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Dissertations / Theses on the topic 'Electrical and Electromagnetic Methods in Geophysics'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

Pearson, Patrick Ian 1964. "Application of electric and electromagnetic geophysical methods to detect fractures in unsaturated tuff." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278223.

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Three electrical and electromagnetic geophysical methods were used to examine the moisture and permeability distribution and identify fractures in a partially saturated, fractured ash-flow tuff near Superior, Arizona. Experiments using ground penetrating radar (GPR) to locate targets with known orientations in the tuff were used to assess the angular limits of fracture detection from radar profiles. Identification of fractures from radar records appears to be limited to those with dips of less than 45°. The application of a single well electrical tracer (SWET) technique proved effective in

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2

Derie, Bereket Mebrahtu. "Integration of geophysical methods for groundwater exploration in hard rock areas : application to Alla Valley, Eritrea, NE Africa." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/12616.

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The integrated use of Electromagnetic Ground Conductivity, Ground Electrical Resistivity and Seismic Refraction geophysics methods was made in Alia valley, Eritrea for the aim of developing a methodology best suited for ground water exploration in hard rock areas with limited professional and financial resources. A total area of 25 square kilometer was covered with the geophysical surveys. The effective use of information from wells and geological information from outcrops and existing literature helped to create a preliminary conceptual hydrogeologic model that in turn provided a general pict

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3

Shan, Chunling. "Natural and Controlled Source Magnetotelluric Data Processing and Modeling." Doctoral thesis, Uppsala universitet, Geofysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229917.

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In this thesis, four studies using different geophysical electromagnetic methods are presented. In the first study dealing with airborne measurements, the noise response due to the rotation of the aircraft and the aircraft itself as a metallic conductive body on the Earth's electromagnetic response in very low frequency and low frequency band was investigated. The magnetic fields are independent of the aircraft in the VLF band and part of the LF band. But at higher frequencies (above 100 kHz), the signals are more influenced by the aircraft. The aircraft also generates its own noise frequencie

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4

Garambois, Stéphane. "Etudes expérimentales et théoriques des conversions d'ondes sismo-électriques dans les milieux poreux superficiels." Phd thesis, Université Joseph Fourier (Grenoble), 1999. http://tel.archives-ouvertes.fr/tel-00719591.

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Les phénomènes électrocinétiques créés à l'échelle microscopique par le passage d'ondes sismiques à travers des milieux poreux saturés en fluides génèrent des conversions entre énergies sismique et électromagnétique observables à l'échelle macroscopique. Nous avons étudié ces couplages à la fois sur un plan expérimental et théorique dans le but de déterminer leur utilisation potentielle pour la détection et la caractérisation du contenu en fluides des milieux poreux superficiels. Nous présentons dans un premier temps une série d'expériences de terrain effectuées pour enregistrer, à l'aide d'an

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5

Linde, Niklas. "Characterization of Hydrogeological Media Using Electromagnetic Geophysics." Doctoral thesis, Uppsala universitet, Geofysik, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5912.

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Radio magnetotellurics (RMT), crosshole ground penetrating radar (GPR), and crosshole electrical resistance tomography (ERT) were applied in a range of hydrogeological applications where geophysical data could improve hydrogeological characterization. A profile of RMT data collected over highly resistive granite was used to map subhorizontal fracture zones below 300m depth, as well as a steeply dipping fracture zone, which was also observed on a coinciding seismic reflection profile. One-dimensional inverse modelling and 3D forward modelling with displacement currents included were necessary t

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6

Saunders, Jonathan Howard. "Electrical inversion and characterisation methods in geophysics." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.413721.

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7

Barongo, Justus Obiko. "Application of transient airborne electromagnetic and ground resistivity methods to geological mapping in tropical terrains." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=75983.

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The feasibility of using time-domain airborne electromagnetic and ground resistivity methods in geological mapping in tropical terrains is investigated. The investigation is based upon evaluation of the linear inverse theory in the determination of physical parameters of the weathered layer necessary for interpretation of underlying lithology.<br>Inversion of ground resistivity sounding data from the greenstone belt in western Kenya yields conductivities and thicknesses that are consistent with geology. A similar inversion of modelled time-domain airborne electromagnetic data shows that conduc

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8

Debroux, Patrick Serge 1957. "A numerical electromagnetic study of shallow geophysical targets." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288769.

