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Dissertations / Theses on the topic 'Static Magnetic Fields'

Author: Grafiati

Published: 4 June 2021

Last updated: 27 July 2025

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1

Cupitt, Philip Leslie. "Static magnetic fields and nerve function." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/1717/.

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2

Platt, Tyson Ladig. "The effects of static magnetic fields on directionality in humans." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Spring%20Dissertations/PLATT_TYSON_9.pdf.

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3

Mach, Batlle Rosa. "Controlling static magnetic fields with positive and negative permeability metamaterials." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/669857.

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Magnetism is present in our daily life – it is found at the basis of technologies such as electric generators and transformers, data storage systems, sensors, and biomedical equipment – and it is usually controlled by ferromagnetic materials. Recently, the introduction of magnetic metamaterials and the transformation optics technique has enabled the development of a wide range of devices for controlling magnetic fields, offering possibilities beyond those of conventional magnetic materials. In this thesis, we apply these concepts to propose different strategies for controlling static magnetic

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4

Fuentes, Fernández Jorge. "MHD evolution of magnetic null points to static equilibria." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1897.

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In magnetised plasmas, magnetic reconnection is the process of magnetic field merging and recombination through which considerable amounts of magnetic energy may be converted into other forms of energy. Reconnection is a key mechanism for solar flares and coronal mass ejections in the solar atmosphere, it is believed to be an important source of heating of the solar corona, and it plays a major role in the acceleration of particles in the Earth's magnetotail. For reconnection to occur, the magnetic field must, in localised regions, be able to diffuse through the plasma. Ideal locations for dif

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5

Watring, Dale A. (Dale Allen). "Effects of static axial magnetic fields on directional solidification of HgCdTe." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/33820.

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6

Atwal, Virinder S. "An experimental study of static magnetic field effect on free diffusion of saccharides in aqueous solution." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30560.

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The purpose of this work was to investigate experimentally the effects of an externally applied magnetic field on free diffusion of saccharides in aqueous solution. The diffusion coefficients of simple saccharides (deoxyribose, D(-)ribose, D(+)xylose, D-glucose, D-galactose, D(-)fructose, lactose, sucrose, maltose, raffinose) diffusing through a 0.4 micron pore diameter Nuclepore membrane were measured in applied magnetic field strengths ranging from zero to 1.1 T. The applied magnetic field strength was the only variable in these experiments. The initial saccharide concentration difference ac

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7

Lazarakis, Peter. "Effects of a static magnetic field on biological samples." School of Engineering Physics - Faculty of Engineering, 2009. http://ro.uow.edu.au/theses/3033.

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FTIR spectroscopy uses the absorbed light in an IR beam to determine the composition of a sample. This study was done using FTIR techniques to determine the damage done or alterations caused when a magnetic field was applied to a biological sample (cell cultures).The effects of magnetic fields on biological samples is an area that is not very well understood with little reliable data available.Various experiments investigating the influence of a magnetic field on cell growth, the chemical bonds in cells and the effects during irradiation were performed. Consistently it was seen that the larges

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8

Isaacs, Ian J. "The effects of pulsed static and oscillating magnetic fields on rat pineal serotonin N-acetyltransferase activity." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/26990.

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Concerns about the possible hazardous effects of electromagnetic fields (EMF ' s) has resulted in attempts to address this issue. Several authors have shown that EMF exposure affects biological systems and more specifically the pineal enzyme, serotonin N-acetyltransferase (SNAT), inhibiting the enzyme and thus melatonin production. The enzyme assay required, for performing this type of work is crucial, as the natural decay of the enzyme could bias experimental results. An assay for measuring SNAT activity was assessed and then improved. The Ca²⁺ ion chelator, EGTA (2mM), preserved enzyme activ

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9

López, Ochoa Alexander Richard. "Investigations and simulations of magneto elastomer materials (MSE) influenced by static magnetic fields for soft robotics applications." Master's thesis, Pontificia Universidad Católica del Perú, 2019. http://hdl.handle.net/20.500.12404/15457.

