• Nuclear Engineering and Technology
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• 제56권1호
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• pp.309-316
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• 2024

The U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide (RG) 1.20 provides guidance on the comprehensive vibration assessment program (CVAP) to be performed on reactor internals during preoperational and startup tests. The purpose of the program is to identify loads that could cause vibration in the reactor internals and to ensure that these vibrations do not affect their structural integrity. The structural vibrational analysis program involves creating finite element analysis models of the reactor internals and calculating their structural responses when subjected to vibration loads. The appropriateness of the structural analysis methodology must be demonstrated through benchmarks or any other reasonable means. Although existing structural analysis methodologies have been proven to be appropriate and are widely used, this paper presents the development of an improved new structural analysis methodology for APR1400 reactor internals using scaled model tests.

• 산업경영시스템학회지
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• 제35권2호
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• pp.71-79
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• 2012

In this paper, an evaluation of a product replacement ratio of irreparable items to the normally working ones is performed with a view to a warranty analysis. It is demonstrated that the replacement ratio during the warranty period can be estimated from the field data collected during the period of operation, and one can provide the management with a useful information regarding the appropriateness for the warranty period, which is vital to the product marketing strategy. Although warranty data usually take the form of multiply right censored interval data, the conventional reliability analysis method seems to be good enough as in this case. More sophisticated method such as warranty cost analysis and 2-dimensional warranty analysis is yet desired.

• 한국산업융합학회 논문집
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• 제23권6_2호
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• pp.1033-1042
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• 2020

Shale shaker which is one of the mud circulation systems is composed of a basket, a vibrator and a screen. Its purpose of a shale shaker is to induce drilling fluid to flow through a screen, transport solids across a screen surface, and discharge solids off the end of the screen. The new shale shaker for the on-shore drilling system is designed to be smaller than the original shale shaker which has the same capacity with the new on to enable to transport and to operate on the trailer. In this study, structural and vibrational analysis of shale shaker was carried out to evaluate the appropriateness of the design in terms of the structural stability.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 A
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• pp.164-166
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• 1999

In this study, dynamic analysis of Linear DC motor has been performed. Dynamic characteristic is carried out from coupling the electrical circuit equation and mechanical kinetic equation. Trust constant and circuit parameters are obtained by FE analysis and static characteristic experiment. From the previous results, dynamic analysis is performed and the appropriateness of analysed result is verified by comparing with experimental result.

• 정보교육학회논문지
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• 제20권6호
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• pp.617-628
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• 2016

초등학교에서의 정보과 교육과정에서의 정보, 정보기기, 운영체제 교육을 위해 국내외 교육과정의 내용체계 등의 선행연구 자료들을 비교 및 분석하여 새로운 개선 및 시사점을 고찰하였다. 그리고 이 내용에 선정에 대한 필요성과 교육 시기, 내용 선정의 적합성을 전문가들을 대상으로 설문하였고, 그 연구결과로 초등학교에서 정보, 정보기기, 운영체제 교육을 위한 교육 내용을 선정하고 성취기준을 마련하여 제안한다. 본 연구 결과는 국가 수준의 초등 정보과 교육과정 개발 및 초등학생들의 핵심 교육역량을 양성하는 것으로 이용할 수 있다. 본 논문은 일부 전문가들을 대상으로 조사한 결과를 분석의 근거로 삼았다는 점에서 결과를 일반화하는 데에는 한계가 있다. 그럼에도 불구하고 초등 정보과 교육과정 영역 내용 성취기준의 적합성 분석을 세부적으로 시도한다는 점과 이를 통해 초등 정보과 교육과정의 안정적인 운영과 초등 정보과 교육과정의 개선에 필요한 정보를 제공한다는 점에서 의의를 찾을 수 있다.

• 한국의료질향상학회지
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• 제5권1호
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• pp.152-165
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• 1998

Background : In this paper patient outcomes research is going to be reviewed and described, to be compared with relevant studies, and to consider the application in Korea. Methods : We compiled and reviewed the articles and materials related to patient outcomes research especially by PORT(Patient Outcomes Research Team) and rearranged them for seeking the main point and comparing with relevant studies. Results : Patient outcomes research emphasizes patient outcomes as well as conventional clinical outcomes. It is prospective study observing effectiveness in real situation instead of efficacy in ideal condition. Patient outcomes research comprises of 6 fields ; literature review and meta-analysis, use of claims data, decision modeling, outcomes assessment, cost of care, dissemination of research findings. SAA(small-area variations analysis), appropriateness study and clinical practice guideline are connected with patient outcomes research. Conclusion : In view of the fact that current medical policy in Korea is shifting its focus from accessibility to the improvement in quality and cost containment, and is stressing patient-based research, patient outcomes research is one direction for which the medicine is accountable and assessable. Considering that the number of patient receiving medical treatment in Korea is higher than the West, patient outcomes research has competitive power as against the West.