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Prediction of the response of high-frequency induction survey tools to 3-dimensional targets is needed to aid in tool and survey design, in the interpretation of data, and to analyze the interaction of the individual field components with the target of interest. To this end, two numerical algorithms (TSAR and NEC) were imported and adapted to solve geophysical electromagnetic problems. A third algorithm (EM1DSH) was used to quantitatively analyze the role of current channeling on the response of shallow targets, and to verify that the TSAR and NEC algorithms include the important effect of cur

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9

Shank, Jared Wyatt. "A geophysical investigation to locate missing graves utilizing ground penetrating radar, electromagnetic, and magnetic methods." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1389704983.

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10

Thomas, Scott James 1961. "Modeling and testing the LASI electromagnetic subsurface imaging systems." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/282186.

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Three frequency-domain electromagnetic subsurface profiling systems have been developed which use frequencies from 30Hz to 30kHz, 1kHz to 1MHz, and from 30kHz to 30MHz respectively. The systems operate in the near-field and measure the ellipticity of the magnetic field. A grounded wire or a vertical magnetic dipole is used as the transmitter antenna. The receiving antennas consist of three mutually orthogonal antennas which are placed on the ground in an arbitrary orientation. Instead of performing rotations in three-dimensional complex space, a simple two-dimensional rotation operating in the

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11

Goedecke, Walter 1954. "Field studies and scale modeling using cross-borehole electromagnetic diffraction probing." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/278261.

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The scope of these studies encompasses both field site testing and scale modeling. The purpose was to better understand the complexities of electromagnetic diffraction geotomography, or the imaging of ground between boreholes using electromagnetic waves. Two field sites and a scale model tank were investigated. One field site, the San Xavier Mine facility, is located in metamorphosed paleozoic limestone. This site proved a challenge in that the medium was fairly inhomogeneous and resulted in server wave scattering. Inter-borehole transmission allowed only 15 MHz to penetrate for an adequate si

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12

Wiid, P. Gideon. "Investigating cost-effective EMC methods." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1520.

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Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.<br>Due to the expensive nature of high frequency measurements in the EMC (Electromagnetic Compatability) field, more affordable methods of measurement instrumentation and environments are investigated. Different calibration methods for an Automatic Network Analyser (ANA) are evaluated against each other to determine the most cost-effective method of calibration. The mathematics for all the calibration methods are used in MATLAB programs which perform the error-calculation and correction which is usu

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13

Parks, Eric M. "Analysis of Electromagnetic and Seismic Geophysical Methods for Investigating Shallow Sub-surface Hydrogeology." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2007.

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An integrated electromagnetic (EM) and seismic geophysical study was performed to evaluate non-invasive approaches to estimate depth to shallow groundwater in arid environments with elevated soil salinity where the installation of piezometers would be impractical or prohibited. Both methods were tested in two study areas (semi-arid and arid respectively), one in Palmyra, Utah, USA near the shore of Utah Lake where groundwater is shallow and unconfined in relatively homogeneous lacustrine sediments. The other area is Carson Slough, Nevada, USA near Ash Meadows National Wildlife Refuge in Amargo

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14

Biedler, Murray W. "Delineation of buried stream channels using geophysical techniques." Thesis, Rhodes University, 1994. http://hdl.handle.net/10962/d1005498.

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This study sets out to evaluate the use of geophysical methods for delineating buried stream channels, which can act as zones of preferential flow within a less hydraulically conductive aquifer. This information is important for gaining an understanding of flow dynamics of alluvial systems. The most reliable method of delineating the dimensions of aquifers is by drilling, which is an expensive proposition and is best preceded by a preliminary geophysical study to help define target zones for a drilling program. The study area is located adjacent to the Coerney River in the Sundays River Valley

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15

Bergman, Andrew William. "Searching for the Unmarked Henry Kinsey Family Graves at the VA Hospital Grounds in Dayton, Ohio, Using Magnetic, Electromagnetic, and Radar Methods." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1494956391476108.

