احمد التجاني محمود ادم يحيى, عبد الرحيم.عاطي

كلية الدراسات العليا-جامعة النيلين · السودان

ABSTRACTThis research discusses problems of change measured values of frequency and voltage and deviate from nominal values of power system by application and function of automatic generation control (AGC), these changes effects of the power system performance also non-linearity properties of interconnected areas power system.The method is based to application of the fuzzy logic control (FL) and conventional proportional integral differential (PID) control for automatic generation control (AGC) system by using mathematical model and tools of MATLAB simulator, where automatic generation control (AGC) consists load frequency load control (FLC) loop of single or two area power system and automatic voltage regulator (AVR) loop in individual subsystem.When applied Fuzzy logic controller (FL) the result appeared the time response that consist rise and settling time is less and maximum over shoot is sort than applied conventional proportional integral differential (PID) controller for frequency load control (FLC)loop of two area power system with load disturbance. Also, in frequency load control (FLC) of single area power system and application of automatic voltage regulator (AVR) by used conventional proportional integral differential (PID) controller produced performance characteristics are better than fuzzy logic controller (FL)as shown is simulation

Ahlam Abdul-sada

الجامعة التكنولوجية · العراق

محمد الداودي, ياسين السخسوخ

كلية الطب والصيدلة-جامعة محمد الخامس بالرباط · المغرب

Les antibiotiques ont profondément modifié l’évolution par la guérison d’infections graves et constituent donc un bien précieux. Mais l’apparition de bactéries résistantes aux antibiotiques qui est un phénomène dynamique et évolutif et leur diffusion dans la population constitue un des phénomènes majeurs de ces dernières années et constituent un enjeu de Santé publique. En effet, la conservation de l’efficacité de ces médicaments est compromise, ce qui risque d’engendrer le retour à l’ère antérieure à la découverte des antibiotiques. Nous avons donc besoin d’antibiotiques, nous avons donc besoin d’antibiotiques qui restent efficaces. Compte tenu d’une perspective limitée d’arrivée de nouveaux antibiotiques, en particulier vers certaines cibles du fait d’une innovation thérapeutique stagnante, et vu l’inefficacité de certains anciens antibiotiques il demeure indispensable de préserver l’efficacité des antibactériens disponibles (anciens et nouveaux) en améliorant leur utilisation et en évitant leur mésusage.il faut donc respecter une prescription raisonnée de cette classe thérapeutique et ne pas banaliser ces médicaments indispensables.

Mritunjay Kumar Singh, Naser Salem Mohamed Salem Aldahmani

كلية العلوم-جامعة الإمارات العربية المتحدة · الامارات

Bathymetry is the study of the bed under the water's surface, giving us the water's depth. The Thesis will be about studying the coastal area of the UAE by using satellite images that can help access large regions of the UAE Coast. Also, by using a history of 5 years of satellite visible bands and NIR images, we can see the change of depth near the coastal. The benefit of that study will help to build ship baths through shallow water and to go in and out of ports of UAE. Early warnings of the sea level increasing near the urban areas near the coastal zone by Global warming is the main reason for the increase of sea level, which will change the depth of the location of fishing in the UAE sea. A coastal bathymetry study will help clarify the best place for fishing areas. All these studies can be done by remote sensing satellites in the visible range and NIR (Near Infrared). Knowledge of bathymetry is crucial for maritime applications, such as shipping, dredging, navigation, and engineering constructions. Marine applications have received help from recent advancements in satellite navigation technology, which can use multispectral bands to retrieve water depth information. Hence, this proposes to develop a coastal bathymetric map of areas of the UAE coast using optical satellite data and analyze the quality and accuracy of the derived bathymetric map. To derive the bathymetry of water areas, different algorithms are used in mapping the bathymetry. This project will use the linear band ratio (Ratio of Green and Blue bands) to derive the bathymetry map for Al Fujairah port and Delma Island using sentinel 2 Level 1C imagery. Multiple tools were used in the Sentinel Application Platform (SNAP) to derive the bathymetry of the two areas. The bathymetry derivation process implemented A set of procedures, including atmospheric correction, resampling, land masking, sun de-glint, and dark object subtraction. The Sen2coral processor was then used to manually confirm the steps using the software's sun de-glint and bathymetry deriving plugins.

Qassam Fathi Mohammad, امجد فؤاد عبدالعزيز

كلية الدراسات العليا-الجامعة العربية الأمريكية · فلسطين

Wissal Boukhari, Dehimi Souheyb

كلية الرياضيات والإعلام الآلي-جامعة محمد البشير الإبراهيمي - برج بوعريريج · الجزائر

صارة بلقاید , كریمة لریان , نورة طرطاق

كلية العلوم الانسانية والاجتماعية-جامعة مولود معمري - تيزي وزو · الجزائر

Feriel Bouzid

كلية الفيزياء-جامعة العلوم والتكنولوجيا هواري بومدين - الجزائر · الجزائر

Cette thèse est constituée de deux chapitres. Le premier traite en préliminaire, la présentation des instabilités paramétriques, en mettant l'accent sur l'instabilité de filamentation. Les aspects phénoménologique et théorique ont été abordés. Le chapitre deux, traite d'un nouveau modèle de l'instabilité de filamentation thermique. La contribution des effets pondéromoteurs ainsi que les effets de 1' absorption de 1' onde par bremsstrahlung inverse sur le transport, ont été également étudiées. Enfm, nous avons résumé nos résultats dans une conclusion.

رايس أسامة, صباح عبد الرحيم

كلية الحقوق والعلوم السياسية-جامعة قاصدى مرباح ورقلة · الجزائر

جــامعة قــاصدي مــرباح ورقـــلةكلية الحقوق والعلوم السياسيةقسم الحقوق

Berumen, Michael L., Monroe, Alison

جامعة الملك عبدالله للعلوم والتقنية · السعودية

Observing populations at different spatial scales gives greater insight into thespecific processes driving genetic differentiation and population structure. Here wedetermined population connectivity across multiple spatial scales in the Red Sea todetermine the population structures of two reef building corals Stylophora pistillata andPocillopora verrucosa. The Red sea is a 2,250 km long body of water with extremelyvariable latitudinal environmental gradients. Mitochondrial and microsatellite markerswere used to determine distinct lineages and to look for genetic differentiation amongsampling sites. No distinctive population structure across the latitudinal gradient wasdiscovered within this study suggesting a phenotypic plasticity of both these species tovarious environments. Stylophora pistillata displayed a heterogeneous distribution ofthree distinct genetic populations on both a fine and large scale. Fst, Gst, and Dest were allsignificant (p-value<0.05) and showed moderate genetic differentiation between allsampling sites. However this seems to be byproduct of the heterogeneous distribution, asno distinct genetic population breaks were found. Stylophora pistillata showed greaterpopulation structure on a fine scale suggesting genetic selection based on fine scaleenvironmental variations. However, further environmental and oceanographic data isneeded to make more inferences on this structure at small spatial scales. This studyhighlights the deficits of knowledge of both the Red Sea and coral plasticity in regards tolocal environmental conditions.