Université Mouloud Mammeri de Tizi Ouzou (UMMTO): Research Review of Sciences and Technologies
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Damage detection for a large-scale truss bridge using Tranmissibility and ANNAOA
Get PDFIn this paper, we propose an efficient approach to enhance the capacity of Artificial Neural Network (ANN) to deal with Structural Health Monitoring (SHM) problems. Over the last decades, ANN has been extensively utilized for damage detection in structures. In order to identify damages, ANN frequently utilizes input information that is based on dynamic features such as mode shapes or natural frequencies. However, this type of data may not be able to detect minor damages if the structural defects are insignificant. To transcend these limitations, in this work, we propose utilizing transmissibility to create input data for the input layer of ANN. Moreover, to deal with local minimum problems of ANN, a combination between the Arithmetic Optimization Algorithm (AOA) and ANN is proposed. The global search capacity of AOA is employed to remedy the local minima of ANN. To evaluate the effectiveness of the proposed approach, a numerical model with different damage scenarios is considered. The suggested approach detects damage location precisely and with higher severity detection precision than the conventional ANN method
التحليل السيميائي للحكاية الشعبية محذوق وعلي أنموذجا
Get PDFThis research deals with a semiotic analysis of the popular tale Mhdouk and Ali in order to extract functions ,paths and narrative programs.Mahdouk and Ali’s tale is different from the rest of the text with a linear path. It begins with a lack and ends with its elimination. This story has many narrative programs and different global structures .It is a complex tale that includes a set of partial tales separated from each other .each tale can be analyzed separately but it cannot de separated definitively.It is the structures that make up the story of Mahdouk and Ali
الموت وفلسفة الانبعاث في شعر خليل حاوي
No full textLife after death or the idea of rebirth, occupying intellectuals, philosophers and poets, their message to their audience, is a message of hope. fertile soil against drought, and hope against despair, life instead of death, and Victory in place of refraction. a philosophy that tries to overcome the power of death by holding on to life, and giving it the meaning of renewal and rebirth, such as phoenix, and ishtar.This was the experience of Khalil Hawi the poet who distinguished himself from others in this context, because he carried a collective concern about his nation to rise up and regain its status and leadership
Ali Ibn Ghadhahem's Revolt (1864) and Its Global Context: The Tunisian Regency and the American Civil War
Get PDFطرحنا في هذا المقال إشكاليّة أساسيّة للبحث: هل أثّرت السياقات العالميّة في اندلاع ثورة علي بن غذاهم، خاصة الحرب الأهليّة الأمريكيّة وانقطاع مادّة القطن؟ اعتمدنا على مدوّنة مصدرية أساسيّة وهي وثائق السلسة التاريخية المحفوظة بالأرشيف الوطني التونسي وأعداد الرائد التونسي والمراسلات القنصليّة. تبيّن لنا في هذا العمل الدور المهمّ الذي لعبته مادّة القطن في اندلاع ثورة 1864. ساهمت الحرب الأهلية الأمريكية في توقّف وصول سبعة أثمان القطن إلى القارة الأوروبية وخاصة لانجلترا. سعت انجلترا إلى البحث عن منابت للقطن في آسيا وافريقيا حيث مثّلت البلاد التونسية وجهة أساسيّة لقربها من أوروبا واعتدال مناخها إلى جانب توافر البنية القانونية المناسبة لتملّك الأوروبيين للأراضي خاصة بعد الاعلان عن دستور 1861. هدّدت المشاريع الانجليزية المصالح الفرنسية لا في الإيالة التونسية فقط بل في شمال افريقيا عموما. واندلعت ثورة 1864 ضمن هذه السياقات العالمية. وليس من الصدفة إقدام الباي على تعليق العمل بالدستور بعد اندلاع الثورة. In this article, we raised a basic research problem: How did the American Civil War (1861-1865), and the disruption of cotton, contribute to the outbreak of the 1864 Revolution?We relied on a basic source code, which is the documents of the historical series preserved in the Tunisian National Archives, the numbers of the Tunisian Major, and the consular correspondence.In this work, we explained the important role that cotton played in the outbreak of the 1864 revolution. The American Civil War contributed to stopping seven-eighths of cotton from reaching the European continent, especially to England. England sought to search for cotton fields in Asia and Africa, where Tunisia represented a main destination because of its proximity to Europe and its moderate climate, in addition to the availability of the appropriate legal structure for Europeans’ ownership of the lands, especially after the proclamation of the 1861 Constitution. English projects threatened French interests not only in the Tunisian province, but also in the North Africa in general. In addition, the revolution of 1864 broke out within these global contexts. It is no coincidence that the Bey suspended the constitution after the outbreak of the revolution
Sustainable Development of High-Volume Fly Ash Self-Compacting Concrete Incorporating Bottom Ash and Recycled Concrete Aggregates
Get PDFIncorporating by-products like coal bottom ash (BA), recycled concrete aggregates (RCA), and fly ash (FYA) in concrete is an essential step toward green and sustainable development in construction sector. For sustainable utilization of RCA as natural coarse aggregates (NCA) and BA as natural fine aggregates (NFA) in high-volume fly ash self-compacting concrete (HVFYA-SCC), this study investigates ten numbers of designed HVFYA-SCC mixes. HVFYA-SCC mixes were developed with varying content of ordinary Portland cement, FYA (60%), NCA, NFA, RCA (maximum 50%) and BA (maximum 30%). The substitution of 20% BA and 25% RCA in HVFYA-SCC mixes increased compressive and split tensile strengths after 120 days of curing, while further substitution (s) led to a drop in properties. Similarly, at 120 days of curing the maximum electrical resistivity was achieved (20% BA and 25% RCA), while all mixes under ultrasonic pulse velocity resulted in the ‘good category.’ Also, the same mix resulted in lower sorptivity values for maximum curing. A good correlation (R2 0.8) was observed among the tested mechanical and durability properties. The outcomes of this study indicate valuable information on the performance and potential benefits of using HVFYA-SCC in advanced structural designs for upcoming concrete industry. Furthermore, the findings successfully support the implementation of designed concretes as sustainable and environmentally-friendly alternative to conventional concrete(s)