• 기술혁신학회지
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• 제16권1호
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• pp.303-322
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• 2013

혁신형 중소기업 기술금융의 지속적인 확대와 발전을 위해서 기술금융 지원사업의 적절성이 요구된다. 본 연구에서 기술금융 수혜기업의 선정이 사업 목적과 취지에 적합한지 여부를 실증 분석하였다. 기술금융 여신이 발생될 확률은 기술력등급이 높을수록, 영업이익률이 높을수록 증가하는 것으로 나타났다. 반면에 자본금과 업력이 증가할수록 기술금융 여신 승인이 발생될 확률은 점진적으로 감소하는 것으로 나타났다. 로지스틱 분석결과 기술력 등급과 기업의 주요 특성이 기술금융 수혜기업 선정에 유의한 영향을 미친 것으로 나타났다. 그러나 모형의 적합성인 정분류율이 높지 않기 때문에, 기술금융의 적절성을 높이기 위한 개선을 제안하였다. 그리고 회귀분석 결과 대출금 규모와 기술력 등급사이에 연관성은 유의하지 않게 나타났다. 본 연구결과와 제안은 기술금융 결정의 적절성과 신뢰성을 확보하는 데 기여할 것이다.

• 한국실내디자인학회논문집
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• 제18권6호
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• pp.60-68
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• 2009

Cheoungju International Craft Biennale is not just an art exhibition but more like a pubic festival which is including an experiential learning and a public participation section as well as a special exhibition and an international competition section. Thus it is strongly required to present an appropriate meaning and mood corresponding to each exhibition hall. The paper has examined the exhibition topics during the last 10 years and the plannings and contents to install the exhibition hall according the yearly topic and it has analyzed the comprehensive evaluations after the exhibition. The research scope is limited to the part related to the exhibition hall and facilities, which is including calculation of dimensions and layout, access and movement system, the appropriateness of the design and construction period, measure of applied technology appropriateness, post management as well as planning intent, estimation of the number of the visitors, preliminaries. With the results shown in the comprehensive evaluation and analysis, the paper has presented two issues, the one related to the procensure and preparation and the other related to the facilities. It is showed that both problems are due to the lack of expertise and it is necessary for the experts to participate from the first step of the procedure including planning for the successful exhibition. For the appropriate exhibition hall corresponding to the exhibition planning and scale, it is required to have the professional considerations of successful space and visitor's movement management, display environment, construction method, and post management. The study presents that architectural and interior design have to take an active part in constructing exhibition design in overall stage including the initial, practice, and evaluation stage.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2008년도 추계 학술발표회
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• pp.176-183
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• 2008

This paper highlights the importance of carrying out global slope stability analysis as part of design calculations for geosynethetic walls in tiered configuration. Four design case histories were selected to examine the appropriateness of their design by performing additional slope stability analyses using the shear strength reduction method with in the frame work of finite element analysis. The results indicated that all of the walls examined, which were designed to meet the current design guide lines, did not satisfy the global slope stability requirement, and that longer reinforcements are required in the upper tiers to achieve the minimum factor of safety. Practical implications of the findings are discussed.

• 대한임베디드공학회논문지
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• 제17권3호
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• pp.157-165
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• 2022

As the number of the installed escalators in Korea continues to increase, the accident rate is also increasing. Therefore, it would be necessary to proactively secure safety. PESSRAE is a controller that implements safety functions as electric/electronic/programmable electronic devices to respond to risks that may occur in escalators. Safety Integrity Level (SIL) is assigned to the safety functions of PESSRAE and it must be verified that the quantitative target value according to the SIL level is satisfied. In this paper, the initial PESSRAE is analyzed using the FMEDA (Failure Mode, Effects and Diagnostic Analysis), which is a quantitative safety analysis method, and design improvement specifications are derived from the analysis in order to satisfy the quantitative target values. Based on the derived design specifications, the improved PESSRAE controller was manufactured. And the appropriateness of the design was verified experimentally in a testbed environment simulating the real environment.