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Dissertations / Theses on the topic 'Magnetic dynamic'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Gay, Sebastien Emmanuel. "Contactless magnetic brake for automotive applications." [College Station, Tex. : Texas A&M University, 2005. http://hdl.handle.net/1969.1/ETD-TAMU-1005.

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2

Vannette, Matthew Dano. "Dynamic magnetic susceptibility of systems with long-range magnetic order." [Ames, Iowa : Iowa State University], 2009.

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3

Moore, Thomas Arthur. "Dynamic hysteresis in thin magnetic films." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.620716.

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4

Szabó, Botond K. "Dynamic magnetic resonance imaging of the breast : /." Stockholm, 2004. http://diss.kib.ki.se/2004/91-7140-089-3/.

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5

Keys, Peter Hugh. "The dynamic properties of magnetic bright points." Thesis, Queen's University Belfast, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.602350.

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This thesis presents results concerning the properties of magnetic bright points(MBPs) in the solar atmosphere in different environments obtained using high spatial and temporal resolution observations and numerical solutions. The first study presented looks at the properties of photospheric MBPs in a quiet sun region at disk centre.

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6

de, Pasquale Francesco. "Analysis of dynamic magnetic resonance breast images." Thesis, University of Plymouth, 2004. http://hdl.handle.net/10026.1/2351.

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Dynamic Magnetic Resonance Imaging is a non-invasive technique that provides an image sequence based on dynamic information for locating lesions and investigating their structures. In this thesis we develop new methodology for analysing dynamic Magnetic Resonance image sequences of the breast. This methodology comprises an image restoration step that reduces random distortions affecting the data and an image classification step that identifies normal, benign or malignant tumoral tissues. In the first part of this thesis we present a non-parametric and a parametric approach for image restoratio

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7

Berry, Robert D. "Dynamic viscoelastic properties of advanced magnetic tapes." Scholarly Commons, 2012. https://scholarlycommons.pacific.edu/uop_etds/807.

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The purpose of this thesis is to analyze the viscoelastic properties of current large digital storage magnetic tape materials, using a custom ultra-low frequency dynamic mechanical analyzer (DMA). Through the correlated effects of frequency and temperature, the long term mechanical properties of the magnetic tape can be simulated and used for predictive analysis of long term storage quality and stability of each individual tape given applicable storage conditions. Two magnetic tapes of primary interest reviewed in this paper are both current leading high capacity tapes, one having a poly(ethyl

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8

Soriano, Jorge Miguel. "Static and dynamic X-ray resonant magnetic scattering studies on magnetic domains." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2005. http://dare.uva.nl/document/79509.

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9

Testud, Frederik [Verfasser], and Jürgen [Akademischer Betreuer] Hennig. "Dynamic magnetic field estimation for magnetic resonance imaging = Dynamische Magnetfeldmessung für Magnetresonanztomographie." Freiburg : Universität, 2013. http://d-nb.info/1123478422/34.

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10

Miguel, López María del Carmen. "Dynamic Properties of Magnetic Colloidal Particles and Holes." Doctoral thesis, Universitat de Barcelona, 1985. http://hdl.handle.net/10803/667638.

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Our main goal is to study certain aspects of the dynamics of fluids with magnetic particles in suspension, based on their promising practical applications as new materials as welI as on its fundamental scientific interest. In the introduction we brief the reader on the most essential properties of the system. We have characterized the monodomain magnetic particles and the time scales inherent to magnetic fluids. Having introduced the rotational diffusion equation as the most convenient tool to take into account the different mechanism inftuencing the dynamics of the particles, we have also

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11

Burdumy, Michael [Verfasser], Jan G. [Akademischer Betreuer] Korvink, and Jürgen [Akademischer Betreuer] Hennig. "Dynamic imaging of singers using magnetic resonance tomography." Freiburg : Universität, 2016. http://d-nb.info/1137466170/34.

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12

Wang, Xiaobin. "Studies on dynamic thermal reversal and transition jitter in magnetic materials /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3099914.

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13

Wilmot-Smith, Antonia. "The origin and dynamic interaction of solar magnetic fields." Thesis, St Andrews, 2008. http://hdl.handle.net/10023/417.

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14

Van, Lierop Johan. "Separation of static and dynamic disorder in magnetic materials." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=37853.

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Conventional transmission Mossbauer, selective excitation double Mossbauer (SEDM), and zero-field muon spin relaxation (ZF-muSR) spectroscopy were used to identify static and dynamic magnetic disorder. With the construction of an efficient SEDM spectrometer, a consistent description of static magnetic disorder in an amorphous alloy (a-Fe80B 20) was developed using transmission Mossbauer and SEDM spectroscopy. Both methods measure the effects of the random static distribution of local magnetic environments around the Mossbauer nuclei. Magnetic fine particle systems (Fe3O4 ferrofluids, polysacch

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15

Margiolaki, Irene. "Structural, magnetic and dynamic properties of fullerene based materials." Thesis, University of Sussex, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288785.

