• 한국구조물진단유지관리공학회 논문집
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• 제7권1호
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• pp.259-266
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• 2003

Recently, the premature corrosion for reinforced concrete structure exposed to chloride bring about a serious problem in concrete structures. Specially, the concrete structures of sea coast are exposed much to chloride which make rapid corrosion. Thus, construction activities and maintenances for marine facilities are more demanded than those for land structures. The results of this study have been analysed to identify the extent of chloride content and incidence of carbonation for construction age. After measuring chloride content in concrete, it was conclued that about 90% of all tests on concrete samples exceed the acceptable maximum limit to risk of chloride-induced carbonation. The carbonation rate coffnient by age of train structures in the east eatimated 6. 55, 4.76 grater than 3. 727. In the basis of this result, it is necessary to maintenance for the important train facilities with the regular tests of chloride and carbonation.

• 한국실내디자인학회논문집
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• 제21권4호
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• pp.129-137
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• 2012

This study investigated the architectural characteristics and preservation status of traditional houses, designated as cultural assets in Jecheon. It aimed to provide basic information for cultural assets preservation policy in Jecheon by finding architectural characteristics of traditional houses. This study was conducted using the research methods of the existing literature and field survey to compare a current status of traditional houses. The result are as followings. Firstly, measures to protect the archetype of traditional houses are urgently needed. For systematic maintenance of local cultural assets, the relevant informations have to be constantly updated with ongoing management. Secondly, the site of traditional houses show the typical appearance of Baesanimsu(背山臨水). They were built with the hill or mountain in the north and agricultural land in the south. Types of placement are mostly closed type of 'ㅁ' shape. Thirdly, An-chae is found various type of 'ㄱ' shape, and Toet-khan was developed. Lastly, Sarang-chae is a mostly type of 'ㄴ' shape, and the traces of confucian thinking is found in floor plan.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2009년도 춘계학술대회 논문집
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• pp.997-1002
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• 2009

The local loosening of ballast supporting railway tract cause a differential vertical tract settlement. In the bridge, the temperature change make bridge deck to contract and expand, and this movement cause local loosening of ballast on the bridge expansion joint. Therefore, the evaluation of the status of ballast on the bridge expansion joint is important for the track maintenance of the high-speed railway. In this paper, hwaw method was applied to evaluate the status of ballast on the bridge expansion joint. HWAW method is non-destructive test to evaluate 2-D shear wave velocity map along the railway. Shear wave velocity is directly related with status of ballast. In this research, hwaw method was applied two different types of bridges and determine the degree and the range of the ballast loosening caused by movement of the bridge expansion joint.

• 지역사회간호학회지
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• 제8권2호
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• pp.368-380
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• 1997

This descriptive comparative study was conducted to compare the relationships among self-esteem, self-efficacy, perceived health status and the performance of health promoting lifestyles for nursing and non-nursing students. The sample consisted of 246 nursing students and 166 non-nursing students at an evening class of junior college in T city. The data was collected by a self reporting questionnaire from March 2 to March 17, 1997 and analyzed by SPSS Win. 7.0 program for frequency, mean, percentage, t -test, ANOVA, and a Pearson correlation coefficient. The results of this study are summarized as follows: 1. The results of the comparison between the two groups was not significantly different for self esteem and perceived health status, but significantly different for self-efficacy. Nursing students had higher scores on self -efficacy than non-nursing students(t=4.621. p<.05). 2. There was a statistically significant difference between the two groups concerning a health promoting lifestyle. Nursing students ($157.73{\pm}20.26$) had higher scores on total health promotion as well as its 8 subscales than non -nursing students ($048.15{\pm}21.51$,), (t=21.074, p<.001). On subscales, nursing students had the highest score in sanitary life(3.22) and the lowest score in professional health maintenance(1.54). Non -nursing students had the highest score in harmonious relationships(3.10) and the lowest score in professional health maintenance (1.48). 3. Performance in a health promoting lifestyle was significantly correlated with such demographic variables as age and grade for nursing students, and types of dwelling for non -nursing students. 4. Perceptions of good health have been positively correlated with health promoting lifestyles. Those persons who rated their health as good showed the highest score, followed by excellent ,average, poor in that order. 5. Performance in health promoting lifestyles was significantly correlated with self-esteem, self-efficacy and, perceived health status. The most important factor that affect performance in health promoting lifestyles was self -efficacy.

• 한국산업보건학회지
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• 제17권3호
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• pp.212-223
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• 2007

18 Local exhaust ventilation systems in 10 melting companies located in an industrial complex were tested to know the status of maintenance. Test items were fan flowrates, fan static pressures, rotational speeds and differential pressures of bag filters. Only 22% of the tested fans has more than 80% flowrate efficiency. 44% of the fans has lower than 60% efficiency. The performance of the fans are not in a good status. For the fans with lower than 60% efficiency, the analysis shows that the lower flowrate might be caused by the degradation of fan performance. On the other hand, for the fan s with higher than 60% efficiency, the main cause of flowrate reduction might be too much pressure losses due to clogging of filter bags. The degradation of fans usually lead the reduction of hood capture efficiency, resulting in the increase of contaminant concentrations in workplace. To keep fans in good status, self inspections should be periodically conducted. This inspection should include the measurements of flowrate and pressures. The most important thing to be performed is the initial test of local exhaust ventilation system because the initial test data should be used to know the level of system degradation.

