving the nominal control technique. The primary results are shown through numerical simulations and are confirmed, experimentally, with several scenarios.

2020
Collaborative Strategy for Teaching and Learning Object-Oriented Programming Course: A Case Study at Mostafa Stambouli Mascara University, Algeria
La revue : Informatica
Domaine : informatique
Mots Clés : University Teaching Strategies, Oriented-Object Programming, Collaborative Learning,
Auteur : C Boudia, A Bengueddach, H Haffaf
Issn : 1854-3871, 0350-5596 Eissn : vol : 43, Num : 1, pp : 129–144
Résume :

Several strategies and methods have been designed and tested to allow students to have better teaching and learning of programming concepts and training their programming skills acquired. In our university, old and classic pedagogical methods are still used in the learning of Oriented-Object Programming (OOP). This paper explores the experimentation of a pedagogical approach designed for Mostafa Stambouli Mascara University’s computer sciences students to enhance their chances to get an effective teaching using a collaborative learning and early introduction of current technologies. The study was made of 108 second year informatics students’ for two semesters (October–January 2016- 2017, September-December 2017-2018) who were identified in a controlled experience for collaborative learning OOP in lab session. Students gathered into predetermined groups based on initial test and some setting. The students are supposed to share the same programming assignment by distributing roles according to global pedagogical scenario for problem-resolving activities. This experience allows the teachers to apply this strategy and see students in closer and permit them to express their problems and search together for solutions. The principal objective was to offer a new experience to motivate students and make this design a smart opportunity to have better programming performance. Furthermore, as a result of testing this new strategy, the students’ academic progress is clear. A questionnaire was distributed with the purpose of analyzing students’ motivation and satisfaction levels alongside the effects of the experiment. Results show that students found that among other benefits this method facilitates the learning process.

2020
Towards cloud transport using IP-multiservices access network (MSAN)
La revue : Journal of Optical Communications
Domaine :
Mots Clés : ACWKC; C300M shelf; CICK; cloud; GUSQ; IP-MSAN; optical infrastructures
Auteur : Amina Elbatoul. Dinar Samir. Ghouali Rachid. Merzougui Attaouia. Bentahar Boualem. Merabet
Issn : 2191-6322 Eissn : vol : , Num : , pp :
Page web de l'auteur

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Looking over the Horizon 2030: Efficiency of Renewable Energy Base Plants in Algeria Using Fuzzy Goal Programming
La revue :
Domaine :
Mots Clés :
Auteur : Samir. Ghouali Mohammed Seghir. Guellil Mostéfa. Belmokaddem
Issn : Eissn : vol : , Num : , pp : 329-337
Résume :

Renewable energy shapes have been broadly utilized in the previous decades, featuring a Green move in energy production. A genuine explanation for this swing to Renewable energy generation is internationals directives, which set the worldwide objectives for energy production from inexhaustible sources, greenhouse gas emissions and increase in energy efficiency. The ability expansion-planning problem of the renewable energy industry implies some important decisions concerning the optimal mix of different plant types, locations where each plant should be built, and capacity extension decisions over the planning horizon for each plant. The aim of this paper is to analyse the relationship between the type of renewable energy by combining the geographical, climatic and ecological criteria, in the Algerian framework, using a multi criteria analysis, precisely Fuzzy Goal Programming model, based on a multi-source, multi-sink network, in order to determine the optimal number of renewable energy plants for electric generation in the Algerian territory.

2020
NTP Server Clock Adjustment with Chrony
La revue :
Domaine :
Mots Clés :
Auteur : Amina Elbatoul. Dinar Boualem. Merabet Samir. Ghouali
Issn : Eissn : vol : , Num : , pp :
Résume :

As of now, all servers have an equipment or programming clock to which reference is made to time stamp records, exchanges, messages, and so forth. This clock, albeit structured around a quartz oscillator, floats like any customary watch, which implies this common watch cannot a match to such created machines that are networked and share common resources like file systems. For example, UNIX is a development tool which makes command, based on its work on comparing file modification dates. Similarly, the correlation of log messages from several systems becomes very difficult if they are not at the same time. In this article, we will concentrate on this topic by designing a server utilizing the NTP convention since the primary “focus” of the NTP usage is UNIX frameworks, and to be more explicit, we will see the management of the NTP server with the Chrony tool.

