• Journal of Korean Society for Geospatial Information Science
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• v.20 no.2
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• pp.109-117
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• 2012

Recently, large-scale multi-hazards have been occurred in the various areas of the world. A variety of Earth observation sensors such as satellite EO, aerial and terrestrial LiDAR have been utilized for global natural disaster monitoring. Especially, commercial satellites which observe the Earth regularly and repeatedly, and acquire images with cm-level high spatial resolution enable its applications to extend in the fields of disaster management from advanced disaster monitoring to timely recovery. However, due to existing satellite operation systems with some limitations in almost real-time and wide regional disaster response, close international collaborations between satellite operating organizations like NASA, JAXA, KARI etc. have been required for collecting satellite images in time through a satellite platform with multi-sensors or satellite constellation. For responding domestic natural disaster such as heavy snowfall and extreme rainfall in 2011, this paper proposes a disaster management system for timely decision-making; rapid acquisition of satellite imagery, data processing, GIS analysis, and digital mapping through cooperation with NDMI in Korea and International Charter-Space and Major disasters.

• The Journal of the Korea Contents Association
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• v.10 no.1
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• pp.343-352
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• 2010

As a result of comparing and analyzing the related legislation of each nation, more superior legislative systems should be made to cope with a number of terrors effectively. And also it is required to devise some concrete regulations such as the following in superior legislative systems. First, because it is hard to collect information on terrorism and watch over suspects according to Communication Privacy Protection Law. More in-depth discussion into the issue of surveillance is needed for the protection of lives and property, although public concerns of privacy are a valid point of contention. Second, it is necessary to take complementary measures on immigration as surveillance, since the current Immigration Control Law has restrictions in many ways to hinder efforts to root out terrorists. Third, under the current law on financial activities, it is impossible to block influx of terror financing. Therefore it is necessary to come up with ways of making the punishment procedures. Fourth, considering that convicted terrorists get punished under the standard procedures and precedents, it is required to clearly differentiate between what the terror acts are and what terrorist groups are. Fifth, it is necessary to make use of the private security system to enhance the security system of national facilities.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.34-36
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• 2021

미래 해상환경에 대응하기 위해 기존 항로표지의 기술 및 역할에 ICT 기술을 융합하여 스마트한 해양 서비스 제공을 위한 노력이 계속되고 있다. 본 논문에서는 현 항로표지 통신 시스템의 문제점을 분석하고 스마트 항로표지 시설 고도화를 위한 최적의 통신 시스템 및 다중 통신 플랫폼 개발 방향을 제시하도록 한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.1
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• pp.61-72
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• 2017

Due to the climate change, damages of human life and property caused by natural disaster have recently been increasing consistently. In South Korea, total damage by natural disasters over 20 years from 1994 to 2013 is about 1.0 million dollars. The 13% of total damage caused by heavy snow. This is smaller amount than the damage by heavy rainfall or typhoon, but still could cause severe damage in the society. In this study, the snow damage in Gangwon region was estimated using climate variables (daily maximum snow depth, relative humidity, minimum temperature) and scoio-economic variables (Farm population density, GRDP). Multiple regression analysis with enter method was applied to estimate snow damage. As the results, adjusted R-square is above 0.7 in some sub-regions and shows the good applicability although the extreme values are not predicted well. The developed model might be applied for the prompt disaster response.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2009.06a
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• pp.368-371
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• 2009

The GALILEO Project is to be the one and only European Global Navigation Satellite System(GNSS). The GIVE-B satellite, a second experimental GALILEO satellite was launched and started the transmission of ranging signals. GIOVE-B satellite is intended as a trueprototype of future GALILEO satellite. So I introduce the standard deviation of code multi path, signal power, antennas performance and L1-E5 group delay etc. Therefore I comprehend the current progress and tend of GALILEO Project and try to propose the national countremeasures.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.1023-1026
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• 2014

CCTV 는 범죄상황 발생시 보안과 증거확보를 위해 사용되어 왔다. 실제 상황에서 범죄가 발생하기 전 예방을 하는 것 보다 사후 처리에 용도를 두고 있으며, 범죄 상황에서의 보행자에 대한 행동을 미리 예측하기 어렵다. 본 논문에서는 노상에서 CCTV 로 수집된 데이터를 통해 객체 인식 및 객체간의 관계를 파악한다. 파악된 객체를 다중의 CCTV 연동 카메라가 추적하고 객체의 행동을 분석한다. 객체가 이상행동이라고 판단될 시 위협을 받는 객체 및 가까운 기관에 알림을 줄 수 있는 모델을 제안한다. 이를 통해 범죄 발생 전 즉각적인 대응이 가능하며 빠른 상황판단이 가능하다.

