• 한국도로학회논문집
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• 제15권3호
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• pp.117-125
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• 2013

PURPOSES: By conducting the landscape survey that considered landscape factors of the Guide Coating in the Median Barrier that applied of the various level by simulating of the Guide Coating in the Median Barrier on the expressway, they showed the quantitative standard of landscape preference factors that the Guide Coating gives. METHODS: The shape of the Structural Equation Modeling used AMOS program and made a shape that is made of landscape preference for the Guide Coating in the Median Barrier on the expressway a dependent variable. RESULTS: Result in this, they showed that functionality and emotionalism are the factors that affect the landscape preference. CONCLUSIONS: In the main study, not only showing the Guide Coating in the Median Barrier on the expressway landscape valuation but also embodying the Structural Equation Modeling(SEM) of each group, knowing the Guide Coating and unknowing the Guide Coating. By embodying this, they could study that the drivers' quantitative standard is different when the Guide Coating become first applied and being changed after.

• 조명전기설비학회논문지
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• 제26권6호
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• pp.53-58
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• 2012

A conductor has been produced according to IEC standard and low voltage electrical facility has been installed according to IEC 60364. But because of many related and varied standards, it is difficult to apply to design and inspect for electrical equipment. We researched the necessity of design guide which is detailed and systematization from survey. For detailed design guide, we suggest application method and review items at calculations for voltage drop calculations on low voltage feeder by IEC 60364, BS 7671 standard and Consumer's Electrical Installation Guide.

• 한국건축시공학회지
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• 제2권3호
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• pp.147-154
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• 2002

The Korean government makes an effort to raise the competitive power of nation through CM activation in the construction industry. Since the first CM service was applied to the atomic power plant project in 1986, the number of CM contracts are continuously being increased and will be up to 20% by 2002 in public sector. However, the public projects had been executed without any procedure manual or standard guideline of CM services. Meanwhile the Ministry of Construction and Transportation issued $\ulcorner$CM Service Guide$\lrcorner$, but the guide shows an indefinite description in the responsibility, authority and scope of activity for the project participants. Therefore, it is required the procedures be improved and scope of activities be established for the project participants. This study was generated from the comparative analysis of $\ulcorner$Standard CM Services and Practice$\lrcorner$ Published by CMAA and domestic $\ulcorner$CM Service Guide$\lrcorner$ and the case of Incheon International Airport construction. The purpose of this study is to provide the fundamental data for an improvement in the procedures of project execution and the construction manager's activities/rolls shown on $\ulcorner$CM Service Guide$\lrcorner$

• 반도체디스플레이기술학회지
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• 제21권2호
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• pp.19-24
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• 2022

The purpose of this research is to determine the hardness of guide hole. A guide pin and a guide hole of SSD(Solid State Drive) tester used to mount SSD in a fixed position accurately. The guide pin and guide hole are worn by friction due to repeated operation, and the wear is concentrated on the guide hole made of weak material rather than the guide pin made of relatively strong material. Because of that reason, it is often overdesigned in the design stage because it can lose its function. If the guide hole is made soft, the manufacturing cost will decrease, but the accuracy will decrease due to wear caused by repeated friction. If the guide hole is manufactured excessively, the manufacturing process becomes complicated and the manufacturing cost increases. It is essential to design a guide hole, but since there is no standard or verified data that can be referenced, it is difficult to design. Experimental device which guides in the same way as the SSD tester is used for this research, and three types of anodizing state are experimented for different hardness. Also, weight of COK(Change over Kit) were analyzed by measuring the wear amount and state of the guide hole according to the number of repeated attachment and detachment.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.93-98
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• 2011

The application of knowledge management concepts as a way to improve project success is an emerging topic for project management researches around the world. The Construction Extension to the PMBOK^® Guide Third Edition documents the knowledge and practices that are generally recognized as good practices for managing engineering and construction projects. However, it is not unusual to see that engineering and construction projects suffer from poor performance. Based on a critical literature review, a theoretical framework is developed for the application of knowledge management in engineering and construction projects. This framework is subsequently applied as a lens to examine the construction extension to the PMBOK^® Guide, aiming to identify the key characteristics of knowledge management in this standard. This research also aims to highlight those aspects of the construction extension to the PMBOK^® Guide that can be improved from the knowledge management perspective. Recommendations are made to improve this standard by means of applying knowledge management concept so that better project outcomes can be achieved.

• 한국연초학회지
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• 제27권2호
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• pp.226-234
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• 2005

The uncertainty of measurement in nitrate from burley leaf tobacco by continuous-flow analysis method was evaluated following internationally accepted guidelines. The sources of uncertainty associated with the analysis of nitrate were weight of standard and sample, purity of standard, dilution of standard solution, calibration curve, water content, etc. The calculation of uncertainty based on the GUM(Guide to the Expression of Uncertainty in Measurement) and EURACHEM/CITAC Guide. An expanded uncertainty was obtained by multiplying the combined standard uncertainty with a coverage factor (k) calculated from the effective degree of freedom. The concentration of nitrate from burley leaf tobacco was $2.09\%$ and the expanded uncertainty by multiplying by the coverage factor(k, 2.20) was $0.13\%\;at\;a\;95\%$ confidence level.

