• 대한산업공학회지
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• 제36권1호
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• pp.42-51
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• 2010

The semiconductor industry is highly capital and technology intensive. Technology advancement on circuit design and process improvement requires chip makers continuously to invest a new fabrication facility that costs more than 3 billion US dollars. Especially major semiconductor companies recently started to discuss 450mm fabrication substituting existing 300mm fabrication of which facilities were initiated to build in 1998. If the plan is consolidated, the yield of 450mm facility would be more than doubled compared to existing 300mm facility. In steps of this important investment, facility layout has been acknowledged as one of the most important factors to be competitive in the market. This research proposes a new concept of semiconductor facility layout using hexagonal floor plan and its compatible material flow pattern. The main objective of this proposal is to improve the productivity of the unified layout that has been popularly used to build existing facilities. In this research, practical characteristics of the semiconductor fabrication are taken into account to develop a new layout alternative based on the analysis of Chung and Tanchoco (2009). The performance of the proposed layout alternative is analyzed using computer simulation and the results show that the new layout alternative outperforms the existing layout alternative, unified layout. However, a few questions on space efficiency to the new alternative were raised in communication with industry practitioners. These questions are left for a future study.

• 방사성폐기물학회지
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• 제6권4호
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• pp.369-385
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• 2008

부지감시 및 조사의 목적은 운영 전, 운영중 및 폐쇄 후 단계에서 변화가 예상되는 주요 부지특성을 지속적으로 감시함으로써 방사성폐기물처분장의 성능평가 및 설계에 필요한 기초자료를 제공하는 것이다. 부지감시의 단계별 주요내용은 다음과 같다. 운영전 단계에는 부지의 적합성 평가 및 처분장 건설과 운영에 필요한 주요 부지특성을 감시하며, 운영 중 단계에는 안전하고 효율적인 운영과 환경에 미치는 영향을 판단하기 위하여 주변지역을 포함하여 주요 부지특성을 감시한다. 폐쇄 후 단계에는 처분장의 방사성 물질로 인한 영향을 사전에 예방하고, 처분장의 장기적 안전성을 위하여 필요한 주요 부지특성 항목을 감시한다.

• 항공우주기술
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• 제3권1호
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• pp.232-241
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• 2004

항공우주연구원에서는 KSLV용 추진기관 종합시험설비를 구축, 운영함으로써 발사체 추진기관의 각 구성품의 조립성 및 시스템 적합성을 검증하고, 연소시험을 포함한 각종 시험을 통해 구성품의 성능 확인 및 추진기관 시스템에 대한 종합적 인증(Qualification)을 하고자 한다. 아울러 발사 환경을 모사할 수 있어, 추진기관 구성품 및 시스템의 최종 환경시험이 가능할 뿐 아니라 발사시 추진기관의 성능을 예측할 수 있다. 본 논문에서는 상기 목적을 위해 구축되는 추진기관 종합시험 설비(Integrated Power Plant Test Facility)의 개념설계(Conceptual Design Analysis)과정을 통해 도출된 설계 개념을 정리하여 기술하고자 한다.

• Industrial Engineering and Management Systems
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• 제8권1호
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• pp.22-28
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• 2009

We consider facility layout problems, where mn facility units are assigned into mn cells. These cells are arranged into a rectangular pattern with m rows and n columns. In order to solve this cell type facility layout problem, many approximation algorithms with improved local search methods were studied because it was quite difficult to find exact optimum of such problem in case of large size problem. In this paper, new algorithms based on Simulated Annealing (SA) method with two neighborhood generation methods are proposed. The new neighborhood generation method adopts the exchanging operation of facility units in accordance with adjacent preference. For evaluating the performance of the neighborhood generation method, three algorithms, previous SA algorithm with random 2-opt neighborhood generation method, the SA-based algorithm with the new neighborhood generation method (SA1) and the SA-based algorithm with probabilistic selection of random 2-opt and the new neighborhood generation method (SA2), are developed and compared by experiment of solving same example problem. In case of numeric examples with problem type 1 (the optimum layout is given), SA1 algorithm could find excellent layout than other algorithms. However, in case of problem type 2 (random-prepared and optimum-unknown problem), SA2 was excellent more than other algorithms.