2020
Prospective Analysis for a Long-Term Optimal Labor Force Planning in Algeria (PALOLFA)
La revue :
Domaine :
Mots Clés : Sustainability GDP Energy consumption Goal programming model Work force Environment
Auteur : MS. Guellil S. Ghouali O. Khedir D. Benabou H. Ayad SE. Sari-Hassoun
Issn : Eissn : vol : , Num : , pp :
Résume :

Objective programming models propose an explanatory framework to look at multi-criteria issues, including a couple of clashing targets. Genuine issues regularly include uncertain data, which makes weighted objective programming (WGP) models the most appealing decision. This article offers a WGP model that consolidates ideal resource distribution to simultaneously satisfy planned objectives on economic improvement, vitality utilization, workforce, and ozone-depleting substance (GHG) emanation decrease associated with key financial areas of Algeria. The model offers significant encounters to chiefs for fundamental arranging and adventure portions towards doable progression. We exhibit the authenticity and substantiality of the model through a numerical case.

2020
Packet Synchronization in a Network Time Protocol Server and ASTM Elecsys Packets During Detection for Cancer with Optical DNA Biochip
La revue :
Domaine :
Mots Clés : ASTM Elecsys NTP Optical DNA biochip UNIX
Auteur : Amina Elbatoul. Dinar Samir. Ghouali Boualem. Merabet Mohammed. Feham
Issn : Eissn : vol : , Num : , pp : 89-101
Résume :

DNA biochip technology (especially in the optical field) can study a large amount of nucleic acid records at high throughput. It makes viable the simultaneous scrutiny of quite a few of tens of thousands of genes belonging to a healthy or diseased biological sample in terms of its genome (DNA). This article overviews optical DNA biochips as well as the Network Time Protocol (NTP) protocol deployment for synchronization among the collection database and the optical biochip automaton via the ASTM Elecsys protocol for better real-time detection with diagnosis of genetically mutated cancer. The present study utilizes the UNIX Server platform and NTP to synchronize communication between servers and optical DNA. Section 7.4 brings in automates.

2021
Numerical Study of Combined Surface Radiation and Natural Convection in Vertical Conical Annular Enclosure
La revue : Defect and Diffusion Forum
Domaine : heat and mass transfer
Mots Clés : Natural Convection; Surface Radiation; Finite Volume Method; Coaxial Conical Cavity
Auteur : Mohamed A MEDEBBER1, Belkacem OULD SAID2, Noureddine Retiel
Issn : 1662-9507 Eissn : vol : 408, Num : , pp : pp 19-32
Résume :

The present study investigates the combined free convection and surface radiation in a conical annular cylinder filled with air (Pr=0.71). The steady-state continuity, Navier–Stokes and energy equations were carried out by the finite volume method, and the Discrete Ordinates Method (DOM) was used to solve the radiative heat transfer equation (RTE). The boundary conditions are such that the inner and the outer radius of cone are maintained at hot (Th) and cold (Tc) isothermal temperature. The horizontal upper and lower walls are assumed to be isolated. Concerning the radiation exchange, we consider that the fluid (air) is transparent, so only the solid surfaces contribute to the radiation exchange and assumed to be diffuse-gray. The computations are performed for Rayleigh number (Ra) in the range 103≤Ra≤106, the surface emissivity (ε) 0≤ε≤1 and the cone angle (????????) 63º, 76º, 80º and 84º. The key parameters for this analysis are considered as Rayleigh number (Ra), surface emissivity (ε) and the cone angle (????????). Results are presented in terms of isotherms, streamlines and the average Nusselt numbers.

