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RISS 인기검색어
- 검색키워드
- 저자 : ( Byoungkwan Cho ) (검색결과 3 건)
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( Collins Wakholi ),( Byoungkwan Cho ),( Changyeun Mo ),( Moon S. Kim ) 한국농업기계학회 2015 바이오시스템공학 Vol.40 No.3
Purpose: Fruit and vegetable production is a fast-growing sector in East Africa, and it bears considerable local and international market potential. In an effort to analyze the challenges within this sector and suggest possible solutions, this study reviews the postharvest handling technologies commonly used with fruits and vegetables in East Africa. Methods: During the course of this study, small-scale farmers were identified as the most prominent producers of fruit and vegetable crops in the region. Results: We found that many of these small-scale farmers employed relative simple and inexpensive techniques in handling their limited volumes of produce. Several factors could be addressed to reduce postharvest losses, including weak policies, inferior infrastructure, and poor market strategies. However, the lack of basic knowledge (including demographic, scientific, and economic knowledge) among the stakeholders (e.g., researchers, farmers, governments, nongovernment organizations, and merchants) on how to develop, implement, use, and sustain the recommended handling technologies is probably the most problematic. Conclusions: We recommend that high priority be placed on closing the knowledge gap, which could enhance the efforts of all the stakeholders to address and reduce postharvest losses.
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( Ashabahebwa Ambrose ),( Wanghee Lee ),( Byoungkwan Cho ) 한국농업기계학회 2015 바이오시스템공학 Vol.40 No.3
Purpose: Corn is a major commercial crop targeted for genetic modification owing to its high consumer demand as a foodstuff for humans and livestock, as well as its other industrial applications. However, the safety of genetically modified (GM) crops is controversial. Indeed, several countries have banned the importation of GM seeds that can germinate. Therefore, development of effective, convenient, and nondestructive methods to inhibit seed germination is required. Methods: This study aimed to examine the efficacy of microwave heat treatment for inhibition of germination of corn kernels and for optimization of power and exposure time required for effective aging treatment. Artificial inhibition was induced in corn kernels using microwave heat treatment. Seven power levels were examined (400, 500, 600, 700, 800, 900, and 1000 W) at each of the four exposure times (0.5, 1.0, 1.5, and 2.0 min). Results: Corn kernels could be aged effectively after heating for 0.5~1.0 min at powers greater than 800 W, with increasing efficacy observed at higher powers. Further analysis showed that the most effective inhibition of germination was observed at 1000 W for 40 s. This setting did not cause any physical damage to the corn kernels. Conclusions: Optimal inhibition of corn kernel germination was achieved using higher power for shorter times, which may be useful for industrial corn seed treatment.
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자동차 도장 시스템의 트라이볼로지적 특성에 관한 불량 사례 연구
이일권(Ilkwon Lee),김청균(Chungkyun Kim),김도현(Dohyun Kim),이병관(Byoungkwan Lee),김한구(Hangoo Kim),조승현(Seunghyun Cho),국창호(Changho Kook),유창배(Changbae Yoo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In recent, the automotive makers have produced the vehicles of many colours that chose by many people. But, if the beautiful painting parts on vehicle appear the variation of paint film by inferiority of paint and chemical effecting, they will be taken the bad influence because of a falling- off in quality. In this paper, the several examples produced in the field identified the fact that give large effect for paint system. The viscosity of coating material affect with paint film formation. When the paint part doesn't make uniform paint film because of lowering viscosity, it made identified inferiority phenomenon by running of paint. The adhesive property of paint surface is affected with roughness. It become so rough that well absorb the coating material. As a result, the researcher certified the phenomenon of orange peel that is collected with certain parts by paint film clod. When the researcher is adhered an alien substance adhesive with paint part during driving in the local where a pollutant contain in air, he identified the inferiority example of paint film because of chemical changing. When the driver keep his car for long time in a garage where is cut the air flowing, he certified the blistering phenomenon of paint film.
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