Université Mouloud Mammeri de Tizi Ouzou (UMMTO): Research Review of Sciences and Technologies
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موتيفة أكل لحم البشر في الحكاية الشعبية القطرية الغرف الأخرى أنموذجا
Get PDFThe phenomenon of cannibalism is a frequent motif in the Qatari folk tale, because of its narrative capabilities that are based on attracting the recipient by inducing feelings of fear in him, and within this motif there are three basic elements: the eater, the eater, and the cook, but there are several other elements. associated with it; Such as the inattentive eater, the stalker eater, the stigma, and the societal stigma. This motif represented the centrality of the tales sometimes, while it was present at other times to lower degrees, and this motif comes as a middle event as the tale does not begin or end with it. This motif intersected with its counterparts in Arab popular culture on the one hand, and research on it reveals its presence in international folk tales on the other. Eating human flesh has appeared in real and miraculous tales, that is, it is an act attributed to humans and the jinn alike, but this phenomenon requires that all parties be human, so this study has been limited to stories in which the eater and the eaten are human, The tales in question are: Hadid Hadiduh, Surur (in two copies), Laibah al-Sabr, Tuwaisa al-Sabr, and Nassif
التمثيل الثقافي في الرواية الجزائرية المكتوبة بالفرنسية لمرحلة ما بين الحربين
No full textThis article focuses on the Algerian novel of French expression between the wars, given that this is the first embryonic phase of the Algerian novel, having known nine novels, the least that can be said is that they have not been the subject of many studies, nor have they attracted the interest of researchers, especially in Arabic. What attracts attention in all of these novelistic texts is the relationship that exists between the visible ideological aspect and the cultural references and intellectual foundations of the writers, as well as the specificity of the cultural representation, its features and aspects of its conversion, or rather its elevation, to a cultural reaction to the colonialist policy of assimilation and erasure of the Algerian self
القصيدة الثّورية أثناء الحرب التّحريرية، البناء والجمالية (منطقة القبائل والشّاوية أنموذجا)
Get PDFThe revolutionary poetry is more widespread because it is linked to the national sense, and it is also an indicator of a conscious culture, which reveals that relationship between the nation and individuals, something that makes it (i.e. the individual) established within the base of its origins: home, struggle and wealth, and the poetic content of these poems reveals new visions about the meanings of the nation and the nation and about resistance, struggle and revolution. This revolutionary jihadist content was one of the most prominent topics of overriding concern because it is considered to be true to the revolutionary spirit of Aurassia mankind and Kabylie. These poetries have been and continues to be the historical record that has preserved prominent events and sites in the history of the revolution, along with important figures and symbols, because inviting personalities is one of the most important artistic means to invoke the stories of the rich people. In this article, we will try to illustrate the dimensions and backgrounds of these poems associated with the national and revolutionary sense of image reflected in the content of these poem
Application of recycled aggregate in sprayed mortar and shotcrete
Get PDFNew uses for concrete waste should be investigated to counter the expected increase in its production due to upcoming construction projects. The developed method should be a high-value recycling method that improves resource diversion and environmental preservation. This study was aimed at expanding concrete waste recycling by investigating the feasibility of using low-quality recycled aggregate from demolished office buildings for sprayed mortar and shotcrete, intended for slope protection and cross-section repair, respectively. Additionally, demolished wood chips were incorporated into the sprayed mortar. The study explored mix proportion base mortar and concrete before spraying (prior to adding the quick-setting admixture); confirmed application conditions; and evaluated fresh properties, spraying conditions, and various performances, including compressive strength, static modulus of elasticity, and accelerated carbonation depth using core specimens. Results confirmed that, with appropriate design considerations for performance degradation, low-quality recycled aggregate could meet the required performance criteria as materials for sprayed mortar and/or shotcrete
Determine train load and speed based on dynamic displacement results
Get PDFThe load and operational speed of trains on railway bridges play a significant role. In the context of increasing demand for rail transport, accurately determining these parameters not only helps ensure safety but also brings economic benefits and optimizes system efficiency. This research aims to determine the load and speed of trains based on dynamic displacement results obtained from sensors installed on railway bridges. The study was applied on a real urban railway bridge. The dynamic displacement data of the railway bridge under the influence of passing trains is collected using high-sensitivity LVDT sensors. By applying finite element models (FEM) and real-time displacement data analysis combined with optimization algorithms, the estimation of train load and speed is performed. The analysis results show that the estimated load and speed values are relatively accurate compared to reality. This method helps to accurately monitor and manage train load and speed. The research findings will contribute to improving safety, operational efficiency, and provide a solid scientific foundation for enhancing the railway transportation system
