JFAS_Vol 09 N 01

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Analysis Of A Fully Developed Laminar Flow B/w Two Parallel Plates Separated By A Distance By Using Comsol Multiphysics
(University of Eloued جامعة الوادي, 2017-01-01) Raza, S. S.
This is a short analysis of flowing water in an infinite channel separated by a distance by using a Simulation Software Comsol Multiphysics. The flow behavior and the interaction with the boundary has been analysed. Wall no slip conditions were set for evaluation purpose. The analysis is a steady state analysis by using Incompressible Navier Stokes Model.
Analysis Of Metallurgical Aspects And Their Role In Processing And Performance Of Superalloys: A Review
(University of Eloued جامعة الوادي, 2017-01-01) Raza, S. S.; Ahmad, T.; Manzoor, M. U.; Kamran, M.; Ahmad, R.
Metallurgical processing factors like kinetic and thermodynamic parameters which are essential for modeling of γ′ phase precipitation have been studied. These parameters include γ′ solvus temperature, Gibbs free energy of dissociation of the γ matrix to form γ′, nucleation rate, effective diffusivity and interfacial energy. Nucleation methods and effect of cooling rate on the final phase structure have been analyzed. Co based superalloys have been studied as a potential and promising material for aerospace applications. Effect of microporosity on the mechanical properties of Superalloys has also been analyzed.
Analysis Of The Phenotypic Variability Of Twenty F3 Biparental Populations Of Bread Wheat (triticum Aestivum L.) Evaluated Under Semi-arid Environment
(University of Eloued جامعة الوادي, 2017-01-01) Fellahi Z. . . . . . .; Hannachi A.; Ferras K.; Oulmi A.; Boutalbi W.; Bouzerzour H.; Benmahammed A.
This research was conducted to screen and analyse the variability within twenty F3 populations of bread wheat (Triticum aestivum L.) generated by Line x Tester mating design. The results indicated the presence of sufficient variability within and between F3 populations for the eight measured variables, which represent plant phenology, physiology, yield and yield components. Different populations have been identified to improve the measured variables separately. The number of spikes appeared to be the most important determinant of grain yield. PCA and cluster analyses indicated that the Acsad1069/El Wifak and Acsad1135/Hidhab, with a relatively high grain yield, aboveground biomass and 1000 grains weight, are the best F3 populations to improve the productivity. However, Acsad899/Rmada and Acsad1135/Rmada populations were earlier and had a low number of spikes. These populations had also favorable genes for heat tolerance.
Antioxidant, Antibacterial And Cell Toxicity Effects Of Polyphenols From Ahmeur Bouamer Grape Seed Extracts
(University of Eloued جامعة الوادي, 2017-01-01) Ghouila, Z.; Laurent, S.; Boutry, S.; Vander Elst, L.; Nateche, F.; Muller, R. N.; Baaliouamer, A.
In this work and for the first time, significant concentrations of total polyphenols and flavonoids from Vitis vinifera L. grape seed extracts were obtained (256.15 ± 17.40 mg GAE/gdm and 14.08 ± 0.64 mg CE/gdm, respectively).The LC/MS analysis revealed richness in procyanidins. For antioxidant, antimicrobial and antifungal effects, the grape seed extract (GSE) responded positively. At 100 μg/mL, GSE induced a moderate toxicity of the order of 3.88% on 3T6 cells at the first 24 hours of treatment, whereas, its prolonged effect to 48 hours reduced this toxicity to less than 0.5%. As for the anti-proliferative effect on tumoral cell lines, a cell death of 18.39% to 23.79% and 10.30% to 20.37% was registered respectively for HeLa and BCPAP cells during 24 and 48 hours of treatment. Consequently, it is possible to consider using GSE at lower concentrations as an anti-proliferative agent without losing sight of its benefic effect on healthy cells.
Artificial Intelligence To Predict Inhibition Performance Of Pitting Corrosion
(University of Eloued جامعة الوادي, 2017-01-01) Boukhari, Y.; Boucherit, M. N.; Zaabat, M.; Amzert, S.; Brahimi, K.
