Search for dissertations about: "Coefficient of variation"

Showing result 21 - 25 of 155 swedish dissertations containing the words Coefficient of variation.

  2. 21. Lubrication of conformal contacts with surface texturing

    Author : Samuel Cupillard; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Abstract : Conformal contacts like those found in journal or inclined slider bearings are widely encountered in various types of machines from small engines to large turbines. These contacts involve convergent gaps that are used to separate the surfaces in relative motion and generate pressure in the lubricant film. READ MORE

  4. 22. Thermohydrodynamics of sliding contacts with textured surfaces

    Author : Samuel Cupillard; Paul Allaire; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : Hydrodynamic sliding contacts like those found in journal or thrust bearings are frequently encountered in various types of machinery from computers to large turbines. These contacts, involving a variation in film thickness, are used to generate pressure in the lubricant film and separate the surfaces in relative motion. READ MORE

  5. 23. Ultrasound measurements of subclinical carotid atherosclerosis : methodological and clinical studies

    Author : Emma Nyman; Christer Grönlund; Ulf Näslund; Isabel Gonçalves; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; atherosclerosis; ultrasound; carotid artery; carotid intima media thickness; carotid plaque; reproducibility; intervention; echogenicity; cardiovascular disease; hjärt- och kärlforskning;

    Abstract : Ultrasound measurements of subclinical carotid atherosclerosis have been evaluated as an additional parameter in risk evaluation of cardiovascular diseases (CVD). The overall aim of this thesis was to increase knowledge regarding ultrasound measurements of subclinical carotid atherosclerosis. READ MORE

  6. 24. Theoretical Investigations of High-Entropy Alloys

    Author : Shuo Huang; Levente Vitos; Denis Music; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : High-entropy alloys (HEAs) are composed of multi-principal elements with equal or near-equal concentrations, which open up a vast compositional space for alloy design. Based on first-principle theory, we focus on the fundamental characteristics of the reported HEAs, as well as on the optimization and prediction of alternative HEAs with promising technological applications. READ MORE

  7. 25. In the wake of a bird - Quantifying aerodynamic performance of avian flight

    Author : Marco Klein Heerenbrink; Evolutionär ekologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; animal flight; flight performance; gliding; powered flight; wing morphology; aerodynamics; biomechanics; birds; jackdaw; Corvus monedula; wind tunnel; PIV;

    Abstract : Flight is an expensive form of locomotion, but also offers the ability to travel great distances at relatively low cost. Birds have developed various adaptations for optimizing flight performance. The main aim of this thesis is to identify how morphological variables in birds affect aerodynamic drag and flight performance. READ MORE