• Journal of Information Technology Applications and Management
• /
• 제14권3호
• /
• pp.95-113
• /
• 2007

To minimize IT operational risks and the opportunity cost for lost business hours. it is necessary to have preparedness in advance and mitigation activities for minimization of a loss due to the business discontinuity. There are few cases that banks have a policy on systematic management, system recovery and protection activities against system failure. and most developers and system administrators response based on their experience and the instinct. This article focuses on the mitigation model development for minimizing the incidents of disk unit in IT operational risks. The model will be represented by a network model which is composed of the three items as following: (1) the risk factors(causes, attributes and indicators) of IT operational risk. (2) a periodic time interval through an analysis of historical data. (3) an index or an operational regulations related to the examination of causes of an operational risk. This article will be helpful when enterprise needs to hierarchically analyze risk factors from various fields of IT(information security, information telecommunication, web application servers and so on) and develop a mitigation model. and it will also contribute to the reduction of operational risks on information systems.

• 한국화재소방학회논문지
• /
• 제24권2호
• /
• pp.9-20
• /
• 2010

본 연구는 아직 초보수준인 국내기업의 업무연속성 유지를 위한 재해경감 활동계획 수립 및 실행에 대한 방향을 제시하였으며, 조기대응체계 구축을 통하여 어떠한 재난에도 안전을 기할 수 있는 기업 연속성 유지 방안을 모색하였다. 이를 실현하기 위하여 국내 재난관리 표준으로 채택된 사고대비 및 업무연속성 관리의 가이드라인을 분석하였고, 국내기업에 쉽게 적용할 수 있는 실행지침을 제시하였으며, A기업을 대상으로 재해경감활동계획 수립 및 정보기술을 활용하는 방안을 연구하였다. 특히 사고대비 및 업무연속성 관리의 가이드라인 5단계 주요 절차 중 계획수립단계의 위험 평가, 영향분석, 예방경감계획 및 대응관리계획 수립에 대한 모델을 제시하였고, 국내 재해경감활동이 활성화되기 위한 방안을 도출하였으며, 재난대응 수준을 향상시키기 위하여 필요한 정보기술 부분도 제시하였다.

• 정보처리학회논문지D
• /
• 제14D권6호
• /
• pp.689-700
• /
• 2007

정보시스템 운영리스크를 최소화하고, 장애시간 동안의 영업기회 손실비용 규모를 줄이기 위해서는 장애의 예방과 사전준비가 필요하다. 그런데 장애가 발생할 경우, 대부분의 기업에서는 장애발생 직후에 대응과 복구 조치를 취하고 있다. 프로그램 개발자나 시스템운영자들은 과거의 경험과 직관에 의존하여 장애를 관리하고 있을 뿐, 장애를 체계적으로 관리하고 사전에 예방하는 사례를 찾아보기가 힘든 실정이다. 본 논문은 정보시스템 운영리스크의 관점에서, 디스크 장애예방을 위한 피해저감모델의 개발에 초점을 맞추었다. 연구모델은 디스크장치에서 정보시스템 운영리스크가 발생하는 위험원인, 그리고 이러한 원인들을 사전에 점검하는 점검주기, 점검에 필요한 운영규정으로 구성된다. 또한 정보시스템 부문의 하드웨어 장애요인 중에서 가장 크게 나타나고 있는 디스크 장애에 대하여 피해저감모델을 적용함으로써 활용 가능성을 보여 준다.

• Nuclear Engineering and Technology
• /
• 제54권1호
• /
• pp.152-161
• /
• 2022

We analyzed mitigation strategies for steam generator tube rupture (SGTR) accidents using MARS code under both full-power and low-power and shutdown (LPSD) conditions. In general, there are two approaches to mitigating SGTR accidents: supplementing the reactor coolant inventory using safety injection systems and depressurizing the reactor coolant system (RCS) by cooling it down using the intact steam generator. These mitigation strategies were compared from the viewpoint of break flow from the ruptured steam generator tube, the core integrity, and the possibility of the main steam safety valves opening, which is associated with the potential release of radiation. The "cooldown strategy" is recommended for break flow control, whereas the "RCS make-up strategy" is better for RCS inventory control. Under full power, neither mitigation strategy made a significant difference except for on the break flow while, in LPSD modes, the RCS cooldown strategy resulted in lower break and discharge flows, and thus less radiation release. As a result, using the cooldown strategy for an SGTR under LPSD conditions is recommended. These results can be used as a fundamental guide for mitigation strategies for SGTR accidents according to the operational mode.

• Journal of Positioning, Navigation, and Timing
• /
• 제13권2호
• /
• pp.131-136
• /
• 2024

This paper deal with a method for calculating the continuity of Korea Augmentation Satellite System (KASS), which was completed in Korea in December 2023, and a plan to respond in the event that a continuity hazard situation occurs during operation. For this purpose, the International Civil Aviation Organization (ICAO) Satellite Based Augmentation System (SBAS) continuity standards, Wide Area Augmentation System (WAAS), and European Geostationary Navigation Overlay Service (EGNOS) continuity cases are examined in this paper. According to the measures recommended by the ICAO, when the number of continuity risks exceeds a certain level and the level drops drastically, various mitigation operations by country are implemented. Through this, if KASS does not meet ICAO continuity standards in the future, such measures can be referred to. In addition, this paper computes the short-term KASS continuity during the test broadcast period. Although continuity does not meet the ICAO standards, although this test period is too short, further meaningful analysis in the future is required. Additionally, this paper carried out an analysis of the timing and period to systematically calculate the meaningful value of continuity.

