Université Mouloud Mammeri de Tizi Ouzou (UMMTO): Research Review of Sciences and Technologies
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الغرب والشرق أو لعبة المرايا المتناظرة على ضوء الكتابات الفكرية العربية المعاصرة
Full text linkWe will attempt to start building our vision for this research topic from the following premise: any discussion about the mega-identities—namely, the East and the West—is fraught with difficulties and pitfalls. This is due to the fact that both concepts have undergone a process of intellectual exhaustion, transforming into ideological constructs that have been utilized within the framework referred to in political literature as the clash of civilizations and the struggle of identities. After reading a number of Arab intellectual works, we have come to the conclusion that the mechanisms that the West relied on in producing its reductionist view of the East are to some extent the same mechanisms that the East employed in constructing its perceptions of the Christian and Jewish Wes
Enhancing Mechanical Properties of High Strength Concrete with Nanomaterials, Copper Slag, and Steel Fibers: Experimental Study and Predictive Modeling
No full textThis research investigates methods to improve the performance of high-strength concrete (HSC) using advanced and sustainable materials. Nanomaterials such as Nano silica and Nano alumina were incorporated as partial replacements for cement, while copper slag was utilised to partially substitute fine aggregate. Additionally, steel fibers were added to assess their influence on the mechanical properties of HSC. The study developed three concrete mixtures: a control mix (CO) containing 30% Ground Granulated Blast Furnace Slag (GGBS) with a water-cement ratio of 0.38, a mix with varying copper slag replacements (CCS) at levels between 10% and 50%, and an optimised mix (CCSNSA) combining 2% nanomaterials with the most effective copper slag proportion. Steel fibers were introduced into all mixtures in varying amounts, ranging from 0–2% by volume. Experimental results demonstrated that including steel fibers significantly enhanced the compressive, tensile, and flexural strengths of concrete. Furthermore, predictive models were developed for the strength characteristics of all mixes, and their outputs showed a strong correlation with experimental data. This study highlights a sustainable and effective approach to enhancing the mechanical performance of HSC by integrating copper slag, nanomaterials, and steel fibers
An Examination of Reclaimed Asphalt Pavement's Role as Aggregate in the Composition of Structural Concrete: An Extensive Overview
Full text linkThe process of renovating flexible pavement produces an extensive amount of reclaimed asphalt pavement (RAP). These aggregates are frequently discarded, whether through legal or illegal means, in nearby locations, thereby creating various challenges for regulatory bodies. The incorporation of these aggregates into portland cement concrete (PCC) mixtures represents an innovative strategy that could yield significant socio-economic and environmental advantages. Nonetheless, the inclusion of RAP aggregates may also adversely impact both the soundness and performance characteristics of the concrete. This paper delivers a detailed and critical evaluation of the practicality of employing RAP aggregates in concrete production, while also pinpointing several shortcomings that must be rectified to enhance sustainability in construction methodologies. This paper is structured in the following manner: it initiates with a detailed characterization of RAP aggregates, followed by an analysis of the characteristics of fresh concrete containing RAP, and culminates in an exploration of RAP containing concrete mechanical and durability characteristics. According to the literature review, it is evident that aggregates derived from RAP are generally of a lower quality than their natural counterparts. This may not pose a significant issue regarding the characteristics of the fresh concrete. The asphalt film and the presence of agglomerated particles within the RAP were identified as key factors contributing to the diminished strength and durability characteristics. The integration of RAP as aggregates has been associated with notable advantages, including improved toughness. Furthermore, existing research suggests that the performance of concrete containing RAP can be enhanced through the processing of RAP in conjunction with using supplementary cementitious materials (SCMs) or fibres
Enhancement of Mechanical Properties of Unfired Clay Bricks Using Rice Husk Ash and Fibre Reinforcement
Full text linkThis study investigates the production of unfired clay bricks incorporating cement and rice husk ash (RHA) as a binder, with rice husk (RH) serving as fiber reinforcement. The need for eco-friendly building materials is critical, as cement production contributes 7-8% of global CO₂ emissions, and while fired clay bricks are stronger, their high production cost due to significant energy requirements makes them less sustainable. Providing lower-cost building materials can reduce rural-to-urban migration and make housing more affordable for low-income earners. RH fibers were added in varying volumes (0, 5, 10, 15, 20, and 25 vol%) while maintaining a constant RHA and cement content of 10 vol.%. The mixed clay bricks were dried for seven days and cured at room temperature (22°C to 28°C) for 21 days, totalling 28 days of curing. Mechanical properties, including compressive strength, flexural strength, and fracture toughness, were evaluated alongside the chemical composition and textural characteristics of the clay and RHA. Particle size distribution (PSD) analysis classified the clay as sandy clay with higher sand content, determined using sieve analysis and the hydrometer method. X-ray fluorescence (XRF) confirmed that the RHA met NIS/ASTM standards, with a minimum of 70% combined SiO₂, Al₂O₃, and Fe₂O₃, qualifying it as a pozzolanic material. Optimal mechanical performance was observed at 5% RH fiber content, with fibers 2-4 mm in length, achieving compressive strength of 7 MPa, flexural strength of 2.1 MPa, and fracture toughness of 2.15 MPa√m, while fiber content beyond 5% resulted in gradual declines, particularly significant after 20%. The study concludes that RH fiber-reinforced composites are suitable for lightweight, durable building materials, promoting environmental sustainability and improved performance
The Death of Individuality: “Herd Mentality” and Kantian Infantilism in Don DeLillo’s White Noise La Mort de l'Individualité: La « mentalité de troupeau» et l'infantilisme Kantien dans Bruit de Fond de Don De Lillo
No full textSince the Enlightenment, philosophers warned against the self-effacing effects of conformity that reduce the individual to a sheepish pawn, herded by self-proclaimed figures of authority. This article explores the loss of identity linked to such dependence on the crowd, as illustrated in Don DeLillo’s White Noise. It explains the potential reasons behind embracing the “herd mentality” and demonstrates the many strategies people adopt to seek the acceptance of the groups they affiliate with. From constructing a persona that dissimulates one’s inadequacies to the replication of other’s behavior, it follows characters who sacrifice their uniqueness for the comfort of collectivism. Finally, the article shows how easily the crowd-dependent individual surrenders his own judgement and reverts to an infantile reliance on others.
