• 해양환경안전학회지
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• 제15권3호
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• pp.217-222
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• 2009

선박을 운항하는 항해사의 피로도(Fatigue)는 안전항해와 매우 밀접한 관계를 가지고 있다. 또한, 당직항해사의 피로는 중대한 해양사고를 초래할 수 있다. 본 연구에서는 항해사의 근무환경, 피로유발요인 및 피로증세 등에 대하여 문헌조사를 실시하였다. 그리고 실습항해사를 대상으로 졸음, 정신적 육체적 작업부하도에 대한 피로도 관련 설문조사를 실시하고 그 결과를 분석하였다. 마지막으로 이와 같은 피로도 조사 및 설문조사 분석결과를 바탕으로 항해사의 피로도 분석항목을 선정하고 이를 기반으로 향후 항해사의 업무수행능력을 평가하기 위한 피로도 분석모델을 제안하였다.

• 항공우주의학회지
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• 제31권2호
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• pp.38-44
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• 2021

Purpose: This study aimed to identify the prevalence of fatigue and its associated factors leading to the fatigue among Korean commercial airline pilots. Methods: An anonymous, web-based questionnaire collecting data on sleep related characteristics was completed by airline pilots. The final 1,029 samples of completed questionnaires were analyzed. The association of the risk factors with fatigue was determined using logistic regression analysis. Results: The prevalence of fatigue was 60% (Fatigue Severity Scale index≥3.2), disturbed sleep 28% (Pittsburgh Sleep Quality Index≥9), daytime sleepiness 17% (Epworth Sleepiness Scale≥10), and sleep apnea (Berlin Questionnaire≥2) 11%. The fully adjusted logistic regression showed that quality of life (odds ratio [OR]=0.16, confidence interval [CI]=0.11-0.24), daytime sleepiness (OR=1.26, CI=1.18-1.34), sleep quality (OR=1.44, CI=1.29-1.61), mental workload (OR=1.10, CI=1.05-1.14), vigorous physical activity (OR=0.82, CI=0.72-0.92), late starts (OR=1.25, CI=1.06-1.46) and average weekly flying hours (OR=1.02, CI=1.00-1.03) were associated with higher levels of fatigue. Conclusion: Lower quality of life, disturbed sleep, more subjective sleepiness, shorter sleep duration, higher mental workload, less vigorous physical activity, frequent late starts, and longer flying hour were shown to be risk factors for fatigue in airline pilots. These findings should be taken into account in the development of sleep and fatigue countermeasures for airline pilots.

• 산업경영시스템학회지
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• 제32권1호
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• pp.26-33
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• 2009

The directions of the road are divided into two, the right-hand side and left-hand side of the road, by the convention and specific native method in the world. This paper deals with the characteristics and behaviors of drivers who are accustomed to driving on right-hand side of the road, drive with a handle on the left-hand side, and comparing with left-hand side drivers. The driver's eye movements were measured by eye camera and questionnaires were used for measuring subjective evaluation such as driving mental workload. The experimental results indicated even if the experts who had much experience on right-hand side driving, they had lower driving skill than novice driver, accustomed to driving on left-hand side. In terms of mental workload, MCH rating scale and MNASA-TLX, the right-hand side drivers were in lower stress condition than the left-hand side drivers because of having much driving experience. However, they conducted a few mistakes by confusing the position of turn signal and windshield wiper because of their driving habit or traits and it lead to operation mistakes. These results can be applied effectively to develop the driving support information with changed environments.

• 한국컴퓨터정보학회논문지
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• 제22권11호
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• pp.89-96
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• 2017

This study analyzed how mental health affects stress in adolescents. The subjects of the study were data of about 60,000 middle and high school students living in the country, using cross-tabulation data and chi - square test to analyze the relationship between stress and mental health of adolescents. As a result of the research, it was found that the adolescents exposed to the excessive stress showed a poor correlation with the recovery of the fatigue, while the adolescents with relatively low stress showed the good recovery of fatigue. In the case of mental illness, depression or despair, the students who answered that they were stressed showed a lot of experience. In the case of suicide ideation, suicide attempt, and suicide attempt, the number of attempts to commit suicide was high when the level of perceived stress was high similar to the result of previous analysis. This finding confirms that stress is an important factor in the quality of life in adolescent mental health. It can be used as a strategy and business to prevent the problem of youth suicide in modern society in advance by stress management.

• 한국안전학회지
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• 제28권3호
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• pp.100-106
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• 2013

According to the Statistics Korea, in 2011, people over the age of 65 years old accounted for 11.8% of Korea's population. This number is expected to rise to 15.0% by 2019, making Korea an "aged society". As age increases, physical ability degrades to the point that the workload must be adjusted limitations. However, workloads are given regardless of workers' ages or abilities. In addition, a decline in work efficiency due to aging also increases the risk of work-related injuries. Furthermore, the cases of stress related diseases along with musculoskeletal disorders(MSDs) rise as main factors of industrial disasters and excessive job stress gives negative influence not only on mental health but also on physical health so that job stress becomes a hot issue as a main cause of work ability falloff and turnover. The purpose of this research is to examine how the sociodemographic characteristics, MSDs symptoms and musculoskeletal workload of workers in the manufacturing industry of automobile parts influence work ability and job stress. As a result of the research, job ability showed significant differences statistically according to age, working year, sex, marital status and musculoskeletal workload and job stress showed significant differences statistically according to age, working year, marital status and musculoskeletal workload. In addition, it showed that as the worker's job ability decreases, job stress increases.

