Mutasim Ahmed Abdelmawla Mohamed, Hiba Ahmed Hamd Alneel Salim, Omarn Abbas Yousif Abdallha

كلية الاقتصاد والتنمية الريفية-جامعة الجزيرة · السودان

Electronic banking operations contribute to save time and reduce effort, recently banking technology has become a reality and an important for institutions in general and financial institutions, in particular. This research aimed at investigating the role of banking services in the efficiency of banks in Sudan: a case study of Bank of Khartoum (2016). The research depended on primary data collected by a questionnaire, distributed to a random sample of 100 employees of the Bank of Khartoum. The research used descriptive methodology as frequencies and percentages to show the basic characteristics of respondents, also an analytical descriptive methodology was adopted (LGIT) model for estimating the relationship between the bank's efficiency as a dependent variable and some explanatory variables, namely; computer services (CS), automated teller machine (ATM), electronic clearing service (ECS), and electronic transaction service (ETS). The research used the Statistical Packages for Social Sciences (SPSS) program to analyze the data. The results of the research showed that there was a positive significant relationship between the bank's efficiency and electronic clearing services (ECS), whereas there were positive insignificant with (computer services (CS), and automated teller machine (ATM)). Also there was a negative relationship between the bank's efficiency and electronic transaction. The research recommended that it's necessary to introduce modern technologies in banking transactions, in order to raise the efficiency of banks.

ابتهال صديق أحمد محمد , الفاتح احمد حسن

كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان

In this study Neem oil was extracted using normal hexane and giving high yield(44.37), then physico-chemical properties were determined. Due to high free fattyacid content of Neem oil (6.6), acid pretreatment process was carried out usingmethanol in the presense of 2% w/w H2SO4 as an acid catalyst at 60ºC. Then theresulting treated oil with low free fatty acid content (1.8) undergo alkalinetarnsesterification to produce biodiesel.

رنيم جمال دراج, محمد هارون

كلية الصيدلة-جامعة تشرين · سوريا

Rolla Emad Bou Hamdan, Simon Neaime

كلية العلوم والأداب-الجامعة الأمريكية في بيروت · لبنان

The financial shock that erupted in the third quarter of year 2007, as the US sub-prime mortgage market was derailed by the reversal of the housing boom, has spread quickly and unpredictably to inflict extensive damage on markets and institutions at the h

