Boudjema A.M.,University Of Guelma |
Samraoui F.,University Of Guelma |
Youcefi A.,University Of Guelma |
Djelailia A.,University Of Guelma |
And 6 more authors.
Alauda | Year: 2011
Safîoune is the second breeding site found in the Sahara and the third one of the Greater Flamingo Phoenicopterus roseus recorded in Algeria. An estimated 1500 breeding pairs bred successfully in winter and spring 2011. Despite the drying out of the saltpan attack of Golden Jackals Canis aureus, 600 chicks fledged. Nesting birds originatedfrom Algeria, France, Italy and Spain, thus confirming the connectivity of this Algerian breeding site with otlier sites within the Mediterranean area. A ringing operation was set up and 62 chicks were successfully ringed with Darvic plastic rings.
Kadri F.,University dOuargla |
Drid S.,University of Batna |
Djeffal F.,University of Batna |
Chrifi-Alaoui L.,CNRS Laboratory of Technology and Innovation
2013 8th International Conference and Exhibition on Ecological Vehicles and Renewable Energies, EVER 2013 | Year: 2013
These days, electrical drives generally associate inverter and induction machine. Thus, these two elements must be taken into account in order to provide a relevant diagnosis of these electrical systems. The aim of this paper is to study the feasibility of fault detection and diagnosis in a three-phase inverter feeding an induction motor. The proposed approach is a neural network classification applied to the fault diagnosis of a field oriented drive of induction motor. Multilayer perception (MLP) networks are used to identify the type and location of occurring fault using the stator Concordia mean current vector. In the case of a single fault occurrence, a localization domain made with seven patterns is built. With the possibility of occurrence of two faults simultaneously, there are twenty-two different patterns. Simulated experimental results on 1.5-kW induction motor drives show the effectiveness of the proposed approach with a classification performance over than 95%. © 2013 IEEE.
Nesting data of the Southern Gray Shrike Lanius meridionalis in two habitats of the northern Saharan Algeria [Nidification de la pie-grièche méridionale lanius meridionalis elegans dans deux types de biotopes du sahara septentrional algerien]
Ababsa L.,University dOuargla |
Sekour M.,University dOuargla |
Souttou K.,Ziane Achour University of Djelfa |
Guezoul O.,University dOuargla |
And 3 more authors.
Alauda | Year: 2016
Nesting data of this species were collected in 2009 and 2012 in two habitats (palm groves and daya). The density of breeding pairs varied between 4 pairs/167 ha and 6 pairs/10 ha in the palm groves and was of 4 pairs in daya (8ha). In palm groves, the nests are located in the canopy of young palms Phoenix dactylifera. The height of nests varied between 1.5m and 4.7m. In the daya habitat, the species nests in Zizyphus lotus bushes at 3m above ground. The nests have a conical shape on Phoenix dactylifera and a spherical shape in Zizyphus lotus. Three types of nest material were found (plant, animal and household waste). First egg were laid in February. Clutch size varied between 2 and 5 eggs. The breeding success varied from 45.5% to 48.5% in palm groves and was of 66.7% in one nest of the daya habitat.
Effect of seawater on two water parameters (turgescence and transpiration) of young plants of Atriplex canescens) [Effet deau de mer sur deux paramètres hydriques (turgescence et transpiration) de jeunes plants dAtriplex canescens]
Mehani M.,University dOuargla |
Bissati S.,University dOuargla |
Djeroudi O.,University dOuargla
Journal of Materials and Environmental Science | Year: 2012
Two hydric parameters were studied in this work, in relation with salt stress tolerance, i.e. turgescence and transpiration, in young plants of Atriplex canescens. We determined the relative water content (RWC or TRE) or turgescence and relative water loss by transpiration (RWL). For this, we tested the action of sea water at 50% and sea water at 100 %. The results after a week of stress show that: the salinity has a highly significant effect. Moreover, whatever the studied parameter (turgescence, transpiration), the values are increased in the presence of the nutritive solution only. If the salt concentration exceeds 50% sea water, these parameters decrease and the salt is harmful. Results also showed the existence of a close relationship between these parameters. Thus, when the relative water content (RWC) decreases, there is a gradual decrease in water loss (RWL) transpiration, characterized by stomatal closure.