bluuebunny/crossref_metadata_2025 huggingface dataset:
Characteristics of hydraulic jump in asymmetrical trapezoidal channel with rough beds: experimental investigations
Authors: Benabid Seyfeddine , Cherhabil Sonia , Ouakouak Abdelkader , Bedjaoui Ali
Published: December 2024

Understanding the dynamics of hydraulic jumps is crucial for optimizing the design of stilling basins in dams, enhancing energy dissipation efficiency, and reducing corrosion risks in hydraulic structures. This work aims to investigate the effect of bed geometry and roughness on the properties of hydraulic jump in an asymmetric trapezoidal channel, including parameters such as sequential depths, roller length and energy loss. Experiments were carried out under open channel flow conditions using three different bottom roughness element heights    and  mm. The channel's bottom is inclined transversely with a slope of  covering a wide range of inflow Froude Number . Results indicate that the increase in bottom roughness leads to a decrease in the subsequent depth ratio by 28.91% compared to a hydraulic jump in a smooth bed. It was also found that the average reduction in roller length on the shallow and deep sides is 21.62% and 20.4%, respectively. Increasing the height of the roughness element enhances the relative energy dissipation by 8.53%. Finally, empirical equations were developed to describe hydraulic jump characteristics based on the Froude number and roughness element height, aiding in the optimal design of stilling basins.
Outdoor thermal comfort in face of the urban heat island effect: innovative solutions for cooler cities; a case study in Souk Ahras city
Authors: Fatma Khelifa , Eddine Khelfa Imed , Alkama Djamel , Mahimoud Aissa
Published: December 2024

This study investigates the relationship between the urban heat island effect and outdoor thermal comfort through a bibliometric analysis of relevant keywords, highlighting their strong connection. The analysis highlights how trees improve urban microclimates and enhance outdoor comfort by integrating them into public space design. The research in Souk Ahras city investigates two public spaces, using in situ measurements and the Rayman model to analyze thermal indices (SVF, Tmrt, and PET) based on climatic data and urban geometry collected on a hot summer day. The findings show that trees at each intervention site reduce average daily air temperature by 0.43°C to 1.043°C, lower mean radiant temperature (Tmrt) by 1°C to 1.2°C, and decrease physiological equivalent temperature (PET) by 0.16°C to 1.58°C. Trees also reduce the sky view factor, highlighting their role in improving outdoor thermal comfort through shading and evapotranspiration. These results confirm that integrating trees into public space design effectively enhances outdoor thermal comfort and urban microclimates during warmer seasons.
Optimal power flow solution incorporating hybrid conventional and renewable resources using electric eel foraging optimization algorithm
Authors: Fellahi Anwar , Mouassa Souhil , Mellah Hacene
Published: December 2024

In recent years, metaheuristic algorithms have become the main tool in solving the Optimal Power Flow (OPF) problem due to their effectiveness in addressing complicated modern power systems. This complexity is fueled by the rise of Renewable Energy Resources (RERs) and the need to decrease greenhouse emissions. This research presents a comprehensive approach that aims to optimize the performance of power networks in the presence of thermal, wind, and Solar Photovoltaic (SPV) units. The algorithm implemented is named Electrical Eel Foraging Optimization (EEFO). It is carried out using the modified IEEE 30-bus test system. EEFO is compared alongside Kepler Optimization Algorithm (KOA) and Self-adaptive Bonobo Optimizer (SaBO). Two cases were taken into consideration. The first one is minimizing the Total Generation Cost (TGC); the second is minimizing generation cost, including the emission effects. The results show a reduction in TGC at 781.1981 $/h and 792.6531 $/h for the first and second cases, respectively; emissions were also decreased compared with previous studies. The findings obtained in this research show the validity of the proposed EEFO algorithm.
Analysis and numerical treatment of a thermo-electro-visoplastic frictional contact problem with adhesion and internal states variable
Authors: Hamid Achab , Ilyas Boukaroura , Abdelmoumene Djabi
Published: December 2024

We consider a frictional contact problem between a thermo-electro-viscoplastic body and a conductive foundation. The contact is frictional; it is modeled with normal compliance, and the adhesion of the contact surfaces is taken into account. The material has internal state variables. We derive a variational formulation for the model and prove the existence of a unique weak solution to the problem. The proof is based on results for elliptic variational inequalities, differential equations, and fixed-point theory. Finally, we present a finite element algorithm to approximate solutions to our problem and provide an error estimate for these approximations.
Corrosion inhibition effects of celery (Apium graveolens) seeds extract on carbon steel in acid medium
Authors: Remache Malika , Khelfaoui Malika , Rahim Mohamed , Bouhadiba Abdelaziz , Zouied Daoiya , Chekroud Hassina
Published: December 2024

