• 대한예방의학회:학술대회논문집
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• 2005.10a
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• pp.402-402
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• 2005

• Proceedings of the Korean Society of Life Science Conference
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• 2005.04a
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• pp.219-219
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• 2005

• Proceedings of the Korean Society of Life Science Conference
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• 2005.04a
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• pp.218-218
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• 2005

• 대한예방의학회:학술대회논문집
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• 1996.10a
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• pp.363-364
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• 1996

• Transactions of the Korean Society of Machine Tool Engineers
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• v.14 no.4
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• pp.69-74
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• 2005

Nowadays CFC and HCFC refrigerants are restricted because they causes to depletion of ozone layer. Accordingly, an experiment is apply to the $NH_3$ gas for refrigerant to study the performance characteristic and to improve the energy efficiency. An experiment are carried out for the condensed pressure in a range from 14.5bar to 16bar and for degree of superheat in a range from 0 to $10^{\circ}C$ at each condensed pressure. As the result of experiment, when degree of superheat is $1^{\circ}C$ and condensed pressure is 14.5bar, the refrigeration system showed the high performance.

• Child Health Nursing Research
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• v.18 no.3
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• pp.95-100
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• 2012

Purpose: The purpose of this study was to facilitate home visits to assess the current rate of child abuse in order to provide an agenda for the early detection and prevention of child abuse and neglect in Korea. Methods: For this retrospective descriptive research, 20 public health centers were selected, 1,991 families were visited and 2,680 children were assessed. Results: We found 415 cases (15.5%) of potential abuse and 7 cases (0.3%) of actual abuse. The greatest risk group was to children age 4 to 6 years. According to the HOME Inventory, there were 17 infants (5.8%) presenting a potential risk for child abuse and neglect. Conclusion: Visitation screening is highly recommended for prevention in the high-risk preschool age group.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2003.11a
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• pp.81-85
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• 2003

In round numbers the 100 strains of entomopathogenic nematodes were isolated through the investigation of cultivated including the ginseng forming cultivated and forest soil samples by silkworm trap. The 28 strains of nematodes were selected among the isolated entomopathogenic nematodes that were confirmed the pathogenicity against Holotrichia morosa, Hoiotrichia diomphalia and Ectinus sericeus, the pest of korean ginseng and silkworm. Pathogenicity of the 2025, 2027, 2028, 2034, 2039 and 2057 strains was excellent. Selected entomopathogenic nematodes are classified of two species by morphologiacl and molecular studies, which were Sterinernma carpocapsae sp. and Diplogaster lethier sp.. Diagnostic characters include body length, lateral field pattern, tail shape and so on. The DNA sequences of the ITS region of rDNA shows similar to S. carpocapsae and .D. lethier. Isolated entomopathogenic nematodes were demonstrates that are quite within the realms of possibility for biological control agents of the pests of Korean Ginseng.

• 한국약용작물학회:학술대회논문집
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• 2007.05a
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• pp.294-295
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• 2007

• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.27-28
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• 2016

실시간 렌더링 시스템에서 시야를 변경하는 속도가 증가할수록 FPS(Frame Per Second)가 감소하는 문제가 발생한다. 이에 따라 시야 변경이 증가할수록 감소하는 FPS를 향상하기 위한 렌더링 최적화 기술이 요구되며, 본 논문에서는 동적 LOD(Level of Detail)와 컬링 기술을 적용하여 실시간 렌더링 과정에서 렌더링 데이터를 감소함으로써 저하되는 FPS를 증가시키기 위한 렌더링 최적화 기법과 HMD(Helmet Mounted Display)의 움직임에 따라 변경된 시야각을 적용한 OSG(Open Scene Graph) 기반 실시간 렌더링 시스템을 제시한다.

• The Korean Journal of Financial Management
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• v.14 no.3
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• pp.137-156
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• 1997

본 연구의 목적은 최근 자본비용 추정에 대한 신뢰성 및 정확성에 대한 비판에도 불구하고 주로 미국과 일본 등을 중심으로 기업전체를 대상으로 한 과거의 연구에서 벗어나 한국의 상장기업을 대상으로 좀 더 미시지적이고 정교한 자본비용을 추정하는 데에 있다. 1981년 이후 1994년까지 계속 상장되어온 190여개 상장업체의 재무제표를 사용하여 각 기업별 자본비용을 추정함으로써 산업별(업종별) 그리고 5대(大) 계열기업군, 6대(大)${\sim}$30대(大) 계열기업군, 기타 대기업, 그리고 중소상장기업 등 기업규모별에 따른 자본비용의 정도를 비교 분석하였다. 자본비용의 추정과정에 있어서도 가능한 한 각 개별기업의 재무제표 항목들을 자본비용의 개념에 적합하도록 재구성하고, 법인소득세율을 이익수중에 따라 차등 적용하는 등 기존의 자본비용의 추정에 관한 연구에 비해 좀 더 정교한 자본 비용의 추정을 시도하였다.