2021
منهجية إعداد السياسات العامة في إطار إعداد إستراتيجية التنوع البيولوجي،قراءة في الإستراتيجية الجزائرية للتنوع البيولوجي للفترة(2016-2030). Methodology For Preparing Public Policies In Preparing The Biodiversity Strategy, Read On The Algerian Biodiversity Strategy(2016-2030)
La revue : مجلة الإستراتيجية و التنمية
Domaine : Environment
Mots Clés : لتنوع البيولوجي،الخطط القطاعية،الإستراتيجية الجزائرية،الإستدامة،الجزائر. ; Keywords:Biodiversity, Sectoral Plans,Algerian Strategy,sustainability,Algeria
Auteur : Assia Hebri.
Issn : Eissn : 2600-6839 vol : Volume 11,, Num : Numéro 3, pp : , Pages 349-366
Résume :

تقوم الدراسة التالية على إبراز ضرورة إدماج الاستدامة في إعداد السياسات العامة التي تظهر جليا في الخطط الفصلية والسنوية لجميع القطاعات ضمن الإستراتيجية الجزائرية للتنوع البيولوجي(2016-2030). تحقيقا لأهداف أيشي للتنوع البيولوجي في مشروع الإستراتيجية المقترح للفترة المدروسة ،تؤكد الدراسة على ضرورة حوكمة التنفيذ القائم على التنسيق والتكامل بين جميع الفاعلين بالدولة لضمان التحسين المستمر. Abstract: The following study highlights the need to integrate sustainability into the development of public policies that are evident in the quarterly and annual plans for all sectors within the Algerian Biodiversity Strategy (2016-2030). To achieve Aichi's objectives in the strategy project ,the study emphasizes the need for governance of implementation based on coordination and integration among all actors in the country to ensure continuous improvement

2021
الفرص الاستثمارية في مجال أنظمة تسيير النفايات في الجزائر . التحليل الاستراتيجيswot لفرص التعاون الهولندي– الجزائري. Investment Opportunities In Waste Management Systems In Algeria. Strategic Analysis Of Swot Opportunities For Dutch - Algerian Cooperation.
La revue : مجلة معهد العلوم الإقتصادية
Domaine : Développement durable
Mots Clés : إدارة النفايات؛شراكة هولندية- جزائرية؛تحليل إستراتيجي؛SWOT؛الجزائر. Key Word: Waste management, Dutch-Algerian partnership, Strategic analysis SWOT, Algeria
Auteur : Hebri Assia
Issn : Eissn : 2600-6731 vol : Volume 24, N, Num : Numéro 1,, pp : Pages 589-608
Résume :

تهدف الدراسة التالية إلى التحليل الإستراتيجي للفرص الاستثمارية للشركات الهولندية والشركات الأخرى فيما يتعلق بأنظمة تسيير النفايات في الجزائر على أساس وجود فرص كثيرة و متعددة التخصصات.أثبتت الدراسة بواسطة التحليل الإستراتيجي الرباعيSWOT للدراسة الإستراتيجية المعدة من طرف الوكالة الهولندية للأعمال2018،وجود إمكانيات عديدة للشريك الهولندي في مجال التجميع،التسليم،البناء والتطوير التكنولوجي ،زيادة معدلات التدوير الإستغلال الإقتصادي للنفايات،الخدمات الإستشارية و خلق القيمة،بإستخدام الشراكات المحلية ودراسات السوق المتخصصة في مجال تسيير النفايات. Abstract: The following study aims at strategic analysis of investment opportunities for Dutch companies and other companies with regard to waste management systems in Algeria, on the basis of the presence of many opportunities and multidisciplinary, by partnership with Algerian companies working in the field studied. The study was proven by the strategic SWOT contained in the strategic study prepared by Dutch Business Agency 2018, many possibilities exist for the Dutch partner in the field of assembly delivery, construction, technology development, increased recycling rates, economic exploitation of waste and value creation, using partnerships For local market studies specialized in the field of waste management

2021
المناخ التنظيمي وضغوط العمل علاقة مركبة بين الحتمية و ضرورة العلاج. Organizational Climate And Pressures Of Work ,a Complex Relationship Between Inevitability And Necessity Of Treatment
La revue : المجلة الجزائرية للعلوم الإجتماعية والإنسانية
Domaine : إدارة الموارد البشرية
Mots Clés : المناخ التنظيمي , ضغوط العمل ، الاتصال الفعال ، إدارة الضغوط الوظيفية ، الموارد البشرية .
Auteur : H.Assia,D.khaoula- Z.Hayet
Issn : Eissn : 2602-6058 vol : Volume 9, , Num : Numéro 1, pp : , Pages 74-101
Résume :

