Sökning: "energy absorbtion"

Hittade 3 avhandlingar innehållade orden energy absorbtion.

1. 1. Dynamically loaded rock reinforcement

   Författare :Anders Ansell; KTH; []
   Nyckelord :dynamics; vibration; rock reinforcement; stress wave; energy absorbtion; rock bolt; young shortcrete; numerical model; laboratory test; field test; NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : .... LÄS MER

3. 2. Foam modeling including pore gas interaction for crashworthiness analysis

   Författare :Mats L Landervik; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Foams; Hyperelasto-viscoplasticity; Non-linear dynamics.; Staggered solution; Theory of Porous Media; Constitutive modeling;

   Sammanfattning : Foams are used in vehicles for three main functions: enhancing comfort, e.g.soft foams used in seats cushions, energy absorbtion, e.g. LÄS MER

4. 3. Attenuation correction in pulmonary and myocardial single photon emission computed tomography

   Författare :Helén Almquist; Lund Klinisk fysiologi; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; tomography; medical instrumentation; radiology; Clinical physics; downscatter; myocardial perfustion; ventilation-perfusion ratio; radiologi; pulmonary density; pulmonary perfusion; attenuation correction; SPECT; transmission measurement; tomografi; medicinsk instrumentering;

   Sammanfattning : The objective was to develop and validate methods for single photon emission computed tomography, SPECT, allowing quantitative physiological and diagnostic studies of lung and heart. A method for correction of variable attenuation in SPECT, based on transmission measurements before administration of an isotope to the subject, was developed and evaluated. LÄS MER