Sökning: "loss ratio"

Visar resultat 11 - 15 av 313 avhandlingar innehållade orden loss ratio.

  1. 11. Directly exposed electron-detectors for electron energy-loss spectroscopy

    Författare :Claes Orsholm; Tomas Lindblad; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning : This thesis investigates the possibilities of using planar silicon-devices such as the photodiode array and the charge-coupled device (CCD) as directly exposed electron-detectors for electron energy-loss spectroscopy. The aim is to achieve an acceptable performance at low signal intensities, enabling single electron detection. LÄS MER

  3. 12. Significane of loss models in aerothermodynamic simulation for axial turbines

    Författare :Ning Wei; KTH; []
    Nyckelord :;

    Sammanfattning : This thesis deals with a study of the significance of lossmodels and their applications in simulation and optimisation ofaxial turbines. The design of a turbomachine system is a verycomplex engineering operation which can be looked upon as aniterative procedure made of various steps. LÄS MER

  4. 13. Lumbar spinal stenosis : Body mass index and the patient's perspective

    Författare :Björn Knutsson; Karl Michaëlsson; Bengt Sandén; Göran Sjödén; Paul Gerdhem; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Antonovsky; back pain; BMI; body mass index; Bygghalsan; cohort study; coping; EQ-5D; excess weight; leg pain; LSS; lumbar spinal stenosis; obesity; ODI Oswestry disability index; overweight; patient-centered; patient-physician relationship; patient-perspective; patient-related-outcome-measure; PROMs; qualitative study; spinal stenosis; salutogenesis; salutogenic; sciatica; spine surgery; suffering; Swedish spine register; Swespine; VAS; weight loss; weight change; Orthopaedics; Ortopedi;

    Sammanfattning : During recent decades, lumbar spinal stenosis (LSS) has become the most common indication for spine surgery, a change that coincides with a higher worldwide prevalence of overweight and obesity. Thus, surgical treatment of LSS in the overweight and obese population is common and increasing in scope. LÄS MER

  5. 14. Acoustical properties of earplugs

    Författare :Per Hiselius; Teknisk akustik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; vibration and acoustic engineering; vacuum technology; hydraulics; Mechanical engineering; acoustic modelling; objective measurement; insertion loss; earplugs; HPE; HPD; hearing protectors; Two-Port; Four-Pole; attenuation; electro acoustics; acoustics;

    Sammanfattning : In this study an experimental setup for measurements of high impedance objects in ducts, yielding the acoustical Two-Port properties of the object, is applied to earplugs. A frequently used experimental setup for measuring objective acoustical properties of earplugs is that of artificial ears. Great effort is spent on duplicating the human ear. LÄS MER

  7. 15. Molecular and clinical genetic studies of a novel variant of familial hypercalcemia

    Författare :Eva Szabo; Jan Zedenius; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; hyperparathyroidism; calcium receptor; hypercalcemia; allelic loss; autosomal inheritance; Kirurgi; Surgery; Kirurgi; Kirurgi; Surgery;

    Sammanfattning : Familial primary hyperparathyroidism (HPT) is a rare disorder that is treated surgically and mostly occurs in association with tumor-susceptibility syndromes, like multiple endocrine neoplasia and the hyperparathyroidism-jaw tumor syndrome. Familial hypercalciuric hypercalcemia (FHH) is another cause of hereditary hypercalcemia that generally is considered to require no treatment and is genetically and pathophysiologically distinct from HPT. LÄS MER