• 농촌계획
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• 제25권3호
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• pp.89-102
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• 2019

This study was conducted to investigate priority recognition of experts and related facility operators in establishing policies for revitalizing agro-healing services. After reviewing related studies, 5 policy division and 19 detailed sector were drawn, including improving accessibility, improving promotion and information provision method, improved public relations and information provision, diversification of facility and program, financial support, and expansion of expert and specialized institutions. A questionnaire survey was conducted on agro-healing experts, agro-healing facility operators, social welfare experts, and social welfare facility operators. The AHP analysis indicated that agro-healing experts and facility operators had the highest priority in the division of expansion of expert and specialized institutions, while social welfare experts and facility operators had the highest priority in financial support. The IPA analysis was conducted to identify the priority of each policy sector. Respondents recognized above normal importance to policy divisions, but were relatively aware of the importance of improving accessibility, with overall satisfaction level appearing to be moderate. The results of this study are expected to provide useful information for establishing agro-healing policies and for establishing effective strategies.

• 대한지역사회작업치료학회지
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• 제6권2호
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• pp.51-59
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• 2016

목적 : 본 연구에서는 규칙적인 재활체육 프로그램 참여에 따른 시설 거주 지적장애인들의 여가시간 사용과 여가활동 수행에 미치는 영향을 규명하여 시설 거주 지적장애인들의 여가시간 사용과 여가활동 수행에 대한 기초자료를 제공하는 데 그 목적이 있다. 연구방법 : 연구대상은 경기도 용인시 지적장애인 거주시설에서 거주하는 지적장애인 8명을 대상으로 하였으며, 2015년 09월 01일부터 11월 30일 까지 총 12주간 재활체육 프로그램을 실시하였다. 재활체육 프로그램으로 짐볼과 탄성밴드를 활용한 근력운동을 적용하였으며, 프로그램 참여에 따른 여가시간 사용의 변화를 조사하기 위해 매월 시간 조사표 기록에 따른 총시간, 운동 빈도를 조사하였고, 여가활동 수행에 미치는 영향을 분석하기 위해 프로그램 전, 후 캐나다작업수행측정(COPM)을 활용하여 동적 여가활동에서의 수행도와 만족도를 분석하였다. 수집된 자료는 SPSS ver.18.0으로 기술통계, 프리드만 검정(Friedman), 윌콕슨 부호순위 검정(Wilcoxon's Signed-Ranks Test)을 실시하였다. 결과 : 여가시간 사용의 분석 결과 총시간, 운동 빈도에서 프로그램 참여 후 통계적으로 유의미하게 지속적으로 증가하였으며, 여가활동 수행의 분석 결과 동적 여가활동에서의 수행도, 만족도에서 프로그램 참여 후 통계적으로 유의미하게 증가하였다. 결론 : 재활체육 프로그램의 참여가 대상자들의 여가시간 사용을 효과적으로 변화시킬 수 있는 긍정적인 요인으로 작용할 수 있어 시설에 거주하고 있는 지적장애인들에게 재활체육 프로그램의 참여는 필수적이다. 또한, 이러한 프로그램을 지속적으로 제공하고, 체계적으로 발전시키고 관리하여, 지적장애인들의 여가생활의 질을 높이고 시설 내 생활과 하루일과의 만족도를 높이는 데 기여할 수 있을 것이다.

• KIEAE Journal
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• 제11권6호
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• pp.43-51
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• 2011

This study aims to analyze on the change status in the project plan of the housing complex as evaluated through the Housing Performance Grading Indication System. This a a system for assessing quantitatively the comprehensive, unified performance of housing by an objective standard from the design stage since January 9, 2006. As housing is a composite with various performances, it is required necessary to objectively assess the various performances from the design stage for building better housing. Thus, this study analyzed the change status and objectively described objectively it centering on the construction and structure drawings for 12 items posted in the Facility Management System_(FMS) out of examples recognized by 2011 since the implementation of the system. The changes were analyzed though observing each performance item-specific characteristics and confirming the books approved for use. In various parts, such as the site area, landscape plan, plane plan for unit, supplementary welfare facility plan, finishing materials, window size and location, the project plan was changed. These changes may result in a grading change in of the performance items of the system. This study purpose is for it to be used as a basic resource required for future system development by supplementing the limitation of the design phase and then through playing a basic role for the assessment after completion.

