• 대한교통학회지
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• 제27권6호
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• pp.167-176
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• 2009

교통수요관리(travel demand management)는 통행수요를 적절히 제어함으로서 교통혼잡을 최소화시키려는 목적으로 시행되는 제반 교통정책이라 할 수 있다. 교통수요를 적절히 관리하기 위해서는 먼저, 정책목표를 설정하고 이를 달성할 수 있는 최적의 정책변수들을 찾아야 하는데, 현재 이에 대한 연구는 미흡한 실정이다. 이런 측면에서 본 연구는 설정된 정책목표를 달성하기 위한 교통수요관리모형과 이를 풀기 위한 알고리듬을 제시한다. 교통수요관리모형은 2가지로 개발되는데, 첫 번째 모형은, 기점과 종점간 평균 통행시간을 대상으로 목표치를 설정한 후 이 목표치를 달성하기 위한 적정 통행수요를 구하는 문제이며, 두 번째 모형은 혼잡이 심한 특정한 지역을 대상으로 해당지역에 포함된 링크의 교통량/용량비가 일정한 목표수준을 유지되도록 하는 최적 통행수요를 구하는 문제이다. 간단한 예제 교통망을 대상으로 본 연구에서 제시한 모형들을 평가한다.

• 대한안전경영과학회지
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• 제12권3호
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• pp.321-326
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• 2010

Government evaluate annually a performance of government's R&D(Research & Development) and decide a budget and progress. So, a performance target setting of R&D is very important at the planning, The basic performance target setting of railroad R&D is clear. However, a scientific and technological performance target setting of railroad R&D is very difficult and a reasonable level of it can not be judged. Therefore, this study will suggest a solution for a scientific and technological performance target setting of railroad R&D through regression analysis of successfully finished railroad R&D, after judging a reasonability of a scientific and technological performance through comparing railroad R&D with the other R&D.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2004년도 춘계공동학술대회 논문집
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• pp.441-445
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• 2004

In this paper, we deal with an inventory model of a multi-stage, serial supply chain system where a single product type and nonstationary customer demand pattern are considered. The retailer and suppliers place their orders according to an echelon-stock based replenishment control policy. We assume that the suppliers can access online information on the demand history and use this information when making their replenishment decisions. Using a reinforcement learning technique, the inventory control parameters are designed to adaptively change as the customer demand pattern is altered, in order to maintain a given target service level. Through a simulation based experiment, we verified that our approach is good for maintaining the target service level.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 추계학술대회
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• pp.145-152
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• 2008

Single PPM Quality Innovation Movement is originally developed quality program in Korea for supplier's quality level-up since 1995. The quality target is below the 10ppm(parts per million) in outgoing quality and delivered goods plus field claim. This Single PPM Quality Innovation Movement program was conducted to realize the anticipated results not only due to management result level's increasing, but also the company's confidence and competitiveness. This study attempted to find the mutual influences on the participation of the constituent members, satisfaction of the constituent members and results of the management from Single PPM Quality Innovation Movement. The reliance analysis for the measurement material on the questionnaire was verified by Cronbach's alpha coefficient. Participation of the constituent members, satisfaction of the constituent member and result of the management, the influences upon Single PPM improvement degree level were verified through the structural analysis by using SPSS statistic package. The influence evaluation among the groups was evaluated by the structure equation.

• 보건행정학회지
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• 제28권2호
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• pp.186-193
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• 2018

Background: The aim of our study was to review the findings of health insurance fraud investigations and to evaluate their impacts on medical costs for target and non-target organizations. An interrupted time series study design using generalized estimation equations was used to evaluate changes in cost following fraud investigations. Methods: We used National Health Insurance claims data from 2009 to 2015, which included 20,625 medical institutions (1,614 target organizations and 19,011 non-target organizations). Outcome variable included cost change after fraud investigation. Results: Following the initiation of fraud investigations, we found statistically significant reductions in cost level for target organizations (-1.40%, p<0.001). In addition, a reduction in cost trend change per month was found for both target organizations and non-target organizations after fraud investigation (target organizations, -0.33%; non-target organizations of same region, -0.19%; non-target organizations of other regions, -0.17%). Conclusion: This study suggested that fraud investigations are associated with cost reduction in target organization. We also found similar effects of fraud investigations on health expenditure for non-target organizations located in the same region and in different regions. Our finding suggests that fraud investigations are important in controlling the growth of health expenditure. To maximize the effects of fraud investigation on the growth of health expenditure, more organizations needed to be considered as target organizations.

• 대한인간공학회지
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• 제28권4호
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• pp.71-76
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• 2009

Effects of dark adaptation have large safety implications. This study was aimed to investigate the effects of varying illuminance and the size of critical detail on visual performance (i.e., time-to-detect) in a dark room environment. While adapting to the dark environment, ten subjects were asked to detect and answer simple numerical expressions under 9 experimental conditions (3 illuminance level $\times$ 3 target size). The ANOVA results revealed that the time-to-detect was significantly affected by both of the illumination level and the size of critical detail. As illumination increased from 10 lux to 20 lux, the time-to-detect was significantly declined. For the size of critical detail, 0.5/min size (i.e., equal to 2 minutes of visual angle) resulted in a shorter time-to-detect, as compared to 0.7/min size (i.e., equal to 1.6 minutes of visual angle). Potential applications of this research include the development of design guidelines for illumination and warning signs in poorly illuminated viewing environments.