The present study highlights the inhibition performance of celery seeds (CS) extract on carbon steel immersed in 1M HCl, using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization methods. This extract is selected due to biodegradable, renewable, and foremost aspect, is safe towards both the human being and environment. The studied inhibitor was easily extracted by using a simple aqueous extraction procedure. The experimental results show that the investigated inhibitor can effectively retard the corrosion process that occurs to carbon steel in hydrochloric acid solution. Electrochemical impedance spectroscopy (EIS) spectra showed that inhibition efficiency increases with the increasing of (CS) extract concentration. Among the studied inhibitor showed maximum inhibition efficiency of 96,86% at 250 ppm. Polarization curves indicate that (CS) extract acted as mixed type of inhibitors with a predominant effect on the anodic reactions. Basic calculations for the adsorption studies were also carried out. The adsorption of the extract onto carbon steel surface followed the Langmuir adsorption isotherm.
Numerical study of the influence of the geometrical aspect ratio and nanoparticles diameter on forced convection in a micro-channel heat sink of a nanofluid water/CuO based on a Brownian diffusion model
Authors: Rabah Nebbati , Mahfoud Kadja
Published: December 2024

In order to cool electronic equipment with a high efficiency we can use the flow of a nanofluid in a rectangular micro-channel heat sink. The paper reports the results of the study of a hydrodynamically fully developed laminar forced convective heat transfer flow in two different geometries G1and G2. The study is numerical and was achieved using   as nanofluid with   and a single-phase approach. Calculations were first made with constant thermo-physical properties at  and then made using temperature and nanoparticles diameter dependent thermo-physical properties based on a Brownian diffusion model. A three-dimensional conjugate heat transfer model was used and numerical simulations were based on a finite volume method. The simulations were made for a range of Reynolds numbers  , for nanoparticle diameter in the range of  and for a heat flux through the bottom surface of the heat sinks .The results of thermal and hydrodynamic fields show that nanofluids can provoke an increase in the local and average Nusselt numbers, a decrease of bottom surface local temperature and a slight decrease of the shear stress on the wall, particularly in the case of geometry G2. At the end of the study, the best geometry, volume fraction of nanofluid and nanoparticle diameter to be recommended for cooling were found based on minimum total thermal resistance of the micro-channel heat sink.
Analyzing real-time communication: Arduino-based Controller Area Network (CAN) in electric vehicle
Authors: Ammar Merazga , Djamel Rahem , Fateh Moulahcene , Djemai Kebbal
Published: December 2024

The increasing complexity of electric vehicles (EVs) and the growing demand for propulsion and driver assistance have strengthened the need for CAN networks. This necessitates a detailed analysis of communication and CAN bus utilization. A low bus load does not guarantee a valid design if response times are insufficient. This paper presents a response time analysis (RTA) of a distributed real-time control system that uses an Arduino-based CAN network and an MCP2515 interface to check if the system can be scheduled. The RTA is based on calculating the worst-case response time of the message (WCRT), which is its longest response time.  The prototype EV houses a system consisting of four (4) real-time embedded CAN nodes. We have implemented a PID controller within the motor speed control node. Based on existing literature, we proposed an algorithm to calculate the WCRT of the control system messages and another to address the priority inversion issue in network communication. The experimental results for the PID controller are satisfactory. The controller reaches the target speed with minimal oscillations with values 478ms, 31.81s, 0.62%, and 2.57%, corresponding to time rise, settling time, steady-state error, and overshoot at 90 rpm, demonstrating its robust performance. Experimental results confirm the scheduling analysis of the system with a low bus load (0.9% at 500 kbps). The tests conducted on the experimental and SAE benchmark data show that validity depends on message schedulability, bus load, and bandwidth. A system may be schedulable at 500 kbps but not at 125 kbps with the same traffic.
Sustainable lightweight concrete with EPS beads and cork additives: a study on physico-mechanical properties of eco-friendly composites
Authors: Herihiri Ouided , Ouldkhaoua Younes , Belgacem Mohamed El Ghazali , Hernoune Houria , Zitouni Mohamed
Published: December 2024

This study investigates the properties of lightweight concrete composites incorporating expanded polystyrene (EPS) and cork as aggregates, focusing on their effects on density, thermal performance, and mechanical strength. The results show that using EPS and cork significantly reduces the density of the composites, making them suitable for applications where weight reduction is critical, such as in energy-efficient building materials. Additionally, the thermal conductivity of these composites decreases substantially, enhancing their insulating properties. However, the reduction in density is coupled with a significant decrease in compressive strength, with values up to 94% lower than conventional concrete. This limits the use of these lightweight composite materials to non-structural applications or situations where low load-bearing capacity is acceptable. The study also reveals an increase in porosity and capillary water absorption in the composites, which may compromise their durability, particularly in environments with high moisture exposure. In conclusion, lightweight concrete composites incorporating EPS and cork offer considerable advantages in terms of reduced weight and improved thermal insulation. However, for structural applications or where higher mechanical performance is required, adjustments such as the inclusion of reinforcing materials or reducing the lightweight aggregate content may be needed to ensure optimal performance and durability.
Kinetic adsorption and isotherm models of nickel
Authors: Bekiri Fedia , Rehali Hanane , Hayet Menasra , Khadija Hamida , Majida Charif
Published: December 2024

