• 대한가정학회지
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• 제42권11호
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• pp.31-45
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• 2004

The purpose of this study was to provide basic information about the facility planning to reduce elderly isolation and to improve their rehabilitation ability. Four re%archers observed the using behavior of the elderly residents in the corridor and lounge of 5 facilities. The results of the study were as follows. The using rate of the lounge wis higher than that of the corridor since most of the elderly were controlled by the staffs at the lounge. The facility could decrease the crowd of the lounge by arranging the sofa at the corridor-especially surrounding the atrium. The use rate in the lounge was very dependent on the time of the day, because its use was influenced mainly by daily schedule, and this resoled in it being largely inactive most of the time. A counter plan is needed to encourage natural interaction among the elderly. Individual or small group activities are required in addition to the regular programs. Since the furniture arrangements_(sofas and tables) at the corridor could induce elderly isolation and inactivity, various equipments should be arranged for the self-controlled activities. The indirect participation in the regular activities, which are usually conducted in the lounge, should also be considered in the corridor so that the elderly could observe them at any places.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.280-281
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• 2011

Special Protection Scheme(SPS) that operates scenarios about faults beyond the normally protective action is wide system protection technology for the purpose of wide areas protection. Therefore, the SPS focuses on the improvement of the power supply capability by protecting the system rather than protecting the system equipments. Since the SPS requires emergency operation, the operation schedule is set up in advance by analyzing various scenarios. Since the SPS's action scheme uses generator tripping and is a classical method it is presently the most powerful one. However, as the setting of SPS is set to the most severe disturbance, the scheme tends to trip more generators than required to prevent fault propagation. It is highly likely that tripping generator units to prevent fault propagation would result in difficulty of system management and possibility of load shedding. Accordingly, it is desirable that generators are connected to the system within the range that ensures system stability and intelligent SPS is currently under development to solve the problem being stated. In this paper, as a part of developing the intelligent SPS, application of the fast-valving and braking resistor scheme to the generators is being proposed and analysed to reduce the number of tripped generators.

• 한국항행학회논문지
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• 제12권5호
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• pp.464-469
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• 2008

Serial 통신에는 RS-232C 통신과 같은 Un-balanced 방식과 RS-485/422통신과 같은 Balanced 통신 방식이 있다. 이 가운데 RS-485 통신의 경우는 통신의 거리가 길고 Balanced 방식에 의한 전송방식이기 때문에 RS-232에 비하여 데이터의 신뢰성이 매우 우수하므로 산업현장에 많이 사용되고 있다. 통상적으로는 하나의 통신선 위에서는 하나의 프로토콜을 이용하여 통신을 구현하는 것이 일반적인 방법이다. 본 연구에서는 RS-485 serial 전송의 Physical layer 위에 여러 가지 종류의 장비나 기기를 동시 연결하여 사용할 수 있도록, 다수의 통신 Protocol을 구현하는 방법을 실현하여 보고 성능을 검증하여 보고자 한다.

• 제어로봇시스템학회논문지
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• 제10권12호
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• pp.1287-1294
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• 2004

Automated container terminals have been being developed over the world for recent years and many countries are interested in it because the amount of containers exported or imported is rapidly increasing. The conventional container terminals were not designed to control this kind of heavily many containers. They would face many structural problems soon or later, although they have managed to do well so far. One of the most important things in developing automated container terminal is to develop the equipment able to handle many containers efficiently. Those are maybe automated transfer cranes, automatic guided vehicles, and automated quay-side cranes. The word 'automated' means the equipment is operated without drivers and those equipments are able to work without any interruption in working schedule. Through the researches on the conventional transfer cranes, we decided that the structure of the conventional transfer cranes is not efficient in automated container terminal and it's not possible to handle so many containers in limited time. Therefore we have been studying on the proper structure of the automated container crane for past several years and a new type of transfer crane has been developed. Design concept and control method of a new type of transfer crane had been presented in the previous paper: Part Ⅰ. Experimental features will be presented with a model transfer crane in this paper: Part Ⅱ.

