• 디자인학연구
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• 제14권1호
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• pp.103-110
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• 2001

본 연구는 제품지향성과 지각된 가격수준에 따라 심미적 반응에 대한 전형성효과가 어떻게 달라지는지를 검증하고자 하기 위한 것이다. 본 연구를 통하여 기존연구가 전형성과 선호도간의 관계에 대한 의견의 일치를 보이지 못하는 것과 관련하여 제품지향성과 지각된 가격수준으로 세분화하여 분석함으로써 그러한 한계점을 극복하고 결과적으로 심미적 반응에 대한 전형성의 효과를 검증하였다. 본 연구의 결과를 통하여 디자인지향적 제품의 경우에는 전형성과 선호도간의 역U자형 관계를 나타내고 있을 것으로 파악되었으나 상대적으로 기능지향적 제품의 경우에는 전형성과 선호도와의 관계는 나타나지 않았다.

• 생물정신의학
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• 제13권2호
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• pp.103-109
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• 2006

Objective : Associations of vascular risk/disease or apolipoprotein E ${\varepsilon}4$(APOE4) with geriatric depression has been unclear at a population level. This study aimed to evaluate whether there would be interactions of vascular risk/disease and APOE4 on depression in a Korean elderly population. Methods : 732 community residents aged 65 or over were assessed for depression(GMS), information on vascular risk/disease(reported stroke, transient ishemic attack, heart disease, hypertension, diabetes, smoking), examinations for vascular risk/disease(blood pressure, blood tests for glucose and lipid profiles, body size), APOE genotypes, demographic characteristics(age, gender, education), physical health, and cognitive function(MMSE). Results : Previous stroke and lower level of high density lipoprotein(HDL) cholesterol were significantly associated with geriatric depression independent of demographic characteristics, physical illnesses, and cognitive function. These associations were statistically significant only in those with APOE4, although the interaction terms didn't reach to statistical significance. Conclusion : Associations between vascular risk/disease and geriatric depression might be more prominent in those with APOE4. However further research would be needed to clarify this issue.

• 융합정보논문지
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• 제10권7호
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• pp.223-231
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• 2020

노인 운전자는 기능저하로 인해 사고 위험성이 증가하지만 스스로 변화를 점검하는 자가-조절 능력 또한 발달한다. 이에 실제 노인 운전자가 운전 능력과 위험성 변화에 대응하는 특성에 대한 정보는 노인의 운전 능력 평가 현장과 연구에 의미있는 근거를 제공할 수 있다. 따라서 본 연구의 목적은 한국 노인 운전자의 운전 위험성 자각 특성을 운전 중 행동과 운전관련 기능변화의 측면에서 분석하여 노인 운전자 평가를 위한 기초 자료를 제공하는 것이다. 지역사회에 거주하는 노인 운전자 500명을 대상으로 자가-보고식 평가를 실시하고 노인 운전자의 운전 위험성 자각 징후를 분석하였다. 그 결과 다수의 노인 운전자가 시각 및 청각이 저하되거나 운전 여건 변화에 적응하는데 어려움을 느낄 때 운전 위험성을 자각하는 특성이 있음을 확인하였다. 반면, 약물 복용이나 간질, 발작, 의식손실 등 의학적 건강 상태 변화에는 둔감하게 반응하는 특성이 확인되었다. 본 연구 결과가 고령화가 가속화되는 한국의 노인 운전자 안전 관리에 기여할 수 있기를 기대한다.

• 산업경영시스템학회지
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• 제40권3호
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• pp.27-37
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• 2017

As the global uncertainty of manufacturing has increased and the quality problem has become global, the recall has become a fatal risk that determines the durability of the company. In addition, as the convergence of PSS (product-service system) product becomes common due to the development of IT convergence technology, if the function of any part of hardware or software does not operate normally, there will be a problem in the entire function of PSS product. In order to manage the quality of such PSS products in a stable manner, a new approaches is needed to analyze and manage the hardware and software parts at the same time. However, the Fishbone diagram, FTA, and FMEA, which are widely used to interpret the current quality problem, are not suitable for analyzing the quality problem by considering the hardware and software at the same time. In this paper, a quality risk assessment model combining FTA and FMEA based on defect rate to be assessed daily on site to manage quality and fishbone diagram used in group activity to solve defective problem. The proposed FTA-FMEA based risk assessment model considers the system structure characteristics of the defect factors in terms of the relationship between hardware and software, and further recognizes and manages them as risk. In order to evaluate the proposed model, we applied the functions of ITS (intelligent transportation system). It is expected that the proposed model will be more effective in assessing quality risks of PSS products because it evaluates the structural characteristics of products and causes of defects considering hardware and software together.