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Magneto-sensitive Elastomere sind Verbundwerkstoffe, die hauptsächlich aus einer Elastomermatrix bestehen, in der magnetischen Partikeln dispergiert sind. Ein ins magnetosensitive Elastomer eingreifende Magnetfeld bewirkt Änderungen der Eigenschaften dieses Materials. Diese Qualität macht die MSE zu einer Option mit hohem Potenzial für Soft Robotics- Anwendungen. Für die Realisierung dieser Masterarbeit wurden MSE-Proben aus einer Elastomermatrix, Silikonöl und Carbonyleisenpartikeln hergestellt. Tests wurden durchgeführt, um Verbesserungen zu entwickeln, die sich auf Soft-Robot- Anwendungen

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10

Maldonado, Samuel. "Short Term Memory of Magnetic Resonance Imaging Technologists." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2366.

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This study examined the short term memory (STM) difference of magnetic resonance imaging (MRI) technologists versus non-MRI technologists. Human and animal studies have indicated that residual magnetic fields have caused changes within the cerebral structure. Research on residual magnetic fields and their effect on STM is still at its infancy. A quasi-experimental design was used to determine if any significant difference existed between the STM of MRI technologists (n = x) and a control population sample (n = x). The STM of both groups was assessed with the use of the Rivermead Behavioural Me

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11

Rodericks, Michele Melanie. "The effect of applied and magnetic fields on the crystallisation of hydrocarbons." Thesis, Brunel University, 2003. http://bura.brunel.ac.uk/handle/2438/9219.

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This thesis provides a background on the effects of applied and magnetic fields on crystallisation, and summarises the analytical techniques employed for characterisation and analysis. The study of applied fields was carried out on the crystallisation of one main system-solid nonadecane. This was then studied further to establish the effects of a solvent and a mixed solid system on the crystallisation of nonadecane. The systems studied were the crystallisations of: static and dynamic nonadecane, static and dynamic nonadecane in heptane, static and dynamic nonadecane and heneicosane, static and

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12

Pooam, Marootpong. "The biological effects of applied magnetic fields on cryptochrome and response." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS062.

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Cryptochromes (cry) sont des flavoprotéines absorbant la lumière bleue conservées qui ont été liées à perception de stimuli électromagnétiques dans de nombreux organismes. Nous avons principalement étudié le mécanisme d'interaction entre les champs magnétiques (MF) et cry dans le cadre de la théorie des paires de radicaux. Nous avons étudié la réponse d'Arabidopsis cry-1 in vivo à MF. Les activités biologiques du cry ont été renforcées par MF. Les effets des MF ont pu être observés même si MF était donné exclusivement pendant les intervalles d'obscurité entre expositions à la lumière. Cette dé

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13

Dahmani, Chihebeddine [Verfasser], Thomas [Akademischer Betreuer] Weyh, and Rainer [Akademischer Betreuer] Burgkart. "Static and Dynamic Magnetic Fields for the Nanoparticle based Site-Directed Drug Delivery / Chihebeddine Dahmani. Universität der Bundeswehr München, Fakultät für Elektrotechnik und Informationstechnik. Gutachter: Thomas Weyh ; Rainer Burgkart. Betreuer: Thomas Weyh." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2014. http://d-nb.info/1054652546/34.

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Dahmani, Chihebeddine Verfasser], Thomas [Akademischer Betreuer] [Weyh, and Rainer [Akademischer Betreuer] Burgkart. "Static and Dynamic Magnetic Fields for the Nanoparticle based Site-Directed Drug Delivery / Chihebeddine Dahmani. Universität der Bundeswehr München, Fakultät für Elektrotechnik und Informationstechnik. Gutachter: Thomas Weyh ; Rainer Burgkart. Betreuer: Thomas Weyh." Neubiberg : Universitätsbibliothek der Universität der Bundeswehr München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:706-3592.

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15

Delmas, Antoine. "Définition, validation et mise en place d’un suivi de l’exposition au champ magnétique statique des travailleurs en IRM." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0074/document.

