Ain Shams Engineering Journal最新文献

{"title":"Heat transfer analysis in hybrid nano-composite flow in a stretchable convergent/divergent channel in the preaence of Darcy-Forchheimer law and Lorentz force","authors":"","doi":"10.1016/j.asej.2024.102828","DOIUrl":"10.1016/j.asej.2024.102828","url":null,"abstract":"<div><p>The hybrid nano-composite fluid transportation in Jaffery-Hemal flow (JHF) has important uses in various technologies, like converging dies, hydrology, automobiles, etc. Such significant applications motivated us to work on the current problem. Therefore, the purpose of the current work is to inspect the energy efficiency analysis of hybrid nanofluids via convergent/divergent channels using porous space. The hybrid nanofluid consists of polyethylene glycol water, nanoparticles <span><math><mrow><mi>Zr</mi><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> and <span><math><mrow><mi>MgO</mi></mrow></math></span>. To understand the porosity features, the Darcy-Forchheimer law is used. Solar radiation is considered for a more comprehensive analysis of the thermal field. The strong ODEs are obtained using a suitable similarity transformation. The NDSolve technique is used to simulate numerical results, which are then compared with previous published results. Plots and tables are used to report physical investigations of the related parameters. For higher solid volume fractions, the divergent channel’s velocity drops. Whereas it increases for a convergent channel. In the presence of variables, Eckert number, and porosity parameter, skin friction increases in divergent channels and decreases in convergent channels for both nanofluids and hybrid nanofluids. Furthermore, it is noticed that hybrid nanocomposite has more dominant features than nanocomposite for both scenarios of narrowing/expanding channels.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S209044792400203X/pdfft?md5=bcaac6062c98377023cc7084a32b9b8f&pid=1-s2.0-S209044792400203X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141053766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing visual clarity in rainy conditions based on single-frame filtering algorithm","authors":"","doi":"10.1016/j.asej.2024.102846","DOIUrl":"10.1016/j.asej.2024.102846","url":null,"abstract":"<div><p>Vision-based driving assistance systems has made a paradigm shift in the automotive industry, especially in auto electronics, towards vehicular technology in smart cities. This technology concentrates on safeguarding the members inside and outside the car, such as pedestrians or other vehicles on the road. This paper proposes a methodology that employs a single image/frame-based rain filter for video processing. In this paper, an innovative method of frame filtering is statistically modelled to provide a clear vision on the road during rainy weather. The frame filtering displays an improvement by considering a reference frame as the input frame and it is further exploited to confiscate the contextual and atmospheric particles using the method of frame difference. Moreover, this article suggests a hybrid algorithm that accomplishes filtering utilizing L0-gradient image smoothing and weights least square smoothing along with adaptive histogram equalization to preserve and enhance the image under intense rainy conditions. With a single frame-based filtering methodology, the proposed algorithm performs well with rainy images but loses information during video processing. The proposed method displays an improvement by 36.29 % and 3.48 % in Structural Similarity Index (SSIM) and 57.15 % and 14.47 % in Gradient Magnitude Similarity Deviation (GMSD) as compared to guided filter and bilateral filter methods.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002211/pdfft?md5=110820b2d487c987e1ed3b7f879294c1&pid=1-s2.0-S2090447924002211-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141038564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single server queuing model of Markov modulated bursty arrival with service following phase type distributions for underlay and overlay customers","authors":"","doi":"10.1016/j.asej.2024.102825","DOIUrl":"10.1016/j.asej.2024.102825","url":null,"abstract":"<div><p>Among the waiting models proposed in the literature most of them focus on homogeneous arrival rate. This paper proposes a single server waiting line with modulated arrival rate of small and large size of traffic sources. Modulation of arrival rate induces the server to shift the service rate that follow phase type distribution. Using Neut’s versatile point process under quasi birth death environment we present the steady state analysis of the system. We provide examples numerically to perform the results and represent it in graphical form.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002004/pdfft?md5=b973692877008f09adb697fb4cdeed72&pid=1-s2.0-S2090447924002004-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141055905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Embedding sugarcane bagasse (SCB) in clay bricks used in building envelop to reduce the electricity consumption","authors":"","doi":"10.1016/j.asej.2024.102840","DOIUrl":"10.1016/j.asej.2024.102840","url":null,"abstract":"<div><p>Climate change is predicted to provide several issues for the built environment, including an increased need for cooling buildings in the summer season. Controlling the heating and cooling loads in indoor spaces and creating energy-efficient buildings in hot regions is the scope of this research. Previous studies tackled the significance of eco-friendly materials and their role in energy efficiency and carbon reduction. This research intends to examine the efficiency of embedding sugarcane bagasse in exterior walls as thermal insulation to reduce electricity consumption in hot regions such as Egypt, without compromising the physical and chemical properties of the walls. Since clay bricks are widely used to cover the exterior building envelope in Egypt this research designed a new clay brick that embeds sugarcane bagasse to minimize the exterior heat gain and reduce electricity consumption. The research used experimental methods to test and compare the physical and chemical properties of the clay brick after embedding sugarcane bagasse (SCB). In addition, a simulation analysis using “TRNSYS” software was made to measure the efficiency of the clay bricks with sugarcane bagasse (SCB) in reducing electricity consumption to cool indoor spaces. The study revealed that the new insulated clay brick would preserve the mechanical properties of the regular clay brick; furthermore, it could reduce 19.5% of the cooling loads consumed in buildings located in hot, arid regions. The proposed insulated clay bricks with SCB are a viable solution for well-insulated buildings towards a sustainable environment in hot, arid regions.