Sökning: "ageing"

Visar resultat 1 - 5 av 597 avhandlingar innehållade ordet ageing.

  1. 1. Avoiding ageing : Surface degradation of commercial electrode materials in lithium-ion batteries

    Författare :Erik Björklund; Kristina Edström; Daniel Brandell; Reza Younesi; Frank Renner; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Li-ion battery; Ageing; Photoelectron spectroscopy; Nickel Manganese Cobalt Oxide;

    Sammanfattning : The battery market today expands rapidly, not least for electric vehicles. But to compete against the combustion engine, the cost of batteries must be reduced. After years of usage, the batteries degrade and need to be exchanged, increasing the cost over the vehicle lifecycle. LÄS MER

  2. 2. Ageing of Asphalt Mixtures : Micro-scale and mixture morphology investigation

    Författare :Prabir Kumar Das; Björn Birgisson; Nicole Kringos; Andreas Loizos; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Ageing; Aggregate packing; Atomic force microscopy; Asphalt mixture; Bitumen; Diffusion; Finite element analysis; Gradation; Micro-structure; Mixture morphology; Oxidative ageing; Surface ageing;

    Sammanfattning : There are many variables that affect the viscoelastic properties of asphalt mixtures with time, among which age hardening may be considered one of the important ones. Age hardening of asphalt mixtures is an irreversible process, which contributes to a reduction of the durability of pavements and eventually increases the maintenance cost. LÄS MER

  3. 3. Recycling and durability of PVC materials focusing on pre- and post-consumer wastes from building products

    Författare :Nazdaneh Yarahmadi; Chalmers University of Technology; []
    Nyckelord :Accelerated ageing; Activation energy; Annealing; Cables; Dehydrochlorination; Dismantling; DSC; Elongation at break; Emissions; Energy recovery; Flooring; Heat ageing; Lifetime; Orientation; Physical ageing; Plasticised PVC; Plasticiser depletion; Profiles; Recycling; Repeated extrusion; Residual stability; Rigid PVC; Sustainable building; Chlorination; Degradation; Durability; Mechanical properties; Plastic building materials; Plasticizers; Stabilizers agents ; Tensile properties; Molecular level; Polyvinyl chlorides; energy recovery; flooring; repeated extrusion; accelerated ageing; rigid PVC; plasticiser depletion; activation energy; profiles; recycling; annealing; heat ageing; plasticised PVC; orientation; sustainable building; elongation at break; dehydrochlorination; lifetime; physical ageing; residual stability; dismantling; emissions; cables;

    Sammanfattning : The potential for recycling various polymeric materials contained within buildings constructed in the late 1960s and 1970s in Sweden was investigated during the course of this work. Three residential blocks were studied to establish the quantity of materials available for recycling, to investigate the difficulty in and time needed for the dismantling of the buildings, the degree of purity of the materials, and the possibility of separating the materials. LÄS MER

  4. 4. Att åldras med funktionshinder : Betydelser av socialt och kronologiskt åldrande för människor som under lång tid levt med fysiska funktionsnedsättningar

    Författare :Annika Taghizadeh Larsson; Eva Jeppsson-Grassman; Rafael Lindqvist; Linköpings universitet; []
    Nyckelord :Disability; impairment; functioning; age; ageing; age norms; subjective age; life course; pensioner; time; biographical disruption; Funktionshinder; funktionsnedsättning; funktionstillstånd; ålder; åldrande; åldersnormer; upplevd ålder; livslopp; pensionär; tid; biografiskt brott; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP;

    Sammanfattning : Ålderns och åldrandets betydelser för människor som under lång tid har levt med fysiska funktionsnedsättningar har hittills fått begränsad uppmärksamhet såväl i forskning som i andra sammanhang. Samtidigt pekar såväl åldersgränser i det offentliga stödsystemet som tidigare forskning mot att ålder och åldrande kan få speciella innebörder för människor som lever med funktionshinder. LÄS MER

  5. 5. Ageing well : mobile ICT as a tool for empowerment of elderly people in home health care and rehabilitation

    Författare :Anita Melander-Wikman; Luleå tekniska universitet; []

    Sammanfattning : The ageing of Europe's population is a crucial challenge for the 21st century. Today, the mean life expectancy in Sweden is 83 years for women and 78 for men. Ageing well is a frequently used process, describing the objectives of future elderly care and rehabilitation. LÄS MER