• Nuclear Engineering and Technology
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• 제48권5호
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• pp.1083-1095
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• 2016

The design of Prototype Gen-IV Sodium-Cooled Fast Reactor (PGSFR) has been developed and the validation and verification (V&V) activities to demonstrate the system performance and safety are in progress. In this paper, the current status of test activities is described briefly and significant results are discussed. The large-scale sodium thermal-hydraulic test program, Sodium Test Loop for Safety Simulation and Assessment-1 (STELLA-1), produced satisfactory results, which were used for the computer codes V&V, and the performance test results of the model pump in sodiumshowed good agreement with those in water. The second phase of the STELLA program with the integral effect tests facility, STELLA-2, is in the detailed design stage of the design process. The sodium thermal-hydraulic experiment loop for finned-tube sodium-to-air heat exchanger performance test, the intermediate heat exchanger test facility, and the test facility for the reactor flow distribution are underway. Flow characteristics test in subchannels of a wire-wrapped rod bundle has been carried out for safety analysis in the core and the dynamic characteristic test of upper internal structure has been performed for the seismic analysis model for the PGSFR. The performance tests for control rod assemblies (CRAs) have been conducted for control rod drive mechanism driving parts and drop tests of the CRA under scram condition were performed. Finally, three types of inspection sensors under development for the safe operation of the PGSFR were explained with significant results.

• 한국해양공학회지
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• 제35권6호
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• pp.446-456
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• 2021

To build an environment facility of a large-scale ocean basin, various detailed reviews are required, but it is difficult to find data that introduces the related research or construction processes on the environment facility. The current generator facility for offshore structure safety evaluation tests should be implemented by rotating the water of the basin. However, when the water in the large basin rotates, relatively large flow irregularities may occur and the uniformity may not be adequate. In this paper, design and review were conducted to satisfy the performance goals of the DOEB through computational numerical analysis on the shape of the waterway and the flow straightening devices to form the current in the large tank. Based on this, the head loss, which decreases the flow rate when the large tank water rotates through the water channel, was estimated and used as the pump capacity (impeller) design data. The impeller of the DOEB current generator was designed through computational numerical analysis (CFD) based on the lift surface theory from the axial-type impeller shape for satisfying the head loss of the waterway and maximum current velocity. In order to confirm the performance of the designed impeller system, the flow rate and flow velocity performance were checked through factory test operation. And, after installing DOEB, the current flow rate and velocity performance were reviewed compare with the original design target values. Finally, by measuring the current velocity of the test area in DOEB formed through the current generator, the spatial current distribution characteristics in the test area were analyzed. Through the analysis of the current distribution characteristics of the DOEB test area, it was confirmed that the realization of the maximum current velocity and the average flow velocity distribution, the main performance goals in the waterway design process, were satisfied.

• 한국산림과학회지
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• 제95권4호
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• pp.459-467
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• 2006

본 연구의 목적은 자연휴양림 매력물의 기대불일치가 이용만족도에 미치는 영향을 규명하는 것이다. 자연휴양림의 자원과 시설, 기대불일치, 이용만족도에 관한 이론적 고찰을 통해 자연휴양림의 매력물을 도출하고 개념적 틀을 설정하였다. 본 연구의 자료는 2004년 여름철에 3개의 자연휴양림 이용자 415명을 대상으로 한 설문조사를 통해 수집되었다. 분석결과, 1) 각 매력물 중 이용자 흥미자원의 기대도와 성취도 수준이 가장 높았다. 2) 자연휴양림 매력물에 대한 기대도와 성취도간에는 1% 유의 수준에서 통계적 차이가 있었다. 3) 기대불일치가 가장 심한 매력물은 안전시설이었으며, 기대불일치가 적은 매력물은 생물적 자원(식물)으로 나타났다 4) 이용만족도는 매력물의 기대불일치가 클수록 낮아지는 것으로 평가되었다. 5) 다변량 분석결과, 물리적 자원, 사회문화적 자원, 숙박시설, 기반시설, 안전시설, 위생시설, 교육시설의 기대불일치가 1% 유의수준에서 이용만족도에 영향을 미치는 변수로 규명되었으며, 매력물 중 이용만족도의 값의 변화에 가장 큰 영향을 미치는 변수는 기반시설의 기대불일치인 것으로 평가되었다.