• International Journal of Naval Architecture and Ocean Engineering
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• 제13권1호
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• pp.340-350
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• 2021

This paper proposes a decision support model for USVs to improve the accuracy of collision avoidance decision-making. It is formed by Navigation Safety Domain (NSD) and domain-based Collision Risk Index (CRI), capable of determining the collision stage and risk between multiple ships. The NSD is composed of a warning domain and a forbidden domain, which is constructed under the constraints of COLREGs (International Regulations for Preventing Collisions at Sea). The proposed domain based CRI takes the radius of NSD in various encounter situations as threshold parameters. It is found that the value of collision risk in any directions can be calculated, including actual value and risk threshold. A catamaran USV and 6 given vessels are taken as study objects to validate the proposed model. It is found that the judgment of collision stage is accurate and the azimuth range of risk exists can be detected, hence the ships can take direct and effective collision avoidance measures. According to the relation between the actual value of CRI and risk threshold, the decision support rules are summarized, and the specific terms of COLREGs to be followed in each encounter situation are given.

• Preventive Nutrition and Food Science
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• 제7권1호
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• pp.95-104
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• 2002

A survey on Korean families′purchase of fresh fruits and vegetables was conducted to increase understanding of families′food decision making. Two hundred ninety seven families with at least one elementary-school age child were selected from four elementary schools to complete a questionnaire during April, 2001 in Gyeongju, Korea. Descriptive statistics, Chi-square test, T-test, and ANOVA statistics were used to analyze the data. The major findings are as follows: Families bought fresh fruits and vegetables at the public markets or the farmer′s markets and a large supermarket most frequently in both summer and winter. Families grew produce by themselves and bought them from farmers directly least frequently in both summer and winter. Families whose housewives had less than middle school education brought fruits and vegetables from Agricultural Co-ops and grew thens by themselves more frequently compared to those who had higher education. On the other hand, families whose housewives had graduated from 4 year college bought fruits and vegetables from large supermarkets more frequently compared to those who had lesser education. "Quality"and "safety production"of fruits and vegetables and "clean environment of store"were the three most important factors when they decided the place to buy fruits and vegetables. "Being treated as a valuable customer" and "ease of finding things"were the two least important factors. Families whose housewives were in their thirties valued "cleanness of the store"and "being treated as a valuable customer"important factors when they decided the place. Families whose housewives had less than middle school education thought that price, availability of public transportation, and availability of locally grown food were the important factors for deciding the place compared to those who had higher education. The price was the factor which low-income families thought important for decision making on the place to buy fruits and vegetables.

• Korean Journal of Hydrosciences
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• 제8권
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• pp.31-40
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• 1997

Flow carrying capacity of water distribution systems is getting reduced by deterioration of pipes in the systems. The objective of this paper is to present a managerial decision-making model for the rehabilitation of water distribution systems with a mininum cost. The decisions made by the model also satisfy the requirements for discharge and pressure at demanding nodes in the systems. Replacement cost, pipe break repair cost, and pumping cost are considered in the economic evaluation of the decision along with the break rate and the interest rate to determine the optimal replacement time for each pipe. Then, the hydraulic integrity of the water distribution system is checked for the decision by a pipe network simulator, KYPIPE, if discharge and pressure requirements are satisfied. In case the system does not satisfy the hydraulic requirements, the decision made for the optimal replacement time is revised until the requirments are satisfied. The model is well applied to an existing water distribution system, the Seoul Metropolitan Water Supply System (1st Phase). The results show that the decisions for the replacement time determined by the economic analysis are accepted as optimal and hydraulic integrity of the system is in good condition.

• 한국산림과학회지
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• 제106권4호
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• pp.441-449
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• 2017

사유림 경영 활성화를 위해서는 산주들의 참여가 매우 중요하다. 본 연구에서는 선도산림경영단지 내 산주들의 참여를 확대할 수 있는 방안을 찾고자 하였다. 이를 위해 선도산림경영단지 내 산주들을 대상으로 심층 인터뷰를 실시하여 참여수준을 파악하고 Arnstein의 주민참여 8단계 이론을 적용하여 산주들의 참여수준을 분석하였다. 연구결과 선도산림경영단지 산주들의 참여수준은 형식적인 단계에 머물러 있으며 의사결정 과정에 미치는 영향력이 매우 제한적인 것으로 나타났다. 따라서 본 연구에서는 제도적으로 산주들이 단지 운영을 위한 의사결정과정에 참여할 수 있도록 산주협의체를 제도화하고 선도산림경영단지 산림경영 담당자와의 파트너십 체결을 제안하였다. 다만 본 연구에서는 단지 운영에 적극적인 일부 소재 산주를 대상으로 심층인터뷰를 실시함으로써 전체 선도산림경영단지 참여 산주들의 의견을 대표하는 데에는 다소 한계가 있다.