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16

Cassidy, C. "Dynamic, in situ magneto-optical studies of magnetic multilayers." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419560.

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17

Mohammad, A. S. Mohammad. "Dynamic measurements of speech articulators using magnetic resonance imaging." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297609.

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18

Khanal, Shankar. "Study of Static and Dynamic Properties of Magnetic Nanostructures." ScholarWorks@UNO, 2017. http://scholarworks.uno.edu/td/2382.

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Magnetic materials are one of the most interesting and promising class of materials for technological applications [1]. Among them, patterned ferromagnetic systems have an important role especially in the prospect of high density data storage [2], domain wall logic devices [3] and magnetic memory [4, 5]. Coupled systems of ferromagnetic and antiferromagnetic materials have been implemented to design sensors such as giant magnetoresistance (GMR) [6-8] and tunnel magnetoresistance (TMR) [9, 10]. Ferromagnetic nanoparticles have been used for the drug targeting, cancer therapy, MRI and many more

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19

Sümbül, Uygar. "Improved time series reconstruction for dynamic magnetic resonance imaging /." May be available electronically:, 2009. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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20

Williams, Benjamin Matthew. "The dynamic topology of the solar corona : mapping the Sun's three dimensional magnetic skeleton." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/14637.

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Observations of the surface of the Sun reveal multi-scaled, mixed magnetic features that carpet the entire solar surface. Not surprisingly, the global magnetic fields extrapolated from these observations are highly complex. This thesis explores the topology of the Sun's global coronal magnetic fields. The magnetic skeleton of a magnetic field provides us with a way of examining the magnetic field and quantifying its complexity. Using specialised codes to find the magnetic skeletons which were written during the course of this work, we first examine potential field extrapolations of the global

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21

Donát, Martin. "Komplexní analýza modálních vlastností elektrických strojů točivých." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-234347.

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This dissertation thesis deals with the computational modelling of the dynamic response of the rotating electrical machine structure on the application of the magnetic forces. Apart from the dynamic response of the ideal symmetrical machine, the influence of the air gap eccentricity on the dynamics response is studied in this work. A basic type of the air gap eccentricity, which is caused by eccentric mounting of the rotor pack on the shaft of the rotor, is considered. The calculations the dependence of the magnetic forces on the time and a misalignment of the rotor pack are performed as first

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22

Buckley, David Lorimer. "Modelling contrast uptake by neoplasms using dynamic magnetic resonance imaging." Thesis, University of Hull, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318385.

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23

Ronan, G. A. "The fabrication and dynamic characteristics of novel magnetic bubble devices." Thesis, University of Manchester, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370961.

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24

Zananiri, F. V. "The quantification of dynamic processes measured by magnetic resonance imaging." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246264.

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25

Rummel, Nicholas J. "Dynamic mechanical analysis of magnetic tapes at ultra-low frequencies." Scholarly Commons, 2011. https://scholarlycommons.pacific.edu/uop_etds/773.

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The purpose of this thesis is to investigate the correlated effects of temperature and frequency on the viscoelastic behavior of magnetic tapes, using a custom, ultra-low frequency, dynamic mechanical analyzer. The long-term mechanical and thermal properties of magnetic tapes can be simulated using high temperature and low frequency dynamic mechanical analysis (DMA) experiments. These experiments investigate how the viscoelastic characteristics of tape samples influence the extent to which the tape deforms. The experiments and analyses implemented in this paper examine the influence of the mol

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26

Hall, Dennis A. (Dennis Alan) 1970. "Dynamic nuclear polarization of biological systems at high magnetic fields." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9635.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1998.<br>Includes bibliographical references.<br>Dynamic nuclear polarization methods were studied at high magnetic field strength and were applied to improve the sensitivity of the nuclear magnetic resonance spectroscopy of biological solids. Studies of the dynamics of electron-nuclear polarization transfer via the solid effect and thermal mixing at 5 Tesla are described for two systems: the free radical BDPA doped into polystyrene and the nitroxide TEMPO in a water:glycerol matrix. A model for thermal mixing at high m

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27

Burdumy, Michael [Verfasser]. "Dynamic Imaging of Singers Using Magnetic Resonance Tomography / Michael Burdumy." München : Verlag Dr. Hut, 2016. http://d-nb.info/1115549804/34.

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28

Stockem, Irina [Verfasser]. "Modeling and simulation of the static and dynamic magnetic properties of nanostructured magnetic multilayer systems / Irina Stockem." Bielefeld : Universitätsbibliothek Bielefeld, 2016. http://d-nb.info/1105645479/34.

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29

McDougall, Mary Preston. "Single echo acquisition magnetic resonance imaging." Texas A&M University, 2004. http://hdl.handle.net/1969.1/3324.