This work aims to compare several algorithms for predicting the inhibition performance of localized corrosion. For this more than 400 electrochemical experiments were carried out in a corrosive solution containing an inorganic inhibitor. Pitting potential is used to indicate the performance of the inhibitor/oxidant mixture to prevent pitting corrosion. At the end of the electrochemical program a file containing all the experimental results has been prepared and submitted to several algorithms. Through a training phase each algorithm uses a set of experimental results to adjust its parameters and another set to predict the pitting potential starting from the properties and the chemical composition of the solution. The prediction performance of an algorithm is estimated by the difference between experimental pitting potential and the calculated one. The order of performance of the algorithms is: GA-ANN > LS-SVM > PSO-ANN > ANN >ANFIS > KNN > RT > KBP > LDA.
Backstepping Control Of Three-phase Three-level Four-leg Shunt Active Power Filter
(University of Eloued جامعة الوادي, 2017-01-01) Badra, M. S.; Barkat, S.; Bouzidi, M.
In this paper, backstepping control for three-level four-leg shunt active power filter (SAPF) system is proposed. The adopted filtering topology requires both a three-dimensional space vector modulation (3DSVM) for controlling the three-level four-leg inverter as well as DC voltage and filter currents control. The regulation of the DC voltage and filter currents is accomplished by backstepping controllers. The voltage-balancing control of two split DC capacitors of the three-level four-leg SAPF is achieved using three-level three-dimensional space vector modulation equipped by a balancing strategy based on the effective use of the redundant switching states of the inverter voltage vectors. The simulation results show the effectiveness of the proposed filtering system in terms of the compensation of the harmonics and the zero sequence current and the operation at unity power factor.
Contribution Of Gravimetry To The Hydrogeological Recognition Of The Area Of Wadi Righ –ouargla
(University of Eloued جامعة الوادي, 2017-01-01) Melouah, O.; Zeddouri, A.
Gravimetry is a geophysical methods often used in oil exploration and mining research but rarely in the hydrogeological field, the aim of this work is to exploit the gravimetric data to develop a structural model of the region of Oued Righ - Ouargla has less than 1,000 m depth and perform a litho-stratigraphic modeling of subsurface formations to assess the ability of a karst formation of the terminal complex water table (Eocene Senonian). Multiple filtrations and signal processing techniques for gravimetric datas were operated such as the Euler Déconvolution, the analytical signal and the horizontal gradient. The results were used to evaluate the potential of karstification in the area and to model the phenomenon; the subsurface structural mapping has also led to the relationship between the well productivity and network of faults and fractures.
Contribution To The Study Of The Biodiversity Of Benthic Invertebrates And The Biological Quality Of Some Rivers In The Watershed Boumerzoug (east Of Algeria)
(University of Eloued جامعة الوادي, 2017-01-01) Bekhouche, N.; Marniche, F.; Ouldjaoui, A.
The composition of invertebrate communities colonizing the bottom of rivers, called for this reason benthic macro invertebrates, allows characterizing the biological quality of river water.This study focuses on benthic macrofauna of oued Boumerzoug and its two tributaries: Oued El Guareh and Oued Segus. Eleven (11) stations were prospecting object, between December 2014 and April 2015.The six sampling campaigns have identified a faunal population consisted of 7364 individuals, distributed in 106 taxa, with predominance of Diptera and the lack of sensitive polluo- elements (plécoptères). The results of analysis by method " IBGN " reveal poor hydro biological quality in the stations (G1, G2, G3, S1, S2, S3, S4, B1) and bad qualities for stations (B2, B3, B4).
Desert Truffles From Northeastern Algerian Coastal Dunes: Ecology, Identification And Symbiosis
(University of Eloued جامعة الوادي, 2017-01-01) Dafri, A.; Beddiar, A.
For several years, greater attention has been focused on desert truffles of Southern and Western Algeria. The present work is the first to be concerned on desert truffles from northeastern Algerian littoral dunes. The aim of this work is to describe northeastern Algerian truffle fields, identify collected truffle species and their symbiotic plant partner. We required two years field prospections, soil analysis, ascocarps morpho-anatomical and molecular analysis. We concluded that truffle fields share an acid sandy-loam soil and a notable abundance of many subspecies of Tuberaria gutatta (L.) Fourr. 1868, proved as desert truffles symbiotic partner. Two sandy truffle species are recorded: Terfezia arenaria (Moris) Trappe (1971) and Tuber gennadii (Chatin) Patouillard 1903. This data is the first to review knowledge on northeastern desert truffles and to report Tuber gennadii in Algeria.
