Dissertations / Theses on the topic 'Magnetic and gravity data'
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Mohammadi, Soroor. "Processing and Modeling of Gravity, Magnetic and Electromagnetic Data in the Falkenberg Area, Sweden." Thesis, Uppsala universitet, Geofysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-232714.
Full textSzwillus, Wolfgang [Verfasser]. "Lithospheric structure from forward and inverse modeling of satellite gravity and magnetic data / Wolfgang Szwillus." Kiel : Universitätsbibliothek Kiel, 2019. http://d-nb.info/1190644797/34.
Full textNxantsiya, Zusakhe. "A study of the southwestern Karoo basin in South Africa using magnetic and gravity data." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/4748.
Full textSaliaris, Ioannis R. "Real-Time data acquisition and processing of the Magnetic, Angular Rate and Gravity (MARG) sensor /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FSaliaris.pdf.
Full textThesis advisor(s): Xiaoping Yun. Includes bibliographical references (p. 59-60). Also available online.
Harbi, Hussein M. "2-D MODELING OF SOUTHERN OHIO BASED ON MAGNETIC FIELD INTENSITY, GRAVITY FILED INTENSITY AND WELL LOG DATA." University of Akron / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1125523809.
Full textGeorgiopoulos, Andreas Xenophon. "Models for the upper crust of the Chaleston, South Carolina, seismic zone based on gravity and magnetic data." Thesis, Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/25861.
Full textFidler, Michael L. "Three dimensional digital analysis of 2,500 square kilometers of gravity and magnetic survey data, Bellefontaine Outlier area, Ohio /." Columbus, Ohio : Ohio State University, 2003. http://hdl.handle.net/1811/6110.
Full textBrumby, Michael M. "Modelling of gravity and magnetic data to aid the interpretation of a seismic section from the onshore Canning Basin, northwestern Australia /." Title page, table of contents and abstract only, 1985. http://web4.library.adelaide.edu.au/theses/09SB/09sbb893.pdf.
Full textRodrigues, Rafael Saraiva. "Evid?ncias da heran?a geotect?nica pr?-cambriana na gera??o da Bacia Potiguar: um estudo geof?sico multdisciplinar." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18833.
Full textCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
The 3D gravity modeling of the Potiguar rift basin consisted of a digital processing of gravity and aeromagnetic data, subsidized by the results of Euler deconvolution of gravity and magnetic data and the interpretation of seismic lines and wells descriptions. The gravity database is a compilation of independent geophysical surveys conducted by several universities, research institutions and governmental agencies. The aeromagnetic data are from the Bacia Potiguar and Plataforma Continental do Nordeste projects, obtained from the Brazilian Petroleum Agency (ANP). The solutions of the Euler Deconvolution allowed the analysis of the behavior of the rift main limits. While the integrated interpretation of seismic lines provided the delimitating horizons of the sedimentary formations and the basement top. The integration of these data allowed a 3D gravity modeling of basement topography, allowing the identification of a series of internal structures of the Potiguar rift, as well intra-basement structures without the gravity effect of the rift. The proposed inversion procedure of the gravity data allowed to identify the main structural features of the Potiguar rift, elongated in the NE-SW direction, and its southern and