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Dissertations / Theses on the topic 'Integrated magnetics'

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1

Araghchini, Mohammad. "(MEMS) toroidal magnetics for integrated power electronics." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/84882.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 237-241).<br>Power electronics represent a key technology for improving the functionality and performance, and reducing the energy consumption of many systems. However, the size, cost, and performance constraints of conventional power electronics currently limit their use. This is especially true in relatively high-voltage, low-power applications such as off-line power supplies, light-emit
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2

Chen, Wei. "Low Voltage High Current Power Conversion with Integrated Magnetics." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30518.

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Very low voltage, high current output requirement have necessitated improvements in power supply's density and efficiency. Existing power conversion techniques cannot meet very stringent size and efficiency requirements. By applying the proposed magnetic integration procedure, new integrated magnetic circuits featuring low loss, simple structure, and ripple cancellation technique are then developed to overcome the limitations of prior art. Both cores and windings are integrated. Consequently, the power loss and the size of the integrated magnetic device are greatly reduced. Detailed analysis
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3

Reusch, David Clayton. "High Frequency, High Current Integrated Magnetics Design and Analysis." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/35420.

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The use of computers in the modern world has become prevalent in all aspects of life. The size of these machines has decreased dramatically while the capability has increased exponentially. A special DC-DC converter called a VRM (Voltage Regulator Module) is used to power these machines. The VRM faces the task of supplying high current and high di/dt to the microprocessor while maintaining a tight load regulation. As computers have advanced, so have the VRM's used to power them. Increasing the current and di/dt of the VRM to keep up with the increasing demands of the microprocessor does n
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4

zhou, hua. "MAGNETICS DESIGN FOR HIGH CURRENT LOW VOLTAGE DC/DC CONVERTER." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3381.

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With the increasing demand for small and cost efficient DC/DC converters, the power converters are expected to operate with high efficiency. Magnetics components design is one of the biggest challenges in achieving the higher power density and higher efficiency due to the significant portion of magnetics components volume in the whole power system. At the same time, most of the experimental phenomena are related to the magnetics components. So, good magnetics components design is one of the key issues to implement low voltage high current DC/DC converter. Planar technology has many advantages.
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5

Garcha, Preetinder(Preetinder Kaur). "Low power circuits with integrated magnetics for sensors and energy harvesting systems." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/127019.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, May, 2020<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (pages 145-151).<br>The continued expansion of Internet of Things has led to a proliferation of wireless sensors and systems across the globe. The application space for sensors is wide-ranging: from industries, to serve the upcoming era of Industry 4.0, to consumer products, like body wearable sensors. The rise to billions of sensors relies on two key trends in sensor systems: miniaturiza
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6

Sterk, Douglas Richard. "Compact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectification." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9648.

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In the early 1990's, with the boom of the Internet and the advancements in telecommunications, the demand for high-speed communications systems has reached every corner of the world in forms such as, phone exchanges, the internet servers, routers, and all other types of telecommunication systems. These communication systems demand more data computing, storage, and retrieval capabilities at higher speeds, these demands place a great strain on the power system. To lessen this strain, the existing power architecture must be optimized. With the arrival of the age of high speed and power hungry mi
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7

Li, Bin. "High Frequency Bi-directional DC/DC Converter with Integrated Magnetics for Battery Charger Application." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/97874.

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Due to the concerns regarding increasing fuel cost and air pollution, plug-in electric vehicles (PEVs) are drawing more and more attention. PEVs have a rechargeable battery that can be restored to full charge by plugging to an external electrical source. However, the commercialization of the PEV is impeded by the demands of a lightweight, compact, yet efficient on-board charger system. Since the state-of-the-art Level 2 on-board charger products are largely silicon (Si)-based, they operate at less than 100 kHz switching frequency, resulting in a low power density at 3-12 W/in3, as well as an e
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8

Hsiu, Leng-nien. "Low ripple and noise DC/DC converter with quasi-resonant switching and integrated magnetics." Diss., The University of Arizona, 1995. http://hdl.handle.net/10150/187413.

