• Korean Journal of Construction Engineering and Management
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• v.18 no.2
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• pp.108-116
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• 2017

It is expected that the maintenance cost of domestic bridges will increase considerably due to the increase of bridge service time. In response to this situation, the government and relevant ministries are focusing on developing ways to efficiently allocate limited budgets and to rationally select maintenance bridge. In this study, to develop a risk - based bridge maintenance priority decision model, 14 common risk factors causing damage to bridges were extracted and AHP analysis was performed to select 5 important factors. Based on the existing literature review and expert consultation, we derive the evaluation criteria and the impact weights of the selected factors, and based on this, I presented risk based bridge maintenance priority model. Using this model in combination with existing maintenance priority methods will lead to more reasonable bridge maintenance priorities.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.374-374
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• 2022

상수도 시스템은 물을 수용가에 깨끗하고 충분하게 공급하는 사회기반시설 중 하나이다. 최근 상수도관로 노후화로 인하여 발생하는 누수, 적수, 단수 등의 피해를 방지하기 위하여 상수도관로 점검 및 진단을 수행하고 관 상태를 평가하여 해당 요소에 대한 보수 및 보강을 시행하고 있다. 하지만 기존의 정비사업은 관 노후도를 고려한 보강계획을 수립하여 효과적인 상수도 시스템 정비를 위하여 상수도관로에 영향을 미치는 수리 및 수질 평가를 통합적으로 고려한 보강 우선순위 결정이 필요하다. 따라서 본 연구에서는 상수도 시스템의 구조적, 비구조적 평가 인자를 동시에 고려한 시스템 보강 우선순위 선정을 위한 통합평가 기술을 제안하였다. 보강 우선순위 선정을 위하여 실제 상수도관로가 설치된 지역을 대상으로 상수도관로의 수리. 수질, 관 상태 등의 구조적 인자와 중요시설, 단수 시 피해인구 등의 비구조적 인자를 고려한 통합평가를 수행하였다. 구조적 인자 중 수리 및 수질 인자는 수리해석기법을 이용하여 기준치 통과 여부에 따라 평가하였으며 상수도관로의 관 상태는 관로의 제원, 매설 깊이, 노후도 등의 기준으로 평가하였다. 이러한 평가를 바탕으로 우선순위 선정을 위해 다기준의사결정법을 이용하여 상수도관로의 보강 우선순위를 선정하였다. 본 통합평가는 상수도관로의 구조적, 비구조적 위험도를 정량적으로 인지할 수 있을 뿐만 아니라 비구조적 인자를 고려하여 기존의 평가방법보다 더 신뢰할 수 있는 결과를 제공한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.727-728
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• 2017

Recently, various accidents caused by reagents in laboratories have demanded a safety management system suitable for the danger situation. The existing system operated the equipment according to the temperature and humidity change inside the reagent cabinet, but the operation of the device corresponding to the danger situation and the countermeasures against many dangerous situations are insufficient. In order to solve this problem, this paper proposes a reagent cabinet safety management system based on the reagent cabinet danger priority in happen of accidents caused by reagents under management. The danger priority is type of reagents and selected by the danger situation that can be caused by the reagents. If a danger situation occurs, operate the device according to the selected danger priority and the type of danger situation. It is considered that the reagent cabinet can be safely managed by checking the danger situation in the reagent cabinet and operating the device according to the danger priority.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.3
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• pp.585-592
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• 2017

Most sewer lines buried in the city are likely to be collapsed due to serious aging. Also, due to the high concentration of development and high population density and traffic, the collapse of the sewer will cause enormous social and economic damage. Therefore, proactive maintenance is required to prevent accidents caused by deteriorated sewer pipe. In order to utilize limited budget effectively, risk-based prioritization methods should be proposed that simultaneously consider the consequence of failure and the probability of failure. In this study, the method of risk-based prioritization of sewer was examined by reviewing various cases of overseas studies and applied to the urban sub-catchment. First, the impact factors that can be secured through the sewer GIS DB in Seoul were derived, and the weight, sub-criteria, and impact score of each impact factor were determined and the consequence of failure was calculated by weight sum method. In addition, the probability of failure was calculated by dividing the service life by the estimated useful life, and the consequence of failure and the probability of failure were classified into five grades by the Jenks natural breaks classification method. The prioritization method was applied to sub-catchment in the Seoul to derive a risk matrix and a risk grade. As a result, 26% of all subjects were selected as the inspection priority subjects with 4-5 risk grade. Therefore, using the risk-based CCTV prioritization methodology, it will be possible to systematically determine the objects that need investigation first.

• Journal of the Korean Institute of Gas
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• v.17 no.4
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• pp.39-44
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• 2013

There have been large explosions at some chemical plants recently. Accidents in chemical plants have been caused mainly by servicing for maintenance. There is a need to find a key target for effective injury prevention in maintenance. In this paper, facilities were selected as a key target and the risk priority numbers of the facilities were calculated in order to prioritize preventative measures. The research method was based on the followings; the list of the facilities is found through injury analysis. Then, the risk of each facility was calculated by the frequency of accidents and the working day loss through injuries. In addition, the risk of the facilities was calculated again by the frequency and the severity based on knowledge and experience of experts. As a result, the facilities in chemical plant maintenance are ranked in order of high to low risk priority number; reactor, dryer, tank lorry, etc. In the future, special measures and attention should be directed according to the risk priority number during the maintenance of chemical plants.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.217-218
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• 2016

