Sökning: "space charges"

Visar resultat 21 - 25 av 33 avhandlingar innehållade orden space charges.

  1. 21. Children living with Home Mechanical Ventilation : The everyday life experiences of the children, their siblings, parents and personal care assistants

    Författare :Åsa Israelsson-Skogsberg; Carina Sparud-Lundin; Högskolan i Borås; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Home Mechanical Ventilation; children; siblings; parents; family; personal care assistants; health; family functioning; everyday life; Människan i vården; Människan i vården;

    Sammanfattning : Aim: The overall aim of this thesis was to explore the everyday life experiences of living with Home Mechanical Ventilation (HMV) from the perspective of the children and their siblings, parents and personal care assistants.Methods: Study I describes the experiences of personal care assistants (PCA) working with a ventilator-assisted person at home, based on qualitative content analysis according to Elo and Kyngäs (2008), of 15 semi-structured interviews. LÄS MER

  3. 22. Computational framework for studying charge transport in high-voltage gas-insulated systems

    Författare :Shailendra Singh; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; drift diffusion equation; gaseous dielectrics; high voltage; gas discharge; low temperature plasma; streamer propagation;

    Sammanfattning : Increasing demands in electric energy stimulates a shift in functional requirements to power distribution networks and pushes equipment manufacturers to develop highly optimized products where high rated parameters (e.g., energy, voltages) are combined with reduced geometrical dimensions of components. LÄS MER

  4. 23. Structural, Kinetic and Thermodynamic Aspects of the Crystal Polymorphism of Substituted Monocyclic Aromatic Compounds

    Författare :Michael Svärd; Åke Rasmuson; Hugo Meekes; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polymorphism; crystallization; thermodynamics; kinetics; nucleation; crystallography; solubility; phase equilibria; polymorphic transformation; solution history; metastable zone; classical theory of nucleation; two-step theory of nucleation; cluster; crystal structure prediction; lattice energy; molecular mechanics; force field; electrostatic potential; potential energy hypersurface; m-aminobenzoic acid; m-hydroxybenzoic acid; Chemical engineering; Kemiteknik;

    Sammanfattning : This work concerns the interrelationship between thermodynamic, kinetic and structural aspects of crystal polymorphism. It is both experimental and theoretical, and limited with respect to compounds to substituted monocyclic aromatics. LÄS MER

  5. 24. The fW-mean filter framework for topology optimization and analysis of Friedrichs systems

    Författare :Linus Hägg; Martin Berggren; Eddie Wadbro; Björn Engquist; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; topology optimization; filters; mathematical morphology; size control; minimum compliance problem; Friedrichs systems; well-posedness; variational formulations; linearized Euler’s equations; Galbrun’s equation; acoustics; Mathematics; matematik;

    Sammanfattning : Part I. Topology optimization is the most general form of design optimization in which the optimal layout of material within a given region of space is to be determined. Filters are essential components of many successful density based topology optimization approaches. LÄS MER

  7. 25. Dynamics of Photogenerated Charge Carriers in III-V Bulk and Nanowire Semiconductors

    Författare :Xianshao Zou; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Time-resolved spectroscopy; Group III-V semiconductor; Nanowires; Carrier recombination; Trapping; Passivation;

    Sammanfattning : As a solution to solving energy consumption and environment problems, photovoltaics has become one type of the promising devices to convert solar energy into electricity directly. In some special areas like in space, a kind of photovoltaics with lightweight and reliable properties is needed to supply power. LÄS MER