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최훈,김정한 한국응용생명화학회 2018 Applied Biological Chemistry (Appl Biol Chem) Vol.61 No.1
The exposure pattern and potential risk of fenarimol emulsifiable concentrate to agricultural workers were investigated during the preparation of the pesticide suspension and the application of the prepared suspension to the cucumber in a greenhouse environment. The dermal exposure to fenarimol was 0.17 ± 0.11 mg (0.001 ± 0.001% of prepared active ingredient) for mixing/ loading and 0.22 ± 0.15 mg (0.003 ± 0.002% of applied active ingredient) for application, respectively. The most exposed part of body was the hand (100%) during mixing/loading, whereas the primary sites during application were the back and legs. In particular, 54.8% of dermal exposure occurred on the shins. The inhalation exposure to fenarimol was detected as 3.7 ± 1.0 lg for the applicator. In comparison with the exposure patterns to pesticides for agricultural workers in greenhouse reported in previous studies, lower dermal and inhalation exposures to fenarimol were observed during mixing/loading and application, respectively. The results of the risk assessment demonstrated that the possibility of risk to fenarimol exposure was lowest during mixing/loading and application in the greenhouse environment.
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최훈,이승현 한국정보전략학회 2001 한국정보전략학회지 Vol.4 No.2
These days agricultural cooperative needs to be ready to accept the quickly changing marketing environment. Because of the problems of collection and distribution channels, these problems cause high marketing costs, high wages and low efficiency of agricultural economic systems. In addition, unstable demands and supplies, and price depreciation cause burdens to farmers. Therefore, agricultural cooperative should set up the new framework so that farmers would be able to receive reasonable prices of products that they produce. Thus, constructing electronic commerce of the agricultural products is one of the encouraging areas to overcome these challenging agricultural distributional problems. In this respect, this paper focused on how agricultural cooperative sets up the EC. At first, researchers described the concept and EC and future direction of it. Besides, web sites related to agricultural products and web sites that are linked to agricultural cooperatives were compared and analyzed. In addition, what should be included in the contents was also mentioned. Also, electronic paying system, plan of advertising, and long-term plans of accomplishing goals were also pointed out. Researchers understand that agricultural cooperative will accomplish its goal of effective distribution channel when they build electronic commerce system based on consumer's trust, variety of contents, and safe paying systems.
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최훈,박웅희 東新大學校 1998 論文集 Vol.10 No.-
With the rapid growth of the Internet and related application of the World Wide Web (WWW), there is much discussion on the application of this technology in educational environment. Success of implementing information technology at the campus is largely depend upon the professor's attitudes and managing skills. The purpose of this research is to gather information how university professors use information technology; personal computer, pe-telecommunication, and internet. In addition, this research describes how professors percieve the usefulness of information technology as well as what factors influence them to use. Data were gathered via mail survey. 134 questionnaire were delivered to professors of Dong-Shin university. 70 respondents returned the questionnaire form. Date were analyzed by using SPSS-PC. Forty-four (62.8%) respondents revealed that they had difficult experiences because of their poor computer skills. Among 70 respondents, only 23 respondents indicate they use internet. However, in terms of internet training, over 80 percent of respondents pointed that they would like to participate the training class if university offers. The most common discouraging factors of internet use that respondents pointed out are expense of use, inconvenient user interface, poor English skills and misused information by others. Training should be reinforced to activate information technology use in the campus.
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무기질 혼화재의 혼입률 변화에 따른 시멘트 모르터의 특성에 관한 기초적 연구
최훈,김기철,한천구 청주대학교 산업과학연구소 1998 産業科學硏究 Vol.16 No.-
The objectlve of this study is to analyze the fundamental properties of fresh and hardened mortar with various addition ratios of the inorganic admixtures and expansive additives. As the results of the test, the flow and air content increase with the additon of expansive additives. And as the replacement rates of fly ash and silica fume increase, the flow shows a decline. At hardened state, the compressive strength, tensile strength and flexual strength decrease with addition of inorganic admixtures and expansive additives. With the increase of silica fume's replacement, they show a little decrease at early age and then increase gradually. Also, absorption and permeability show a slight decrease when silica fume is added, and a loose increase with the replacement of expansive additives and fly ash. In length change, the cement mortar show a satisfactory effect of compensating the dry-shrinkage with the addition of expansive additives.
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