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The dramatic improvement in magnetic resonance imaging (MRI) scan time over the past fifteen years through gradient-based methods that sample k-space more efficiently and quickly cannot be sustained, as thresholds regarding hardware and safety limitations are already being approached. Parallel imaging methods (using multiple receiver coils to partially encode k-space) have offered some relief in the efforts and are rapidly becoming the focus of current endeavors to decrease scan time. Ideally, for some applications, phase encoding would be eliminated completely, replaced with array coil encod

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30

Schmiel, David R. "Effects of variations in controller gains on the dynamics of magnetic bearings." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11182008-063516/.

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31

Drew, Philip. "The clinical application of dynamic magnetic resonance imaging of the breast." Thesis, University of Hull, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322450.

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32

MEHRPARVAR, MAHSHID. "Control Systems for Experimental Magnetic Materials Characterization Using Dynamic Preisach Models." Thesis, KTH, Elektrisk energiomvandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160704.

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The eciency of electrical machines is of major concern due to their widespread usage and the globally increasing awareness of energy consumption issues. Iron losses have a signicant impact on the total and thus researchers and manufacturers of electrical machines are developing dierent strategies in order to reduce them. The iron losses are highly dependent on the magnetic material that is used and thus it is necessary to identify its relevant characteristics. In this work, the development of a control system for inducing a pure sinusoidal magnetic ux density in the magnetic material is descri

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33

Sandacci, Serghei. "Dynamic magnetic effects in amorphous microwires for sensors and coding applications." Thesis, University of Plymouth, 2004. http://hdl.handle.net/10026.1/2713.

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This work is devoted to the study of the dynamic properties of magnetic amorphous wires, in particular, glass-coated microwires, which have small diameters (5-30 microns), outstanding soft magnetic behaviour with a high permeability and low coercivity, yet, possess a well-defined magnetic structure. First part of my PhD research has been devoted to the investigation of a bi-stable magnetisation reversal in glass-coated amorphous microwires. In contrast to traditional approaches, where characteristics of the magnetisation reversal are analysed as a consequence of the eddy current effect, l have

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34

McCallum, Duncan C. (Duncan Craig). "Dynamic modelling and control of a magnetic bearing-suspended rotor system." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14554.

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35

Nolan, Michael John. "Studies of dynamic processes in articular joints using magnetic resonance imaging." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624842.

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36

Kiani, Saeed. "Blind source separation in dynamic contrast enhanced magnetic resonance imaging renography." Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616917.

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Dynamic contrast~enhanced magnetic resonance imaging (DCE-MRI) renography is a desirable kidney assessment methodology owing to the lack of ionizing radiation in MRI and its capability of producing high-resolution anatomical image data as well as physiological data. DCE-MRI renography emerged with the view to provide a minimally invasive framework to quickly and accurately assess kidney function, for example, to measure glomerular filtration rate (GFR). However, despite considerable developments, it is not yet considered a robust technique of renal assessment. This is due to a number of confou

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37

FENG, I. JUNG. "Dynamic Adjustment of Stimuli in Real-Time Functional Magnetic Resonance Imaging." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1373025879.

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38

Lemesh, Ivan. "Static and dynamic properties of magnetic Skyrmions in engineered multilayer films." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122179.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 205-219).<br>Magnetic textures known as skyrmions promise new breakthroughs in memory, logic, and neuromorphic applications. Skyrmions have been found in a variety of material systems, yet there existed no experimental evidence of a material that could simultaneously host them at room temperature and also allow for their reproducible current-induced nucleation and motion. One main goal of this thesis

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39

Miedzinska, K. M. E. (Katarzyna Malgorzata Ewa) Carleton University Dissertation Chemistry. "A dynamic ensemble model for intensity parameters in chiroelectronic spectroscopy." Ottawa, 1992.

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40

Norén, Bengt. "Non-Invasive Assessment of Liver Fibrosis with 31P-Magnetic Resonance Spectroscopy and Dynamic Contrast Enhanced Magnetic Resonance Imaging." Doctoral thesis, Linköpings universitet, Medicinsk radiologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-90154.

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The present study aims at demonstrating phosphorus metabolite concentration changes and alterations in uptake/excretion of a hepatocyte specific contrast agent in patients with diffuse - or suspected diffuse - liver disease by applying two non-invasive quantitative MR techniques and to compare the results with histo-pathological findings, with focus on liver fibrosis. In the first study phosphorus-31 MR spectroscopy using slice selection (DRESS) was implemented. Patients with histopathologically proven diffuse liver disease (n = 9) and healthy individuals (n = 12) were examined. The patients h

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41

GYAMFI, Jerryman. "From The Holstein-Primakoff Transformation to Semiclassical Quantum Markovian Master Equations – with Applications in Magnetic Resonance." Doctoral thesis, Scuola Normale Superiore, 2020. http://hdl.handle.net/11384/94193.

