حورية بوكرامي, سامية عليوات, نورة الغطاس

كلية الاداب واللغات-جامعة اكلى محند أولحاج - البويرة · الجزائر

تعتبر الرواية من أهم الفنون الأدبية التي لقيت رواج اً كبي ا رً، فهي تعبر عن الواقع المعاش،ظهرت عند الغرب ثم انتقلت إلى قلوب العرب شيئ اً فشيئ اً، حتى أصبحت جنس اً مهيمنا في يومناهذا، فقد لقيت قبولا من طرف الدارسين والنقاد من جهة، والمتلقي من جهة أخرى، وللمكان أهميّةعظيمة في تشكيل البناء الروائي، بحيث يستحيل الاستغناء عنه لكونه ليس مجرد إطارٍ للأحداثوالشخصيات، إ نما هو إحدى العناصر الحية الفاعلة إذ يحتل الصدارة في القصة ليصبح جزءا هام اًمن الشخصية المحورية في السرد الحكائي، ونتيجة لهذا ارتأينا أن يكون موضوع د ا رستنا "البنيةالمكانية في رواية البحر ينشر ألواحه".

Hadji bourdoucen, مهدي عميري

كلية الهندسة-جامعة السلطان قابوس · عمان

The work of this thesis models and simulates a simplified Multikernel architecture. The work extends the initial approach of uniform kernels and system images for all cores to non-uniform kernels and system images for each core.In addition, the concept of calling kernel system-calls from other kernels and their applications has also been modeled to shift Multikernel from single system image to new hybrid system.As the Multikernel is more scalable compared to other contemporary architectures, the proposed model adds a number of benefits to this types of architectures. For instance, non-uniform kernels in Multikernel model allow existing mature kernels, such as Linux, to co-exist with modern and specialized kernels on a single machine.Based on experimental tests on ARMv7-A architecture, it was shown that each kernel in the developed model was able to provide inter-kernel system-calls to local applications with insignificant overhead cost compared to local system-calls.

علي شناوة وادي, مروة نزار يوسف البصري

كلية الفنون الجميلة-جامعة بابل · العراق

إبراهيم عي الموساوي, أحمد نزار حمزة

كلية العلوم والأداب-الجامعة الأمريكية في بيروت · لبنان

Studying the role of the marjiyya in Shiite community raises important questions with regard to the relation between religion and politics, state and society an d the relation between the marjas and the people. The marjiyya role in this rega rd is not res

Rima-Lia Marwan Dajani, مروان ير الدين, يوسف شبل

كلية العلوم والأداب-الجامعة الأمريكية في بيروت · لبنان

امل بن ضاحو, عائشة حميد

كلية علوم الطبيعة والحياة وعلوم الأرض-جامعة غرداية · الجزائر

This study investigates the toxic effects of aqueous foliar extracts of Peganumharmala L on the activity of the cholinesterase enzyme in adult Drosophila melanogaster inthe Sebseb region of Ghardaïa. P. Harmala leaves are harvested at Hay ELJADR, andsubjected to drying, grinding and reflux extraction. Toxicity tests are carried out at differentdoses of the aqueous extract of P.harmala L, treatment in vivo, either by contact (contacttoxicity and inhalation) or by consumption of food mixed with the leaf extract (toxicity byingestion ), Determines physiological parameters (lethal time 50 or LD50, mortality rate anddose 50 or LD50) and the in vitro treatment makes it possible to determine biochemicalparameters (cholinesterase activity, activity The in vivo treatment revealed a percentage ofmortality which increased as a function of the extract concentration applied: 55.55% forcontact treatment at the dose 80% of applied extract and 100% for treatment with Ingestion ata dose of 80%. The lethal time 50 (TL50) registers 8.80 hours with a lethal dose of 0.03mg /ml per contact, 33.7 hours with a dose of 0.005mg / ml per Treatment, toxicity of contacttreatment seems to be the most effective.However, treatment of Drosophila individuals invitro with different doses of P.harmala extract shows a significant decrease in the moreperceptible cholinesterase activity at the highest dose, 0.03 ± 0.02 nanomole / min / ml for the100% , In comparison with the cholinesterase activity in the control individuals, which isequal to 3.39 ± 1.24 nanomole / min / ml, thus showing a decrease in the level of proteins forall batches treated, the maximum decrease being noted at A pure dose, with 10.5 ± 6.71μg /ml, similarly a decrease in the specific activity is noted, the maximum decrease is at the puredose with 0.068 ± 0.048 nanomole / mn / μg. The aqueous foliar extract of P. Harmala hasinsecticidal and anticholinesterasic properties in D. Melanogaster.

