Search for dissertations about: "Frequency-dependence"

Showing result 1 - 5 of 32 swedish dissertations containing the word Frequency-dependence.

  2. 1. Ontogeny and Population Biology of a Sex-Limited Colour Polymorphism

    Author : Jessica Abbott; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; embryologi; ontogeni; animal morphology; embryology; Utvecklingsbiologi; Damselflies; Colour polymorphism; Development; Frequency-dependence; Morphology; growth animal ; ontogeny; Animal anatomy; Development biology; Djurs anatomi och morfologi; Population divergence; Animal ecology; Djurekologi;

    Abstract : This study has involved investigation of number of populations of the damselfly Ischnura elegans over several years, looking at frequency changes over time, morphological differences between the sexes and the morphs, differences in growth rate and development time, differences in fecundity between the morphs, and genetic differentiation between populations. I. READ MORE

  4. 2. Membrane-based nanocalorimetry for low temperature studies with high resolution and absolute accuracy

    Author : Stella Tagliati; Andreas Rydh; Vladimir M. Krasnov; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanocalorimetry; specific heat; membrane-based calorimeter; AC steady state; frequency dependence; thermal link conductance; thermal relaxation; GeAu thermometer; numerical simulations; fysik; Physics;

    Abstract : A differential, membrane-based nanocalorimeter has been designed and constructed for thermal studies of mesoscopic samples at low temperatures. The calorimeter is intended for sample masses from mg to sub-μg and a broad temperature range from above room temperature down to the sub-K region. READ MORE

  5. 3. On the forced oscillation lung function test and its design for use in children

    Author : Per-Håkan Aronsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; forced oscilliation; respiratory mechanics; averaging; lung function test; least squares method; respiratory resistance; upper airway shunting; respiratory reactance; frequency dependence of resistance;

    Abstract : .... READ MORE

  6. 4. Modelling of cavity partial discharges at variable applied frequency

    Author : Cecilia Forssén; Roland Eriksson; Hans Edin; Peter H.F. Morshuis; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; partial discharges; measurements; modelling; variable frequency; cavities; disc-shaped; polycarbonate; Electric power engineering; Elkraftteknik;

    Abstract : The presence of partial discharges (PD) in high voltage components is generally a sign of defects and degradation in the electrical insulation. To diagnose the condition of high voltage insulation, PD measurements is commonly used. READ MORE

  7. 5. Partial discharges in cylindrical cavities at variable frequency of the applied voltage

    Author : Cecilia Forssén; Roland Eriksson; Ron Brammer; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Electronic structure; Elektronstruktur;

    Abstract : Measurements of partial discharges are commonly used to diagnose the insulation system in high voltage components. Traditionally a single xed frequency of the applied voltage is used for such measurements as in the Phase Resolved Partial Discharge Analysis (PRPDA) technique. READ MORE