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002156/pdfft?md5=2f7a710c6a94275c3e84ff61b3de48d8&pid=1-s2.0-S2090447924002156-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141055158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hall and ion-slip current efficacy on thermal performance of magnetic power-law hybrid nanofluid using modified Fourier’s law","authors":"","doi":"10.1016/j.asej.2024.102838","DOIUrl":"10.1016/j.asej.2024.102838","url":null,"abstract":"<div><p>Magnetohydrodynamic free convection liquid considering Hall along with ion-slip current has many engineering usages. In addition, boundary layer flow of power-law fluids due to a stretching plane possesses sundry applications in biological sciences, geophysics, and petroleum industries. Further, hybrid nanofluids are important due to their high heat transfer capability. In view of such relevance, the goal of this investigation is to analyze Hall along with ion-slip effects on thermo-fluidic flow of magnetic power-law hybrid nanofluid so as to accomplish effective cooling in the desired thermal systems. Present investigation’s novelty is adding hybrid nanostructure to power-law fluid flow influenced by Hall and ion-slip mechanism and implementation of modified Fourier’s law featured with velocity and temperature gradients. The key results are that fluid velocity amplifies with rise in ion-slip and Hall parameters. Modified Prandtl numbers and Hall parameter ameliorate heat transfer rate while ion-slip parameter diminishes it.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002132/pdfft?md5=21fe6b3ecd7dc32bedb2dffecb058597&pid=1-s2.0-S2090447924002132-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141039858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bibliometric analysis of the literature on risk management in the construction sector: Exploring current and future trends","authors":"","doi":"10.1016/j.asej.2024.102843","DOIUrl":"10.1016/j.asej.2024.102843","url":null,"abstract":"<div><p>The literature's current state of the art and future research directions for risk management in the construction sector are described and analyzed in this paper. Web of Science and VOSviewer-Based Literature: A Bibliometric and Visualization Tool. A web of science core collection of 676 research publications on risk management and the construction sector written between 2000 and 2021 was examined. The work investigates cluster analysis, co-occurrences analysis of authors' keywords, and mapping of bibliographic coupling. Results show the contribution of 61 authors from 80 countries, 45 institutions, and 20 keywords were identified and organized in three clusters: Risk management in construction project management, Enterprise risk management in the construction sector, and Effective project management for the construction project success.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002181/pdfft?md5=d334b2db36aebd16bfd53ad8f8ab0afa&pid=1-s2.0-S2090447924002181-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141042617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental evaluation of the significance of scheduled turbocharger reconditioning on marine diesel engine efficiency and exhaust gas emissions","authors":"","doi":"10.1016/j.asej.2024.102845","DOIUrl":"10.1016/j.asej.2024.102845","url":null,"abstract":"<div><p>Poor clearances, misalignments, and carbon deposits in a turbocharger due to high running hours can decrease engine efficiency. This study analyzes the effects of turbocharger reconditioning on the performance and emissions formation of a marine diesel generator engine. The engine test experiments were performed on a university training ship's auxiliary diesel engine with 4309 running hours before and after the TC overhaul. As a result, cylinder peak pressure was increased by a maximum of 3.57 % while fuel saving of 5–8 g/kWh was realized. Lower exhaust gas temperatures and improved charge air pressure by up to 7.7 % were recorded. A significant CO emission reduction of 21.6 % was recorded at idle load whereas NOx and CO₂ emissions were reduced to a maximum of 4.86 % and 7.30 % at 50 % engine load. The results indicate that scheduled TC overhaul and maintenance are very useful to improve the engine’s fuel economy, and performance and reduce exhaust emissions.