{"title":"التحليل الهيدرومورفومتري لحوض وادي الباب, جنوب غرب الجبل الاخضر- ليبيا, بالتكامل بين نموذج الهيئة الامريكية لحماية الاراضي (SCS) وتقنيات نظم معلومات الجغرافية.","authors":"لبنى سليمان بن طاهر","doi":"10.59743/jau.v9i3.2056","DOIUrl":"https://doi.org/10.59743/jau.v9i3.2056","url":null,"abstract":"هدفت هذه الدراسة إلى حساب الخصائص المورفومترية والهيدرولوجية لحوض وادي الباب الواقع جنوب غرب الجبل الأخضر, بتوظيف تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية ونموذج الهيئة الامريكية لحماية الأراضي(SCS)؛ حيث خلصت الدراسة إلى أن حوض وادي الباب بمساحة بلغتkm21061.06, وطول مجراه الرئيسيkm89.0, وعرضه Km 27.18, مما يدل على زيادة معدل التبخر به وعدم احتفاظه بالمياه الجارية على سطحه وتجميعه لكمية كبيرة من مياه الأمطار, وخصائصه الشكلية دلت على أن الحوض يقترب من الشكل المثلث وهو ببداية دورته الحتية, أما خصائصه التضاريسية دلت على سيادة التعرية المائية به، مع زيادة نقل الرواسب من المنابع العليا للحوض إلى المصب كمروحة فيضية, ونسيج الحوض ناعم ومتكون من تربة ضعيفة غير منفذة؛ زمن التركيز بحوض وادي البابhr25.4 مما يدل على الحجم الكبير بالجريان السطحي المجمع, بأقصى تدفق m3/sec5.67, بما يقابل أقصى حجم للجريان سطحي مليار m30.44, بعد هطول للأمطار بشدة mm608.33؛ بنهاية الدراسة يتم التوصية بإنشاء سدود تعويقيه بمجرى الأودية تطبيقا لمبدأ حصاد مياه الأمطار بحوض وادي الباب, وعدم التهاون في تطبيق التشريعات التي تحد من عمليات تجريف التربة والغطاء النباتي الطبيعي بالحوض, والاهتمام بإنشاء محطات رصد للتدفق والجريان السطحي ومناخي بحوض وادي الباب والأحواض والأودية الطبيعية بدولة ليبيا, واستخدام تقنيات الاستشعار عن بعد ونظم المعلومات الجغرافية لإنشاء قاعدة بيانات مورفومترية ومناخية وهيدرولوجية لأحواض التصريف بدولة ليبيا يمكن الاستفادة منها في الدراسات المستقبلة.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"137 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141810901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An Efficient Finite Element for Vibration Analysis of Symmetric Sandwich Beams Subjected to Harmonic Bending Excitations","authors":"Hasan M. Nagiar, Mohammed A. Hjaji","doi":"10.59743/jau.v9i3.2050","DOIUrl":"https://doi.org/10.59743/jau.v9i3.2050","url":null,"abstract":"An efficient sandwich beam finite element is developed for the coupled axial bending vibration analysis of sandwich beams subjected to general harmonic bending excitations. A Hamilton’s variational formulation is used to derive the governing field equations, which are exactly resolved to establish the exact solution for dynamic response in steady state form. A set of shape functions is created using the exact solution of the governing equations. These functions are employed to construct a finite element for beams. This finite element features two nodes, each with six degrees of freedom, effectively representing the coupling between the extensional and flexural behaviours of symmetric sandwich beams subjected to harmonic bending loads in static and steady-state dynamic responses. To establish the exactness and effectiveness of the current sandwich beam element, it is compared with established Abaqus finite element solution and other solutions reported in the litrature. The newly developed sandwich beam element demonstrates freedom from discretization errors observed in alternative interpolation methods. It produces results that closely match those obtained from other finite element solutions, but at a significantly reduced computational and modelling cost","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"76 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141658199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"أحكام الدين المتعلقة بالزكاة عند المالكية","authors":"الهادي محمد الهادي الطويل","doi":"10.59743/jau.v37i2.2042","DOIUrl":"https://doi.org/10.59743/jau.v37i2.2042","url":null,"abstract":"تناولت هذه الدّراسة موضوع زكاة الدّيون عند المالكية وما يتعلق بها من أحكام، مع بيان ماهيتها وحكمها، وتحرير أقوال فقهاء المذهب واختلافهم في ذلك، وإظهار أقسام الديون وحكم كل نوعٍ في الزكاة، وأثر ذلك على الدّائن والمدين على حدٍّ سواء، مع إيضاح جنس الديون المسقطة للزكاة، وشروط الدين المانع منها، من خلال دراسة الموضوع دراسة مذهبية، وتوصلت الدراسة لعدد من النتائج أبرزها: أنّ ديون الشخص ليست مسقطة للزكاة على الإطلاق، وأنّ حكم زكاتها يختلف باختلاف أصل الدين ومنشئه، واختلاف نوعه.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"119 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141124201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"تطبيقات القواعد الأصولية عند المالكية من خلال حديث: (ولوغ الكلب في الإناء)","authors":"عبد الحكيم سالم امحمد الكامل","doi":"10.59743/jau.v37i2.2044","DOIUrl":"https://doi.org/10.59743/jau.v37i2.2044","url":null,"abstract":"استقر عند الأصوليين أن تطبيقات القواعد الأصولية هي مختبر نجاعتها وبرهان صلاحيتها في العملية الفقهية، استنباطا واستدلالا وتوجيها، وقد أجاب البحث عن هذه الفرضية من خلال تحليل حديث نبويّ (ولوغ الكلب في الإناء) من حيث الدرس الأصولي عند المالكية، حيث تجلت جودة الربط بين الدرس النظري في كتب الأصول والتطبيقي في كتب الفروع، وفق آلية سمحت باطراد المشهور مع الاختيار الأصولي في المذهب، لتؤكد أن الاختلاف الفقهي داخل المذهب ليس مجردا عن نظر أصولي؛ بل إنه مستند إلى قواعد كلية مطردة، زاد من إثرائها كونها متنوعة تشمل قواعد التعليل، والمفاهيم، ودلالة الأمر، والعام والتخصيص، والتعارض والترجيح، مما يستدعي تعميق البحث في المجال الفقهي في الإطار الأصولي لاسترجاع رونق الفقه وريادته.