محمود الشمالي, امال سمير, غسان السفاريني

كلية الدراسات العليا-جامعة النجاح الوطنية · فلسطين

ﻫدﻓت اﻟدراﺴﺔ إﻟﻰ ﺘﻘﺼﻲ أﺜر اﺴﺘﺨدام اﺴﺘراﺘﯿﺠﯿﺔ البيت الدائري ﻓﻲ التفكير الناقد ومفهوم الذات الأكاديمي ﻟدى طﺎﻟﺒﺎت الصف السابع اﻷﺴﺎﺴﻲ ﻤﻘﺎرﻨﺔ ﺒﺎﻟطرﯿﻘﺔ اﻻﻋﺘﯿﺎدﯿﺔ. ﺤﺎوﻟت اﻟدراﺴﺔ اﻹﺠﺎﺒﺔ ﻋن اﻟﺴؤال اﻟرﺌﯿس: ﻤﺎ أﺜر اﺴﺘﺨدام اﺴﺘراﺘﯿﺠﯿﺔ البيت الدائري ﻓﻲ التفكير الناقد ومفهوم الذات الأكاديمي ﻟدى طﺎﻟﺒﺎت الصف السابع اﻷﺴﺎﺴﻲ؟وللاجابة عن السؤال الرئيس وأسئلته الفرعية ومن أجل جمع البيانات اللازمة تم تطبيق الدراسة على عينة قصدية مكونة من (64) طﺎﻟﺒﺔ ﻤن طﺎﻟﺒﺎت الصف السابع اﻷﺴﺎﺴﻲ ﻓﻲ ﻤدرﺴﺔ ﺒﻨﺎت قلقيلية الأساسية اﻟﺘﺎﺒﻌﺔ ﻟﻤدﯿرﯿﺔ اﻟﺘرﺒﯿﺔ واﻟﺘﻌﻠﯿم ﻓﻲ ﻤﺤﺎﻓظﺔ قلقيلية وﻗد درﺴت طﺎﻟﺒﺎت ﻋﯿﻨﺔ اﻟدراﺴﺔ وﺤدة "التكاثر في النباتات" ﻤن ﻛﺘﺎب العلوم للصف السابع اﻷﺴﺎﺴﻲ ﻓﻲ ﻤﺠﻤوﻋﺘﯿن ﺘﺠرﯿﺒﯿﺔ درﺴت ﺤﺴب اﺴﺘراﺘﯿﺠﯿﺔ البيت الدائري، وﻀﺎﺒطﺔ درﺴت ﺤﺴب اﻟطرﯿﻘﺔ اﻻﻋﺘﯿﺎدﯿﺔ، ﻓﻲ اﻟﻔﺼل اﻟدراﺴﻲ اﻟﺜﺎﻨﻲ ﻟﻠﻌﺎم (2017/2016).وﻟﺘﺤﻘﯿق أﻫداف اﻟدراﺴﺔ ﺘم إﻋداد اﺨﺘﺒﺎر التفكير الناقد، ومقياس مفهوم الذات الأكاديمي، ودﻟﯿل اﻟﻤﻌﻠم ﻟطﺎﻟﺒﺎت اﻟﻤﺠﻤوﻋﺔ اﻟﺘﺠرﯿﺒﯿﺔ.وأظﻬرت ﻨﺘﺎﺌﺞ ﺘﺤﻠﯿل اﻟﺘﺒﺎﯿن اﻟﻤﺼﺎﺤب ANCOVA, عدم وﺠود ﻓرق دال إﺤﺼﺎﺌﯿﺎً ﺒﯿن ﻤﺘوﺴطﺎت ﻋﻼﻤﺎت اﻟطﺎﻟﺒﺎت ﻋﻠﻰ اﺨﺘﺒﺎر التفكير الناقد اﻟﺒﻌدي, ﻛﻤﺎ أظﻬرت وﺠود ﻓرق دال إﺤﺼﺎﺌﯿﺎً ﺒﯿن ﻤﺘوﺴطﺎت ﻋﻼﻤﺎت اﻟطﺎﻟﺒﺎت ﻋﻠﻰ مقياس مفهوم الذات الأكاديمي اﻟﺒﻌدي ﻟﺼﺎﻟﺢ أﻓراد اﻟﻤﺠﻤوﻋﺔ اﻟﺘﺠرﯿﺒﯿﺔ، ﻛذﻟك أﺸﺎرت اﻟﻨﺘﺎﺌﺞ إﻟﻰ وﺠود ﻋﻼﻗﺔ ارﺘﺒﺎطﯿﺔ ﻤوﺠﺒﺔ ذات دﻻﻟﺔ إﺤﺼﺎﺌﯿﺔ بين التفكير الناقد ومفهوم الذات الأكاديمي.وﻓﻲ ﻀوء اﻟﻨﺘﺎﺌﺞ اﻟﺘﻲ ﺘم اﻟﺘوﺼل إﻟﯿﻬﺎ أوﺼت اﻟﺒﺎﺤﺜﺔ باجراء دراسات حول أثر استراتيجية البيت الدائري على التفكير الناقد مع ضرورة زيادة الفترة الزمنية لتطبيقها, وتنفيذ أنشطة وتدريبات بشكل يماثل ما تم تنفيذه من أنشطة وتدريبات لاستراتيجية البيت الدائري, بالاضافة إلى ضرورة إدراج ﻫذﻩ اﻻﺴﺘراﺘﯿﺠﯿﺔ ﻓﻲ ﻛﺘﺎب دﻟﯿل اﻟﻤﻌﻠم ﻟﻠﻤﻨﻬﺎج ﺒﻬدف ﺘﻨوﯿﻊ طرق اﻟﺘدرﯿس, وكذلك ﻋﻘد دورات ﺘدرﯿﺒﯿﺔ ﻟﻠﻤﻌﻠﻤﯿن؛ ﻟﺘدرﯿﺒﻬم ﻋﻠﻰ ﻛﯿﻔﯿﺔ ﺘوظﯿف اﺴﺘراﺘﯿﺠﯿﺔ اﻟﺒﯿت اﻟداﺌري ﻓﻲ العلوم، وﻓﻲ ﻛل اﻟﻤواد.

Ilyas Taqiy Eddine Boudjellal, Derbal Mourad

جامعة سعد دحلب البليدة · الجزائر

Les matériaux doubles tungstate d'éléments alcalins et d'éléments trivalents sont devenus des composés activement étudiés pour leurs propriétés optiques remarquables. Dans ce mémoire nous avons étudié les propriétés structurales, optique et vibrationnelles de matériaux double tungstates AB(XO4)2 [A=Li, Na, k; B=AI, Lu; X=W, Mo] que nous avons dopé par les ions terre rare trivalent Eu3+ et Tb3+Pour cette étude, nous avons analysé par diffraction des rayons X les structures cristallines de nos composés. L'utilisation des logiciels d'identification XPert High Score Plus nous ont permis de trouver la structure, la plus probable, du composé synthétisé ainsi que l'évolution des paramètres de mailles en fonction de la concentration. Nous avons ainsi pu observer l'évolution des changements structuraux apparus au cours des traitements thermiques. Nos composés ont été analysés au moyen d'un MEB, pour la morphologie, et I'EDS pour la constitution chimique. La spectroscopie d'absorption infrarouge et la spectrophotométrie d'absorption diffuse a été utilisée pour les propriétés optiques. Les résultats obtenus ont permis de discuter les modes de vibrations et leur absorbance optique.