본 연구에서는 화학사고와 관련하여 위험확산 예측기술개발을 위해 필요한 기상관측장비의 설치위치를 공간분석기법을 활용하여 우선순위로 설치되어야 하는 지역 20개소를 선정하였다. 울산전지역을 1km, 5km, 10km 격자망을 생성하여 기존 기상청에서 제공하고 있는 기상정보를 제외하고 울산전역의 상세한 기상관측정보 제공을 위해 필요한 관측개소 개수를 1차적으로 파악하였다. 위험확산 모니터링에 필요한 기상관측장비 설치간격을 결정하고 경제성을 고려하여 통신사 기지국 활용가능성을 검토하였다. 20개의 최종 설치위치를 결정하기 위해 울산지역에서 발생한 화학사고정보를 기반으로 밀도분석을 수행하여 위험지역을 분석하고, 유해화학물질을 취급하는 업소 정보를 수집하여 군집분포를 수행하였으며, 누출사고 발생 시 가장 중요하게 고려되어야 하는 주거지역 분포를 파악하기 위해 밀도분석을 수행하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.700-703
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• 2017

안전 필수 소프트웨어란, 소프트웨어의 결함으로 인해 사고가 일어났을 경우 사용자에게 치명적인 위해를 야기하는 소프트웨어를 의미한다. 안전 필수 소프트웨어는 다양한 산업에서 보편화 되고 있기 때문에 안전성이 확보된 소프트웨어를 사용자에게 제공해야하며, 잠재적인 결함이 사고로 이어질 수 있기에 안전 요소들에 대한 충분한 분석이 필요하다. 요구사항으로부터 위험 요소를 분석할 때에는 결함의 결과만을 보고 위험 등급을 부여하는 한계가 있다. 결함의 결과가 비록 같더라도 각기 다른 원인에 의해서 각기 다른 위험 수준을 갖기 때문이다. 본 논문에서는 각각의 기능들에 대해 안전성을 부여하고 우선순위를 선정하여 위험도가 높은 기능들에 대해서 우선적으로 분석할 수 있는 기법에 대해서 제안한다.

• The KIPS Transactions:PartD
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• v.16D no.5
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• pp.767-790
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• 2009

Setting up a priorityfor an embedded system is greatly significant because a release plan at the early stage of product developments can properly be established through right decision making procedures based on the priorities. For instance, both dependencies among requirements and the aspects of product developers should be considered into the priorities to improve the embedded system. Especially, trade-offs among the requirements, which are quite different depending on H/W and S/W architecture styles they use, should be acknowledged without exception. However, the selection process on the priority has hitherto been fairly systematic in the existing environment where hardware and software are not being considered at once. Therefore, this paper suggests an dependency and aspect-based model and process for the requirements of the priority. For this, the paper analyzes the trade-offs between the requirements depending on the disparate Architecture styles of H/W and S/W, and it also reflects the viewpoints of the developers. For thelast thing, the model and process suggested will be applied to the case of the development of both cell phones and cameras to gain authenticity and reliability. In conclusion, the danger occurring when the release plan is constructed can be minimized by screening the priorities that optimizes the embedded system more explicitly.

• Journal of the Korean Institute of Gas
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• v.22 no.6
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• pp.129-135
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• 2018

For efficiently safety management of city gas pipelines, the City-gas Pipeline Management System(CPMS) has been developed to systematically manage and analyze the data collected from 33 city gas companies and to effectively perform internal and external affairs related to gas safety management. The piping information data uploaded to the CPMS is ranked the risk according to the criteria specified in the KGS Code, and the safety management of the piping has performed close inspection according to the risk ranking. However, the criteria for deriving the risk ranking is very simple and lacks relevant grounds, and the reliability for the determination of the close inspection pipeline is no high due to the redundant rank. Therefore, we developed a risk assessment program based on the Reliability Based Design Assessment(RBDA) methodology and tried to derive a reasonable risk ranking by linking it with the CPMS system.

• Proceedings of the Korea Contents Association Conference
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• 2014.11a
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• pp.61-62
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• 2014

말라리아는 인체에 감염되는 열원충의 종류에 따라 크게 열대열 원충, 삼일열 원충, 사일열 원충, 난형열 원충으로 구분된다. 말라리아는 감염 후 치료시기를 놓칠 경우 사망에 이를 수 있는 위험한 질병이므로 초기 진단을 위한 Rapid Diagnostic Test(RDT) 키트가 중요하다. 기존의 진단키트의 경우, 열대열 말라리아와 삼일열 말라리아를 동시에 검출하여 치료법이 다름에도 불구하고 구분하여 진단하기가 어렵다. 이러한 이유로 본 연구에서는 열대열 말라리아에 특이적인 RDT키트 개발을 위해, PlasmoDB에서 열대열 말라리아 항원 단백질을 얻고 BLAST를 이용하여 열대열 말라리아에 특이적인 항원 단백질 후보군을 얻었다. 이후 감염단계에 따라 우선순위를 정하고 SPpred에서 제공하는 protein solubility prediction을 통해 실험적으로 단백질 발현 가능 여부를 확인한 결과, 최종적으로 histidine-rich protein II, histidine-rich protein III, glycophorin binding protein를 선정하였다. 이들 단백질을 이용한 열대열 말라리아 진단키트 제작은 열대열 말라리아 특이적 진단을 효과적으로 할 수 있다.