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L'Imagerie par Résonance Magnétique (IRM) est une modalité d'imagerie médicale reposant sur l'utilisation de champs électromagnétiques pour acquérir des images tomodensitométriques du corps humain. Bien qu'appartenant à la catégorie des rayonnements non-ionisants (RNI), des effets transitoires peuvent être ressentis par les personnels travaillant à proximité d'une IRM. Ces travailleurs sont dits exposés aux champs électromagnétiques, même si les différents comités d’experts s’accordent pour dire qu’aucun effet d’accumulation de dose ou d’effet à long terme n’a été trouvé. Ces effets à court te

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16

Zolj, Adnan. "Electrically Small Dipole Antenna Probe for Quasi-static Electric Field Measurements." Digital WPI, 2018. https://digitalcommons.wpi.edu/etd-theses/202.

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The thesis designs, constructs, and tests an electrically small dipole antenna probe for the measurement of electric field distributions induced by a transcranial magnetic stimulation (TMS) coil. Its unique features include high spatial resolution, large frequency band from 100 Hz to 300 kHz, efficient feedline isolation via a printed Dyson balun, and accurate mitigation of noise. Prior work in this area is thoroughly reviewed. The proposed probe design is realized in hardware; implementation details and design tradeoffs are described. Test data is presented for the measurement of a CW capacit

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17

Zhang, Chaojie. "Liquid metal flows drive by gas bubbles in a static magnetic field." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-26396.

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This thesis presents an experimental study which investigates the behaviour of gas bubbles rising in a liquid metal and the related bubble-driven flow under the influence of external DC magnetic fields. The experimental configuration considered here concerns a cylindrical container filled with the eutectic alloy GaInSn. Argon gas bubbles are injected through a single orifice located at the container bottom in the centre of the circular cross-section. A homogeneous magnetic field was generated by a Helmholtz configuration of a pair of water-cooled copper coils. The magnetic field has been impos

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18

Assländer, Jakob [Verfasser]. "Static Field Inhomogeneities in Magnetic Resonance Encephalography: Effects and Mitigation / Jakob Assländer." München : Verlag Dr. Hut, 2014. http://d-nb.info/1063221269/34.

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19

Zhang, Chaojie. "Liquid metal flows drive by gas bubbles in a static magnetic field." Doctoral thesis, Technische Universität Dresden, 2009. https://tud.qucosa.de/id/qucosa%3A25208.

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This thesis presents an experimental study which investigates the behaviour of gas bubbles rising in a liquid metal and the related bubble-driven flow under the influence of external DC magnetic fields. The experimental configuration considered here concerns a cylindrical container filled with the eutectic alloy GaInSn. Argon gas bubbles are injected through a single orifice located at the container bottom in the centre of the circular cross-section. A homogeneous magnetic field was generated by a Helmholtz configuration of a pair of water-cooled copper coils. The magnetic field has been impos

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20

LANZAROTTO, DAMIANO. "STATIC MAGNETIC FIELD IMPACT ON SEMICONDUCTOR DEVICES AND CENTRIFUGAL PUMPS AT ITER." Doctoral thesis, Università degli studi di Genova, 2021. http://hdl.handle.net/11567/1049208.

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An astounding number of components belonging to subsystems of different nature are installed in the ITER Tokamak building and all of those subjected to a constant or slowly variable magnetic field, an environmental condition unusual for other standard applications. Indeed, the magnetic field generated by ITER magnets can reach 70 mT in the crane hall of the Tokamak building, with a maximum derivative of 10 mT/s. Among these components, there are a few which are critical in the correct operation of the overall system and on which extremely few data are available regarding their interaction wi

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21

Sodickson, Aaron D. (Aaron David). "Spatial aspects of nuclear magnetic resonance spectroscopy : static and radio-frequency magnetic field gradients in principle and practice." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43353.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1997.<br>Includes bibliographical references (p. 131-132).<br>by Aaron David Sodickson.<br>Ph.D.

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22

Sun, Fei. "Transformation Optics for Controlling DC Magnetic Field." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-155326.