• KIPS Transactions on Computer and Communication Systems
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• v.4 no.6
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• pp.205-212
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• 2015

SSH provides a secure, encrypted communication channel between two end point systems using public key encryption. But SSH brute force attack is one of the most significant attacks. This kind of attack aims to login to the SSH server by continually guessing a large number of user account and password combinations. In this paper, we analyze logs of SSH brute force attacks in 2014 and propose a failed-log based detection mechanism in high performance computing service environment.

• Journal of the Korean Chemical Society
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• v.54 no.1
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• pp.150-157
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• 2010

In this study, we investigated the differences of mapping understanding and the types of mapping errors by the levels of students' cognitive/affective variables and the relationships between mapping understanding and these variables in learning 'concentration and reaction rate' with analogy. After administering the tests regarding logical thinking ability, visual imagery ability, analogical reasoning ability, self efficacy, and need for cognition as pretests, students learned with analogy. Then, students' familiarity and mapping understanding were examined. Analyses of the results revealed that the scores of the mapping understanding for the students with higher levels of all cognitive/affective variables except visual imagery ability and familiarity were significantly higher than those for the students with lower levels. The differences in the types of the mapping errors such as overmapping, failure to map, impossible mapping, artificial mapping, mismapping, rash mapping, and retention of a base feature were also found by the levels of students' cognitive and affective variables. The scores of students' mapping understanding were positively correlated with those of all cognitive and affective variables. The results of multiple regression analysis indicated that students' science achievement, logical thinking ability, and familiarity were significant predictors of mapping understanding. Educational implications of these findings are discussed.

• Journal of the Society of Disaster Information
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• v.16 no.1
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• pp.70-78
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• 2020

Purpose: When a disaster occurs, information is collected and sent indiscriminately to the disaster safety situation room, making it difficult to make quick and correct decisions. Therefore, in this study, both the field response team and the situation room attempted to derive the essential information elements for disaster management so that they can identify and respond optimally. Method: In this study, the actual disaster response process was first identified based on the case of large-scale fire disasters in multi-dense facilities. Afterwards, essential information on disaster management was obtained by analyzing the standard manual for large-scale fire crisis management in multi-dense facilities and the fire situation report form prepared at the time of disaster. Result: The Essential information on disaster management was divided into four stages: situation reception·reporting·transmission, total response·regional emergency rescue control group·regional disaster safety task force, operation stage of central emergency rescue control group·central disaster safety task force, and recovery stage. Since then, the information to be collected at each stage and the information relevant to core tasks are presented. Conclusion: The Essential information on disaster management thus obtained can serve as a guide for the person who collects information on site to collect information efficiently. In addition, it is expected that the situation room in charge of disaster response decision-making will receive only the information necessary for decision making, so that it is possible to make a quick situation decision and more efficient disaster situation management.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.11
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• pp.326-333
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• 2020

This study focused on self-effects and spouse-effects that impact marital satisfaction in sex role stereotypes, work-family conflict and work-family enrichment. 95 double-income couples participated in this study, and the paired T-Test and multiple regression analysis were conducted. The result of the study showed that sex role stereotypes, work-family conflict, and work-family enrichment are not significant differences in husband and wife, but a husbands was significantly higher than wife in marital satisfaction. In the next step, we considered variables affecting marital satisfaction, and found a significant difference between husband and wife. Work-family enrichment positively affected the husband's marital satisfaction, while the wife's satisfaction was positively affected by the husband's sex role stereotype and negatively affected by her work-family conflict. This study suggests that marriage enrichment programs, the education of husband and wife, and couple counseling should consider individual effects and spouse effects.