• 대한교통학회지
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• 제18권4호
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• pp.31-39
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• 2000

근래 폭발적인 휴대폰 사용자의 증가와 비례한 운전 중 휴대폰 사용에 의한 교통사고 빈도 및 상해정도의 증가는 운전 중 휴대폰 사용을 새로운 주요한 교통사고의 요인으로 떠오르게 하고 있다. 이는 휴대폰 사용에 의한 운전자의 조정 및 감시, 경계 행위의 방해, 인지 및 정신적 부하의 증가에 의한 '부적합한 경계 (improper lookout)'와 '부주의 (inattention)' 상태 발생에서 유발되며, 현재 많은 국가들이 법제정을 통한 운전 중 휴대 폰 사용금지를 실행중이거나 고려하고 있는 실정이다. 이에 본 연구는 현재 대부분의 국가에서 실질적 규제 대상에서 제외되어 있는 운전 중 핸드프리 휴대폰의 사용이 운전자의 부하 및 수행도에 미치는 영향을 시각분석 정신적 부하, 부가작업 수행도, 스티어링 엔트로피의 측정을 통하여 실시하였다. 실험은 일본 도시 중심부에서 실시되었으며, 결과는 부가작업의 형태에 따른 4가지의 실험상황과 시험구간의 직선부와 곡선부 (우회전) 사이의 비교분석 통하여 제시하였다. 또한, 실험설계, 적용평가방법, 및 실시과정에서의 문제점을 바탕으로 핸드폰관련 실제 도로시험을 위한 가이드라인을 제시한다.

• 대한인간공학회지
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• 제28권2호
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• pp.9-16
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• 2009

The aim of this study was to evaluate the effects of the driving performance and workload according to changing driving environment and types of steering wheel. Twelve drivers who participated in this study consisted of two groups; six Japanese as the left-lane drivers who was accustomed to driving on left-hand side of the road, and six Europeans, Americans, and Korean as the right-lane drivers who was accustomed to driving on right-hand side of the road. They were asked to operate a driving simulator while using two different types of steering wheel (for the left-hand side driving and the right-hand side driving). During the experiment, a range of data were measured including driving performance, mental workload, and eye movements which were recorded in order to identify the amount of time looking towards the in-vehicle route guidance. Results indicated that the use of the steering wheel by parallel moving led to increase high attentional demand and worse glance behavior to traffic signs for the left-lane drivers. In the case of the right-lane drivers, the effects by changing driving direction were more effective than the types of steering wheel due to their habit or traits.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1995년도 추계학술대회논문집
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• pp.18-26
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• 1995

To quantify a mental workload for office workers, nine element tasks were classified for office work. There were oral comprehension, written comprehension, oral expression, written expression, calculation, memorization, thinking, and classification materials. Among nine element tasks, oral comprehension, written comprehension, written expression, and thinking were selected and the degrees of conflicts between concurrently performed element tasks were measured and analyzed through the experiment. The measures were performance and subjective rating. The results were as follows. The written comprehension- written expression pair was showed the highest conflict value in terms of performance and subjective rating. The written comprehension-thinking pair was the lowest conflict value in terms of performance, while the oral comprehension-thinking pair was the lowest condlict value in terms of performance, while the oral comprehension- written expression pair was the lowest conflict value in terms of subjective rating. The findings are expected to be used for assessing workload for the office work.

• Safety and Health at Work
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• 제11권2호
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• pp.187-192
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• 2020

Background: This study investigated the relationship between verbal aggression against school teachers and upper extremity (neck, shoulder, upper limb, and/or upper back) musculoskeletal pain. Methods: This was a cross-sectional study of 525 elementary school teachers from Jaboatão dos Guararapes, Northeast Brazil. Results: The prevalence of upper extremity musculoskeletal pain among teachers who reported verbal aggression in the past six months (67.7%) was higher than that among those who did not report verbal aggression (51.7%): (prevalence ratio = 1.21; 95% confidence interval = 1.04-1.40). The prevalence of upper extremity musculoskeletal pain was associated with verbal aggression, sex, and common mental disorders, controlled by skin color, age, monthly income, teachers' education, years working as a teacher, workload, and obesity. Furthermore, the measure of the association between verbal aggression and upper extremity musculoskeletal pain was modified by sex and common mental disorders, considered altogether. Teachers who suffered verbal aggression, of the feminine sex, and also having common mental disorders reported high prevalence (85.4%) of upper extremity musculoskeletal pain. Conclusion: The association between verbal violence in the school and complaints of upper extremity musculoskeletal pain was strong and modified by teachers' sex and common mental disorders.

• 한국산학기술학회논문지
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• 제19권9호
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• pp.186-194
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• 2018

이 연구는 12주간 중학교 남학생의 방과 후 농구 훈련 프로그램 참여가 신체활동능력(심폐지구력, 유연성, 근력) 및 학습관련요인(인지강도, 인지속도, 집중력, 작업부하도)에 어떠한 영향을 주는지에 대하여 규명 하고자 총 20명의 참가자가 운동참여집단(10명)과 통제집단(10명)으로 나뉘었다. 본 연구의 통분석은 반복측정분산분석(Repeated Measure ANOVA)을 실시하고, 모든 자료의 유의수준은 ${\alpha}=.05$로 설정하였다. 분석한 결과 신체활동능력 변인 중 운동집단의 심폐지구력과 유연성은 통계적으로 유의하게 증가하였다. 그러나 운동집단의 악력은 통계적으로 유의하지는 않지만 증가하는 경향을 보였다. 학습관련요인 변인 중 운동집단의 인지강도, 인지속도, 집중력은 통계적으로 유의하지는 않으나 증가하는 경향을 보였고, 통제집단의 작업부하도는 통계적으로 유의하게 증가하였다. 이상의 결과를 종합해보면 방과 후 농구 훈련 프로그램의 참여는 중학생의 신체적인 성장과 발달과 학업성취도 측면에 긍정적인 영향을 줄 수 있을 것이라고 생각된다.