• 한국해양공학회지
• /
• 제28권1호
• /
• pp.69-76
• /
• 2014

Survivability assessments and vulnerability reductions are required in warship design. A warship's survivability is assessed by its susceptibility, vulnerability, and recoverability. In this paper, an integrated survivability assessment for a warship subjected to multiple hits is introduced. The methodology aims at integrating a survivability assessment into an early stage of warship design. The hull surface is idealized using typical geometries for RCS (Radar Cross Section) detection probability and susceptibility. The Vulnerability is evaluated by using the shot-line. The recoverability is estimated using a survival time analysis. This enables the variation of survivability to be assessed. Several parameters may be varied to determine their effects on the survivability. The susceptibility is assessed by the probability of detecting the radar cross section of the subject and the probability of being hit based on a probability density function. The vulnerability is assessed by the kill probability based on the vulnerable area of critical components, according to the component's layout and redundancy. Recoverability is assessed by the recovery time for damaged critical components.

• 한국전산구조공학회논문집
• /
• 제27권6호
• /
• pp.485-492
• /
• 2014

자연재해에 있어서 취약성 분석계획의 우선순위 설정활동을 위한 기초자료로서 재해 위험분석의 주요한 요소이다. 화산폭발은 화산이 인구밀도가 높은 지역에 위치하고 있는 경우 많은 사상자와 재산피해를 야기한다. 화산폭발을 막을 수 없지만, 위험도와 취약성은 미래의 위기를 예측하는 신중한 계획과 준비작업을 통해 저감될 수 있다. 사회적 불평등으로서 사회적 취약성은 다양한 사회 구성원이 재해에 대응 능력에 민감한 영향을 미친다. 본 연구에서는 인도네시아 중부 자바에 위치한 메라피 화산 인근 지역주민들의 사회적 취약성을 평가하기 위하여 사회적 취약성 지수(SoVI) 기법을 활용하였다. SoVI는 사회적 위험부담을 이해하고 정량화하기 위하여 지역사회의 복원탄력성에 영향을 미치는 사회 경제적 및 인구 통계학적 요인을 이용하여 평가된다. 본 연구에서 사회적 취약성은 이해 관계자와 지역주민과의 설문조사를 통해 평가되었다. 연구결과로 도출된 취약성 지수는 사회적 취약성의 분포와 원인에 대한 정보를 반영함을 확인하였다.

• 한국멀티미디어학회논문지
• /
• 제18권2호
• /
• pp.199-206
• /
• 2015

Since security vulnerabilities newly discovered in a popular Web browser immediately put a number of users at risk, urgent attention from developers is required to address those vulnerabilities. Analysis of characteristics in the Web browser vulnerabilities can be used to assess security risks and to determine the resources needed to develop patches quickly to handle vulnerabilities discovered. So far, being a new research area, the quantitative aspects of the Web browser vulnerabilities and risk assessments have not been fully investigated. However, due to the importance of Web browser software systems, further detailed studies are required related to the Web browser risk assessment, using rigorous analysis of actual data which can assist decision makers to maximize the returns on their security related efforts. In this paper, quantitative software vulnerability analysis has been presented for major Web browsers with respect to the Common Vulnerability Scoring System. Further, vulnerability discovery trends in the Web browsers are also investigated. The results show that, almost all the time, vulnerabilities are compromised from remote networks with no authentication required systems. It is also found that a vulnerability discovery model which was originally introduced for operating systems is also applicable to the Web browsers.

