• Journal of the Korean Society of Marine Environment & Safety
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• v.9 no.1
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• pp.57-63
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• 2003

Marine traffic system is composed of ship, ship's operators and traffic environment The navigation channel is a part of traffic environment and the design of channel is a crucial factor for safe navigation This paper aims to evaluate ship-handling difficulty in straight and bend channels with an Environmental Stress model(ES-model). The ES-model is used to evaluate ship handling difficulty quantitatively on the basis of the ship operator's subjective judgement for safety in navigation The calculation of ES value was made on the basis of three factors such as channel width, ship's length and speed in straight and channels for safe navigation. The interrelation between factors was analyzed and reasonable design standards of channel width, ship's length and speed were proposed for safe navigation of ship in bend channel.

• Journal of the Society of Disaster Information
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• v.16 no.3
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• pp.594-601
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• 2020

Purpose: The purpose of the present study was to identify factors affecting anxiety about disaster damage potential in Gyonggi-do and evacuation behavior that influences evacuation behavior. Method: Multiple regression analysis was performed to test the hypothesis and to analyze the influence of anxiety about disaster damage potential and perceived stress, and analyzed similarity in correspondence between age and anxiety about disaster damage potential. Results: The anxiety about disaster damage potential of a group vulnerable to safety and anxiety about disaster damage potential of disaster system collapse were perceived in close proximity. Disaster system collapse, evacuation life, and natural disasters were found to be factors affecting perceived stress. Stress and natural disasters were found to be influencing factors on evacuation behavior. Conclusion: The necessity of managing stress was confirmed since anxiety about natural disaster damage potential and stress affect evacuation behavior. The recent experiences of heavy rain disasters indicate that the anxiety about disaster damage potential is expected to increase. The findings also indicate the importance of preventive planning and psychological management to manage the anxiety about disaster damage potential.

• Proceedings of the Korea Concrete Institute Conference
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• 2009.05a
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• pp.41-42
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• 2009

The purpose of this paper is to inspect a structural performance for the composite wall pile through static bending test. In result, all specimen came to failure in 1.8 times cracking load and the drift of the neutral axis on a load increasing occurred.

• The Safety technology
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• no.110
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• pp.72-73
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• 2007

최근 어느 방송에서 방영되고 있는 개그프로그램에서 일명 대머리 분장을 하고 나와 우스꽝스러운 행동을 하는 것이 커다란 인기를 끌고 있다. 우리는 쉽게 주위에서 머리칼이 빠진 사람을 볼 수 있는데, 예전에는 그냥 나이가 들면 그럴 수 있다고 생각했던 탈모가 이제 젊은 사람 또는 여성들에게까지 나타나 심각한 문제가 되고 있다. 그나마 탈모 전에 배필을 만나 짝이 있는 사람은 다행이지만, 탈모로 좋아하는사람과 이루어질 수 없다는 것은 참으로 안타까운 일이다. 최근 여성을 대상으로 한 설문조사에서 '대머리 총각'이 결혼 기피 1순위로 조사되었다.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2002.11a
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• pp.235-238
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• 2002

작업관련성 근골격계질환(work-related musculoskeletal disorders)은 힘, 작업자세, 진동, 심리적 스트레스, 개인차 등 여러 가지의 신체적 작업 부하 요인에 의해 발생하는 것으로 알려져 있다. 이러한 요인 중 부적절한 작업자세가 근골격계질환의 주요한 발생요인으로 알려져 있는데, 2000년도 우리나라에서 업무상질병자로 인정된 작업관련성 근골격계질환자 중 부적절한 작업자세로 인한 질환자가 89%, 반복작업 63.7%, 무리한 힘 53%, 진동 6.6%, 신체접촉에 의한 질환자가 1.1%로 조사되었다. 특히 부적절한 작업자세 중 비트는 자세로 인한 질환자가 87.2%로 가장 많았으며, 신체부위별로도 허리부위 질환자 중 부적절한 작업자세로 인한 질환자가 83.6%로 가장 높은 것으로 나타났다.(중략)

• Korean Journal of Social Welfare Studies
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• v.47 no.3
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• pp.113-138
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• 2016

This study aims to examine whether the relationship between client violence and turnover intentions is mediated by job stress among community mental health social workers. Data of a sample of 1,429 drawn from a study of nation-wide mental health promotion centers in 2013 was analyzed in order to verify both the direct and mediating effects between client violence, turnover intentions, and job stress. The study found that 67.2%(n=961) of the sample experienced client violences in the workplace. Furthermore, the experience of client violences had a direct effect on turnover intentions and job stress had a partially mediating effect on the relationship between client violence and turnover intentions. Based on the results, implications were discussed to reduce the extent of job stress of mental health social workers and to provide a safer work environment.