\u0000 ","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"10 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140988085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigating the impact of the diameter of the solar collector on the output power of the solar chimney system","authors":"Rabia Al. Galia, Mohsen Faroun Ahmed","doi":"10.59743/jau.v9i1.2024","DOIUrl":"https://doi.org/10.59743/jau.v9i1.2024","url":null,"abstract":"The aim of this of paper is to study the effects of the collector radius of a solar chimney power plant (SCPP) on the power output of a solar chimney system. The data was collected from a small prototype solar chimney which was conducted at the College of Engineering, Sabratha. Geometric measurements were taken from the first model used in Manzanares, Spain. In this research, the height of the chimney was fixed at 194.6 m, the geometric dimensions of the solar chimney station were fixed and, the value of the collector radius was varied for energy production .The power output value was calculated for each radius. MATLAB software was used as numerical solution tool to assess the thermal behavior and performance of a solar chimney power plant . The maximum value obtained for the output power was 192.19 kilowatts with a diameter of 544 meters whereas the lowest value was 55 kilowatts with a diameter of 244 meters. Both values were obtained at the same time at 3 p.m. which shows the effect of the collector radius on the amount power produced. Also, it was concluded that the theoretical power output of SCPP is directly proportional to the radius of the collector.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":" 28","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140385306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Grip strength on Work Efficiency in Hand Tools Tasks","authors":"A. Shokshk, Mostafa Ahmed Shokshok","doi":"10.59743/jau.v9i1.2002","DOIUrl":"https://doi.org/10.59743/jau.v9i1.2002","url":null,"abstract":"The overarching goal of ergonomics is to enhance performance and ensure workplace safety during physical tasks, simultaneously minimizing musculoskeletal disorders and energy expenditure. Recently, concerns have arisen about body measurements contributing not only to musculoskeletal issues but also to a potential decline in energy and work efficiency. Hence, this study aimed to explore the impact of maximum grip strength (MGS) on activity energy expenditure (AEE) and work efficiency. AEE measurements, conducted using the Actiheart, were carried out with 10 subjects performing a drilling task in 12 coordinated postures involving the shoulder, trunk, and leg. Analysis through independent samples t-test and mean differences revealed that AEE decreased as subject's MGS increased. Individuals with higher MGS exhibited lower in AEE, suggesting greater efficiency in their performance.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"42 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140440640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aref M Alkelani, Abdurezzag M Ataalah, Abduallah M. Shwairef
{"title":"Assessing The Relationship Between Total Quality Management (TQM) Practices and Organizational Performance in Libyan Manufacturing Companies","authors":"Aref M Alkelani, Abdurezzag M Ataalah, Abduallah M. Shwairef","doi":"10.59743/jau.v9i1.2005","DOIUrl":"https://doi.org/10.59743/jau.v9i1.2005","url":null,"abstract":"In the contemporary landscape, manufacturing companies should actively cultivate their competitiveness and demonstrate the capacity to sustain a robust competitive advantage. Key factors in this pursuit are Organizational Performance (OP) and the implementation of Total Quality Management (TQM), which are widely recognized as crucial variables within the manufacturing sector. This study employs a comprehensive approach, utilizing descriptive analysis with the Statistical Package for Social Sciences (SPSS) and Structural Equation Modeling (SEM) employing the Partial Least Square (PLS) Approach Version 3.0. Distinguished by its capability to represent unobserved concepts in relationships, account for measurement errors in the estimation process, and validate the hypothesized model, this approach adds rigor to the investigation. The primary focus of this research is the assessment of the relationship of TQM implementation across a spectrum of companies, encompassing those with formal TQM programs and those incorporating TQM practices. Meticulously designed questionnaires are utilized for data collection, and