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A low output ripple and noise converter is achieved by employing a zero-voltage switch (ZVS), an integrated magnetics structure which couples a transformer and several coupled inductors in one core, and several auxiliary packaging designs. In the steady-state analysis, the operation of ZVS converter is described and the ZVS switch resonant component design procedure is developed. An optimized geometrical core constant integrated magnetics design procedure is proposed. Some auxiliary packaging design considerations are addressed. The converter ac analysis is divided into two parts to observe th
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9

Xu, Peng. "Multiphase Voltage Regulator Modules with Magnetic Integration to Power Microprocessors." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/26395.

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Advances in very large scale integration (VLSI) technologies impose challenges for voltage regulator modules (VRM) to deliver high-quality power to modern microprocessors. As an enabling technology, multiphase converters have become the standard practice in VRM industry. The primary objectives of this dissertation are to develop advanced topologies and innovative integrated magnetics for high-efficiency, high-power-density and fast-transient VRMs. The optimization of multiphase VRMs has also been addressed. Todayâ s multiphase VRMs are almost universally based on the buck topology. With incre
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10

Cai, Yinsong. "Optimal Design of MHz LLC Converter for 48V Bus Converter Application." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/93582.

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The intermediate bus architecture employing the 48V bus converter is one of the most popular power architecture. 48V to 12V bus converter has wide applications in telecommunications, networks, aerospace, and military, etc. However, today's state of the art products has low power rating or power density and becomes difficult to satisfy the demand of increasing power of the loads. To improve the current design, a GaN (Gallium Nitride) based two-stage solution is proposed for the bus converter. The first stage Buck converter regulates the 40V to 60V variable input to a fixed 36V bus voltage. The
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11

Hernandez, Orlando. "Tectonic analysis of northwestern South America from integrated satellite, airborne and surface potential field anomalies." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1158512351.

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12

Nuttall, Daniel Robert. "Advanced high frequency switched-mode power supply techniques and applications." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/advanced-high-frequency-switchedmode-power-supply-techniques-and-applications(5792cb86-58e3-488b-b27e-559c18e55250).html.

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This Thesis examines the operation and dynamic performance of a single-stage, single-switch power factor corrector, S4 PFC, with an integrated magnetic device, IM. Also detailed isthe development and analysis of a high power light emitting diode, HP LED, power factorcorrection converter and proposed voltage regulation band control approach.The S4 PFC consists of a cascaded discontinuous current mode, DCM, boost stage anda continuous current mode, CCM, forward converter. The S4 PFC achieves a high powerfactor, low input current harmonics and a regulated voltage output, utilising a singleMOSFET.
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13

LI, QUAN, and q. li@cqu edu au. "HIGH FREQUENCY TRANSFORMER LINKED CONVERTERS FOR PHOTOVOLTAIC APPLICATIONS." Central Queensland University. N/A, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060830.110106.

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This thesis examines converter topologies suitable for Module Integrated Converters (MICs) in grid interactive photovoltaic (PV) systems, and makes a contribution to the development of the MIC topologies based on the two-inductor boost converter, which has received less research interest than other well known converters. The thesis provides a detailed analysis of the resonant two-inductor boost converter in the MIC implementations with intermediate constant DC links. Under variable frequency control, this converter is able to operate with a variable DC gain while maintaining the resonant condi
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14

Ježek, Jaroslav. "Fluxmetr s grafickým zobrazením B-H křivky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218264.

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This work deals with simple fluxmeter which is able, together with other device, to show hysteresis loop. Hysteresis loop is a graphic expression of dependence of magnetic induction on intensity of magnetic field. Oscilloscope is used to display the hysteresis loop. This device is fully sufficient for the display. The measured objects are solenoids from various kinds of materials with the same shape. The main aim of this work is the design, realization and description of the fluxmeter. The fluxmeter consists of several partial blocks. The first one, on which this work is focused, is signal gen
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15

Betschon, Felix. "Design principles of integrated magnetic bearings /." Zürich, 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13643.

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16

Hussaini, Sheena. "Integrated Magnetic Components for RF Applications." Wright State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=wright1431951933.

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17

Oxland, Richard K. "An HBT magnetic sensor with integrated 3-dimensional magnetic structures." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/858/.

