• Journal of the Korean Geographical Society
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• v.50 no.3
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• pp.355-373
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• 2015

In this study the factors of fire damage are analyzed through previous research reviews. Local environmental factors as well as those factors attributed to fire damage (number of fire events, number of injured, number of death, economic loss) were selected to compose mutual relationship model. In order to verify this relationship model, official statistics concerning fire damage were collected from 228 local governments and compared with results from previous research. As a result of this comparison four dependent variables and 22 independent variables that affect fire damage were analyzed. Independent variables are divided into human vulnerability factors, physical vulnerability factors, economic vulnerability factors, mitigating factors and local characteristics. To analyze a relationship between selected dependent variables and independent variables, we applied a semi-logarithm model and performed regression analysis. Among the 22 independent variables, the number of the weak to disaster, social welfare service workers, workers in manufacturing industry, and the number of workers in restaurants and bars per 10,000 people show the significant correlation with the number of fire incidence. The number of death from fire is significantly related to two variables which are the number of social welfare service workers per 10,000 and the ratio of commercial area. Damage cost is significantly dependent on the property taxes per 10,000 people. These factors were included in the research model as vulnerability factors (human, physical, economic) and mitigating factors and local characteristics, and the validity of research model was verified. The result could contribute to fire-fighting resource allocation in Korea or they can be utilized in establishing fire prevention policy, which will enhance the national level of fire safety.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.36 no.3
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• pp.385-393
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• 2016

In this study, we analyzed th Cheonggyecheon watershed for urban flood risk index. SWMM model configuration based on each watershed data. And it was set as the final index calculated indicators related to the humanities, social and environmental. Each indicator was standardized and weighted using the Delphi method. Finally, select the danger area through urban flood risk index. Determined 12 indices according to the hazard and vulnerability. Vulnerability is selected the index divided by three factors. 21 watersheds were analyzed through urban flood risk index. The top of three areas of index is Jeongneung 1, Majang, Pil-dong, each index is 0.533, 0.494, 0.381. The lowest index is soongin 0.216. Urban flood risk index developed in this study can be applied to other regions in Korea for establishing national water resources management plan.

• Explosives and Blasting
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• v.27 no.2
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• pp.12-18
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• 2009

Recently, several cases of destruction of old cylindrical silos by explosive demolition method have been reported. This study deals with the subject concerning the pre-weakening of a cylindrical concrete silo for the application of overturning explosive demolition method. In the past, the pre-weakening operation of structure in explosive demolition has been done by use of some empirical methods. These empirical approaches, however, have possibilities of unexpected accidents. In order to provide a guideline for the pre-weakening of cylindrical silos and similar structures, this paper shows the result of a case study, in which the instability of a silo due to pre-weakening is investigated by a numerical structural analysis before actually conducting pre-weakening and demolition operations.

• Proceedings of the Korea Water Resources Association Conference
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• 2011.05a
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• pp.229-233
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• 2011

IT기술의 발달과 함께 최근 유비쿼터스 패러다임이 등장함에 따라 수자원분야의 정보화 환경이 변화하여야 한다는 논의가 활발하다. 빈번하게 발생하고 있는 자연재해에 있어서 주요 치수시설물의 안전모니터링은 새로운 기술의 적극적인 도입과 개발이 필수적이다. 또한 지속적인 수자원 관리 및 활용 고도화를 위해서도 정보화 경쟁력을 제고하고, 높아지는 사용자의 서비스 요구수준을 충족시켜야할 필요가 있다. 본 연구는 제방 및 보(수문)의 안전모니터링 선진화를 위해 다음과 같은 과정으로 연구하였다. 주요 치수시설물의 안전모니터링 요소를 분석하기 위해 붕괴원인 유형에 따른 주요 모니터링 취약성 인자를 도출한다. 취약성 인자 중 제방의 경우 침투, 침식, 월류, 구조물에 의한 붕괴 등에 의한 유형과 보(수문)의 경우 전도, 활동, 부유 등 다양한 관련 붕괴 현상을 검토하여 각각의 발생된 인자 특성별 모니터링이 가능하도록 최적 센서를 도출한다. 이러한 일련의 과정은 과거의 계측기를 통하거나 육안 및 수동적인 모니터링에서 벗어나, IT기술의 통신분야와 융합한 무선센서네트워크를 적용하여 경제성, 효율성, 현실성을 가지는 치수시설물의 모니터링이 가능하도록 하였다. 향후 이러한 USN(Ubiquitous Sensor Network) 등 유비쿼터스의 융합과 IT기술을 활용한 치수시설물 안전모니터링 선진화를 통해 홍수방어 및 관리시스템 구축에 활용되어 인명 및 재산피해를 절감하고 기술수준을 향상시킴으로서 홍수 재해로부터 안전한 국토 건설 및 국민의 삶의 질을 향상시킬 것이다. 또한, 국가 홍수관리 시스템 구축, 치수능력증대, 장래유역단위 통합홍수방어 및 관리기술 개발에 기여할 것으로 판단된다.

