• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2022년도 봄 학술논문 발표대회
• /
• pp.206-207
• /
• 2022

Currently, safety accidents in construction area are managed regardless of the size. Therefore, the objective of this study is to conduct for developing the quantitative risk assessment according to large and small and medium-sized construction sites. The scope of this study is limited to the fall accidents which is the biggest accidents in the construction sites. the regression analysis was conducted based on the collected data. As a result, it was confirmed that there was a statistically significant difference between larce and small and medium-sized construction sites. This study is expected to be used as basic data for research on the development of a risk quantitative model for small and medium-sized construction sites in the future.

• Korean Journal of Radiology
• /
• 제25권6호
• /
• pp.518-539
• /
• 2024

Coronary computed tomography angiography (CCTA) has emerged as a pivotal tool for diagnosing and risk-stratifying patients with suspected coronary artery disease (CAD). Recent advancements in image analysis and artificial intelligence (AI) techniques have enabled the comprehensive quantitative analysis of coronary atherosclerosis. Fully quantitative assessments of coronary stenosis and lumen attenuation have improved the accuracy of assessing stenosis severity and predicting hemodynamically significant lesions. In addition to stenosis evaluation, quantitative plaque analysis plays a crucial role in predicting and monitoring CAD progression. Studies have demonstrated that the quantitative assessment of plaque subtypes based on CT attenuation provides a nuanced understanding of plaque characteristics and their association with cardiovascular events. Quantitative analysis of serial CCTA scans offers a unique perspective on the impact of medical therapies on plaque modification. However, challenges such as time-intensive analyses and variability in software platforms still need to be addressed for broader clinical implementation. The paradigm of CCTA has shifted towards comprehensive quantitative plaque analysis facilitated by technological advancements. As these methods continue to evolve, their integration into routine clinical practice has the potential to enhance risk assessment and guide individualized patient management. This article reviews the evolving landscape of quantitative plaque analysis in CCTA and explores its applications and limitations.

• Fisheries and Aquatic Sciences
• /
• 제24권2호
• /
• pp.78-88
• /
• 2021

The annual consumption of fishery products, particularly sea squirt (Halocynthia roretzi), per person has steadily increased in South Korea. However, the quantitative risk of Vibrio parahaemolyticus following intake of sea squirt has not been analyzed. This study focuses on quantitative predictions of the probability of consuming sea squirt and getting of V. parahaemolyticus foodborne illness. The prevalence of V. parahaemolyticus in sea squirt was evaluated, and the time spent by sea squirt in transportation vehicles, market displays, and home refrigerators, in addition to the temperature of each of these, were recorded. The data were fitted to the @RISK program to obtain a probability distribution. Predictive models were developed to determine the fate of V. parahaemolyticus under distribution conditions. A simulation model was prepared based on experimental data, and a dose-response model for V. parahaemolyticus was prepared using data from literature to estimate infection risk. V. parahaemolyticus contamination was detected in 6 of 35 (17.1%) sea squirt samples. The daily consumption quantity of sea squirt was 62.14 g per person, and the consumption frequency was 0.28%. The average probability of V. parahaemolyticus foodborne illness following sea squirt consumption per person per day was 4.03 × 10^-9. The objective of this study was to evaluate the risk of foodborne illness caused by Vibrio parahaemolyticus following sea squirt consumption in South Korea.

• 한국가스학회지
• /
• 제17권1호
• /
• pp.56-66
• /
• 2013

가스제조 시설들은 불활성 가스공급을 통하여 제조업 시설의 안전한 운영 및 유지하는 역할을 하며, 폭발성, 가연성 및 독성가스를 공급하여 화학제품 제조에 필요한 기초 원료의 공급을 담당하는 역할을 한다. 또한 가스의 제조과정에서 고온, 고압, 초저온 및 촉매반응 등의 운전조건 하에서 시설이 운전되기 때문에 안전하고 신뢰성 있는 운영이 반드시 필요하다. 이러한 공장들은 공정관리가 복잡하며 제조물질의 누출로 인한 화재, 폭발 및 독성가스 누출로 인한 중대산업사고의 위험성이 있고, 불활성가스로 인한 질식재해, 고온 및 초저온으로 인한 화상 등 잠재적인 위험요소를 많이 가지고 있다. 본 연구는 신뢰성 있는 준 정량적 위험성평가 기법인 GRA(Generic Risk Analysis) 모델을 공기분리시설(ASU)에 적용하여 초기위험도(Initial Risk) 산정, 안전방벽(Safety Barriers) 적용, 잔여위험도(Residual Risk) 산정 및 중요안전요소(EIS, Elements Important for Safety)를 도출 하였으며, 위험성 평가 결과로 도출된 중요안전요소에 대한 효과적인 안전관리 및 시행절차의 구축을 제안하였다.

