https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7130 المقالات العلمية لاساتذة كلية العلوم والتكنولوجيا 2026-03-24T10:08:12Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7517 Title: Etude de la Minéralisation et de la Granulométrie des Sols de la Sebkha de Ouargla Authors: BOUTELLI, Med Hichem; Abdelkader, HADJ SEYD Abstract: The Sebkha of Ouargla is located north-west of the city of Ouargla in the lower Eastern Sahara. The climate of the region is known for its particularly marked by low and erratic rainfall aridity, in one hand, and the thermal amplitudes and temperatures too high on the other. This aridity is not observed only on the lack of rainfall, but also by high evaporation which is one of the current major climatic factors prevailing in the region. The latter exceeds 380 mm in July. To understand the evolution of salinity in this system, physico-chemical study of various constituent training is conducted along a north-south profile. Six piezometers were installed for sampling of surface water and groundwater monitoring groundwater level. Particle size analysis is used to determine the relative amount of different elements constituting the ground (gravels, sands, silts, clays). The size distribution curves showed that most of the samples belong to the class of arenites. This is mostly fine sand (84%) and medium sand (10%). The physico-chemical analysis of the soil 1/5 affirms the high salinity of samples. The values of electrical conductivity at 25 ° C are between 3.15 and 24.26 dS.m-1. The insoluble rate exceeds 80%, the gypsum is more than 12% while the limestone is negligible (<2%). Description: Journal of Advanced Research in Science and Technology ISSN: 2352-9989 78 © 2014 JARST. All rights reserved Etude de la Minéralisation et de la Granulométrie des Sols de la Sebkha de Ouargla 2014-01-01T00:00:00Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7515 Title: Le Prototypage Rapide des Méthodes de Fabrication Express et sur Mesure Authors: Bennouna, Mohammed Salah; Benaoumeur, Aour; Sadek, Kaddour Abstract: The product design is a complex task which is carried through several stages. It begins with the establishment of functional specifications book (cahier de charges fonctionnel) which details the product features and allows an adequate analysis. This task is entrusted to a multidisciplinary team that launches searches in all directions (market research, the study of similar products and identifying their shortcomings and disadvantages.). An essential step by which the product must successfully pass during its development, this step is the realization of a prototype which will be a test and assurance of the proper functioning of the finished product. The realization of a prototype is itself a complex phase that requires sophisticated equipment and should be realized in as short time as possible in order to bring the product to market in a timely manner. Rapid prototyping offers the possibility of producing the finished products in very short time with more complex shapes. Description: Journal of Advanced Research in Science and Technology ISSN: 2352-9989 398 © 201 7 JARST. All rights reserved Le Prototypage Rapide des Méthodes de Fabrication Express et sur Mesure 2014-01-01T00:00:00Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7514 Title: Compilation d’un nouveau logiciel pour l’identification des espèces d’insectes orthoptères Authors: Abdelkader Hadj, Seyd; Abdellahi, Kemass; Toufik, Ghrib Abstract: In this work consists in the development of a software allowing to identify some species of grasshoppers insects based on the identification key of L. CHOPARD. The software "ORTHOPTERISTE" accurately identifies a multitude of these insects (198 species spread over 19 families and 85 genders) belonging to two suborders ENSIFERA (49%) and CAELIFERA (51%). With its interactive graphical interface, guiding the user, step-by-step, the software starts by identifying the sub-order then the super-family then the family and gender, finally arriving to identify and precise the studied specie. Identification is based on etymological, morphological and physiological differences between the said insects. Description: Journal of Advanced Research in Science and Technology ISSN: 2352-9989 878 © 201 9 JARST. All rights reserved Compilation d’un nouveau logiciel pour l’identification des espèces d’insectes orthoptères 2014-01-01T00:00:00Z https://dspace.univ-ghardaia.edu.dz/xmlui/handle/123456789/7513 Title: Effet combiné de la température et de l'attaque au sulfate de magnésium sur la durabilité du mortier à base de ciment composé au laitier Authors: Mohammed Nadjib, AZIEZ; Achour, Abderraouf; Abdelillah, Bezzar Abstract: The aim of this work is to study the effect of temperature on the durability of mortars in a sulphate- magnesium-rich environment (5% MgSO4).The strength of mortars after 12 months of immersion in the sulphate solution is evaluated by visual observation, mass variation, compressive strength, and XRD analysis. No damage was observed on the samples exposed to the sulphate solution at 20, and 50 °C, except for mortars exposed to 5 °C which are very sensitive to the formation of thaumasite. Results show that high temperature improved the mechanical strength and do not necessarily accelerate the degradation due to magnesium sulphate. Description: Journal of Advanced Research in Science and Technology ISSN: 2352-9989 985 © 201 9 JARST. All rights reserved Effet combiné de la température et de l'attaque au sulfate de magnésium sur la durabilité du mortier à base de ciment composé au laitier 2014-01-01T00:00:00Z