Kamal Amroun, Nadim El Sakaan, Nassim Merri, Walid Bouhaoui

كلية العلوم الدقيقة-جامعة عبد الرحمان ميرة - بجاية · الجزائر

Nous vivons à une époque où les données sont générées par tout ce qui nous entoure. Le tauxde génération de données est si alarmant qu'il a créé un besoin pressant de mécanismes de stockageet d'extraction de données faciles et rentables. En outre, de grandes quantités de données doiventêtre analysées pour en tirer des bénéfices et établir des relations d'attributs, ce qui peut conduireà une meilleure prise de décision et à des stratégies commerciales efficaces. Les grandes donnéesnous permettent d'en apprendre davantage sur les nouvelles technologies, les compétences et lesprocessus de notre architecture d'information et sur les personnes qui les exploitent, les conçoiventet les utilisent. Hadoop Distributed File System, également connu sous le nom de HDFS, et HadoopMapReduce sont suffisamment bons pour mettre en évidence les implications des Big Data sur lemarché. Dans ce rapport, nous présentons la mise en œuvre d'un cluster hadoop pour stocker et analyser de grandes quantités de données.

Ahmed Mohammed Adham, Banipal Nanno Yaqob, Bashir Eskander Kareem

کلية أربيل التقنية الهندسية-جامعة بوليتكنك أربيل · العراق

Global energy consumption has risen over the past decade, driven by the growth in population and the economy. The building sector is the largest energy consumer, accounting for 40% of total energy and causing one-third of CO2 emissions. Half of building energy consumption goes to HVAC systems. Thermal energy storage offers an excellent method for providing sustainable energy that can be utilized for free cooling, heating, and ventilation in buildings. The free cooling system stores thermal energy in thermal energy storage during the night and utilizes it throughout the day. Latent heat thermal energy storage is recommended due to its high energy capacity, minimal impact on temperature and volume changes. The primary challenges associated with integrating PCM in free cooling systems pertain to the thermophysical properties of PCM itself and the system's reliance on climatic conditions. In hot climates, solidifying PCM may encounter challenges. As a potential solution, there is a proposal to incorporate an evaporative cooling system with a PCM-to-air heat exchanger, with the goal of facilitating the PCM solidification process. In this study, the enthalpy method has been employed in the CFD model for the PCM-to-air heat exchanger, and the EES model has been utilized for the entire system. The system consists of a multi-stage evaporative cooler and a PCM-to-air heat exchanger. According to the CFD findings, the melting and solidification time is reduced with decreasing PCM panel thickness, decreasing air channel height, increasing PCM panel length, and higher flow rate of HTF. The main parameter to change melting and solidification time is the temperature difference between HTF and PCM’s melting temperature. The primary objective of this study is to design, construct, and develop a cooling and ventilation system that incorporates both evaporative cooling and a PCM-to-air heat exchanger. The system employs organic paraffin-based PCMs-RT21HC and RT25HC, arranged in series to reduce melting and solidification durations. Experimental and numerical findings demonstrate that starting with PCM RT21HC in the heat exchanger reduces solidification time, while initiating with PCM RT25HC shortens the melting time. Also, the results clearly demonstrate that the solidification time is significantly longer compared to the melting time. PCMs completely melt in less than 4 hours, whereas PCM-RT21HC does not solidify completely even after 12 hours. Utilizing PAHX without a cooling system can provide thermal comfort for less than 4 hours, but when combined with evaporative cooling, the PCMs can solidify, enabling the system to operate continuously and effectively. The system offers cooling and ventilation, effectively extending indoor thermal comfort by stabilizing the outlet air temperature through the use of PCM to air heat exchanger. Typically, the supply air temperature to the conditioned space ranges between 21 to 25°C.

سعيد فالح الغامدي, عبد الله حمود العنزي

كلية الدراسات العليا-جامعة نايف العربية للعلوم الأمنية · السعودية

مشكلة البحث : تتحدد مشكلة الدراسة في دور الأخصائي الاجتماعي داخل المؤسسات الإصلاحية حيث أن دوره يعتبر دوراً هامشياً وأن عمله يعتبر عملاً إدارياً بحتاً وسعت الدراسة إلى تفعيل دور الأخصائي الاجتماعي في التعامل مع المشكلات الاجتماعية لنزلاء السجون . أهمية البحث :

Youcef Ousaadi, Saiah

كلية علوم الطبيعة والحياة-جامعة عبد الحميد بن باديس مستغانم · الجزائر

Aphids are classified today among the most disastrous insect pests of citrus seen the colossal damage and the economic losses that the colonies of this insect cause. In the hope of finding new biological alternatives to the harmful chemical means in order to eliminate this permanent peril, an initial experimentation of two biological tests was conducted; mortality and repulsion test of methanoid extracts of rosemary (rosmarinus officinalis) and sage (Salvia officinalis) on adults of the green citrus aphid Aphis spiraecola. The test asserted that the extracts tested caused the mortality and repulsion of the aphidien populations. The mortality was in perfect increase on the one hand with the duration of exposure to the biocides, and on the other hand with the dose administered. It was also confirmed that rosemary extract had a lethal effect (LD50: 0.26%) and repellent (PR: 40%) much more than the extract of sage (LD50: 2.71%, PR: 26.66%). Thus, the methanolic extract of can annihilate 50% of Aphis spiraecola in a dose of 0.26% after five days of exposure to the pesticide only.