• 한국주거학회논문집
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• 제12권4호
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• pp.205-217
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• 2001

The purpose of this study was to analyze the internet site components related to housing informations, and to find determinants affecting college students' self-assessment for internet site of housing. the major findings were as follows; First, four factors were retained from the site components related to housing informations. Second, the college students' satisfaction with the site components was differed by the sex and taking computer courses or not. Third, the sex, monthly pocket money, computer skill of students, and usefulness of internet site were the determinants affecting college students' self-assessment to internet site of housing. Male students rather than female counterpart were, the less the monthly pocket money was, the less the computer skill was, and the more usefulness of internet site was, the more satisfied with the internet site of housing.

• 복식문화연구
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• 제28권6호
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• pp.801-814
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• 2020

The purpose of this study was to explore the importance level, the present level, and the educational need for 21 business ethics components among 2-year and 4-year college students majoring in fashion. Survey data of 364 students (128 students of 2-year colleges and 238 students of 4-year colleges) were analyzed through descriptive statistics, Borich's needs assessment for education, The Locus for Focus model, exploratory factor analysis, and t-test. The results showed five business ethics components ranked highly as educational needs among college students: 'reducing waste', 'using vegan materials', 'using human-friendly materials', 'strengthening sustainable technologies', and 'promoting workers' rights'. Those components should be integrated into curricula of fashion majors in colleges. Students in 4-year colleges considered most of 21 business ethics components as more important than did students at 2-year colleges. More needs for education were observed by 4-year college students in eight business ethics components than by 2-year college students. In addition, a positive attitude toward business ethics education and the suitability of business ethics education were higher among 4-year college students than 2-year college students. Results provide a guideline for business ethics education by indicating a list of business ethics components that urgently needed to be adapted to fashion curricula according to each college type.

• 한국안전학회지
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• 제19권4호
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• pp.36-41
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• 2004

This paper presents an qualitative assessment for hazard on the electric power installations of a construction field using FMEL The power installations have the mission to maintain the highest level of service reliability on the works. The more capital the electric power invest the higher service reliability they plausibly will achieve. However, because of limited resources, how effectively budgets can be allocated to achieve service reliability as high as possible. The assessment typically generates recommendations for increasing component reliability, thus improving the power installation safety. The FMEA tabulates the failure modes of components and how their failure affects the power installations being considered. Tn order to estimate the risks of a failures, the FMEA presents criticality estimation or risk priority number using the severity, occurrence, and detectability. The results showed that the highest components of the risk priority number among components were condenser, transformer, MCCB and LA. And In case of the criticality estimation, the potential failure modes were abnormal temperature rise, insulation oil leakage, deterioration for the transformer, overcurrent for the MCCB and operation outage fir the LA.

• Earthquakes and Structures
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• 제19권6호
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• pp.471-484
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• 2020

Previous earthquakes show that, structural safety evaluations should include the evaluation of nonstructural components. Failure of nonstructural components can affect the operational capacity of critical facilities, such as hospitals and fire stations, which can cause an increase in number of deaths. Additionally, failure of nonstructural components may result in economic, architectural, and historical losses of community. Accelerations and random vibrations must be under the predefined limitations in structures with high technological equipment, data centers in this case. Failure of server equipment and anchored server racks are investigated in this study. A probabilistic study is completed for a low-rise rigid sample structure. The structure is investigated in two versions, (i) conventional fixed-based structure and (ii) with a base isolation system. Seismic hazard assessment is completed for the selected site. Monte Carlo simulations are generated with selected parameters. Uncertainties in both structural parameters and mechanical properties of isolation system are included in simulations. Anchorage failure and vibration failures are investigated. Different methods to generate fragility curves are used. The site-specific annual hazard curve is used to generate risk curves for two different structures. A risk matrix is proposed for the design of data centers. Results show that base isolation systems reduce the failure probability significantly in higher floors. It was also understood that, base isolation systems are highly sensitive to earthquake characteristics rather than variability in structural and mechanical properties, in terms of accelerations. Another outcome is that code-provided anchorage failure limitations are more vulnerable than the random vibration failure limitations of server equipment.

• 대한기계학회논문집A
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• 제23권11호
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• pp.2022-2032
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• 1999

In recent years, the subject of remaining life assessment has drawn considerable attention in the power generation industry. In power generation systems a variety of structural components, such as steam pipes, turbine rotors, and superheater headers, typically operate at high temperatures and high pressures. Thus a life prediction methodology accounting for fracture and rupture is increasingly needed for these components. For accurate failure assessment, in addition to the single parameter such as K or J-integral used in traditional fracture mechanics, the second parameter like T-stress describing the constraint is needed. The most critical defects in such structures are generally found in the form of semi-elliptical surface cracks in the welded piping-joints. In this work, selecting the structures of surface-cracked plate and straight pipe, we first perform line-spring finite element modeling, and accompanying elastic-plastic finite element analyses. We then present a framework for including constraint effects (T-stress effects) in the R6 failure assessment diagram approach for fracture assessment.