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16

Moss, Christopher D. Q. (Christopher Doniert Q. ). 1973. "Numerical methods for electromagnetic wave propagation and scattering in complex media." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/26909.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.<br>Vita.<br>Includes bibliographical references (p. 227-242).<br>Numerical methods are developed to study various applications in electromagnetic wave propagation and scattering. Analytical methods are used where possible to enhance the efficiency, accuracy, and applicability of the numerical methods. Electromagnetic induction (EMI) sensing is a popular technique to detect and discriminate buried unexploded ordnance (UXO). Time domain EMI sensing uses a transient primary magnetic

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17

Carsillo, Vincent John. "MONITORING STORMWATER INFILTRATION IN A VACANT LOT COMPARING TIME-LAPSE ELECTROMAGNETIC INDUCTION AND ELECTRICAL RESISTIVITY TOMOGRAPHY." Master's thesis, Temple University Libraries, 2018. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/518905.

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Geology<br>M.S.<br>Vacant lots in cities and surrounding urban areas can potentially be used for stormwater management because they are pervious. However, the extent to which vacant lots provide pervious cover to increase infiltration and reduce stormflow is poorly understood. The goal of this study was to develop faster methods for monitoring stormwater infiltration to improve characterization of heterogeneous urban systems. Geophysical techniques are capable of mapping and characterizing subsurface materials, but are often limited by time and sensitivity constraints. In this study, the infil

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18

King, Joshua David. "Using a 3D finite element forward modeling code to analyze resistive structures with controlled-source electromagnetics in a marine environment." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/1371.

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Controlled-Source Electromagnetics (CSEM) is a method that has been used since the 1980s in the marine environment for determining electrical properties of the subsurface. Receivers on the seafloor collect total electric and magnetic fields which are produced as a result of interaction of the transmitter generated primary fields with the seawater and subsurface. Badea et al. (2001) coded an existing algorithm for solving Maxwells equations. This finite element 3D forward modeling algorithm is used to simulate CSEM experiments. The objective of the present study is to model the changes in

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19

Mechaik, Mehdi Mohamad. "Novel Theoretical And Numerical Methods For The Computation Of Electromagnetic Fields Due To Current Sources." Diss., The University of Arizona, 1994. http://hdl.handle.net/10150/186619.

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In this dissertation, series expansions are developed for the Incomplete Lipschitz-Hankel integrals (ILHIs) Je₀(a,z) and Ye₀(a,z). These expansions are obtained using the Laplace transform technique together with the theory of contour integration. These special functions are encountered in the solutions for numerous problems in electromagnetics. For example, ILHIs are used in this dissertation to obtain exact, closed-form field expressions for a semi-infinite traveling wave current filament in homogeneous space. They are also used together with the steepest descent technique to obtain expressi

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20

Greenwood, Wm Jason. "Mapping porewater salinity with electromagnetic and electrical methods in shallow coastal environments, Terra Ceia, Florida." [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000352.

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21

Wilson, Glenn Andrew, and glenn wilson@griffith edu au. "Plane Wave Propagation Problems in Electrically Anisotropic and Inhomogeneous Media with Geophysical Applications." Griffith University. School of Microelectronic Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030325.210206.

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Boundary value problems required for modelling plane wave propagation in electrically anisotropic and inhomogeneous media relevant to the surface impedance methods in electromagnetic geophysics are formally posed and treated. For a homogeneous TM-type wave propagating in a half space with both vertical and horizontal inhomogeneities where the TM-type wave is aligned with one of the elements of the conductivity tensor, it is shown using exact solutions that the shearing term in the homogeneous Helmholtz equation for inclined anisotropic media: [Equation 1], unequivocally vanishes and solutions

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22

McGarr, Jeffery T. "Geophysical Imaging of Hyporheic Mixing Dynamics Within Compound Bar Deposits." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1617109253147661.

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23

Galiana, Blanch Savitri. "Two-dimensional modeling and inversion of the controlled-source electromagnetic and magnetotelluric methods using finite elements and full-space PDE-constrained optimization strategies." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/400616.

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The controlled-source electromagnetics (CSEM) and magnetotellurics (MT) methods are common geophysical tools for imaging the Earth's electrical interior. To appreciate measured data, both methods require forward and inverse modeling of the subsurface with the ultimate goal of finding a feasible model for which the simulated data reasonably fits the observations. The goodness of this fit depends on the error in the measured data, on the numerical error and on the degree of approximation inferred by numerical modeling. Therefore, active research focuses on new methods for modeling and inversion

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24

Tan, Xihe [Verfasser], Julia [Akademischer Betreuer] Kowalski, and Andreas [Akademischer Betreuer] Kemna. "Development of electromagnetic induction measurement and inversion methods for soil electrical conductivity investigations / Xihe Tan ; Julia Kowalski, Andreas Kemna." Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1238602371/34.