• 한국건설관리학회논문집
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• 제3권4호
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• pp.93-103
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• 2002

철근공사는 거푸집공사와 더불어 건축물의 구조적 안정성과 내구성 및 공기에 가장 큰 영향을 미치고 있는 공사이다. 그러나 국내 철근 콘크리트 공사는 철근현장가공조립을 주로 하고있어 낮은 생산성을 갖고 있는 실정이다. 따라서 본 논문은 생산성 향상을 위해 철근현장가공조립 프로세스를 부가가치 생산성향상을 위한 낭비요소를 분석하였다. 낭비요소 분석은 비가치창출 작업으로 인해 발생하는 요소로 철근현장가공조립의 가치분석을 통해 부가가치를 극대화 하고자 하였다. 그 결과 가치창출작업들이 비가치창출 작업보다 월등히 적다는 것으로 분석되었다. 특히, 본 논문에서 낭비는 불필요한 작업 단계와 인력, 장비, 자재, 시간 등에서 낭비되고 있었다. 또한 흐름생산이 되지 않고, 과잉생산을 하고 있는 것으로 조사되었으며, 가치의 변화가 필요한 것으로 분석되었다. 본 논문에서는 부가가치 생산성 향상을 위해 프로세스 상에 내재되어 있는 낭비요소를 분석하여 부가가치를 창출하는 가치창출 작업을 최대화하고, 비 가치창출작업을 최소화하는데 목적이 있다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제6권3호
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• pp.311-318
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• 2000

본 연구는 복잡하고 다양한 반도체 웨이퍼 가공 (FAB) 공정의 전체적인 흐름을 컴퓨터 모델로 구축하고 이를 Device 단면도를 나타내는 프리젠테이션 툴과 연동시키는 교육 모델의 개발을 목적으로 하였다. 급변하는 세계 반도체 시장에서 국내 반도체 업체는 지속적인 기술 개발과 더불어 효율적인 생산관리에 대응할 수 있도록 하여 국제 경쟁력을 키워야 할 것이다. 따라서 본 연구에서 다루어진 공정의 흐름과 각 단위공정의 특성을 바탕으로 설립된 모델은 서울대학교 반도체 공동 연구소를 대상으로 구현되었으나 앞으로 생산 관리를 담당할 국내 반도체 업체들의 신입사원과 현장기술자의 질적 향상을 위한 시청각 교육용 자료로의 활용 시 상당한 효과를 거둘 것이라 예상된다. 이는 생산업체에 국한되어지는 것만은 아니며 반도체 공정에 관련된 대학 학과목에서도 활용되어지리라 생각된다. 또한 확장성과 변화에 유연한 모델을 개발함으로써 반도체 생산 업체들은 구성된 표준 모델을 이용하여 각 회사의 실정에 맞추어 자사에 대한 시뮬레이션을 손쉽게 수행함으로써 많은 교육 효과와 이에 따른 원가 절감의 효과까지 거둘 수 있을 것이다.

• 한국의료질향상학회지
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• 제5권2호
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• pp.176-189
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• 1998

This study was conducted to evaluate the subjective ideas about the determinants of quality in ambulatory care unit among outpatients and medical staff of a university hospital, and to compare the differences of the ideas, between patients themselves and hospital staff. A self-administered questionnaire survey was conducted covering 799 outpatients and 190 hospital staff in March, 1998. The questionnaire included general characteristics and 26 determinants of ambulatory care quality. The following are summaries of the findings: 1. Both of outpatients and hospital staff perceived, "Physician's knowledge" as the most important determinant of medical care quality. 2. In respect of 7 determinants related to physician's knowledge and skill, both outpatients and hospital staff perceived "physician's knowledge and skill" as important determinants. The scores of determinants such as, "Not doing unnecessary examinations", and "Assignment of adequate number of patients and duty schedule for the physician" were significantly different between outpatients and hospital staff. 3. In respect of 4 determinants related to doctor-patient relationship, both outpatients and hospital staff perceived "attention to patient's complaints" as the most important determinant. The scores related to the determinants such as "kindness of physician" and "explanation of treatment outcome" were significantly different between outpatients and hospital staff. 4. Among the amenities related determinants, "Modern facilities and equipments" were perceived as the most important determinant in both group. 5. In respect of 8 determinants related to non-financial accommodation, outpatients perceived, "Waiting hours for treatment" as the most important determinant, and hospital staff perceived, "Kindness of hospital staff". 6. In respect of 4 determinants related to financial accommodation, outpatients perceived, "Fare account of medical cost" as the most important determinant, and hospital staff perceived, "Increasing reimbursements". Further comprehensive research should be made on the evaluation of perceptions of medical care quality, both of outpatient and inpatient care, among patients and hospital staff. So good quality in medical care will be achieved based on clients' needs.