• 지능정보연구
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• 제11권1호
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• pp.35-51
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• 2005

인터넷의 보급과 전자상거래 관련기술의 발달은 기존의 상거래 방식에 많은 변화를 가져왔으며, 전자상거래 환경에서도 실세계의 거래방식을 구현하기 위한 시도가 잇따르고 있다. 협상은 기존 상거래에서 정찰제 거래를 제외한 대부분의 거래 시 수행되고 있는 거래방식으로써, 협상의 기능을 전자상거래 환경에서도 구현하고자 하는 연구가 시도되고 있다. 본 연구는 전자상거래 환경에서 자동협상시스템 구현을 위한 다속성 협상안을 생성하고 평가하는 방법론에 대한 내용을 설명하고 있다. 본 연구에서는 주문제조 생산 환경에서 일어나는 협상을 대상으로 협상의 항목이 둘 이상인 다속성 협상문제을 정의하고 이의 해결 방법론을 연구하고자 한다. 이를 위해 판매자는 자신의 협상안 생성을 위해 제품생산 일정계획과 가격을 고려한 협상안을 생성하고 구매자가 제시한 협상안은 다속성 의사결정(Multi Attribute Decision Making MADM) 기법 중 단순 가중합법(Simple Additive Weighting Method : SAW)을 이용하여 평가하게 된다.

• Journal of Preventive Medicine and Public Health
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• 제55권5호
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• pp.415-423
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• 2022

Economic evaluations in the healthcare are used to assess economic efficiency of pharmaceuticals and medical interventions such as diagnoses and medical procedures. This study introduces the main concepts of economic evaluation across its key steps: planning, outcome and cost calculation, modeling, cost-effectiveness results, uncertainty analysis, and decision-making. When planning an economic evaluation, we determine the study population, intervention, comparators, perspectives, time horizon, discount rates, and type of economic evaluation. In healthcare economic evaluations, outcomes include changes in mortality, the survival rate, life years, and quality-adjusted life years, while costs include medical, non-medical, and productivity costs. Model-based economic evaluations, including decision tree and Markov models, are mainly used to calculate the total costs and total effects. In cost-effectiveness or costutility analyses, cost-effectiveness is evaluated using the incremental cost-effectiveness ratio, which is the additional cost per one additional unit of effectiveness gained by an intervention compared with a comparator. All outcomes have uncertainties owing to limited evidence, diverse methodologies, and unexplained variation. Thus, researchers should review these uncertainties and confirm their robustness. We hope to contribute to the establishment and dissemination of economic evaluation methodologies that reflect Korean clinical and research environment and ultimately improve the rationality of healthcare policies.

• 보건행정학회지
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• 제10권3호
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• pp.19-49
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• 2000

보건소 조직구조에 대한 인식도 점수는 5 점척도 기준으로 재량권 필요성에 대한 인식도가 3.55 점으로 가장 높았고 보건소 조직구조에 대한 일반적 인식이 3.06점, 업무분장의 적합성 3.05점, 인력ㆍ예산의 적정성이 2.93 점, 의사결정권 소재에 대한 인식이 2.77 점 순이었다. 보건소 조직구조에 대한 직원들의 일반적 인식도 점수는 중소도시에서, 50 대 이상에서, 고졸 이하에서, 6급이상에서, 공무원 근무경력이 20년이상에서, 현부서 근무기간이 2년이하에서, 월평균 보수가 181만원이상에서 각각 타 군보다 높았으며 이들 변수들은 유의한 관련성이 있었다 그리고 의사결정권 소재에 대한 인식도 점수는 대도시에서, 남자에서, 기혼자에서, 6급이상자에서, 보건ㆍ행정직에서, 월평균 보수가 131-180 만원에서 각각 타 군보다 높았으며 이들 변수들은 유의한 관련성이 있었다. 재량권 필요성에 대한 인식도 점수는 20 대에서, 미혼자에서, 대졸이상자에서, 간호직에서, 공무원 근무경력이 5년이하자에서, 현부서 근무기간이 2년 이하자에서, 월평균 보수가 80 만원 이하자에서 각각 타 군보다 높았다. 인력ㆍ예산 적정성에 대한 인식도 점수는 여자에서,30 대에서, 기혼자에서,8 급에서, 보건ㆍ행정직에서, 현부서 근무기간 2-4년인자에서 각각 타 군보다 높았다. 그리고 업무분장의 적합성에 대한 인식도 점수는 중소도시에서, 기혼자에서, 의료기술직에서, 공무원 근무경력이 20 년이상자에서, 현부서 근무기간이 4년이하자에서 각각 타 군보다 높았으며 이틀 변수들은 유의한 관련성이 있었다, 보건소 직원들의 보건소 조직관리에 대한 인식도 조사에서 의사결정시 의견반응에 관한 인식도가 2.92 점으로 가장 높았으며, 목표량 설정방법의 합리성에 관한 인식이 2.88점, 보건소 인사관리에 대한 인식이 2.63점이었다. 보건소 인사관리에 대한 인식도 점수는 중소도시에서, 40대에서, 6급 이상자에서, 의료기술직에서, 공무원 근무경력이 20년 이상자에서, 현부서 근무기간이 2년 이하자에서, 월평균 보수가 181만원 이상자에서 각각 타 군보다 높았으며 이들 변수들은 유의한 관련성이 있었다. 의사결정시 의견반응에 관한 인식도 점수는 중소도시에서, 여자에서, 8급에서, 보건ㆍ행정직에서, 현부서 근무기간 2 년 이하자에서 각각 타 군보다 높았으며, 목표량 설정방법의 합리성에 관한 인식도 점수는 50대 이상에서, 고졸 이하자에서,6 급 이상 자에서, 의무직에서, 공무원 근무경력 15-20 년인 자에서 각각 타 군보다 높았으며 이들 변수들은 유의한 관련성이 있었다. 직무만족도에 유의하게 영향을 미치는 요인은 성, 교육정도, 업무분장의 적합성, 목표량 설정방법의 합리성에 관한 인식, 동기요인, 위생요인 이었으며, 조직문화에 유의하게 영향을 미치는 요인은 연령, 공무원 근무경력, 현부서 근무기간, 보건소 인력ㆍ예산의 적정성에 대한 인식, 업무분장의 적합성, 의사결정시 의견반응에 관한 인식, 목표량 설정방법의 합리성에 관한 인식이었다.

