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- Geng, Qiuqing, et al.
(författare)
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Change in contact temperature of finger touching on cold surfaces
- 2001
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Ingår i: International Journal of Industrial Ergonomics. - 0169-8141 .- 1872-8219. ; 27:6, s. 387-391
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Tidskriftsartikel (refereegranskat)abstract
- This study deals with human fingers touching cold surfaces of four materials (aluminium, steel, nylon and wood) at different surface temperatures (-20°C, -15°C, -10°C, -4°C, 0°C and 2°C). Contact finger skin-surface interface temperature and subjective responses on thermal and pain sensations were determined during touching. Type of material and their surface temperature clearly affected the contact cooling of the finger. Individual variation in finger contact cooling was significant. Contact temperature limits for human fingers touching cold surfaces are suggested according to the experimental results. In addition, time to reach a critical temperature (7°C, 5°C or 0°C) when contacting a cold metallic surface is discussed.
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- Giedraityte, Lina, et al.
(författare)
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Validation of methods for determination of metabolic rate in the Edholm scale and ISO 8996
- 2001
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Ingår i: International Journal of Occupational Safety and Ergonomics. - : Informa UK Limited. - 1080-3548 .- 2376-9130. ; 7:2, s. 135-48
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to validate the Edholm scale (Edholm, 1966) and the ISO 8996 standard (International Organization for Standardization [ISO], 1990) by comparing the metabolic rates estimated for both methods with the actual measured metabolic rate (MMeas) in 6 manual material handling tasks simulated under laboratory conditions. The metabolic rate was calculated from oxygen consumption VO2 (19 participants) according to Standard No. ISO 8996 (ISO, 1990). Additionally, the participants estimated perceived exertion using the Borg scale. The metabolic rates derived from the Edholm scale (MEdh) overestimated 5 of 6 activities by 34-50% (alpha = .05). The metabolic rates derived from ISO 8996 (MISO) overestimated all activities by 7-38% (alpha = .05).
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