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25

Sayer, Suzanne. "Applications of Roll-Along Electrical Resistivity Surveying in Conjunction with Other Geophysical Methods for Engineering and Environmental Site Characterization." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-01252008-161612/.

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26

Botha, Matthys Michiel. "Efficient finite element electromagnetic analysis of antennas and microwave devices : the FE-BI-FMM formulation and a posteriori error estimation for p adaptive analysis." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52818.

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Dissertation (PhD)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: This document presents a Galerkin FE formulation for the full-wave, frequency domain, electromagnetic analysis of three dimensional structures relevant to microwave engineering, together with the investigation of two techniques to enhance the formulation's computational efficiency. The first technique considered is the fast multi pole method (FMM) and the second technique is adaptive refinement of the discretization, based on a posteriori error estimation. Thus, the motivation for the work presented in this docume

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27

Börner, Jana H. "Electrical phenomena during CO2–rock interaction under reservoir conditions : experimental investigations and their implications for electromagnetic monitoring applications." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2016. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-206674.

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Geophysical methods are essential for exploration and monitoring of subsurface formations, e.g. in carbon dioxide sequestration or enhanced geothermal energy. One of the keys to their successful application is the knowledge of how the measured physical quantities are related to the desired reservoir parameters. The work presented in this thesis shows that the presence of carbon dioxide (CO2) in pore space gives rise to multiple processes all of which contribute to the electrical rock conductivity variation. Basically, three mechanisms take place: (1) CO2 partially replaces the pore water, whic

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28

Gursoy, Doga. "Multi-frequency Contactless Electrical Impedance Imaging Using Realistic Head Models: Single Coil Simulations." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608201/index.pdf.

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Contactless electrical impedance imaging technique is based upon the measurement of secondary electromagnetic fields caused by induced currents inside the body. In this study, a circular single-coil is used as a transmitter and a receiver. The purpose of this study is twofold: (1) to solve the induced current density distribution inside the realistic head model resulting from a sinusoidal excitation, (2) to calculate the impedance change of the same coil from the induced current distribution inside the head model. The Finite Difference Method is used to solve the induced current density in the

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Yeboah-Forson, Albert. "Hydrogeophysical Characterization of Anisotropy in the Biscayne Aquifer Using Geophysical Methods." FIU Digital Commons, 2013. http://digitalcommons.fiu.edu/etd/919.

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The anisotropy of the Biscayne Aquifer which serves as the source of potable water for Miami-Dade County was investigated by applying geophysical methods. Electrical resistivity imaging, self potential and ground penetration radar techniques were employed in both regional and site specific studies. In the regional study, electrical anisotropy and resistivity variation with depth were investigated with azimuthal square array measurements at 13 sites. The observed coefficient of electrical anisotropy ranged from 1.01 to 1.36. The general direction of measured anisotropy is uniform for most sites

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Huda, Gazi Mostafa. "EFFECT OF A SILICON TIP ON ABSORPTION CROSS SECTION, FIELD ENHANCEMENT, AND LOCALIZED SURFACE PLASMON RESONANCE OF DIFFERENT SIZED GOLD NANOPARTICLES UNDER EVANESCENT WAVE ILLUMINATION." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/114.

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We have numerically investigated the influence of a nanoscale silicon tip in proximity to an illuminated gold nanoparticle. We describe how the position of the high-permittivity tip and the size of a nanoparticle impact the absorption, peak electric field and surface plasmon resonance wavelength under different illumination conditions. We detail the finite element method (FEM) approach we have used for this, whereby we specify a volume excitation field analytically and calculate the difference between this source field and the total field (i.e., scattered-field formulation). We show that a nan

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31

Bhamidipati, Raghava A. "Use Of Laboratory Geophysical And Geotechnical Investigation Methods To Characterize Gypsum Rich Soils." UKnowledge, 2016. http://uknowledge.uky.edu/ce_etds/45.

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Gypsum rich soils are found in many parts of the world, particularly in arid and semi-arid regions. Most gypsum occurs in the form of evaporites, which are minerals that precipitate out of water due to a high rate of evaporation and a high mineral concentration. Gypsum rich soils make good foundation material under dry conditions but pose major engineering hazards when exposed to water. Gypsum acts as a weak cementing material and has a moderate solubility of about 2.5 g/liter. The dissolution of gypsum causes the soils to undergo unpredictable collapse settlement leading to severe structural

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Davis, Clayton Paul. "Understanding and Improving Moment Method Scattering Solutions." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd620.pdf.

