• The Korea Swine Journal
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• v.20 no.4 s.224
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• pp.156-158
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• 1998

• The Korea Swine Journal
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• v.23 no.3 s.259
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• pp.178-181
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• 2001

• 해운
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• no.8 s.30
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• pp.40-40
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• 2006

• Journal of the Korean Institute of Gas
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• v.16 no.5
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• pp.1-6
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• 2012

It becomes a more and more common practice to build facilities bigger and more integrated in an effort to optimize the process within limited resources and spaces. As the capacity of facilities increases, so does the flow rate and pressure. This in turn leads to a high consequence of accident. Not only are these facilities vulnerable to leakage because of their high pressure, but also subsequent fire and explosion can be threatening. For these reasons, there is an urgent need to come up with solutions to assess and minimize the damage from an accident. The Quantitative Risk Assessment(QRA) is one of the most efficient ways to solve problems on pressurized pipelines. The QRA can be re-enforced by applying reduction factors. In this study various types of accidents in a pressurized pipeline were evaluated. The damage from accidents were computed, then. Finally the reduction factors were very effective to decrease consequences of high pressure pipeline accidents.

• Korean Journal of Social Welfare Studies
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• v.45 no.2
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• pp.5-30
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• 2014

This study sought to identify developmental trajectories of bullying victimization from late elementary school through early high school, and to examine internalizing and externalizing problem outcomes associated with the trajectory group membership. Data from Seoul Panel Study of Children were collected annually over a 7-year period from 5th grade of elementary school through 2nd grade of high school (2005~2011). Latent class growth analysis yield three trajectory classes corresponding to stable low (81.2%), stable high (3.5%), and declining bullying victimization (15.6%). Findings from analysis of covariance indicated that students in both stable high and declining trajectory groups reported significantly higher means in internalizing behavior (withdrawal, depression/anxiety, and suicide ideation), compared to those in the stable low group. For externalizing behavior such as aggression and juvenile status offense, students in the stable high group showed higher means, compared to those in the stable low and declining trajectory groups. Developmental pattern of bullying victimization over multiple development stages and associated internalizing and externalizing outcomes are discussed as are the implications for the bullying prevention.

• Proceedings of KOSOMES biannual meeting
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• 2008.05a
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• pp.115-116
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• 2008

A big accident of oil spill occasionally occur in coast of Korea according to increase of sailing of oil tank ship in recently. This study was focused on transformation and behavior of spilled oil in ocean and effect of spilled oil on environment and introduce the methods of analysis of spilled oil, compensation for the damage caused by spilled oil.

• Korean Journal of Environmental Agriculture
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• v.16 no.1
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• pp.14-18
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• 1997

The objective of this research was to increase phytoprotective effects by combined treatment of uniconazole and free radical scavengers such as ascorbic acid or sodium benzoate on $SO_2$ injury in P. occidentalis. The plant injury, chlorophyll content and enzyme activity of superoxide dismutase(SOD) and peroxidase(POD) affected by combined treatment were also investigated. The phytoprotective role of uniconazole was nullified by spray of Diethyldithiocarbamate(DDTC) resulting in the decrease of SOD and POD activities. Free radical scavengers, sodium benzoate and ascorbic acid, did not affect SOD and POD activity, but significantly inhibited the development of visible injury, degradation of chlorophyll, and SOD and POD activity in leaves exposed to $SO_2$. The spray of ascorbic acid decreased plant susceptibility to $SO_2$ induced by DDTC application. These results indicate that uniconazole application increase SOD activity that play a role of antioxidant in plant body, but sodium benzoate and ascorbic acid do not affect enzyme activities of SOD or POD.

