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Assessing efficacy of standard impregnation techniques on die-cast aluminum alloys using X-ray micro-CT

China Foundry 2024年第3期21卷 276-286页

作者： ajith bandara Koichi Kan Katanaga Yusuke Natsuto Soga Akifumi Koike Toru Aoki Hamamatsu TSC Chuo Hatsumei Institute322 lida-choMinami-kuHamamatsu435-0028Japan Graduate School of Medical Photonics ShizuokaUniversityJohoku 3-5-1HamamatsuShizuoka432-8561Japan ANSeeN Inc Johoku 3-5-1HamamatsuShizuoka432-8561Japan Research Institute of Electronics ShizuokaUniversityJohoku 3-5-1HamamatsuShizuoka432-8561Japan

Utilizing lightweight Al alloys in various industrial applications requires achieving precise pressure tightness and leak *** pressure impregnation(VPI)with thermosetting polymers is commonly used to address leakage defects in die-cast Al *** this study,the efficacy of the VPI technique in sealing alloy parts was investigated using a combination of nondestructive micro X-ray computed tomography(micro XCT)and a standard leak *** results demonstrate that the commonly used water leak test is insufficient for determining the sealing ***,micro XCT shows distinct advantages by enabling more comprehensive *** reveals the presence of a low atomic number impregnates sealant within casting defects,which has low grey contrast and allows for visualizing primary leakage paths in *** effective atomic number of impregnated resin is 6.75 and that of Al alloy is 13.69 by dual-energy X-ray *** research findings will contribute to enhancing the standard VPI process parameters and the properties of impregnating sealants to improve quality assurance for impregnation in industrial metals.

关键词： nondestructive testing Al alloy die-casting vacuum pressure impregnation micro X-ray computed tomography duel-energy X-ray CT

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Expert elicitations of smallholder agroforestry practices in Seychelles:A SWOT-AHP analysis

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Regional Sustainability 2023年第3期4卷 282-295页

作者： Daniel ETONGO Uvicka BRISTOL Terence Epule EPULE ajith bandara Sandra SINON James Michel Blue Economy Research Institute University of SeychellesAnse Royale1348Seychelles Department of Environmental Sciences University of SeychellesAnse Royale1348Seychelles International Water Research Institute Mohammed VI University PolytechnicBen Guerir43150Morocco Agrifood research and development unit University of Quebec in Abitibi-Témiscamingue(UQAT)QuebecJ0Z 3B0Canada Department of Computing and Information Systems University of SeychellesAnse Royal1348Seychelles Department of Agriculture Ministry of AgricultureClimate Change and Environment(MACCE)Victoria445Seychelles

Agroforestry can leverage the co-benefits of climate change adaptation and mitigation while conserving biodiversity and restoring degraded and deforested *** preference of relevant stakeholders regarding agroforestry practices enhances sustainable land management through strategic decision-making in Seychelles and other island states.A suitable approach for assessing stakeholders'preferences of agroforestry is the implementation of the strengths,weaknesses,opportunities,and threats(SWOT)approach in combination with the analytic hierarchy process(AHP)*** entry point of this study is an extensive literature review process,during which 28 SWOT factors were *** SWOT factors were deliberated on during a half-day workshop with agricultural experts who agreed on 20 SWOT factors that reflect the local realities of the Seychelles through a consensus *** the SWOT-AHP approach,focus group discussions were conducted to examine the perceptions of researchers and extension workers about the adoption of agroforestry in *** results indicated that the positive aspects of smallholder agroforestry outweigh the negative *** example,increased agricultural production,control runoff and soil erosion receive the highest scores among the strength factors perceived by researchers and extension workers,*** willingness of international organizations to fund agroforestry-related projects and the existence of native tree species on farmlands have the highest scores among the opportunity *** lack of education,information,and communication between the government and farmers,and the small land size and crop competition have the highest scores among the weakness ***,change in government policies on land use has the highest score among the threat factors by researchers,whereas the most significant threat is climate change and variability for the extension *** provision for a 30-year land lease agreement in

关键词： Smallholder farmers Agroforestry Climate resilience Extension worker Strengths weaknesses opportunities and threats(SWOT) Analytic hierarchy process(AHP) Seychelles

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