Diagnosis Of Rotor Fault Using Neuro-fuzzy Inference System
(University of Eloued جامعة الوادي, 2017-01-01) Merabet, H.; Bahi, T.; Drici, D.; Halem, N.; Bedoud, K.
The three-phase induction machine (IM) has a large importance and it is widely used as electromechanical system device, and because of their; robustness, reliability, and simple design with the well developed technologies. In spite of all cited advantages, the induction machines are suscptible to various types of electrical and mechanical faults that can lead easly to excessive downtimes, which can lead to tuge losses in terms of maintenance and production. This work presents a reliable approach for diagnosis and detection of broken bar faults in induction machine. The detection of faults is based on monitoring of the stator current signal. Also the calculation of relative energy value for each level of signal decomposition is determinated by using package wavelet, and this method will be useful as data input of Adaptive Neuro-Fuzzy Inference System (ANFIS). In the ANFIS approach the adaptive Neuro-Fuzzy inference system is able to identify the rotor of induction machine state with high precision.This method is applied by using the MATLAB®/Simulink software.
Effect Of Aggregate Grain Size Distribution On Properties Of Permeable Concrete
(University of Eloued جامعة الوادي, 2017-01-01) Yazici, ş.; Mardani-aghabaglou, A.
In this study, the effect of aggregate grain size distribution and water/cement (W/C) ratio on the mechanical properties of permeable concrete is investigated. The aim of this study is to prepare permeable concrete mixture with optimum properties in terms of strength and permeability. For this purpose, five different permeable concrete mixtures with 0.3 constant W/C ratio and containing different proportions of coarse aggregate which are 5-15 and 15-25 mm, but containing no fine aggregate are prepared. In addition, three different concrete mixtures with 0.35 W/C ratio and containing 20% (by weight) fine aggregate and different proportions of coarse aggregate which are 5-15 mm and 15-25 mm are prepared. Afterwards, some tests related to the compressive strength, splitting tensile strength, flexural strength, ultrasonic pulse velocity (UPV) and permeability of concrete mixtures are conducted. Test results demonstrate that permeability, strength and UPV of the mixtures increased upon using 20 wt% of fine aggregate instead of coarse aggregate and upon reducing coarse aggregate grain diameter though W/C ratio of mixtures increases from 0.3 to 0.35.
Effect Of Salt Stress On Some Physiological Parameters In Atriplex Halimus L.
(University of Eloued جامعة الوادي, 2017-01-01) Soualmi, N.; Belkhodja, M.; Adda, A.
The impact of salinity applied for five weeks followed two provenances of Atriplex halimus L. harvested from Oran (Algeria coast) and Ain Dheb (high plateaus west of Algeria). The analyzed parameters are physiological from the leaves of young plants grown in a greenhouse stored in air-conditioned glass. Two types of salt stress are imposed on plants from the 165th day after sowing for a batch CaCl2 + NaCl to 300 meq and 600 meq.l-1and for the other batch to undiluted water sea with a frequency of watering every other two days. The results of water indicators such as the relative water content (RWC or TRE) showed some fluctuation during the five weeks under the two types of stress. Transpiration (water loss from the excised leaf or RWL) measured after 30, 60 and 120 min at the end of the period of application of stress presents a decline in both sources and types of stress. In addition, the stomatal resistance showed considerable variability for both sources and the type of stress.
Effect Of Soil Moisture On Trace Elements Concentrations Using Portable X-ray Fluorescence Spectrometer
(University of Eloued جامعة الوادي, 2017-01-01) Sahraoui, H.; Hachicha, M.
