Oum el Bouaghi, Algeria
Oum el Bouaghi, Algeria

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Missaoui B.E.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Kouadri Y.,University of Ouargla | Gherraf N.,University Larbi ben Mhidi
Asian Journal of Chemistry | Year: 2015

The purpose of this work is the development of a synthetic pathway that allows access to heterocyclic compounds containing the 1,5-benzodiazepines. The dehydroacetic acid has been widely studied as a starting material for the synthesis of natural products that exhibit interesting pharmacological properties. In the present work, we describe an easy and cost effective access way to new products 1,5-benzodiazepines involving a pyranic residue. All synthesized products were subjected to IR, 1H NMR and mass spectra studies.


Kouadri Y.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Missaoui B.E.,University of Ouargla | Gherraf N.,University Larbi ben Mhidi
Asian Journal of Chemistry | Year: 2015

The β-keto ester undergoes condensation reactions with aliphatic and aromatic amines in ethanol to give high-yielding β-enamino ester. The method is simple, cost-effective and environmentally benign. Structural characterization of the synthesized compounds was carried out by spectroscopic methods (1H NMR, 13C NMR and DEPT).


Kouadri Y.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Missaoui B.E.,University of Ouargla | Gherraf N.,University Larbi ben Mhidi
Asian Journal of Chemistry | Year: 2015

Ethyl 2-oxocyclohexanecarboxylate has undergone smooth condensation with arylamines under ethanol. The corresponding β-enaminoesters compounds were obtained in good yields. These compounds were then refluxed in biphenyl ether to attain the respective substituted tetrahydroacridin. The reaction of 2-amino-5,6-dimethylbenzimidazole with β-cetoesters gave access to an efficient synthesis of pyrimidinone derivatives in excellent yield. A series of novel heterocycles were prepared. Biological properties of compounds 11-14 have been distinctively evolved.


Missaoui B.E.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Kouadri Y.,University of Ouargla | Gherraf N.,University Larbi Ben mHidi
Asian Journal of Chemistry | Year: 2015

The purpose of this work is the development of a synthetic method that allows access to some heterocyclic compounds containing pyrimidine and pyrazole nuclei. The dehydroacetic acid has been extensively studied as a starting material for the synthesis of natural products that exhibit valuable pharmacological properties. In the first part, we have shown that the pyrimidines can be obtained by reacting dehydroacetic acid with nitrogen binucleophiles reagents. In the second part, we presented the reactivity of the previously synthesized derivatives towards hydrazine to yield derivatives involving pyrimidine and pyrazole motifs. All the synthesized products were subjected to IR, 1H NMR and mass spectra studies. © 2015, Chemical Publishing Co. All rights reserved.


Benchouia N.E.,Skikda University | Derghal A.,University Larbi Ben Mhidi | Mahmah B.,Renewable Energy Development Center Algeria | Madi B.,Skikda University | And 2 more authors.
International Journal of Hydrogen Energy | Year: 2015

Among the various fuel cell technologies available for use in vehicular systems, the Proton Exchange Membrane Fuel Cell (PEMFC) has drawn the most attention due to its simplicity, viability, higher power density and operation at lower temperatures. Due to this features, PEMFC is considered to be the most suitable technology for vehicular systems, industry and other applications.As fuel cells are likely to be used in many future applications, great efforts have recently been made for their comprehension and design. This paper focuses on a 1.2W PEM fuel cell unit and develops the models of stack voltage and stack power. While PEM fuel cell is a nonlinear process, it is very suitable to use fuzzy control to solve the control issue of the fuel cell. The stack output power can be controlled to a given value by using a variable universe fuzzy controller by controlling input gases flow rate.In this paper a FLC controller have been designed to control the voltage of at the presence of fluctuations. The results of implementation of this designed FLC controller on a dynamic electrochemical model of a small size 1.2W, PEM fuel cell have been simulated by MATLAB SIMUlINK and compared with a traditional PID controller. Simulation results show that good control effects can be achieved by using the adaptive fuzzy control system. © 2015 Hydrogen Energy Publications, LLC.


Kef M.,University Larbi Ben Mhidi | Chergui L.,University Larbi Ben Mhidi | Benmohammed M.,University of Mentouri Constantine
International Arab Journal of Information Technology | Year: 2011

The study and the implementation of routing algorithms to ensure the connexion of Ad-hoc networks as often defined (every summit may reach any other) is a hard task to achieve. The environment is dynamic and evolves through time; the topology of network may change frequently. Two distinct approaches tried to apprehend this problem. The first one is based on a flat vision of network, and the second one on an auto-organisation structure. This paper deals with the study of auto-organisation solution for Ad-hoc networks, and the benefit effects brought by this last to the routing-process.