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Based on the form-invariant of Maxwell’s equations under coordinate transformations, we extend the theoryof transformation optics to transformation magneto-statics, which can design magnets through coordinatetransformations. Some novel DC magnetic field illusions created by magnets (e.g. rescaling magnets,cancelling magnets and overlapping magnets) are designed and verified by numerical simulations. Ourresearch will open a new door to designing magnets and controlling DC magnetic fields.<br><p>QC 20141105</p>

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23

Mohtasham, Parya. "Investigation of the effect of static magnetic field on production of industrially viable microbial products." Thesis, University of Westminster, 2017. https://westminsterresearch.westminster.ac.uk/item/q56v9/investigation-of-the-effect-of-static-magnetic-field-on-production-of-industrially-viable-microbial-products.

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Static magnetic field (MF) has a range of applications in pharmaceutical and biotechnology industries from medical devices and tissue engineering to wastewater treatment. The effect of MF on microbial cultures has been investigated by some researchers. However, the findings have been inconsistent. Extensive, systematic and comprehensive investigations are needed before potential application of MF in the industry. The aim of this research was to investigate the effect of MF on Gram-positive and Gram-negative bacterial strains for production of industrially viable products. To this end, an MF ge

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Gupta, Aditya. "SIGNAL PROCESSING OF AN ECG SIGNAL IN THE PRESENCE OF A STRONG STATIC MAGNETIC FIELD." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2206.

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This dissertation addresses the problem of elevation of the T wave of an electrocardiogram (ECG) signal in the magnetic resonance imaging (MRI). In the MRI, due to the strong static magnetic field the interaction of the blood flow with this strong magnetic field induces a voltage in the body. This voltage appears as a superimposition at the locus of the T wave of the ECG signal. This looses important information required by the doctors to interpret the ST segment of the ECG and detect diseases such as myocardial infarction. This dissertation aims at finding a solution to the problem of elevati

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25

Brada, Matej. "Graphene electronic devices in magnetic field." Thesis, Loughborough University, 2016. https://dspace.lboro.ac.uk/2134/21800.

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This thesis discusses the two dimensional allotrope of carbon known as graphene in presence of magnetic field, with special focus on edge states. The structure of graphene is described in detail and from the structure, two models are formed. The Dirac equation is a good description of graphene for large samples, far away from edges, where the boundaries can be ignored. However, it causes problems with most types of edge and hard wall approximation has to be implemented. The Dirac equation is described in detail and used to obtain an energy spectrum, wavefunction and density of states for graph

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Kuznetsov, V. N., A. A. Yanovska, A. S. Stanislavov, et al. "The Study of the Influence of Static Magnetic Field on Brushite Crystallization in the Presence of Magnesium." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35462.

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The paper describes the influence of the imposition of static magnetic field on brushite crystallization. Two different configurations of the magnetic field were used. The flasks with the precipitates were placed near the different poles. It was shown that changing the magnetic field configuration and positioning the samples in proximity to north or south poles can greatly affect their crystallinity and texture with most of them having the preferred orientation along the b-axis according to the X-Ray diffraction data. The imposition of the magnetic field also influences the microstrain ra

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27

Truong, Trong-Kha. "Susceptibility effects in ultra-high field magnetic resonance imaging of the human brain." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1093830567.

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28

Assländer, Jakob [Verfasser], and Jürgen [Akademischer Betreuer] Hennig. "Static field inhomogeneities in magnetic resonance encephalography : : effects and mitigation = Statische Magnetfeldinhomogenitäten in der Magnetresonanzencephalographie : Effekte und Mitigation." Freiburg : Universität, 2014. http://d-nb.info/1123481458/34.

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29

Edwards, Maria-Benedicta. "A novel method for detecting and recording movement and functional performance of cardiac valve prostheses exposed to the static magnetic field associated with magnetic resonance imaging." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24081.

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Aging and disease processes are known to compromise tissue strength and consequently increase the risk of harmful movement or detachment of a heart valve prosthesis in vivo when exposed to strong magnetic forces associated with magnetic resonance imaging (MRI). Research however, has failed to fully assess prosthetic valve movement or functional valve impedance in the MR environment. This study seeks to design and evaluate an MR compatible device which aims to detect and measure ex vivo, frequency, direction and magnitude of movements and leaflet function in vitro of nine prosthetic heart valve

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30

Sinatra, Francy L. "Understanding the Interaction Between Blood Flow and an Applied Magnetic Field." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3518.

