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رسائل ماجيستير English 2022

Listening Assessment Strategies Employed by Libyan EFL University Teachers

عبدالسلام صالح طنطاني, هاجر احمد الشريف

كلية الآداب-جامعة الزاوية (السابع من ابريل سابقا) · ليبيا

Listening has been one of the neglected skills in teaching English as a foreign language in the Libyan context. However, teaching and assessing listening skills play important roles in the process of language teaching and learning. Therefore, EFL teachers should play effective roles in enhancing students’ achievements in listening skills by using different teaching strategies and various types of assessment. This research investigates the listening assessment strategies that EFL teachers’ use with undergraduate level at Zawia university. Moreover, it explores the challenges that teachers might encounter whenever they assess their students in listening classes. For this purpose, both quantitative and qualitative research methods were utilized in this research. Two sampling techniques were employed to select the research sample, namely simple random sampling and sampling. To collect the research data, a structured questionnaire was used to identify the teachers’ background knowledge and their use of assessment strategies in listening classes. In order to probe deeper and explore the challenges that teachers might encounter during listening assessment, six teachers who teach listening skills at Zawia university were interviewed in a semi-structured way. SPSS Software Program was used to analyse the quantitative data and Thematic Analysis Method was employed to analyse the qualitative data.The quantitative findings revealed that teachers use meta-cognitive, cognitive and socio- strategies when they assess students’ listening performance in different frequencies. For example, the results showed that the majority of the teachers always set goals for listening tasks, while it is evidenced that most of them rarely clarify the objectives of the anticipated listening tasks to the students. It was also found that most of the teachers neglected using cognitive strategies and - strategies when they assess their students in listening classes. Moreover, the qualitative findings showed that the teachers encounter different challenges, such as, limited background knowledge about using listening assessment strategies in class, choosing appropriate listening texts, setting listening tasks, scoring listening tests, teachers’ limited experience about assessing listening skills, lack of teaching listening resources and lack of training sessions. Finally, a number of interesting implications and recommendations are provided in this study.

ماستر (LMD) French 2022

Etude comparative de l’échangeur E504 de la section de décarbonatation par la solution de MEA du complexe GNL1/Z

Houria Belhouari , Khadidja Ahmed Baich, Leila Kaddour Drizi

كلية العلوم التكنولوجية-جامعة عبد الحميد بن باديس مستغانم · الجزائر

Le complexe GL1/Z a pour objectif la liquéfaction du gaz naturel pour faciliter son transport tout en réduisant son volume d’environ 600 fois. Parmi les problèmes vécus au niveau des unités de liquéfaction du gaz naturel (GL1Z), nous avons les problèmes d’encrassement de l’échangeur E504, Ce dernier permet de régler la température finale de la MEA pauvre qui vient d’être régénérée à 38°C, celle-ci passe côté calandre tandis que l’eau de mer de caractère corrosif est envoyé côté tube. Notre travail consiste à l’étude comparative de d’échangeur de chaleur E504 de la section décarbonatation entre les paramètres de (design, 2019,2022). Les résultats d’analyse des dépôts des faisceaux tubulaires de l’échangeur E.504, donnés par le laboratoire du complexe GL1/Z montrent la présence d’une grande quantité de sels de calcium et magnésium, ces dépôts formés peuvent boucher les tubes qui induit une diminution du transfert de chaleur entre l’eau de mer et la solution de MEA pauvre d’où un échauffement local du métal, ayant pour conséquence une baisse des caractéristiques mécaniques de l’échangeur. Etles calculs que nous avons effectués à travers les données du complexe nous ont également confirmé qu'il existe unencrassement de l’échangeur E-504 dans l’année 2019.

