• Proceedings of the KIEE Conference
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• 2000.07c
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• pp.1569-1571
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• 2000

The ageing process was checked by leakage current monitoring in Salt Fog Method. In order to monitor leakage current, DAS with 12-bit, 8-channel A/D converter was prepared. The monitored components of leakage current were averages of the rms and peak, max peak, cumulative charge, and the cumulative number of peak pulses. The acquired data were stored to the disc periodically. And, surface conductivity was measured to investigate loss of hydrophobicity. The results suggest that surface conductivity and leakage current are well corresponding to initial loss of hydrophobicity.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.11a
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• pp.505-508
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• 1999

In this study, weight loss, ESDD, surface conductivity and leakage current were measured at the different saline solutions by salt fog method. The magnitude of leakage current was higher at higher conductivity of 2 S/m saline water, but weight loss ESDD and surface conductivity which are indices of degradation were lower. This is considered that the current includes mainly ohmic component which doesn\`t contribute to surface degradation. In addition, it is shown that FFT could be useful in measuring initial transition from hydrophobic to hydrophilic surface.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06b
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• pp.41-46
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• 2007

소프트웨어 테스팅을 위해서 테스트 케이스를 작성하는 작업은 어렵고 많은 비용을 요구한다. 예로 약 100,000라인의 코드를 테스트하기 위해서는 천문학적인 테스트 시나리오들이 필요할 수도 있다. 따라서 경험 있는 테스터들은 필요한 테스트 케이스들만을 선별적으로 사용하고자 한다. 그리고 이를 위한 많은 테스트 기법들이 연구되고 있다. 그러나 다수의 연구 자료들은 기법의 효과를 이론적으로만 제시한다. 일부 사례를 통해서 그 효과를 제시하는 자료들도 있으나 그 적용 과정이 구체적이지 않아 신뢰를 얻기가 어려운 경우가 많다. 본 논문에서는 업계에서 많이 사용되는 9가지 테스팅 방법들을 소개하고 이들을 실제 개발 과제에 적용 하였다. 그리고 각각의 결과를 비교하고 분석하였다. 본 논문의 결과를 일반화하기는 어려울 것이다. 하지만 하나의 사례 연구로서 참고되고 활용될 수 있을 것이다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1999.11a
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• pp.501-504
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• 1999

The polymer insulators which are installed on outdoor have a great advantage than porcelain and 71ass, due to suppression of leakage current, light weight, low cost, etc. It needs variable evaluation methods for application of these insulators on service. The analysis of measuring leakage current is useful for ageing diagnosis because of monitoring in real-time. In this paper, we look over the recovery of hydrophobicity of silicone rubber in mini salt-fog chamber with leakage current monitoring. also, we understand the relation of between hydrophobicity and leakage current and discuss on method of leakage current monitoring.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.26 no.4
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• pp.625-630
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• 2002

To determine the residual stress, concentrated forces instead of distributed stresses, are assumed to be released around the hole drilled through. Concentrated forces are consisted with pairs of concentrated farces which have opposite directions and small distances. Residual stress determination on assumption of concentrated forces is compared numerically with normal method based on Kirsch's solution and proved to be available when released strains are measured at a little distance.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.245-248
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• 2011

본 연구에서는 광주이씨 시조이신 이당 대감 (?-1369) 음택터의 공학적인 분석을 통하여 정성적 및 정량적인 평가를 시도하였다. 이당 대감은 고려말에 국자감 생원시에 합격되고 조선시대에 들어서 자헌대부 (資憲大夫) 이조판서 (吏曹判書)겸 지의금부사 (知義禁府事)에 증직되었으며, 이당 대감 음택터의 경우 조선시대 8대 명당 중 하나로 알려져 있다. 그리고 조선시대에 정승 5명, 대제학 2명, 청백리 5명, 공신 11명을 배출한 명문집안이다. 따라서 이당 대감 음택터의 혈장을 비롯하여 각 사격을 검토하여 광주이씨 문중의 발복을 음택터의 영향으로 평가내릴 수 있는 공학적인 분석의 정성적 및 정량적인 기준을 제시하고, 과연 조선시대 8대 명당 중 하나에 해당되는지를 검토하고자 한다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.04a
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• pp.225-227
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• 2011

The geometrically sub-scaled wall-injection test model was employed to visualize interactions of internal flow of a solid rocket motor equipped fin/slot grain and submerged nozzle. Symmetric vortex and circumferential flow patterns were visualized.

• The Korean Journal of Health Service Management
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• v.13 no.1
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• pp.1-13
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• 2019

Objectives: This study was designed to determine the relationship among emotional labor, perceived organizational support, and job attitude in public health centers. Results: First, emotional dissonance had no effect on perceived organizational support. However, emotional endeavor had a positive effect on perceived organizational support. Second, perceived organizational support had a significant effect on job attitude. Third, emotional labor had no effect on job satisfaction, but emotional labor had a positive effect on job commitment. Fourth, perceived organizational support had a full mediating effect on the relationship between emotional labor and job attitude. The implications of this study are as follows. Conclusions: Higher emotional labor leads to lower job satisfaction and job commitment in public officials, thereby affecting job attitude. Accordingly, various systematic methods, such as flexible working hours and personnel policy, need to be implemented to alleviate the negative effects of emotional labor.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.2 no.1
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• pp.88-101
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• 1974

The libraries that existed during the latter period of the Yi Dynasty may be categorized into four types: the royal library, the school library, the clan community library, and the private library. Of these, the clan community library has yet received very little attention in the study of Korean libraries. In this study the author discusses the purposes, functions, and collections of the clan community library to clarify what that particular type of old libraries in Korea was. The clan community library functioned within individual clan communities to give young people Korean traditional education protecting them from possible influences of. Japanese version of Western scholarship which had threatened the traditional value systems of the society. The author believes that the clan community library was a unique community institution created by Korean people, and the Korean public library movement should trace its origin back to the activities of the libraries. Unfortunately the growing suppression and control of the Japanse colonial regime upon the traditional schools made the purposes and development of the clan community library movement a tragic experience before its flowering. The clan community library was a Korean native public library which came out in response to a historical situation and community need. It may deserve more attention in future study of the national library movement of Korea.

• Journal of Korean Library and Information Science Society
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• v.43 no.1
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• pp.417-438
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• 2012

This study is carried out to investigate the printing culture in current Chollanamdo province. Searching the publication in Naju during the Chosun dynasty, 89 titles were found, where publication had begun from early Koryo dynasty. Active Publication was initiated from the era of King Jungjong and many books were published in 16th and 19th centuries. Many Confucian books were published dominantly in the first half of the Chosun dynasty, and collective literature and genealogical records in the later half. In the first half of the dynasty, most of books were published by the order of a king, the officer of province, or an individual, and, in the later half, increasingly collective literature and genealogical records were published by an individual or a family. Also woodblocks were used in the first half of the dynasty, wooden types in the later half.