Sökning: "Jan Melin"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Jan Melin.

  1. 1. Some Extensions of Poincaré-Bendixson Theory Applied to a Resonant Converter

    Författare :Jan Melin; Matematik LTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Datalogi; numerisk analys; system; kontroll; numerical analysis; systems; control; Naturvetenskap; Computer science; Natural science; Poincaré-Bendixson Theory; Limit Cycles; Resonant Converter; Distributions; Piecewise Linear Systems;

    Sammanfattning : In this thesis existence and uniqueness of limit cycles are shown for a resonant converter, by extending Poincaré-Bendixson theory to non-smooth vector fields. We discuss relevant control theory and the role of simulations... LÄS MER

  3. 2. Bestämning av utläckage från dragskåp : mätteknisk studie av snabba förlopp

    Författare :Jan Melin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER

  4. 3. Measurements and Analyses of the Performancs of Laboratory Fume Hoods

    Författare :Jan Melin; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; performance test; rapid concentration changes; VAV hood controllers; infrared gas analysers; laboratory fume hoods;

    Sammanfattning : When working with health-hazardous substances or unpleasant airborne pollutants, it is important to have ventilation systems that are designed and operated to protect persons working in the laboratory. In laboratory applications, the fume hood is the most commonly used item of protective equipment. LÄS MER

  5. 4. Renal Ischemia/Reperfusion Injury in Diabetes : Experimental Studies in the Rat

    Författare :Jan Melin; Bengt Rippe; Uppsala universitet; []
    Nyckelord :Medical sciences; diabetes mellitus; ischemia reperfusion; rat; end-stage renal disease; inflammation; fibrosis; hyaluronan; CD44; treatment; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; Medicine; medicin;

    Sammanfattning : Diabetes mellitus (DM) is one of the leading causes of end stage renal failure. An increased susceptibility to renal ischemia/reperfusion (I/R)-injury was found in DM rats. Unilateral renal ischemia for as short as 20 minutes led to an irreversible progressive injury in DM kidneys, whereas the injury in non-DM kidneys was almost reversible. LÄS MER

  7. 5. On life satisfaction and vocational rehabilitation outcome in Sweden

    Författare :Roland Melin; Axel R Fugl-Meyer; Kerstin S Fugl-Meyer; Jan Ekholm; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicine; Life satisfaction; Quality of life; Epidemiology; Vocational rehabilitation outcome; Sense of coherence; Medicin; Dermatology and venerology; clinical genetics; internal medicine; Dermatologi och venerologi; klinisk genetik; invärtesmedicin; Rehabilitation Medicine; rehabiliteringsmedicin;

    Sammanfattning : This dissertation has two parts. Firstly, satisfaction with life as a whole and with 10 life domains (using an instrument termed LiSat-11 with 6-graded scales) is described in a nationally representative sample aged 18-64 years (n: 2,533) and is related to some socio-demographic circumstances. LÄS MER