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- Abeysekera, John, et al.
(författare)
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Some design recommendations to improve comfort in helmets : a case study from China
- 1996
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Ingår i: Journal of Human Ergology. - 0300-8134. ; 25:2, s. 145-154
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Tidskriftsartikel (refereegranskat)abstract
- Unless the basic user needs are satisfied in safety helmets, it is difficult to get workers to wear them habitually and for long periods. Hotness, weight and fitting problems are major wearability issues that require improvements. The enormous need for an optimally designed helmet in China prompted a case study on comfort aspects in helmets. The subjective impressions of the wearers of test helmets provided useful information for design changes to improve comfort. The heat transfer measurements through helmets indicated the need for ventilation openings to be provided on the shell of plastic helmets. Due to the advantage of low weight and good ventilation, it is recommended that cane helmets be further developed to improve protection, wearability and durability, and subsequently be produced in large scale
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- Bergquist, Karin, et al.
(författare)
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A method for dynamic measurement of the resistance to dry heat exchange by footwear
- 1997
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Ingår i: Applied Ergonomics. - 0003-6870 .- 1872-9126. ; 28:5-6, s. 383-388
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Tidskriftsartikel (refereegranskat)abstract
- Five different types of cold protective footwear have been tested with regard to their resistance to dry heat loss (i.e. the insulation) with a new electrically heated foot model. The model is able to simulate ‘walking' movements in order to provide a more realistic simulation of wear conditions. Thermal insulation of shoes with and without a steel toe cap was the same. The insulating properties during simulated walking movements were 10-25% lower compared with static conditions. For two of the shoe models a significantly lower insulation value for the sole area was obtained when adding a weight of 30 kg. A significant difference could also be found between the insulation values of two different sizes of one of the models. Measurements with the standard method (EN 344) correlated well with the local insulation value of the sole part of the thermal foot. Correlation with the insulation value for the whole shoe was much less, variation was bigger and ranking in terms of cold protection differed between methods. The electrically heated foot model appears to provide a reproducible, accurate and more realistic method for measuring the insulation properties of shoes than EN 344.
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7. |
- Bouskill, Lisa M., et al.
(författare)
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The relationship between ventilation index and thermal insulation
- 1998
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Ingår i: Proceedings / ICCE8 the 8th International Conference on Environmental Ergonomics, 18-23 October 1998, San Diego, California, USA. - : International Conference on Environmental Ergonomics. - 0966695305
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Konferensbidrag (refereegranskat)
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- Gavhed, Desirée, et al.
(författare)
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Mastarbete i kyla
- 1999
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Rapport (övrigt vetenskapligt/konstnärligt)
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