• 한국의료질향상학회지
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• 제7권2호
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• pp.244-261
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• 2000

Background : In order to cope with changes in the management environment at hospitals, increased interests are drawn in patient foodservice system on Continuous Quality Improvement Activity as the method of approaching a quality food service and effective management. Thus, as a part of this activity, this study was conducted to evaluate job flow improvement that was already performed and the results of that process at the dietetic department of a university hospital, focusing on improving management. Method : On February 15 of 1998. the dietetic department formed a job flow-improvement to decide on the priority of job flow improvement, and prepared specific action strategies and schedule of the priority: after a 5 month process period, job improvement achieved on June 15. 1998. Also, economic achievement of the task was evaluated through labor productivity analysis and cost-benefit analysis. Results : The patient food service system which was managed decentralized at the present hospital was centralized, some steps of the food service process were integrated, and quality of patient food was improved. Also, as a solution of the problems expected when conducting job flow improvement was made on food service equipments and utensils. The result of evaluating the job flow improvement that labor productivity improved by 18.2% compared to before the improvement and the result of the analysis of cost-benefit showed that Benefit-Cost (B/C) ratio was 2.22. showing financial merit on the investment. Conclusions : Continuous Quality Improvement Activity needs to be initiated and conducted in the future in various areas of hospital foodservice system in order to actively adopt to ever changing hospital management environment. In order to achieve this goal, many researches and more efforts need to be put in by people in charge of hospital food service management, and interests and support are needed from hospital policy makers.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2001년도 학술대회지
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• pp.416-421
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• 2001

국내 철근 콘크리트 공사는 철근현장가공조립을 주로 하고있는데 철근공사는 거푸집공사와 더불어 건축물의 구조적 안정성과 내구성 및 공기에 가장 큰 영향을 미치고 있는 공사이다. 이와 같은 철근현장가공조립의 프로세스를 린 생산원리를 적용하여 가치흐름분석을 하였다. 가치흐름분석은 가치분석과 가치흐름맵핑을 통해서 건설프로세스 상의 가치창출작업과 비 가치창출작업을 분석하였다 그 결과 비 가치창출 작업으로 인한 낭비로 많은 작업 단계와 인력, 장비, 자재, 시간 등이 낭비되고 있었다. 또한 밀어내기 생산(Push-driven Production)으로 과잉생산을 하는 등 생산의 낙후성이 조사되었다. 이러한 프로세스상의 문제점을 개선하기 위해 이 연구에서는 부가가치를 창출하는 가치창출 작업을 최대화하고, 비 가치창출작업을 최소화하여 낭비요소를 제거하는데 목적이 있다. 특히 진행간 재고를 최소화하여 흐름생산(Flow Production)과 당김생산(Pull-driven Production)이 될 수 있도록 하였다.

• 한국건설관리학회논문집
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• 제5권4호
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• pp.122-129
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• 2004

현재 대부분의 리모델링 현장은 시설에 대한 사전정보부족, 공간적인 제약과 같은 예상치 못한 현장조건. 작업범위의 변경 등으로 인해 촉박한 공사기간으로 추진되고 있으며, 이는 조악한 품질의 원인이 되고 있다. 또한 다소 복잡한 작업체계를 가지고 있어 기존시설의 운영일정과 공사일정과의 충돌로 인한 갑작스런 작업대기시간의 발생 등 효율적인 공정관리에도 많은 어려움이 뒤따른다. 따라서 본 연구에서는 실제 리모델링 사례를 통하여 현장관리 절차 및 사례현장에서 나타난 시공관리상 문제점의 개선과정을 통해 리모델링 공사현장의 효율적 관리방안을 제시하는 것을 목적으로 하였다. 관리방안의 수립을 위해 문헌을 통하여 관리상의 문제점을 도출하였고, 사례분석을 통해 공사단계별 현장관리절차, 관리사항을 파악하여 관리상 성공요인을 도출하고, 향후 리모델링 현장에서의 효율적 관리방안을 제시하였다.