• Safety and Health at Work
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• 제8권2호
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• pp.206-211
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• 2017

Background: Self-reported low back pain (LBP) has been evaluated in relation to material handling lifting tasks, but little research has focused on relating quantifiable stressors to LBP at the individual level. The National Institute for Occupational Safety and Health (NIOSH) Composite Lifting Index (CLI) has been used to quantify stressors for lifting tasks. A chemical exposure can be readily used as an exposure metric or stressor for chemical risk assessment (RA). Defining and quantifying lifting nonchemical stressors and related adverse responses is more difficult. Stressor-response models appropriate for CLI and LBP associations do not easily fit in common chemical RA modeling techniques (e.g., Benchmark Dose methods), so different approaches were tried. Methods: This work used prospective data from 138 manufacturing workers to consider the linkage of the occupational stressor of material lifting to LBP. The final model used a Bayesian random threshold approach to estimate the probability of an increase in LBP as a threshold step function. Results: Using maximal and mean CLI values, a significant increase in the probability of LBP for values above 1.5 was found. Conclusion: A risk of LBP associated with CLI values > 1.5 existed in this worker population. The relevance for other populations requires further study.

• Computers and Concrete
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• 제19권4호
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• pp.339-346
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• 2017

The main objective of this paper was to illuminate the effect of marine environmental condition on durability of reinforced concrete (RC)-corroded columns strengthened with carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) layers. Small-scale columns were prepared and corroded by an accelerated corrosion process. After strengthening, compressive strength tests were carried out on control and weathered specimens. In this research, a marine simulator was designed and constructed similar to the tidal zone of marine environment in south of Iran which was selected as a case study in this research. Mechanical properties of wrapped specimens were studied after placing them inside the simulator for 3000 hours. Marine environment decreased ultimate strength by 4.5% and 26.3% in CFRP and GFRP-wrapped columns, respectively. In some corroded-columns, strengthening was carried out after replacing damaged cover by self-compacted mortar. In this method, by confining with one layer of CFRP and GFRP, 4.2% and 22.4% reduction in ultimate strength was observed, respectively, after exposure. Furthermore, the elastic-brittle behavior has been verified in this retrofit method. Also results of tension tests revealed, the ultimate tensile strength was degraded by 2% and 28.8% in CFRP and GFRP sheets, respectively, after applying marine exposure.

• 한국치위생학회지
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• 제14권4호
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• pp.527-537
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• 2014

Objectives : The purpose of this study was to investigate the influence of the awareness towards dental radiation exposure and concern in the adults. Methods : A self-reported questionnaires was filled out by 470 adults over 19 years old in Seoul from May 16 to July 10, 2013. Results : Fear for dental radiography showed that those who positively thought of radiography had 2.86 folds necessity of radiography than those who did not. Positive responders worried about the hazards of dental radiation 4.64 folds than the negative responders. More worried responders had felt the radiation hazards 1.83 folds than those who worried less. The worried responders also had higher awareness of dental radiation hazards. Conclusions : Frequent use of dental radiography is able to be prevented by protective devices. So it is important to prevent the possible hazards of the dental radiography by personal protective education.

• 대한안전경영과학회지
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• 제14권4호
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• pp.137-145
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• 2012

This study was planned to analyze the effect of the types of employment on work-related injury experience. The types of employment may have influenced on working conditions including the exposure to risk factors. Korean Working Conditions Survey have collected the various working conditions as household survey with structured questionnaire. The probability of work-related injury of self-employed is more than that of regular worker. But there is no difference of probability of work-related injury experience between regular and irregular worker controlled by general characteristics and the exposure to risk factors. Authors have found that the type of employment have indirect effect on work-related injury experience via the exposure to risk factors. The result of this study may be heuristic one because of data limitation as cross sectional survey data. In future, well designed survey data can evaluate the effect of the type of employment on safety and health status.

• 한국콘텐츠학회논문지
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• 제16권9호
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• pp.638-648
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• 2016

본 연구는 개인의 자존감과 메시지가 제시하는 보상 유형의 상호작용이 국제구호 캠페인의 효과에 미치는 영향에 대해 조사하였다. 자존감은 스스로 얼마나 가치 있는 존재로 느끼는지를 나타내고, 보상은 긍정적 대가를 의미하며 내적/외적 보상으로 구분하였다. 실험은 184명을 대상으로 실행되었으며, 2단계로 나누어서 실행되었다. 1단계에서는 참여자들의 개인 성향과 경험에 관한 설문을 진행하였고, 2단계에서는 유형별 메시지를 제시한 후 나타나는 반응을 평가하였다. 연구 결과, 캠페인 태도에서 자존감 수준이 높은 사람들은 외적 보상보다 내적 보상 정보를 접했을 때 더 호의적인 캠페인 태도를 보여주었고, 자존감이 낮은 사람들은 차별적 반응을 보여주지 않는 것으로 나타났다. 행위 의도에서는 유의미한 결과가 도출되지 않았다.

