• 대한안전경영과학회지
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• 제19권3호
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• pp.137-150
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• 2017

Logistic enterprises want to be competitive enterprises in fierce logistic market and worry about the securement of discriminative competitiveness for it. The standards for the judgement of logistic industry's maintenance of competitiveness are not only economic feasibility of logistic costs but also the satisfaction of users because well-established service system for variety and enhancement of logistic needs. Some of the quality attributes sufficiently satisfy expectation of customers, but not guarantee high-quality satisfaction. Therefore, it's difficult to grasp quality attributes with the existing approach of perceived service quality. Quality attribute model suggested by Kano is widely used as the concept is accurate, there is high possibility to be used at the stage of product/service planning, and it can be easily applied. Kano model has a limitation that quality attributes are classified with mode and the differences between strong property of the quality attribute and week property in quality attributes were ignored. Therefore, Timko calculated customer satisfaction coefficient with the result of Kano's survey and effects of customer satisfaction and unsatisfaction through relations between satisfaction coefficient and unsatisfaction coefficient. The purposes of this study are to use ASC, the average of satisfaction coefficient and unsatisfaction, as the satisfaction of quality characteristics, decide the importance of quality characteristics with TOPSIS, a representative multi-standard decision-making method, and calculate strategy improvement propriety of logistic service quality.

• 한국군사과학기술학회지
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• 제19권1호
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• pp.57-65
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• 2016

Threat evaluation is a process to estimate the threat score which enemy aerial threat poses to defended assets. The objective of threat evaluation is concerned with making an engagement priority list for optimal weapon allocation. Traditionally, the threat evaluation of massive air threats has been carried out by air defence experts, but the human decision making is less effective in real aerial attack situations with massive enemy fighters. Therefore, automation to enhance the speed and efficiency of the human operation is required. The automatic threat evaluation by air defense experts who will perform multi-variable judgment needs formal models to accurately quantify their linguistic evaluation of threat level. In this paper we propose a threat evaluation model by using a fuzzy rule-based inference method. Fuzzy inference is an appropriate method for quantifying threat level and integrating various threat attribute information. The performance of the model has been tested with a simulation that reflected real air threat situation and it has been verified that the proposed model was better than two conventional threat evaluation models.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2011년도 학술발표회
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• pp.109-113
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• 2011

수자원사업은 합리적이고 신뢰성 있는 의사결정이 필요한데 그동안 주로 경제성분석에 의존하여 왔다. 본 연구는 경제성분석위주의 기존 방법을 탈피하여 사업 필요성과 투자 타당성을 다양한 각도로 평가할 수 있는 합리적이고 객관적인 수자원사업 대안선정과 투자우선순위결정 방법을 도출하고자 하였다. 이를 위해, 대안 간에 동일한 기준으로 종합평가점수를 산정하여 우선순위를 결정할 수 있도록 다기준의사결정모형을 개발하였다. 적용결과는 취약성 기준에 큰 영향을 받으며, 정책적 기준, 경제성 기준의 순으로 분석되었다. 이는 전문가 설문에 의한 평가기준별 가중치의 영향으로, 수자원사업은 단순히 경제성 분석만으로 평가를 해서는 안 됨을 의미한다. 본 연구는 대규모의 예산이 투입되는 수자원사업에 대한 효율성과 취약지역에 대한 형평성을 제고하는데 기여할 수 있을 것으로 판단된다.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 1997년도 춘계 학술대회 발표집
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• pp.3-7
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• 1997

Simulation is commonly used to find the best values of decision variables for problems which defy analytical solutions. "Simulation Optimization" technique is used to optimize the expressed in analytical of mathematical models. In this research, we will study Reverse-Simulation optimization method which is quite different from current simulation optimization methods in literature. We will focus on the on-line determination of steady-state method which is very important issue in Reverse-Simulation optimization, and the construction of Reverse-Simulation algorithm with expert systems. Especially, in the case of multiple objectives because of the dependency of simulation model, all objectives do not satisfied simulataneously. In this paper, therefore, we process simulation optimization using objectives with priority to optimize multiple objectives under single run.ingle run.