Utilization of recycled concrete aggregates mixed with fly ash as the road base materials in Vietnam
Full text linkRecycling of construction and demolition waste (CDW) and industrial by-products presents substantial environmental, economic, and social benefits. In developed countries, recycling efforts have been actively promoted for decades, resulting in a high proportion of CDW and industrial by-products being reutilized. However, in developing nations, including Vietnam, the recycling rate of such materials remains relatively low. This study investigates the utilization of the mixtures of recycled concrete aggregates (RCA) and fly ash (FA) as road base materials in Vietnam. In which, FA functions as the fines within the aggregate gradation and is varied from 0% to 20%. A series of laboratory tests was conducted to assess the mechanical behavior of the prepared samples. The findings demonstrate that FA can effectively substitute fines in aggregate mixtures for road base layers, with an optimal content of 5%. The pozzolanic reaction of FA contributes to an enhancement in the California Bearing Ratio (CBR) of RCA-FA mixtures compared to that of natural aggregates, ensuring compliance with required bearing capacity standards, except for specimens containing 20% FA. Moreover, the adhesive mortar generated through the pozzolanic reaction of FA exhibits lower bonding strength than that formed by RCA fines, leading to a lower CBR value and a higher particle breakage index in RCA-FA mixtures compared to RCA-only samples
تجانس المنهج السيميائي مع المناهج الأخرى في سورة الرحمن من خلال كتاب نظام الخطاب القرآني (لعبد الملك مرتاض).
No full textThis study primarily aims to provide a critical analysis of the book "The System of Quranic Discourse: A Compound Semiotic Analysis of Surat AR-Rahman" by the researcher Abdul Malik Mortath. This is achieved through examining the mechanisms and procedures employed by the critic in his book, which in turn adopted a structural approach by linking semiotic methodology with stylistic methodology, considering them as complementary critical methods, in addition to other traditional approaches such as interpretive and statistical methodologies. The study also seeks to identify the key reasons that facilitated the critic's application of Western methodologies to the Quranic text, as well as to investigate the mechanisms embodied in the Quranic discourse within the problematic framework: How responsive is the Quranic discourse to semiotic analysis procedures? What are the most significant semiotic procedures employed by the critic in Surah AR-Rahman? Among the results obtained is the importance of using the structural approach in understanding and analyzing the Quranic text by linking the semiotic approach with other methodologies as a means to clarify meanings and understand the symbols of the Quranic text. This study also significantly reflected the extent to which the Quranic text responds to both semiotic and stylistic methodologies in deciphering the Quranic discourse cohesively
منطق العجيب في نوادر البخلاء للجاحظ
Full text linkThis study focuses on the anecdotes published in "The Miserly" by Al-Jahiz, the renowned Arab writer known for his humorous and satirical works. The study first explores the concept of the "strange/odd" in Al-Jahiz's writings, and its link to the strange in the old Arabic literature. Secondly, the study analyzes Al-Jahiz's logic of the strange by examining themes characterized by conflict, contradiction, and intertwining. The findings indicate that the concept of the "odd" includes both humorous and serious matters. The study also highlights the significance of the concept of "contrast" which goes beyond the literary expression in narrative and discourse contexts, extending into the persuasive and argumentative role it plays in depicting the ugly miserly characters. This enabled Al-Jahiz to form an attitude towards the miserly and to see it in the context of an ideological conflict between this group of people and the society
القــــراءة الضمنية لمعلقة عنــــــترة بن شـــــــداد بين استراتيجيات التلقي وتأويل المعنى
Full text linkAncient Arab poetic heritage remains an imaginative treasure that is not fully explored using various modern critical mechanisms, especially the concepts of reception theory, which can delve into the hidden meaning of the text that the reader forms and activates, unlike what structuralism did, which sufficed with interpreting textual patterns away from poetic meaning.Therefore, reception theory can be employed in reading ancient Arab literary texts, in order to discover the role of the recipient in building its gaps and hidden meanings. This study has worked on this by activating the concept of the implicit reader, in revealing the imaginations of the text of Antarah bin Shaddad's Mu'allaqa. This is why the interpretive work in analyzing Antarah bin Shaddad's Mu'allaqa came in accordance with the data of this theory, especially with regard to the concept of the implicit reader of the text.This study confirms that the pre-Islamic poet is a conscious and aware entity of the requirements of the literary creation process, because he places in his mind that inevitable presence of the reader who is an essential partner in the birth of the literary text and the creation of its superficial and deep meanings. It is as if the pre-Islamic poet realizes that his text will be read by recipients from different times and with various critical and analytical mechanisms. Therefore, the researcher must realize this equation when understanding the pre-Islamic poetic discourse