Mitigating Resonant Vibration via Compressor Base Frame redesign at Souq Al-Khamis Cement Factory, Libya (Part II)
Journal ArticleResonance occurs when the operating frequency of a system aligns with its natural frequency, resulting in amplified vibration amplitudes. To prevent potential damage and ensure optimal performance of a compressor's base frame at Souq Al-Khamis Cement Factory, researchers found the resonance in has been occurred when both the natural frequencies and rotating frequency were overlapped. Resonant Vibration in the base frames arises when the rotating vibration frequency aligns with the frame’s natural modes that leads to structural instability, fault unplanned shutdowns and production losses. This study analyzes resonant vibration in a cement factory compressor base frame and proposes a redesign using finite element methods to mitigate this issue. Four distinct modifications were made to the base frame on its shape, weight and boundary conditions: the first introduces fixed points to enhance rigidity, the second adds supports for increased stability, the third incorporates elements to improve durability, and the fourth enhances the thickness of the compressor. The results indicate that the redesigned configuration most effectively mitigates resonance and improves the system's natural frequency response.
Osama Amhammeed Altaher Hassin, Mostafa H Essuri Abobaker, (05-2025), Academy journal for Basic and Applied Sciences (AJBAS): الأكاديمية الليبية, 7 (1), 1-5
Comprehensive Analytical Study of Structural Reclamation in Aging Flexible Pavement
Journal ArticleThe progressive deterioration of flexible pavements, driven by increasing traffic loads, environmental influences, and material aging, necessitates the implementation of effective structural reclamation strategies to restore functional performance and extend service life. This study focuses on a critical segment of the Libyan coastal road network, specifically the 27.5 km part from Tripoli Street Bridge to Al-Krarim Gate. An analytical and quantitative investigation is undertaken to evaluate the structural condition and rehabilitation potential of the existing flexible pavement system, with particular attention to distress mechanisms, material degradation, and the effectiveness of various rehabilitation techniques. The assessment integrates field investigations, laboratory testing, based on AASHTO 1993, and to evaluate pavement distress, base soil strength, and asphalt concrete layers performance; Pavement Condition Index (PCI) values and core sample analyses are employed to determine the extent of structural failure. Visual distress surveys supplement the data to provide a comprehensive understanding of surface and sub-surface conditions. Analytical modeling, based on layered elastic theory is used to simulate pavement response under rehabilitated conditions and forecast long-term performance under loading. The study examines several rehabilitation methods, including full-depth reclamation (FDR), cold in-place recycling (CIR), and mechanical stabilization using cementitious additives. Each method is evaluated based on structural capacity enhancement, cost-efficiency, and service life extension. Results demonstrate that the selection of reclamation techniques tailored to subgrade conditions and traffic loads significantly improves structural performance and minimizes maintenance needs. The study concludes that full-depth repaving offers the most sustainable and economically viable solution for restoring the targeted roadway section.
Mohamed Ali Milad karm Salem, Abdalla Ali Agwila, Abdelbaset M. Traplsi, (05-2025), Journal of Alasmarya University: Applied Sciences: Journal of Alasmarya University: Applied Sciences, 2 (10), 118-134
Analytic Modeling to Study the Insolation Heat Gain of Semi Insulated Building in Hot Climate
Journal ArticleCountries located in temperate, hot and arid climates, such as Libya, face the critical need to cool houses whose internal temperatures rise due to these climatic conditions. This can be achieved by employing proper insulation techniques to prevent heat gain from solar radiation (insolation). This paper addresses the impact of not implementing thermal insulation for the roof of a building, in contrast to other external parts of the structure. The temperature distribution in a single-story building was studied using finite element analysis (FEA), along with how the building absorbs heat from its surroundings during a sunny day. The thermal analysis was conducted on a 3D concrete building with walls made of concrete masonry blocks, a floor height of 3.20 meters, and a total area of 40 square meters, using ANSYS 2020 R2 software. The building model includes thermal insulation for the external envelope, but the roof and openings remain uninsulated (as is often the case with home insulation practices in Libya). The finite element method is widely used due to its high effectiveness in simulation and achieving accurate results. The analysis results demonstrated the heat distribution gained from insolation, as well as variations in the rates of heat transfer from the building's exterior to its interior. The findings showed that neglecting the thermal insulation of the roof and window openings leads to an approximate 70% increase in the building's internal temperature. Furthermore, the results clearly indicated that insulating the building's walls alone is insufficient to prevent overheating. This provides a sufficient understanding of the prioritization required in applying insulation layers for buildings located in hot climates.