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Hemodynamic monitoring is extremely important in the accurate measurement of vital parameters. Current methods are highly invasive or noncontinuous, and require direct access to the patient’s skin. This study intends to explore the modulated magnetic signature of blood method (MMSB) to attain blood flow information. This method uses an applied magnetic field to magnetize the iron in the red blood cells and measures the disturbance to the field with a magnetic sensor [1]. Exploration will be done by experimentally studying in-vitro, as well as simulating in COMSOL the alteration of magnetic fie

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31

Srikasem, Suthum. "Radiation from an aperture into an anisotropic plasma half-space." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1173761928.

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32

PENTELLA, MARIANO. "Characterization of magnetic materials at extreme ranges of field, temperature, and permeability." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2964790.

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33

Nys, Manon. "Schrödinger equations with an external magnetic field: Spectral problems and semiclassical states." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/216641.

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In this thesis, we study Schrödinger equations with an external magnetic field. In the first part, we are interested in an eigenvalue problem. We work in an open, bounded and simply connected domain in dimension two. We consider a magnetic potential singular at one point in the domain, and related to the magnetic field being a multiple of a Dirac delta. Those two objects are related to the Bohm-Aharonov effect, in which a charged particle is influenced by the presence of the magnetic potential although it remains in a region where the magnetic field is zero. We consider the Schrödinger magneti

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Palosaari, K. (Kari). "Quantitative and semiquantitative imaging techniques in detecting joint inflammation in patients with rheumatoid arthritis:phase-shift water-fat MRI method for fat suppression at 0.23 T, contrast-enhanced dynamic and static MRI, and quantitative ^99mTc-nanocolloid scintigraphy." Doctoral thesis, University of Oulu, 2008. http://urn.fi/urn:isbn:9789514288623.

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Abstract The purpose of this study was to evaluate the value of 0.23T low-field magnetic resonance imaging (MRI) and nanocolloid (NC) scintigraphy in assessing joint pathology associated with rheumatoid arthritis (RA). Fat suppression methods combined with contrast media enhancement aid in distinguishing enhancing inflamed tissue from the surrounding fat, especially in the imaging of arthritic joints. The feasibility and image quality of a phase-shift water-fat MRI method for fat suppression at low-field 0.23T open configuration MR scanner was evaluated. The technique was combined with contra

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Kawaguchi, Genta. "Systematic Control of the Electronic States in Halogen-Bonded π-d Hybrid Molecular Conductors with Employing Anion Mixing, High Pressure, and Strong Magnetic Field". 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/216168.

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36

Brito, Raquel Cardoso. "Alterações comportamentais induzidas por Pentilenotetrazol e por Alprazolam em animais submetidos ao labirinto em cruz elevado e estimulados por campo magnético estático." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/17/17152/tde-08062017-100440/.

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Os campos magnéticos estáticos interferem com o sistema nervoso central lesado, modificando a atividade de diferentes estruturas e recuperando o comportamento afetado pela lesão. Esse trabalho tem por objetivo investigar os efeitos dos polos magnéticos em ratos Wistar saudáveis e as repercussões comportamentais no Labirinto em Cruz Elevado (LCE) induzidas por pentilenotetrazol (PTZ) e por Alprazolam (ALP) sob o efeito da estimulação magnética. EXPERIMENTO I - Foram utilizados 107 ratos albinos Wistar, machos, pesando entre 270 - 300g. Após quatro dias da implantação de um magneto (3200 Gauss)

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Azambuja, Henrique Voltolini de. "Avaliação da aplicação de um campo magnético permanente sepultado em área de enxerto ósseo alógeno e dento-alveolar : estudo experimental em ratos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/12420.

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Proposição: O presente trabalho propõe o estudo histológico descritivo da aplicação de um campo magnético sepultado, estático e permanente em área de enxerto ósseo alógeno liofilizado e dento-alveolar associada a defeito cirúrgico em mandíbulas de ratos. Metodologia: estudo experimental in vivo, randomizado. Amostra foi composta por 21 ratos, da espécie Rattus novergicus albinus, linhagem Wistar, machos, divididos em três grupos, correspondendo aos tempos experimentais de sete, 21 e 45 dias. Foram realizadas ostectomias associadas a odontossecções, na face lateral externa do corpo mandibular e

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Gouveia, José Daniel Lago da Silva Neves. "Magnetic properties of quantum electronic systems with non-trivial geometries." Doctoral thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/21058.

