• 대한인간공학회지
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• 제25권2호
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• pp.77-84
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• 2006

The objective of this study was to investigate the validity of a self-administered checklist for office ergonomics. Total 71 office workers were asked to fill up the checklist, while 3 trained ergonomists assessed the work posture of the workers. It was shown that out of 10 checklist items, there were significant differences for 8 posture-related items between the worker group and the professional group. Therefore, when a checklist is applied to office environment, the posture-related aspect should be evaluated by ergonomic professionals.

• 대한인간공학회지
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• 제18권2호
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• pp.47-55
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• 1999

Recently, noise from personal cassette players (PCP) poses growing concerns together with occupational noise-induced hearing loss. Eighteen male and female volunteer subjects participated to determine preferred noise levels for PCP usage before, during, and after 2-hour subway riding according to sources (types) of PCP listening (language/news, soft music, and hard music). Audiometric tests were conducted before and after the 2-hour exposure of PCP noise under subway riding. Statistical analyses showed some significant hearing losses with the greatest loss of more than 6 dB at 4000 Hz for both ears, indicating that serious noise-induced hearing loss would potentially occurred due to prolonged use of PCPs. Practical safety countermeasures against PCP noise are further discussed.

• 대한인간공학회지
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• 제24권2호
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• pp.1-8
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• 2005

A new design of shoulder straps and frame of backpack is proposed for reducing compression and fatigue of shoulder. The stress reduction effects of a backpack equipped with the newly designed shoulder straps and frame have been analyzed statistically through various experiments. We show that the newly designed shoulder straps(wider than the conventional ones) is superior to existing shoulder straps in respect of RPE, task performance measure and physiological measure. The new frame is also proven to be superior to existing frame in respect of RPE and task performance measure. In conclusion, the proposed shoulder straps and frame are shown to enhance the task performance of soldiers.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1997년도 춘계학술대회논문집
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• pp.72-74
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• 1997

Integration and standardization of the related regulations and guidelines are necessary to evaluate a CFMS in a systematic manner. In this study, a hierachically categorized evaluation checklist was developed by collecting and structuring human factors issues listed in the various regulations, design requirements, and technical report. A PC-based database management system was developed to update and review the evaluation results. Standard interpretation examples, evaluation guidelines, and sample evaluation formats were also designed and integrated into the database system to reduce discrepancy in evaluation.

• 대한인간공학회지
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• 제15권2호
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• pp.51-62
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• 1996

This research utilized the psychophysical methodology, where secrw drivers are used, to determine the effects of i) the location and orientation of work objects, and ii) wearing gloves, on ratings of perceived exertion at various body parts. The validity of the psychophysical methodology in determining a preferred work pace was also studied. The subjects drove screws with a screw driver into thick wooden sheet at three vertical and three horizontal locations. They drove serews for 3 minutes at each location and assessed the condition using the psychophysical scale. The results showed that only the vertical location was a significant factor in determining the discomfort ratings. Driving screws at elbow height on the vertical surface and with the lower arm close to the body on the horizontal surface were the work locations with the smallest ratings of perceived discomfort. Wearing gloves had significant effects on reducing the pain of the hand. From the experiment in which a comfortable work pace was identified using 20 minute psychophysical adjustment, it was found that the psychophysical method is sensitive to workers perception of the physical stress when the upper limbs are employed. This was confirmend by the high correlation between the psychophysical results and EMG measurement.

• 대한인간공학회지
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• 제25권4호
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• pp.1-7
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• 2006

The purpose of this study is to develop an efficient algorithm for the management of the shift schedule in nuclear power plants in consideration with the ergonomic criteria and the regulatory codes. The ergonomic criteria considered are the work hours, overtime-work frequency and working time, start and finishing time of works, allocation of rest times and duty-offs, rotating of shifts, etc. to comply with the regulations such as the Labor Standard Act, the ILO Convention No. 171, 178, "the detailed content of a periodic safety review," enforcement regulations 19-2 of the Atomic Energy Act. The developed algorithm for the shift schedule program adopts a heuristic method to minimize the difference the workload for shift workers in nuclear power plants.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1996년도 춘계학술대회논문집
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• pp.270-275
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• 1996