• 한국기후변화학회지
• /
• 제3권1호
• /
• pp.1-12
• /
• 2012

기후변화에 의한 기상이변으로 현 세대와 미래세대가 직면하게 될 악영향을 최소화하기 위한 적응 조치의 기초 자료로 활용하기 위해 본 연구는 전국을 대상으로 한 '물 관리 취약성 평가'를 실시하였다. 취약성 평가는 치수와 이수로 나누어 평가하였으며, 각 부문에 해당하는 대용변수를 선정하여 현재는 2000년, 미래는 A1B 시나리오를 기준으로 하여 2020년, 2050년, 2100년에 대한 자료를 취합하였다. 취합된 자료는 표준화 과정을 거쳐 델파이 조사에서 도출된 가중치를 고려하여 취약성을 산정하였다. 치수 취약성은 적응능력에 대한 기여도가 가장 크게 나타났으며, 미래기후에 대한 분석을 통해 강원도 일부 지역에서 취약성이 증가하는 것으로 나타났다. 이수에 대한 취약성은 기후 노출에 가장 큰 영향을 받는 것으로 나타났으며, 충청북도와 대전, 대구광역시, 경상남도 일부 내륙지역의 경우 2020년에 증가하는 추세를 보였다. 본 연구는 전국을 대상으로 하여 상대적인 취약성을 평가하고 공간적인 분포를 살펴볼 수 있다는 점에서 지자체가 기후변화 적응 세부시행대책을 수립함에 있어서 어떤 부문에 더욱 투자해야 하는지를 파악하는데 도움을 줄 수 있다.

• 한국지하수토양환경학회:학술대회논문집
• /
• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
• /
• pp.459-462
• /
• 2004

This study assesses groundwater vulnerability to contaminants in 12 administrative districts of the city of Changwon, using DRASTIC technique. DRASTIC was originally applied to situations in which the contamination sources are at the ground surface, and the contaminants flow into the groundwater with infiltration of rainfall. However, groundwater contamination in urban areas can also be related to excessive pumping resulting in a lowering of the water level. The correlation coefficient between minimum DRASTIC indices and the degree of poor water quality for 10 districts is low as 0.40. The correlation coefficients between minimum DRASTIC indices and the groundwater discharge rate, and between minimum DRASTIC indices and well density per unit area are 0.70 and 0.87, respectively. Thus, to evaluate the potential of groundwater contamination in urban areas, it is necessary to consider other factors such as groundwater withdrawal rate and well density per unit area with ratings and weights as well as the existing six DRASTIC factors.

• 한국지형학회지
• /
• 제17권2호
• /
• pp.29-39
• /
• 2010

기후변화는 바람아래 조간대 지역에서 해수면의 급격한 상승을 야기하며, 여러 가지 사회·경제적 영향을 미친다. 따라서 본 연구에서는 바람아래 조간대 지역의 해수면 상승에 따른 취약성을 평가하고자 하였다. 다중시기 위성영상과 GIS기법을 이용하여 먼저 바람아래 조간대 지역의 DEM을 추정하고, 이를 통해 IPCC SERS 시나리오별 조간대 침수지역을 확인하고자 한다. 연구결과, 해수면이 20cm 상승하면 약 68ha의 간석지가 침수되고, 30cm 상승하면 85ha, 40cm가 상승하면 103ha, 50cm 상승 시 121ha, 60cm 상승 시 139ha의 간석지가 침수됨을 분석할 수 있었다. 해수면 상승의 영향을 가장 크게 받는 지역은 태안군 고남면 고남리 가경주 마을 전면에 위치한 간석지로, 상대적으로 간석지의 고도가 낮고 경사가 완만하기 때문이다. 침수 예상지역의 간석지는 현재 주민들이 굴과 바지락 등을 양식하고 있어서, 향후 기후변화에 의한 해수면 상승에 따른 경제적 피해가 점차 커질 것으로 예상된다.

• 농촌계획
• /
• 제19권3호
• /
• pp.51-59
• /
• 2013

The objective of this study was to make a map of farmland vulnerability to flood inundation based on morphologic characteristics from the flood-damaged areas. Vulnerability mapping based on the records of flood damages has been conducted in four successive steps; data preparation and preprocessing, identification of morphologic criteria, calculation of inundation vulnerability index using a fuzzy membership function, and evaluation of inundation vulnerability. At the first step, three primary digital data at 30-m resolution were produced as follows: digital elevation model, hill slopes map, and distance from water body map. Secondly zonal statistics were conducted from such three raster data to identify geomorphic features in common. Thirdly inundation vulnerability index was defined as the value of 0 to 1 by applying a fuzzy linear membership function to the accumulation of raster data reclassified as 1 for cells satisfying each geomorphic condition. Lastly inundation vulnerability was suggested to be divided into five stages by 0.25 interval i.e. extremely vulnerable, highly vulnerable, normally vulnerable, less vulnerable, and resilient. For a case study of the Jinju, farmlands of $138.6km^2$, about 18% of the whole area of Jinju, were classified as vulnerable to inundation, and about $6.6km^2$ of farmlands with elevation of below 19 m at sea water level, slope of below 3.5 degrees, and within 115 m distance from water body were exposed to extremely vulnerable to inundation. Comparatively Geumsan-myeon and Sabong-myeon were revealed as the most vulnerable to farmland inundation in the Jinju.