• 한국산업융합학회 논문집
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• 제13권4호
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• pp.211-217
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• 2010

As the vehicle components are various, we confront unexpected problems in the development and application of them. also warranty expenses occur in the result of unconfirmed warranty.in this paper, to solve the problems of disconnection of damper Strut cable, we applied the optimum conditions through taguchi method for improvement of durability. and we made standard of reliability by weibull analysis of the field data. we acquired reliability standard by correlation with lab data and confirmed improved components satisfying the target of reliability. The analysis of reliability by field data is very useful and we need to apply this method to other components, the correlation between field data and Lab Test has influence on satisfying the target of reliability.this method would be utilized for current mass production components and upcoming developed components. the reliability of durability should be continuously used in the basis of primary technique in cope with competitive automotive companies.

• 통상정보연구
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• 제12권4호
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• pp.279-302
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• 2010

A better selection model on management innovative enterprises is needed since the Korean government provides multi benefits to those selected enterprises. However, the selection model's propriety is suspicious because of the shortage of consideration of assessment items. In particular, the most important two assessment items, strategy and performance are suspected of multicollinearity because of high correlation scores. No consideration on multicollinearity among those items leads to erroneous selection which doubly counts the same components with different item names. The principle component analysis is applied to factor out the uncorrelated items. Using the resulted principle components, the new estimations are carried out. The comparison between estimated results from using principle components and non principle components shows that the present selection model overly considers the performance items compared to the real effect of items, which is a result of multicollinearity between performance and strategy.

• 한국과학교육학회지
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• 제37권2호
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• pp.291-299
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• 2017

이 연구에서는 예비 화학교사의 수행평가 개발 과정에서 나타나는 교과교육학 지식(PCK) 요소의 특징을 분석하였다. 예비교사 8명이 연구에 참여하였고, 이들은 수행평가 워크숍 후 구상 단계, 구체화 단계와 조별 논의 단계를 거쳐 수행평가를 개발하였다. 활동 과정에 대한 녹음 및 녹화와 반구조화된 면담을 실시하였다. 분석 결과, 개별적인 개발 단계에서 나타난 PCK 요소는 과학 평가에 관한 지식에 편중되어 있었다. 교육과정, 교수 전략, 학생에 관한 지식의 비중은 낮았으며 학생에게 제공되는 피드백도 고려되지 않았다. 구상 단계보다 구체화 단계에서 평가의 공정성과 객관성을 중시하는 전통적 평가 지향이 강하게 나타났다. PCK 요소 사이의 연계는 구상 단계에서 과학 교수 전략에 관한 지식을 중심으로 이루어졌다. 구체화 및 조별 논의 단계에서 PCK 요소 사이의 연계는 거의 나타나지 않았다. 조별 논의에서 나타난 PCK 요소의 특징은 구체화 단계와 유사하였다. 조별 논의를 통하여 예비교사들이 고려하지 못했던 일부 PCK 요소가 보완되었으나 논의가 주로 전통적 관점에서 이루어졌다.

• 한국정보처리학회논문지
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• 제4권8호
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• pp.1948-1960
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• 1997

소프트웨어를 재사용하는 경우 부품의 품질은 새로 개발한 시스템의 품질에 매우 큰 영향을 미친다. 따라서 재사용 라이브러리를 구성할 때 품질에 대한 평가와 검증은 필수적이다. 여러번 다시 사용하는 재사용 소프트웨어는 일반적인 일회적 소프트웨어에 대한 품질 평가와는 다른 기준으로 평가할 필요가 있다. 사용자 인터페이스나 기능적인 측면보다는 확장성과 정확성 등이 더욱 중요한 품질 요소가 된다. 본 논문은 멀티미디어 재사용 부품 저장소 및 재사용 시스템(Reusable Software for Multimedia Objects)의 일부인 객체 부품화 및 품질 평가 기술 개발에 관한 것으로 C++및 IDL(Interface Definition Language)로 표현된 재사용 부품을 읽어 구문 형식, 구조, 객체 결합도, 객체 응집도, 객체 복잡도, 이해도 등의 관점에서 분석하고 품질 만족도를 출력하는 품질평가 도구를 다루었다. 또한 분산 환경에서 품질 검증 시스템을 사용할 수 있도록 CORBA기반에서 설계하였다.

• 한국과학교육학회지
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• 제21권5호
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• pp.867-892
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• 2001

In both Korea and the U.S., science education leaders and specialists insist that there is a shortage of curricula to address the new national science education guidelines in support of reform. This paper addresses development of new curricula for science education reform in the hopes of facilitating further development of guideline-based curricula. We examine Korean and U.S. thematic-based (Korean Science Field Trip at Cultural Sites Program and U.S. Graduate Teaching Fellows in K-12 Education) and project-centered (Korean Teachers for Exciting Science and U.S. Foundational Approaches in Science Teaching Program) programs. Using the criteria of rationale for curriculum, content and scope, processes of implementation, and assessment strategies, we identify the curricular components that are common across four successful secondary science programs and determine which of these components address the national guidelines. Our findings indicate that common components of these four programs meet the expectations of the science guidelines being used to revamp science education in both countries. Therefore, these programs not only engage secondary students and teachers in practicing successful science education, but also lead to successful science education practices that can be incorporated in the future development of curriculum to support secondary science reform.