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Velayudhan, Vipin. "Méthodes de mesure pour l’analyse vectorielle aux fréquences millimétriques en technologie intégrée." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT035/document.

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Cette thèse porte sur l’étude des méthodes de mesure pour l’analyse vectorielle des circuits microélectroniques en technologie intégrée aux fréquences millimétriques. Pour réussir à extraire les paramètres intrinsèques de circuits réalisés aux longueurs d'ondes millimétriques, les méthodes actuelles de calibrage et de de-embedding sont d'autant moins précises que les fréquences de fonctionnement visées augmentent au-delà de 100 GHz notamment. Cela est d’autant plus vrai pour la caractérisation des dispositifs passifs tels que des lignes de propagation. La motivation initiale de ces travaux de

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Tufekci, Sinan. "Combined Surface-Wave and Resistivity Imaging for Shallow Subsurface Characterization." Ohio University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1250891786.

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Beckstein, Pascal. "Methodenentwicklung zur Simulation von Strömungen mit freier Oberfläche unter dem Einfluss elektromagnetischer Wechselfelder." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232474.

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Im Bereich der industriellen Metallurgie und Kristallzüchtung treten bei zahlreichen Anwendungen, wo magnetische Wechselfelder zur induktiven Beeinflussung von leitfähigen Werkstoffen eingesetzt werden, auch Strömungen mit freier Oberfläche auf. Das Anwendungsspektrum reicht dabei vom einfachen Aufschmelzen eines Metalls in einem offenen Tiegel bis hin zur vollständigen Levitation. Auch der sogenannte RGS-Prozess, ein substratbasiertes Kristallisationsverfahren zur Herstellung siliziumbasierter Dünnschichtmaterialien, ist dafür ein Beispiel. Um bei solchen Prozessen die Interaktion von Magnetf

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Dai, Junwen. "Efficient Computation of Electromagnetic Waves in Hydrocarbon Exploration Using the Improved Numerical Mode Matching (NMM) Method." Diss., 2016. http://hdl.handle.net/10161/12111.

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<p>In this study, we developed and improved the numerical mode matching (NMM) method which has previously been shown to be a fast and robust semi-analytical solver to investigate the propagation of electromagnetic (EM) waves in an isotropic layered medium. The applicable models, such as cylindrical waveguide, optical fiber, and borehole with earth geological formation, are generally modeled as an axisymmetric structure which is an orthogonal-plano-cylindrically layered (OPCL) medium consisting of materials stratified planarly and layered concentrically in the orthogonal directions.</p><p>In th

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(5929478), Hao Bai. "Non-Destructive Evaluation of the Condition of Subsurface Drainage in Pavement Using Ground Penetrating RADAR (GPR)." Thesis, 2020.

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<div>Pavement drainage systems are one of the key drivers of pavement function and longevity, and effective drain maintenance can significantly extend a pavement's service life. Maintenance of these drains, however, is often hampered by the challenge of locating the drains. Ground Penetrating Radar (GPR) typically offers a rapid and effective method to detect these underground targets. However, typical detection schema that rely upon the observation of the hyperbolic return from a GPR scan of a buried conduit still tend to miss many of the older drains beneath pavements as they may be partiall

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何承諭. "Electrical Modeling of Integrated-Circuit Packages Using Electromagnetic Methods." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10552413638842493484.

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Paraschos, Georgios N. "Robust and scalable domain decomposition methods for electromagnetic computations." 2012. https://scholarworks.umass.edu/dissertations/AAI3545972.

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The Finite Element Tearing and Interconnecting (FETI) and its variants are probably the most celebrated domain decomposition algorithms for partial differential equation (PDE) scientific computations. In electromagnetics, such methods have advanced research frontiers by enabling the full-wave analysis and design of finite phased array antennas, metamaterials, and other multiscale structures. Recently, closer scrutiny of these methods have revealed robustness and numerical scalability problems that prevent the most memory and time efficient variants of FETI from gaining widespread acceptance. T

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Paraschos, Georgios. "Robust and Scalable Domain Decomposition Methods for Electromagnetic Computations." 2012. https://scholarworks.umass.edu/open_access_dissertations/619.