يشير المناخ التنظيمي إلى التفاعل بين خصائص الفرد المرتبطة إلى حد كبير بالنظام المعرفي والخبرات والتجارب والتعليم والثقافة و بيئة العمل التي تميز المنظمة عن غيرها من المنظمات وتختلف من منظمة إلى أخرى باختلاف الأبعاد التي تحدد المناخ التنظيمي من هيكل تنظيمي ، مركزية القرار،اتصالات،أنظمة أجورو حوافز،نمط القيادة،التكنولوجيا. أكدت الدراسة التالية وجود ارتباطات ذات دلالة إحصائية إيجابية مهمة ومتفاوتة التأثير بين ضغوط العمل والعوامل السابقة ، في إطار مناخ تنظيمي ملائم يعمل كوسيط ناجع بين متطلبات الوظيفة والحاجات المهنية للأفراد.

2021
ENGINEERING MATHEMATICAL MODELLING OF CORONA VIRUS (COVID-19) TRANSMISSION IN IRAQ
La revue : International Journal of Students Research in Technology & Management
Domaine :
Mots Clés :
Auteur : Emad Kamil.Hussein, Tayser Sumer. Gaaz, Kussay Ahmed. Subhi, Samir. Ghouali, Mohammed Seghir. Guellil
Issn : Eissn : 2321-2543 vol : 9, Num : 3, pp : 01-14
Résume :

Purpose: As a result of a sudden spreading of an epidemic novel virus, scientifically named COVID-19, this paper has been done to present a contribution towards fighting this virus in Iraq. Methodology: This investigation is focusing on constructing an engineering mathematical model based on the Suspected, Infected, and Recovered model (SIR), given by Kermack and McKendrick. Main Findings: Iraqi people are facing and suffering from this COVID-19. Three governorates occupying the locally highest infection levels, plus the world's highest deaths to infected cases ratio of about 11%, are Baghdad, Sulaimani, and Karbala. Implications: It is showed that the Reproduction ratio R0)K is positive (greater than 1) in the three nominated zones, which means that the epidemic disease will keep spreading in a broad manner and depending on many specific factors. Many effective recommendations are presented to avoid spreading this novel virus via many techniques. Novelty: SIR model is used to assess epidemic levels in 3 zones.

2021
COVIDz: Deep Learning for Coronavirus Disease Detection
La revue : Computational Intelligence Techniques for Combating COVID-19
Domaine :
Mots Clés :
Auteur : Mohammed Anis. Oukebdane, Samir. Ghouali, Emad Kamil. Hussein, Mohammed Seghir. Guellil, Amina Elbatoul. Dinar, Walid. Cherifi, Abd EllahYoucef. Taib, Boualem. Merabet
Issn : Eissn : vol : , Num : , pp :
Résume :

The severe damage caused by COVID-19 has become a reality, and there is no longer a way to save humanity from this epidemic except diagnose and prevention, especially with emergence delay and lack of vaccine recognized by the World Health Organization. Without therapeutic treatment or explicit restorative immunizations for COVID-19, it is fundamental to diagnose the disease at an early stage and quickly seclude patients contaminated with the virus. This study aims at estimating the damage via consistency of chest imaging, which is not always feasible or possible. Here, an application is proposed to solve the problem via a WEB Predictor ‘COVIDz” and a program exploiting deep learning, so as emergency care will be able to systematically bring chest X-ray images and predict the percentage of the absence or presence of COVID-19. The proposed approach (custom VGG model) and our WEB site “COVIDz” objective validation of the suggested solution obtained the best classification efficiency of 99.64%, F-score of 99.2%, precision of 99.28%, MCC of 99.28%, recall of 99.28%, and a specificity value of 100%.