• Journal of the Society of Disaster Information
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• v.17 no.4
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• pp.747-754
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• 2021

Purpose: Seismic safety evaluation of a curved bridge must be performed since the curved bridges exhibit the complex behavior rather than the straight bridges, due to geometrical characteristics. In order to conduct the probabilistic seismic assessment of the curved bridge, Seismic fragility evaluation was performed using the uncertainty of the steel material properties of a curved bridge girde, in this study. Method: The finite element (FE) model using ABAQUS platform of the curved bridge girder was constructed, and the statistical parameters of steel materials presented in previous studies were used. 100 steel material models were sampled using the Latin Hypercube Sampling method. As an input ground motion in this study, seismic fragility evaluation was performed by the normalized scale of the Gyeongju earthquake to 0.2g, 0.5g, 0.8g, 1.2g, and 1.5g. Result: As a result of the seismic fragility evaluation of the curved girder, it was found that there was no failure up to 0.03g corresponding to the limit state of allowable stress design, but the failure was started from 0.11g associated with using limit state design. Conclusion: In this study, seismic fragility evaluation was performed considering steel materials uncertainties. Further it must be considered the seismic fragility of the curved bridge using both the uncertainties of input motions and material properties.

• Journal of Korean Society of Disaster and Security
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• v.16 no.2
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• pp.49-56
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• 2023

Impact based forecast refers to providing information on potential socioeconomic risks according to weather conditions, away from the existing weather factor-oriented forecast. Developed weather countries are investing manpower and finances in technology development to provide and spread impact information, but awareness of impact based forecasts has not spread in Korea. In addition, the focus is on disasters such as floods and typhoons, which cause a lot of damage to impact based forecasts, and research on evaluating the impact of vehicle risks due to strong winds in the transportation sector with relatively low damage is insufficient. In Korea, there are not many cases of damage to vehicle conduction caused by strong winds, but there are cases of damage and the need for research is increasing. Road vulnerability is required to evaluate the risk of vehicles caused by strong winds, and the purpose of this study was to calculate the criteria for road vulnerability. The road vulnerability evaluation was evaluated by the altitude of the road, the number of lanes, the type of road. As a result of the analysis, it was found that the vulnerable area was well reproduced. It is judged that the results of this study can be used as a criterion for preparing an objective evaluation of potential risks for vehicle drivers.

• Annual Conference on Human and Language Technology
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• 2023.10a
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• pp.633-637
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• 2023

암시적 비윤리 표현은 명시적 비윤리 표현과 달리 학습 데이터 선별이 어려울 뿐만 아니라 추가 생산 패턴 예측이 까다롭다. 고로 암시적 비윤리 표현에 대한 언어 모델의 감지 능력을 기르기 위해서는 모델의 취약성을 발견하는 연구가 반드시 선행되어야 한다. 본 논문에서는 암시적 비윤리 표현에 대한 표기 변경과 긍정 요소 삽입이라는 두 가지 변형을 통해 모델의 예측 변화를 유도하였다. 그 결과 모델이 야민정음과 외계어를 사용한 언어 변형에 취약하다는 사실을 발견하였다. 이에 더해 이모티콘이 텍스트와 함께 사용되는 경우 텍스트 자체보다 이모티콘의 효과가 더 크다는 사실을 밝혀내었다.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.12a
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• pp.91-96
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• 2003

