JFAS_Vol 11 N 03

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    THE 10th ANNIVERSARY OF THE JOURNAL OF FUNDAMENTAL AND APPLIED SCIENCES
    (university of eloued جامعة الوادي, 2019-06-01) Professor, Touhami LANEZ
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    HYBRID FUZZY SECOND-ORDER SLIDING MODE CONTROL SPEED FOR DIRECT TORQUE CONTROL OF DUAL STAR INDUCTION MOTOR
    (university of eloued جامعة الوادي, 2019-06-01) B., Kiyyour*,; D., Naimi,; A., Salhi,; L, . Laggoune
    This paper presents a Speed Fuzzy Second-Order Sliding Mode Control (FSOSMC) for Direct Torque Controlled Dual Star Induction Motor (DTC-DSIM). A DTC uses the instantaneous values of voltage vector where each reference voltage vector is computed with a DTC algorithm. The sliding mode control is characterized by its robustness against modeling disturbances and uncertainties; however, this technique has a major disadvantage which is the phenomenon of chattering that produces torque fluctuations. In order to overcome this drawback, a new control scheme that uses the FSOSMC for speed control is proposed. . It is shown that the proposed control strategy conserves the main advantages of the DTC in addition to reducing considerably the chattering effect. It is also robust against modeling disturbances and uncertainties. Several simulation tests are performed illustrating the high accuracy of the proposed control scheme.
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    HYBRIDIZATION APPARATUS FOR A NEW CHEMICAL COMPOSITION OF THE DREDGING SLUDGE: CASE OF THE BOUHANIFIA DAM
    (university of eloued جامعة الوادي, 2019-06-01) H, Marouf1*; A., Semcha2,; N., Bouhamou3,; , Moudjari4,M.; N., Mahmoudi5
    To overcome the deficit in natural resources and meet the ever-increasing demand in the field of construction, waste recovery channels represent significant interests in a sustainable development perspective. The valorization of the dredged silt at the Bouhanifia dam, located in the north-west of Algeria, for its use in the brick-making technology is the way we have followed. In the context of decision support in order to have an adequate chemical analysis of a clay used in the manufacture of red brick, the use of the Electre III multi-criteria method, developed in hybridization with the Genetic Algorithm, is recommended, which makes it possible to establish a ranking of the different parameters, within a set of potential actions constituting a range of possible solutions for the choice of the best chemical composition of the mud from the dredging of the Bouhanifia dam.
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    IMPACT OF FACADE CONFIGURATION ON ENERGY CONSUMPTION OF SCHOOL BUILDINGS IN CONSTANTINE (ALGERIA)
    (university of eloued جامعة الوادي, 2019-06-01) S., Benharkat
    n Algerian school buildings, heating and artificial lighting energy consumption counts for the important proportion of spending. Façade configuration is one of the major reasons because it affects the heating, cooling and lighting energy consumption of building. So, it is necessary to study the energy saving optimal design of transparent envelope for classrooms. In this paper, the impact of some parameters of transparent envelope on overall energy consumption (heating, cooling and lighting) are investigated using the two computer simulation softwares Ecotect analysis 2011 and Daysim 3.0. These parameters are: the orientation, the window to floor ratio, the heat transfer coefficient U and luminous transmittance LT of glazing materials. The results show a complex interdependence among these design variables.
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    INFLUENCE OF COEFFICIENT OF FRICTION ON THE PERFORMANCE OF PARALLEL GEARS
    (university of eloued جامعة الوادي, 2019-06-01) M., Aroudj1,; F., Inel2
    Gears performance is a very essential value that concluded the success of our system so researchers have worked hard to find mathematical relationships to calculate performance. Between these relationships we have the J.F. Debongnie method and the f.VILLE and VELEX method. In this work the yield of the parallel gears was calculated with the change of the modulus and the number of teeth using the J.F. Debongnie method and comparing them with the f.VILLE and VELEX method and associating them with the experimental results to be studied which is more close to the experimental results and the effect of the parameters selected in each method. After the comparison we found that the coefficient of friction the greatest impact on the performance whenever the lack of friction coefficient the greater the performance and the values of the J.F. Debongnie method higher than the values of the f.VILLE and VELEX method of the effect of the loss factor because it also affects the performance the greater the coefficient of loss whenever the performance.