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Doutoramento em Física<br>O modelo de Hubbard é um dos modelos mais simples para descrever o movimento e a interacção de electrões em sólidos. Tem sido largamente estudado pelas suas aplicações na descrição de condutores orgânicos e na procura de supercondutividade a cada vez mais altas temperaturas. O objectivo desta tese é contribuir para a melhor compreensão do comportamento do modelo de Hubbard a duas dimensões quando a geometria da rede é alterada, nomeadamente torcendo as condições de fronteira ou introduzindo frustração geométrica. Começa-se por fazer uma extensão do diagrama de

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Volf, Tomáš. "Analýza magnetického pole pomocí MKP a magnetické sondy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218786.

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The magnetic field analysis by MKP and magnetic probe project deals with magnetic field analysis of asynchronous machine cross section. This analysis is written in detail along with the necessary theory of asynchronous machine and the ANSYS program. The magnetic field of selected machine is measured by magnetic probe and results are compared with calculation. The next part of thesis is draft of device for the magnetic field analysis.

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Winiecki, Thomas. "Numerical studies of superfluids and superconductors." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/3876/.

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In this thesis we demonstrate the power of the Gross-Pitaevskii and the time-dependent Ginzburg-Landau equations by numerically solving them for various fundamental problems related to superfluidity and superconductivity. We start by studying the motion of a massive object through a quantum fluid modelled by the Gross-Pitaevskii equation. Below a critical velocity, the object does not exchange momentum or energy with the fluid. This is a manifestation of its superfluid nature. We discuss the effect of applying a constant force to the object and show that for small forces a vortex ring is creat

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Konšel, Ladislav. "Simulace dynamického chování vybavovače jističe." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219754.

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This work includes the theory of circuit breaker construction and is focused mainly on overload function. It mainly deals with electronic circuit breakers, i.e. equipped with an electronic trip unit. The work is focused on the part of trip unit - maglatch of trip unit. For the purposes of simulation, the geometric model is created. Maxwell program is used for the simulation. The work describes the options for conditions input which are necessary for simulation. Using the distribution of magnetic field intensity and magnetic flux density in the section of trip unit maglatch is determined by the

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Silva, Maria das Gra?as Dias da. "Efeitos da intera??o dipolar na nuclea??o de v?rtices em nano-cilindros ferromagn?ticos." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16635.

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Made available in DSpace on 2014-12-17T15:15:01Z (GMT). No. of bitstreams: 1 MariaGDS_TESE.pdf: 10253325 bytes, checksum: a11a4b9893c49f999607f55737b5aded (MD5) Previous issue date: 2014-07-28<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>The effect of confinement on the magnetic structure of vortices of dipolar coupled ferromagnetic nanoelements is an issue of current interest, not only for academic reasons, but also for the potential impact in a number of promising applications. Most applications, such as nano-oscillators for wireless data transmission, benefit f

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Webster, Stephen. "Prospects for Bose-Einstein condensation in caesium : cold collisions and dipole-force trapping." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325563.

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Moussaoui, Djelloul. "Propriétés bidimensionnelles statiques et dynamiques des tôles magnétiques." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0147.

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Le but de notre étude et d'analyser et de comprendre les propriétés dynamiques et statiques des tôles utilisées en Génie Electrique, quand elles sont soumises à un champ tournant. Nous avons réalisé au début une étude comparative des deux dispositifs de mesure en champ tournant existants au laboratoire. Le RSST 300 donne de meilleurs résultats, si le RSST 80 donne des mesures correctes pour les pertes. On observe des écarts qui peuvent être importants pour les champs. Ensuite nous avons proposé une méthode pour obtenir un comportement an hystérétique d'une tôle FeSi GO à partir des mesures dyn

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Aissani, Sarra. "Résonance quadrupolaire de l'azote-14 : amélioration de la qualité spectrale et effet d'un champ magnétique statique de faible amplitude." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0069/document.