Leila C.,University Larbi Ben Mhidi | Maamar K.,University of Batna | Salim C.,University of Mentouri Constantine
International Arab Journal of Information Technology | Year: 2012

Combining classifiers is an approach that has been shown to be useful on numerous occasions when striving for further improvement over the performance of individual classifiers. In this paper we present a Multiple Classifier System (MCS) for off-line Arabic handwriting recognition. The MCS combines three neuronal recognition systems based on Fuzzy ART network used for the first time in Arabic OCR, multi layer perceptron and radial basic functions. We use various feature sets based on Tchebichef, Hu and Zernike moments. For deriving the final decision, different combining schemes are applied. The best combination ensemble has a recognition rate of 90,10%, which is significantly higher than the 84,31% achieved by the best individual classifier. To demonstrate the high performance of the classification system, the results are compared with three research using IFN/ENIT database.


Labed B.,University of Ouargla | Bebba A.A.,University of Ouargla | Gherraf N.,University Larbi Ben Mhidi
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2014

The aim of this study is to highlight the ability of plants to purify wastewater with a horizontal flow system under a dry and hot climate. This study involves a comparison between a planted bed and an unplanted bed (used as witness) focusing on the plant's ability to filter wastewater. The study was carried out through an experimental pilot scale in the area of urban wastewater treatment (ONA Touggourt, Algeria). The process consists of circular beds with a capacity of 130 L filled with superimposed layers of gravel (25/15) mm and sand, 45cm and 10 cm deep respectively. The first bed was planted with freshly collected stems of the plant Juncus effusus (36 stems/m2) and an unplanted bed taken as a witness. The procedure consists of providing the bed with urban wastewater (feed) after primary treatment (physical treatment) with a flow rate of 30 L per day over regular intervals once every week. The water obtained after staying 5 days in the bed is collected in a vase. After analysis the results revealed important removal fractions of the main pollutants namely: chemical oxygen demand (COD) (82.21%), biochemical oxygen demand (BOD5) (85%), total suspended solids (TSS) (94.41%) nitrite NO2 - (82.32%), orthophosphate PO4 -3 (82.92%), E. coli (99.41%), total coliforms (99.97 %) and total streptococcus (99.90 %). The presence of the plant stems in the unplanted bed leads to the creation a crossing water channel so as to avoid plugging.The considerable decrease of pollutants content and harmful organisms enables the reuse of the treated water in agriculture and industry.


Chibani A.,Lille University of Science and Technology | Mahfoudi C.,University Larbi Ben mHidi | Chettibi T.,Beb Erdgas Und Erdöl Gmbh | Merzouki R.,Lille University of Science and Technology
2012 IEEE International Conference on Robotics and Biomimetics, ROBIO 2012 - Conference Digest | Year: 2012

This paper describes geometric and kinematic modelling steps of a class of an hybrid hyper-redundant robot (HHRR). The main problem of such complex manipulator robot structures is the synthesis of an appropriate control of n number of degrees of freedom (DOF). Thus, it is important at the design step, to develop geometric and kinematic models allowing to reconstruct the kinematical behavior of n concatenated modules. The studied structure is considered as modular with multiple DOF and is built by connecting in serial many parallel modules. The coordinate frame distribution is based on space curve differential geometry. The inverse Geometric and kinematic models are calculated analytically for a n-DOF of HHRR manipulator while the final application is applied to the case of a 3-modules robot (18-DOF). © 2012 IEEE.


Mellal N.,University Larbi Ben Mhidi
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

According to Brézillon, context is not directly involved in solving a problem, but forced his resolution. In educational community, knowledge is transmitted from tutor to learner(s). However, two main issues are occurred. On one hand, Learner is facing resource bank and s/he has to seek the appropriate information from the relevant resource. To solve this problem, it is required to help learner by providing the context of resources in a pertinent organization. Ontologies represent the essential technology for the organization of eLearning resources. On the other hand, a massive amount of ontologies have spread among eLearning Systems. Our objective is to coordinate these ontologies in order to expand the (re)use, the search, the share of learning resources. For that aim, we propose a method which defines laws to relate automatically relevant parts of different ontologies, based on a mathematical model "Information Flow". © 2013 Springer-Verlag.

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