The study investigated the adsorption capacity of Pinus halepensis Mill biomass (PHM) that has been modified to remove nickel (II) from aqueous solutions. The underwent chemical modification using zinc chloride (0.1N) to produce activated carbon.  The resultant products were analyzed using Fourier transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. Several variables were taken into account to achieve optimal adsorption conditions. These factors include the duration of agitation, the starting concentration of copper, and the pH level. Consequently, the highest level of efficiency was obtained at 90 mg/g when equilibrium was established after 120 minutes. The pseudo-second-order kinetic model offers a more appropriate characterization of the adsorption kinetics. Nickel adsorption adheres to the principles of the Langmuir and Freundlich isotherms. The Langmuir isotherm model produces the most favorable parameters. The adsorption capacity increased with the elevation of the initial concentration (from 1000 to 400mg/l) employed in this work at a neutral pH and 25°C in temperature.
Advancing self-compacting concrete performance with the use of combined marble waste as fine and coarse aggregates
Authors: Belgacem Mohamed El Ghazali , Ouldkhaoua Younes , Herihiri Ouided , Sadoudi Lyacia , Arroudj Karima , Ouadi Redouane
Published: December 2024

Environmental protection through waste recycling is one of the major challenges of our time. Inert waste, mainly generated by industry, makes up a significant portion that harms the environment due to its accumulation in nature.The primary objective of this study is to examine the influence of marble waste valorization as sand and gravel on the rheological and mechanical properties of self-compacting concrete (SCC). For this study, marble was used as fine aggregate sand (MAS) at rates of 10%, 20%, and 30%, and as coarse aggregate gravel (MAG) at a rate of 100%. The results of this study demonstrate that the introduction of marble waste (MW) as aggregate positively influenced the rheological characteristics, notably reducing the need for superplasticizer dosage. Additionally, in terms of mechanical outcomes, the use of MAG led to improved mechanical strengths.
Simulation study of the effects of different materials used in the core of a TSV inductor on its behavior when integrated into a DC/DC converter
Authors: Namoune Abdelhadi , Taleb Rachid , Benzidane Mohammed Ridha , Mansour Noureddine , Saidi Hemza , Tahraoui Souaad , Benbouzid Zineb , Houari Habiba
Published: December 2024

This research focuses on the design and modeling of a Through-Silicon via (TSV) inductor, tailored for integration within an interleaved boost converter. The TSV inductor features a winding structure designed with vertical TSVs linked to horizontal rectangular connections, creating an efficient topology. A comprehensive electrical model has been developed to account for all parasitic effects arising from the various physical components of the TSV inductor. MATLAB software was employed to analyze the influence of different materials used in the construction of the TSV inductor, with the goal of optimizing its inductance values and quality factor. This approach involved selecting materials that minimize energy losses, thereby enhancing the overall performance of the inductor. To validate the electrical parameters derived from the physical characteristics and material properties, the TINA simulation software was used. It simulated the interleaved boost converter circuit incorporating the TSV inductor’s equivalent electrical circuit for accuracy verification.
Management of groundwater resources in the Tolga region (south-east Algeria)
Authors: Mohamed Khelalfa , Nora Bouchahm , Warda Chaib
Published: December 2024

This study attempted to assess and map the quality of Tolga's groundwater in order to determine its suitability for human consumption and agricultural use. The results of analyses of the physicochemical parameters of the water samples were compared with WHO potability standards and standard agricultural water quality indices, namely sodium adsorption ratio SAR ,Soluble sodium percentage Na% , Magnesium risk MH  , Kelly ratio KR and permeability index PI. According to the results analysed, most of the physicochemical parameters are above WHO tolerance limits and within the limits of empirical water quality indices for agricultural use. In our study, the graphical maps obtained by kriging are fitted with theoretical variogram models that best approximate the point cloud. The suitability of these models for our sample is verified by cross-validation results. The graphical representation shows high concentrations of conductivity, salinity, calcium, magnesium, sodium, bicarbonate and chloride, which are located in the Eastern part of the region, and increase progressively from northwest to east. These waters are highly charged with salts and have maximum conductivity values.
Influence of sand type on acid resistance and capillary absorption capacity
Authors: Attia Ahmed , Hadji Tarek , Douara Taha Hocine , Guettala Salim , Queneudec Michèle
Published: December 2024

This study aims to investigate the effect of binary and ternary combinations of river sand (RS), crushed sand (CS) and dune sand (DS) on the physical and mechanical performance of concrete subjected to acidic curing environments. The RS was replaced by CS and DS in different mass proportions. The five concrete mixtures M21(RS), M04(0.6CS + 0.4DS), M10(0.2RS + 0.6CS + 0.2DS),  M15(0.4RS + 0.6CS) and M16(0.6RS + 0.4DS) were prepared. The sorptivity was evaluated by measuring the sorptivity coefficient (S, cm*s-0.5) after 28 days of submersion in distilled water. Concrete specimens were submersed in distilled water, 5% sulfuric acid (H2SO4), and 5% hydrochloric acid (HCl) for up to 180 days in order to test their acid resistance. Visual inspection, changes in mass and changes in compressive strength were used to evaluate the specimens' resistance to acid attack. The results indicated that replacing RS with CS led to an increase in sorptivity, while replacing RS with DS resulted in a decrease. When both CS and DS were used in place of RS, acid resistance in 5% HCl solution decreased. In 5% H2SO4 solution, substituting RS with CS reduced mass loss, but replacing RS with both CS and DS weakened the concrete's compressive strength.
Experimental study of porosity and permeability of stabilized earth blocks by date palm plant fibers
Authors: Abderrahmane Moulay Ali , Abdelghani Idder , Rabia Abdeldjebar , Abdelmadjid Hamouine , Leyla Fali , Youcef Boutadara , Abdelkader Bassoud
Published: December 2024