Firas Salah Jarrar, Prashanth Marpu, Mahra Adel Alzarooni

جامعة خليفة · الامارات

CubeSats are a class of Nano Satellites that is defined by the CubeSat Design Specification (CDS). They are built to standard dimensions of 10 cm x 10 cm x 10 cm which is known as a 'Unit or U'. Each unit typically weighs less than 1.33 kg. For a successful CubeSat mission, several Subsystems work together to achieve the mission objectives. These subsystems occupy the majority of the CubeSat' total mass leaving a very minor portion/percentage of it for the structure. Therefore, mass reductions shall be made to a CubeSat structure to allow for additional weight to be used elsewhere. Furthermore, throughout its lifetime, a CubeSat is subjected to harsh operational loads such as extreme heating and cooling cycles and harsh launch loads such as high g-forces and vibration during lift-off. In order for a CubeSat qualify acceptance and function properly, it is expected to withstand the harsh conditions during launching. As a result, it is essential to optimize the design of the CubeSat structure to minimize the mass and volume while maximizing the stiffness. This type of optimization is known as Topological optimization, which basically includes the introduction of holes or cuts into the structure to minimize weight. This advancement plays a great role in the applicability of the generated designs since it allows for enhanced structural performance such as a high strength to weight ratio. Topology Optimization is approached in this research by first studying the geometric constraints retrieved from the CDS. Then, existing CubeSat Designs were compared to each other in terms of structure geometry and layout. A new CubeSat design was then developed based on ISIS' 1U CubeSat with altered ribs that were used in the optimization module. The Ribs of the CubeSat structure were topologically optimized at 4 different volume fractions (60,70, 80 and 90%) using two different designs; including a concave center and a hollow one. The Quasi-Static and Modal analysis of these designs were compared to ones of ISIS' and ones of the initial design which is considered as the maximum physical extent of the ribs geometry. These analyses were conducted on the structure alone and on structure with 5 subsystems to simulate a worse case launch scenario at 14g. All analysis and optimization processes were conducted using Abaqus. The new optimized designs were verified by confirming the margin of safety and meeting the launch vehicle frequency requirements. In Addition, the results were verified by the design of the existing 1U CubeSat Structure of ISIS since all values of maximum von Mises stress and deflection were similar to ones of ISIS.

رشا محمد عبد الوهاب إسحق, محمود علي احمد

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

The Book "The Leadership Star ", written by Mr. Iftikhar Khan,consists of 206 pages of medium-sized pages and is divided intoseven chapters. The book deals mainly with the concept ofleadership and tries to set up an independent space for the conceptof leadership within the related studies of administration science.The author believes that there is an evident confusion between theconcept of leadership and that of management among a largenumber of those who are interested in this subject, as they do nottend to differentiate between the two concepts.We have translated the first and second chapters in addition to a partof the third chapter of the book. The first chapter deals with theconcept of leadership and tries to find a definition by reviewingmany definitions from many writers in this field of studies. Thesecond chapter handles the theoretical framework of the leadershipconcept and sets boundaries between it and other misconceptionstaking the concept of leadership away from the concept ofmanagement. In the third chapter the author offers a presentation ofthe leaders’ tasks such as: strategic planning and supervision, andhints that it is not the job of the leaders to look after the routineworks, which should be done by themanagers.

LIYA QIAO, Fiza Hashmi

جامعة فرجينيا كومنولث - فرع قطر · قطر

فتح الرحمن إسماعيل خليفة, مسرة محمد محمد علي ريجي

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

The ongoing development of mobile devices and their applications increases the requirements for high data rates and large capacity of the wireless communication networks rapidly. There are Different types of wireless network systems have been developed to offer the user requirement and fitful anywhere and anytime bases. Typical examples of this wireless networks are UMTS, WIMAX and WLAN. An important issue is to integrate these heterogeneous networks and manage the mobile nodes while moving across heterogeneous networks with session continuity, lower handover failure between networks and reduce the number of unnecessary handover. To achieve this, it is important to find the right point in time to perform a handover between networks and to find a new network that, in fact, improves the connectivity over a reasonable time span.In this thesis, vertical handover techniques for mobile users were proposed in order to reduce the unnecessary handover and handover failure. By takes the receive signal strength (RSS), available bandwidth, Travelling time prediction and mobility as decision parameters. MATLAB-2013 simulation program is used to make handover decision. It is found that when the handover delay is ( 1s) the probability of unnecessary handover is equal ZERO. And when the handover delay is ( 455ms) the probability of unnecessary handover is equal 0.04. Therefore, the probability of handover failure when the handover delay is ( 1s) it is reduced by 69.28% .And when the handover delay is ( 455ms) the probability of handover failure is reduced by 85.71%.