• 대한토목학회논문집
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• 제26권3D호
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• pp.469-480
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• 2006

본 연구에서는 건설공사 리스크관리 현황을 파악하여 현재의 리스크관리 및 분석상의 문제점 및 기초적 개선방안을 파악하였다. 이러한 기초조사에 근거하여 연구에서는 리스크관리 시스템의 총괄적 구성을 리스크관리준비, 리스크확인, 리스크분석, 리스크대응의 4단계로 구분한 바 있으며, 이러한 각 프로세스별 리스크관리를 통합하여 구현할 수 있는 실무적 분석절차를 모형화 및 전산화하였다. 전산화를 위한 리스크관리의 단계별모듈은 기획, 시공, WBS 및 RBS의 연계활용, 리스크분석모듈로 구분 구성하며, 리스크분석기법으로 기존의 Fuzzy 기법을 단순화 한 분석방법론을 구성하였다. 모든 시스템구성은 시공자 위주로 구성하며 전산화 작업은 인터넷 기반으로 구성하여 본사 현장 및 계약자간 실시간 리스크관리 및 분석체계의 구축이 가능하도록 웹기반 메뉴방식으로 구성하여 실무사용시의 편리성을 극대화 하였다.

• Earthquakes and Structures
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• 제13권4호
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• pp.421-427
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• 2017

Seismic safety evaluation of weir structure is significant considering the catastrophic economical consequence of operational disruption. In recent years, the seismic probabilistic risk assessment (SPRA) has been issued as a key area of research for the hydraulic system to mitigate and manage the risk. The aim of this paper is to assess the seismic probabilistic risk of weir structures employing the seismic hazard and the structural fragility in Korea. At the first stage, probabilistic seismic hazard analysis (PSHA) approach is performed to extract the hazard curve at the weir site using the seismic and geological data. Thereafter, the seismic fragility that defines the probability of structural collapse is evaluated by using the incremental dynamic analysis (IDA) method in accordance with the four different design limit states as failure identification criteria. Consequently, by combining the seismic hazard and fragility results, the seismic risk curves are developed that contain helpful information for risk management of hydraulic structures. The tensile stress of the mass concrete is found to be more vulnerable than other design criteria. The hazard deaggregation illustrates that moderate size and far source earthquakes are the most likely scenario for the site. In addition, the annual loss curves for two different hazard source models corresponding to design limit states are extracted.

• The Journal of Asian Finance, Economics and Business
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• 제6권3호
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• pp.27-40
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• 2019

The study examines the effects of growth opportunities, debt maturity and liquidity risk on leverage, making use of a large panel of Chinese listed firms. Research on capital structure has broadened its scope from a single capital structure decision (the debt/equity choice) to various attributes of the debt in firms' capital structure. We use the system Generalized Method of Moments estimator to control for unobserved heterogeneity and the potential endogeneity of regressors. We find a negative relationship between growth opportunities and leverage. Further, we find that while the proportion of short-term debt attenuates the negative effect of growth opportunities on leverage, it negatively affects leverage as predicted by the liquidity risk hypothesis. When we distinguish between state owned firms and private controlled firms, we find evidence that these effects are only relevant to private controlled firms. However, our analysis indicates that the economic implication of liquidity risk effect is much lower for Chinese firms than that observed in the literature for US firms. Our study suggests that these differences can be explained by differences in the institutional environment in which firms operate. This finding related to Diamond's (1991) liquidity risk hypothesis extends our understanding of the relationship between liquidity risk and the debt maturity choice.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.145-150
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• 2004

In this paper, the hazardous rail-crossings of 100 sites were selected by preliminary hazard analysis on the 1774 sites in Sep. 2002. The risk factors of rail-crossing were reviewed on the accidents happened in '94$\～$'02 years, and the accident progress mechanism due to 5 types of rail-crossing structure was developed by the cause-result relationship analysis. Method coping with the risk factors was proposed for improving safety of rail-crossing.

• 한국의류학회지
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• 제37권6호
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• pp.772-785
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• 2013

This study investigated the effects of fashion consumer's browsing motives and risk perception on impulse buying and purchase intention in social commerce. The online survey results of 317 customers who experienced using fashion products via social commerce were used for the final analysis. Exploratory factor analysis, reliability analysis, and frequency analysis were conducted using SPSS 18.0, and confirmatory factor analysis and path analysis were performed with AMOS 18.0. Three browsing motives (hedonic motive, rational motive, and informational motive) and three risk perceptions (products-related risk, customer service risk, and opportunity loss risk) were identified. The results from the structure equation model were as follows. 1) It was deducted that the browsing motive did not have a significant effect on risk perception due to the rejection of most of the hypotheses in regards to the browsing motive influence on risk perception. 2) Product-related risk and customer service risk had a significantly negative effect on purchase intention. Opportunity loss risk had significantly positive effect on impulse buying and purchase intention. 3) Hedonic browsing motive had a significant effect on impulse buying, and rational motive had a significant effect on impulse buying and purchase intention. The informational browsing motive had a significant effect only on purchase intention.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.647-656
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• 2020