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S209044792400220X/pdfft?md5=00ef1bc4f9052e196b8640eb60102fcd&pid=1-s2.0-S209044792400220X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141047118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adapting reservoir operations for optimal water management under varying climate and demand scenarios using metaheuristic algorithms","authors":"","doi":"10.1016/j.asej.2024.102835","DOIUrl":"10.1016/j.asej.2024.102835","url":null,"abstract":"<div><p>The operational rule curve is significant for proper reservoir operations and water resources management of the dam. The optimisation of the release policy is rather a complicated and stochastic problem. Various types of algorithms have been used to develop the release policy for the Klang Gate Dam (KGD), but alas, climate parameters associated with climate change, be it regional or globally, e.g., temperature factors, had not been considered then. In this study, the consideration of maximum and minimum temperature factors is given emphasis, while water demand is evaluated in the optimisation problem using simulation-optimisation approaches. The support vector regression simulation model (SVRS), and the multilayer perceptron simulation model (MLPS) were used to simulate the demand for the scenario cases. SVRS utilises the hyperplane theory to study the relationship between the input and output data, whereas MLPS employs the human neural system to weight and process the inputs via multiple layers of neurons into a targeted output. Four distinct types of simulation-optimisation combination model, including the SVRS-firefly algorithm (SVRS-FA), the SVRS-particle swarm optimisation (SVRS-PSO), the MLPS-firefly algorithm (MLPS-FA), and the MLPS-particle swarm optimisation (MLPS-PSO), were applied and investigated. The ultimate goal of this study was to minimise the water deficit. The PSO optimisation models overall have outperformed the FA optimisation models in all aspects. The periodic reliability of the MLPS-PSO was found to be the highest when the minimum temperature scenario was considered, and is 0.6491, with the least shortage period of 80 months. The MLPS-PSO is also the most resilient model in the same scenario, with a resilience value of 0.6750. Whereas the SVRS-PSO was the least vulnerable model in the minimum temperature scenario with the lowest shortage index of 0.0047 and a volumetric deficiency of about 2.44 MCM in total. The SVRS-PSO model showed excellent performance for high and low inflow conditions, while the MLPS-PSO model was better during medium inflows. In short, each of the models investigated has its particular field of advancement, but since the maximum temperatures sounded critical, additional research for the maximum temperature case could be pursued further in depth.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002107/pdfft?md5=632470a8560f5d8b428af7eb8dc12d32&pid=1-s2.0-S2090447924002107-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141044938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Envisioning of smart cycling in seven cities: Discourse analysis of official city documents","authors":"","doi":"10.1016/j.asej.2024.102820","DOIUrl":"10.1016/j.asej.2024.102820","url":null,"abstract":"<div><p>This article investigates how and why smart cycling is implemented in cities. First, we develop a conceptual framework based on the literature that addresses sustainable transportation in cities,with a focus on cycling. Afterwards, we use this framework to explore how cycling is mentioned in the official discourse of cities by examining published official city documents using discourse analysis. Thus, we investigate the narratives published around smart cycling in seven cities: Helsinki, Montreal, Moscow, Tokyo, Dublin, Boston, and Vancouver. Conducting discourse analysis helps contextualize the implementation of smart cycling in cities, allowing us to grasp whether and how the narratives of smart cycling in the cities’ discourse are aligned towards a more technical or social recipe. This research shows that smart cycling narratives in cities emphasize both its social and technical aspects, reflecting the socio-technical aspects and nature of smart cycling and its discourse. This comprehensive understanding of smart cycling indicates that it can play different roles in different cities, based on a city’s goals and vision. Hence, smart cycling is a versatile tool for addressing urban challenges and building smarter, more sustainable cities, both technically and socially.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924001953/pdfft?md5=5e2be3d2f0e85970d5dad4065d9fcd9d&pid=1-s2.0-S2090447924001953-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141025810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing citizen satisfaction indicators for urban public services to enhance quality of life in Sharm el-Sheikh","authors":"","doi":"10.1016/j.asej.2024.102841","DOIUrl":"10.1016/j.asej.2024.102841","url":null,"abstract":"<div><p>The quality of urban life is a crucial area of urban studies, encompassing social, environmental, and economic aspects. Sharm el-Sheikh, a popular tourist destination in Egypt, faces challenges in balancing tourism development with citizen satisfaction with public services. This study aimed to assess citizen satisfaction with key urban services in Sharm el-Sheikh and identify areas for improvement. A survey was conducted by the South Sinai Urban Observatory, employing stratified sampling to ensure a representative sample across demographics. The survey utilized a combination of closed-ended questions with a five-point Likert scale and an open-ended question for additional feedback.</p><p>The analysis revealed that citizens expressed satisfaction with road and traffic services, government office services, the City Council, and security services. However, dissatisfaction was also identified in areas such as educational services, access to qualified doctors, the sanitation system, the availability of safe drinking water, and cultural services.</p><p>Based on these findings, the study recommends that decision-makers in Sharm el-Sheikh prioritize addressing these areas of lower satisfaction. Regularly conducting citizen satisfaction surveys and fostering trust between citizens and the government are crucial for ongoing improvement in urban and tourism services, ultimately enhancing the city's overall quality of life.</p></div>","PeriodicalId":48648,"journal":{"name":"Ain Shams Engineering Journal","volume":null,"pages":null},"PeriodicalIF":6.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2090447924002168/pdfft?md5=afc8b8a846835e4c6778f3ff6732e687&pid=1-s2.0-S2090447924002168-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141037035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}