ماستر (LMD) English 2021

Anonymization of data in the IoT-Blockchain environment: Case Study - Electronic Health Record (EHR) in healthcare systems

Aymen Bebba, Bachir Dou, Saci Medileh

كلية العلوم الدقيقة-جامعة الشهيد حمة لخضر - الوادي · الجزائر

The critical nature of Electronic Health Records (EHR), and the technological advancement in the field of data privacy required researchers to come up with new strategies to handle EHRs in the healthcare industry. Many researchers have been investigating the possibility of integrating Blockchain technology to cloud-based EHR system architecture to increase the security of the health information within the system. However, EHR systems require more security to protect it for different attacks like Sybil Attacks and Linking Attacks. In this thesis, we propose a new data preservation mechanism called Anonymity Preservation Mechanism (APM), which provides another level of protection to health information of EHR systems by implementing a method of a multilayer cryptography to patient records. Moreover, this method splits patient records into two categories; identifiable information, and none identifiable information, implementing complicated hashing mechanism to the identifiable information which results a pseudo identities that do not link to the patient real identity, the none identifiable information go through an AES encryption method which uses a secret key to produce a secure ciphertext of the original data. Additionally, the generated outputs from the previous operations enter another phase of encryption by RSA cryptosystem, this multilayer encryption process produce a secure anonymized patient record. Furthermore, we integrated our proposed APM to our enhanced Blockchain-based EHR management system architecture. Lastly, we provided a prototype of our proposed APM and presented its implementation results in the system.

رسائل ماجيستير English 2023

CROSSLINKED CELLULOSE WITH TRIDENTATE COORDINATION SITES: SYNTHESIS AND APPLICATION IN EXTACTION OF TOXIC METAL IONS FROM WASTEWATER

إبراهيم أبو شقير , شاهي هاني محمود شاهين, عثمان حامد

كلية الدراسات العليا-جامعة النجاح الوطنية · فلسطين

Background: Water pollution that comes from industrialization and rapid urbanization has been considered as serious problem because water is one of the vital resources for life, and it is important to all humans, environment, society and economy. Heavy metals (Ag, Hg, Pb, Cr, Cu…) are among the contaminants that are of primary concern and need to be removed from waste water by various technologies that include adsorption as the wide used treatment process. Low cost and effective adsorbents from natural polymers are of great interest for heavy metal removal from waste water and researches have been directed toward modifying these natural adsorbents to enhance their adsorption efficiency. Objectives: The main goal from this work is to prepare a crosslinked carboxymethyl-cellulose polymer functionalized with 2-aminopyridine in order to make it excellent binder to heavy metal for application in waste water purification. Methodology: The method of preparing the polymer begins with a reaction between carboxymethyl cellulose (CMC) polymer and 2-aminopyridine to convert the carboxylic group into amide then crosslinking the prepared polymer by diethylene triamine (DETA) for extra stability. The resulting polymer was analyzed by Fourier Transform -Infra Red (FT-IR), Atomic Force Microscopy (AFM) and Thermal Gravimetric Analysis (TGA).Results: The percent removal of Cu2+ ion by the prepared polymer was investigated under the following parameters: temperature, time, pH, adsorbent concentration and adsorbent dosage. The maximum removal of Cu2+ by CMC/2-aminopyridine polymer is 92.25% at pH = 7.23, temperature 19 ⁰C, time 20 min, adsorbent concentration 20 ppm and polymer dose 10 mg. The adsorption isotherm, kinetics and thermodynamics were investigated to determine the mechanism and spontaneity of the adsorption process and the results revealed that it is exothermic (ΔH° < 0), spontaneous (ΔG° < 0) and occurs spontaneously at low temperatures (ΔS° < 0). The adsorption follows Pseudo-second order model with (R2 = 0.99) and the Langmuir adsorption isotherm was applied with (R2 = 0.93)Conclusion: The target polymer was prepared and confirmed by IR, it is thermally stable based on TG analysis and it results in high percent removal of the heavy metal. Keywords: Carboxymethylcellulose, Water pollution, wastewater treatment, heavy metals, Copper, 2-aminopyridine, DETA

ماستر (LMD) Arabic 2019

دور أجهزة الرقابة المباشرة في تطبيق مبادئ حوكمة الشركات: دراسة حالة استبيان

السعيد خلف , محمد غوالي

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة قاصدى مرباح ورقلة · الجزائر

الجمهورية الجزائرية الديمقراطية الشعبيةوزارة التعليم العالي والبحث العلميجامعة قاصدي مرباحكلية العلوم الاقتصادية وعلوم التسيير ورقلة

