Sökning: "particle size distributions"

Visar resultat 26 - 30 av 108 avhandlingar innehållade orden particle size distributions.

  1. 26. Radar Signatures of Auroral Plasma Instability

    Författare :Nicola Schlatter; Nickolay Ivchenko; Anja Stromme; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ionosphere; Particle Precipitation; Instability; Plasma Turbulence; Fysik; Physics;

    Sammanfattning : Incoherent scatter radars are powerful ground based instruments for ionospheric measurements. By analysis of the Doppler shifted backscatter spectrum, containing the signature of electrostatic plasma waves, plasma bulk properties are estimated. LÄS MER

  3. 27. Quantitative Electron Microscopy Studies of Metal Nanoparticle Catalysts: Nanostructure, Support Interaction and Ageing Effects

    Författare :Torben Nilsson Pingel; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; CO oxidation; strain; ageing; specimen preparation; scanning electron microscopy SEM ; FIB SEM; supported nanoparticle catalyst; transmission electron microscopy TEM ; particle size distribution PSD ; platinum;

    Sammanfattning : Heterogeneous catalysis plays a major role in modern society, for example in chemical production, sustainable energy production and emission control technologies. Metal nanoparticles (NPs) supported on oxide materials are frequent catalytic systems in this field. LÄS MER

  4. 28. Charged particle multiplicities in p̄p reactions 540 GeV C.M. energy

    Författare :Barbro Åsman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Antiproton-proton reactions at a centre of mass energy of 540 GeV are studied. The results were obtained using the UA5 detector installed at the CERN SPS Collider.The pseudorapidity (-n) distribution for non single-diffractive events is presented and compared to ISR data. LÄS MER

  5. 29. Optimization of Equipment for Tomographic Measurements of Void Distributions using Fast Neutrons

    Författare :Peter Andersson; Staffan Jacobsson Svärd; Henrik Sjöstrand; Ane Håkansson; Michael Österlund; Stephan Pomp; Rudi Van Nieuwenhove; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Sammanfattning : This licentiate thesis describes a novel nondestructive measuring technique for determiningspatial distributions of two-phase water flows. In Boiling Water Reactors, which compose themajority of the world's commercial nuclear reactors, this so called void distribution is of importance for safe operation. LÄS MER

  7. 30. Studies of aerosol particle formation from various sources using ion and electron beam analytical techniques

    Författare :Arash Gharibi; Fysiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; GUPIX; TEM; SEM; EDX; biomass combustion; traffic; road; jet droplets; film droplets; Physics; Nuclear physics; Fysik; Kärnfysik; pollution control; Environmental technology; Aerosol particles; PIXE; sources emission; tire; Arctic; Miljöteknik; kontroll av utsläpp; Fysicumarkivet A:000;

    Sammanfattning : The thesis presents the results of studies of aerosol particle formation using ion and electron beam analytical techniques. The sources of aerosol particle formation studied are the following: 1. production of primary aerosol particles in the high Arctic region during summers 2. LÄS MER