2021
PV Energy Generation and IoT Power Consumption for Telecom Networks in Remote Areas
La revue : Technology and Economics of Smart Grids and Sustainable Energy
Domaine :
Mots Clés :
Auteur : Mohammed Anis. Oukebdane, Samir. Ghouali, Emad Kamil. Hussein, Mohammed Seghir. Guellil, Amina Elbatoul. Dinar, Walid. Cherifi, Abd EllahYoucef. Taib, Boualem. Merabet
Issn : Eissn : vol : 6, Num : 5, pp :
Résume :

Nowadays, electrical grids are using information and communication technologies for providing intelligence in electrical grids, since alternative energy sources are increasing to meet the world’s energy consumption demand. Interest in Internet of Things (IoT) is lastingly growing and may involve more data-sensitive projects when applied in smart micro-grids (SMGs), and security is a priority to be ensured for power distribution and consumption. Moreover, standards for IoT platforms should be optimized for monitoring such consumption and controlling grid resources, which present more demanding challenges. In such context, this work aims to adopt an appropriate PV-based energy generation system feeding a remote telecom network (RTN), via evaluating its performance, and monitor a related smart micro-grid (SMG) to offer a secure and energy-efficient management for RTNs. Simulink simulations have proved DC/DC converters as the best choice for future telecoms applications by using PV systems. Boost converters reveal to be suitable for PV systems while optimizing a fewer transformers electric energy conversion. A focus is also on how to detect and counteract attacks to prevent power theft/loss while feeding RTNs, showing that the best security choice is the use of Snort to prevent from inside net LAN, and ASA firewall to obstruct attacks from outside.

2021
NTP Security by Delay-based Detection in Intelligent Defense Systems
La revue : Journal of Telecommunication, Electronic and Computer Engineering
Domaine :
Mots Clés :
Auteur :
Issn : 2180-1843 Eissn : 2289-8131 vol : 13, Num : 1, pp :
Résume :

Nowadays, computer equipment has hardware or software clocks to which they refer to time stamp files, transactions and emails. The design of a quartz oscillator, such as clocks drift functions like ordinary watches that do not perfectly match. Therefore, it needs networked machines sharing common resources. For instance, UNIX makes command updates key files ensuring that files on which it depends exist and are up-to-date. Also, correlating log messages from several systems becomes very difficult if it does not occur at the same time. This paper focuses mainly on how to detect attacks, trying to predict attacks based on delays caused by this equipment. A server is configured using NTP protocol whose main target is to be implemented in UNIX system, to see how the NTP server is managed with the powerful package Chrony for Ubuntu. The examined results via Python reveal that clients neither will be nor able to make final decisions just after negotiating with servers in several attempts, before or after accepting their clock.

2016
Application du modèle de POLAK au cas de l’Algérie- période 2000-2013
La revue : Revue des Sciences Économiques – Sidi Bel Abbes
Domaine : Finance
Mots Clés : Prix du pétrole, réserves de change, offre de monnaie, PIB, crédit intérieur, emprunt extérieur net, balance commerciale, balance des paiements, ajustement, AMBP, modèle POLAK.
Auteur : Dr LEKKAM Abdelkrim Boudjelal
Issn : 1112-6191 Eissn : vol : 12, Num : 12, pp : 16-29
Résume :

L’économie algérienne est fortement caractérisée par une dépendance d’exportation des hydrocarbures, des emprunts extérieurs, d’un contrôle des changes rigoureux de la part des pouvoirs publics et d’un marché informel dominant. En Effet, le « contre chocs » pétrolier de 1986 avec le resserrement de la contrainte extérieure de biens de consommation, celle-ci revêtant à ce jour, une double forme, importante facture alimentaire engendrant une aggravation du déficit commercial et l’obligation d’importer davantage de denrées alimentaire. Elle a obligé le gouvernement algérien à accroitre ses exportations et son ouverture commerciale afin de pouvoir dégager un excédent dans la balance des paiements (BP). L’approche monétaire à la balance des paiements constitue un cadre théorique permettant d’identifier les éléments des déséquilibres de la balance des paiements et du budget gouvernemental. À l’aide du modèle de POLAK, l’évaluation de certains paramètres et la compréhension des interactions existantes entre les différentes variables de l’économie, nous aiderons à mieux percevoir la nature de ces déséquilibres. Le but principal du modèle a toujours été l'analyse et la compréhension des déficits de la balance des paiements et les actions politiques mises en œuvre pour les surmonter. Il importe de clarifier la manière dont l’approche monétaire de la balance des paiements (AMBP) pourrait contribuer à identifier les éléments des déséquilibres de la balance des paiements extérieurs. Ainsi que les actions politiques mises en œuvre pour les surmonter. Nous avons estimé les paramètres du modèle pour la période de 2000 à 2013. D’où, nous avons signalé que les entrées nettes de capitaux non