This study empirically examines the effect of ownership structure on bank diversification and risk-taking behavior. The population of this study is based on all commercial banks listed in Bangladesh. Thirty-two conventional commercial banks were randomly selected from thirty-three conventional banks for this study. Data was collected from the annual reports of the concerned banks from 2000 to 2017. To analyze the data, we had applied the two-stage least squares (2SLS) estimator. The results of the analysis show that ownership structure i.e. managerial ownership, institutional ownership, general public ownership, and ownership concentration have a significant negative impact on bank diversification. On the other hand, institutional ownership, managerial ownership, and general public ownership have a significant positive impact on Z-score, and ownership concentration has an insignificant but positive impact on the Z-score of banks in Bangladesh. Therefore, the study opposes the benefits of diversification and promotes ownership structure which is capable of ensuring better financial stability by reducing the probability of risk. The policy-makers especially, Bangladesh banks should evaluate the fact of this study to issue guidelines on corporate governance, bank diversification, and risk-taking behavior of commercial banks.

• 한국공간구조학회논문집
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• 제20권4호
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• pp.101-110
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• 2020

In case of stone pagoda structures, the various construction types appear, and various damages occur due to exposure to the outdoors for a long time. Such damages can be classified into non-structural damages and structural damages. However, studies for the effects of structural damages on stone pagoda structures are insufficient. Accordingly, this study intends to perform structural modeling and structural analysis according to structural damages of stone pagoda structure, and to perform risk analysis through the fragility curve. So, we expects that this study gives a great contribution to the preservation and maintenance of stone pagoda structures under the various structural damages.

• 한국건설관리학회논문집
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• 제5권2호
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• pp.136-143
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• 2004

본 논문은 초기 건설공사의 리스크 관리방법론을 제시한 것으로서, 리스크식별 및 분석을 중심으로 연구를 진행하였다. 리스크식별은 초기 건설공사를 $공통공사\cdot토공사\cdot지정$ 및 기초공사로 구분하여 리스크를 규명하고 작업분류체계에 기반하여 리스크분류체계를 제안하였다. 리스크분석은 리스크분류체계를 바탕으로 퍼지추론을 이용하여 리스크인자의 위험도를 정량화하고 퍼지척도를 이용하여 리스크인자의 중요도를 산정하였으며, 이를 통합하여 상위 리스크인자의 종합위험도를 구하기 위해 퍼지적분을 이용하였다. 리스크인자의 관리 우선순위는 종합위험도로부터 결정할 수 있다. 본 연구에서 제시한 리스크 관리 방법론의 타당성을 확인하기 위하여 사례적용을 실시하였으며, 그 결과 제시한 방법론이 현장 및 공사의 특성을 반영하여 리스크인자의 관리 우선순위를 결정하는데 충분히 활용할 수 있음을 확인할 수 있었다.

• 산업경영시스템학회지
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• 제32권2호
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• pp.158-170
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• 2009

This paper considers how the optimal export level is influenced by export risk, the degree of risk-averseness for exporting firms, and those firms' cost structure. In addition, export insurance is incorporated into some simple theoretical model to analyze the optimal export level. This paper applies genetic algorithm simulation to show that the exporting firms'risk-averseness do not affect the optimal export decision while export risk and cost function characteristic have relatively more significant effects on the optimal export level. Finally, our findings suggest that the most influential factor for the optimal export levels seems to be the monopoly power of exporting firms.

• Earthquakes and Structures
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• 제18권3호
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• pp.367-377
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• 2020

Incremental dynamic analysis (IDA) widely uses for the collapse risk assessment procedures of buildings. In this study, an IDA-based collapse risk assessment methodology is proposed, which employs a novel approach for detecting the near-collapse (NC) limit state. The proposed approach uses the modal pushover analysis results to calculate the maximum inter-story drift ratio of the structure. This value, which is used as the upper-bound limit in the IDA process, depends on the structural characteristics and global seismic responses of the structure. In this paper, steel midrise intermediate moment resisting frames (IMRFs) have selected as case studies, and their collapse risk parameters are evaluated by the suggested methodology. The composite action of a concrete floor slab and steel beams, and the interaction between the infill walls and the frames could change the collapse mechanism of the structure. In this study, the influences of the metal deck floor and autoclaved aerated concrete (AAC) masonry infill walls with uniform distribution are investigated on the seismic collapse risk of the IMRFs using the proposed methodology. The results demonstrate that the suggested modified IDA method can accurately discover the near-collapse limit state. Also, this method leads to much fewer steps and lower calculation costs rather than the current IDA method. Moreover, the results show that the concrete slab and the AAC infill walls can change the collapse parameters of the structure and should be considered in the analytical modeling and the collapse assessment process of the steel mid-rise intermediate moment resisting frames.