• 대한전기학회논문지:전기물성ㆍ응용부문C
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• 제48권8호
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• pp.580-586
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• 1999

Aging characteristics of 13 years service-aged distribution cable terminations which dismounted from 3 regions were investigated by material characterization and electrical test. All dismounted terminations have propagating micro-cracks on the surface of weathershed and chalking fillers from bulk. Elemental analysis of these terminations showed that the carbon was decreased and the oxygen was increased on the surface of weathershed due to a little oxidation reaction. Contact angle of terminations was abnormally increased with time. In the analysis of anti-oxidation ability and chemical structure, there were no differences between new and dismounted terminations. All terminations showed satisfactory results in electrical test. Therefore, itcan be considered that aging is only propagating on the surface of dismounted terminations. Also, it was confirmed that environmental factors such as UV, pollution and salt have an effect on the aging through the observation of polymer composition change.

• 한국어병학회지
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• 제26권2호
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• pp.123-128
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• 2013

The outbreak of haemorrhagic speticemia and dermal lesions in cultured Rock sea breem in Jeju Island are frequently associated with keratitis. Prolonged infection leads to the symptoms accompanied by necrosis of fin and skin and the fishes died. Present study aims to study the histopathological changes of diseased fish muscle tissue. The tissue at the initial stage of infection showed normal muscular texture, however in the late stages of infection, muscular lesion had been expanded and hence, necrosis had progressed deeply into muscle tissue. Mild tissue in caudal fin was found with more necrosis, and gill tissues were also collapsed. In Kidney, renal tubules were teared along with tissue destruction (Espada, J et al, 1993). Hence in the present study, we examined the histopathological variation of the infection fishes, and this basic data would be used for future research of in haemorrhagic specticemia and dermal diseases.

• Corrosion Science and Technology
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• 제5권4호
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• pp.123-128
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• 2006

It was analyzed the causes of boiler tube rupture due to a degradation and corrosion on the boiler tubes in fossil power plant. The experiments were carried out among samples taken from the operating facilities. The result were analyzed based on experimental results from mechanical strength, microstructure observation, and hardness measurement in order to determine the cause of local rupture on boiler tubes. In general, 2.25Cr-1Mo steel generates carbides, it is coarsened, its ductility and strength abruptly decreased as degradation is in progress, In order to confirm this phenomenon, we observed changes of the mount of Cr and Mo of carbide by carrying out EDX chemical composition analysis. The amount of Cr and Mo in the degraded material or service exposed material gradually increased the amount of Mo but initially they were almost maintained at the same amount. Furthermore, we observed that the carbide become coarsened both in the grain and at the grain boundary. Tensile test was carried out to measure a material hardness and to recognize a drop-off of hardness. Overall result for tensile strength and hardness turned out to be lower than new material and mechanical strength and hardness was degraded as the material degradation was in progress.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.112.2-112
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• 2003

Levels of blister rust infection (from Cronartium ribicola) varied in western white pine(Pinus monticola Dougl.) seedlings grown in two nurseries in northern Idaho. This observation suggested the potential importance of environmental components operating on the blister rust pathosystem. In an experiment designed to test the influence of environmental conditions at two nurseries, seedlings of a single genetic source were unintentionally held in cold storage for 6 months longer at one nursery than at the other. Subsequently, these seedlings, which had been growing under nursery conditions for 7 months or 1 month, were inoculated with blister rust spores on September 9th, 1999. Infection efficiency measured on the seedlings with only 1 month of growth was 70X greater than on the seedlings that had 7 months for their new growth to mature. Results from this nursery test and infection levels of northern Idaho resistant selections in mild climates suggest that expression of genes related to rust resistance in western white pine can be manipulated by regulation of phonology. If so, several new molecular tools may be employed to enhance our understanding of environmental regulation of genes for blister rust resistance.

• 대한원격탐사학회지
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• 제27권6호
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• pp.753-760
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• 2011

The satellite Chollian was successfully launched on June 27, 2010 and is expected to perform its communication, oceanographic, and meteorological duties for seven years. The follow-up launch of the Chollian satellite is already being planned, and diverse studies are under way to enable the use of the Korean satellite data. Studies are also being actively conducted in and out of Korea to visualize the meteorological data on the open-source virtual globes. The meteorological data include ground observation, satellite, and digital-model data. In this study, an efficient three-dimensional technique was developed to visualize typhoons on the virtual globes using the Chollian satellite data. This study was conducted to provide service to the public via the scientific visualization of the satellite image data, and to create an efficient satellite image analysis environment for meteorological researchers.