Portable X-ray fluorescence (PXRF) technology can offer rapid and cost-effective determination of the trace elements concentrations in soils. The aim of this study was to assess the influence of soil moisture content under different condition on PXRF measurement quality. For this purpose, PXRF was used to evaluate the soil elemental concentrations for Ca, Mg, Cd, Cr, Cu, Ni, Zn, P, Fe, Mn and Pb in 60 samples in a perimeter irrigated with treated wastewater (Cebala Borj Touil, North-east Tunisia). Scanning was conducted under four moisture conditions: in-situ, dried soil at 105°C, 40% moisture content soil and saturated soil. All were then compared relatively to dried sample scans. As expected, the relationship between dried vs both in-situ and 40% moisture content elements concentrations were linear. However, PXRF readings from saturated samples were significantly underestimated compared to the measurements on dry samples. Furthermore, soil moisture content caused a significant under-reporting of elemental concentrations compared to the scanning on dry samples. PXRF acted differently for each element following the moisture content of soil. In fact, attenuation coefficient σ of Cr, Fe and Mn were the most affected by saturation of soil samples, whilst Ca, Mg and Ni were more affected for 40% moisture content while Cd, Pb, Zn, Cu and P were affected for in-situ measurements. Correction equations enhanced the error produced by the water influence moisture content and corrected PXRF measurements.
Evaluating Morphological Variability Of Artemisia Herba-alba Asso From Western Algeria
(University of Eloued جامعة الوادي, 2017-01-01) Maghni, B.; Adda, A.; Merah, O.
This work was interested on the study of the morphological variability of 120 individuals of Artemisia herba-alba Asso coming from three stations in western Algeria , which was assessed through 15 quantitative and qualitative characters. Analysis of variance (ANOVA) and hierarchical cluster analysis (HCA) results showed significant morphological variability inter and intra-population. This phenotypic variability is explained by a high genetic polymorphism determined at another genetic study that we conducted in parallel on individuals of the same site using molecular markers types ISSR.This study also revealed a large variability within A. herba alba which could help investigation on a large collection of individuals and therefore select the most efficient ecotypes for re-introduction this species in steppes and highlands of Algeria.
Evaluation Of Frasnian Shale Reservoir, Case Study Well Dak-1, Ahnet Basin, Southern Algeria
(University of Eloued جامعة الوادي, 2017-01-01) Kadri, M. M.; Hacini, M.
The evaluation of unconventional reservoir in term of future exploration plan where the geochemical data are not unavailable making us different results from logging and Gas Data However this paper aim to define Potential zone throught the estimation of total organic carbon(TOC) using ∆ log R Method and thermal maturity by mean of gas ration technique combined with gamma-ray data of Frasnian shale formation encountered in DAK-1 well drilled in Ahnet Basin from 1552m to 1728m. The results suggest that the frasnian shale have fair to good potential genration with TOC ranging from 2% to 4%, with mature organic matter who producing wet gas,The potential zone positioned in the lower frasnian over a thikness of 10m.
The Evolution Of Shrinkage Strain Of Pet-mortar Composite Eco-materials
(University of Eloued جامعة الوادي, 2017-01-01) Chaib, O.; Benosman, A. S.; Kazi Tani, N.; Senhadji, Y.; Mouli, M.; Taïbi, H.; Hamadache, M.
Concretes and mortars are subjected to several kinds of shrinkage strains which represent the volumic variations resulting from the cement hydration and are governed by various physical and chemical aspects. The use of polyethylene terephthalate PET plastic wastes which are available in quantity and within low cost in our country yields a very important economic and environmental impact in the construction industry. Thus, we are interested to investigate the effect of PET volumetric additive amounts for cement substituting and for the behavior of the total, drying and autogenous shrinkage. Comparison study of obtained experimental results with codale prediction models were performed according to Eurocode 2 (EC2) in order to analyze the evolution of shrinkage strain with PET-mortar composite ages and for several rates of PET waste additions. According to obtained results, PET additions acts to reduce shrinkage strains of PET-mortar composites which promote the use of these modified mortar Eco-materials in the field of construction industry.
The Fate Of Water In The Oasis Of Ouakda Between Traditional Systems And Modern (region Of Béchar, Southwest, Algeria)
(University of Eloued جامعة الوادي, 2017-01-01) Rezzoug, C.; Remini, B.; Hamoudi, S.