eastern faulted edges, where the sedimentary infill reachs thicknesses up to 5500 m. The southern boundary is marked by the Apodi and Baixa Grande faults. These faults seem to be a single NW-SE oriented fault with a strong bend to NE-SW direction. In addition, the eastern boundary of the rift is conditioned by the NE-SW trending Carnaubais fault system. It was also observed NW-SE oriented faults, which acted as transfer faults to the extensional efforts during the basin formation. In the central part of the residual anomaly map without the gravity effect of the rift stands out a NW-SE trending gravity high, corresponding to the Or?s-Jaguaribe belt lithotypes. We also observe a gravity maximum parallel to the Carnaubais fault system. This anomaly is aligned to the eastern limit of the rift and reflects the contact of different crustal blocks, limited by the eastern ward counterpart of the Portalegre Shear Zone
A modelagem gravim?trica 3D do rifte da Bacia Potiguar, apresentada neste trabalho, constituiu de um processamento digital de dados gravim?tricos e aeromagn?ticos, subsidiados pelos resultados da Deconvolu??o de Euler de dados gravim?tricos e magn?ticos e pela interpreta??o de linhas s?smicas e descri??es de po?os. O banco de dados gravim?trico ? proveniente de um trabalho de compila??o de levantamentos geof?sicos independentes realizados por diversas universidades, institui??es de pesquisa e ?rg?os governamentais. Os dados aeromagn?ticos s?o proveniente dos projetos Bacia Potiguar e Plataforma Continental do Nordeste, obtidos junto ? Ag?ncia Nacional do Petr?leo, G?s Natural e Biocombust?veis (ANP). As solu??es da Deconvolu??o de Euler possibilitaram a an?lise do comportamento dos principais limites do rifte, enquanto que a interpreta??o integrada das linhas s?smicas propiciou a delimita??o dos relevos dos horizontes da base das forma??es sedimentares e do topo do embasamento do Rifte Potiguar. A integra??o desses dados permitiu uma modelagem gravim?trica 3D do relevo do embasamento da bacia, possibilitando a identifica??o de uma s?rie de estruturas do arcabou?o estrutural do Rifte Potiguar e do embasamento cristalino sem o efeito gravim?trico do rifte. Com o procedimento de invers?o dos dados gravim?tricos, foi poss?vel identificar as principais fei??es estruturais do rifte da Bacia Potiguar, alongadas na dire??o NE-SW, bem como suas bordas falhadas nos limites Sul e Leste do rifte, onde o pacote sedimentar atinge espessuras superiores a 5500 m. O limite Sul ? marcado pelas falhas de Apodi e Baixa Grande, aparentando tratar-se de uma ?nica falha de dire??o NW-SE, com forte inflex?o para NE-SW. Observa-se ainda o limite Leste do rifte condicionado pelo Sistema de Falha Carnaubais de dire??o preferencial NE-SW. Observa-se ainda falhas de dire??o NW-SE, que atuaram como falhas de transfer?ncia aos esfor?os distensionais de forma??o da bacia. No mapa de anomalias residuais do embasamento cristalino sem o efeito gravim?trico do rifte destaca-se, na sua parte central, um alto gravim?trico de dire??o NW-SE, correspondendo a litotipos da Faixa Or?s-Jaguaribe. Observa-se ainda um m?ximo gravim?trico paralelo ao Sistema de Falhas de Carnaubais. Tal anomalia encontra-se alinhada ao limite Leste do rifte e reflete o contato de blocos crustais distintos, limitados pela continua??o Nordeste da Zona de Cisalhamento Portalegre
Strydom, Migael. "Magnetic vortices in gauge/gravity duality." Diss., Ludwig-Maximilians-Universität München, 2014. http://nbn-resolving.de/urn:nbn:de:bvb:19-172099.