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The Finite Element Tearing and Interconnecting (FETI) and its variants are probably the most celebrated domain decomposition algorithms for partial differential equation (PDE) scientific computations. In electromagnetics, such methods have advanced research frontiers by enabling the full-wave analysis and design of finite phased array antennas, metamaterials, and other multiscale structures. Recently, closer scrutiny of these methods have revealed robustness and numerical scalability problems that prevent the most memory and time efficient variants of FETI from gaining widespread acceptance. T

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Ramachandran, Aravind. "Optimal spatial grids for efficient numerical simulation of time-domain electromagnetic phenomena by finite methods /." 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3363065.

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Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2009.<br>Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: 3700. Adviser: Andreas C. Cangellaris. Includes bibliographical references (leaves 94-99) Available on microfilm from Pro Quest Information and Learning.

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Jiang, Peilin. "Time domain integral equation-based methods for analyzing electromagnetic scattering from objects residing in lossy media /." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3292797.

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Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.<br>Source: Dissertation Abstracts International, Volume: 68-12, Section: B, page: 8253. Adviser: Eric Michielssen. Includes bibliographical references. Available on microfilm from Pro Quest Information and Learning.

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Moura, de Andrade Fernando César. "Inverze a hloubkový rozsah dipólových elektromagnetických indukčnı́ch měřenı́ v geofyzice." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-404560.

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Inversion and Depth Range of Dipole Electromagnetic Induction Measurements in Geophysics Fernando César Moura de Andrade Institute of Hydrogeology, Engineering Geology and Applied Geophysics Faculty of Science, Charles University Electromagnetic induction geophysical methods are, basically, composed by a transmitter which produces a magnetic field and a set of receivers which measure the primary magnetic field, from the transmitter, superimposed by secondary magnetic fields inducted in the subsurface. Equipment operating at, relatively, low frequencies and with short distances between the tran

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De, Smedt P., Meirvenne M. Van, T. Saey, E. Baldwin, Christopher F. Gaffney, and Vincent L. Gaffney. "Unveiling the prehistoric landscape at Stonehenge through multi-receiver EMI." 2014. http://hdl.handle.net/10454/10438.

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Yes<br>Archaeological research at Stonehenge (UK) is increasingly aimed at understanding the dynamic of the wider archaeological landscape. Through the application of state-of-the-art geophysical techniques, unprecedented insight is being gathered into the buried archaeological features of the area. However, applied survey techniques have rarely targeted natural soil variation, and the detailed knowledge of the palaeotopography is consequently less complete. In addition, metallic topsoil debris, scattered over different parts of the Stonehenge landscape, often impacts the interpretation of geo

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(9733025), Li Xue. "Rapid Modeling and Simulation Methods for Large-Scale and Circuit-Intuitive Electromagnetic Analysis of Integrated Circuits and Systems." Thesis, 2020.

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<div>Accurate, fast, large-scale, and circuit-intuitive electromagnetic analysis is of critical importance to the design of integrated circuits (IC) and systems. Existing methods for the analysis of integrated circuits and systems have not satisfactorily achieved these performance goals. In this work, rapid modeling and simulation methods are developed for large-scale and circuit-intuitive electromagnetic analysis of integrated circuits and systems. The derived model is correct from zero to high frequencies where Maxwell's equations are valid. In addition, in the proposed model, we are able to

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Beckstein, Pascal. "Methodenentwicklung zur Simulation von Strömungen mit freier Oberfläche unter dem Einfluss elektromagnetischer Wechselfelder." Doctoral thesis, 2017. https://tud.qucosa.de/id/qucosa%3A30749.

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Im Bereich der industriellen Metallurgie und Kristallzüchtung treten bei zahlreichen Anwendungen, wo magnetische Wechselfelder zur induktiven Beeinflussung von leitfähigen Werkstoffen eingesetzt werden, auch Strömungen mit freier Oberfläche auf. Das Anwendungsspektrum reicht dabei vom einfachen Aufschmelzen eines Metalls in einem offenen Tiegel bis hin zur vollständigen Levitation. Auch der sogenannte RGS-Prozess, ein substratbasiertes Kristallisationsverfahren zur Herstellung siliziumbasierter Dünnschichtmaterialien, ist dafür ein Beispiel. Um bei solchen Prozessen die Interaktion von Magnetf

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