فارس فضيل, مرابط محمد

كلية العلوم الاقتصادية والعلوم التجارية وعلوم التسيير-جامعة الجزائر 3 - إبراهيم سلطان شيبوط · الجزائر

تعتبر حركة الإستثمار الأجنبي المباشر والتجارة الخارجية جوهر عملية العولمة وحركة رؤوس الأموال والسلع عبر الحدود، مما أسهم في ظهور جدل واسع في طبيعة العلاقة بينهما (تكامل أو تبادل؟) في ظل التحولات الإقتصادية الراهنة. وقد هدفنا من خلال هذه الدراسة إلى تقييم أثر مساهمة الإستثمار الأجنبي المباشر على التجارة الخارجية (الصادرات والواردات) في بعض الدول العربية (الجزائر، مصر، المملكة العربية السعودية والإمارات العربية المتحدة)، باستخدام نموذج الجاذبية المعدل. وقد تبين من خلال نتائج تقدير نموذج الصادرات إلى وجود علاقة تكاملية بين الإستثمار الأجنبي المباشر والصادرات في كل من الجزائر، السعودية والإمارات غير أن مستوى التأثير ضعيف جدا في الجزائر مقارنةبالسعودية والإمارات، في حين وجود علاقة إحلالية في مصر. كما توصلنا من خلال نموذج الواردات إلى وجود علاقة تكاملية بين الإستثمار الأجنبي المباشر والواردات في الدول الأربع.

Atia Ibrahim Atia Shalaby, John McKenny

الجامعة البريطانية في دبي · الامارات

This study investigates the acquisition of the English articles system by Arab sophomores in Sharjah in the UAE, one group being taught through the medium of English and the other through the medium of Arabic. The main focus of the study is the extent to which the medium of instruction affects the acquisition of the articles system. The role of mother tongue transfer in this process is also examined. Initially a quick placement test was applied to exclude low-achievers, and then two instruments were adopted. The first instrument is an English article forced-elicitation task which comprises thirty contexts; eighteen of them are adopted from Ionin, Ko and Wexler (2004), but with some modifications, the other twelve are generated by the researcher to meet the objectives of this study. The participants completed this task within a fifty-minute class period. The second instrument is a written argumentative essay, in which the participants are asked to choose one of three assigned topics and to produce a 250-word essay in their own time away classroom constraints. The samples of the study are 158 male Arab sophomores; 104 are from Arab medium of instruction whereas the rest 54 are from English medium of instruction high schools. The findings reveal that the EMI group significantly (p<0.005) outperforms their peers in the AMI environment in the acquisition of the EAS. The findings are interpreted in the light of the participants’ L1 Arabic influences. The pedagogical implications of the study are discussed in the final part of the dissertation and recommendations are made for further studies.

زياد كريمي, سماح بن فرح

المعهد العالي لأصول الدين-جامعة الزيتونة - تونس

Fatima Zohra Ouhadj, B.Bouhafs

كلية العلوم-جامعة أبو بكر بلقايد - تلمسان · الجزائر

Ce travail évoque une description théorique d’un capteur à résonanceplasmon de surface. C’est un dispositif monocouche dont la réponse optique estanalysée en réflexion totale d’une onde TM de longueur d’onde dans le spectrevisible. Dans deux types de modèles pour les propriétés optiques d’unmatériau conducteur (en contact avec un diélectrique) sont présentés pourdégager le potentiel du capteur RPS.

أحمد نجاح جبار, ابراهيم عبدالله مرداس, غدير حيدر اسكندر

كلية الهندسة-جامعة بابل · العراق

The communication systems are playing a major role in modern societies by connecting the people around the world. Therefore, reliable stable and dependable links are required. The excess demands for higher bitrates gave birth for the new technology in communication which is called 5G (fifth Generation). This generation promised to provide, theoretically, to transport huge data loadswith minimum delays and power requirements.Unfortunately, the Orthogonal Frequency Division Multiplexing (OFDM) is excluded from the 5G despite its long service time and reputation. The exclusion is due to the inherited complexities and time delays of the OFDM that comes from the nature of the Fast Fourier Transform circuit and its Inverse (FFT/IFFT). These problems prevented the OFDM from further participation in the 5G as these problems contradicts the 5G foundation requirements.This thesis suggests that the OFDM can still be a qualified competitor to other suggested 5G system if the FFT/IFFT are redesigned based on a full parallel architecture. To accomplishes this parallelism, it is necessary to reinventthe FFT/IFFTfrom ground zero benefittingfrom itssymmetry and recurrence. Thus, a new algorithm which is MultiRadix FFT (MRFFT) was invented that adoptedthe adaptive radix increment in the construction of FFTrather than fixed radix. This algorithm ensures the need for only 2 stages to complete the transformationfor anynumber ofpointsusing MRFFTresulting into: it requiresthe least time to complete the transformation, least complexity, minimum fabrication space and lowest consumed power for operation. This algorithm was used to design a 16 FFT circuit andby comparingthe results against the theoretical FFT, MRFFT showed that it can operate almost exactly as the theoretical FFT. The MRFFT in this thesis operates on 100 MHz clock, 32 bits fixed point number and 16 subcarriers at the output. Therefore, MRFFT, here, operates at 51.2 Gbit/sec for the real and imaginary part with total 102.4 Gbit/sec. The other addition to the OFDM system proposed by the thesis is a new design for the QAM MODulator DEModulator (MODEM)to operate in parallel mode with minimum hardware requirements.The new design will work independently of constellation size which allows the system to increase its data rate without any added time delays.The new MODEM operates with bit rate equals to 320 Mb/sec for the real and imaginary and total bitrate equals to 640 Mbit/sec. The final parallel OFDM is tested under the effect of Additive White Gaussian Noise and the Multipath fading channel by transmitting 106 symbols over an emulated channel. The performance exceeds by all measures the currently know commercial OFDM system due the inherited speed after implementing the parallel data processing in the design. After confirming the validity of operation, the system is implemented on an FPGA card, Arty A7 35T, and used to transmit a gray scale photo.An extra contribution presented by this thesis, is the design of achannelemulator to induce the effect of areal nonlinear channel using FPGA card. All the design steps and the necessary theories and calculations are discussed thoroughly to enable any user to upgrade or modify the channel according to the project’s needs.The final design is simple, friendly to use and inexpensive which allows it to be the first choice for any channel nonlinearity test

