Université Mouloud Mammeri de Tizi Ouzou (UMMTO): Research Review of Sciences and Technologies
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ترجمة العناصر الإشارية الشخصية والخطابية في دليل المستخدم: دراسة تداولية لنماذج من دليل مالك سيارة فورد إكسبلورير وترجماتها إلى اللغة العربية
No full textThis paper deals with the translation of person deictic elements and discourse deictic elements in Ford vehicle Owner Manual into Arabic by examining the way by which they are employed in samples from the original text and how they are conveyed in the translated text according to a pragmatic analytical approach, in order to find out whether the translator succeeded in preserving the purposes of using those deictic elements or failed. The study concluded that there was a diversity of procedures used by the translator to convey those purposes and proved his success in most of his choices
A new technique of friction stirs for repairing corrosion of aluminum plates
Full text linkIn this paper, we introduce and investigate a new technique based on the working principles of friction stir technologies for repairing corrosion in aluminum plates. This method utilizes friction, where a pinless tool with high rotation speed effectively cleans the corroded area through friction, generating heat between the plate and the tool. After cleaning, filler material is added to the corrosion-affected zone. The rotating tool exerts frictional heat on the filler material and the workpiece, which created a thermal field to treat corrosion by fusion and mixing in the corrosion zone. The generated heat comes from frictional and plastic dissipations, in which the friction contributes to the fusion of the filling material with the base metal. Tensile tests were performed to evaluate the mechanical properties of the repaired, corroded, and normal specimens. The mechanical properties of specimens are discussed so that the results of the tensile test showed a significant decrease in the mechanical resistance of the corroded plate, while the results for the repaired plate showed a significant improvement in mechanical properties, indicating that the repaired plate can perform its function satisfactorily again. the tensile test demonstrated the effectiveness of the applied friction stir repair technique in restoring properties, thereby improving the service life of the structur
Determine cable dynamic parameters from vibration measurement results
Full text linkStructural health monitoring is a particularly important issue for cable-stayed bridges. The main components of a cable-stayed bridge include the main girder, tower, and stay cables. Stay cables act as a support for the girder, helping it have a large span length. Therefore, stay cables are essential parts of cable-stayed bridges and extrados bridges. Determining the parameters of the stay cable is necessary work. Among the parameters of cable-stayed cables, dynamic parameters such as frequency and damping ratio play an important role. This paper presents a method combining the Hilbert transform and Bandpass filter to determine the frequency, damping ratio and logarithmic decrement of the stay cables. The analysis results show the logarithmic decay changes over time during the vibration. Therefore, to estimate the details, it is necessary to divide the data segment before calculating the logarithmic decay. The results of calculating the vibration frequency using the Hilbert transform method are similar to those of calculating the vibration frequency using the FFT method. The calculation results from the proposed method are compared with those of the traditional method and are highly accurate
Optimizing Concrete Mixtures through Multi-Criteria Decision Making: A Focus on Splitting Tensile Strength in Partially Set Concrete
Full text linkThe specific objectives of this experimentation is to investigate the splitting tensile strength of concrete subjected to partial setting with varying proportions of fly ash (20% and 25%) and 1% synthetic polypropylene fibers. The examination encompasses the assessment of workability, density, and splitting tensile strength, with the validation of results compared to earlier studies conducted at different time intervals (0, 45, 75, 100, and 180 minutes). The implementation of the Analytical Hierarchy Process assists in prioritizing the optimal parameters for the concrete mix. The findings reveal a reduction in workability and density as the time delay increases; however, there is a notable enhancement in splitting tensile strength, particularly when 1% synthetic polypropylene fibers are incorporated. Consistency in the study is evident, with an average correlation factor of 0.995 in comparison to previous research. The decision-making model highlights the 1% synthetic polypropylene fiber mix as the most suitable, especially at the 100-minute mark, with a weightage of 0.118. This model provides a practical solution to minimize wastage, conserve resources, and cut costs in construction projects affected by delays in casting
Experimental study on transverse behavior of concrete box girder bridges with strutted wing slabs
Full text linkIn 2023, the first box girder bridge with strutted wing slabs in Vietnam was put into use in the Ring Road II Viaduct Project in Hanoi. As this is an innovative type of traditional box girder bridges and completely new in Vietnam, prior to the commencement of the project, an experimental program was conducted to check the construction technology and obtain valuable experimental data for design and further numerical analyses. A full-scale girder segment with a width of 18.7 m, a length of 6 m and height of 2.5 m, incorporating steel pipe struts, was fabricated. Three distinct load cases were conducted to investigate the transverse behavior of strutted wing slabs, steel pipe struts and connections under the most unfavorable load conditions at Service Limit State. This paper presents a detailed experimental program with test results. It is shown that with applied loads varying from 1.2 to 1.5 times the service load, both the deck slab and steel pipe struts still exhibited linear manner, maintaining sufficient load-bearing capacity. However, with increased applied load in Load Case 2, cracks occurred along the construction joint region, indicating that attention to construction joint quality in real projects is needed to pay great attention to ensure the integrity of structures. Based on the conducted experiment, some recommendations are proposed for future implementation of such bridge typologies