업무 편의성 요구 증가와 웹 서비스의 발전으로 웹 기반 원격근무 업무 시스템이 증가하고 있는 반면, 웹 취약점의 확산과 개방형 환경으로 인해 잠재적 위협이 증가되고 있다. 이러한 위협에 적절히 대응하기 위해서는 개발 단계 전반에서 보안 요소를 고려하여 안전한 업무 시스템을 구축해야 한다. 이를 위해 본 논문에서는 업무 시스템이 요구하는 보안 수준에 부합하는 보안 목표를 설정하고, 요구 보안 수준을 충족할 수 있도록 전체 개발 프로세스 상의 보안 관리 활동을 정의한다. 또한, 신원 인증 및 접근제어, 세션 관리, 이벤트 로깅, 데이터 검증, 알려진 취약점 대응, 그리고 프라이버시 보호와 같은 보안 요소들을 분석하여 시스템의 안전한 구축 방법을 제시한다.

• Economic and Environmental Geology
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• v.34 no.4
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• pp.385-394
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• 2001

There are serious damage of people and properties every year due to landslides that are occurred by heavy rain. Because these phenomena repeat and the heavy rain is not an atmospheric anomaly, the counter plan becomes necessary. The study area, Ulsan, is one of the seven metropolitan, and largest cities of Korea and has many large facilities such as petrochemical complex and factories of automobile and shipbuilding. So it is necessary assess the landslide hazard potential. In the study. the three steps of landslide hazard assessment techniques such as susceptibility, possibility, and risk were performed to the study area using GIS. For the analyses, the topographic, geologic, soil, forest, meteorological, and population and facility spatial database were constructed. Landslide susceptibility representing how susceptible to a given area was assessed by overlay of the slope, aspect, curvature of topography from the topographic DB, type, material, drainage and effective thickness of soil from the soil DB, lype age, diameter and density from forest DB and land use. Then landslide possibility representing how possible to landslide was assessed by overlay of the susceptibility and rainfall frequency map, Finally, landslide risk representing how dangerous to people and facility was assessed by overlay of the possibil. ity and the population and facility density maps The assessment results can be used to urban and land use plan for landslide hazard prevention.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.05a
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• pp.664-668
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• 2005

ERP(Enterprise Resource Planning) 시스템은 급여, 회계, 인사, 생산, 판매, 물류 등을 포함한 핵심 비즈니스 프로세스를 담고 있는 소프트웨어이다. 인터넷의 등장으로 ERP 시스템이 WEB 기반으로 전환되었고 ERP의 영역도 기업내부에 국한된 것이 아니라 기업간의 거래를 모두 포함하기에 이르렀다. 그러나 ERP 시스템은 회사의 중요한 의사결정 데이터들과 한 Application 안에서 일어나는 Transaction 처리 등의 정보 보안에 대한 취약성을 가지고 있다. 이에 ERP 시스템에도 보안에 대한 필요성이 대두되었으나 ERP 업체들의 대다수는 아직도 구체적인 보안에 대한 방안을 제시하지 않고 있는 실정이다. 결국 비즈니스의 성공도 취약한 기업의 자원을 인증되지 않은 다른 사용자로부터 보호하는 능력에 달려 있으며, 이 연구의 목적은 ERP 시스템의 보안 이슈를 어떻게 다룰 것이며, ERP 보안 요구 사항을 어떻게 모델링 할 것인가에 대한 연구 이다. 현재 나와있는 SAP R/3와 EAGLE ERP의 제품 보안 모델을 비교함으로써 외산 제품과 국산 제품의 보안 요구 사항을 분석 하고, ERP시스템 보안에 대한 고려사항 및 접근 방법을 모델링 할 것이다. 본 연구에서는 UML을 이용하여 ERP 시스템 안에서 찾을 수 있는 모든 보안 사항을 점검 하고,UML의 물리적 요소와 논리적 요소를 이용함으로써 ERP 보안을 모델링 하고자 한다. 이 논문을 통하여 ERP 시스템의 각 분야의 담당자가 ERP 보안을 개념적으로 접근 할 수 있도록 할 것이다. 차후 연구 과제는 좀더 구체적인 모델링을 통한 ERP 보안 solution 개발이다.