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The applicability and functionality of high frequency digital and millimetre wave circuits can be enhanced by the integration of sensor elements into the circuits. It is furthermore advantageous to utilise or modify the pre–existing fabrication process flow in creating this added functionality. This thesis describes a work on magnetic field sensors based on an InP/InGaAs heterojunction bipolar transistor (HBT) which has been fabricated to be compatible with high frequency epilayer structure and processes. In this work, the complete fabrication process for the HBT magnetic sensors has been deve
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18

Ahn, Chong Hyuk. "Micromachined components as integrated inductors and magnetic microactuators." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/15367.

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19

Wang, Shen. "Modeling and Design of Planar Integrated Magnetic Components." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/34400.

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Recently planar magnetic technologies have been widely used in power electronics, due to good cooling and ease of fabrication. High frequency operation of magnetic components is a key to achieve high power density and miniaturization. However, at high frequencies, skin and proximity effect losses in the planar windings become significant, and parasitics cannot be ignored. This piece of work deals with the modeling and design of planar integrated magnetic component for power electronics applications. First, one-dimensional eddy current analysis in some simple winding strategies is discussed
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20

Camarda, Antonio <1984&gt. "Microelectronic Design with Integrated Magnetic and Piezoelectric Structures." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7603/1/Camarda_Antonio_tesi.pdf.

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This thesis investigates the possibility of integrating the standard CMOS design process with additional microstructures enhancing circuit functionalities. More specifically, the thesis faces the problem of miniaturization of magnetic and piezoelectric devices mostly focused on the application field of EH (Energy Harvesting) systems and ultra-low power and ultra-low voltage systems. It shows all the most critical aspects which have to be taken into account during the design process of miniaturized inductors for PwrSoC (Power System on Chip) or transformers. Furthermore it shows that it is po
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21

Camarda, Antonio <1984&gt. "Microelectronic Design with Integrated Magnetic and Piezoelectric Structures." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7603/.

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This thesis investigates the possibility of integrating the standard CMOS design process with additional microstructures enhancing circuit functionalities. More specifically, the thesis faces the problem of miniaturization of magnetic and piezoelectric devices mostly focused on the application field of EH (Energy Harvesting) systems and ultra-low power and ultra-low voltage systems. It shows all the most critical aspects which have to be taken into account during the design process of miniaturized inductors for PwrSoC (Power System on Chip) or transformers. Furthermore it shows that it is po
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22

CHOI, JIN-WOO. "MAGNETIC PARTICLE SEPARATORS AND INTEGRATED BIOFILTERS FOR MAGNETIC BEAD-BASED BIOCHEMICAL DETECTION SYSTEM." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin990796344.

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23

Guo, Wei. "Compact modeling of magnetic tunnel junctions and design of hybrid CMOS-magnetic integrated circuits." Grenoble INPG, 2010. http://www.theses.fr/2010INPG0126.

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Le but de cette thèse était d’évaluer les performances de circuits logiques combinant des composants CMOS classiques et des composants magnétiques. Les jonctions tunnel magnétiques sont bien connues comme éléments de base des mémoires magnétiques. Mais l’utilisation de ces composants non-volatiles peut également permettre de repousser certaines limites de la microélectronique actuelle, notamment en contribuant à diminuer la consommation, les problèmes de dissipation thermique, en améliorant la fiabilité des circuits et en apportant de nouvelles fonctionnalités. Cette thèse a consisté en deux p
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24

Li, Liangliang. "Nanogranular soft magnetic material and on-package integrated inductors /." May be available electronically:, 2007. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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25

Nathan, Kumaran Saenthan. "A novel DC-DC converter for photovoltaic applications." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288881.

