Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Magnetic field distribution"”.
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Recovery of high-resolution magnetic field distribution inside the brain from limited MRI data using machine learning prior
High-resolution field maps in brain magnetic resonance imaging (MRI) scans provide the field distribution information inside the brain which is essential in reconstructing high-quality MR images with no artifacts and distortions. These high-quality images are highly desired in clinical …
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Model-based reconstruction for correcting magnetic susceptibility-induced artifacts in magnetic resonance imaging
While magnetic susceptibility is an essential contrast mechanism in magnetic resonance imaging (MRI), it also causes significant disruptions to the imaging process. Strong differences in magnetic susceptibility exist at the air and tissue interfaces in the brain, resulting in a magnetic field …
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A two dimensional model of magnetic field assisted assembly
A simplified model to simulate the magnetic field distribution for applications in magnetic field assisted assembly of semiconductor device structures, using commercial software (Vizimag), has been implemented. Solenoids have been utilized to serve as electromagnets that are responsible for the …
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Modelling and design of high-speed, long-lifetime and large-force electromagnetic actuators based on magnetic shape memory alloys
… large-force and long life-time electromagnetic actuators based on Magnetic Shape Memory (MSM) alloys. These relatively new “smart” alloys that change shape in magnetic fields possess very promising properties such as large strain, considerable output stress and potentially very long …
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A Critical Assessment of the Finite Element Method for Calculating Magnetic Fields in Electron Optics
… is concerned with the determination of the magnetic field distribution in magnetic electron lenses by means of the finite element method. A critical comparison is made of the available finite element computer programs. Necessary modifications have been made in certain programs, useful …
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Spectroscopic Measurements of Magnetic Field and Electron Density on Wire Array and Laser Plasmas
Magnetic field and electron density distributions within plasmas are crucial parameters in the study of high energy density laboratory plasmas. These measurements are challenging because often the magnetic fields undergo significant spatial and temporal fluctuations. Of the few measurement …
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Modeling and design of near-field antennas with periodic structures
… are modelled and adopted in the design of near-field antennas. First, the discontinuous Galerkin time-domain (DGTD) method is applied to model the scattering from periodic structures. The modelling of dispersive media is incorporated into a three-dimensional DGTD scheme, which is capable of …
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Electromagnetic tracking and steering for catheter navigation
This thesis explores the use of electromagnetics for both steering and tracking of medical instruments in minimally invasive surgeries. The end application is virtual navigation of the lung for biopsy of early stage cancer nodules. Navigation to the peripheral regions of the lung is difficult due …
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Electromagnetic-thermal Characteristics of Conductor on Round Core (CORC) Cables
… showing high current density in a high magnetic field, are already commercially available. As a cabling concept, Conductor on Round Core (CORC) cables consisting of a cylindrical former and multiple helically bent HTS-CCs, exhibit more significant current-carrying capacity while reducing …