• 한국구조물진단유지관리공학회 논문집
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• 제22권5호
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• pp.39-46
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• 2018

최근 한반도는 동계올림픽 단일팀 참가, 남북정상회담 이후 남북 경제협력 방안이 본격적으로 논의될 것으로 보이고, 도로, 철도 등 남북 주요 인프라에 대한 관심이 커지고 있다. 그리고 대부분의 북한 시설물은 고령화, 노후화 및 유지관리 불량 등 시설물의 안전성과 기능성에 대한 문제점이 제기되고 있다. 이에 본 연구에서는 북한 인프라 개선 및 개발에 대한 새로운 전략을 마련하기 위하여 성능관점의 북한 유지관리 수준을 분석하고 남북 상호 인프라 유지관리 수준을 비교하였다. 본 연구결과, 북한의 도로, 철도 등 국가기반시설과 전력 및 통신, 상하수도 등 생활기반시설의 유지관리가 매우 취약한 것으로 조사되었고, 이에 대한 보수 보강 등 개선이 시급한 것으로 나타났다. 이에 본 연구는 안전과 성능에 대한 평가를 통해 남북 유지관리 수준의 격차를 줄이고, 향후 통합 한반도 안전 및 유지관리 체계를 구축하는데 기초자료로 활용하고자 한다.

• 한국산학기술학회논문지
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• 제20권2호
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• pp.115-121
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• 2019

이 연구의 목적은 항공 정비사의 업무수행능력이 항공운항의 안전 및 효율에 큰 영향을 미치고 있는 추세를 반영하여 항공정비인적요인 교육훈련기준을 수립하는데 있다. 이를 위해 인적요인의 개념에 대한 선행연구들을 고찰하였으며, 국제민간항공기구(ICAO), 미연방항공청(FAA) 및 유럽항공안전청(EASA) 등의 선진해외항공국의 인적요인 교육훈련기준과 우리나라 항공안전법의 운항기술기준과 비교분석하였다. 또한 2곳의 대형항공사(FSC)와 4곳의 저비용항공사(LCC)의 인적요인 교육훈련실태를 조사하였다. 본 연구를 통해 우리나라의 인적요인 교육훈련기준이 국제기준에 비해 미약한 것으로 나타났으며, 대부분의 항공사 또한 인적요인 교육훈련을 체계적으로 실시하지 못하고 있는 것을 확인할 수 있었다. 이러한 연구 성과를 통해 현행 우리나라 항공정비인적요인 교육훈련기준의 문제점을 보완하고, 국제기준에 적합한 항공정비인적요인 교육과정의 표준모델을 제시할 수 있었다.

• 재활간호학회지
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• 제11권1호
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• pp.41-48
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• 2008

Purpose: The study were to identify difference in self-efficacy according to perceived health status in male smokers. Methods: The subjects were 138 male smoker in Seoul and Incheon. The data was collected using structured questionnaires from ninth of July to 16th of August in 2007. The data was analyzed by descriptive statistics and ANOVA with SPSS 14.0. Result: Participants showed that a high level of total self-efficacy score $3.40{\pm}.43$, general self-efficacy score $3.39{\pm}.46$, social self-efficacy score $3.44{\pm}.55$. There were significant difference total self-efficacy and general self-efficacy in accordance with perceived health status. But there were no significant difference social self-efficacy in accordance with perceived health status. With the result of this study, the subjects smoked $14.48{\pm}11.04$ years and 90.4% of the subjects were highly perceived that the health status of oneself above of moderate state and self-efficacy score. Conclusion: Therefore raising a perception about smoking dangerous, the prohibition of smoking program development which emphasizes the noxiousness of smoking for must precede, recognizes the necessity of prohibition of smoking and prohibition of smoking decision in one smoker comes to seem with the fact that own effect increase program for a prohibition of smoking maintenance.

• 한국건설관리학회논문집
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• 제3권4호
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• pp.123-131
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• 2002

공공 시설물별 특성을 반영하기 힘든 Incremental Budgeting 모델에 근거한 유지관리예산의 산정 및 배정은 유지관리 요구와 투자예산간의 관련성을 더욱 격리시켜, 시설물의 조기 노후화를 발생시키고 있다. Incremental Budgeting 모델의 문제점을 개선하기 위한 노력이 일부에서 진행되고 있으나, 기존 모델의 테두리에서 이루어져 근본적인 처방이라 보기 힘들다. 공공 시설물 유지관리예산모델의 해결방안은 새로운 시각에서 바라보아야 한다 이러한 관점에서 $50\%$ 이상이 80년대 이전에 축조되었으며, 최근 대형화$\cdot$현대화되는 추세인 국방시설을 대상으로 문헌연구와 전문가 면담조사를 통해 적합한 유지관리예산모델을 선정하고, 이에 따른 현행 업무프로세스를 개선하였다.

• 제어로봇시스템학회논문지
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• 제18권5호
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• pp.445-452
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• 2012

With the increasing number of high-rise and large-scale buildings, modern buildings are becoming intelligent, and are incurring high construction costs and requiring careful maintenance. Maintenance works for high-rise buildings significantly depend on human labor, unlike other construction processes that are gradually being automated. The resulting accidents may produce very high social and economic losses. To address this problem, herein, this paper proposes robotic building maintenance system using multi-robot concept, in specific, cleaning a building facade which is directly subjected to minimize human labor; that improves the process efficiency and economic feasibility. The sensor for detecting contamination of building's outer-wall glass is proposed; Kalman filter was used for estimating robots' status with the contamination of the window glass. Task allocation of the sensor based multi-robots for an effective way of task execution is introduced and the feasibility was verified through the simulations.