Effect of Coarse Recycled Concrete Aggregate on the Microstructural and Durability Properties of Self Compacting Concrete
Full text linkThis paper presents the influence of different amounts of Coarse recycled concrete aggregate (CRCA) obtained from a Construction and Demolition Waste (CDW) Plant in Delhi, on the durability properties of a 40 MPa Self Compacting Concrete (SCC). Aggregate Packing (bulk) Density (APD) method was adopted to obtain an aggregate mixture exhibiting maximum bulk density/least void content (45%) with which the SCC mixes was prepared. In addition, SCC was also made using aggregate mixtures in which the Natural coarse aggregate (NCA) was replaced with CRCA at 0% and 100 % (of the total coarse aggregate content). It has also been observed with the Mercury intrusion porosimetry (MIP) and Scanning electron microscopy (SEM) analysis that the incorporation of fly ash in SCC mixtures containing different contents of CRCA, resulted in the production of SCC-CRCA mixtures, with higher/comparable performance to that of control SCC mixture. The test results indicated that the SCC mixtures SCC mixtures exhibited very low chloride ion permeability at 28 days, lower carbonation depth. SCC made with CRCA up to 45% replacement can be used for structural concrete which is higher than that recommended in Indian specification (20 %) for normal concrete
Predicting shear capacity of Recycled Aggregate Concrete beams using Artificial Neural Network
Full text linkThis study investigates the application of an Artificial Neural Network (ANNs) utilizing a Multi-Layer Perceptron (MLP) architecture to predict the shear capacity of Recycled Aggregate Concrete (RAC) beams. The ANNs model was trained using the Levenberg-Marquardt algorithm with a comprehensive dataset comprising 232 experimental shear tests, reflecting a wide range of variables relevant to RAC beam performance. The model's predictions were compared to those derived from established design standards, including ACI 318-14 and Eurocode 2, to evaluate its performance. Various statistical criteria were employed to assess the model’s accuracy and reliability in predicting shear strength, including metrics that measure goodness of fit, error rates, and predictive consistency. This research highlights the growing potential of machine learning techniques in civil engineering, particularly for enhancing the precision of shear strength predictions for RAC beams. The findings suggest that the ANN model offers a valuable alternative to traditional prediction methods, with the potential to improve accuracy and address some of the limitations inherent in conventional design standards
Analysis of the behavior of composite steel beam and lightweight concrete slab with glass fiber reinforced composite
Full text linkThis study proposes a novel design for lightweight concrete slabs reinforced with glass fiber-reinforced polymer (GFRP) for application in steel girder bridges. The lightweight concrete, with a compressive strength of 30 MPa, incorporates Keramzit as a lightweight aggregate and GFRP reinforcement to construct the bridge deck slabs. Numerical simulations are conducted to analyze the behavior of the slabs under both static and dynamic loading conditions, adhering to standard load combinations. The results demonstrate that the proposed lightweight concrete slabs offer significant weight reduction, improved load-bearing capacity, and enhanced durability compared to traditional concrete. The finite element analysis using Midas FEA software reveals minimal deformation and cracking under dynamic loading, with a maximum displacement of 0.641 mm, well within safety limits. Furthermore, GFRP reinforcement exhibits superior performance in reducing tensile stress and minimizing crack propagation. These findings validate the feasibility of integrating GFRP-reinforced lightweight concrete slabs in steel girder bridges, offering a cost-effective, sustainable, and efficient solution for modern bridge construction, particularly in Vietnam's demanding infrastructure environment. The study provides a strong foundation for future computational modeling and experimental investigations to further optimize this innovative structural design
Mother Language and Language Policy Planning Planification de la langue maternelle et de la politique linguistique
Full text linkLanguage is a means of existence, expression and communication, a symbol of individual, social and cultural identity, a code for preserving civilization and the delivery of knowledge, and a basic base upon which to build society in its unity, development, renaissance and leadership. Thinking and striving to preserve the language increased with the end of World War II. Identity, national unity and comprehensive development; which all led to the outbreak of civilized battles taking place on multiple interfaces in order to control the centers of linguistic influence. Language is the mother of references in the construction of the civilized architecture and the building of its cultural edifice. In this research, we work on clarifying the nature of the mother tongue and planning the language policy, and showing successful experiences in this field among civilized peoples who gave all importance to their mother tongue in order to prepare, strengthen, develop and promote it
المرآة وسؤال الهويّة في تجربة أدونيس الشّعريّة
Full text linkmany of his poems while trying to experiment new artistic techniques, thus developing and enriching his own poetic project. Given that the theme of the mirror is closely associated with identity question, we wanted to investigate its forms of presence in his poetry and explore its meaning about the nature of identity that the Self is trying to achieve. Whether the mirror in Adonis’s poetry is predicated on metaphor or chiasm, it reflects the Self’s rejection of the ready-made identity and its attempt to create a versatile identity open unto the Other, which is a horizon for a new Being. The breaking of the mirror and even its killing has been recurrent in Adonis’ poetry because the Self refuses the constant and transcendent identity and yearns for inaugurating multiple and new identities