One of the subjects that touch the field of environment is undoubtedly the traditional catchment systems and drainage divide in the oasis. The ancestral techniques such as wells chadouf, quanat, Khettara and foggaras have protected the oasis and the man in the past. These techniques were used in an arid middle by the oasis dwellers and resisted to a hostile climate for centuries. In spite of the low rainfall in the region of our oasis, the oasis dwellers of Ouakda through their intelligence, they were able to cultivate their land without disturbing a fragile ecosystem through exploitation of groundwater table thanks to the use of foggaras with the small distance which does not exceed 100 m. But the intervention of modern systems of water catchment like deep boreholes which overexploiting nonrenewable tablecloths and the pumps large capacity, the man has completely destroyed a clean environment. Today, thanks to these pumping, the groundwater level has dropped considerably; soil salinity is remarkable on all the parcels of the old palm grove and the Oued. We try in this Article to study the history of traditional techniques of water catchments in the oasis of Ouakda, to do a comparison between the ancestral systems used in the another oasis in this oasis, to study the impact of the motor pumps on the degradation of traditional systems and detrimental effects (Soil salinity and the phenomenon of lowering of the groundwater) after the use of modern techniques of water catchment.
Geochemical Characterization The Waters Of Foggaras The Continental Intercalary Aquifer Of Timinoune Region (south West Algeria)
(University of Eloued جامعة الوادي, 2017-01-01) Benaricha, B.; Khaldi, A.; Elouissi, A.; Mouassa, S.; Zaagane, M.
The study of the Continental Intercalary (C.I) groundwater of the region of Timimoune (southwestern Algeria), based on physico-chemical data (major elements), allowed to understand the geochemistry of foggaras water. The aquifer is contained in the formations of the Lower Cretaceous (Albian and Barremian). The waters are strongly mineralized with an average value 2g / l.The waters have a clear predominance of facies chlorinated-sodium. The risk is high to excessive soil salinization, and the risk of medium alkalinity to very high. Statistical analysis led us to reach two conclusions, the first is that, variable electrical conductivity (EC), dry residue (RS), Na+, Ca2+, Cl-, SO4--, mineralization, are best correlated and responsible the signing of the mineral load of water, the second is that the nitrate ion (NO3-) opposite to the above-mentioned variables mark its anthropogenic origin.
Groundwater Quality In Arid Regions: The Case Of Hassi Messaoud Region (se Algeria)
(University of Eloued جامعة الوادي, 2017-01-01) Bouselsal, B.
After chemical quality study, it has been realized that the groundwater of Hassi Messaoud region isn’t drinking one according to WHO and Algerian standards for drinking water. This water is highly mineralized and very hard and its major concentrations are often higher than recommended standards, so it requires treatment before use. The time that irrigation water quality is based on riverside standards (1954), the waters of the terminal complex of aquifers have average SAR values high, these waters arrange themselves in the poor and bad classes. However Continental Intercalary waters arrange themselves in the poor classes for irrigation.
The Influence Of Co2+ Concentration On The Electrodeposition Of Znni Films To Obtain The Znni–co Composite Coatings
(University of Eloued جامعة الوادي, 2017-01-01) Diafi, M.; Degheche, K.; Ben Temam, H.
In this work we have done an experimental study of Zinc- Nickel composite coatings. For this, the influence of the cobalt concentration was the principal object in order to improve the resistance of the corrosion of the coatings, which has been made by electroplating on steel substrates previously treated, have been studied by several characterization methods, as the X-ray diffraction, micro-hardness measurement and scanning electron microscopy (SEM), protection against corrosion properties studied by potentiodynamic polarization measurements (Tafel) and electrochemical impedance spectroscopy (EIS) to the potential of corrosion free . The parameters wich characterize the corrosion behavior; can be determined from the Nyquist plots. It has been observed that the ternary Zn–Ni–Co alloy is characterized by enhanced the resistance of corrosion compared to the binary Zn–Ni alloys. and the addition of Co in the Zn-Ni increases the micro-hardness, XRD and SEM results and identify any coatings Zn-Ni-Co alloy composition reveals that γ-Ni5Zn21 phase, Co matrix phase and pure zinc phase.

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