• Journal of Navigation and Port Research
• /
• v.41 no.3
• /
• pp.93-102
• /
• 2017

When VTSOs (Vessel Traffic Service Operator) determine the degree of collision risk for two vessels, they consider comprehensive information about each vessel's course, speed, DCPA, TCPA, and encountering situation. In this study, we proposed a utility function based on the risk attitudes of VTSOs toward the Risk Index (RI). The RI was calculated using the risk of encounter, the risk of approach, and the risk of time for two vessels in order to predict each ship's collision risk from the VTS viewpoint. We obtained each coefficient of the RI and the risk attitude through a survey of collision risks among VTSOs of Korea. In order to verify whether the proposed utility is reasonable, we validated by applying the degree of collision risk to some historical cases of accidents in Busan port along with the Ship of ES value($ES_S$) of ES(Environmental Stress) model.

• Journal of the Korean GEO-environmental Society
• /
• v.20 no.2
• /
• pp.5-18
• /
• 2019

In this study, it was conducted a broad-area landslide analysis for the entire area of Kyungsangbuk-do Province based on spatially-distributed wetness index and root reinforcement infinity slope stability theory. Specifically, digital map, soil map and forest map were used to extract topological and geological parameters, and to build spatially-distributed database at $10m{\times}10m$ resolution. Infinity flow direction method was used for rain catchment area to produce spatially-distributed wetness index. The safety level that indicates risk of a broad-area landslide was classified into four groups. The result showed that areas with a high estimated risk of a landslide coincided with areas that recently went through an actual landslide, including Bonghwa and Gimcheon, and unstable areas were clustered around mountainous areas. A comparison between the estimation result and the records of actual landslide showed that the analysis model is effective for estimating a risk of a broad-area landslide based on accumulation of reasonable parameters.

• Proceedings of KHEA Conference
• /
• 2004.04a
• /
• pp.187-187
• /
• 2004

• Journal of the Korean GEO-environmental Society
• /
• v.15 no.6
• /
• pp.67-73
• /
• 2014

Landslide disasters including debris flows are the one of the most frequent natural disasters in Korea, and losses of lives and property damages due to these catastrophic events have been increased every year. Various mitigation programs and related policies have been conducted in order to respond and prepare landslide disasters. Most landslide reduction programs are, however, focused on recovery actions after the disasters and lead to unrealistic consequences to the affected people and their properties. The main objective of this study, therefore, is to evaluate the landslide hazard based on the identification of geomorphological features, which is for the preparedness of the landslide disasters. Two methodologies, SINMAP and vector dispersion analyses are used to simulate those characteristics where landslides are actually located. Results showed that both methods well discriminate geomorphic features between stable and unstable domains. This proves that geomorphological characteristics well describe a relationship with the existing landslide hazard. SINMAP analysis which is based on the consecutive model considering external factors like infiltration is well identify the landslide hazard especially for debris flow type landslides rather than vector dispersion focusing on a specific area. Combining with other methods focusing specific characteristics of geomorphological feature, accurate landslide hazard assessments are implemented.

• Journal of Korean Society of Disaster and Security
• /
• v.16 no.4
• /
• pp.67-74
• /
• 2023

In this study, the risk of landslides was analyzed for planned development sites in mountainous areas. Field survey was conducted on the research area with the slope and valley site. The criteria for evaluating the risk of landslides in the field survey were based on the risk assessment table of the Korea Forest Service Notice No. 2023-10. The research area has 13 slopes and 11 valleys. As a result of evaluating the risk area, two slopes and two valley were found to be dangerous sites in each. Numerical simulation was performed on the investigated risk areas to predict the spread of damage. The debris flow was simulated to have an affect on roads and buildings located in the lower part of the basin, and it was determined that a disaster prevention facility was nacessary to minimize damage. This information can be used to determine the impact of disasters before carrying out mountain development.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.15 no.8
• /
• pp.5310-5317
• /
• 2014

Landslides occur in Korea every year because it has numerous mountainous regions and approximately two-thirds of the annual rainfall falls in Summer. Therefore, it is important to predict potential areas of landslides and minimize the damage in advance to protect property and human life. Therefore, in the present study, the potential danger areas were extracted from a digital map, digital forest map, digital forest site environmental map, and digital geologic map to estimate the landslide hazard. In addition, the assessment of landslide danger was analyzed by first and second estimations based on the criteria from the Korea Forest Research Institute using a GIS technique, which was finally judged by a field investigation.

