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자료유형
학술대회자료
저자정보
Insoo Kim (Rural Development Administration) Kyung-Suk Lee (Rural Development Administration) Hye-Seon Chae (Rural Development Administration) Kyung-Su Kim (Rural Development Administration) Dong-Phil Choi (Rural Development Administration)
저널정보
대한인간공학회 대한인간공학회 학술대회논문집 2016 대한인간공학회 춘계학술대회 및 한·일 공동심포지엄
발행연도
2016.6
수록면
653 - 656 (4page)

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Objective: In this study, an evaluation using just noticeable difference (JND) was performed to estimate a safe weight in livestock feed sack lifting among the manual materials handling (MMH) tasks performed by elderly farmers. Background: Since there is not a recommendation about weight handling despite the increase of the number of elderly farmers, they may be easily exposed to the risk factors of musculoskeletal diseases. Therefore, it is necessary to suggest a safety weight for weight handling. Method: Two groups of subjects consisting of male farmers and female farmers, respectively, participated in the experiment. The subjects performed lifting task with nine different levels of comparative weights with respect to seven standard weights. The measurement results were analyzed on the basis of JND and the Borg’s scale. Results: The JND evaluation showed a significant difference depending on the weight levels (p< .001). The regression model-based estimation showed that the maximum load was 20.69 kg in the male farmers and 20.08 kg in the female farmers. This result was consistent with the result based on the Borg’s scale. Conclusion: The present study showed that JND is applicable to the evaluation of lifting task, particularly, enabling to estimate the psychophysical change with respect to physical work load. Application: The result of the present study may be used to provide a recommendation of allowable weight load for elderly farmers.

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ABSTRACT
1. Introduction
2. Method
3. Results
4. Conclusion
References

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