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Showing result 1 - 5 of 85 essays matching the above criteria.

  1. 1. Effects of Ultrafast Ionization in X-ray Coherent Diffraction Imaging

    University essay from KTH/Kemi

    Author : Arezu Sehati; [2023]
    Keywords : Coherent Diffraction Imaging; X-ray Free Electron Lasers; Refractive index; Core-shell nanoclusters; Rare-gas ionization; Koherent Diffraktionsavbildning; Röntgenfrielektronlaser; Brytningsindex; Core-shell-nanokluster; Ädelgasjonisering;

    Abstract : Koherent Diffraktionsavbildning med en intensiv röntgenpuls från en Frielektronlaser har möjliggjort strukturbestämning av isolerade nanopartiklar som inte går att studera med hjälp av konventionella metoder, så som elektronmikroskopi. En mycket kort pulslängd tillsammans med spridningssignalens beroende av objektets elektroniska struktur medför också möjligheten att studera inducerad ultrasnabb dynamik med denna teknik. READ MORE

  3. 2. Potassium in the Galactic Bulge - as traced by microlensed dwarf & sub-giant stars

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Lukas Jönsson; [2023]
    Keywords : Nucleosynthesis; Galactic Bulge; Potassium; Non-Local-Thermal-Equilibrium; Physics and Astronomy;

    Abstract : During this report the potassium (K) trend in the Galactic Bulge, with respect to metallicity and various α-elements, has been computed and evaluated by a method of line synthesis on the 7698.96 ̊A KI line (7699 KI), where Non-Local-Thermal-Equilibrium (NLTE) effects have been considered. READ MORE

  4. 3. The tangled Warp of the Milky Way

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Viktor Hrannar Jónsson; [2023]
    Keywords : Galaxy: structure; Galaxy: kinematics and dynamics; Galaxy: disk; Galaxy: evolution; Physics and Astronomy;

    Abstract : Context: The Milky Way disc, like the discs of many other spiral galaxies, has been shown to be warped. The growing astrometric data set for stars produced by the Gaia mission allows for more detailed studies of the stellar disc's warp. READ MORE

  5. 4. How to paint a picture : A discourse analysis of the media portrayal of hacker attacks against vital societal functions in Sweden

    University essay from Uppsala universitet/Statsvetenskapliga institutionen

    Author : Viktoria Galyas; [2023]
    Keywords : cybersecurity; vital societal functions; critical infrastructure; New Public Management NPM ; outsourcing; privatization; Public Private Partnership PPP ; Digital Supply Chain DSC ; discourse; discourse analysis; discursive connections; Bacchi; Sweden;

    Abstract : In our highly digitalized society, the dependence on digital solutions and systems is integral to the function of society. While digitalization has brought numerous benefits, it has also exposed society to vulnerabilities, making it susceptible to cyberattacks. READ MORE

  6. 5. Improving the understanding of photoelectron currents on Solar Orbiter : Utilizing theory and empirical measurements

    University essay from Uppsala universitet/Institutet för rymdfysik, Uppsalaavdelningen

    Author : Melker Marminge; [2023]
    Keywords : Solar Orbiter; Photoelectric Currents; Photoelectric Effect; Thermal Bending; Outgassing; Thermionic Emission; Numerical Approximation; Physical Modeling;

    Abstract : Spacecraft experience electric currents on conductive materials exposed to sunlight, which introduces noise in scientific data. These currents are mainly due to the photoelectric effect and should therefore be proportional to the inverse square heliocentric distance. READ MORE