Full textWe study strongly-coupled phenomena using gauge/gravity duality, with a particular focus on vortex solutions produced by magnetic field and time-dependent problems in holographic models. The main result is the discovery of a counter-intuitive effect where a strong non-abelian magnetic field induces the formation of a triangular vortex lattice ground state in a simple holographic model. Gauge/gravity duality is a powerful theoretical tool that has been used to study strongly-coupled systems ranging from the quark-gluon plasma produced at particle colliders to condensed matter theories. The most important idea is that of duality: a strongly coupled quantum field theory can be studied by investigating the properties of a particular gravity background described by Einstein's equations. One gravity background we study in this dissertation is AdS--Schwarzschild with an SU(2) gauge field. We switch on the gauge field component that gives the field theory an external magnetic field. When the magnetic field is above a critical value, we find that the system is unstable, indicating a superconducting phase transition. We find the instability in two ways. Firstly, we do a quasinormal mode analysis, studying fluctuations about the background. Secondly, we rewrite the equations in Schrödinger form and numerically find that, as the magnetic field is increased, the potential deepens until it is capable of supporting a bound state. Next we show that the resulting superconducting ground state is a triangular vortex lattice. This is done by performing a perturbative expansion in a small parameter proportional to the condensate size. After solving the equations to third order, we use the holographic dictionary to calculate the total energy of different lattice solutions and identify the minimum energy state. In addition, we show that the result holds in an AdS--hard wall model as well, which is dual to a confining theory. Next we extend the simple gravity model to include a chemical potential and repeat the analysis. When the chemical potential, magnetic field or both are large, the system is in a superconducting phase. We calculate the precise phase diagram numerically. The ground state in the superconducting phase near the phase transition line is shown to be a triangular vortex lattice with lattice spacing depending only on the magnetic field strength. We comment on the relevance of the results to the study of inhomogeneous ground states in holographic superconductors, a topic in which there has been much interest recently. Our results are novel not only because of the previously unknown inhomogeneous black hole solution, but also because of the effect of a large magnetic field inducing rather than inhibiting the vortex lattice ground state in a holographic model. We also study time-dependent phenomena in a holographic generalisation of the Kondo model, a simple condensed matter model of a magnetic impurity coupled strongly to a sea of electrons. This requires techniques from numerical relativity and allows us to determine the response of the system to a quench in the coupling. This dissertation is based on work the author did during a PhD fellowship under the supervision of PD Dr. J. K. Erdmenger at the Max-Planck-Institut für Physik in Munich, Germany from August 2011 to May 2014. The relevant publications are: [1] M. Ammon, J. Erdmenger, P. Kerner, and M. Strydom, “Black Hole Instability Induced by a Magnetic Field,” Phys.Lett. B706 (2011) 94–99, arXiv:1106.4551 [hep-th], [2] Y.-Y. Bu, J. Erdmenger, J. P. Shock, and M. Strydom, “Magnetic field induced lattice ground states from holography,” JHEP 1303 (2013) 165, arXiv:1210.6669 [hep-th].
Ons bestudeer sterk gekoppelde fenomene deur die gebruik van dualiteit tussen ykteorieë en gravitasieteorieë. Ons fokus spesifiek op vorteks oplossings wat deur magnetiese velde voortgebring word, asook tyd-afhanklike probleme in holografiese modelle. Die belangrikste resultaat is die ontdekking van 'n onverwagte effek waar sterk nie-abelse magnetiese velde 'n driehoekige vorteksrooster grondtoestand uitlok in 'n holografiese model. Die dualiteit tussen ykteorieë en gravitasie is 'n nuttige instrument wat al gebruik is om sterk-gekoppelde stelsels te bestudeer wat wissel van die kwark-gluon plasma, wat geproduseer is by deeltjieversnellers, tot gekondenseerde materie teorieë. Die belangrikste begrip is dualiteit: 'n sterk gekoppelde kwantumveldteorie kan bestudeer word deur die eienskappe van 'n spesifieke swaartekrag agtergrond, wat beskryf word deur Einstein se vergelykings, te ondersoek. Een swaartekrag agtergrond wat ons bestudeer is AdS--Schwarzschild met 'n SU(2) ykveld. Ons skakel die