Sökning: "helical"

Visar resultat 11 - 15 av 48 uppsatser innehållade ordet helical.

  1. 11. Implementation of the Weighted Filtered Backprojection Algorithm in the Dual-Energy Iterative Algorithm DIRA-3D

    Master-uppsats, Linköpings universitet/Institutionen för systemteknik

    Författare :Markus Tuvesson; [2021]
    Nyckelord :wFBP; weighted Filtered Backprojection; DIRA-3D;

    Sammanfattning : DIRA-3D is an iterative model-based reconstruction method for dual-energy helical CT whose goal is to determine the material composition of the patient from accurate linear attenuation coefficients (LACs). Possible applications are, for example, to aid in calculations of radiation transport and dose calculations in brachytherapy with low energy photons, and in proton therapy. LÄS MER

  3. 12. Investigation of possible improvements of the stability of bispecific ADAPT proteins

    Master-uppsats, KTH/Proteinvetenskap

    Författare :Ella Eriksson; [2021]
    Nyckelord :Protein purification; Affinity chromatography; ABD-derived domain; ADAPT protein; simultan binding;

    Sammanfattning : The aim of the project was to identify positions and amino acids that contribute to improved structure and stability of bispecific ADAPT proteins. During the 20 weeks project period, different amino acid substitutions were analysed to evaluate the effect on the three-helical structure and stability of bispecific ADAPTs targeting human serum albumin (HSA) and tumor necrosis factor α (TNFα). LÄS MER

  4. 13. Gap properties of helical edge states in two-dimensional topological insulators with time-dependent magnetic impurities

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Simon Wozny; [2020]
    Nyckelord :topological insulators; edge states; impurities; density of states; Green s function; Floquet; Physics and Astronomy;

    Sammanfattning : The quantum mechanical equivalent of the classical Hall effect can lead to interesting results in solid state physics. A similar effect, that has received attention in recent years, occurs when large spin-orbit coupling is present in a material, the so-called quantum-spin Hall effect. LÄS MER

  5. 14. Formulation of Model Problem for Chirality Induced Spin Selectivity Effect

    Kandidat-uppsats, Uppsala universitet/Materialteori

    Författare :Henrik Bruce; [2020]
    Nyckelord :Chirality; Spin selectivity; CISS;

    Sammanfattning : Spin dependent electron transport in chiral molecules, the so-called chirality induced spin selectivity (CISS) effect, have attracted much attention over the past few years. Experimentally the spin polarization has been detected, and there is a theoretical consensus on the necessity of both spin-orbit coupling and geometrical helicity in order to get a non-vanishing spin polarization. LÄS MER

  7. 15. Experimental validation of a periodic heat transfer CFD model of a vertical shell and tube heat exchanger

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

    Författare :Patrik Bengtsson; Dilip Kumar Vellore Saikumar; [2019]
    Nyckelord :;

    Sammanfattning : Flow obstructions are used as a passive design element in heat exchangers to enhance heattransfer. Further, a change in flow structure can also have a positive effect on the heat transfer. Avertical shell and tube heat exchanger, used to recover heat in the greywater stream, isinvestigated in this study. LÄS MER