Sökning: "system rotation"

Visar resultat 1 - 5 av 154 avhandlingar innehållade orden system rotation.

  1. 1. Modelling and simulation of turbulence subject to system rotation

    Detta är en avhandling från Stockholm : KTH

    Författare :Olof Grundestam; KTH.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Direct numerical simulations; least-squares method; turbulence model; nonlinear modelling; system rotation; streamline curvature; high-lift aerodynamics; TECHNOLOGY Engineering mechanics Fluid mechanics; TEKNIKVETENSKAP Teknisk mekanik Strömningsmekanik;

    Sammanfattning : Simulation and modelling of turbulent flows under influence of streamline curvature and system rotation have been considered. Direct numerical simulations have been performed for fully developed rotating turbulent channel flow using a pseudo-spectral code. The rotation numbers considered are larger than unity. LÄS MER

  2. 2. On the Einstein-Vlasov system: Stationary Solutions and Small Data Solutions with Charged and Massless Particles

    Detta är en avhandling från Gothenburg : Chalmers tekniska högskola

    Författare :Maximilian Thaller; [2020]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; non-linear wave equation; symmetric hyperbolic system; massless Einstein-Vlasov system; Minkowski stability; Einstein-Vlasov-Maxwell system; Vector Field Method; Conformal Einstein Field Equations; Static Solutions; General Relativity; Vlasov matter;

    Sammanfattning : The Vlasov matter model describes an ensemble of collisionless particles moving through space-time. These particles interact via the gravitational field which they create collectively. In the framework of General Relativity this gravitational field is described by space-time curvature. LÄS MER

  3. 3. Neuroprotective and regenerative actions of GDNF and neurturin on nigral dopamine neurons in rat models of Parkinson’s disease – Prospects for clinical use of neurotrophic factors in neurodegenerative disorders

    Detta är en avhandling från Carl Rosenblad

    Författare :Carl Rosenblad; Lund University.; Lunds universitet.; [1999]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neurophysiology; neuropsychology; Neurology; striatum; substantia nigra; dopamine; GDNF; neurturin; sprouting; neuroprotection; forelimb akinesia; rotation; tyrosine hydroxylase; transplantation; Neurologi; neuropsykologi; neurofysiologi;

    Sammanfattning : Parkinson’s disease is characterized by progressive degeneration of the nigrostriatal dopamine system, which results in tremor, rigidity, akinesia and postural abnormalities. New therapeutic strategies are aimed at halting the neurodegenerative process or restoring the system by transplantation of fetal dopamine neurons. LÄS MER

  4. 4. The Dynamical Spin Vector Evolution of the Asteroids

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Erik Skoglöv; Uppsala universitet.; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; asteroids; Eros; Ceres; Vesta; dynamics; rotation; rotational dynamics; orbits; resonances; Astronomi; NATURAL SCIENCES Physics Astronomy and astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik; astronomi; Astronomy;

    Sammanfattning : The dynamical evolution of the spin axis direction due to gravitational and thermal factors is examined. It is found that the spin axis variations generally are regular and relatively small for the bodies in the asteroid main belt. There are also reasons to believe that this is the case for minor objects beyond the main belt. LÄS MER

  5. 5. Geodetic analysis for the Very Long Baseline Interferometry Global Observing System

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Niko Petteri Kareinen; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; VLBI; GGOS; VGOS; digital back-ends; Earth rotation; DBBC; automated analysis; EOP; UT1;

    Sammanfattning : Very Long Baseline Interferometry (VLBI) is an essential technique forspace-geodesy. It realizes the International Celestial Reference Frame(ICRF) and provides a link between the Earth- and space-fixed coordinatesystems by directly observing all Earth Orientation Parameters (EOP)simultaneously. LÄS MER