• Earthquakes and Structures
• /
• 제11권4호
• /
• pp.629-648
• /
• 2016

This paper deals with 111 buildings built between 1962 and 1987, from various parts of the city of Osijek, for which, through the collection of documentation, a database is created. The aim of this paper is to provide the first steps in assessing seismic risk in Osijek applying method based on vulnerability index. This index uses collected information of parameters of the building: the structural system, the construction year, plan, the height, i.e., the number of stories, the type of foundation, the structural and non-structural elements, the type and the quality of main construction material, the position in the block and built-up area. According to this method defining five damage states, the action is expressed in terms of the macroseismic intensity and the seismic quality of the buildings by means of a vulnerability index. The value of the vulnerability index can be changed depending on the structural systems, quality of construction, etc., by introducing behavior and regional modifiers based on expert judgments. Since there is no available data of damaged buildings under earthquake loading in our country, we will propose behavior modifiers based on values suggested by earlier works and on judgment based on available project documentation of the considered buildings. Depending on the proposed modifiers, the seismic vulnerability of existing buildings in the city of Osijek will be assessed. The resulting vulnerability of the considered residential buildings provides necessary insight for emergency planning and for identification of critical objects vulnerable to seismic loading.

• 한국수자원학회논문집
• /
• 제48권8호
• /
• pp.647-657
• /
• 2015

본 연구는 국내 12개수계인 한강, 안성천, 금강, 삽교천, 영산강, 섬진강, 탐진강, 만경강, 동진강, 낙동강, 태화강, 형산강 유역에 대한 물이용 취약성 평가를 실시하였다. SWAT(Soil and Water Assessment Tool) 모형을 이용하여 국내 12개 수계의 연유출량을 도출하였고, 각 유역별 면적 및 인구당 유출량을 비교하였다. 취약성 평가를 위해 18개 지표로 구성하였고, 물이용의 수요, 손실 및 공급의 측면으로 구분하였다. 이때의 가중치는 객관적 가중치의 적용을 위해 엔트로피(Entropy)방법을 사용하였고 정량적인 물이용 취약성 평가를 위해 다기준 의사결정기법 중 하나인 TOPSIS(Technique for Order of Preference by Similarity to Ideal Solution) 기법을 적용하였다. 그 결과, 형산강의 물이용이 가장 취약하였고, 삽교천, 동진강, 섬진강, 안성천, 만경강, 낙동강, 탐진강, 영산강, 금강, 태화강, 한강 순이었다. 본 연구 결과는 향후 기후변화 취약성 평가를 위한 지표 개발에 이용할 수 있겠다.

• 한국농공학회논문집
• /
• 제60권6호
• /
• pp.33-42
• /
• 2018

This study evaluated the vulnerability of irrigation water supplied to the crops. The target areas were selected as Dangjin-si, Yesan-gun, and Cheongyang-gun. The survey items of the climate exposure were annual precipitation and rainless days. The sensitivity survey items were cultivation area, groundwater level, evapotranspiration and groundwater consumption. The survey items of the adaptability were Number of groundwater well and Water supply ratio. The survey methods for these items were investigated in a variety of ways, including "National Climate Data Service System", "Korean Statistical Information Service", "National ground water monitoring network in korea annual report" and "Chungcheongnam-do Statistical Yearbook", "HOMWRS". Vulnerability assessment results were rated within the range of 0~100 points. The first grade was rated 0-25, the second grade 26-50, the third grade 51-75, and the fourth grade 76-100. And the lower the score, the lower the vulnerability. As a result, Cheongyang-gun showed a high vulnerability of over 50 points, Dangjin-si showed a low vulnerability rating of 31.20 points and a Yesan-gun of 36.00 points.