Sökning: "dipole"

Visar resultat 21 - 25 av 250 avhandlingar innehållade ordet dipole.

  1. 21. Nuclear spin interactions and coherent control in rare-earth-ion-doped crystals for quantum computing

    Författare :Hafsa Syed; NanoLund: Centre for Nanoscience; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; rare-earth-ion-doped crystals; nuclear spins; magnetic dipole-dipole interactions; flip-flop interactions; quantum computing; high-fidelity;

    Sammanfattning : This thesis work concerns studies of two rare-earth-ions, praseodymium (Pr3+) and europium (Eu3+), doped into a yttrium orthosilicate (Y2SiO5) crystal for applications in quantum computing. The nuclear spin levels of these ions can have very long coherence times, up to several hours. LÄS MER

  3. 22. Non-invasive Functional Neuroimaging for Localizing Epileptic Brain Activity

    Författare :Yazdan Shirvany; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mathematical Dipole; Finite Element Method; Source localization; Structural Magnetic Resonance Imaging; Forward Problem; Inverse Problem; Particle Swarm Optimization; Non-invasive EEG; Somatosensory Evoked Potentials; Epileptic Spike; Functional Neuroimaging;

    Sammanfattning : Surgical therapy has become an important therapeutic alternative for patients with medically intractable epilepsy. Correct and anatomically precise localization of the epileptic focus, preferably with non-invasive methods, is the main goal of the pre-surgical epilepsy diagnosis to decide if resection of brain tissue is possible. LÄS MER

  4. 23. A Discrete Dipole Approximation Forward Solver for Microwave Breast Imaging

    Författare :Samar Hosseinzadegan; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; microwave imaging; forward problem; breast cancer; tomography; computation time.;

    Sammanfattning : Breast cancer has the highest incidence rate of cancers in women worldwide. Early detection results in a higher survival rate. Drawbacks in conventional imaging modalities, including painful exams, have limited periodic breast screening. LÄS MER

  5. 24. Theoretical and Biochemical : Advancing Protein Structure Investigations with Complementing Computations

    Författare :Maxim N. Brodmerkel; Erik G. Marklund; Carl Caleman; Charlotte Uetrecht; Helmut Grubmüller; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular dynamics simulation; Protein structure; Structural biology; Protein hydration; Electric dipole; Collision Induced Unfolding;

    Sammanfattning : Life as we know it today would not exist without proteins. The functions of proteins for us and other organisms are linked to their three-dimensional structures. As such, protein structure investigations are a crucial contribution for understanding proteins and the molecular basis of life. LÄS MER

  7. 25. Hydrogen in nominally anhydrous silicate minerals : Quantification methods, incorporation mechanisms and geological applications

    Författare :Franz A. Weis; Henrik Skogby; Peter Lazor; Jannick Ingrin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NAMs; clinopyroxene; hydrogen; hydrothermal pressure; magmatic water content; zoisite; OH-dipole; Raman spectroscopy; FTIR; luminescence; proton-proton scattering;

    Sammanfattning : The aim of this thesis is to increase our knowledge and understanding of trace water concentrations in nominally anhydrous minerals (NAMs). Special focus is put on the de- and rehydration mechanisms of clinopyroxene crystals in volcanic systems, how these minerals can be used to investigate the volatile content of mantle rocks and melts on both Earth and other planetary bodies (e. LÄS MER