• PNF and Movement
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• 제22권2호
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• pp.159-170
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• 2024

Purpose: This study suggests observational gait analysis (OGA) strategies for therapists with limited experience in clinics in evaluating patients with stroke during walking. Methods: The proposed model was the mnemonic STEP APP, whose initials refer to the process of OGA for clinical reasoning and decision-making by identifying problems during walking in patients with stroke. Results: STEP APP stands for step (S), tibia (T), events (E), phases (P), ankle (A), problems (P), and priority (P). It serves as a procedural guide for OGA in patients with stroke walking on the ground. Conclusion: This review suggests a simple evaluation of gait using OGA that can be used by therapists who have less experience and difficulty in evaluating patients with stroke during walking. However, it is important to consider the front and back views of motion as well as motion in the transverse plane in order to analyze problems accurately. Furthermore, small joint problems, such as those in the foot, should be considered when evaluating patients with stroke during walking.

• 대한교통학회지
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• 제26권3호
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• pp.7-16
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• 2008

공항의 출입국 절차 간소화는 안전하고 신속한 여객과 화물 처리 측면에서 매우 중요하다. 신속한 출입국 절차는 공항 서비스 수준 및 효율성을 판가름하는 중요한 요인으로 작용하고 있다. 이에 따라 선진국들은 출입국 절차를 간소화하는 새로운 출입국 제도를 도입해 이용자의 만족도 및 공항 효율성을 높이고 있다. 한국의 국제공항들은 선진 출입국 절차제도 및 시스템이 활발히 추진되지 않고 있다. 본 연구는 공항에서 항공기, 승무원, 여객, 화물 및 우편물의 이동시 불필요한 장애나 지연 없이 그 흐름을 용이하게 하기 위한 국내 공항의 출입국 절차 개선을 위한 방향 및 개선과제를 제시하고 자료포락분석기법(Data Envelopment Analysis, DEA)을 이용해 개선과제의 효율적인 추진을 위한 우선순위를 도출하였다. 이 연구에서는 출입국 절차 간소화를 위해 시설 및 시스템 구축에 대한 R&D의 필요성이 높은 것으로 나타났다. 또한 출입국 절차 관련 성과지표와 측정체계의 필요성을 제시하였다.

• 산학경영연구
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• 제15권
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• pp.99-114
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• 2002

최근에 e-Business에 관한 여러 가지 사업모델이 발표되고 있다. 그러나 각자의 사업환경이 상이하기 때문에 각각 주어진 여건에 적합한 사업모델이 요구된다. 즉, 자본의 규모, 기술력, 정보수집능력과 정보량, 이익이나 목표고객 등의 여건을 고려한 e-Business모델을 개발할 필요성이 있다. e-Business 기업의 가치를 창출하는 방법은 여러 가지가 있을 수 있다. 그 중에서도 기업의 핵심역량을 강화하여 일부분만 성장 발전시키는 방법이 있을 수 있다. 이는 기업의 제한된 제약조건하에 상대적 경쟁우위에 있는 핵심역량부분에 차별적으로 집중하기 위한 적정 생산 투자수준을 찾아내는 문제로 전환하여 투자의 우선 순위를 모색할 수도 있을 것이다. 본 연구는 불명확한 정보를 이용하여 의사결정을 할 때 효과적으로 투자 우선 순위를 결정하기 위한 방법을 제안하고 있다. 그 방법으로써 FGP(fuzzy goal programming)문제에 대한 허용공차를 최소화하는 모형을 제시한다.