• 수산해양기술연구
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• 제49권4호
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• pp.459-468
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• 2013

In the application of the ecosystem-based fisheries assessment Jeonnam marine ranching ecosystem, two fisheries, funnel fishery and trap fishery, were selected as target fisheries. Black seabream, Acanthopagru schlegelii, rock bream, Sebastes inermis, gray mullet, Mugil cephalus, were selected as target species for the funnel fishery, and conger eel, Conger myriaster, was target species for the trap fishery. For assessing indicators of four management objectives, that is the maintenance of sustainability, biodiversity, habitat quality and socio-economic benefits, indicators were selected considering the availability of data, which were 5 indicators for sustainability, 3 indicators for biodiversity, 4 indicators for habitat, 2 indicators for socio-economic benefit. The Objective risk indices for sustainability and biodiversity of two fisheries were estimated at yellow zone, medium risk level. The objective risk indices for habitat and socio-economic benefit were estimated at green zone, safe level. The species risk indices (SRI) were estimated at yellow zone. The fishery risk indices (FRIs) were estimated at 1.143 and 1.400 for funnel net fishery and trap fishery, respectively. Finally the ecosystem risk index estimated at 1.184.

• 한국건설관리학회논문집
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• 제10권6호
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• pp.28-39
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• 2009

최근 빠르게 변화하는 환경속에서 지속적인 프로세스의 개선과 모니터링을 통하여 민첩성과 적응력을 확보할 수 있는 프로세스 경영기법으로 BPM(Business Process Management)이 대두되고 있다. 건설기업에서 BPM을 도입하기 위해서는 도입목적에 따른 BPM도입 절차를 수립하고, BPA(Business Process Architecture)를 통하여 정의된 기업의 업무 구조에 따라 평가척도를 정의하여 업무를 평가하고, 이를 통하여 BPM도입 대상 업무를 선정해야 한다. 이러한 BPM도입 대상 업무는 기업의 전략과 밀접한 관계를 가지고, 기업의 가치실현을 지원해야 한다. 따라서 본 연구는 건설기업의 효과적인 BPM도입을 위하여, 건설기업 실무자의 설문조사를 통하여 건설기업별 BPM도입 대상 업무 선정 현황을 살펴보고, 그 유형을 분석하여 기업의 핵심 전략과 BPM도입 대상 선정업무의 상관관계를 살펴봄으로써 건설기업의 BPM도입 대상유형에 따른 기업의 전략이 어떻게 다른지를 살펴보고자 한다. 또한 건설기업이 BPM을 도입할 때 각 기업의 대상 선정의 현황과 전략을 조사함으로서 건설기업의 BPM도입을 위한 대상 업무 선정에 도움을 주고자 한다.

• 품질경영학회지
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• 제9권2호
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• pp.26-30
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• 1981

A typical industrial data - monitoring scheme often requires trend detection Trend detection can be accomplished in many ways. Common statistical methods are the sign test, the run test, and the trend test. Graphical methods include various smoothing schemes and the cusum. The cusum has established itself as an efficient method of detecting changes in the mean level of a process being monitored. The cusum requires a "target value" with which the raw data are compared. At production start - up it is often difficult to designate the target value. This paper offers a means of initiating the cusum technique without a target value.

• 한국심리학회지ㆍ건강
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• 제19권4호
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• pp.929-955
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• 2014

본 연구에서는 대학에서 개설된 자기관리 수업이 첫째, 수강생들의 목표행동의 개선과 충동성 감소에 효과적인지 확인하고, 둘째, 목표로 하지 않았던 행동에도 긍정적인 영향을 미치는지(일반화)를 목표행동 유형(운동, 식습관, 학습, 긴장습관, 기타 행동)에 따라 살펴보았다. 마지막으로 이러한 변화가 충동성의 감소로 인해 발생했는지를 조사하였다. 본 연구의 참가자는 한 대학교에서 자기관리 수업을 수강하면서 행동수정 프로젝트를 수행한 128명이었다. 수강생들은 학기 초와 학기 말에 자기보고식 충동성 척도와 충동성 측정 행동과제인 지연 디스카운팅 과제(delay discounting task), 그리고 음주, 운동, 식습관, 학습, 시간관리 분야에서의 자기통제력을 측정하는 일반적 자기통제행동 척도에 응답하였다. 그리고 수강생들은 한 학기 동안 목표행동을 정하고 행동수정 프로젝트를 통해 자신의 행동 변화를 직접 관찰하고 기록하였다. 연구 결과, 수강생의 63%가 자기관리 수업을 통해 성공적으로 목표행동을 달성하였다. 그리고 목표행동에 따라 차이는 있었으나 목표행동을 달성한 집단은 다양한 분야의 자기통제행동의 향상과 충동성의 유의한 감소를 보고하였다. 다음으로, 적어도 운동과 식습관 집단에서의 충동성의 감소는 자기통제의 일반화를 유의하게 예측하였다. 이러한 결과는 충동성의 향상이 다양한 자기통제행동의 개선으로 이어짐을 보여주며, 자기통제력의 일반화를 시사한다. 이와 같은 의의와 더불어 한계점 및 후속 연구를 위한 제언을 논의하였다.