Mohamed Ali Milad karm Salem, (05-2025), Academy journal for Basic and Applied Sciences (AJBAS): Academy journal for Basic and Applied Sciences (AJBAS), 1 (7), 1-5
Evaluation of Diabetic Cardiac Autonomic Neuropathy in Libyan Patients: Cross‐Link with Biochemical and Clinical Risk Factors
Journal ArticleDiabetic cardiac autonomic neuropathy (DCAN) is a significant condition that affects cardiovascular health worldwide and is associated with increased morbidity and mortality rates. Therefore, early detection and management of DCAN are crucial for reducing the risk of cardiovascular disease among individuals with T2DM. Identifying this disorder can enhance patient outcomes and quality of life by minimizing the chances of serious complications. This cross-sectional study aims to identify diabetic individuals with DCAN and to investigate its relationship with various risk factors, including hyperglycemia, the duration of diabetes, the presence of peripheral somatic neuropathy, and diabetic microvascular complications. The study included 261 patients with T2DM, comprising 61.5% females and 38.5% males. Participants underwent cardiovascular testing and clinical evaluations to identify cases of cardiac autonomic neuropathy. Out of the 261 randomly selected patients, 82 were diagnosed with DCAN, resulting in a prevalence rate of 31.4%. The average age for female patients was 57.5 ± 0.7 years, while for male patients, it was 56.3 ± 1.2 years from the total recruited patients. In addition, there is a strong association between DCAN and clinical and biochemical parameters such as lipid profile, duration of diabetes, poor diabetic control, and presence of microalbuminuria in patients with DCAN and above 60 years old, compared to younger patients. The study highlighted a strong association between DCAN and factors such as poor glycemic control, prolonged diabetes duration, and the presence of chronic microvascular complications, including neuropathy, retinopathy, and nephropathy. These findings emphasize the importance of raising awareness and proactively assessing Libyan patients who are at risk for cardiovascular autonomic neuropathy. This is crucial to reduce the likelihood of recurrent acute cardiac complications, especially in patients undergoing emergency surgery without a prior diagnosis. It is vital to recognize this risk.
Keywords. Type 2 Diabetes Mellitus, Pulse Rate, Metabolic Syndrome, Blood Pressure.
Bahaedin Mustafa Ramadan Ben Mahmud, Najwa Al Tashani, (04-2025), طرابلس: Alqalam Journal of Medical and Applied Sciences., 8 (2), 555-561
أهمية تدريس مقرر الذكاء الاصطناعي بأقسام علوم المعلومات والمكتبات والارشيف ... دراسة استطلاعية من وجهة نظر أعضاء هيئة التدريس في الجامعات الليبية
مقال في مجلة علميةلا يخفى على أحد ما شهدته وتشهده مرافق ومؤسسات المعلومات خلال السنوات الماضية من تطورات وتحولات متلاحقة، حيث تأثر المحتوى والمكان والإنسان والخدمات والأدوات في مؤسسات المعلومات بالتقنيات الذكية، وظهرت مفاهيم جديدة مثل المكتبة الذكية ومكتبة المستقبل والمكتبة في المدينة الذكية ...الخ، وان ظهـــور المسميات تلك أحدث اختـلال في التــوازن بين نوعية الوظائــف التي يفترض وجودها بمؤسســات المعلومات كســـوق للعمــل، وبين أدوار البرامج الأكاديمية، بمعنى اكثر وضوحا من حيـث العــرض والطلــب في نوعية وحجــــم مخرجات تلك البرامج الاكاديمية.
إزاءً ذلك برزت حجـم التحـدي والرهــان حيث تشكل عبءٍ إضافيٍ للقائمين على البرامج الأكاديمية المتخصصة في تعليم علوم المعلومات والمكتبات، الذي فرض على المؤسسات الأكاديمية بمختلف مستوياتها (المراحل الجامعية الأولى والدراسات العليا)، ضرورة إعادة النظر في برامجها وخططها وأهدافها، لتتلاءم مع التطورات المعاصرة سواء فيما يتعلـق بالمقررات ومفردتها أو بالكفاءات والمهارات والقدرات التي ينبغـي على أعضاء الهيئات التدريسية إكسابها للدارسين وتغذية سوق العمل بها لاحقا.
