• 한국국방경영분석학회지
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• 제36권1호
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• pp.77-90
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• 2010

상용품목을 군용환경에서 적용하면 저비용, 빠른 조달시간, 기술적 발전 등 여러 가지 이점이 있다. 반면에 상용 제품, 표준, 관행 등이 군용 요구조건에 미달됨으로 인하여 신뢰도 및 병참 상의 문제가 발생할 수도 있다. 또한 상용 공급자들은 군용 병참을 지원하는데 필요한 기술적 자료를 제공한 경험이 거의 없을 수도 있다. 보다 많은 회사들이 제품 관련 데이터 수집 시스템을 구축하고 있어 상당한 분량의 사용현장 보증 데이터가 수집되었다. 사용현장 데이터는 전형적으로 주기별 판매량과 클레임 건수로 구성된다. 본 연구에서는 군용환경에서 작동하는 군용설비, 군용환경에서 작동하는 상용설비, 상용환경에서 작동하는 상용설비 등 세 가지 유형의 데이터를 고려하였다. 최대우도 기준 및 최소제곱 기준에 기초한 제품 신뢰도 추정 방법을 제안하고, 각 유형의 데이터에 대한 추정 모형을 구축하고 상용환경에서 군용환경으로 전환하는 신뢰도 변환방법을 제안하였다. 사례연구를 통하여 제안된 방법의 적용 가능성을 검증하였다.

• 한국컴퓨터정보학회논문지
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• 제22권9호
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• pp.155-161
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• 2017

As the e-marketplace becomes the core of management activities, researches on motivation, transaction type, strategy, satisfaction, risk management, performance evaluation, etc. have been actively studied, but the factors influencing actual utilization have not been fully. Especially, the factors that affect the intention of the users are limited without consideration of internal environment, external environment, e-marketplace characteristics such as operating rules, characteristics of the company to be used. In order to derive the determinants of B2B e-marketplace use, this study was conducted to examine the relationship between internal environment, external environment, e-marketplace characteristics as independent variables, intention of use as dependent variable, participation qualification, The results were as follows. First, the previous study limited the determinants of intention to use to either internal or external, but this study presented an integrated model that considers both factors. Second, the characteristics of companies participating in e-marketplace were identified by using participation qualification and activity scope as control variables.

• Asia pacific journal of information systems
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• 제9권3호
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• pp.127-142
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• 1999

There have been strong arguments that the best organizational type for the information society is a network organization which is intelligent and learning-oriented as well as has problem solving capacities rather than a traditional passive organization which strictly follows standard operating procedures. In this perspective, integrated information work environment emerges as attractive work environment for the 21st century. Integrated information work environment is defined as an integrated electronic environment that is available to and readily accessible be each employee and is structured to provide immediate, individualized on-line access to the full range of information, software, guidance, advice and assistance, data, images, tools, and assessment and monitoring systems to permit job performance with minimal support and intervention by others. Case study was performed to measure the productivity improvement by implementing integrated information work environment in life insurance company. The results show that there is a number of indications of strong work productivity improvements.

• 간호행정학회지
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• 제9권2호
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• pp.193-203
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• 2003

Purpose : The purpose of this study was to develop the Operating Room Nursing Malpractice Scale and to test reliability and validity of the instrument and to describe frequency of malpractice. Method : The subjects used to verify the Scale's reliability and validity were 179 nurses who working at 3 university hospital and 6 general hospital in Busan and Kyoung nam province from september 1 to October 10, 2002. The data was analyzed by the SPSS/ WIN 10.0 program. Result : The factor analysis classified a total 5 factors statistically, it's communality was 44.18%. Item content are as follows. The factor were 'malpractice in the patient's preparation', 'malpractice in nursing technique', 'malpractice in the management of the environment', 'malpractice of the patient's security', 'malpractice in the supervision of the patient'. The most frequent malpractice was 'The patient complained of waiting for a long time to go back from the operating room because of inadequate communication with another department'. Conclusion : The scale of operating room nursing malpractice was to prevent the severe nursing accident and to provide the basis of needs of educational program.

• Journal of Electrical Engineering and Technology
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• 제12권1호
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• pp.249-255
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• 2017

Efficient operation of induction motor at light loads has been getting wide attention recently because the operating of induction motor at light loads occupies big portion of its operating regions in many applications such as environment friendly vehicle. As one of approaches to improve efficiency, Adaptive Maximum Torque Per Amp (Adaptive MTPA) control for induction motor drives has been proposed to achieve a desired torque with the minimum possible stator current. However, the Adaptive MTPA control was validated only at heavy load where, in general, control scheme tends to perform better than at light loads since the error in measurement of sensors is lower and signal to noise is better. Thus, although the performance of a control scheme is good at rated operating point, its performance at light load is somewhat in doubt in practice. This has led to considerable interest in efficiency of Adaptive MTPA control at light loads. This work experimentally demonstrates performance of Adaptive MTPA control at light loads regardless of rotor resistance variation, thus showing its good performance over all operating conditions.