• Journal of the Society of Disaster Information
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• v.14 no.1
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• pp.72-78
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• 2018

This study was conducted on workers in high risk groups. And the effects of improper equipment wear on the recognition of safety accidents and job exhaustion. In addition, the mediating effect of the recognition of safety accident risk was identified. The results of the analysis are as follows. Because high-risk workers wear inappropriate equipment, emotions are depleted and personalization problems arise. And the mediating effect of the recognition of safety accident risk. Therefore, there is a need to provide generous support to ensure that high-risk workers are able to work properly in hazardous workplaces, so that they can wear appropriate equipment to defend the risks.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2006.05a
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• pp.131-136
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• 2006

전조등의 밝기 변동에 대한 운전자의 시인성 및 뇌파측정, 심리평가를 행하고 이를 바탕으로 전조등 밝기변화의 한계값과 운전자의 안전성을 고려한 평가 알고리즘을 개발하였다. 전조등의 밝기 변화 한계치는 심리평가의 설문지 작성을 통한 주관적 평가를 바탕으로 밝기 변화, 눈 깜박임, 불쾌감 등에 대한 한계값을 제시하였다. 그리고 뇌파측정을 바탕으로 정신적, 시각적 스트레스에 대한 한계값을 제시하였으며, 운전자의 시인성 측정을 바탕으로 차량을 장애물의 위협 없이 안전하게 정지하기 위한 한계값을 제시하였다. 안전성 평가 알고리즘은 장애물을 인식하고 브레이크 페달을 밟기 시작하기 까지 최대한 허용할 수 있는 시간인, 여유 시간 이내에 전압변동을 완료하고 최초의 정상 전압으로 복귀하는 경우와 그렇지 않은 경우를 적용할 수 있는 2종류의 알고리즘을 개발하였다.

• Journal of Korea Water Resources Association
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• v.54 no.10
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• pp.779-793
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• 2021

Water stress and environmental drivers are important factors to explain the variance of gross primary production (GPP). Environmental drivers are used to generate GPP in Moderate Resolution Imaging Spectroradiometer (MODIS) algorithm and process-based model. However, MODIS algorithm only consider the vapor pressure deficit (VPD) data while the process-based biogeochemical model also uses limited data to express water stress. We compared the relationship between environmental drivers and GPP from eddy covariance method, MODIS algorithm, and Community Land Model 4 (CLM 4) simulation in normal years and drought years. To consider water stress specifically, we used VPD and evaporative fraction (EF). We evaluated the effects from environmental drivers and EF towards GPP products using the structural equation modeling (SEM) in South Korea. We found that GPP products from MODIS algorithm and model simulation results were not restricted from VPD data if VPD was underestimated. We also found that in the cropland area, irrigation effects can relieve VPD effects to GPP. However, GPP products derived from MODIS and CLM 4 had limitation to explain the irrigation effects to GPP. Overall, these results will enhance the understanding of GPP products derived from MODIS and CLM 4.

• Journal of Food Hygiene and Safety
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• v.28 no.2
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• pp.146-151
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• 2013

Perilla frutescens usually dieted in East Asian country such as Korea and Japan. Antioxidant, antiinflammatory and anticancer activities of perilla leaves have been founded. In previous study, we confirmed that caffeic acid, major compound of perilla, was accumulation by sucrose aqueous solution and thus antioxidant effect of perilla was enhanced. In this study, we investigated the protective effect of functional perilla leaves extract (PLE) against tert-butyl hydroperoxide(t-BHP) induced-oxidative hepatotoxicity. The pretreatment with PLE (250, 500 and 1000 mg/kg b.w.) for 5 days before a single dose of t-BHP (i.p.; 0.5 mmol/kg) significantly lowered the serum levels of aspartate aminotransferase, alanine aminotransferase and lactate dehydrogenase dose-dependently. And we confirmed that the indicators of oxidative stress were remarkably reduced in the liver, such as the glutathione contents and malondialdehyde, marker of lipid peroxidation. Pathological histology of the rat livers tissues showed that PLE reduced the hepatocyte degeneration and neutrophilic infiltration of liver induced by t-BHP. These results suggest that functional perilla frutescens has the protective effect of liver against t-BHP-induced oxidative hepatic stress in rats.