Study on flexural behavior of ultra-high-performance concrete beams using finely ground rice husk ash
Get PDFThis research explores the application of finely ground rice husk ash (RHA), an agricultural waste material, in the production of ultra-high-performance concrete (UHPC). Due to its elevated SiO2 content and small particle size, RHA is considered a potential substitute for silica fume in UHPC mixtures. The study investigates the flexural behavior of UHPC beams using RHA as a replacement for silica fume at replacement levels of 25% and 50%. The flexural behavior relationships, including load-deflection, stress-strain, and crack characteristics, will be determined. The experimental results indicate that UHPC beams reinforced with 10% RHA+10% SF exhibit initial crack loads, yield loads, and maximum loads comparable to the reference UHPC beams. The load-deflection relationship curves of the RHA-incorporated UHPC beams demonstrate greater stiffness than the reference beams during the linear phase. These results were also compared with simulations, showing a high level of consistency. The research findings provide important insights into the potential application of finely ground rice husk ash in UHPC, paving the way for new developments in sustainable and economically efficient construction materials
Determination of Substructure and Sub-ballast Layer Thickness of High-Speed Railway
Get PDFThe thickness of trackbed layers plays a crucial role in distributing train loads to ensure that stresses on the sub-ballast and substructure remain within acceptable limits. Vietnam is currently studying the construction of a high-speed railway (HSR) on the North-South axis, with two scenarios involving train axle loads of either 17 tons/axle or 22.5 tons/axle. This study focuses on determining the appropriate thickness for the sub-ballast and substructure layers to accommodate these axle loads. Using analytical methods, calculations were performed to determine optimal trackbed thickness. The results indicate that for an axle load of 17 tons, the substructure thickness should be approximately 1.75 m, while the sub-ballast layer should be around 0.27 m. In contrast, for axle load of 22.5 tons, the substructure thickness increases to about 1.94 m, and the sub-ballast layer thickness grows to approximately 0.36 m. These variations highlight the impact of axle load on trackbed design. The substructure layer's thickness is particularly important as it directly influences stress distribution throughout the trackbed. A well-designed trackbed ensures the structural integrity of the railway system, sufficient load-bearing capacity, and cost-effective construction. Proper determination of layer thickness is essential to balance performance, durability, and economic feasibility in high-speed railway infrastructure projects. This research provides a foundation for optimizing trackbed designs in Vietnam's high-speed railway scenarios, contributing to safer and more efficient railway operations
Empirical vibration investigation of homogeneous ground with shallow tunnel by low-frequency excitation
Get PDFUrban tunnels and underground structures usually stay at small overburden heights. The insight of shallow underground structures' behaviours is challenging. Low-frequency seismic waves can create significant deformations to civil structures, so the prediction and warning of the damage possibility of a low-frequency earthquake to the civil infrastructure has attracted research attention. This paper presented an experimental investigation on a physical model including a homogeneous ground and a shallow tunnel. The model underwent an artificial harmony low-frequency excitation created by a 2x2m shaking table. The vibration characteristics of the model’s components were studied and discussed. The accelerograms and the FFT spectrum analysis was realised to understand the similarity of the input and output signals. The Cumulative Absolute Velocity and the Arias Intensity were determined and the correlation between them was investigated. The results proved the complexity of the vibration behaviours of the physical model during the artificial earthquake. The severe effect of the low-frequency excitation on the ground and underground structure motion was also detected
Determination of Equivalent Temperature for Asphalt Pavement Design in Vietnam
Get PDFTemperature is a critical factor influencing asphalt pavement performance and its service life. Current pavement design practices in Vietnam, however, rely on fixed temperature values, disregarding regional climatic variations. To address this limitation, this study introduces a revised concept of "equivalent temperature", which is a representative temperature value that accounts for daily temperature fluctuations over a 20-year period. The objective is to enhance the accuracy and durability of pavement design by determining region-specific equivalent temperatures. Utilizing temperature data from 127 weather stations spanning 20 years, a gridded temperature map of Vietnam is constructed. The Shell method is employed to calculate Weighted Mean Annual Pavement Temperatures (WMAPTs) for each station. Results reveal significant spatial variability in WMAPTs across the country, ranging from 30°C to 41°C. These findings underscore the inadequacy of a singular design temperature for Vietnam's diverse climate. The calculated WMAPTs offer a valuable dataset for estimating asphalt moduli and informing future pavement design and research efforts, ultimately contributing to improved pavement performance and extended pavement service life in Vietnam