The physical behavior characteristics of stabilized earth blocks (SEBs) reinforced with date palm plant fibers (PFDP) are examined in this experimental investigation. Various compounds were prepared, including 0%, 5%, and 10% lime, 0%, 5%, and 10% cement, and a combination of 5% lime and 5% cement. Additionally, fibers were incorporated at rates of 0%, 0.25%, and 0.5% by weight for each of the compounds. The study of porosity and permeability was conducted using several methods, including total porosity estimation, total volume porosity in water, open porosity, water vapor permeability, chloride ion permeability, and hydraulic conductivity, over a period of 90 days. The findings indicated that the incorporation of fiber enhanced the porosity and connectivity of pores, resulting in increased permeability of the SEBs. The cement-based bricks demonstrated a greater effectiveness than lime in decreasing the porosity and permeability of the blocks. The formulation consisting of 10% cement and the blend of 5% lime with 5% cement demonstrated satisfactory outcomes regarding porosity and permeability. This indicates that these materials are suitable for use in construction applications that demand enhanced durability and resistance to both natural and chemical influences.
Low cost of smart unilateral street lighting system with photovoltaic power plant using particle swarm optimization
Authors: M’hamed Rebhi , Boussemaha Bouchiba , Mouaadh Yaichi , Youcef Himri , Mohammed Djelouli
Published: December 2024

The conventional street lighting system has played an important role in our modern life to keep the buildings and roads safe and active using constant light mode during all the night from the sunset to sunrise; however its high energy consumption, and maintenance cost are considered the huge challenges facing the country’s economy. The smart street light system is currently used as the best option to solve these problems. In our project a smart unilateral street light system was implemented using advanced technology in our experimental site in the south-west of Algeria. The prototype significantly decreased the consumed energy compared to that of the conventional street light system. A Standalone Photovoltaic Plant (SPP) is designed and sized to meet various energy requirements such as street light and photovoltaic pumping in order to isolate the whole system from the power grid. The Particle Swarm Optimization (PSO) algorithm is used to study the cost function to improve the economic feasibility.
Pathology of reinforced concrete constructions seismic rehabilitation assistance
Authors: Salem Elabbadi Mohammed , Allaoua Belferrag , Djamel Boutoutaou , Lakhder Djoudi , Oussama Mazzar , Abdelkader Bassoud
Published: December 2024

In severe stress, reinforced concrete structures are generally classified into three categories: red, where significant damage has occurred to the load-bearing structure; orange, where damage to the structural part is considered slight; and yellow, where the structural part is sound. The last two classes are necessarily exposed to several remedial techniques such as rehabilitation, repair, reinforcement, etc. Unfortunately, these techniques are not well detailed in all seismic building codes and regulations. Classroom buildings must be upgraded to increase their lifespan, make them more functional, and comply with new seismic building regulations. In an earthquake, structural elements are damaged (cracks, concrete bursts, steel plasticization, breakage, etc.) due to faulty execution and architectural design, which are highly detrimental to the building's response to an earthquake. For this reason, the present work aims to test a set of cases under severe loading and compare them with the healthy state to get an idea of the remediation operation. The remediation operation will be based on the diagnosis and reporting of the results.
Ictal onset zone localization by using ECOG signals
Authors: Ghezala Chekhmane , Radhwane Benali
Published: December 2024

The diagnosis of seizure onset zone is crucial in epilepsy surgery for patients having pharmacoresistant, that the localization of ictal onset zone (IOZ) is associated with epileptiform activity region, by using intracranial strip and grid electrodes of electrocorticography (ECOG). Thus, these ECOG signals determine areas of the brain which can be surgically removed by visual inspection, especially in partial epilepsy named focal seizure. However, this paper investigates recent automatic IOZ localization, based on recurrent neural network (RNN) to improve the performance of identification of IOZ. Therefore, statistical patterns in time-frequency domains are extracted after applying hybrid empirical mode decomposition (EMD) and variational mode decomposition (VMD) methods. In addition, the evaluation of this work is performed by implementation of several indicators to distinct between focal and non focal ECOG signals. Moreover, the experiment results using Bern– Barcelona dataset indicated the effectiveness of using hybrid EMD-VMD method and RNN, that the proposed model achieve better classification performance reached 100% of accuracy. Hence, by comparison with other studies in the literature review, ECoG recordings provide best localization of IOZ by using this system. Finally, this developed method shows accurate results to help clinical experts in seizure resection, and indicates localization of IOZ which can be removed from brain area.
Finite element analysis of the behaviour of double-row bolted fin-plate connections
Authors: Bahaz Abdesselam , Bachiri Attia , Amara Salah
Published: December 2024

