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Sökning: WFRF:(Abeysekera John D.A.)

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  • Föregående 1[2]34Nästa
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11.
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12.
  • Abeysekera, John D.A., et al. (författare)
  • Ergonomics assessment of selected dust respirators : their use in the tropics
  • 1987
  • Ingår i: Applied Ergonomics. - 0003-6870 .- 1872-9126. ; 18:4, s. 266-72
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The suitability and effectiveness of four different types of British made respirators were studied with respect to comfort, convenience and fit on wearers in Sri Lanka (a developing country). Objective and subjective assessments were made to evaluate the degree of discomfort and interferences to the use of senses. The study revealed that factors such as breathing resistance, work-rate and activity period affected the physiological responses. The weight of the respirator and the skin temperature had no direct relationship with the cardiovascular stress. Positive-pressure respirators that gave lower face temperatures than negative-pressure masks gave this type of respirator an additional advantage in hot environments. Respirators that restricted jaw movement affected the speech intelligibility of the wearer. Orinasal masks restricted vision more than the other types. The problem of fit was found negligible though head and face dimensions significantly differed between the British and the Sri Lankans. Subjective assessment correlated well with objective tests.</p>
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13.
  • Abeysekera, John D.A., et al. (författare)
  • Ergonomics evaluation of modified industrial helmets for use in tropical environments
  • 1988
  • Ingår i: Ergonomics. - 0014-0139 .- 1366-5847. ; 31:9, s. 1317-1329
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Hotness, weight, fitting problems etc., have been found to be the chief causes of the unpopularity of industrial safety helmets in tropical environments in developing countries (DC). Some selected safety helmets manufactured in industrialized countries (IC) were modified to provide extra head ventilation and to reduce weight, in order to make them more acceptable to users in hot environments. The modified helmets were subjected to ergonomics evaluation both objectively and subjectively in the laboratory (in simulated tropical conditions) as well as in the field situation. There was evidence that white helmets had some advantages in comfort, viz. reduction of hotness, compared to the other colours, e.g. red, green etc., when worn in the presence of radiant heat in the laboratory. Ventilation holes provided at the top of the shell seemed to reduce the greenhouse effect within the helmet shell which therefore felt less uncomfortable than a fully covered helmet. Even with a small reduction of weight, such as 45 g in helmets weighing about 350g, the difference in weight was perceived by the wearers. In adapting helmets made in IC for use in tropical climates, head ventilation and low weight perception are important aspects in comfort which need to be considered. In addition to low cost, a harness material suitable for sweat absorption is required. Adjustability and sizing to fit 90% of the user population also needs to be considered in the design and manufacture of safety helmets for people in DC.</p>
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14.
  • Abeysekera, John D.A. (författare)
  • Ergonomics for effective collaboration
  • 1997
  • Ingår i: African Newsletter on Occupational Health and Safety. - 0788-4877. ; :2, s. 27
  • Tidskriftsartikel (övrigt vetenskapligt)
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15.
  • Abeysekera, John D.A., et al. (författare)
  • Ergonomics in developing countries
  • 1990
  • Ingår i: Advances in industrial ergonomics and safety 2 : proceedings of the annual International Industrial Ergonomics and Safety Conference held in Montreal, Quebec, Canada, 10-13 June 1990. - Taylor and Francis Group. - 0-85066-748-8 ; s. 771-778
  • Konferensbidrag (refereegranskat)
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16.
  • Abeysekera, John D.A., et al. (författare)
  • Ergonomics of technology transfer
  • 1987
  • Ingår i: International Journal of Industrial Ergonomics. - 0169-8141 .- 1872-8219. ; 1:4, s. 265-272
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>It is beyond doubt that high technology has elevated the standards of living of mankind. The modern technology created and developed to a great extent by Western or developed societies is now in great demand in Eastern and developing societies who are trying to leap-frog towards advancement. But unfortunately, in the transfer of technology, both the giver and the receiver seem to make many mistakes. A technology transferred without considering the ethnic variables in the societies and differences in the climates, has found to cause problems to the acquirer. Due to the basic human factor differences such as sizes of people, physical environment, physical capacities and organizational and cultural differences, a technology which is unadapted has found to be inappropriate, harmful, hazardous and unsuccessful. In the areas of health, working conditions, production and finance, undesirable effects have resulted through haphazard technology transfer, For a successful transfer, it is therefore stressed that technology has to be adapted or modified taking into consideration the technological, anthropological and socio-economic factors of the acquiring population</p>
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17.
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18.
  • Abeysekera, John D.A., et al. (författare)
  • Heat transfer characteristics of industrial safety helmets
  • 1991
  • Ingår i: Towards human work : solutions to problems in occupational health and safety. - London : Taylor and Francis Group. - 0-7484-0039-7 ; s. 297-303
  • Bokkapitel (populärvet., debatt m.m.)
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  • Resultat 11-20 av 38
  • Föregående 1[2]34Nästa
 
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