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Moon J.,Texas A&M University | Lee D.,KAIST | Lee T.,KAIST | Ahn J.,KAIST | And 3 more authors.
Systems Engineering | Year: 2015

This paper proposes a group decision framework to model the dependency structure of a complex system based on expert surveys. The proposed framework is designed to systematically populate a dependency matrix whose entry indicates the degree that its row element is influenced by its column element. The degree of dependency is assessed based on two different perspectives - of the influencing element and of the influenced element - and the assessments with the two perspectives are separately compiled and compared in the initial round survey. Entries with large assessment gaps are classified as discussion items and a group decision procedure to reduce the gaps in these items is applied in the consensus round survey. A case study for dependency modeling of critical infrastructures of South Korea was conducted using the proposed framework and its effectiveness was demonstrated. The analysis on the results of the case study discovered an insight that the opinions from the influenced elements are more convincing and respected in the consensus round than those from the influencing elements. © 2015 Wiley Periodicals, Inc.

Byeon S.J.,RO|Innovation | Cho W.S.,RO|Innovation | Lee K.S.,National Disaster Management Institute NDMI | Hwang J.W.,RO|Innovation
International Journal of Control and Automation | Year: 2015

Korea repeatedly experiences floods and droughts that cause traumatic environmental conditions with huge economic impact. With an approach and solution such as Smart Water Grid these problems can be alleviated. Tapping into the retention ponds behind dams, rainfall harvest facilities in urban areas and any other structures installed to store rainfall water during flood events will mitigate the damage of flooding and provide a new source of national water resources. Similarly, purified waste water, ground water and desalinated sea water can also be feasible to use as alternative water resources. In this study, the water balance assessment model is being developed as a Smart Water Grid research. In fact, large proportions of water resources in Korea rely on a river fresh water. Also in the Youngjongdo island, tap water from water purification plant which use original source from the Han river. However the water supply system in the island is quite dangerous since the water purification plant is located in Incheon city and the water comes to island through the sea and no other source is used in the island. Therefore, once the accident at main water pipe in the sea, no water is available in this island. Information on water availability and water needs are crucial to identify hot spots of quantitative pressures on water resources. In this study, all available alternative water sources are calculated by the model developed through this study. Several physical and stochastic models on hydraulic and hydrological approaches are nominated to investigate physical characteristics of catchments. © 2015 SERSC.

Kim Y.J.,National Disaster Management Institute NDMI
WIT Transactions on the Built Environment | Year: 2013

The aim of this article is to extract the factors for successful conflict resolution by analyzing the multi-stakeholders' conflict framing and the course of conflicts in the context of dam construction as one of the measures of disaster mitigation. The author examined the stakeholders, perceptual framing and conflict resolution mechanism of the conflict in the process of constructing Hantan River dam of South Korea. The results suggest that the personnel in charge 1) establish joint fact-finding procedures, 2) expand citizen participation in policy making by sharing information, 3) coordinate inter-agency, 4) enact related Acts to develop long-term measures for the residents and 5) create a standard manual of conflict in the context of disaster for a successful completion of the relevant projects in the future. © 2013 WIT Press.

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