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[from the Preface]: The present dissertation concerns some theoretical and computational aspects of multispin dynamics, mainly, in relation to magnetic resonance. ... The present dissertation is divided into five parts. Part I provides a quick overview of some fundamental concepts in quantum mechanics. The HP transformation is extensively discussed in Part II. Concepts from the theory of open quantum systems like completely positive maps, universal dynamical maps, quantum dynamical semigroups and quantum Markovian master equations are discussed in Part III. This is where we also refine,

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42

Ćasić, Nebojša [Verfasser], and Thomas [Akademischer Betreuer] Fischer. "Dynamic Self-Assembly of Magnetic Colloidal Particles / Nebojša Ćasić. Betreuer: Thomas Fischer." Bayreuth : Universität Bayreuth, 2013. http://d-nb.info/1059353113/34.

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43

Biglands, John David. "Quanitifying myocardial blood flow using dynamic contrast enhanced cardiac magnetic resonance imaging." Thesis, University of Leeds, 2012. http://etheses.whiterose.ac.uk/3756/.

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The assessment of myocardial perfusion using dynamic contrast enhanced magnetic resonance imaging (DCE-MRI) is a powerful tool for diagnosing myocardial ischaemia due to coronary heart disease, which affects nearly 2.7 million people in the UK and for which there is an effective treatment. Although visual analysis of DCE-MRI data performs well diagnostically, a quantitative estimate of myocardial blood flow (MBF) makes the diagnosis objective and could increase diagnostic performance. Obtaining MBF estimates from DCE-MRI data is a multi-step process requiring: - the localisation of the myocard

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44

Gallagher, F. A. "Molecular imaging of tumours using dynamic nuclear polarization and magnetic resonance imaging." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599277.

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Dynamic Nuclear Polarization (DNP) is an emerging technique for increasing the sensitivity of Magnetic Resonance Imaging (MRI) in the liquid state. It has recently been applied to <i>in vivo </i>imaging of carbon metabolism: the spatial distribution of an injected hyperpolarized <sup>13</sup>C-labelled molecule can be imaged in an intact living system, as well as the metabolites formed from it. This work demonstrates how this technique could have potential applications in medicine. <sup>13</sup>C-labelled bicarbonate was hyperpolarized and the production of hyperpolarized carbon dioxide has be

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45

Johnson, Anthony. "The long-term dynamic influence of human activity on topsoil magnetic susceptibility." Thesis, University of Oxford, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617598.

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Magnetic survey has become increasingly important in locating and characterising sites of archaeological potential. Magnetometry and topsoil magnetic susceptibility are the principal methods employed. In recent years advances in the design of magnetometers have made their use almost universal, somewhat to the detriment of magnetic susceptibility survey. This is especially true when the efficacy of various geophysical methods in locating sites of archaeological potential is compared. Such direct comparisons are, however, open to serious question. When sealed below the soil archaeological featur

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46

Büttner, Felix [Verfasser]. "Topological mass of magnetic Skyrmions probed by ultrafast dynamic imaging / Felix Büttner." Mainz : Universitätsbibliothek Mainz, 2013. http://d-nb.info/1046249096/34.

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47

Ahearn, Trevor Sean. "The accuracy and robustness of dynamic contrast enhanced magnetic resonance imaging methodology." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275080.

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The neovasculature formed as a lesion outgrows the local blood supply is incompletely formed. This makes these vessels prone to leak macromolecular contrast agents, and it is this property of soft tissue lesions which allows the accumulation of a contrast agent within a lesion and hence alters the magnetic resonance (MR) signal. Since it is thought that the amount, and rate, of signal enhancement due to the accumulation of a contrast agent is an important aid in diagnosis, the accuracy and reliability of the quantitative phase of the image analysis are important issues in need of evaluation.

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48

Liang, Jiachao. "Dynamic Contrast Enhanced Magnetic Resonance Imaging at High and Ultra-high Fields." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1228327344.

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49

Sheffield, Matthew E. "Developing New Techniques for Investigating Static and Dynamic Magnetic Degrees of Freedom." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu153304892098996.

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50

Brookes, Jason A. "Quantitation of contrast enhancement in dynamic magnetic resonance imaging of the breast." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU090114.

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This thesis explores issues relating to the quantitation of both signal enhancement and contrast agent uptake, along with problems associated with such quantitation, with the aim of improving the specificity of dynamic, contrast enhanced breast MRI. A variable flip angle technique for measuring T1 in vivo was implemented using 2D and 3D FLASH sequences, in order to monitor the differential relaxation rate following injection of contrast agent. Experiments (with phantom objects) investigating sources of error in these techniques found that (i) the rf transmit power calibration automatically per

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