• 동력기계공학회지
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• 제18권6호
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• pp.70-76
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• 2014

Surely fuel economy(F.E.) label is needed to meet consumer's right to know. Korea has developed and adopted F.E. correction equation similar to the feeling, because consumer complain about F.E. label higher than they feel. Recently, through continuous research and development high-efficiency & performance green car like HEV, PHEV and EV are being sold. In this situation, it is needed to know whether the current equation can reflect a part of their improved technic or not. In this paper, to review current equation through test using hybrid vehicles on 5-cycle SOC, correction equation and F.E were discussed. The result show HEV didn't meet the SOC error standard on US06. Also, HEV has bigger F.E. difference between FTP-75 and 5-cycle than conventional vehicles. However, the correction equation that include HEV almost same with current one.

• 터널과지하공간
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• 제23권3호
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• pp.161-168
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• 2013

세계적으로 Modern High-Power TBM을 이용한 터널공사가 점점 많아지고 있다. 특히 오늘날의 고성능 TBM의 개발로 많은 터널공사에서 성공적인 결과를 가져왔으며, TBM 동력의 향상과 커터 등 면판설계 기술의 발달, 및 TBM 굴진율 예측 소프트 웨어의 사용 등으로 터널공사의 자동화, 기계화가 이뤄 졌으며, TBM 장비조달은 OPP 방식을 이용한 발주자 직접 구매 방식이 TBM 선진국에서 효과적으로 사용되고 있다. 최근 많은 나라에서 환경 민원 등의 문제로 인해 도심지의 발파공법사용이 금지되어 TBM을 이용한 터널의 기계화 시공이 세계적인 추세이다.

• Journal of Nutrition and Health
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• 제25권2호
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• pp.150-161
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• 1992

The purpose of this study was to evaluate the riboflavin status of primary school children. Fiftyone subjects were selected as obese group and fiftyfive subjects were selected as control group according to Body Mass Index(BMI) of fifth-graders at a primary school in Taegu. For each subject information on nutrient intake and daily activity pattern were obtained by questionnaire. The riboflavin status was evaluated by urinary riboflavin exvretion The daily energy expenditure per kilogram of body weight was significantly lower in obese group(=47kcal/day) than in control group(=58kcal/day) (p<0.001) However the entire energy consumption was siginificantly greater in the obese children(=2005kcal/day) than their nono-baser peers(=1837kcal/day)(p<0.001). Riboflavin intake was 0.67mg/100kcal in the control group and 0.61mg/1000kcal in the obese group. Thus intakes for both groups met the current group and control group were 86.9$\mu\textrm{g}$/day and 98.7$\mu\textrm{g}$/day. repectively. There was no significnat Assesment of clinical signs of riboflavin deficiency indicated that angular lesion was 4.7% and glossitis was 6.6% of all subjects. Thirty one percent of subjects excrete riboflavin below 78$\mu\textrm{g}$/g creatinine which is defined as deficient. Therefore this group would be considered at high risk for developing riboflavin deficiency. From this study current recommendation of 0.6mg/1000kcal of riboflavin intake may not be adequate during growth and associated stress.

• 한국가스학회지
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• 제2권3호
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• pp.70-77
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• 1998

본 연구에서는 가스시설의 설비 운영 및 보수시에 존재할 수 있는 다양한 인적오류를 확인하고 평가하는 정성적인 기법을 제안하였다. 이것은 정성적 평가 기법들이 갖는 기본적 성격들, 즉 도표화된 형태로 구성된 분석 체계와 각 기법마다 이탈적 현상을 표기하는 가이드워드 체계를 인적오류분석에 적합한 방법으로 고안한 것이다. 그리고 제안한 방법을 실제 밸브기지의 중요 시스템인 정압기 시설의 보수 절차서에 대하여 적용하였다. 그 결과로서 보수작업시에 발생할 수 있는 인적오류를 도출하고 제안한 인적오류평가 방법의 타당성을 검증하였다.

• Structural Engineering and Mechanics
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• 제34권1호
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• pp.39-60
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• 2010

In Turkey, majority of industrial facilities are composed of precast buildings. However, precast buildings have suffered extensive damage during Kocaeli and Duzce (1999) and Adana-Ceyhan (1998) earthquakes. Therefore, in this study, fragilities of existing building stock and damage probabilities of precast buildings were studied. For this purpose, building inventories were prepared and variation of structural parameters was determined by investigating the design project of 65 precast buildings constructed in Denizli, Turkey. Twelve analysis models which reflect the stiffness, strength and ductility properties of building inventory were constructed. After the definition of strain based displacement limits and corresponding damage states for buildings, displacement demands were calculated by using non linear time history analysis. During the analyses 360 strong ground motion records were used. Exceedence ratios of concerned damage limits was calculated by checking the displacement demands and then PGV based fragility curves were constructed. Efficiency of strength, stiffness and ductility properties of existing precast buildings were investigated by comparing the fragility curves. The results have shown that the most effective parameters that govern the damage probabilities of precast buildings are stiffness and ductility. It was also stated that the results of fragility analysis and damage and failure observations performed after Kocaeli and Duzce Earthquakes are compatible.

