المستودع الرقمي لـجامعة طرابلس

تهدف هذه الدراسة إلى قياس أثر الصادرات على النمو الاقتصادي في الاقتصاد الليبي باستخدام بيانات السلاسل الزمنية السنوية للفترة من 1988 إلي 2018. باستخدام طرق القياس الاقتصادي من خلال فحص استقرارية السلاسل الزمنية وذلك بتطبيق اختبار ديكي- فولر ) Dickey-Fuller Test ( و فليبس – بيرون phillip perron)(pp) واستخدام اختبار الحدود Bounds Tet للكشف عن وجود تكامل مشترك بين متغيرات الدراسة وتقدير العلاقة بينهما في المديين الطويل و القصير باستخدام نموذج الانحدار الذاتي للإبطاء الموزعة " ARDL " Autoregressive Distributed Lag ، وكشفت النتائج المتحصل عليها أن الصادرات تؤثر ايجابيا على النمو الاقتصادي في المديين الطويل والقصير و تقترح الدراسة أنه يجب على ليبيا تنفيذ وتطبيق استراتيجيات ترويج وتنويع وتوسيع الصادرات كجزء من استراتيجيتها التنموية المناسبة لتحقيق النمو الاقتصادي المستدام.
محمد سليمان عبيد, عبدالسلام مسعود ارحومة(3-2020)

تناولت هذه الدراسة موضوع ظاهرة التهرب الضريبي والتهريب الجمركي مع إشارة خاصة للاقتصاد الليبي، وذلك باعتبار الدور المهم والأساسي، الذي تؤديه الضرائب والرسوم الجمركية في النشاط الاقتصادي؛ من حيث كونها إيرادات فعلية غير نفطية، فقد اهتمت هذه الدراسة بتحليل وعرض النظام الضريبي الليبي، من خلال قانون الضرائب المعمول به في ليبيا، وتحليل نسب مساهمة الضرائب والرسوم الجمركية في كلل من إجمالي الإيرادات الفعلية غير النفطية والناتج المحلي الجمالي خلال الفترة .2015 - 1990 توصلت الدراسة إلى أن ارتفاع معدلات الضريبة، والقصور في التشريعات الضريبية وعدم تحديثها بصورة دورية، وضعف الجهاز الإداري، أدى إلى زياادة ظاهرة التهرب الضريبي والتهريب الجمركي، وهذا بدوره له أثر سلبي على التنمية في ليبيا، وكذلك إضعاف بنية الدولة وركائزها السياسية والاقتصادية والأمنية.
محمد سليمان عبيد, طارق الهادي العربي(4-2017)

Abstract Teacher self-evaluation is an important dimension in the overall evaluation activities in educational programs. However, this dimension is often overlooked and not given its right share of importance. Teacher self-evaluation is neither included in teacher training programs nor is considered a basic requirement from teachers as they develop in their careers. The significance and value of teacher self-evaluation as a core element in continuing professional development requires that self-evaluation proceed all other forms of evaluation. To support the claim that teacher self-evaluation is a missing element in the area of investigation, the researchers conducted a study which adopted a survey that involved eleven schools and 86 Libyan teachers. The results of the study showed that while many teachers perform some sort of self-reflection about their teaching, they do not recognize self-evaluation as a basic requirement in developing their career. When the effectiveness of teacher self-evaluation was probed in contrast to external evaluation, most teachers agreed that teacher self-evaluation could play a far more vital role in continuing professional development. Keywords Continuing Professional development, External evaluation, Self- evaluation.
Fawzia Mohamed Elwafi, Yousra Ali Aghanimi, Fahima Mohamed Bannur(4-2021)

يعد الشاي من أكثر أنواع المشروبات استهلاكا وله العديد من الفوائد لوجود العناصر الغذائية فيه خاصة العناصر الاساسية والعناصر النادرة، تم في هذه الد ا رسة تقدير محتوى الحديد الكلي لعدد 17 عينة من علامات تجارية مختلفة للشاي المتواجدة في السوق الليبي، تم تحضير العينات عن طريق الهضم الجاف وتم تقدير مستوى الحديد عن طريق القياس الطيفي، وأظهرت النتائج أن تركيز الحديد تا روح ما بين ) 0.1 إلى 2.5 مجم / لتر( بمتوسط قيمة ) 0.520 مجم / لتر(، لوحظ أقل تركيز ) 0.1 مجم / لتر( في ماركة شاي ليبتون، وأعلى تركيز ) 2.5 مجم / لتر( في العلامة التجارية شاي الكبشين.
أبوبكر عامر بشير الطروق(10-2021)