Fin-plate connections are among the most prevalent shear connections in the United States and Australia due to their simplicity in manufacturing and erection. Eurocode 3 Part 1-8 (Eurocode 3, 2005) classifies fin-plates as connection components that can transmit significant moments despite being classified as pinned connections. This study aims to investigate fin-plate connections with double rows of bolts and their effect on joint behaviour and strength, including the effect of plate thickness on the Torsional Moment-Angle of Twist and Moment-Rotation relationship. The results were analysed to determine the influence of these factors on behaviour and joint strength, and they were utilized to assess the efficacy of the Eurocode 3 Part 1-8 design approach. To fulfil the study's objective, finite element models were developed using the finite element analysis software Abaqus. The modelling considers material and geometric non-linearity to evaluate the overall behaviour of the connection and the individual components involved in this type of connection. The results were compared with those obtained from experimental testing to validate the finite element models.
Enhanced model predictive control using artificial neural networks for grid-connected two-level inverters
Authors: Chouaib Labiod , Redha Meneceur , Lamine Medekhel , Kamel Srairi
Published: December 2024

Integrating artificial intelligence (AI) to improve the performance of photovoltaic systems is compelling for two main reasons. First, AI technologies are making significant progress and are widely applied across various fields, such as medicine and agriculture. Second, the world is experiencing an increasing demand for energy while simultaneously facing the challenge of reducing reliance on traditional energy sources that exacerbate carbon emissions and climate change. This emphasizes the critical importance of transitioning to sustainable and clean energy solutions. In this context, photovoltaic panels have emerged as one of the most promising and widely adopted renewable energy sources. As the global reliance on solar energy grows, enhancing the efficiency and reliability of solar energy systems has become imperative. However, this transition is accompanied by significant challenges, particularly in integrating these systems with existing power grids. The complexities involved in achieving seamless integration, maintaining consistent performance, and preventing system failures necessitate the adoption of advanced technologies. These challenges are further exacerbated by the need to manage fluctuations in energy production, optimize energy storage, and ensure the long-term sustainability of solar power. This paper presents a novel approach for controlling ANN-MPC solar inverters, leveraging artificial neural networks (ANN) to address the challenges related to the efficiency of photovoltaic systems and their integration with the grid, ultimately reducing dependence on conventional energy sources. Initially, the ANN-based model is trained using large datasets derived from the system inputs and outputs, taking into account all critical operating conditions, such as sudden changes in current. Following the training process, the model acquires extensive data, enabling it to adapt to all transient conditions the system may encounter. The model continuously evolves to improve the efficiency of grid-connected photovoltaic systems. Additionally, experimental validation and performance testing of the proposed model are conducted to verify the effectiveness and flexibility of the ANN-based approach. The experimental results confirm the proposed approach's ability to enhance the performance of grid-connected electrical systems, reduce computational costs, and achieve model-free control.
Assessment of benthic macroinvertebrates diversity and streams quality in the Northern Sahara, Algeria
Authors: Ghougali Fayssal , Ghazi Cherif , Meroufel Bahia
Published: December 2024

This study aims to assess the ecological health of Aquatic ecosystems located in the Saharan bioclimatic zone of northern Sahara in Algeria, through a multiparametric approach based on the ecology of benthic macroinvertebrates. Between 2015 and 2017, we investigated five aquatic ecosystems (Wadi Z’mor, Wadi Ithel, Wadi Djedi, Lake Ayata, and Lake Megarine) to evaluate the biodiversity of benthic macroinvertebrates in relation to various environmental factors. These factors include 12 physicochemical water parameters, general habitat characteristics, and the degree of anthropogenic pressure. Benthic macroinvertebrates were collected from various habitat compartments (substrates) during the same period between August 2015 and November 2017. W. Z'mor displayed the greatest substrate diversity, predominantly consisting of pebbles, boulders, sand, solid supports, and vegetation, while the other sites were mostly dominated by sand. The pH levels at the study sites ranged from slightly alkaline to alkaline. Turbidity and suspended solids concentrations were significantly higher in W. Djedi and W. Z'mor, while the average BOD5 across all the studied hydrosystems suggested moderate pollution levels, with W. Djedi, W. Ithel, and L. Megarine showing the highest pollution. Regarding salinity, W. Djedi's waters were slightly brackish, while the other sites ranged from brackish to very brackish. The fauna recorded consisted of 995 individuals, representing 55 genera/taxa across 8 orders and 29 families. The most diverse groups were Coleoptera (24 taxa), Diptera (14 taxa), and Hemiptera (10 taxa), with Diptera and Coleoptera being the most abundant. W. Z'mor and W. Ithel exhibited the highest biodiversity (total richness: 35 taxa; Shannon index > 2.50). The IBGN calculation showed that the hydrobiological quality of the water was poor in W. Djedi, W. Ithel, L. Megarine, and L. Ayata (IBGN 5), while W. Z'mor had average water quality (IBGN 9).
Quantum tunneling of fermions from kerr-like black holes within topologically massive gravity
Authors: Bouhallouf Habiba , Bounekdja Billel
Published: December 2024