• 한국안전학회지
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• 제31권3호
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• pp.143-155
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• 2016

Recently, a massive loss of life and property is occurring in Korea due to traffic accidents, with the rapid increase in cars. For improvement of traffic safety, the Korea Transportation Safety Authority intensively analyzes accident data in local governments with low traffic safety index, performs a field investigation to extract problems and offers local governments improvements for problems, by conducting the 'Special Survey of Actual Conditions of Traffic Safety' each year, starting 2008. But local governments cannot strongly push forward the improvement projects due to the limited budget and the uncertainty of the improvement plan effects. Therefore, this study suggested a model which applied the Utility concept to the AHP theory, in order to efficiently decide a priority of the improvement plans in accident black spots in consideration of the limited budget of local governments. The number of accidents in each spot for improvement and accident severity, traffic volume, pedestrian volume, the improvement project cost and the accident reduction effect were chosen as evaluation factors for deciding a priority, and data about the improvement plan costs and the accident reduction effects, traffic accidents and traffic volume in the spots to undergo the special research on the real condition of traffic accident in the past were collected from the existing studies. Then, regression analysis was carried out and the Utility Curve of each evaluation factor was computed. Based on the AHP analysis findings, this study devised a priority decision method which calculated the weight and the utility function of each evaluation factor and compared the total utility values. The AHP analysis findings showed that among the evaluation factors, accident severity had the biggest importance and it was followed by the improvement plan cost, the number of accidents, the improvement effect, traffic volume and pedestrian volume. The calculated utility function shows a rise in utility, as the variables of the 5 evaluation factors; the number of accidents, accident severity, the improvement plan effect, traffic volume and pedestrian volume increase and a fall in utility, as the variables of the improvement plan cost increase, since the improvement plan cost is included in the budget spent by a local government.

• 한국농공학회논문집
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• 제51권5호
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• pp.69-78
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• 2009

In order to improve water quality of upper watershed of Paldang reservoir, it is necessary to evaluate non-point source pollution loads and identify critical watershed pollution sources. A GIS based Soil and Water Assessment Tool was applied to evaluate model application and reliability, estimate NPS pollution load, identify critical watershed by NPS pollution sources, and suggest various best management practices for Kyongan Stream watershed. Yearly NPS pollution loads were estimated 30.0% SS, 60.1% TN and 35.4% TP, respectably. The watershed pollution load is mainly decided by precipitation condition and SS and nutrients load have a significant regression relationship. Based on 10-year average yearly NPS pollution load, critical sub-watersheds were identified. The No. 5 and 17 which have lots of relatively intensive agricultural fields and scattered industrial area were vary critical sub-watersheds and under more intensive pollution load. In order to control critical watershed, watershed best management practices such as scientific fertilizer, contour farming and parallel terrace, transferring the sloppy farmland to grass or forest and constructing a buffer zone, and constructing wetlands and retention ponds will be applied. Overall the SWAT model can be efficiently used for identification of critical sub-watersheds in order to develop a priority watershed management plan to reduce water pollutions.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5442-5447
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• 2013

본 연구는 해상에서 선박간의 충돌상황을 회피하기 위한 선박 충돌 회피 우선순위지정 및 회피모델의 개발에 중점을 두었다. 이 논문에서는 DCPA, TCPA, VCD 등의 개념을 새롭게 접근하였고, 타 함정의 AIS, GPS 등에서 수집 가능한 정보, 즉 침로, 속도, 목적지, 길이 등을 바탕으로 선박의 조함자가 사전에 설정한 DCPA를 적용하는 SCAAM 개념을 제안하였다. 만약 선박이 충돌 위험이 존재한다면 조함자는 SCAAM을 이용하여 회피항해 또는 현재 침로-속도를 유지할 것인지를 결정하게 된다. 그리고 조함자가 회피를 결심하게 되면 선박은 국제해상 충돌예방규칙에 의거 회피를 결정하게 될 것이다. 따라서 이 연구는 사람의 실수로 인한 선박 충돌사고를 감소함으로써 선박의 안전항해에 기여할 수 있다.