ykveld komponent aan wat in die veldteorie duaal is aan 'n eksterne magnetiese veld. Wanneer die magnetiese veld bo 'n spesifieke waarde val, vind ons dat die stelsel onstabiel is, wat dui op 'n supergeleidende fase oorgang. Ons vind die onstabiliteit op twee maniere. Eerstens, doen ons 'n quasinormale modus analise, waarin ons versteurings van die agtergrond bestudeer. Tweedens, herskryf ons die vergelykings in Schrödinger vorm en vind numeries dat soos die magnetiese veld sterker word, verdiep die potensiaal totdat dit diep genoeg is vir 'n gebonde toestand om te vorm. Volgende wys ons dat die gevolglike supergeleidende grondtoestand 'n rooster van driehoekige vortekse is. Dit word gedoen deur die uitvoering van 'n versteuringsuitbreiding in 'n klein parameter wat proporsioneel is tot die grootte van die kondensaat. Na die oplossing van die vergelykings tot op die derde orde, gebruik ons die holografiese vertalingsvoorskrif om die totale energie van verskillende rooster oplossings te bereken en~die minimum energie toestand te identifiseer. Daarna wys ons dat die gevolge in 'n AdS--hard wall model ook waar is. Die AdS--hard muur model is duaal tot 'n teorie met confinement. Volgende brei ons die eenvoudige swaartekrag model uit sodat dit 'n chemiese potensiaal in sluit en dan herhaal ons die analise. Wanneer die chemiese potensiaal, magnetiese veld of albei groot is, is die stelsel in 'n supergeleidende fase. Ons bereken die fase diagram numeries. Die grondtoestand in die supergeleidende fase naby die fase-oorgangslyn vorm 'n driehoekige vorteksrooster met rooster spasiëring wat afhang van die sterkte van die magnetiese veld. Ons lewer kommentaar op die toepaslikheid van die resultate tot nie-homogene grondtoestande in holografiese supergeleiers, 'n onderwerp waarin daar onlangs baie belangstelling was. Die nuwigheid van ons resultate l\^e in beide die voorheen onbekende swartkolk oplossing en die effek van 'n groot magnetiese veld wat die vorteksrooster grondtoestand in 'n holografiese model eerder voortbring as verhinder. Ons bestudeer ook tyd-afhanklike fenomene in 'n holografiese veralgemening van die Kondo model, 'n eenvoudige gekondenseerde materie model van 'n magnetiese onreinheid wat sterk koppel aan 'n see van elektrone. Dit vereis tegnieke van numeriese relatiwiteit en laat ons toe om die reaksie van die stelsel te bepaal na 'n vinnige sprong in die koppeling. Hierdie verhandeling is gebaseer op die werk wat die skrywer tydens 'n PhD program onder die toesig van PD Dr JK Erdmenger by die Max Planck-Institut-für Physik in München, Duitsland vanaf Augustus 2011 tot Mei 2014 gedoen het. Die toespaslike publikasies is: [1] M. Ammon, J. Erdmenger, P. Kerner, and M. Strydom, “Black Hole Instability Induced by a Magnetic Field,” Phys.Lett. B706 (2011) 94–99, arXiv:1106.4551 [hep-th], [2] Y.-Y. Bu, J. Erdmenger, J. P. Shock, and M. Strydom, “Magnetic field induced lattice ground states from holography,” JHEP 1303 (2013) 165, arXiv:1210.6669 [hep-th].
Heinbockel, Raffaela Esther. "Gravity and magnetic investigations along the Peruvian Continental Margin." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=966322665.
Full textBadinger, Harald, and Cuaresma Jesus Crespo. "Aggregravity: estimating gravity models from aggregate data." Taylor & Francis, 2015. http://dx.doi.org/10.1080/00036846.2014.1002903.
Full textBadinger, Harald, and Cuaresma Jesus Crespo. "Aggregravity: Estimating Gravity Models from Aggregate Data." WU Vienna University of Economics and Business, 2014. http://epub.wu.ac.at/4295/1/wp183.pdf.
Full textSeries: Department of Economics Working Paper Series
Hollis, Pierre G. "An improved Magnetic, Angle rate, Gravity (MARG) body tracking system." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA397552.
Full textThesis advisors, Xiaoping Yun, Sherif Michael, Eric R. Bachmann. Includes bibliographical references (p. 53-54). Also Available online.
Lewis, Andrew M. "A gravity and magnetic investigation of the Monarto granite, S.A /." Title page, abstract and contents only, 1985. http://web4.library.adelaide.edu.au/theses/09SB/09sbl673.pdf.
Full textMaltezou, F. "Gravity and magnetic studies of the Rhodope region, NE Greece." Thesis, University of Southampton, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375676.
Full textVan, Loon Jasper. "Functional and stochastic modelling of satellite gravity data /." Delft : NCG Nederlandse Commissie voor Geodesie, 2008. http://opac.nebis.ch/cgi-bin/showAbstract.pl?u20=9789061323075.
Full textWright, Corwin. "Detection of stratospheric gravity waves using HIRDLS data." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:ef4aa65d-67c1-43ac-90de-1b5bda6c8230.
