Sökning: "diffraction"

Visar resultat 1 - 5 av 943 avhandlingar innehållade ordet diffraction.

  1. 1. 3D Electron Diffraction : Application and Development towards High-quality Structure Determination

    Författare :Yunchen Wang; Wei Wan; Xiaodong Zou; Junliang Sun; Mauro Gemmi; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; three-dimensional electron diffraction; structure determination; rotation electron diffraction; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Electron crystallography has been proven to be effective for structure determination of nano- and micron-sized crystals. In the past few years, 3D electron diffraction (3DED) techniques were used for the structure solution of various types of complex structures such as zeolites, metal-organic frameworks (MOF) and pharmaceutical compounds. LÄS MER

  2. 2. Diffraction in high-energy collisions

    Författare :Christine Rasmussen; Teoretisk partikelfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; QCD; Soft QCD; phenomenology; Diffraction; Multiparton Interactions; Dipole model; Initial state evolution; BFKL evolution.; Fysicumarkivet A:2019:Overgaard;

    Sammanfattning : This thesis concerns itself with low-momentum-transfer processes in high-energy particle collisions. These processes cannot be described in the framework of the fundamental theory of quantum chromodynamics (QCD), but rely on a pre-QCD approach, the Regge theory. LÄS MER

  3. 3. Cells in Culture, Cells in Suspense : Practices of Cultural Production in Foetal Cell Research

    Författare :Andréa Wiszmeg; The Cultural Studies Group of Neuroscience; []
    Nyckelord :HUMANIORA; HUMANITIES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; HUMANIORA; MEDICAL AND HEALTH SCIENCES; HUMANITIES; Parkinson s disease; Foetal cells; Praxis; Evidence Based Practice; Ethnology; Ethnography; Science studies; Diffraction; knowledge production; Ethical issues; ethics in practice; ethnology; ethnography; science studies; foetal cells; parkinson s disease; praxis; knowledge production; ethics in practice; evidence based medicine; diffraction; cell transplantation; cross-disciplinarity; epistemology;

    Sammanfattning : Parkinson’s disease is a neurodegenerative affliction to which researchers have long striven to find a cure. The human embryo is a source of vital cells used in regenerative medicine, as well as a powerful symbol of life. LÄS MER

  4. 4. Exploiting reciprocal space : Electron diffraction, textures and precession

    Författare :Peter Oleynikov; Sven Hovmöller; Xiaodong Zou; Jean-Paul Morniroli; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; electron crystallography; electron diffraction; texture patterns; precession electron diffraction; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : Electron crystallography emerges as a new tool for accurate structure determination of very small crystals. In order to exploit the full potential of electron diffraction, the methods for data acquisition and processing have to be developed towards the high standards of X-ray crystallography. LÄS MER

  5. 5. Studies of Edge Diffraction and Scattering: Applications to Room Acoustics and Auralization

    Författare :Rendell Torres; Chalmers University of Technology; []
    Nyckelord :diffraction; virtual environments; scattering; diffusion; architectural acoustics; auralization; virtual reality; room acoustics;

    Sammanfattning : This thesis examines ways of including edge diffraction and surface scattering to improve room acoustics auralization, i.e., the binaural replication of an acoustic environment. The approach combines numerical and psychoacoustical studies to discern what level of computational accuracy is necessary to obtain perceptually adequate replication. LÄS MER