In the framework of 3-D general relativity, this study explores a Kerr-like black hole solution with a focus on its causal structure and particle dynamics, employing Penrose diagrams to elucidate the spacetime geometry. The research investigates the behavior pf particles in the vicinity of the event horizon, analyzing their trajectories and potential fates, including the influence of the black hole’s rotation and gravitational effects. The Dirac equation is solved in this curved spacetime using “WKB approximation”, allowing the computation of the Hawking temperature and unveiling quantum effects associated with black hole geometries in three dimensions. Moreover, the phenomenon of superradiance is explored, highlighting the mechanisms through with the rotational energy and angular momentum of the black hole are extracted. This phenomenon provides deeper insights into energy transfer processes and the stability of such black hole solutions. The research contributes to a better understanding of black hole thermodynamics, particularly in lower-dimensional gravitational settings, and offers a comprehensive analysis of energy exchange processes. By integrating classical and quantum perspectives, this study enhances the comprehension of particle dynamics, quantum field behavior, and thermodynamic properties of black holes, enriching the broader field of lower-dimensional gravitational models and their implications for fundamental physics.
A musicoterapia na prática fisioterapêutica em idosos com Alzheimer
Authors: Guimaraes Amanda Iasmim Bentes Bemuyai , Oliveira Hevelem Kamila Brito de , Silva Ingrid Nascimento da , Nascimento Julyana Leite , Silva Rebeca Brito da , Queiroz Wesdensbergton Weslley Monteiro
Published: December 2024

O idoso, segundo a literatura científica é definida a partir de várias perspectivas, incluindo critérios etários, características  biológicas e mudanças na saúde. A fisioterapia sendo a ciência da saúde que estuda, previne e trata os distúrbios cinéticos funcionais intercorrentes em órgãos e sistema do corpo humano, reabilitação e promoção da função física e do bem-estar através de métodos terapêuticos e técnicas específicas, gerados por alterações genéticas, por traumas e por doenças adquiridas. Tendo o uso da musicoterapia como forma de auxilio no tratamento para alcançar suas metas e munido dessas condutas fazem parte da equipe multidisciplinar para conduzir, através do movimento, as práticas empregadas nas literaturas e no hall do conhecimento científico, que pode oferecer benefícios significativos na gestão dos sintomas da doença e na melhoria da qualidade de vida. Objetivo: Demontrar o papel da fisioterpia ultilizando a musicoterapia em idosos com Alzheimer, auxiliando na melhoria da qualidade de vida dos pacientes,facilitando a mobilidade e promovendo o bem-estar emocional. Metodologia: No estudo foram encontrado 36 artigos no primeiro momento, ultilizado os critérios de inclusão foram selecionados 17 artigos, dentre esses após sua leitura na integra foram inseridos 12 artigos como base para o desenvolvimento. Conclusão: Existem os tratamentos farmacológicos, visam aliviar os sintomas da doença, melhorar a função cognitiva e em, alguns casos, único método de tratamento, contribuindo com a terapia ocupacional e suporte emocional. A fisioterapia é ampla, prevenindo e tratando distúrbios cinéticos funcionais, ultilizando de recursos da musicoterapia para o tratamento de diferentes patologias, públicos e origem álgica de cunho nociceptivo e neuroplástico. Além, também de ser um artificio de grande valia ao tratamento indireto de questões biopsicossocias. Em suma é notável a escassez de artigos e estudos científicos que investigam a combinação de fisioterapia e musicoterpia como uma possibilidade significativa no tratamento terapêutico. Apesar das evidências anedóticas e os resultados de algumas pesquisas iniciais indicam benefícios significativos, como melhoria da mobilidade, redução da dor e estimulação cognitiva, mais ainda é necessario mais estudos rigorosos.
Prevalence and epidemiology of gastro-intestinal parasitic infections in the mitidja plain (Algeria)
Authors: Samira Zamiche
Published: December 2024

Gastrointestinal parasitosis is a major public health issue worldwide, affecting millions of people, particularly in areas where socio-economic and environmental conditions are precarious. In Algeria, the agricultural region of the Mitidja Plain is particularly vulnerable to gastrointestinal pathologies due to favorable climatic and socio-economic factors. This study aims to analyze the epidemiology of gastrointestinal parasitoses within the Mitidja population through a retrospective analysis of medical records from patients presenting digestive disorders at various hospitals in the region between January 2018 and December 2023. The analysis revealed a significant prevalence of intestinal parasitoses, with nearly half of the subjects infested by at least one parasite, pathogenic or not. Thirteen parasitic species were identified, including 10 protozoa and 3 helminths, with protozoa predominating at 77 % of cases. The most frequently encountered species were Blastocystis hominis (27.5 %), Endolimax nana (21%), and Entamoeba histolytica (13%). The helminths identified included Enterobius vermicularis and, Taenia solium, with a prevalence of 1.55% and 1% respectively. The preliminary results underscore the need for further analysis by enhancing sampling processes and extending the study period. Additionally, implementing preventive measures such as educating the population about fecal hygiene, ensuring proper sanitation facilities, and treating water and food intended for consumption is crucial for effectively combating these fecal-transmitted parasites.
Exploring pulse transit time as a potential indicator of blood pressure: a scientific inquiry
Authors: Omari Tahar , Benali Radhwane , Dib Nabil , Behadada Omar
Published: December 2024

