Sökning: "diffusion spectrum"

Visar resultat 1 - 5 av 22 uppsatser innehållade orden diffusion spectrum.

  1. 1. Color halftoning methods for screen printing and special effect pigments : Reproducing iridescent colors

    Master-uppsats, Linköpings universitet/Institutionen för teknik och naturvetenskap

    Författare :Alfred Rundquist; [2023]
    Nyckelord :iridescence; color; halftoning; screen; printing; ink; special; effect; pigments; media technology; simulation; iriserande; färg; rastrering; metod; screentryck; silkscreentryck; raster; färgreproduktion; simulering;

    Sammanfattning : Iridescence is the property that makes colors vary by angle of observation. Technology has made it possible to print with ink that has this anisotropic property. The ink that is used contains microparticles and therefore only specific printing methods can be used, for example screen printing. LÄS MER

  3. 2. Optimal Q-Space Sampling Scheme : Using Gaussian Process Regression and Mutual Information

    Kandidat-uppsats, Uppsala universitet/Avdelningen för systemteknik

    Författare :Ture Hassler; Jonathan Berntsson; [2022]
    Nyckelord :AI; Machine learning; Gaussian process; Gaussian process regression; MRI; dMRI; q-space; sampling; statistics; information theory; mutual information; entropy; pytorch; gpytorch;

    Sammanfattning : Diffusion spectrum imaging is a type of diffusion magnetic resonance imaging, capable of capturing very complex tissue structures, but requiring a very large amount of samples in q-space and therefore time.  The purpose of this project was to create and evaluate a new sampling scheme in q-space for diffusion MRI, trying to recreate the ensemble averaged propagator (EAP) with fewer samples without significant loss of quality. LÄS MER

  4. 3. Raytracing in Channel Model Development

    Master-uppsats, Karlstads universitet

    Författare :Andreas Rogne; [2022]
    Nyckelord :;

    Sammanfattning : The fifth generation of mobile internet is upon us, but still, there is work to do before the new technology is fully utilized. The new generation of cellular network promises frequencies ranging from the sub – 6 GHz to 39 GHz, the latter being in the mmWave spectrum. LÄS MER

  5. 4. Doping Layers in Quantum Cascade Lasers: A study in doping density, position and migration effects

    Master-uppsats, Lunds universitet/Matematisk fysik

    Författare :Josefin Reftlér; [2022]
    Nyckelord :Physics and Astronomy;

    Sammanfattning : Quantum Cascade Lasers (QCLs) consist of several semiconductor materi- als sandwiched together. The QCL achieves stimulated emission in the mid-IR (m-IR) to the THz region of the electromagnetic spectrum by inter-subband transitions. These parts of the electromagnetic spectrum are hard to lase in with conventional means. LÄS MER

  7. 5. Key Success Factors for End-User Adoption of 5G Technology Within a Low-Middle Income Country : A case study in Malaysia

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Markus Olofsgård; Philip Göransson; [2022]
    Nyckelord :5G; Industry 4.0; Adoption of technology; Adoption of broadband use; Diffusion of technology; Multi-level perspective; Low-middle income countries; Barriers and enabling factors; 5G; Industri 4.0; Anammande av teknik; Anammande av bredbandsteknik; Spridning av teknik; Multinivå-perspektiv; Låg- och medelinkomstländer; Barriärer och möjliggörande faktorer.;

    Sammanfattning : Recent breakthroughs within technology and data science have initiated talks of a new emerging industrial revolution, being the fourth of its kind. This revolution, titled as Industry 4. LÄS MER