• 한국산학기술학회논문지
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• 제22권1호
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• pp.275-284
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• 2021

본 연구에서는 기업규모에 따라 레버리지가 기업실패에 미치는 영향에 차이가 있는가를 생존분석을 이용하여 분석하였다. 이를 위해 1999년부터 2019년까지 한국거래소 유가증권시장과 코스닥시장에 상장된 총 25,250개(연도-기업) 기업을 분석하였다. 레버리지의 대용변수로는 총부채지표인 레버리지비율과 단기부채지표인 매입채무와 유동부채비율, 장기부채지표인 비유동부채비율을 사용하였다. 실증분석결과 첫째, 대체로 레버리지의 증가는 기업실패 가능성을 높이는 요인으로 작용한다는 것을 확인하였다. 다만 매입채무비율의 증가는 기업의 실패 가능성을 낮춘다는 것을 확인하였다. 기업의 매입채무 증가가 기업리스크의 확대로 연결되기 보다는 활발한 영업활동의 전개나 무이자부채의 적극적인 활용으로 인식되어 기업실패 가능성을 감소시키는 요인으로 작용하는 것으로 이해되었다. 둘째, 대기업과 중소기업으로 나누어 분석한 결과, 대기업에서는 레버리지비율과 매입채무비율이 높아지면 기업실패 가능성이 낮아진다는 것을 확인하였다. 중소기업의 경우에는 모든 유형의 레버리지 증가는 기업실패 가능성을 높이는 요인이 된다는 것을 확인하였다. 중소기업에서 레버리지의 증가는 기업위험의 증가로 연결되어 기업실패 가능성을 높이는 것으로 이해할 수 있었다. 그러나 대기업의 경우는 레버리지의 증가가 기업위험으로 연결되기 보다는 레버리지효과나 활발한 사업 활동의 전개로 연결되어 기업실패 가능성을 낮추는 작용을 하는 것으로 이해할 수 있었다. 이러한 분석결과에서 레버리지가 기업실패에 미치는 영향은 기업규모에 따라 차이가 있다는 것을 확인할 수 있었다.

• 융합보안논문지
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• 제18권1호
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• pp.143-155
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• 2018

본 연구는 경호원의 실패요인을 규명하기 위하여 실패귀인을 추출하고, 사례통합분석을 통하여 위해패턴 요인을 도출하였다. 실패귀인은 완전 개방형 질문지(8명)를 시작으로 반구조화 질문지(17명), 폐쇄형 설문지(179명)를 제작하여 SPSS 21.0, AMOS 21.O 통계패키지를 통하여 자료를 처리하였다. 실패귀인과 실패사례 간의 인과관계(경호 실패패턴 요인)를 분석한 결과, 박정희 암살사건에서 불성실(2), 부정적 마인드(1), 업무능력부족(1), 경험부족(2), 조직의 비체계성(2), 사명의식결여(1), 개인주의(1), 업무공유실패(2), 사명의식결여(2) 등 14개의 실패 패턴이 발견되었고, 아웅산 묘소 폭발사건은 불성실(1), 부정적 마인드(1), 업무능력부족(2), 경험부족(2), 개인주의(1), 업무공유실패(1) 등 8개의 실패패턴이 있는 것으로 조사되었으며, 육영수여사 저격사건의 경우, 불성실(2), 부정적 마인드(1), 경험부족(2), 사명의식결여(2), 업무공유실패(1) 등 8개 실패패턴이 있는 것으로 조사 되었다. 3개 사례와 실패귀인 요인간의 관계에서 총 30건의 실패패턴이 발견되었다.

• Journal of Computing Science and Engineering
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• 제2권2호
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• pp.200-219
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• 2008

The effective management of uncertainty is one of the most fundamental problems in medical decision making. According to the literatures review, most medical decision models rely on point estimates for input parameters. However, it is natural that they should be interested in the relationship between changes in those values and subsequent changes in model output. Therefore, the purpose of this study is to identify the ranges of numerical values for which each option will be most efficient with respect to the input parameters. The Nonhomogeneous Poisson Process(NHPP) was used for describing the behavior of aging chronic diseases. Three kind of failure models (linear, exponential, and power law) were considered, and each of these failure models was studied under the assumptions of unknown scale factor and known aging rate, known scale factor and unknown aging rate, and unknown scale factor and unknown aging rate, respectively. In addition, this study illustrated developed method with an analysis of data from a trial of immunotherapy in the treatment of chronic Granulomatous disease. Finally, the proposed design of Bayesian value of information analysis facilitates the effective use of the computing capability of computers and provides a systematic way to integrate the expert's opinions and the sampling information which will furnish decision makers with valuable support for quality medical decision making.

