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Sökning: WFRF:(Lindgren Elisabet) > Konferensbidrag

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  • Nakeva von Mentzer, Cecilia, et al. (författare)
  • Computer-assisted intervention for children with hearing impairment : Cognitive factors and phonological change
  • 2013
  • Ingår i: CHSCOM2013. - : Linköping University Electronic Press.
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Thirty-two children with hearing impairment (HI) using cochlear implants (CI) and/or hearing aids (HA), and sixteen with normal hearing (NH) participated in a computer-assisted intervention study that focused on perceiving and memorizing phonemic sounds. The first purpose was to study cognitive abilities in NH and HI children, how they related to phonological processing skills (PhPS) pre intervention and to phonological growth post intervention. The second purpose was to analyze children’s performance at different fine-grained levels of phonological processing, i.e. how they manipulated, stored and produced phonological entities of different size with or without semantic content. This was put in relation to children’s type of auditory stimulation (electrical; bilateral CI, bimodal: CI + HA and acoustical; bilateral HA). Results showed significant correlations between complex working memory and PhPS in children with HI but not in children with NH. This suggests different cognitive strategies in the children when dealing with phonological processing tasks. Poor phoneme discrimination was the strongest predictor of phonological growth in the children with HI as a function of training. Thus, the computer-assisted program was beneficial for HI children with weak initial phoneme discrimination skills. Children with CI showed reduced performance at fine-grained levels of receptive phonological processing but not on expressive phonological lexical tasks.
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  • Nordmark, Desiree, et al. (författare)
  • Evaluation of methods used to reduce leaching of harmful substances from residual fly ash fraction after washing
  • 2012
  • Ingår i: Proceedings of the Thirteenth International Symposium on Environmental Issues and Waste Management in Energy and Mineral Production. - Irvine, CA, USA : The Reading Matrix Inc..
  • Konferensbidrag (refereegranskat)abstract
    • Korstaverken near Sundsvall in Sweden produces electricity and district heating for about 80 000 citizens. Household and commercial wastes are used as fuel in their cogeneration plant. The produced fly ash is treated in an ash washing facility to reduce leaching of hazardous substances. Leaching of chromium and molybdenum from the ash residue exceeds although the limit values for non-hazardous landfills. The aim of this project has been to identify factors that influence the leaching of chromium and molybdenum and how a reduction can be achieved. Reduced mobility can be reached by addition of pH and redox reducing agents, or by carbonation. The results show that there are a number of measures that can generate a washed ash that meets the requirements of non-hazardous landfills. In order to design the optimal full scale solution from a practical and economical perspective, the identified alternatives must be evaluated.
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