Sökning: "Fracture frequency"

Visar resultat 1 - 5 av 55 avhandlingar innehållade orden Fracture frequency.

  1. 1. Investigation of the correlation of fracture frequency and electric resistivity in impact craters in crystalline rocks

    Författare :Ann Bäckström; KTH; []
    Nyckelord :Electric resistivity; Fracture frequency; Impact generated fractures; Electro-magnetic techniques; VLF-R method; MT method; Window-mapping technique; Three-dimensional fracture calculations; heat-exchange structure; geothermal energy;

    Sammanfattning : Impact craters are formed when a large meteorite or comethits the Earth. At the impact a shock wave is released causingabundant fracturing in the surrounding bedrock. This type offracturing is intense and occurs throughout a very large volume(>100 km3) of the bedrock. LÄS MER

  3. 2. Low Frequency Acoustic Excitation and Laser Sensing of Vibration as a Tool for Remote Characterization of Thin Sheets

    Författare :Etienne Mfoumou; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nondestructive testing; remote acoustics; slow dynamics; nonequilibrium dynamics; resonance frequency; material characterization; vibration-based technique; fracture toughness;

    Sammanfattning : There is a need to monitor the existence and effects of damage in structural materials. Bulk components provide a much publicized example, but the need exists in a variety of other structures, such as layered materials used in food packaging industries. LÄS MER

  4. 3. Studies on the complications and prediction of mortality after hip fracture surgery

    Författare :Carl Mellner; Sebastian Mukka; Per Morberg; Olof Sköldenberg; Björn Knutsson; Lasse Lapidus; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hip fracture; femoral neck fracture; treatment; total hip arthroplasty; hemiarthroplasty; internal fixation; outcome; infection; periprosthetic joint infection; mortality;

    Sammanfattning : An elderly patient who sustains a hip fracture has increased morbidity and mortality. Scandinavia presents the highest incidence annually of hip fractures worldwide. Femoral neck fracture (FNF) of the hip accounts for 50% of all hip fractures in geriatric patients. LÄS MER

  5. 4. Plane wave electromagnetic measurements for imaging fracture zones

    Författare :Lena Persson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geophysics; Electromagnetic Measurements Fracture Zones; Geofysik; Geophysics; Geofysik; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

    Sammanfattning : Electromagnetic fields from distant radio transmitters interact with the resistivity structures in the earth. They can be regarded as plane-wave fields since their penetration depth is much smaller than their wavelength. LÄS MER

  7. 5. Life after hip fracture - Impact of home rehabilitation versus conventional care and patients' experiences of the recovery process in a short- and long-term perspective

    Författare :Lena Zidén; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Hip fracture; recovery; home rehabilitation; RCT; longitudinal; interviews; phenomenography; balance confidence; independence; supported discharge;

    Sammanfattning : Aim In a short- and long-term perspective compare a geriatric home rehabilitation programme (HR) for patients with hip fracture with conventional care (CC), and to capture the patients experience of the consequences of the injury and their conceptions of what influences the recovery process. Method The thesis is based on two quantitative and two qualitative studies. LÄS MER