• 중환자간호학회지
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• 제12권1호
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• pp.94-108
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• 2019

Purpose : Heart failure (HF) is considered an important medical burden with rehospitalization and mortality. Anemia is a major risk factor associated with the severity of HF. To improve the understanding of the impact of anemia in the population with HF, we explored the prevalence of anemia, its guidelines, relationship between anemia and mortality or rehospitalization, and limitation of reviewed papers of various populations with HF. Method: We used Whittemore and Knafl's integrative review methodology (2005), and thirty research papers were analyzed. PubMed, CINAHL, Cochrane, PsychInfo, Embase, Web of Science were searched for papers published between January 1960-June 2018. Results: Anemia in individuals with HF was primarily defined using the World Health Organization guideline. The prevalence of anemia in patients with HF varied from 9% to 56.7%. Moreover, such a condition significantly increases the prevalence of mortality or rehospitalization in patients with HF. The analyzed majority were non-prospective cohort study including secondary data analysis. Conclusion: Anemia in individuals with HF is a significant risk factor of mortality and rehospitalization. Prospective cohort studies should be designed to identify the optimal value for screening anemia and the impact of anemia on rehospitalization and mortality among HF patients.

• 한국항공운항학회지
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• 제24권4호
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• pp.26-34
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• 2016

In this study, reliability prediction of the ignition system of hybrid rocket is performed. The FMECA is preceded to the reliability prediction. To this end, the ignition system is divided into 5 components and 19 potential failure modes. The failure cause and effects are identified and criticality analysis is carried out for each failure mode, in which the criticality number is estimated using the failure rate databases. Among the numbers, the failure modes and components with higher criticality and severity are chosen and allocated with higher weighting factor. The reliability predictions are performed using the failure rate databases, from which the current ignition system is found to satisfy the target reliability.

• 산업경영시스템학회지
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• 제23권61호
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• pp.75-87
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• 2000

This paper proposes a procedure for designing an accelerated test using SMAT(Stress, (failure) Mechanism and Test) model describing the relation among stress, failure mode/mechanism and test method. In SMAT model the stresses to be applied are derived from the environmental factor analysis, the relative importance of those stresses can be estimated using AHP(Analytic Hierarchy Process) and failure mode/mechanism and test method are derived from the fields failure information and FMEA(Failure Mode and Effect Analysis). By applying the procedure we can make a selection of major factors to cause the failure of assembly and design the accelerated test using DOE(Design of Experiments) The procedure is illustrated with an qualification test case study of washing machine shaft assembly in "A" electric appliance company.

• 한국신뢰성학회지:신뢰성응용연구
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• 제13권1호
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• pp.65-76
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• 2013

In order to assess the reliability of engine mount for a vehicles, life test model and procedure are developed. By using this method, failure mechanism and life distribution are analyzed. The main results are as follows; i) the main failure mechanism is degradation failure of engine mount rubber by fatigue failure at dynamic load. ii) temperature is a second factor to affect a failure. iii) the life distribution of engine mount module is fitted well to Weibull life distribution and the shape parameter is 18.4 and the accelerated life model of that is fitted well to Arrhenius model.

• Asia pacific journal of information systems
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• 제8권1호
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• pp.103-124
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• 1998

The recent information society is affected by new technologies including EC(Electronic Commerce), CALS(Commerce At Light Speed), EDI(Electronic Data Interchange), telecommuting and teleconferencing. The research goal of this paper is to identify major failure factors to reduce the dysfunction of EC and to suggest possible strategies that overcome those obstacles. The research methodologies of major failure factors are very similar to those of critical success factors which were widely used in MIS research areas. Ideally EC provides the possibility of a win/win situation for vendors and consumers. A survey study was performed using questionnaires. The factor analysis was performed to identify failure factors. Several hypotheses were set up to identify the major failure factors to reduce the dysfunction of EC. The regession analysis was performed to test those hypotheses and to understand the relationships between the major failure factors identified and the performance variables such as satisfaction, usage, and usefulness. Finally, the paper suggests alternatives to activate EC in terms of regulations, social rules, a technological model, etc.

• 대한산업공학회지
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• 제39권2호
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• pp.143-148
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• 2013

In FMEA, occurrence and detectability are not related to only failure modes itself but also their causes. It is assumed that any failure occurs after at least one cause corresponding to failure occurs in advance. Occurrence of the failure mode is described by occurrence time of its cause and elapsed time to the actual failure. Under the periodic monitoring plan, the monitoring interval is another factor to determine the detectability and occurrence of each failure mode. When a failure cause occurs, the failure does not occur if the cause is identified and remedied before it actually occurs. Under this situation, we construct an economic model for prioritizing failure modes. The loss function is based on the unfulfilled mission period. We also provide an optimal monitoring plan with an illustrative example.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2005년도 춘계학술대회 논문집
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• pp.228-233
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• 2005

The damage of the pressure courage by degradation can become the reason of unexpected break down or failure accident and it is very important because safety accident, the production loss, environmental pollution, social problems are occur. Consequently The result to investigat of failure accident for domestic pressure vessel, the factor of degradation is SCC, Sorrosion, Cavity, Crack.