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La Résonance Quadrupolaire Nucléaire (RQN) est une technique spectroscopique appliquée à l’état solide et qui ne nécessite aucun champ magnétique statique contrairement à la Résonance Magnétique Nucléaire (RMN). Elle permet de détecter, les molécules qui contiennent un noyau quadrupolaire (tel que l'azote-14). La RQN de l’azote-14 suscite un intérêt particulier car elle s'avère utile dans la détection de drogues et d’explosifs, qui contiennent, pour la plupart, des molécules azotées. Cette thèse porte en premier lieu sur l’amélioration de la qualité spectrale en résonance quadrupolaire (RQN) d

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Krchňavý, Jan. "Akvizice a předzpracování MRI obrazových sekvencí pro klinické perfusní zobrazování." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219512.

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This thesis describes the theory for static and dynamic magnetic-resonance imaging using contrast agents affecting T1 relaxation time. The available acquisition methods in the specified facility of Masaryk Oncological Institute in Brno are described. The sequences for subsequent experimental measurements are selected. The used phantoms are described. Acquisition protocol for measuring is described briefly and the evaluation method for the measured data is suggested. The best acquisition sequence and a method of measurements is chosen influenced by estimation of relaxation time T1, sensitivity

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Грецких, Светлана Владимировна. "Ослабление статического геомагнитного поля ферромагнитными элементами домов". Thesis, Государственное учреждение "Институт технических проблем магнетизма НАН Украины", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21435.

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Диссертация на соискание ученой степени кандидата технических наук по специальности 05.09.05 – теоретическая электротехника. – Национальный технический университет "Харьковский политехнический институт", Харьков, 2016. Диссертация посвящена математическому моделированию явления ослабления статического геомагнитного поля (ГМП) в помещениях жилых домов и разработке рекомендаций по методам его нормализации до безопасного уровня. Полученные в диссертации результаты в совокупности составляют существенный вклад в решение научно-прикладной задачи теоретической электротехники по моделированию явления

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Грецьких, Світлана Володимирівна. "Ослаблення статичного геомагнітного поля феромагнітними елементами будинків". Thesis, НТУ "ХПІ", 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/21433.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.05 – теоретична електротехніка. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016. Дисертація присвячена математичному моделюванню явища ослаблення статичного геомагнітного поля (ГМП) в приміщеннях житлових будинків та розробці рекомендацій з методів його нормалізації до безпечного рівня. На прикладі циліндричної феромагнітної колони проведено моделювання ослаблення ГМП за допомогою методу еквівалентних (фіктивних) магнітних зарядів та розв’язано задачу розрахунку інд

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Filho, Damião Pedro Meira. "Movimento quântico e semiclássico no campo de um magnético-solenóide." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-11042011-161013/.

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Um novo procedimento para construir os estados coerentes (CS) e os estados semiclássicos (SS) no campo de um magnético-solenóide é proposto. A idéia principal é baseada sobre o fato de que o AB solenóide quebra a simetria translacional no plano-xy, isto apresenta um efeito topológico tal que surgem dois tipos de trajetórias, aquelas que circundam e aquelas que não circundam o solenóide. Devido a este fato, deve-se construir dois tipos diferentes dos CS/SS, os quais correspondem as referidas trajetórias no limite semiclássico. Seguindo esta idéia, construímos os CS em duas etapas, primeiro os C

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Tchoumakov, Sergueï. "Signatures relativistes en spectroscopie de matériaux topologiques : en volume et en surface." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS258/document.

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Dans cette thèse je me suis intéressé au caractère relativiste de matériaux topologiques tridimensionnels : les semi-métaux de Weyl et les isolants topologiques. Après une introduction aux états de surfaces et aux matériaux topologiques, je discute leurs propriétés de covariance sous les rotations trigonométriques et hyperboliques. Ces transformations me permettent de traiter les équations du mouvement d'un électron dans un champ magnétique ou à la surface, sous l'influence d'un champ électrique ou d'une inclinaison de la relation de dispersion. En première partie, je l'illustre dans le cas de

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