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  • 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>
  • 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>
  • 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>
  • Abrahamsson, Kenneth, et al. (författare)
  • Adult learning, work and citizenship : and reflections from the New Sweden '88 Adult Education Seminars in the USA and Canada, October-November 1988
  • 1989
  • Rapport (populärvet., debatt m.m.)abstract
    • <p>This document reports the activities and impressions of 30 Swedish adult educators who exchanged ideas, experiences, and research results concerning adult education and learning at more than 20 conferences and seminars organized in the United States and Canada. The foreword briefly summarizes some impressions. (Among them are that adult education is more market-oriented in the United States than in Sweden, which has a more policy-oriented system; that Sweden may have more adults being educated per capita, whereas the United States and Canada may offer a wider variety of programs; and that Sweden may be more concerned with equality as it relates to adult education, whereas personal fulfillment may be a more common value in North America.) Part 1 of the document compares and contrasts the North American and Swedish systems, including such topics as study circles, study finance, outreach activities, workplace learning, public broadcasting, and adult learning, the status of research and development in adult education and the infrastructure of adult learning. Ten references are provided for Part 1. Part 2 contains a set of black and white photographs of the Swedish educators and of people and places they encountered during their visits to North America and Canada. Part 3 provides a smorgasbord of ideas, programs, notes, and references about the trip and the ideas exchanged there</p>
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