This study was conducted to estimate the concentration of potassium bromate (KBrO3) in 21 samples of pastries and biscuits, and the absorption of samples was measured using a (Uv-Vis spectrophotometer). The results of this research showed that the amount of potassium bromate in the samples varies according to the sample, and the highest concentration was for the sample of Major Biscuits(567.5ppm). The lowest concentration was for 44 ppm mleeha cake sample. We conclude the use of an internationally banned carcinogen and prohibited by Libyan laws, as this study revealed the presence of high concentrations of it in the tested samples.
ABUBAKER A BASHIR ATRROG(12-2021)

The present study was conducted to figure out the effect of some mineral and biofertilizers on nutritional value of Acacia saligna seedlings. This study was carried for 14 months at the nursery of Forestry and Wood Technology Department, Faculty of Agriculture, Alexandria University-Egypt. Three commercial mineral fertilizers were used in this study: Urea, Calcium superphosphate, and Potassium sulphate as a source of nitrogen, phosphorus, and potassium (NPK). In this study, six levels of mineral fertilization treatments were used [F0-F5]. The results of this study showed that Acacia saligna seedlings treated with F2& F3 fertilizers recorded the highest value of crude protein, whereas, treatment with F2 fertilizer showed the highest value of crude fat. In addition to that, the lowest content of crude fat was found in the seedlings of Acacia saligna treated with F5 (halexbiofertilizer). Seedlings treated with F4 fertilizer showed no significant difference in content of crude protein from that treated with F5fertilizer. i.e., the crude protein and crude fat were found to respond to mineral fertilizers, whereas, crude fiber and total ash are not effected by adding fertilizers.
Abduraof Mustafa Omar Alosif(4-2021)

3D Holoscopic imaging (also referred to as Integral Imaging) is a technique for creating full colour 3D optical models that exist in space independently of the viewer. In this paper, the main objective is to provide new file formats as raw material for full parallax computer generated 3D Holoscopic content, based mainly on Adapted Multiprocessor Ray Tracing System, displayed on auto-stereoscopic. The most important is being 3D model file format as there are many 3D modelling application available in the market and support different file formats. Therefore a file formats (scene description file) are developed for an Adapted Multiprocessor Ray Tracing System "Tachyon" (AMRTST) and for Ac3D computer graphics software package as well; the new file formats are created by uses 3D unidirectional camera parameters. Experimental results show validation of the new algorithm (AMRTST) and for the first time a 3D content of file formats are developed, and tests on an adapted Multiprocessor ray tracing system and on Ac3D package some scenes are tested such as teapot, car, roses and human-body.
Dr. Mahmoud Geat Eljadid, Prof. Amar Aggoun, Dr. Osama Hassan Youssef(3-2018)

3D Holoscopic imaging (also known as Integral imaging) is a technique that is capable of creating and encoding a true volume spatial optical model of the object scene in the form of a planar intensity distribution by using unique optical component This paper presents an new technique that can produce 3D integral imaging animations movies, using the integral ray tracing algorithm. The main purpose of this paper is to propose a plug-in tool to interface with commercially available Ac3D Computer Graphics software package. The proposed approach is based on a 3D integral imaging ray-tracer software, multiprocessor ray tracing system, and a 3D unidirectional integral camera model. Basically, 3D camera file is required to manipulate 3D camera viewing parameters in order to have a new position of the 3D integral imaging camera. Ac3D IIP is especially developed in order to read the Ac3D model file format. Experimental results show validation of the new adapted software tool and tests on such as car and roses models. Consequently, 3D holoscopic computer animation has been created. Although a basic 3D model was used, this still showcases the principles behind 3D holoscopic imaging and it has been successfully displayed on a HoloVizio display.
Dr. Mahmoud Geat Eljadid, Prof. Amar Aggoun(3-2018)