• 유통과학연구
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• 제13권8호
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• pp.15-25
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• 2015

Purpose - There is a lack of research on how much corporate control is sufficient for effective subsidiary business-related decision making. To address this research gap, this study analyzes the impact of the level of control of a Korean corporation's headquarters on its overseas subsidiary performance. Research design, data, methodology - The study's sample comes from the Overseas Korean Business Directory of KOTRA. A multiple regression analysis empirically confirmed the relationship between the headquarters level of control over the subsidiaries and their performance. Results - The results show that the greater an organization's headquarters control over strategic issues, the greater the subsidiary's non-financial performance. However, quick decision-making through decentralization promotes the rapid selection of successful new products that can provide a competitive advantage. Conclusion - This study shows that the impact of control levels on subsidiary performance depends on the type of control involved. Specifically, while low levels of control over operational issues had a positive (+) influence on subsidiary non-financial performance, high control levels led to improved non-financial performance with regard to strategic issues among the subsidiaries.

• Journal of Information Technology Applications and Management
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• 제26권4호
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• pp.1-18
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• 2019

The virtual reality (VR) is an immerging technology used in the serious games industry to treat psychological disorders like dementia. We created a system named as Virtual Reality Home (VRH) for the elderly who lived with Alzheimer's disease (or other form of dementia) and cognitive impairment using virtual reality technology. The purpose of our study is to measure the long-time immersion and retention of VRH on the moods and apathy, enhancement in physical and brain stimulation as well as a decision making with peoples of dementia and explore the experience of aged care home staff's member. The VRH shows a positive impact on the elderly participants and staff members. During the VRH experience, excitement and a great level of alertness were observed among the participants but few of them were feeling anxiety. Furthermore, we observed the improvement in physical, memory and brain stimulation, but the participants have a low focus on decision making because they wanted to explore all interactable objects in the VRH. This study suggests that the VR may have the potential to improve the quality of life, and these results can assist to expand the future development in the enhancement of efficiency of people with dementia.

• 성인간호학회지
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• 제21권1호
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• pp.117-128
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• 2009

Purpose: The purposes of this study were as follows; 1) To review the definitions of critical thinking from various perspectives, 2) To examine the critical thinking measurements throughout nursing research, and 3) To review the nursing studies with regard to critical thinking. Methods: This study was a literature review with regard to the critical thinking in nursing in aspects of conceptual meaning, measurements, and research. Results: The definition of critical thinking in nursing included decision making in clinical setting, inference with logical construct to increase nursing quality, interpretation in the context, and evaluation. The critical thinking was a core concept, which meant not only simple nursing process, but included decision making ability. The critical thinking has been conceptualized by both critical thinking disposition and skill. However, there was no nursing specified critical thinking measurement. Critical thinking research has been conducted to describe critical thinking disposition and critical thinking, to determine relationships between critical thinking and clinical competency, and to evaluate the effectiveness of educational programs. Conclusion: The instruments for measuring critical thinking disposition and skill that contain cultural difference and clinical specificity need to be developed to measure critical thinking and increase it.