Full textSchwartz, Vegar. "Greenland ice mass balance using GRACE gravity data." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-24543.
Full textRaizner, Carina. "GOCE data and gravity field model filter comparison." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2007. http://nbn-resolving.de/urn:nbn:de:bsz:93-opus-34036.
Full textLewi, Elias. "Modelling and inversion of high precision gravity data /." München : Bayerische Akademie der Wissenschaften, 1997. http://catalogue.bnf.fr/ark:/12148/cb409231411.
Full textBudiman, Indra. "Interpretation of gravity data over central Jawa, Indonesia /." Title page, contents and abstract only, 1991. http://web4.library.adelaide.edu.au/theses/09SM/09smb927.pdf.
Full textBerry, Christopher P. L. "Exploring gravity." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/245139.
Full textStrydom, Migael [Verfasser], and Johanna [Akademischer Betreuer] Erdmenger. "Magnetic vortices in gauge/gravity duality / Migael Strydom. Betreuer: Johanna Erdmenger." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1055907580/34.
Full textHortner, Sergio. "Investigations on electric-magnetic duality in gravity and higher spin theories." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/217796.
Full textOption Physique du Doctorat en Sciences
info:eu-repo/semantics/nonPublished
Jiang, Xiaodian. "Lithospheric deformations in Central Asia, derived from gravity data." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973285567.
Full textJoodaki, Gholamreza. "Earth Mass Change Tracking Using GRACE Satellite Gravity Data." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for bygg, anlegg og transport, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-23969.
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[Verfasser], Jirigalatu. "Processing and Inversion of Airborne Gravity Gradient Data / Jirigalatu." Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1167236858/34.
Full textLeSage, James P., and Manfred M. Fischer. "Conventional versus network dependence panel data gravity model specifications." WU Vienna University of Economics and Business, 2019. http://epub.wu.ac.at/6828/1/2019%2D2%2D11_v12_panel_gravity_model.pdf.
Full textSeries: Working Papers in Regional Science
Kim, Jeong-Hee. "Improved recovery of gravity anomalies from dense altimeter data /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487862399447755.
Full textHussein, Musa Jad. "Integrated and comparative geophysical studies of crustal structure of pull-apart basins the Salton Trough and Death Valley, California regions /." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
Full textHegmann, Mary Jane. "Gravity and magnetic surveys over the Santa Rita Fault System, southeastern Arizona." Thesis, The University of Arizona, 1998. http://hdl.handle.net/10150/278675.
Full textLi, Jinwen. "Detailed marine gravity field determination by combination of heterogeneous data." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq20874.pdf.
Full textWu, Liming. "Spectral methods for post processing of airborne vector gravity data." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq20889.pdf.
Full textFonseka, Chrishan. "Evaluation of airborne and marine gravity data over Kattegat region." Thesis, Högskolan i Gävle, Samhällsbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-34204.
Full textJones, Jonathan A. "Nuclear magnetic resonance data processing methods." Thesis, University of Oxford, 1992. http://ora.ox.ac.uk/objects/uuid:7df97c9a-4e65-4c10-83eb-dfaccfdccefe.
Full textHeliani, Leni Sophia. "Determination of the Indonesian gravity fields from combination of surface gravity, satellite altimeter and digital terrain model data." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/149084.
Full textRoberts, Clive Lynton. "Tertiary and Carboniferous magmatism around Lundy Island and the outer Bristol Channel : a geophysical and geochemical perspective." Thesis, Open University, 1997. http://oro.open.ac.uk/54615/.
Full textKennedy, Jeffrey, Ty P. A. Ferré, and Benjamin Creutzfeldt. "Time-lapse gravity data for monitoring and modeling artificial recharge through a thick unsaturated zone." AMER GEOPHYSICAL UNION, 2016. http://hdl.handle.net/10150/622148.
Full textSkladzien, Phillip. "Modelling gravity data in the eastern Tantanoola Trough, Otway Basin, Victoria /." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09SB/09sbs6287.pdf.
Full textKamarudin, Md Nor. "Local geoid determination from a combination of gravity and GPS data." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363535.