A review of research on fiber reinforced concrete
Get PDFConcrete is the most widely used construction material in the world. Nowadays the world is witnessing the construction of more and more challenging Industrial structures. So, the concrete needs to possess very high-strength, high performance, and sufficient workability. Researchers all over the world are developing high-performance concrete by adding various types of fibers in different proportions. Various fibers like steel, glass, carbon, polypropylene, and natural fibers provide improvement in mechanical properties of concrete such as compressive strength, flexural strength, tensile strength, bond strength, fatigue characteristic, durability, shrinkage, impact, erosion resistance, and serviceability of concrete. Because of such characteristics, fiber-reinforced concrete has found many applications in the civil engineering field. An attempt has been made to review the available literature on fiber-reinforced concrete. This review aims to study the present research work on fiber-reinforced concrete and the scope of different fibers in future research work. From the review, the conclusion can be drawn that vast research work has been carried out on the mechanical properties of steel fiber reinforced concrete (SFRC). However, the elastic properties of SFRC are not fully explored in this literature. Also, there is a scope for researchers to study the properties of carbon fiber, polypropylene fiber, cotton fiber, basalt fiber, jute fiber, Nano human hair fiber, and hybrid fiber in concrete. Research on the use of waste material as fiber in concrete has wide scope in the future as using waste material will reduce its impact on the environment and will reduce pollution
خصوصية الاستعارة في البحث البلاغي والنقدي القديم
Get PDFThrough our research we tried to elucidate the opinions of critics and the specificity of the concept of metaphor among the heritage rhetoricians, as it is central in their analysis of heritage discourses, especially religious and poeticWe reviewed the historical aspect of metaphor through the concepts of transgression and displacement, focusing on the opinions of” Al-jahidh” “,Al- Azhari” “,Ibn –Al-Theer” “,Ibn outayba” and “Ibn Rachiq”…Then we examined the two aspects of perfection and obligatory in poetic writing and we concluded that the dynamism of this concept is difficult to control in one conceptual structure, due to the different references of these critics and rhetoricians
الشعر القبائلي في المهجر
Get PDFThe article aims to address the issue of migration, which Algerians suffered, and they produced a beautiful poetry; homesickness is undoubtedly one of the most present themes in the Kabyle poetry produced by poets of exile particularly in France, with deep and sparkle words, like in Cheikh El-Hasnaoui, Slimane Azem, and Allaoua Zerrouki's and many others warbled songs. Their poems stem from souls denied the most basic right, that is to live among parents and friends. It is of no surprise, since they were written by poets who left them home carrying above their shoulders a humongous weight of hope and ambition, living their naïve and modest life to collide with materialism and annoying routine life that they weren’t accustomed to. They subsequently felt a huge gap in their hearts which made them remember their calm and peaceful village, longing and nostalgic about their childhood remembrances, where they had a nonchalant happy life despite poverty and colonialism, to end up in their exile deprived of the pleasures of happiness and tranquillity.In this study, we will try to address the most important factors leading to migration and alienation, citing a separate group of these expatriates’ poetry
A reading on the issue of naturalization in Tunisia during the French protectorate 1909-1933
Get PDFعهدت السلطات الفرنسيّة إلى انتهاج سياسة تجنيس التونسيين وتمتعيهم بامتيازات هامّة في فترة الحماية الفرنسيّة على تونس خاصة في الربع الأول من القرن العشرين .هذا المشروع الذي بدأ سنة 1910 ليتواصل لعشرات السّنين أثار غضب الوطنيين التونسيين لما سببه من تداعيات سلبيّة على مستويات متعدّدة، وقد تجنّدت مختلف الأطياف والأقلام الصحفيّة للدفاع عن القوميّة التونسية وعدم المساس بها.The French authorities entrusted them with the pursuit of a policy of naturalization of Tunisians and the enjoyment of important privileges during the period of the French protectorate over Tunisia, particularly in the first quarter of the 20th century. This project, which began in 1910 to continue for decades, angered Tunisian patriots because of the negative repercussions it caused on multiple levels Spectra and journalistic feathers to defend Tunisian nationalism, not harm it
Appropriate sample size and effects of microscopic parameters on the shear strength and strain localisation of 2D cohesive-frictional granular assemblies
Get PDFGranular materials are made up of smaller particles, manifestation of microstructure results in a macroscopic response of granular material. Understanding the overall mechanical behaviour from microscopic parameters is one of the main challenges in many engineering fields including civil engineering. When modelling this kind of material by Discrete Element Model (DEM) using idealized circular grains, the effects of appropriate sample size and microscopic parameter changes have been a crucial subject. Previous research has primarily relied on the case of purely frictional granular materials. In this paper, we use DEM to investigate the appropriate sample size and the relationship between microscopic parameters and the macroscopic responses of cohesive-frictional granular assemblies by performing a series of biaxial tests. Our findings indicate that a minimum number of particles is required to balance between mechanical behaviour and computing time. In addition, through extensive parametric studies, the paper explores the impact of factors such as interparticle bonds, intergranular friction coefficients, and initial void index on the overall shear behaviour of granular assemblies. Also, the result reveals a strong correlation between shear band formation and the break field of cohesive contact (static variable) and the translations and rotations of grains (kinematic variable)