• 한국가스학회지
• /
• 제21권1호
• /
• pp.43-51
• /
• 2017

국내 냉동제조시설에서 암모니아 누출사고가 여전히 발생하고 있음을 볼 수가 있다. 암모니아는 가연성가스 및 독성가스이므로 사고 발생할 때 인체와 생태계에 큰 피해를 일으킬 수 있다. 국내 냉동제조시설의 암모니아 사고유형을 파악한 후 사고시나리오를 선정하여 피해범위를 산정하고 사고 빈도와 위험도를 분석하여 사고 피해를 최소화하는 대책 수립이 필요하다. 본 연구에서는 정량적 위험성 평가(QRA: quantitative risk assessment)의 분석 방법에 따라 암모니아 냉동시스템의 리시버 탱크에 대한 위험도를 분석하였다. 시나리오 분석 조건은 화학물질관리법에서 정하는 '사고시나리오 선정에 관한 기술지침' 및 미국 화학공정안전센터(CCPS: center for chemical process safety)의 가이드라인에 따라 정하였다. DVN사의 SAFETI 프로그램을 활용하여 시나리오에서 선정된 모든 사고 영향범위를 산정하고 빈도 분석을 통하여 리시버 탱크에 대한 위험도를 도출하였다. 빈도 값은 사건수 분석(ETA: event tree analysis)기법과 Part count 기법을 활용하였다. 연구 결과 암모니아 냉동시스템의 개인적 위험도는 7.71E-04/yr으로 도출되었으며, 사회적 위험도 1.17E-03/yr으로 도출되었다. 도출된 위험도는 국제 화재방지협회 (NFPA: national fire protection association)의 ALARP (as low as reasonably practicable) 범위를 적용하여 위험도의 적합성을 확인하였으며, 본 연구에서 제안한 위험도 산정 방법이 사고 피해 최소화 방안을 모색하는데 활용된다면 보다 좋은 결과가 도출될 것으로 판단된다.

• 대한안전경영과학회지
• /
• 제5권2호
• /
• pp.11-26
• /
• 2003

While a number of Korean companies have undergone ceaseless restructuring to survive today's rapidly changing global economy, the brick and mortar industry has been exerting their efforts to enhance the productivity through the development of new products, quality improvement, cost reduction measures. At present, various risk-evaluation measures have been taken in the fields at the discretion of an enterpriser, though, the effective methods enabling quantitative analysis are insufficient. Accordingly, this study is intended to contribute to the synthetic safety manage -ment in the factory fields and to suggest the quantitative -risk-analysis system by introducing such safety-estimation steps as assortment of processes, pre-assessment of risk factors, decision of risks, counter measures against studied risks, establishment of remedies.

• 한국가스학회지
• /
• 제14권5호
• /
• pp.38-44
• /
• 2010

본 논문은 철도를 통해 운송되는 프로필렌의 사고위험을 정량적으로 분석하였다. 프로필렌의 수송 경로에 따라 사고 시 피해 위험이 높을 것으로 예상되는 지역인 익산역, 순천역, 전주역으로 대상지역을 선정하였다. 프로필렌의 운송 중 일어날 수 있는 사고유형을 고려한 후 ETA(Event Tree Analysis)를 이용하여 사고시나리오 및 발생빈도를 도출하였고, PHAST 6.53(Process Hazard Analysis Software Tool)을 이용하여 사고피해예측 평가 실시하여 주변에 미치는 피해정도를 산정함으로써 개인적.사회적 위험성정도를 제시하였다.

• 정보보호학회논문지
• /
• 제14권2호
• /
• pp.101-111
• /
• 2004

ISP 네트워크의 보안수준 진단과 대응방안을 수립하기 위해서는 네트워크상의 정보자산에 대한 취약점과 위협 요인을 식별하고, 피해 발생시 예상되는 손실의 정도를 산정하는 위험분석 절차가 필수적이다. 하지만, 기존의 위험분석 방법론 및 도구들은 대부분 방법론적 분석절차와 수단만을 제공하며, 개별 시스템의 취약점 및 위협요인의 변동정보를 실시간으로 반영할 수가 없다. 따라서. 본 논문에서는 네트워크 침입탐지 시스템과 취약점 분석 시스템의 탐지 정보들을 실시간으로 수집, 분석하여 네트워크 자산에 발생할 수 있는 위험의 가능성을 찾아내고, 정량적인 위험수준을 평가하는 시스템을 제안한다. 또한, 실험을 통해 시스템의 성능수준을 제시하였다.

• 대한조선학회논문집
• /
• 제54권1호
• /
• pp.1-9
• /
• 2017

LNG has significant advantages in regard to environmental aspects comparing with conventional fuel oil. In fact, it is estimated that NOx and SOx emission can be reduced by about 90% and 100%, respectively in case of using LNG as a fuel. LNG-fuelled ship has been considered to be the best option both from an environmental and an economic point of view. Along with these trends, some major shipyards and Classification Societies have started to carry out the risk-based system design for LNG-fuelled ship such as passenger ship, platform supply vessel and large container vessel etc. However, new conceptual gas fuelled ship has high risk level compared with vessel using traditional crude oil especially in view of gas explosion accident. Therefore safety area where installed fuel gas supply system is required risk based system design with special considerations. On this paper, the entire process necessary for the quantitative risk analysis was explained to meet the satisfactory safety level of gas fuelled ship.

• 대한인간공학회지
• /
• 제32권1호
• /
• pp.153-158
• /
• 2013

Objective: This study aims to suggest different approaches in analyzing risks associated with musculoskeletal disorders (MSDS) for risk assessment. Background: Upon concluding that the changes in the industrial environments have made it hard to regulate diverse risk factors, the government has implemented a policy for risk assessment. Method: This study has proposed a method, creating programs using Excel that perform qualitative or quantitative analysis, for evaluating risk factors in risk assessments and has applied this in manufacture and service industries. Results: To verify the validity of the developed program, risk assessment has been performed on restaurant chefs as an example. For quantitative evaluation, the study has suggested approaches using the results for REBA evaluation and the analysis report on the work scenes of a fitting-shop in a shipbuilding industry. Application: Constructing and adapting a system using Excel in evaluating risk factors for risk assessments as this study suggests, is expected to contribute to revitalizing risk assessments.