Search for dissertations about: "Per Hedström"
Showing result 1 - 5 of 7 swedish dissertations containing the words Per Hedström.
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1. Climate change impacts on production and dynamics of fish populations
Abstract : Ongoing climate change is predicted to increase water temperatures and export of terrestrial dissolved matter (TDOM) to aquatic ecosystems influencing ecosystem productivity, food web dynamics and production of top consumers. Ecosystem productivity is mainly determined by the rates of primary production (GPP) in turn controlled by nutrients, light availability and temperature, while temperature alone affect vital rates like consumption and metabolic rates and maintenance requirements of consumers. READ MORE
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2. Fuel Cells and Biogas
Abstract : This thesis concerns biogas-operated fuel cells. Fuel cell technology may contribute to more efficient energy use, reduce emissions and also perhaps revolutionize current energy systems. The technology is, however, still immature and has not yet been implemented as dominant in any application or niche market. READ MORE
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3. Railway Infrastructure Robustness : Attributes, evaluation, assurance and improvement
Abstract : According to the European program Horizon 2020, multifaceted challenges in transportinfrastructure include 1) making infrastructure more resilient to keep pace with the increasing mobility needs; 2) reducing the impact of infrastructure on the environment;and 3) dealing with declining resources to maintain and upgrade transport infrastructure. New design and maintenance approaches must be developed to handle these issues, ascurrent methods are inadequate. READ MORE
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4. Getting up when falling down : reducing fall risk factors after stroke through an exercise program
Abstract : The purpose of this thesis was to identify fall risk individuals (+55) after stroke by validating a fall risk index and in post-stroke individuals with high risk of falls evaluate the impact of an intervention program on fall risk factors.A previously developed fall risk index was validated, modified and re-validated. READ MORE
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5. Symbol-based communication intervention for individuals with Rett syndrome : Current practices, assessment of visual attention, and communication partner strategies
Abstract : Individuals with Rett syndrome need extensive support to actively participate in social interaction and to develop their communication. The overall aim of this thesis was to investigate communication intervention for individuals with Rett syndrome, especially aided symbol-based communication and partner strategies. READ MORE