Non-invasive continuous blood pressure (BP) monitoring is crucial, especially in critical care settings. While pulse transit time (PTT) has been used for cuffless BP monitoring, it requires accurate detection of pulse waves at arterial sites, which can be uncomfortable for patients. Pulse arrival time (PAT), the interval between the ECG Q-wave and pulse arrival at a distant site, offers a potentially less invasive approach for BP estimation. However, the reliability of PAT as a BP indicator remains uncertain. This study aimed to evaluate the feasibility of using PAT as a continuous, non-invasive BP monitoring method. Data from 37 subjects, including PAT and BP measurements, were analyzed. Statistical analysis revealed a weak correlation (r = 0.17) between PAT and BP, suggesting that PAT may not be a reliable standalone method for BP measurement. These findings indicate that further research is necessary to address the limitations of PAT and explore its potential as a supplementary tool for BP monitoring in clinical settings.
Cosmovisão xerente: práticas rituais e a relação com o sagrado em um contexto contemporâneo
Authors: Santana Leonardo Sampaio Baleeiro , Osório Neila Barbosa , Jesus Djanires Lageano Neto de , Brito Marlon Santos de Oliveira , Oliveira Nubia Pereira Brito , Oliveira Katia Juliane Lopes de , Gândara Luciana Pegoraro Penteado , Maia Giselle Carmo , Souza Marileide Carvalho de , Sá Francijanes Alves de Sousa
Published: December 2024

Este estudo explora a relação entre as práticas sagradas e a identidade do povo Xerente, destacando como suas tradições espirituais continuam a exercer um papel essencial na vida da comunidade, mesmo diante das transformações contemporâneas. A introdução contextualiza a importância dessas práticas, não apenas como rituais religiosos, mas como pilares que sustentam uma cosmovisão que interliga o cotidiano e o sagrado. O objetivo central foi compreender de que maneira o povo Xerente mantém suas práticas espirituais e a relação com o divino, apesar dos desafios modernos, investigando como esses rituais fortalecem sua identidade cultural e espiritual. O problema enfrentado reside na tensão entre a preservação das tradições ancestrais e as pressões externas, como a modernização e a perda de território, que ameaçam o modo de vida tradicional dos Xerente. A justificativa do estudo se apoia na necessidade de valorizar e documentar essas práticas rituais, considerando que são formas de resistência cultural e espiritual, que garantem a sobrevivência e a coesão da comunidade. Para atingir esses objetivos, foi adotada uma metodologia qualitativa e bibliográfica, baseada em uma análise profunda da literatura existente sobre as cosmologias indígenas, com foco específico no povo Xerente. Os resultados indicaram que, longe de serem práticas ameaçadas, os rituais Xerente são fluidos e adaptáveis, preservando a essência espiritual enquanto dialogam com as novas realidades. A juventude desempenha um papel importante nesse processo, mostrando-se engajada na continuidade das tradições, ao mesmo tempo em que encontra formas de ressignificá-las. O estudo conclui que as práticas sagradas não são apenas expressões de fé, mas também ferramentas poderosas de resistência e adaptação, fortalecendo a coesão social e a identidade Xerente em um mundo em constante mudança.
AlfabTEA: integrando a gamificação no processo de alfabetização de crianças com Transtorno do Espectro Autista utilizando o Método TEACCH e o Programa ABA
Authors: Frazão Mariane Rafaela Coelho , Nascimento Vitoria Sousa Santos , Santos Estêvão Damasceno
Published: December 2024

A Organização Mundial da Saúde estima que cerca de 1 em cada 160 crianças no mundo têm autismo.  Lorna Wing e Judith Gould identificaram que pessoas autistas carecem de capacidade imaginativa, têm dificuldades na comunicação verbal e não-verbal e na interação social, dessa forma a alfabetização de crianças diagnosticadas com Transtorno do Espectro Autista (TEA) é um desafio significativo para os educadores. Nesse contexto, o uso do método TEACCH e do programa ABA tem se mostrado como instrumentos eficientes na educação de crianças com TEA. Essas informações motivaram a criação do AlfabTEA, amparado por estudos que comprovam a eficácia do uso da gamificação em ambientes educativos. O objetivo do presente estudo é integrar a gamificação na alfabetização de crianças com transtorno do espectro autista aplicando as metodologias TEACCH e o ABA. O AlfabTEA possui 4 níveis que trabalham o aprendizado das letras, sílabas, palavras e frases. O jogo foi feito utilizando os core-drivers da gamificação desenvolvidos por Yu Kai Chou, e as diretrizes de jogo definidas por Huizinga. Espera-se que essa solução ajude a melhorar direta ou indiretamente a qualidade do ensino das pessoas que a utilizarem.
Peran Dewan Pengawas Syariah dalam Menjamin Kualitas Produk pada Bank Syariah Indonesia (BSI)
Authors: Alvera Zahvania Putri  , Defa Irfantara Pramudya  , Binti Nur Asiyah
Published: December 2024