لذا تستهدف الدراسة بشكل أساسي: معرفة وجهة نظر أعضاء هيئة التدريس بأقسام تعليم علوم المعلومات والمكتبات بالجامعات الليبية في أهمية تدريس تطبيقات الذكاء الاصطناعي في مجال خدمات المعلومات، وهل يوجد موضوع الذكاء الاصطناعي ضمن محتوى مفردات المقررات الحالية في البرامج المعتمدة، ومدى إمكانية تدريس مقرر مستقل بمسمى تطبيقات الذكاء الاصطناعي، والى أي مدى توجد تحديات في ذلك وماهي المخاطر المحتملة لعدم تدريس هذا المقرر؟
حنان الصادق محمد بيزان، (04-2025)، القاهرة: المجلة العربية الدولية لدراسات المكتبات والمعلومات، 2 (4)، 13-44
الدراسات المستقبلية في البحث العلمي ودورها في تحقيق التنمية المستدامة: واقع وافاق
مقال في مجلة علميةسعت هذه الورقة البحثية التعرف على الدور الذي تشكله الدراسات المستقبلية في رسم السياسات العامة للبلدان المتقدمة والمتطورة، والتي أنشأت الآلاف من المراكز البحثية من أجل استشراف المستقبل لتنمية ورفاهية شعوبها، وعملت على انجاز العديد من الدراسات المستقبلية لها في شتى مجالات العلم والمعرفة واستفادة من نتائج هذه الدراسات والأبحاث على أرض الواقع، والتي تسهم بدورها في التخطيط والتطوير لبناء رؤية واضحة نحو مستقبل أكثر استقراراً واستدامةً في مختلف جوانب الحياة من خلال رسم الاستراتيجيات المبنية على العلم والمعرفة، لتصبح بذلك المحرك والموجه الأساسي لها، على اعتبار أن التنمية الناجحة تتطلب تخطيطاً مستقبلياً وتعاوناً بين الأفراد والمجتمعات لتحقيق نتائج مستدامة.
الكلمات المفتاحية: الدراسات المستقبلية، البحث العلمي، التنمية المستدامة.
علي محمد علي الرياني، (04-2025)، مجلة افاق المعرفة: الجمعية الليبية لدروب المعرفة، 8 (2)، 513-527
تحديات العدالة الانتقالية في ليبيا: التوازن بين المساءلة والمصالحة في مرحلة ما بعد النزاع قراءة تحليلية
مقال في مجلة علميةهدفت الورقة البحثية الراهنة التعرف على التحديات التي تواجه العدالة الانتقالية في المجتمع الليبي حيث يشكل موضوع العدالة الانتقالية والمصالحة الوطنية تحدياً كبيراً، ويعتبر من الموضوعات الجديرة بالدراسة، خاصة في هذه المرحلة التاريخية الحساسة التي تستدعي المزيد من بذل الجهود لاجل بناء دولة القانون والدستور وتحقيق "العدالة الانتقالية ومن تم المصالحة الوطنية" وذلك للخروج من الأوضاع الراهنة التي أدت إلى نشوء نزاعات وحروب وصراعات داخلية تغذيها أطراف خارجية، مما نتج عن ذلك حدوث انقسام سياسي ومؤسسي ترتب عنه تدهور في مستوى الخدمات المقدمة للمواطنين. ومن هذا المنطلق فإن هذه الورقة البحثية ينصب اهتمامها في البحث والدراسة حول مفهوم ومضمون العدالة الانتقالية والمصالحة الوطنية في إطار التوازن بين المساءلة والمصالحة باعتبارهما وسيلة مهمة لمعالجة الأوضاع الراهنة بشكل يتيح إمكانية الخروج من الأزمة الحالية. مع محاولة بحث وتفكيك حالة إشكالية حسم الأولويات بين العدالة والمصالحة، وكيفية الوصول إلى رؤية تنجلى فيها هذه الضبابية المعيقة للسلام والاستقرار والبناء بصورة تسهم في تجاوز المحنة الراهنة.