2021
Les régimes de changes adoptés par la banque d'Algérie: pour ou contre ?
La revue : Les Cahiers de CREAD
Domaine : Finance
Mots Clés : Taux de change, Monnaie, Régime de change, Marché des changes, Politique de change
Auteur : Dr LEKKAM Abdelkrim Boudjelal
Issn : 1012-0009 Eissn : 2437-0568 vol : 37, Num : 01, pp : 41-71
Résume :

L'Algérie est face à un environnement économique envisageant des changements significatifs, à l’intérieur du pays comme à l’extérieur. Beaucoup de ces changements ont d’importantes implications pour le choix du régime de change et sont probablement en train de rendre la défense de tout type d’ancrage difficile. Un régime de change autour d’un panier et admettant un degré de flexibilité à la monnaie nationale, en accord avec Williamson (1998, 2000), Dornbush et Park (1999) et Goldstein (2000), nous semble convenir le mieux. Il a la possibilité de se décliner sous différentes formes selon la situation du pays et les objectifs à atteindre. Il ressort donc de ce papier est que la politique de change en Algérie reste toujours restrictive, même si on parle d’un marché des changes pseudo-libéral à travers les mécanismes du marché interbancaire de change.

2021
قياس الأداء البيئي في إطار إعداد الإستراتيجية البيئية المستدامة،الإستراتيجية البيئية الكندية للفترة (2016-2019) نموذجا. Measuring Environmental Performance For The Preparation Of A Sustainable Environmental Strategy Canadian Environmental Strategy For The Period (2016-2019)as A Model.
La revue : المجلة الجزائرية للعولمة و السياسات الاقتصادية
Domaine : Environnement
Mots Clés : الإستراتيجية البيئية،الأداء البيئي،التنمية المستدامة،المؤشرات ،كندا. ; Key words: environmental strategy, environmental performance, sustainable development, indicators, Canada
Auteur : Assia Hebri.
Issn : Eissn : EISSN: 2600-6693 vol : Volume 12, , Num : Numéro 1,, pp : Pages 29-48
Résume :

تهدف هذه الدراسة إلى إبراز الدور الإستراتيجي لعملية قياس الأداء البيئي للإستراتيجيات البيئية الوطنية وأثره المباشر على ميكانيزمات تطويرها محليا و دوليا. أثبتت الدراسة التالية،من خلال تحليل المؤشرات البيئية الكندية الواردة في مشروع الإستراتيجية المعلن عنه في 2016،وخطط العمل التي تبين أولويات الاستدامة في كندا في الفترة المدروسة ما بين(2016-2019)،الأهمية الإستراتيجية للارتباطات النظرية والتطبيقية القائمة بين التطوير الإستراتيجي للأداء البيئي و عملية القياس العلمية للتحقيقات المنجزة لحساب البيئة الكندية. Abstract: This study aims to highlight the strategic role of the process of measuring the environmental performance of national environmental strategies and its direct impact on the mechanisms of their development locally and internationally, The Canadian Environmental Strategy for the period (2016-2019), shows the importance of the theoretical and practical links that exist between the strategic development of environmental performance and the scientific measurement process of environmental indicators contained in the draft strategy announced in 2016.