• 공학교육연구
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• 제21권5호
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• pp.54-63
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• 2018

The university assessment of Industrial point of view that is the evaluation of university's outcomes was started in 2008 to find out university's social and industrial contribution rate by evaluating the added value of raising up competent people and technical development through university courses. This study is for analyzing outcomes of university assessment of Industrial point of view in the second period and searching for improvement suggestions of evaluation indexes and ways. The outcomes of university assessment of Industrial point of view in the second period is that are the contributions overcoming the difference of industrial requests and university's courses, information offering to university about industrial requests, the substantiate indicator for evaluating the suitability of university's courses and the improvement of university's competitiveness through course's upgrades, The ways improving the university assessment of Industrial point of view are introducing the ways of industrial university's consulting, evaluation for certification and involving graduate school's courses assesment, reinforcing the analysis of industrial requests, improving the indexes of courses and setting up feedback system.

• 대한조선학회논문집
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• 제56권2호
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• pp.161-167
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• 2019

In general, fatigue analysis is performed by using deterministic model to estimate the optimal parameters. However, the deterministic model is difficult to clearly describe the physical phenomena of fatigue failure that contains many uncertainty factors. With regard to this, efforts have been made in this research to compare with the deterministic model and the stochastic models. Firstly, One deterministic S-N curve was derived from ordinary least squares technique and two P-S-N curves were estimated through Bayesian-linear regression model and Markov-Chain Monte Carlo simulation. Secondly, the distribution of Long-term fatigue damage and fatigue life were predicted by using the parameters obtained from the three methodologies and the long-term stress distribution.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2017년도 학술발표회
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• pp.246-246
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• 2017

서울과 같은 대도시 지역은 인구와 산업이 집중되어 있기 때문에 작은 규모의 수재해로도 큰 피해를 입을 수 있다. 또한 국지적으로 발생하는 집중호우는 도시 지역에 돌발홍수를 일으킬 수 있기 때문에 국지 예보는 도시 지역에서 매우 중요한 역할을 하고 있다. 레이더는 먼 거리에서의 악기상을 빠르게 관측할 수 있기 때문에 도시 지역 수재해 방지에 큰 역할을 할 것으로 기대되고 있다. 특히 X 밴드레이더는 높은 시공간 해상도의 관측 자료를 제공하고 있어 도시 지역에 적합한 레이더로 알려져 있다. 국내에는 건술기술연구원, 고려대학교, 연세대학교에 X밴드 이중편파레이더가 도입되어 서울 지역에서의 수재해 감시 역할을 수행하고 있다. X밴드 이중편파레이더는 반사도, 차등반사도, 차등위상차, 비차등위상차 등 다양한 레이더 편파변수들을 제공하고 있다. 이중 비차등위상차는 감쇄와 부분차폐의 영향을 받지 않아 비차등위상차로부터 추정된 레이더 강우는 큰 강우 강도에서 정확도가 높은 것으로 알려져 있다. 본 연구에서는 이러한 비차등위상차로부터 추정된 레이더 강우량에 대한 정확도를 평가하였다. 이를 위해 2013년부터 2016년까지 관측된 건설기술연구원 X밴드 이중편파레이더 자료(42개 강우사례)를 활용하였다.

• 자동차안전학회지
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• 제13권2호
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• pp.24-29
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• 2021

In order to prevent automobile accidents internationally, advanced safety devices are actively being developed. Among them, Auto Emergency Brake (AEB) function and Forward Collision Warning (FCW), which are used to prevent or reduce frontal collision, have been studied for a long time, and are being researched by various manufacturers to develop better performance. In fact, in the case of large vehicles, it is mandatory for AEB to be installed in Korea. Accordingly, a variety of Vehicles equipped with AEB and FCW are coming out, and inspection of these mounting devices is a necessary system in the future. This study confirms how AEB and FCW are currently assessed in regulation and the New Car Assesment Program (NCAP), This is a basic study of the matters to be considered in preparing AEB and FCW inspection standard by checking the performance of vehicles equipped with forward collision protection and identifying the vehicle's sensitivity, range and speed of radar sensors, and target vehicles based on CAN communication data.

• 문화기술의 융합
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• 제7권4호
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• pp.227-236
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• 2021

본 연구는 찾아가는 동 주민센터 방문간호사의 사업에 대한 인식 및 참여경험을 파악하여 방문간호사업의 효율적 운영 및 사업의 발전 방향을 마련하고자 방법론적 트라이앵귤레이션 연구방법을 적용하여 시도하였다. 방문건강 관리사업의 전달체계, 간호사의 인식 및 참여경험을 파악한 결과, 방문의 효율성을 위해 방문현장 상황을 고려한 방문간호 관리인원, 건강평가, 정보시스템 등 사업기준의 보완이 필요한 것으로 나타났다. 본 연구에서 제기된 주요 이슈를 공유함으로써 정책적 대안이 개발되어야 함을 제언한다.