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作物에 미치는 影響을 줄이기 위한 道路 照明器具의 構造改善
崔奉九,張錫九,朴在雄 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1
Most living things have evolved ecologically, living in the environment of birth and breeding by provision of nature that has light and darkness for a specified period. The natural environment suitable to their birth and breeding is desirable in their living, but sometimes cattles are raised or plants are cultivated in order to make their special parts useful in daily life. On the other hand, as the development of industry, the abundance of life street lights and various kinds of illuminators have been established for the purpose of various convenience in daily life, as well as traffic safety and crime prevention. Nowadays, unlikely to the original purpose, loadway lights have become part of environmental pollution, resulted in having an bad influence on the growth of animals and plants in its neighborhood and to disturbing a sound sleep of people. In this paper, through the light isolation experiment of loadway lights, we can obtain a good result that plants grow up normally by improving a loadway light equipment. As a result, an improvement of loadway lights and other luminary equipment are suggested.
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말단에 키랄 중심을 갖는 열방성 액정의 합성 및 성질에 관한 연구
김재훈,최봉구 金烏工科大學校 1996 論文集 Vol.17 No.-
A Series of mesogenic compound, p-n-Alkoxyphenyl 4′-[(S)-(+)-2-methyl-butoxy] biphenyl-4-carboxylate were prepared and identified. The result were as follows, 1) All compounds appeared to be enantiotropic liquid crystal in relatively wide temperature ranges with polymorphorism. 2) All compounds showed cholesteric and smectic phase independently of the carbon number of the alkoxy group. 3) For the mesogenic compounds of the carbon numbers of 2∼4 in the alkoxy group, smectic phase was formed in the temperature super cooled by 2∼5℃. However, the other compounds of carbon numbers more than 5 in the alkoxy group showed the narrow temperature range of cholesteric phase and the wide range of smectic phase. 4) The mesogenic compounds of the carbon numbers of 6 and 8 showed chiral smectic C. Over-all smectic phase of the compound with the carbon number 6 in the alkoxy group including the chiral smectic C were observed in the wide range of 46℃(107∼153℃). For the compound with carbon number of 8, the narrow temperature range of cholesteric phase of 15℃(150∼166℃) and the widest range of 47℃(103∼150℃) were observed.
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장진해,최봉구 金烏工科大學校 1995 論文集 Vol.16 No.-
본 연구에서는 주사슬에 메틸렌기를 가지는 열방성 액정고분자(TLCP)를 합성하고, 합성된 TLCP와 PBT를 혼합 용매중에서 블렌딩하여 복합재료를 시도하였다. 합성된 액정고분자는 세가지로 그 구조는 다음과 같다. ?? HBH-6 ?? TB-S6 ?? TR-4, 6 조성에 따라 1%, 3%, 5%, 7% 그리고 10%의 LCP를 포함하는 블렌드들을 섬유형태로 만들고, 여러 연신비에 따른 기계적인 성질도 측정하였다. 이러한 연구를 위하여, DSC, TGA, X-RAY, 전자 현미경 그리고 UTM등이 사용되었다.
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李敏明,張錫九,崔奉九 大田産業大學校 1997 한밭대학교 논문집 Vol.14 No.1
This paper discribed the effect of a roadway light among various factors influencing on the growth of the plant. High pressure mercury lamp, high pressure sodium lamp and metal halide lamp as light source are used in this experiment. The standard of damage for the plant from illurmination, wavelength and the duration of a source light is investigated. According to a seasonal variation, the corps suffering heavily and lightly from a street light are presented, and then the effect of the light wavelength radiated on the corps from each light source is compared and analyzed.
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