• 한국항해항만학회지
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• 제31권2호
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• pp.127-132
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• 2007

The primary purpose of this study is to examine empirically the effect of the organizational characteristics in the vessel with foreign crews on their self-efficacy and organization commitment. Currently, the restrictions on the employment of the foreign crews are being eased in the Korean shipping industry and many problems are occurring consequently. However, specific and empirical studies on the relevancy of organizational characteristics to the crew's self-efficacy and organizational commitment on board the vessels with combined crews have not yet been carried out. To solve these problems, we examined how the organizational characteristics such as communication and leadership trust of different language and culture related to vessels with combined crews influence on the self-efficacy, job satisfaction and organizational commitment of the foreign crews through SEM analysis. According to the results, hypothesis 1, 2 and 3 were all supported with statistical significance. That means that communication and leadership trust of the vessel with foreign crew had positive effects on their self-efficacy and that such self-efficacy also had a positive effect on the organizational commitment and job satisfaction. To conclude, this study suggests that foreign crew's self-efficacy should be firstly enhanced in order to improve organizational commitment on the vessel with combined crews. Furthermore, studies on self-efficacy of foreign crew's organization are urgently needed to enhance the effectiveness of an organization in a vessel with combined crews that has special environment - working environment with depression and uneasiness due to the exposure to the different language and culture, and excessive stress from the social and psychological adaptation. Therefore, an attempt of this study is considered to be timely since there has not been a study on this subject so far and result of this study will contribute a lot to the organization management of a vessel with combined crews.

• 한국콘텐츠학회논문지
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• 제18권8호
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• pp.646-657
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• 2018

본 연구는 간호대학생의 우울에 미치는 영향요인을 규명하고자 시행된 서술적 상관관계연구이다. 연구대상자는 B시, D시, G도 소재 3개 대학에 재학중인 간호학과 3, 4학년 216명이었다, 자료수집 기간은 2018년 4월 15일부터 5월 20일까지이었다. 자료분석방법은 IBM SPSS Statistics 24.0 프로그램을 이용하여 서술통계, t-검정, ANOVA, Pearson's 상관계수 및 위계적 회귀분석을 하였다. 대상자의 언어적폭력과 우울정도는 유의한 양의 상관관계(r=.261, p<.001), 신체적위협과 우울 정도는 유의한 양의 상관관계(r=.291, p<.001)를 보였다. 또한, 대상자의 자아존중감은 회복탄력성과 유의한 양의 상관관계(r=.685, p<.001), 우울과 유의한 음의 상관관계(r=-.590, p<.001)를 보였다. 대상자의 회복탄력성은 우울과 유의한 음의 상관관계(r=-.612, p<.001)를 보였다. 대상자의 우울에 가장 큰 영향을 미치는 요인은 회복탄력성(${\beta}=-.337$, p<.001)이었고, 다음으로 자아존중감(${\beta}=-.279$, p<.001), 신체적위협(${\beta}=.177$, p=.004)순이었으며, 총 설명력은 51.5%(F=17.965, p<.001)였다. 본 연구 결과 간호대학생의 임상실습 폭력피해 경험 중 신체적위협과 자아존중감, 회복탄력성이 우울에 유의한 영향요인임이 규명되었다. 따라서, 본 연구에 기초하여 간호대학생의 우울을 감소시키기 위해서 자아존중감을 높이고 회복탄력성을 증진시키는 중재프로그램의 개발 및 임상실습 중 폭력 예방 프로그램이 필요함을 시사한다.

• 농촌의학ㆍ지역보건
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• 제48권3호
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• pp.178-188
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• 2023

본 연구는 2014년부터 2019년까지 충남농업안전보건센터에서 실시한 "농약 노출 및 중독 질환 조사" 자료를 이용하여 농업인의 주관적 건강상태 관련요인을 찾고자 하였다. 연구 결과 남성, 비닐하우스 재배, 농약 노출 후 증상이 있는 경우에서 주관적 건강상태를 나쁘다 생각하는 경우가 많았다. 반면, 연간 수입이 5,000만원 이상일 경우, 교육 이상, 꾸준한 운동을 하는 경우에서 주관적 건강상태를 좋다고 생각하는 경우가 많았다. 본 연구의 결과를 농업인의 구체적인 건강관리 기술 습득을 통한 건강관리프로그램 개발의 기초자료로 제공할 수 있다는 것에 의의가 있다.

• 한국초전도ㆍ저온공학회논문지
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• 제5권1호
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• pp.17-20
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• 2003

Josephson junctions were fabricated for several oxidation conditions and several junction sizes. Considering self-field effect suppressing the observed critical current (Ic) at large junctions, the observed Ic values were in good agreement with theoretical prediction. The predicted junction critical current for small junction limit was also confirmed by experiment. The dependence of the estimated Jc as a function of oxidation exposure showed that our junctions have lower Jc than other authors' at the same oxidation exposure. This is thought to be one of equipment-specific phenomena. Details of experimentals will be reported with brief discussion.

• The Journal of the Acoustical Society of Korea
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• 제15권4E호
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• pp.58-64
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• 1996

The aims of this study were to investigate the covariation between the extent of activity disturbances and general annoyance, and to study the relation between the extent of annoyance reactions and noise sensitivity. This paper presents a description of a model developed by taking into account self-rated noise sensitivity and noise rating(i,e., annoyance) for road traffic. The results indicate that there are large variations in noise sensitivity which is independent on the level of noise. It is also found that the extent of all activity disturbances decreased with decreased general annoyance. The paper suggests a normative approach to predicting individual's reaction to noise exposure, based on a periodically observed relationship between the prevalence of activity disturbance and annoyance. The model also predicts a road traffic-noise adaptatin level for each individual.