JFAS_Vol 16 N 01
Permanent URI for this collectionhttps://dspace.univ-eloued.dz/handle/123456789/34941
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Item ANALYZING THE IMPACT OF DIGITAL TECHNOLOGIES ON ENHANCING SUPPLY CHAIN RESILIENCE IN THE POST-PANDEMIC ERA(university of eloued جامعة الوادي, 2024-01-16) Prince Kumar1*, Shahid Aziz2 and Anwar Baz Khan3The COVID-19 pandemic brought to light the vulnerabilities and disruptions within global supply chains, necessitating a comprehensive reevaluation of supply chain resilience strategies. In response, organizations across industries have increasingly turned to digital technologies, such as block chain, the Internet of Things (IoT), artificial intelligence (AI), and data analytics, to fortify their supply chains and ensure business continuity. The research methodology employs quantitative data collection techniques, utilizing surveys and questionnaires administered to supply chain professionals and managers. The stratified sampling method is applied to ensure representative participant selection. The subsequent data analysis is conducted using PLS (Partial Least Squares) Smart 4 to derive meaningful results. The findings reveal that digital technologies, encompassing, IoT, artificial intelligence, and data analytics, significantly contribute to enhancing supply chain resilience in the post-pandemic era.Item NUMERICAL STUDY OF THIN FILM OXIDE EFFECT WITH MULTIPHYSICS COUPLING ON ELECTRICAL CONTACT PARAMETERS UNDER LOW FORCE(university of eloued جامعة الوادي, 2024) Hans Essone Obame*, Honoré Gnanga, Arsène Eya’a MvongboteElectrical contacts consist of parts where the surfaces in contact can carry electrical current just in a few contact asperity points scattered over the entire apparent contact area. Contamination and oxidation are inevitable on contact surfaces, especially for small contact under low force (mN). This oxidation phenomenon is accelerating by harsh environments (high temperature and high relative humidity RH), making then a thin film oxide on the interface. According to oxide thickness, the electrical resistance will varies allowing then a contact dysfunction. A finite element model has been used to study the multiphysics of thermo electromechanical phenomena and to analyze different cases and various physical parameters. The influence of contact structure on contact resistance was analyzed and the constriction resistance was extracted from measured resistance using a sample numerical simulation.Item EFFECT HIGH EXPLOSIVE TYPE ON THE PERFORMANCE OF SHAPED CHARGE USED IN OIL INDUSTRY(university of eloued جامعة الوادي, 2024-01-05) Ahmed Hawass*, Tamer ElshenawySeveral explosives have been tested numerically to study their effect and performance of the produced jet characteristics and predicted jet penetration into concrete target material. TNT, cyclotol, RDX, HMX, PETN and LX-17 have been used in this research as a shaped charge oil well perforator, where the Autodyn hydrocode has been implemented with the jetting analysis solver and jet penetration to estimate both the jetting output data and the relevant penetration depth for these studied explosives. Results show that HMX explosive exhibiting the highest detonation velocity, has the largest penetration depth into Concrete 26MPa target. The relative jet tip velocity to the Gurney characteristic velocity of an explosive has been found to be around 2.5 for the used explosive charges, whereas the scaled jet tip velocity to the detonation velocity of an explosive has been found to be one for the studied six explosives.