Search for dissertations about: "beyer"

Found 5 swedish dissertations containing the word beyer.

  1. 1. Deep levels in SiC

    Author : Franziska C. Beyer; Erik Janzén; Carl Hemmingsson; Jörg Weber; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : Silicon carbide (SiC) has been discussed as a promising material for high power bipolar devices for almost twenty years. Advances in SiC crystal growth especially the development of chemical vapor deposition (CVD) have enabled the fabrication of high quality material. READ MORE

  2. 2. Spin Properties in InAs/GaAs Quantum Dot based Nanostructures

    Author : Jan Beyer; Weimin Chen; Irina Buyanova; Hongqi Xu; Linköpings universitet; []
    Keywords : ;

    Abstract : Semiconductor quantum dots (QDs) are a promising building block of future spin-functional devices for applications in spintronics and quantum information processing. Essential to the realization of such devices is our ability to create a desired spin orientation of charge carriers (electrons and holes), typically via injection of spin polarized carriers from other parts of the QD structures. READ MORE

  3. 3. Physical exercise and mental health among older people : measurement methods and exercise effects focusing on people living in residential care facilities

    Author : Mia Conradsson; Erik Rosendahl; Yngve Gustafson; Håkan Littbrand; Nina Beyer; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; aged; residential facilities; depression; exercise; dementia; cognitive disorders; postural balance; validation studies; reproducibility of results; randomized controlled trial; sjukgymnastik; Physiotherapy;

    Abstract : The aim of this thesis was to study the effects of exercise on mental health among older people living in residential care facilities. The aim was also to study the reliability of an assessment scale for balance function and the usefulness of an assessment scale for depressive symptoms among older people, including people with cognitive impairments. READ MORE

  4. 4. Investigation of deep levels in bulk GaN

    Author : Tran Thien Duc; Erik Janzén; Franziska C. Beyer; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The first gallium nitride (GaN) crystal was grown by hydride vapor phase epitaxy in 1969 by Maruska and Tietjen and since then, there has been an intensive development of the field, especially after the ground breaking discoveries concerning growth and p-type doping of GaN done by the 2014 year Nobel Laureates in Physics, Isamu Akasaki, Hiroshi Amano and Shuji Nakamura. GaN and its alloys with In and Al belong to a semiconductor group which is referred as the III-nitrides. READ MORE

  5. 5. Magnetic resonance imaging markers of cerebral small vessel disease in an elderly population – association with cardiovascular disease and cognitive function

    Author : Ruta Nylander; Elna-Marie Larsson; Mona K. Beyer; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging; cerebral perfusion; small vessel disease; cognitive function; Radiology; Radiologi;

    Abstract : Cerebral small vessel disease (SVD) is identifiable by clinical, neuroimaging, neuropathological and cognitive findings.The aim of this thesis was to assess SVD and cerebral perfusion on magnetic resonance imaging (MRI) in a 75-year-old population and compare the findings with scars of myocardial infarctions, cardiovascular risk markers and cognitive function. READ MORE