• 한국방재학회 논문집
• /
• 제6권4호통권23호
• /
• pp.21-28
• /
• 2006

이 연구는 특정소방대상물의 소방시설에 대한 자체점검을 수행하는 소방시설관리사의 운용실태를 분석하고 개선방안을 제시하였다. 도시 공설소방서비스로 소방검사를 보완하는 자체점검을 수행하는 소방시설관리사를 대상으로 직무환경, 제도환경, 운용환경 등에 대해 설문조사를 실시하여 소방시설관리사제도의 운용실태에 대한 문제점을 실증적으로 파악하였다. 연구에 나타난 결과는 자체점검에 대한 법적 제도적 장치미비로 건물주와 소방검사원 그리고 소방시설관리사 상호간에 갈등이 있는 것으로 나타나 제도정착을 위해서는 상호보완 협력적 관계를 정립해야 할 것으로 나타났다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2002년도 Proceedings of International Symposium on Remote Sensing
• /
• pp.175-182
• /
• 2002

The paper introduces the application of flood monitoring and assessment by remote sensing and GIS in china and describes the frame of operational system for practical performance of flood disaster mitigation. In addition, The operational system for flood monitoring and assessment in RSTAC/ MWR and its application in the floods of 1998,1999 in china are introduced.

• 무역상무연구
• /
• 제64권
• /
• pp.239-264
• /
• 2014

Two types of responses to climate change exist. First is climate mitigation which includes efforts of reducing CO2 and GHG emissions. Second response is climate adaptation process which is establishing climate resilience in the supply chain. The two are inherently different since mitigation strategy focus on eliminating the source of climate change and is long term in nature but adaptation strategy is moderating the impact of potential or current climate change. In order to embed climate resilience in the supply chain, mitigation strategies and adaption strategies must be implemented simultaneously. Corporation's adaptation to climate change related natural disaster can be seen as a response that includes mitigation and adaptation strategies simultaneously. A comprehensive climate change resilience supply chain approach has to be developed. This paper illustrated guidelines and adaptation process framework businesses can utilize in order to build climate resilience. Screening process before the actual assessment of risk was introduced as well as the whole adaptation process of establishing information system and strengthening climate-related operational flexibility.

• Smart Structures and Systems
• /
• 제33권3호
• /
• pp.189-199
• /
• 2024

To properly extract the strain components under varying operational conditions is very important in bridge health monitoring. The abnormal sensor readings can be correctly identified and the expected operational performance of the bridge can be better understood if each strain components can be accurately quantified. In this study, strain components under varying load conditions, i.e., temperature variation and live-load variation are evaluated based on field strain measurements collected from a real concrete box-girder bridge. Temperature-induced strain is mainly regarded as the trend variation along with the ambient temperature, thus a smoothing technique based on the wavelet packet decomposition method is proposed to estimate the temperature-induced strain. However, how to effectively extract the vehicle-induced strain is always troublesome because conventional threshold setting-based methods cease to function: if the threshold is set too large, the minor response will be ignored, and if too small, noise will be introduced. Therefore, an autoencoder framework is proposed to evaluate the vehicle-induced strain. After the elimination of temperature and vehicle-induced strain, the left of which, defined as the model error, is used to assess the operational performance of the bridge. As empirical techniques fail to detect the degraded state of the structure, a clustering technique based on Gaussian Mixture Model is employed to identify the damage occurrence and the validity is verified in a simulation study.

• 한국환경복원기술학회지
• /
• 제26권6호
• /
• pp.21-32
• /
• 2023

The Environmental Impact Assessment (EIA) plays a pivotal role in predicting the potential environmental impacts of proposed developments and planning appropriate mitigation measures to minimize effects on species. However, as concerns over biodiversity loss rise, there's ongoing debate about the efficacy of these mitigation plans. In this study, we utilized data from EIAs and post-environmental impact surveys to understand the trends in biodiversity during construction and operation phases. By examining 30 urban development projects, we categorized species richness indices of mammals, birds, amphibians, and reptiles into pre-construction, during construction, and post-construction operational stages. The biodiversity trends were analyzed based on the rate of change in these indices. The results revealed three distinct biodiversity change patterns: (A) An initial increase in biodiversity indices post-development, followed by a gradual decline over time; (B) a sustained increase in biodiversity as a result of mitigation measures; and (C) a continuous decline in biodiversity post-development. Furthermore, all species exhibited a higher rate of biodiversity decline during the construction phase compared to the operational phase, with mammals showing the most significant rate of change. Notably, the biodiversity change rate during operation was generally lower than during construction. In particular, mammals seemed to be most influenced by mitigation measures, displaying the smallest rate of change. This study provides empirical evidence on the efficacy of mitigation measures and deliberates on ways to enhance their effectiveness in minimizing the adverse impacts of urban development on biodiversity. These findings can serve as foundational data for addressing terrestrial biodiversity reduction.