ماستر (LMD) Arabic 2018

تقييم دور نظم المعلومات المحاسبي في تعزيز جودة المعلومات المالية: دراسة ميدانية لعينة من المهنيين

بدوي إلياس , غدايري إلهام

كلية العلوم الاقتصادية والتجارية وعلوم التسيير-جامعة قاصدى مرباح ورقلة · الجزائر

جامعة قاصدي مرباح – ورقلةكلية العلوم الاقتصادية والتجارية وعلوم التسييرقسم العلوم التجارية

رسائل دكتوراة French 2015

CONTRIBUTION A L'ÉTUDE DES PROPRIÉTÉS PHYSICOCHIMIQUES DES ALLIAGES D'HEUSLER

Bouhalouane Amrani, Hamza Abbassa

كلية العلوم الدقيقة والاعلام الآلي-جامعة عبد الحميد بن باديس مستغانم · الجزائر

By mean of different numerical methods, many theoretical studies predict severalintermetallic Heusler compounds to be half metals at room temperature. This class ofmaterials is usually in base of spintronic applications or devices, where a relatively high Curietemperature is required in this field of applications, and 100% spin polarization at Fermi levelis desirable.This kind of compounds is classified in two categories: Half-Heusler and Full-Heusler,according to several crystallographic structures and magnetic orders.Among those compounds, a ferromagnetic class based on cobalt (Co) is promising, whichreceived an importance attention in several theoretical studies.In this work, we have used the ab initio method in order to explore structural, elastic,mechanic, electronic, magnetic and thermodynamic properties of compounds based on Co,Rh, Ru and NiMn(Sn,Sb) Half-Heusler.

عنوان الوثيقة المؤلف النوع اللغة التاريخ
Listening Assessment Strategies Employed by Libyan EFL University Teachers عبدالسلام صالح طنطاني, هاجر احمد الشريف رسائل ماجيستير English 2022 فتح ←
Etude comparative de l’échangeur E504 de la section de décarbonatation par la solution de MEA du complexe GNL1/Z Houria Belhouari , Khadidja Ahmed Baich, Leila Kaddour Drizi ماستر (LMD) French 2022 فتح ←
Anonymization of data in the IoT-Blockchain environment: Case Study - Electronic Health Record (EHR) in healthcare systems Aymen Bebba, Bachir Dou, Saci Medileh ماستر (LMD) English 2021 فتح ←
CROSSLINKED CELLULOSE WITH TRIDENTATE COORDINATION SITES: SYNTHESIS AND APPLICATION IN EXTACTION OF TOXIC METAL IONS FROM WASTEWATER إبراهيم أبو شقير , شاهي هاني محمود شاهين, عثمان حامد رسائل ماجيستير English 2023 فتح ←
مهارات التعبير الكتابي و دورها في تعلم اللغة العربية لدى تلاميذ السنة الخامسة أبتدائي أسماء عبة, دليلة مزوز ماستر (LMD) Arabic 2015 فتح ←
أثر ممارسات القٌادة الإستراتيجية أداء المنظمة : دراسة حالة وزارة التعليم العالي - الإدارة المركزية حلا حمود, مجد صقور رسائل ماجيستير Arabic 2018 فتح ←
دور أجهزة الرقابة المباشرة في تطبيق مبادئ حوكمة الشركات: دراسة حالة استبيان السعيد خلف , محمد غوالي ماستر (LMD) Arabic 2019 فتح ←
تقييم دور نظم المعلومات المحاسبي في تعزيز جودة المعلومات المالية: دراسة ميدانية لعينة من المهنيين بدوي إلياس , غدايري إلهام ماستر (LMD) Arabic 2018 فتح ←
CONTRIBUTION A L'ÉTUDE DES PROPRIÉTÉS PHYSICOCHIMIQUES DES ALLIAGES D'HEUSLER Bouhalouane Amrani, Hamza Abbassa رسائل دكتوراة French 2015 فتح ←
Application des techniques de commande avancées pour la stabilisation des réseaux d’énergies électriques Hsan Hadj Abdallah, Omar Kahouli, Rim Ben Salah رسائل دكتوراة French 2019 فتح ←