• Journal of Digital Convergence
• /
• v.18 no.10
• /
• pp.517-526
• /
• 2020

This study aimed to understand the effects on preventive behavior intention to particulate matter by risk perception attitude and anxiety. Also, to expand applicable target and range of RPA model, add anxiety. To measure main variables of RPA model, did a survey with 570 college students. With a data, analyzed by correlation, one-way ANOVA and three-way ANOVA. As a result, perceived risk and efficacy effect on intention to preventive action and information seeking. And an anxiety factor effects on intention to preventive action and information seeking also. And distinguished 4 groups of RPA model, there were meaningful differences between intention to preventive action and information seeking by groups, and a factor of anxiety effects certain groups. As a result, it can suggest how to plan and enforce message on preventive campaign of particulate matter. In follow research, with social psychological factors, it will helpful to identify health activities about particulate matters.

• Journal of the Korean Home Economics Association
• /
• v.43 no.7 s.209
• /
• pp.147-158
• /
• 2005

This study investigated the relations of adolescents' attitudes toward risk behaviors, perceived benefits and costs, and their risk behaviors. The subjects were 955 high school freshmen in the Daegu$\cdot$Kyungpook area. The major findings were as follows. (1) Adolescents' attitudes toward risk behaviors were positively associated with the perceived benefits of adolescent risk behaviors, but these were negatively associated with the perceived costs of adolescent risk behaviors. (2) Compared to boys, girls had more positive attitudes toward adolescent drinking. In addition, girls perceived more benefits but less costs of adolescent risk behaviors than did boys. (3) There were no gender differences in the relationships between dependent variables and adolescent risk behaviors.

• Proceedings of the Korea Contents Association Conference
• /
• 2014.11a
• /
• pp.107-108
• /
• 2014

본 연구는 브랜드에 대한 소비자의 태도 변화를 유도할 수 있는 브랜드 광고 전략을 모색하기 위한 선행연구로써, 연구 목적은 소비자 태도 변화의 결정 요인 중 하나인 관여도가 인쇄광고에 어떻게 표현 되었고, 소비자의 요구가 이에 상응하는지에 대해 분석하는 것이다. 관여도의 3가지 결정 요인 중 브랜드에 대한 신념 형성에 영향력이 높은 제품 요인 중 지각위험 요소를 연구범위로 제한하고, 국내 화장품 4개 브랜드의 인쇄광고를 대상으로 활용 빈도에 대한 분석을 실시하였다. 분석 결과를 토대로 한 설문을 실시하여, 인쇄광고에서 사용하는 지각위험요소와 사용자가 요구하는 지각 위험요소에 대한 중요도와 차이를 도출하였다.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2019.05a
• /
• pp.296-296
• /
• 2019

전 세계적으로 기후변화로 인한 국지성 집중호우 및 태풍으로 인한 피해가 지속적으로 발생하고 있으며, 그에 따른 2차 피해인 산사태 및 토석류 피해 또한 증가하고 있는 추세이다. 최근 국내의 산사태 및 토석류에 대한 선행연구는 지속적으로 수행되고 있으나, 산사태 및 토석류 위험성이 높은 구간, 즉, 발생기작을 판단할 수 있도록 지표화 해놓은 것이며, 현재 피해예측지도 및 피해 하류부의 시설물을 고려한 연구는 미비한 실정이다. 따라서 본 연구에서는 강우-유출모형인 S-RAT모형 및 토석류 수치해석 프로그램 RAMMS 모형을 이용하여 산사태 및 토석류 피해를 극대화 시키는 인자인 토석유동심(H), 토석유속(V)을 이용하여 토석류피해예측지도를 작성하였으며, 피해 하류부의 시설물을 건물 유형별 시설물의 중요도로 구분하였다. 또한 작성된 피해예측지도 및 시설물 중요도를 중첩하여 위험성 지도를 제시하였다.