distributed among various personnel, including total quality managers, supervisors, quality assistants, control managers, general managers, top manager production managers, and individuals possessing relevant quality expertise. Through rigorous hypothesis testing, the study aims to establish the relationships between TQM and OP. The findings reveal a positive relationship between TQM and OP in the manufacturing companies in Libya. It is anticipated that the outcomes of this study will serve as valuable insights and guidance for compliance managers and practitioners in Libyan manufacturing, fostering improvements in organizational performance through effective TQM implementations","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"29 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140441937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Heuristic Based on LPT rule and a restricted B&B Method to Minimizing the Expected Makespan on a Single Machine","authors":"Elmabrok H. Abdelrahim, B. Vizvári","doi":"10.59743/jau.v9i1.1988","DOIUrl":"https://doi.org/10.59743/jau.v9i1.1988","url":null,"abstract":"Considering the production and maintenance schedule simultaneously has a great attention for more than two decades. At the beginning, most of these researches treated maintenance activities as a fixed hole in the study period. Later, in the majority of them, the maintenance periods starting time were fixed but their intervals may variate. In the non-preemptive case, only few of articles that deals with the maintenance activities starting time as a decision variable. In this article, the time to starting the planed maintenance activities (PM) is a decision variable and the expected repair time is estimated according to nonhomogeneous Poisson process (NHPP). The failure function is Weibully distributed and the repair due to failure is minimal while the PM repair is perfect. Two cases were considered for the model which is aiming to minimizing the expected makespan (EMS), first, the preemptive case which was solved optimally. Secondly, a heuristic based on longest processing time rule (LPT) and a restricted branch and bound method (B&B) are provided to solve the problem for the non-preemptive case. Each of the proposed procedures uses the optimal solution properties of the preemptive case. The optimal solution for the non-preemptive model can be reached using LPT in case of . Finally, the results showed the robustness for B&B which their lower bound obtained by the optimal solution of the preemptive case and the upper bound is the first solution obtained by LPT.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"8 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"الصيانة الإنتاجية الشاملة وأثرها على مستويات الأداء في شركة السرير للعمليات النفطية","authors":"فرج فرحات الضبيع, المعتصم بالله المبروك العكاري","doi":"10.59743/jau.v8i4.1953","DOIUrl":"https://doi.org/10.59743/jau.v8i4.1953","url":null,"abstract":"تلعب الصيانة الإنتاجية الشاملة، والتي تعد أحد أهم أدوات التصنيع الرشيق دوراً مهماً في زيادة مستويات أداء العمليات الصناعية. حيث يعد الغرض الرئيسي من هذه الورقة التحقق من مستويات الأداء الفعلية للشركة المستهدفة بهذه الدراسة، بهدف تحسين هذه المستويات، بالإضافة إلى الحد من كافة أنواع الفواقد في العمليات الصناعية. ولتحقيق ذلك، تم تصميم استبانة لجمع البيانات المطلوبة. وبناءً على تحليل هذه البيانات، أشارت النتائج وجود مستويات أداء فعلية مقبولة لكافة العوامل الرئيسية للصيانة الإنتاجية الشاملة، وكذلك لأغلب العوامل الفرعية المتعلقة بها، والتي من بينها اهتمام العاملين باتباع القوانين المتعلقة بالسلامة المهنية داخل البيئة الصناعية. ونتيجة لذلك، تقترح الدراسة زيادة الاهتمام بالتدريب مع تبني تطبيق وتوطين أحدث الطرق والمعدات ذات العلاقة ببرامج الصيانة الإنتاجية الشاملة للوصول إلى تحسين ملحوظ داخل هذه الشركة، وفي كامل قطاع النفط الليبي بصفة عامة.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"2010 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139002019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
باسم عباس حسن, صابرين حسين جاسم, زينب عبدالجبار قدو
{"title":"استخدام القاطـع الذهبي لحـل مسائل البرمجة الكسرية الخـطية","authors":"باسم عباس حسن, صابرين حسين جاسم, زينب عبدالجبار قدو","doi":"10.59743/jau.v8i4.1947","DOIUrl":"https://doi.org/10.59743/jau.v8i4.1947","url":null,"abstract":"نسبة الـدالتين الخطيتين اللتين تـشكلان البرمجة الكسرية الخـطية لـيست دالــة خطـية. في هذا المشروع، نقدم طريقة لحل مسائل الـبرمجة الكـسرية الخطية من خلال تحويل مشكلة البرمجة الكسرية الخطية إلى مشكلة البرمجة الخطية باستخدام القاطع الذهبي، يمكننا بعد ذلك استخدام الطريقة المبسطة لحل المشكلة جبريًا. استخدمنا مجموعة من الأمثلة العددية لتوضيح طريقتنا. وقد تمت الاشارة إلى أن هذه الطريقة توفر فـائدة حسابية أكثر مما تمكنا من تحقيقه من خلال تقليل عدد الجداول والمراحل.","PeriodicalId":486166,"journal":{"name":"مجلة الجامعة الأسمرية","volume":"105 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138979532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}