Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
권호 표지
DOI QR코드

DOI QR Code

Joint Angles of Comfort for Females Based on the Psychophysical Scaling Method

심물리학적 방법을 이용한 여성의 안락 동작범위

  • 기도형 (계명대학교 기계.자동차공학부)
  • Published : 2002.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study aims to provide joint angles of comfort for females, based on the psychophysical scaling method. Ten female subjects participated in the experiment for measuring perceived discomfort for varying joint motions. The subjects were instructed to maintain given joint motions for a minute, and to rate their perceived discomfort for the motions during a minute's rest by using the free modulus method of the magnitude estimation. Joint angles of comfort were calculated from the regression equations based on the experimental results, in which levels of joint motions were used as independent variables and perceived discomforts as dependent variables. The results showed that joint angles of comfort for the joint motions investigated were much smaller than full range of motions for corresponding joint motions. The ratios of joint angle of comfort to its range motion for the hip were found to be smallest of all joint motions dealt with in this study, and those for the neck were the largest. In addition, comfortable joint angles for females were much smaller than those for males. It is recommended that when designing or evaluating workplaces ergonomically, different comfortable joint angles should be applied according to workers' or population's gender.

Keywords

References

  1. 기도형，‘작업장 설계와 평가를 위한 한국인관절의 안락 동작범위 측정' 대한인간공 학회지, 16(2), 73-82, 1997
  2. 기도형，‘인체 관절 동작의 지각 불편도에 근거한 상체의 자세 분류 체계의 개발' 대 한산업공학회지，24(3), 447-455. 1988
  3. 동아일보，‘허리통증...어깨 뻐근 등 컴퓨터 직업병 급증‘ 2001.4.23
  4. 한국산업안전공단，인간공학적 작업장 개선，한국산업안전공단，2001
  5. Aaras, A, Westgaard, R.H. and Stranden, E., 'Postural angles as an indicator of postural load and muscular injury in occupational work situations.' Ergonomics, 31, 915-933, 1988
  6. Burdorf, A., Govaert, G. and Elders, L., 'Postural load and back pain of workers in the manufacturing of prefabricated elements.' Ergonomics, 34, 909-918, 1991
  7. Chaffin, D.B., 'Localized muscle fatigue-definition and measurement.' Journal of Occupational Medicine, 15, 346-354, 1973
  8. Chaffin, D.B. and Andersson, G.B.J., Occupational biomechanics, 2nd ed., John Wiley & Sons Inc.: New York, 1991
  9. Corlett, E.N., 'Pain, posture and performance,' In EN Corlett and J. Richardson (Ed), Stress, work design and productivity, Wiley, London, 27-42, 1981
  10. Gescheider, GA., Psychophysics: Method, theory, and application, 2nd ed., Lawrence Erlbaum Associates: London, 1985
  11. Grandjean, E., Fitting the task to the man: A textbook of occupational ergonomics, 4th ed., Taylor & Francis: London, 1988
  12. Han, S. H., Song, M. and Kwahk, J., 'A systematic method for analyzing magnitude estimation data.' International Journal of Industrial Ergonomics, 23, 513-524, 1999
  13. Haslegrave, C.M., 'What do we mean by a 'working posture'?.' Ergonomics, 37, 781-799, 1994
  14. Hsiao, H. and Keyserling, W.M., 'Evaluating posture behavior during seated tasks.' International Journal of Industrial Ergonomics, 8, 313-334, 1991
  15. http://home.kosha.net/coddr/data/trend.htm
  16. Hwang, c.1. and Yoon, K, Multiple decision making: Method and application, Spring-Verlag: New York, 1981
  17. Kelsey, J.L., Githens, P.B., White III, AA, Holford, T.R., Walter, S.D., O'Connor, S.D.T., Ostfeld, AM., Weil, U, Southwick, W.O. and Calogero, J.A, 'An epidemiologic study of lifting and twisting on the job and risk for acute prolapsed lumbar intervertebral disc.' Journal of Orthopaedic Research, 2, 61-66, 1984
  18. Keyserling, W.M., Punnett, L. and Fine, L.J., 'Trunk posture and back pain: Identification and control of occupational risk factors.' Applied Industrial Hygiene, 3, 87-92, 1988
  19. Kilbom, A, Persson, J. and Jonsson, B.G., 'Disorders of cervicobrachial region among female workers in the electronics industry.' International Journal of Industrial Ergonomics, 1, 37-47, 1986 https://doi.org/10.1016/0169-8141(86)90006-5
  20. Marras, W.S., Lavender, SA, Leurgans, S.E., Rajulu, S.L., Allread, W,G., Fathallah, FA and Ferguson, S.A., 'The role of dynamic three-dimensional trunk motion in occupationally-related low back disorders: The effects of workplace factors, trunk position, and trunk motion characteristics on risk of injury.' Spine, 18(5), 617-628, 1993
  21. Moore, A., Wells, R.P. and Ranney, D., 'Quantifying exposure in occupational manual tasks with cumulative trauma disorder potential.' Ergonomics, 34(12), 1433-1453, 1991
  22. Murrell, K, Ergonomics, Chapmann and Hall: London, 1009
  23. Punnett, L. and Keyserling, W.M., 'Exposure to ergonomic stressors in the garment industry: Application and critique of job-site work analysis methods.' Ergonomics, 30(7), 1099-1116, 1987
  24. Punnett, L., Fine, L.J., Keyserling; W.M., Herrin, G.D. and Chaffin, D.B., 'Back disorders and nonneutral trunk postures of automobile assembly workers:' Scandinavian Journal of Work and Environment, 17, 337-346, 1991
  25. Rebiffe, R., 'An ergonomic study of the arrangement of the driving position in motor cars,' Proceedings of the Institution of Mechanical Engineers, 181, Part 3D(pp. 43-50), 1006-1007
  26. Ryan, G.A., 'The prevalence of musculo-skeletal symptoms in supermarket workers.' Ergonomics, 32, 359-371, 1989
  27. Silverstein, B.A, Fine, L.J. and Armstrong, T.J., 'Hand-wrist cumulative trauma disorders in industry.' British Journal of Industrial Medicine, 43, 779-784, 1986
  28. Silverstein, B.A., Fine, L.J. and Armstrong, T.J., 'Occupational factors and carpal tunnel syndrome:' American Journal of Industrial Medicine, 11, 343-358, 1987
  29. Spilling, S., Eitrheim, J. and Aaras, A, 'Cost-benefit analysis of work environment investment at STK's telephone plant at Kongsvinger,' In N. Corlett, J. Wison and I. Manenicat(Ed), The ergonomics of working postures, Taylor & Francis, London, 380-397, 1986