• 한국정밀공학회지
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• 제20권1호
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• pp.107-117
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• 2003

Polishing a die that has free-form surfaces is a time-consuming and tedious job, and requires a considerable amount of high-precision skill. In order to reduce the polishing time and cope with the shortage of skilled workers, an automatic polishing robot system was developed. The polishing robot system is composed of two subsystems, a three-axis machining center and a two-axis polishing head. The machining center is controlled by a FANUC controller, and the polishing head by DSP controller. The system has five degrees of freedom and is able to keep the polishing tool normal to the die surface during operation. To easily operate the developed polishing robot system, this study developed an integrated operating program in the Windows environment. The program consists of five modules: a polishing data generation module, a code separation module, a polishing module, a graphic simulator module, and a teaching module. And, the automatic teaching system was developed to easily obtain teaching data and it consists of a three dimensional joystick and a proximity sensor. Also, to evaluate the performance of the integrated operating program and the polishing robot system, polishing experiments of a die of shadow mask were carried out.

• 한국환경과학회지
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• 제16권1호
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• pp.45-53
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• 2007

This study was carried out to investigate the variation of organic, nitrogen and phosphorus in $(AO)_2$ SBBR process according to the variation of operating cycle at the high TOC concentration. The operation time in anoxic (anaerobic) time to oxic time was 1:1. Three lab-scale SBBRS were fed with synthetic wastewater based on glucose as carbon source, The variation of total TOC removal was similar each other irrespective of operation time, however, the TOC concentrations in SBBRs showed a little difference according to the operating condition. In SBBR, complete nitrification was not occurred at all reactors, however, R3 showed a higher nitrification than R2. And in SBBR, the variation of operating time more affected at phosphorus removal than nitrogen removal. R2 which had the shortest time at the 1st aeration time showed the lowest phosphorus release and uptake efficacy.

• International Journal of Precision Engineering and Manufacturing
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• 제5권3호
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• pp.69-76
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• 2004

Polishing a die that has free-form surfaces is a time-consuming and tedious job, and requires a considerable amount of high-precision skill. In order to reduce the polishing time and cope with the shortage of skilled workers, an automatic polishing robot system was developed. The polishing robot system is composed of two subsystems, a three-axis machining center and a two-axis polishing head. The machining center is controlled by a FANUC controller, and the polishing head by DSP controller. The system has five degrees of freedom and is able to keep the polishing tool normal to the die surface during operation. To easily operate the developed polishing robot system, this study developed an integrated operating program in the Windows environment. The program consists of five modules: a polishing data generation module, a code separation module, a polishing module, a graphic simulator module, and a teaching module. Also, the automatic teaching system was developed to easily obtain teaching data and it consists of a three dimensional joystick and a proximity sensor. Also, to evaluate the performance of the integrated operating program and the polishing robot system, polishing experiments of a die of shadow mask were carried out.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2014년도 추계학술대회
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• pp.167-168
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• 2014

연안여객선은 도서민의 감소로 인한 경영수지악화로 신규선 투입과 운항 횟수 증가와 같은 서비스 개선을 기대하기 어렵다. 또한 안전관리의 미흡과 낮은 임금 및 근로 환경의 문제로 우수 선원의 수급이 어려워 선박 운항의 안전성 또한 문제가 되고 있다. 공공성과 안전성 확보를 위해 공영제를 도입한 운영체계 개선이 필요하다. 여러 현실적 제약이 있지만 보조항로부터 시행하면서 안전관리 강화 등을 통해 부실한 업체의 면허를 회수해 공영항로를 확보해 간다면 공영제를 통한 운영체계 개선이 가능할 것이다.

• 한국정보통신학회논문지
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• 제20권9호
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• pp.1696-1703
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• 2016

본 논문에서는 현재 해양수산부에서 운영 중인 NDGPS 기준국을 SBAS 기준국으로 공동 활용하기 위한 목적으로 사이트 환경 관점에서의 타당성을 확인한다. 이를 위하여 SBAS 기준국의 사이트 환경 요구사항을 도출하고, 본 요구사항을 확인할 수 있는 절차를 수립한다. 그리고 수립된 기준국 사이트 환경 조사 절차를 기반으로 NDGPS 기준국의 현장 조사를 실시하고 그 결과를 분석한다. 이때, 사이트 환경 조사를 위한 사이트 선정은 NDGPS 기준국 17개소를 대상으로 한다. 본 논문의 내용은 NDGPS 기준국을 SBAS 기준국으로 공동 활용하기 위하여 고려해야 할 요소도출 및 위성항법시스템 분야의 기준국 선정 및 구축 시 활용할 수 있다.