Abdelhamid Ahmed Ouali, M. Boudour

كلية المعلوماتية والالكترونيات-جامعة العلوم والتكنولوجيا هواري بومدين - الجزائر · الجزائر

L'analyse de la stabilité transitoire traite de la capacité d'un réseau d'énergie électrique à atteindre un régime permanent acceptable suite à une grande perturbation. Notre étude porte sur l'évaluation de la stabilité transitoire des réseaux électriques par les réseaux de neurones artificiels (RNA) optimisés par la méthode des plans d'expériences (MPE). La technique d'apprentissage automatique, issue de l'intelligence artificielle s'est avéré un outil puissant d'analyse et d'interprétation des données en temps réel. Elle est, par ailleurs, capable de s'adapter automatiquement avec une capacité de généralisation excellente. Dans le cadre de notre étude, nous visons à élaborer une technique d'optimisation, basée sur les plans d'expérience, permettant de réduire la taille du vecteur d'entrée du réseau de neurones, pour une meilleure évaluation de l'état du réseau électrique suite à des perturbations sévères.

أرام أحمد محمد, محمد عبدالعزيز قادر

كلية الطب البيطري-جامعة السليمانية · العراق

تماضر محمد عبدالقادر الفقي, حمزة أحمد حسن

كلية الدراسات العليا والبحث العلمي-جامعة شندي · السودان

Background: Ischemic heart disease (IHD), is a group of diseases that includes: stable angina, unstable angina, myocardial infarction, and sudden cardiac death. It is within the group of cardiovascular diseases of which it is the most common type. The aim of the study was to evaluate the prothrombin time and Activated partial thromboplastin time and D.dimer level in ischemic heart disease patients.Method: This is a cross-sectional descriptive study conducted at El-Mek Nimir University Hospital in Shendi town to evaluate the prothrombin time, activated partial thromboplastin time and D.dimer level in ischaemic heart disease patients in the period between (April – October 2018). The study included (30) patients who were diagnosed as ischemic heart disease and the study groups were compared with (20) healthy volunteers as a control group.Blood samples were collected from the patients to evaluate the level of prothrombin time and Activated partial thromboplastin time and D.dimer. Data was collected using a structured face to face questionnaire and the (SPSS) version (11.5) program was used for data analysis.Results: The study revealed that the ischemic heart disease patients were; (53%) male and (47%) female.Also prevailed the mean of PT, APTT and D.dimer are 16.94 sec, 42.10 sec and 720ng/ml respectively.Conclusion: Ischemic heart disease is responsible for significant changes in prothrombin time, partial thromboplastin time and highly significant change in D.dimer level.The study also showed that there was no statistically significant relationship to the age of ischemic patient on the level of PT, APTT and D.dimer

Kenza Ouasli , Amel Benbouya-Beggah, Kahina Oudjedoub

كلية الآداب واللغات-جامعة عبد الرحمان ميرة - بجاية · الجزائر

English as a foreign language (EFL) learners’ willingness to communicate in the foreign language (FL) is indispensable in attaining their language learning objectives. Willingness to communicate (WTC) is a concept which assimilates linguistic, communicative, and psychological variables to explain foreign or second language (FL/SL) communication. Nonetheless, most teachers nowadays complain about students’ unwillingness to speak English in FL classroom sessions. Students may show a good performance in skills such as reading, listening, and writing, but when it comes to speaking, they become passive or unwilling to speak in the classroom because of psychological, linguistic or maybe other affective barriers. Thus, the current study aims to explore the factors that detriment students’ WTC in the classroom following an exploratory design. The population of this research consists of third year LMD students at the department of English, University of Bejaia. The sample of the study is composed of fifty students and five teachers enrolled in the same department. To attain our study aims and to find answers to the research questions, we relied on a quantitative method to collect data, and a mixed method comprising both quantitative and qualitative methods to analyze the collected data. The data was gathered through two instruments: a questionnaire directed to students in addition to another one distributed to teachers. The results obtained from the data analysis revealed that the major hindering factors that block students from classroom communication are shyness, stress, fear of making mistakes, lack of vocabulary in addition to lack of language proficiency, anxiety and lack of motivation. Overall, the results of the study answered our research questions and the objectives behind this investigation are fulfilled. Lastly, helpful techniques and strategies are suggested on how third year students’ willingness to communicate in the classroom can be boosted

حمادي عبد القادر, كحلي احمد, واضح احمد الامين

معهد علوم وتقنيات النشاطات البدنية والرياضية-جامعة أحمد بن يحيى الونشريسي - تيسمسيلت · الجزائر