Islamic banking in Indonesia, led by Bank Syariah Indonesia (BSI), is experiencing rapid growth, but still faces challenges in product quality and compliance with sharia principles. This article discusses the important role of the Sharia Supervisory Board (DPS) in ensuring that banking products comply with sharia principles, including the supervision of the application of fatwas to ensure that products are free from maysir, gharar, and riba. Through qualitative research based on literature study, DPS is proven to have a strategic role in product and service supervision. However, obstacles such as limited independence and lack of product innovation are the main challenges that need to be overcome. Strengthening the role of DPS and providing adequate regulatory support are important steps to improve the quality of BSI products and services. With these efforts, BSIs are expected to be able to maintain sharia principles as the core of operations, while increasing public confidence in the Islamic banking industry. It also has the potential to support the sustainable growth of the Islamic banking sector in Indonesia, making it more competitive and relevant to the needs of the modern market.
An Analysis of The Causes and Impacts of Corporate Mergers in The Logistics Industry: A Case Study of JD Logistics' Acquisition of Deppon Express
Authors: Xie Jiani
Published: December 2024

This article deeply analyzes the reasons and effects of mergers and acquisitions of enterprises in the logistics industry, and analyzes the mergers and acquisitions of Deppon Express by JD Logistics as a typical case. The article pointed out that in the context of globalization and digitalization, the logistics industry is undergoing profound changes, and the market competition is becoming increasingly fierce. As a leading enterprise in e-commerce logistics, JD Logistics aims to expand the market, enhance competitiveness, achieve resource integration and complementary advantages, and respond to market demand and policy support through the acquisition of Deppon Express. After the merger and acquisition, JD Logistics has significantly improved its logistics network coverage, supply chain service capacity, economic benefits, etc., while Deppon Express has significantly improved its corporate governance, business integration and service efficiency. This merger and acquisition not only enhances the strength of JD Logistics in the large logistics market, but also promotes the concentration of resources and the improvement of service quality in the logistics industry. At the same time, mergers and acquisitions also promote the development of green logistics and show the trend of the logistics industry to sustainable development. Through the case study of the merger and acquisition of Deppon Express by JD Logistics, this article provides valuable experience for the merger and acquisition of enterprises in the logistics industry, and looks forward to the steady development of the logistics industry in the future in resource integration and competitive cooperation.
Overview of NGO Strategies and Practices in Addressing Global Challenges
Authors: Wang Yicheng
Published: December 2024

Against the backdrop of growing global challenges, non-governmental organisations (NGOs) are emerging and playing an important role. This paper examines in depth the strategies and practices of NGOs in addressing global challenges. Firstly, the background of the rise of NGOs and the purpose of the study are explained, followed by an analysis of the concept and characteristics of NGOs, including definition, main features and types. It then discusses the strategies of NGOs in addressing global challenges, such as the use of information tools and the implementation of cooperation strategies. The practice of NGOs in global ocean governance and global environmental governance is then described. The roles and challenges of NGOs are also analysed, including their involvement in public crises and their position in global crisis governance, while internal and external challenges faced by NGOs are identified. Finally, the conclusions of the study are summarised and an outlook is given on future research directions, including strengthening the capacity building of NGOs, expanding areas of cooperation, deepening policy influence and exploring innovative development.
Research on Guided Performance Evaluation System Based on Dynamic Information Update and Iterative Feedback
Authors: Tian Chenxu , Li Yuxuan , Ren Shenboya
Published: December 2024

In the field of higher education, traditional performance evaluation systems often neglect the consideration of individual student differences and the provision of dynamic feedback, resulting in evaluation results that do not fully reflect the development potential and actual performance of students. This paper proposes an innovative guided performance evaluation mechanism that incorporates two core algorithms: online information updating and secondary assessment feedback. The former ensures the timeliness and accuracy of the evaluation results through real-time monitoring and updating of students' learning status, while the latter realizes the expansion of the evaluation subject and the improvement of the feedback mechanism through the interaction between tutors and students. Then, this paper adopts the hierarchical analysis method and the fuzzy comprehensive evaluation method to conduct empirical research, and the results show that the proposed guided performance evaluation mechanism can effectively improve students' satisfaction with the performance evaluation system and promote the enhancement of their independent learning ability.
The Impact of Childhood Neglect on College Students' Self-focused Attention
Authors: Kong Xiangna , Yang Yueying , Wang Jiayi
Published: December 2024

Purpose: This study aims to explore the impact of childhood neglect on college students' self-focused attention, so as to deeply understand the psychological development characteristics of college students and provide a theoretical basis for preventing and intervening in college students' self-focused attention. Methods: A random sample survey of 307 college students was conducted using the Childhood Neglect Scale (CNS) and the Self-focused Attention Scale (SFAS). Results: There was a significant negative correlation between childhood neglect and the self-focused attention of college students. The higher the degree of childhood neglect, the lower the self-focused attention of college students. Childhood neglect has a significant predictive effect on self-focused attention of college students. Conclusion: Childhood neglect has a negative impact on college students' self-focused attention.