• The Hankook-Saengyark Bo
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• no.236
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• pp.1-1
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• 1999

• The Hankook-Saengyark Bo
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• no.121
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• pp.1-1
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• 1987

• Korean Deer Journal
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• no.24
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• pp.32-35
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• 1995

• Korean Deer Journal
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• v.3 no.4 s.15
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• pp.63-63
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• 1998

• Korean Journal of Medicinal Crop Science
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• v.12 no.6
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• pp.500-507
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• 2004

The establishment of an efficient protocol of plant regeneration from leaf explant cultures of Perilla spp. is reported. Regenerated shoots were obtained from leaf explant cultures on solid MS medium containing different concentrations of cytokinins and auxin. The effect of cytokonin and auxin differed depending on each acession. The combination treatments of high level of cytokinin and low level of auxin was more effective for plant regeneration in Perilla frutescens. The best concentration of sucrose was 3% for regeneration. Of spermidine, spermin and putrescine. treatments, the most effective treatment for plant regeneration was $10\;mg/{\ell}$ spermidine.

• Journal of Bio-Environment Control
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• v.6 no.3
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• pp.216-224
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• 1997

In the recent 10 years the protected cultivation area in Korea has been increased rapidly, and now it is very important issue to develop the heating and cooling system using the renewable energy, because the greenhouse heating and cooling cost is increased with the fossil fuel price rises. Actually the development of the cooling system is more difficult than that of the heating system, since the cooling load of greenhouse in the summer season is 2―3 times larger than the heating load in the winter season. In this study low temperature phase change materials (LTPCM) for the cold storage system were selected and developed. The theoretical and experimental analysis of thermal characteristics of LTPCM makes it possible to control the phase change temperature and stabilize the thermo-physical properties. LTPCM developed in this study has good advantages to be used as the cold storage not only for the house and working space in factory but also for the cold storage of agricultural and live-stock products.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1996.06a
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• pp.237-240
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• 1996

본 논문에서는 방향성을 갖는 새로운 공간적응 조절연산자와 비선형필터를 이용한 제한 반복적 영상복원 알고리듬을 제안하고 제안한 알고리듬의 수렴성에 대하여 분석을 하고 있다. 일반적인 제한반복적 영상복원 기법에서는 열화된 영상을 복원하는 과정에서 에지 및 경계부분의 재번짐이 지나친 잡음성분의 증폭에 의한 고리현상 등이 발생한다. 이러한 문제들을 해결하기 위하여 본 논문에서는 다음과 같은 기법을 도입하고 있다. 첫째는, 방향성을 갖는 새로운 공간적응 조절연산자를 적용하여 에지 등의 재번짐을 막고 고주파수 영역의 복원성능을 개선하고 있다. 둘째로, 적응적인 비선형필터를 사용하여 잡음성분과 같은 고주파수 영역의 지나친 증폭에 따른 문제를 해결하고 있다. 그리고, 제안한 논문의 안정성과 수렴성을 보장하기 위한 조건을 분석하고 있다. 열화된 영상에 대하여 실험한 결과, 기존의 다른 결과보다 우수한 성능이 있었고, 특히, 에지의 복원성능 및 고리현상의 제거에 두드러진 특징을 나타내었다.

• 한국경영정보학회:학술대회논문집
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• 2008.06a
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• pp.1066-1071
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• 2008

모바일 광고는 새로운 마케팅커뮤니케이션 수단으로 부상하고 있다. 본 연구는 효과적인 모바일 마케팅 전략을 수립하기 위해, 어떤 광고유형, 메시지 내용이 광고태도에 유의한 영향을 미치는 분석하고자 실험연구를 하였다. 즉 주 실험변수인 광고의 유형(text/icon)과 광고 메시지 특성(쾌락적/실용적)에 따른 광고 태도의 변화를 알아보고자 하였다. 또한 광고태도에 영향을 미치는 광고제품의 유형(탐색재/경험재)의 조절효과를 살펴보았다. 그 결과, 광고유형과 광고메시지 특성별로 광고 태도에 차이를 확인할 수 있었다. 또한 광고유형과 메시지특성이 광고태도에 영향을 미치는데 제품유형의 조절효과가 있는 것으로 확인되었다. 한편 광고태도는 브랜드태도에 유의한 영향을 미치는 것으로 나타났다.

• Solar Energy
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• v.17 no.3
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• pp.23-33
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• 1997

The theory on phase change temperature control and nucleation of PCM was suggested in this research. The crystallization model of PCM was established. And H2O-NaCl mixtures were selected as cold storage materials for agricultural products and thermo-physical properies of the PCM were analyzed with experimental processes including freeze-thaw cycles.

• Korean Journal of Medicinal Crop Science
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• v.14 no.4
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• pp.225-228
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• 2006

To acquire the normal regeneration of plantlets, we investigated combinations and concentrations of plant growth regulations for optimal conditions of adventitious root formation. Based on the previous study, we performed callus and shoot induction. When induced shoot was transferred into a rooting medium containing plant hormones, it wilted and died. Thus, the shoot proliferated on 1/2 MS medium for 10 days and was then treated with MS medium supplemented with 3.0 mg/L NAA for 3 days. Adventitious root formations were observed after shoot planlets were transferred to 1/3 MS medium. The concentrations of salt and sucrose were gradually reduced in MS medium and the rooted plantlets were transferred for acclimatization into a mixture of peatmoos : perlite (3 : 2).