• Journal of the Korea Society for Simulation
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• v.26 no.3
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• pp.1-11
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• 2017

Blast injuries in a compartment are investigated, and the effects of obstacles on blast injury are particularly analyzed by comparing injuries in the compartments with or without protruding obstacles inside. Even if blast pressure profile tends to be complicated in a confined space unlike in open field, it can be obtained in a relatively short time by using some empirical fast running models for simple confined spaces. However, a finite element method should be employed to obtain blast pressure profiles in a case with obstacles in confined spaces, because the obstacles heavily disturb blast waves. On the other hand, Axelsson SDOF(Single degree of freedom) model and ASII(Adjusted severity of injury index) injury level are employed to estimate blast injury in compartments, because the usual pressure-impulse injury criterion based on the ideal Friedlander waves in open the field cannot be applied to personnel in a confined space due to complexity of blast waves inside. In cases with obstacles, chest wall velocity was reduced by 26 to 76 percent(%) and the personnel injury in the compartment caused by blast was also reduced.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2016.11a
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• pp.236-237
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• 2016

인류의 발전과 함께 재난관리에 대한 발전도 이루어져 왔다. 그러나 세계은행(World Bank)의 조사에 의하면 지난 30년간 전 세계적으로 자연재해로 인해 250만 명의 사람이 목숨을 잃었고, 피해금액은 4조 달러에 이르는 것으로 나타나, 아직 재난관리 체계에 많은 문제점이 있음이 드러났다. 특히, 우리나라는 각종 재난으로 인해 최근 10년(2006~2015)간 연 평균 약 5천억원의 피해액과, 약 1조 1천억원의 복구비를 지출하고 있다(국민안전처, 2016). 만약 재난 피해 발생 전 피해규모와 영향을 신속하게 추정할 수 있다면, 예방 및 대비 차원의 재난관리를 통해 피해액이 크게 감소될 것이다. 따라서 본 연구에서는 국내 재해의 65% 이상을 차지하고 있는 호우피해를 대상으로, 피해 예측함수를 개발하였다. 한강 권역을 본 연구의 대상지역으로 선정하였고, 재해연보자료를 조사하여 대상지역의 호우피해 발생 현황 및 피해액을 분석하였다. 또한 대상지역의 강우자료를 확보하기 위해 종관기상관측소의 강우자료를 확보하였다. 강우자료를 이용하여 지속시간별(1~24시간) 최대강우 자료와 재해기간별 선행강우(1~5일) 자료, 그리고 재해기간의 총 강우량 자료를 산출하였다. 이를 독립변수로 하여 재해기간의 시설물별 피해액과의 분석을 통해 호우피해 예측함수를 개발하였다. 호우피해 예측함수는 피해액을 로지스틱회귀분석을 통해 호우피해액이 큰 범위와 호우피해액이 작은 범위로 분류한 혼합분포를 이용하여 개발하였다. 본 연구는 효과적인 재해 관리체계를 확립 하고, 재해예방 및 대비 단계의 기초 자료로 사용될 수 있을 것으로 기대된다.

• Korean Journal of Environmental Agriculture
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• v.11 no.1
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• pp.41-49
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• 1992

To determine the efficacy of uniconzaole[(E)-1-(4-chlorophenyl)-4,4-dimethy 2-(1,2,4-triazol-1-yl)-1-penten-3-ol)](XE-1019) as a phytoprotectant against $O_3$ injury in tomato plants(Lycopersicon esculentum Mill. 'Pink Glory'), plants were given a 50ml soil drench of uniconazole solution at concentrations of 0.001, 0,01, 0.1 and 0.2mg/pot thirteen days prior to $O_3$ fumigation. All four uniconazole concentrations were effective in providing protection against $O_3$ exposure(16h at 0.3 ppm). Uniconazole treatment above 0.001 mg/pot significantly reduced stem elongation, leaf enlargement, leaf area and fresh weight of plant, whereas increased chlorophyll concentration. Transpiration rate on a whole plant basis was reduced by uniconazole treatment and $O_3$ exposure. Uniconazole reduced ethylene production induced by $O_3$ injury but had little or no effect on defoliation of cotyledons and leaf epinasty. Activities of peroxidase (POD) and superoxide dismutase(SOD) were slightly increased by application of uniconazole. With increasing exposure time, $O_3$ increased POD activity but decreased SOD activity. The phytoprotective effects of uniconazole were diminished by applying gibberellin at $10{\sim}20$ ppm. These results suggest that the phytoprotective effects of uniconazole are related to its role of increasing activities of free radical scavengers such as POD and SOD, in addition to growth-retardation as an anti-gibberellin.