• 한국식품과학회지
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• 제36권6호
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• pp.885-892
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• 2004

본 실험에서는 성장기용 조제식에 함유된 유지를 대상으로 전위차 적정법 및 뷰렛 적정법에 의한 과산화물가를 측정하고 그 측정불확도를 비교하여 산정하였다. GUM(Guide to the expression of uncertainty in measurement) 및 Draft EURACHEM/CITAC Guide의 이론에 기초하여 측정불확도를 구하였으며, 불확도 인자로서 적정액의 농도, 시료량 및 적정량 등이 작용하였다. 뷰렛적정에 의한 과산화물가 측정값과 확장불확도는 $2.05{\pm}0.17\;meq/kg$ 으로 표현되었으며, 전위차적정에 의한 경우는 $1.96{\pm}0.07\;meq/kg$ 으로 표현되었다. 적정과정에서의 측정불확도가 전체불확도의 대부분을 차지하였으며, 전위차적정법에 의한 측정불확도는 뷰렛적정법에 의한 경우보다 낮게 나타나 과산화물가가 낮은 시료의 측정시에 바람직한 측정방법으로 사료되었다.

• 한국압력기기공학회 논문집
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• 제7권3호
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• pp.15-22
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• 2011

The chemistry factor and RTPTS margin for domestic reactor pressure vessel materials were analyzed by using the surveillance data which have been obtained from 8 nuclear power plants in Korea. The surveillance data have been used to assess the integrity of the pressure vessel under the pressurized thermal shock (PTS) event. The chemistry factor, which is determined by the Cu and Ni contents of vessel materials, is considered a proper tool to assess the $RT_{PTS}$. The chemistry factors, which were obtained from the surveillance data of domestic reactor pressure vessels, were investigated and compared with those of Regulatory Guide 1.99 in this study. Regressions for ${\Delta}RT_{NDT}$ were performed to expect the chemistry factor as a function of Cu and Ni, and to estimate $RT_{PTS}$ margin. The margin analysis was performed by comparing the regression graphs and standard deviations with those of Regulatory Guide 1.99. The standard deviations calculated by using the domestic surveillance data for base metal and welds are almost same as the standard deviations which are suggested on Regulatory Guide 1.99, Rev.2.

• 지구물리와물리탐사
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• 제14권4호
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• pp.274-281
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• 2011

최근 백령도 해역에서 발생한 규모 4.3에 해당하는 중규모 지진(2011년 6월 17일)으로부터 관측된 지반진동 파형을 이용하여 지진원 기구 및 수평 응답스펙트럼을 분석하였다. 분석결과를 한반도의 응력방향과 비교하였고 또한 국내 원자력 관련 구조물의 내진설계 기준과 국내 일반 구조물 및 건축물 내진설계기준과 각각 비교하였다. 지진원 연구에 이용된 지반진동은 3개 관측소(각 관측소에서 3성분)에서 관측된 전파형에 대해 모멘트텐서 기본식을 이용한 격자탐색법을 적용하여 분석하였다. 지진원기구에서 제시하는 주압축응력 방향은 ENE-WSW 방향으로 기존 한반도 전체의 주 응력방향과 대체로 유사하였다. 원자력 관련 구조물의 내진설계 기준과 국내 일반 구조물 및 건축물 내진설계기준과 각각 비교하였다. 국내 원자력시설물의 내진기준으로 이용되고 있는 Reg. Guide 1.60과 비교한 결과 특히 약 3 Hz 이상의 높은 고유진동수 영역에서 Reg. Guide 1.60 기준보다 높은 값을 보여 주었다. 또한 국내 일반 구조물 및 건축물 내진설계기준인 표준 설계응답스펙트럼을 비교한 결과 약 0.8초 이하의 단주기 영역의 전체 대역(SD 지반조건)에서 자료처리 결과가 기준을 크게 초과하였다. 향후 국내 지진활동 실정에 적합한 내진설계 기준 마련을 위해 관측자료의 질적 향상 및 양적인 축적 등을 통하여 특히 높은 고유진동수 대역에서 수평응답스펙트럼 기준의 보수성을 재고할 필요가 있다.

• 터널과지하공간
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• 제19권6호
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• pp.490-497
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• 2009

최근 발생한 5개의 중규모 지진으로부터 관측된 지반진동 파형을 이용하여 응답스펙트럼을 분석하고 결과를 국내 원자력 관련 구조물의 내진설계 기준과 국내 일반 구조물 및 건축물 내진설계기준과 각각 비교하였다. 연구에 이용된 지반진동 개수는 수평성분 및 수직성분 각각 74개 및 89개이며 주파수별 지반응답을 구하고 최대 지반 가속도 값를 이용하여 정규화 분석을 수행하였다. 본 연구결과를 국내 원자력시설물의 내진기준으로 이용되고 있는 Reg. Guide 1.60과 비교한 결과 특히 약 1 Hz 이상의 전체 고주파수 영역에서 수평 성분 스펙트럼 이 Reg. Guide 1.60 보다 높은 값을 보여 주었다. 수직성분은 약 7~8 Hz 부근에서 약간 초과하였다. 또한 국내 일반 구조물 및 건축물 내진설계기준인 표준 설계응답스펙트럼을 3개 지반조건에 적용한 결과를 분석 자료와 동시에 비교한 결과 특히 약 2초(0.5 Hz) 이하의 단주기 영역의 전체 대역(SE 지반조건)에서 수평 성분 자료처리 결과가 기준을 크게 초과하는 현상을 보여 주었다. 수직성분은 전체 주기 영역에서 SD 지반조건의 기준과 유사한 특징을 보여 주었다. 물론 이러한 현상은 국내 지각의 주파수별 감쇠 및 부지 직하부의 감쇠 특성 등과 복합적으로 관련되어 발생한 현상으로 판단된다. 향후 국내 지진활동 실정에 적합한 내진설계 기준 마련을 위해 관측자료의 질적 향상 및 양적인 축적 등을 통하여 특히 수평 성분의 약 1 Hz 이상의 고주파수 대역에서 응답스펙트럼 기준의 보수성을 심각하게 고려할 필요가 있다.