Sökning: "laboratory observations"

Visar resultat 1 - 5 av 135 avhandlingar innehållade orden laboratory observations.

  1. 1. Magnetic Reconnection in Space Plasmas Cluster Spacecraft Observations

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Alessandro Retinò; Uppsala universitet.; [2007]
    Nyckelord :Space and plasma physics; space physics; plasma astrophysics; plasma physics; transport processes; boundary layers; magnetic reconnection; turbulence; particle acceleration; solar system; magnetospheres; Rymd- och plasmafysik;

    Sammanfattning : Magnetic reconnection is a universal process occurring at boundaries between magnetized plasmas, where changes in the topology of the magnetic field lead to the transport of charged particles across the boundaries and to the conversion of electromagnetic energy into kinetic and thermal energy of the particles. Reconnection occurs in laboratory plasmas, in solar system plasmas and it is considered to play a key role in many other space environments such as magnetized stars and accretion disks around stars and planets under formation. LÄS MER

  2. 2. Heat and water flows in freezing and thawing soils numerical modelling, laboratory and field observations

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Helén Engelmark; [1993]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vattenteknik; Water Resources Engineering;

    Sammanfattning : A laboratory study of infiltration rates into frozen and unfrozen fine sand, including temperature effects of both soil and infiltration water, is reported. The average infiltration rate varied from about 10.6 mm/min for unfrozen conditions, to about 1-2 mm/min for frozen conditions. LÄS MER

  3. 3. Effects of hypoxia on macrophage function in atherosclerosis

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Ellen Knutsen Rydberg; Göteborgs universitet.; Gothenburg University.; [2004]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; atherosclerosis; hypoxia; macrophage; IL-8; oxidized LDL; oxysterols; 15-lipoxygenase-2;

    Sammanfattning : Atherosclerosis is a complex disease, which affects large and medium sized arteries and is characterized by an arterial wall thickening. A constant supply of oxygen is needed to maintain cell functions in the atherosclerotic plaque. The oxygen distribution to the cells in the arterial wall depends on diffusion. LÄS MER

  4. 4. Work technique in lifting and patient transfer tasks

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Katarina Kjellberg; Göteborgs universitet.; Gothenburg University.; [2003]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; age; biomechanics; gender; lifting; low back disorders; methods; observations; nurses; patient comfort; patient handling; patient; safety; work technique;

    Sammanfattning : The overall aim of this thesis was to explore and develop methods for describing, analysing and assessing work technique in lifting and patient transfer tasks, and to study how the work technique is related to personal factors and aspects of patient quality and safety. The focus was on work technique features with implications for musculoskeletal load and for the development of musculoskeletal disorders. LÄS MER

  5. 5. Physical Activity and Alzheimer's Disease Measurements, Observations and Subjective Experiences

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ylva Cedervall; Uppsala universitet.; [2014]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Caregiver; continuity theory; dementia; dual-task; gait analysis; in-depth interview; mixed methods research; participant observation; physical capacity; qualitative; selfhood; walking; Physiotherapy; Sjukgymnastik fysioterapi; Geriatrics; Geriatrik;

    Sammanfattning : Gait disturbances such as slow walking speed and step-to-step variability have been reported among people with mild Alzheimer’s disease (AD) and as risk factors for functional decline, dependency, and falls. Additionally, AD-related emotional reactions and decreased initiative can lead to physical inactivity. LÄS MER