علي محمد علي الرياني، (04-2025)، جامعة بني وليد للعلوم الإنسانية والتطبيقية: جامعة بني وليد، 2 (10)، 292-302
اهتمامات بريطانيا بإقليم برقة في ضوء وثائق العلاقات الخارجية للولايات المتحدة الامريكية 1942-1949 دراسة تاريخيةزادت أهمية برقة بالنسبة لب
مقال في مؤتمر علميزادت أهمية برقة بالنسبة لبريطانيا خلال الحرب العالمية الثانية، عندما خافت بريطانيا من فقدان ممتلكاتها في مصر بصفة خاصة والبحر الأبيض المتوسط بصفة عامة.
الهمالي مفتاح الهمالي بن شكر، (04-2025)، كلية الادب -قسم التاريخ -جامعة طبرق: جامعة طبرق، 1-22
Prevalence of Polycystic Ovarian Syndrome in Alkhoms City, Libya: A Cross-sectional study
Journal ArticleAbstract
Polycystic Ovarian Syndrome (PCOS) is one of the most common endocrine disorders affecting women of reproductive age. This study investigates the prevalence of PCOS, focusing on patient-related and disease-related factors. A cross-sectional survey was conducted to explore obstetricians' and gynecologists' perspectives on the diagnosis, prevalence, and management of PCOS. A total of 35 specialists, each with at least three years of clinical experience, participated. The survey included open-ended questions covering patient-related factors (e.g., symptoms, lifestyle) and disease-related aspects (e.g., prevalence, diagnostic methods, treatment). Data were collected through face-to-face interviews from January to April 2022, ensuring confidentiality and standardized procedures to minimize bias. This study analyzed PCOS's prevalence, etiology, symptoms, diagnosis, and treatment. The highest prevalence (62.9%) was observed in the 20–29 age group, declining with age. Unknown causes accounted for 51.42% of cases, followed by hormonal and genetic factors (41.42% each). Menstrual irregularity (80%) was the most common symptom. Ultrasound was the primary diagnostic tool (82.85%), while metformin was the most prescribed treatment (71.42%). PCOS was the most prevalent condition among gynecological disorders (57.14%). These findings highlight the significant burden of PCOS and the need for improved management strategies. Our study concluded that the PCOS remains a significant health concern both globally and within Libya. Highlights the necessity for heightened awareness, early screening, and tailored management strategies. Further research is warranted to explore the underlying causes of regional prevalence variations and to develop culturally appropriate interventions that address the unique needs of the Libyan female population.
Keywords: PCOS, Hyperandrogenism, Endocrine Disorders, Infertility.
Alhmmali Abdalla, (03-2025), AlQalam Journal of Medical and Applied Sciences: Alq J Med App Sci., 8 (1), 408-414
A study to Improve the Rigidity of Beam-to-Column Connections in Reinforced Concrete Frames for Residential Buildings
Journal ArticleAbstract:
The construction of residential buildings in the state of Libya has become increasingly expensive, necessitating cost-effective design solutions. Structural engineers play a critical role in reducing construction costs while ensuring safety and efficiency. One approach to achieving an optimal design is minimizing the dimensions of structural elements ,a critical factor influencing structural performance and economy is the rigidity of beam-to-column connections, which significantly affects deformations and then internal forces. According to beam bending theory, bending moments and shear forces are directly proportional to deformation. Therefore, reducing primary curvature leads to a decrease in design moments, allowing for more economical structural sections. This study investigates the impact of considering partial rigidity in beam-to-column connections within reinforced concrete (RC) frame, particularly for single-story buildings. In conventional structural design, connections are often assumed to be either fully rigid or fully pinned, neglecting partial rigidity effects. This oversimplified modeling approach results in overdesign and increased material consumption, deviating from sustainability principles. The research use SAP2000 structural analysis software to assess various degrees of connection rigidity and their influence on member deformation. The findings indicate that incorporating realistic connection rigidity can reduce beam deformation by up to 20% (at 0.7 rigidity) , leading to smaller and more cost-effective frame sections. Furthermore, common construction methods in the state of Libya inherently provide a certain degree of rigidity at beam-to-column interfaces, yet current design practices often overlook this advantage. This study underscores the importance of optimizing beam-to-column connection rigidety to enhance structural performance, reduce material usage, and align with sustainable design principles. The findings contribute to improving cost efficiency in RC frame construction, providing valuable insights for engineers seeking to optimize structural design in residential buildings
Keywords:Beam-to-Column,Connection, Sustainability, Optimum Design , Rigidety
Mohamed Ali Milad karm Salem, (03-2025), International Science and Technology Journal: International Science and Technology Journal, 36 (1), 1-13