Full textYamamoto, Keiko. "Study on regional scale mass variation using GRACE satellite gravity data." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/59309.
Full textGregotski, Mark Edward. "Fractal stochastic modelling of airborne magnetic data." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74300.
Full textFrom a data modelling viewpoint, the magnetic measurements are derived from a linear superposition of a deterministic system function and a stochastic excitation process. A symmetric operator corresponds to the system function, and the near-surface magnetic source distribution represents the excitation process. The deconvolution procedure assumes an autoregressive (AR) system function and proceeds iteratively using bi-directional AR (BDAR) filtering in one dimension, which is extended to four-pass AR filtering in two dimensions. The traditional assumption of a spectrally white innovation is used in the deconvolution procedure. The data are modified prior to deconvolution by a Fourier domain prewhitening technique, to account for the long wavelength content of the fractal innovation. Deconvolution of the modified data produces the system function, which is removed from the original data to produce the near-surface magnetic source distribution. This distribution serves as a susceptibility map which can be used for enhancing magnetic field anomalies and geological mapping. Thus, the statistical descriptions of near-surface magnetic sources are useful for modelling airborne magnetic data in "shield-type" geologic environments.
Bance, Simon G. "Data storage and processing using magnetic nanowires." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505475.
Full textAcosta, Mena Dionisio M. "Statistical classification of magnetic resonance imaging data." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390913.
Full textAbtahi, Sayyed Mohammad. "Airborne Gravity Gradient, Magnetic and VLF datasets : Case studies of modelling, inversion and interpretation." Doctoral thesis, Uppsala universitet, Geofysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300126.
Full textHuo, Yunlong. "Finite element modeling of internal flow and stability of droplets levitated in electric and magnetic fields." Online access for everyone, 2005. http://www.dissertations.wsu.edu/Dissertations/Summer2005/y%5Fhuo%5F083005.pdf.
Full textBae, Jungmok. "A data storage system based on patterned magnetic media and magnetic force microscopy." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/46281.
Full textIncludes bibliographical references (p. 145-154).
In recent years, there are increasing demands for the high performance data storage systems. Periodic arrays of nanostructured magnetic pillars have been proposed as a patterned medium for high density data storage. In patterned media, each single domain magnetic pillar is used to store one bit of data. This media can theoretically provide an extremely high recording density. A writing method, based on the point magnetic recording scheme, is suggested and tested experimentally in this thesis. By using this method, a recording density of as high as 16 Gbits/in2 can be achieved with this perpendicular patterned media. The point magnetic recording (PMR) is based on the magnetic force microscopy (MFM). In this scheme, the MFM tip comes in contact with the sample and the magnetic field is applied by an external coil. The resulting magnetic field, concentrated near the tip, is used in the writing process. The exact writing field used in PMR process was experimentally measured and verified by simulation using a commercial magnetostatic simulation tool. By using this method, the important properties of the patterned media were studied. First, the switching field, defined as the external field at which a pillar reverses its magnetization, was measured. The curling mode model agreed well with the experimental data obtained from the Ni pillars of 90 nm in diameter and 180 nm in height. The samples used in the measurement were fabricated using lithography and electroplating with magnetic materials such as Ni and Co. The average switching field was 420 Oe but a high non-uniformity, ranging from 200 Oe to 700 Oe was observed. Secondly, the interaction field between the pillars was studied. For the first time, we measured the interaction field directly from pillars with spacing as small as 200 nm using the PMR method. Corresponding results were generated using a model based on the dipole approximation and compared with the experimental data. A good agreement was obtained. This thesis, also, discusses some of the system level issues including the design related to the high data rate and the tracking of the individual bits for precise positioning of the head during the writing process.
by Jungmok Bae.
Ph.D.
De, La Torre Giorgio Michele. "The crustal structure of Carnegie Ridge inferred from gravity and seismic data." Texas A&M University, 2003. http://hdl.handle.net/1969.1/2437.
Full textAndrews, Stuart Bruce. "Modelling time-varying gravity fields from Level-1B GRACE data using mascons." Thesis, University of Newcastle upon Tyne, 2015. http://hdl.handle.net/10443/3039.
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