• 항공우주산업기술동향
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• 제7권2호
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• pp.48-58
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• 2009

1960년대부터 최고 2K까지의 극저온 냉각이 필요한 부품을 탑재하는 위성체의 개발에 극저온 냉각기술들이 채택되어왔다. 최근에는 과학용, 군사용 및 기상관측 임무용등 적외선 광학계를 탑재한 위성개발 프로그램 이 급격히 증가함에 따라 극저온 기술의 괄목할만한 성장을 이루고 있다. 일반적으로 극저온 냉각기술은 적외선 광학계 내에 존재하는 잡음을 최소화하기 위하여 광학 요소 및 검출기를 냉각하는데 사용되며, 요구온도, 열량 및 작동 수명에 따라 요구되는 냉각기술이 달라진다. 본 논문에서는 최근의 우주용 극저온 냉각기술의 동향에 대하여 기술하고자 한다.

• 한국도서관정보학회지
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• 제42권1호
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• pp.165-182
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• 2011

이 글은 장서문제를 중심으로 지적자유의 의의를 고찰하고 관련 사례를 일별하여 도서관 장서개발에 시사점을 제공하고자 한 연구의 결과물이다. 최근 여러 사례를 통해 지적자유에 대한 관심이 증가하고 있는데 반하여 우리나라에서의 관련 논의는 많지 않다. 따라서 이 연구에서는 정보서비스 현장에서 관찰되는 지적자유의 의의와 사례들을 바탕으로 지적자유를 보장하기 위한 노력의 다양한 측면들을 연구하고자 하였다. 이를 통하여 정보에 접근할 수 있는 자유 즉, 사상과 표현의 자유의 개념, 공권력에 의한 정보독점과 정보통제의 문제, 그리고 이에 대한 접근권을 요구하는 알권리의 개념 등 제도적 장치와 도서관계의 노력들을 고찰하고자 하였다. 특히 현대 정보사회에 있어서 지적자유란 어떠한 의미를 지니는지 살펴보고 관련 문건과 정책문서 등을 통해 세계적 흐름에서 지적자유의 문제를 조망하고 우리 도서관계에 암시하는 바를 제시하고자 하였다.

• 한국보건간호학회지
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• 제30권2호
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• pp.288-299
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• 2016

Purpose: This study was to identify the current issues and challenges of the nursing education program in Cambodia and to suggest recommendations to improve it. Methods: The World Health Organization Global Standards for the Initial Education of Nurses and Midwives were used as the analytic framework. Data were collected through a critical, constructive analysis of the literature, as well as observation with stakeholders in the area. Results: Cambodia experienced a shortage of nurses based on the demands of nurses. Moreover, the lack of institutional capacity, out dated and rudimentary nursing curriculum, under qualified nursing faculty, overcrowded classrooms, and lack of fundamental education materials and equipment for nursing education hampered the maintenance and improvement of the quality of pre-service nursing education in Cambodia. Conclusion: Strengthening the nursing educational resources and infrastructures, along with proper retention and enhancement of the faculty's capacity, clinical mentorship, and sustainable management of the nursing curriculum were recommended. Integrating the nursing theory and process into clinical practice and using strategic partnerships, would improve the quality and quantity of nursing education in Cambodia. There needs to be a synergistic relationship between nursing education and training relevant to the nursing care to meet the needs of the Cambodian population.

• 한국생활과학회지
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• 제17권3호
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• pp.399-411
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• 2008

The study purposes to survey teacher's and child's difficulties which full day classes of public kindergarten regrouped in the afternoon time are having. The subjects are 4 full day class pre-service kindergarten teachers and 8 full-day class children in G Metropolitan City and in J Province. Data were collected through in depth interviews and participatory observation. According to the results, the variables of teachers' difficulties in managing full day classes regrouped in the afternoon time are "living as an outsider without a sense of belonging", "living as a false teacher rather than a real class teacher", and "living as a teacher giving specialty and aptitude education". The variables of children's difficulties are "moving like a migratory bird", "watching the clock and the door", and "being unable to concentrate". The study is expected to be useful as one of basic findings for desirable management of kindergarten full day classes regrouped in the afternoon time.

• 정보관리학회지
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• 제21권2호
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• pp.269-283
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• 2004

정보사회에서 효율적인 정보전달서비스 방법가운데 대면서비스 외에 인터넷과 같은 커뮤니케이션 수단을 활용한 가상 정보서비스의 가능성도 제기되고 있다. 본 논문에서는 정보전달서비스 즉 정보의 제공과 전달을 가능케 하는 중요한 수단인 인터넷상의 정보매개체에 대한 중요성을 바탕으로 아바타를 활용하는 방안을 제시하고자 한다. 이를 위하여 먼저 정보서비스의 개념과 인터넷의 발전에 따른 변화 등에 관한 이론 및 특징을 살펴본 뒤, 아바타에 관한 개념 및 현황 그리고 특성을 바탕으로 아바타의 현실적인 의미와 중요성을 강조하고자 한다. 그리고 보다 효율적인 정보서비스를 구현하기 위해서 아바타의 활용과 기대효과를 제안함으로써 인터넷상에서 보다 효율적인 정보전달서비스를 실현하는데 일조하고자 하였다.