본 연구에서는 인공현실감 기술을 이용하여 일종의 시뮬레이터라고 할 수 있는 자동차 주행환경을 개발하였다. 이 시스템은 Pentium PC에서 구현되었고 운전을 위하여 스티어링 휠, 클러치, 브레이크, 액 셀을 사용하였으며 속도출력을 위하여 스피드메타를 사용하였다. 이러한 입출력 장치를 하나의 통합된 모듈로 만들어서 8255 인터페이스 카드를 통하여 컴퓨터와 접속시켰다. 음향효과를 위하여 MIDI 인터페 이스, 샘플러, 스피커를 사용하였고 효과음은 샘플링하여 사용하였다. 이 밖에도 3차원 그래픽 디스플레 이를 위하여 CrystalEyes가 사용되었다. 가상세게 모델링을 위한 소프트웨어로는 Superscape VRT4.0이 사용되었다. 그래픽으로는 도심 시내 주행환경을 구현하였고, 모든 객체들은 실물 크기 비율로 그렸다. 자동차의 운전 메카니즘은 자동차 동역학을 모델링하여 계산하였다. 이러한 시스템은 주행시 운전자의 자세 및 생리신호를 측정하기 위한 환경으로 사용될 수 있으며 또한 교통안전표지나 신호등과 같은 도로 환경의 인간공학적 평가를 위해서도 사용될 수 있다.

• 대한인간공학회지
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• 제25권3호
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• pp.105-111
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• 2006

This paper summarizes the ergonomic risk assessment of hotel chef. The cooking operations were observed in order to determine sources of ergonomic stress and make recommendations to reduce the risk of work-related musculoskeletal disorders in Korean, Japanese, and western style cooking. We used interviews, document analysis, video analysis, and risk assessment to identify and quantify ergonomic risk factors. The results indicate that the cooking operations have some ergonomic problems. These findings identified in this study can be used to reduce the risk of work-related musculoskeletal disorders in food service areas.

• 대한인간공학회지
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• 제25권2호
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• pp.119-124
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• 2006

The present study evaluated the accuracy of MSD-related work criterion of Korea Ministry of Labor by using ergonomic workload evaluation methods. 1,948 manufacturing works in automobile industry were divided into 1,286 MSD-related risky works and 662 risk-free ones by using RULA, ANSI Z-365 and perceived discomfort evaluation. Then, the two types of works were evaluated by Labor Ministry work criterion to analyze the classification accuracy of the work criterion. The work criterion of Korea Labor Ministry had low hit and false alarm ratio(20 and 11%) and high miss and correct rejection ratio(80 and 89%), and the odd ratios of hit and correct rejection were 0.2 and 8.3, respectively. It can be concluded that the work criterion of Korea Labor Ministry is a conservative evaluation method which tends to evaluate a target work as risk-free.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1995년도 추계학술대회논문집
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• pp.37-37
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• 1995

CNS의 인간공학적 실험 평가 항목중 중요 요소의 하나인 운전원의 인지적 작업부하(정보입력, 의사결정, 및 정서적 부하)를 평가하기 위해 인지적부하를 부과할 수 있는 사건 시나리오 구성방법, 피실험자에 대한 훈련 방법, 실험과 디브리핑을 통한 운전원 행위 및 사건 경위 기록 체계를 개발하였다. 운전원 행위자료 데이타베이스에는 특정 요소행위 시점, 관측행위 분류, 사용된 표시장치, 의사결정내용, 사용된 조종장치, 조종행위분류, 운전원간 의사소통 내용, 정서상태, 표시장치 및 조종장치의 사용편의성 여부 및 불편이유, 주요사건 발생시점에 관한 정보가 기록되었다. 운전중 CNS 운전원에 제시되는 자극의 변화에 수반되는 운전원의 생리적 변화를 측정하여 이로부터 운전원이 받는 정신부하를 측정하는 체계를 개발하였다. 이를 위해 ECG, EEG, 호흡패턴,피부온도, 수평EOG, 수직EOG, 심박률, 및 호흡률의 생리변수에 대한 측정이 이루 어졌으며 각각의 신호를 초당 100개씩 샘플링하여 A/D 변환하고 정신부하 추정 알고리즘을 거쳐 정신부하 여부를 판정하는 점수를 구하였다. 다차원의 정신부하 판정 점수는 OR gate에 의해 통합되어 정신부하 발생시점과 함께 정신부하데이터베이스에 기록되었다.