• 한국인터넷방송통신학회논문지
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• 제9권6호
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• pp.135-139
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• 2009

어선의 안전을 실시간으로 모니터링하고 위험요소가 발생했을 경우에 사용자에게 이를 경보하고 통보해줄 수 있는 장치에 대한 필요성이 크게 대두되고 있다. 위험요소를 감지하는 다기능 센서를 사용하기 위해서 임베디드 모듈에서는 Device driver와 Application program을 구현해야 하는 문제가 있다. 본 논문에서는 Device driver와 Application program의 구현 없이 다기능 센서의 입출력 데이터를 관리 및 처리하기 위해서 PIC18F를 이용하여 센서부의 하드웨어 설계 및 제어프로그램 구현을 하였다. 센서의 동작에 따라 데이터를 출력하는 동작 확인을 통하여 성능검증을 하였다.

• Nuclear Engineering and Technology
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• 제41권6호
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• pp.849-858
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• 2009

Risk caused by safety-critical instrumentation and control (I&C) systems considerably affects overall plant risk. As digitalization of safety-critical systems in nuclear power plants progresses, a risk model of a digitalized safety system is required and must be included in a plant safety model in order to assess this risk effect on the plant. Unique features of a digital system cause some challenges in risk modeling. This article aims at providing an overview of the issues related to the development of a static fault-tree-based risk model. We categorize the complicated issues of digital system probabilistic risk assessment (PRA) into four groups based on their characteristics: hardware module issues, software issues, system issues, and safety function issues. Quantification of the effect of these issues dominates the quality of a developed risk model. Recent research activities for addressing various issues, such as the modeling framework of a software-based system, the software failure probability and the fault coverage of a self monitoring mechanism, are discussed. Although these issues are interrelated and affect each other, the categorized and systematic approach suggested here will provide a proper insight for analyzing risk from a digital system.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회 2001년도 추계학술대회 논문집
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• pp.157-160
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• 2001

Firms pursue new business opportunities for growth. Market development strategy is one of the growth strategies, which develops new market segments with current products. However, new market generally has high uncertainty, or high risk. Firms should consider the risk in making and implementing the market development strategy. In this paper, an optimal marketing resource allocation model is developed, taking into account the risk attitude of a firm in market development. Under the assumption of exponential utility function, the global optimal solution is derived, and the implications are provided.

• East Asian mathematical journal
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• 제37권1호
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• pp.79-85
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• 2021

In this paper, we investigate the valuation of vulnerable exchange option that has credit risk of option issuer. The reduced-form model is used to model credit risk. We assume that credit event is determined by the jump of the counting process with stochastic intensity, which follows the mean reverting process. We propose a simple approach to derive the closed-form pricing formula of vulnerable exchange option under the reduced-form model and provide the pricing formula as the standard normal cumulative function.

• 재무관리연구
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• 제2권1호
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• pp.21-34
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• 1986

The purpose of this study is to analyse the risk and uncertainty involved in the capital budgeting which is executed in long periods and requires massive capital expenditure. Under risk and uncertainty conditions, the estimates in the capital budgeting are random variables rather than known constants. Two approaches have emerged in performing economic analysis that explicitly incorporate risk and uncertainty conditions in the analysis. One approach is to develop a descriptive model which describes the economic performance of an individual investment alternative. But no recomendation would be forthcoming from the model. Rather, the decision-maker would be furnished descriptive information concerning each alternative; the final choice among the alternatives would required a separate action. The second approach is to develop a normative model which includes an objective function to be maximized or minimized. The output from the model prescribes the course of action to be taken. Owing to the fact that the normative approach considers the fitness of criteria for decision-making its reasonableness looks better. But it is almost imposible that we correctly and easily derive the individuals' utility function. So within we recognize the limits of the descriptive methods, it is more practicle to analyse the investment alternatives by sensitivity analysis.

• 산업경영시스템학회지
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• 제47권2호
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• pp.84-92
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• 2024

The purpose of this study is to analyze effect of Army Risk Assessment System(ARAS) which is used to prevent safety accident in ROK army. Based on prior research, we select 4 indicators which are related to accident prevention effect and analyze the differences before and after ARAS operation for each indicators by using Paired-Samples T-Test. Also, we analyze the correlation between degree of ARAS operation and status of safety accidents of 112 ROK Army units. We conduct an evaluation of each function within the system using IPA method. The results of this study are as follows; All 4 indicators are improved compared to before ARAS operation, and the differences are statistically significant. Also, there is negative correlation between the degree of ARAS operation and the occurrence of safety accidents. So, the operation of ARAS has a positive effect on preventing safety accidents. Finally among the 15 functions of ARAS, 4 functions require improvement. The findings of this study have implications for proposing necessity of computerized system in enforcing Risk Assessment. Also, whether or not operating ARAS is important, but it is also important to operate it well. Lastly, We propose improvement plans for each function to operate it well.