-0001
دور العينة في عملية جمع بيانات البحث العلمي
La revue : الدليل المنهجي في إعداد المذكرات و الرسائل الجامعية في العلوم الإقتصادية ، العلوم التجارية و العلوم التسيير بين التأصيل العلمي و الممارسات التطبيقية
Domaine : البحث العلمي
Mots Clés :
Auteur : لقام عبد الكريم بوجلال و الهلة محمد
Issn : ?.?.?.? 978 ?9931 ? 9612 ? 5 ? 3 Eissn : vol : , Num : , pp :
Résume :

كتاب جماعي: نشر بحث المعنون بـ "دور العينة في عملية جمع بيانات البحث العلمي" في كتاب جماعي محكم، ذو ترقيم دولي الموسوم بـ "الدليل المنهجي في إعداد المذكرات و الرسائل الجامعية في العلوم الإقتصادية ، العلوم التجارية و العلوم التسيير بين التأصيل العلمي و الممارسات التطبيقية". كلية العلوم الإقتصادية والتجارية و العلوم التسيير بالتعاون مع مخبر الدراسات و البحوث في التنمية الريفية. جامعة "محمد البشير الإبراهيمي" ـ برج بوعريرج ـ ر.د.م.ك 978 ـ9931 ـ 9612 ـ 5 ـ 3 ISBN ـ الجزائر.

2022
الاقتصاد الوطني وضرورة التحول إلى الاقتصاد الأخضر– تهديدات الحاضر و تحديات المستقبل
La revue : دفاتر البحوث العلمية
Domaine : إقتصاد الأخضر
Mots Clés : الطاقة الأحفورية ; الاقتصاد الأخضر ; التهديدات والتحديات
Auteur : لقام عبد الكريم بوجلال و بوزنورة أسماء
Issn : Eissn : 2716-8379 vol : 10, Num : 01, pp : 59-78
Résume :

الإكراهات البيئية من تدهور التربة، تغير المناخ وتعدد أشكال التلوث، إضافة إلى التهديدات التي يعاني منها الاقتصاد من خطر النضوب والأزمات الاقتصادية لاعتماده على الطاقات الأحفورية، كلها رهانات رئيسية تواجهها الجزائر وتفرض إعادة توجيه النموذج الاقتصادي نحو اقتصاد أخضر. وهذا ما عمدت إليه الجزائر منذ اثنى عشر سنة خاصة في مجالي الطاقة الشمسية وطاقة الرياح، إلا أنها لاتزال في بدايتها مع مواجهتها لتحديات عدة. فاستغلال الطاقات المتجددة في الجزائر يظل ضعيف جدا لم يتعد 0.5℅ من الاستهلاك الكلي وإنتاج الوقود الحيوي يبقى منعدما أما إنتاج الكهرباء انطلاقا من الموارد الطبيعية المتجددة يظل هو الآخر محدودا، مع استمرار الاعتماد الكبير على موارد الطاقة الأحفورية. نظرا للتكلفة المرتفعة لبرنامج التوجه نحو الطاقات المتجددة.

2022
الأهمية الإستراتيجية لقياس أداء أنظمة النقل المستدام،قراءة في مؤشرات الاستدامة للخطة الكندية للنقل المستدام للفترة(2019-2020). The Strategic importance of measuring the performance of sustainable transport systems ,study of stainability indicators of Canadian plan for sustainable transport (2019-2020)
La revue : دراسات إقتصادية
Domaine : Transport
Mots Clés : ظام النقل المستدام قياس الآداء ; الخطة الكندية للنقل المستدام
Auteur : Assia Hebri.
Issn : Eissn : EISSN: 2716-8301 vol : 16, Num : 03, pp : 420-440
Résume :

Transportation system and services are central factors in achieving progress,development and change, as they are indicative of the level of economic, social and environmental development of countries, as these systems involve a wide range of problems that come directly related to current transportation systems, such as polluting emissions, noise, traffic accidents and exhaustion. Resources and difficulty in accessing the luxury causes. Transportation is essential for large-scale development and has a profound personal impact on the lives of individuals.The following study,which was conducted on the Canadian Ministerial Program of Action for the period (2019-2020),by analyzing the tables of measurement indicators used in the field of sustainable transport, emphasizes the strategic importance of measuring the performance of the transportation system and the importance of indicators in forecasting and estimating the future directions of sustainability in Canadian transport for the coming period.