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    MESO-TETRA-p-TOLYLPORPHYRIN: SYNTHESIS, CHARACTERISATION, ANTIOXIDANT ACTIVITY AND DETERMINATION OF BINDING PARAMETERS OF WITH SUPEROXIDE ANION RADICAL
    (university of eloued جامعة الوادي, 2019-06-01) A., Boutarfaia*1,; L., Bechki2; M., Kadri
    In this paper we present the synthesis and the evaluation of the antioxidant activity of meso-tetra-p-tolylporphyrin (TPPH2(p-methyl)) using superoxide anion radical . 2 (O )  in DMF as a solvant. The binding parameters of the interaction between the synthesised compound and the radical . 2 O were also measured using cyclic voltammetry techniques. TPPH2(p-methyl) shows lower antioxidant activity (30.7 ± 0.08 mg/mL) than that of α-tocopherol standard (3.04 ± 0.03 mg/mL). The value of the binding Gibbs energy of -8.15 KJ.mol-1 calculated for TPPH2(p-methyl) suggests an electrostatic interaction of . 2 O with TPPH2(p-methyl) which has been found to be the dominant interaction mode. The kinetics of the interaction reaction was also mesured having second-order rate constant values equal to 0.2 M-1 s-1.
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    NUMERICAL STUDY ON THE IMPORTANCE OF THE MIXED CONVECTION AND THE IMPACT OF THE COOLING RATE ON THE SOLIDIFICATION OF A PURE MATERIAL
    (university of eloued جامعة الوادي, 2019-06-01) T., Bouzennada*; F., Mechighel
    The present paper investigates numerically the solidification process of a pure metal, injected inside a channel, aiming to overview theoretically this complex phase change process, using COMSOL Multiphysics. The study is based on the Voller and Prakash model with fixed grid technique [1]. Results interpretation have been steered toward guessing the effect on the whole process of a varying entrance melt velocity; having proven that melt flow has a negative effect on the solidification rate. Also, the decreasing mid values of temperature transition (MVTT) would give fine numerical solution because it offers less thick mushy zone; this allows a good understanding to the solidification rate, mushy zone spreading and flow structure nearby solid region. Then, two different variable cooling rates functions were suggested comparing them to constant heat flux case. Results indicate that linear function
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    QUANTIFICATION OF PHENOLIC, FLAVONIODS COMPOUNDS, IN VITRO ANTIOXIDANT AND ANTIBACTERIAL ACTIVITY OF FLOWERS EXTRACTS FROM PUNICA GRANATUM L
    (university of eloued جامعة الوادي, 2019-06-01) M., Zidane1,; S.E., Laouini2,*; , . Ouahrani2 M. R.; A., Khelef1
    This study was aimed at examining total phenolic content, flavonoids, antioxidant and antibacterial analysis of flowers sweet and sour of tow system extracts of Punica Granatum L. Antioxidant efficacies of extracts were evaluated by phosphomolybdenum method. The antimicrobial activity of extracts of was determined against three. The phenolic contents of ethanolic 80% sour extract (EASE) was founded to have the highest value 480 ± 0.02 mg AGE.g-1 DW and the lowest value in ethanoic sweet extract (ES) 118 ± 0.02 mg AGE.g-1 DW. The total antioxidant activity was also found to be highest with EASE extracts. For the antibacterial activity the extracts showed moderate activity. The most sensitive microorganism was Staphylococcus aureus (diameter of inhibition is 23 mm) showed in ethanolic 80% sweet extract at 20 mg/ml.
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    TOXICITY AND SPR /SAR PROPERTIES OF ORGANOPHOSPHORUS INSECTICIDES USED IN AGRICULTURE
    (university of eloued جامعة الوادي, 2019-06-01) K., Guimeur1,; Z., . Almi2,; , Belaidi2* S.
    The application of computational methods on the organophosphorus derivatives shows that, these toxic compounds will not have problems with oral bioavailability. The toxicity of Organophosphorus insecticide depends upon the nature and the environment of the bonds with different receptors. The P-O bond plays a very important role in the process of the poisoning action inside the body. Calculated values of bond lengths, charges, dipole moments, heats of formation, drug-likeness and SPR/SAR properties, are reported in terms of the biological property/toxicity of organophosphorus insecticides, using the following quantum methods, ab initio/HF, and DFT/ B3LYP and PM3 method.