Sökning: "rapidly"

Visar resultat 1 - 5 av 2024 avhandlingar innehållade ordet rapidly.

  1. 1. Urban types in rapidly urbanising cities

    Författare :John Modestus Lupala; KTH; []
    Nyckelord :urban types; hourse forms; densily; plot characteristics; spaces and space use; spatial quality; formal and informal settlement; dar es salaam;

    Sammanfattning : One of the challenges confronting cities innon-industrialised countries today is the fact that cities aregrowing at unprecedented rates, sizes and densities. Growthtrends in these cities are largely unregulated. LÄS MER

  3. 2. Partial Discharges at Repetitive Rapidly Changing Voltages

    Författare :Elisabeth Lindell; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high dV dt; oil paper insulation.; repetitive voltages; short rise time; partial discharge measuring techniques; twisted pair; square-like voltages; corona; Partial discharges PDs ;

    Sammanfattning : Electrical insulation can today be exposed to voltages having considerably higherfrequency components than the conventional power frequency AC 50 Hz or 60 Hz,for example due to the increased use of power electronics in power systems. Thishas in a number of cases caused unexpected behaviour, including failures. LÄS MER

  4. 3. Influenza Neuraminidase : Conserved features of a rapidly mutating virus

    Författare :Henrik Östbye; Pia Ädelroth; Anice Lowen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; influenza; virology; neuraminidase; biokemi; Biochemistry;

    Sammanfattning : Influenza A viruses (IAVs) of the H1N1 and H3N2 serotypes are the major cause of seasonal influenza epidemics. IAVs are labeled based on the antigenic properties of the two surface glycoproteins and main antigens: hemagglutinin (HA/H) and neuraminidase (NA/N). LÄS MER

  5. 4. Investigations of Flow Patterns in Ventilated Rooms Using Particle Image Velocimetry : Applications in a Scaled Room with Rapidly Varying Inflow and over a Wall-Mounted Radiator

    Författare :Amir Sattari; Ivo Martinac; Mats Sandberg; Dirk Müller; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Particle Image Velocimetry PIV ; experimental study; structured light 3D scanning system; ventilation; varying flow rate; room model; wall-mounted radiator; air; water; flow; Particle Image Velocimetry PIV ; experimentell studie; scanningsystem för strukturerat 3D-ljus; ventilation; varierande tilluftsflöde; rumsmodell; väggmonterad radiator; Engineering Mechanics; Teknisk mekanik; Byggvetenskap; Civil and Architectural Engineering; Energy Technology; Energiteknik;

    Sammanfattning : This thesis introduces and describes a new experimental setup for examining the effects of pulsating inflow to a ventilated enclosure. The study aimed to test the hypothesis that a pulsating inflow has potential to improve ventilation quality by reducing the stagnation zones through enhanced mixing. LÄS MER

  7. 5. Sampling-based Path Planning for an Autonomous Helicopter

    Författare :Per Olof Pettersson; Patrick Doherty; Lars Karlsson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Path Planning; Motion Planning; Helicopters; Probabilistic Roadmaps; Rapidly-exploring Random Trees; Computer science; Datalogi;

    Sammanfattning : Many of the applications that have been proposed for future small unmanned aerial vehicles (UAVs) are at low altitude in areas with many obstacles. A vital component for successful navigation in such environments is a path planner that can find collision free paths for the UAV. LÄS MER