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Growing concerns about climate change have led to the world experiencing an unprecedented push towards renewable energy. Economic drivers and government policies mean that small, distributed forms of generation, like solar photovoltaics, will play a large role in our transition to a clean energy future. In this thesis, a novel DC-DC converter known as the Coupled Inductors Combined Cuk-SEPIC' (CI-CCS) converter is explored, which is particularly attractive for these photovoltaic applications. A topological modification is investigated which provides several benefits, including increased power
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26

Syed, Azeemuddin. "Permalloy magnetic domain control for radio frequency integrated circuit applications /." Available to subscribers only, 2005. http://proquest.umi.com/pqdweb?did=1079666501&sid=10&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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27

Park, Jae Yeong. "Packaging-compatible micromachined magnetic devices : integrated passive components and modules." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/16385.

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28

Kiermaier, Josef [Verfasser]. "Integrated Nanomagnetic Logic System in Perpendicular Magnetic Media / Josef Kiermaier." Aachen : Shaker, 2014. http://d-nb.info/1049380894/34.

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29

Yu, Xuehong. "Silicon-embedded magnetic components for on-chip integrated power applications." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54243.

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The objective of the proposed research is to design, fabricate, characterize and test silicon-embedded magnetic components for on-chip integrated power applications. Driven by the trend towards continued system multi-functionality and miniaturization, MEMS technology can be used to enable fabrication of three-dimensional (3-D) functional devices into the silicon bulk, taking advantage of the 'dead volume' in the substrate and achieving a greater level of miniaturization and integration. As an example, one of the challenges in realizing ultra-compact high-frequency power converters lies in the
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30

Hartman, Gregory. "Monolithically integrated non-reciprocal devices based on magnetic thin films." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1369095798.

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31

Zhang, Tong. "An integrated framework for magnetic resonance image reconstruction and segmentation." Thesis, The University of Sydney, 2016. http://hdl.handle.net/2123/15457.

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As a non-invasive tomographic imaging technology, magnetic resonance imaging (MRI) has revolutionized the diagnostic imaging industry. Due to its relatively high resolution and superior soft-tissue contrast, MRI has been widely used for human health monitoring, disease diagnosis, and clinical research. The traditional medical imaging technologies aim to reconstruct the image from measured signals for visualisation of the inside body. However, the reconstructed image is just a foundation for disease diagnosis and/or health assessment of the patient, which will be subsequently interpreted and an
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32

Stegen, Sascha. "Development of an Integrated Magnetic System Assisted by Electromagnetic Simulation." Thesis, Griffith University, 2012. http://hdl.handle.net/10072/365703.

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In DC/DC converter systems, power electronic circuits are reaching switching efficiencies close to 100 percent nowadays. Thus, most of the energy loss appears inside the passive magnetic circuit of the converter, which at the same time is the component that requires most space in the system. In order to battle this issue, research during the last century has been focused on planarization, hybridization and integration techniques with the goal to achieve higher efficiencies and decrease the profile and volume of the devices. In addition, higher frequencies have been applied to achieve a higher
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33

Chan, Wai-san. "Design and analysis of integrated computational imaging systems." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38960357.

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34

Cooper, A. R. "An integrated approach to silicon transducers : magnetic field as an example." Thesis, University of Southampton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356052.

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35

Sathe, Tushar R. "Integrated Magnetic and Optical Nanotechnology for Early Cancer Detection and Monitoring." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19868.

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Despite significant developments in imaging modalities and therapeutics, cancer mortality rates remain unchanged. Detecting cancer before it has spread to other organs improves patient outcome dramatically. Therefore, greater emphasis must be placed on developing novel technology for early cancer detection and disease monitoring. Nanometer-sized materials have unique optoelectronic and magnetic properties. In particular, semiconductor quantum dots (QD) are a new class of fluorophores that are bright, photostable, and can be simultaneously excited to emit different wavelengths of light. Magneti
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36

Bowers, Brian J. (Brian Jeffrey). "Integrated cryogenic refrigeration system design for superconducting magnetic energy storage systems." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42681.

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37

Hardy, M. J. "Integrated surface plasmon generator for application in heat assisted magnetic recording." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676510.

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Presented here is a novel design for a vertical cavity surface emitting laser for supplying heat to a recording medium in a magnetic recording drive, in an attempt to overcome the superparamagnetic limit. Included in the thesis is a discussion of the requirement for a system to focus energy beyond the diffraction limit and onto a recording platter. Plasmonics is introduced as a method to achieve this focusing and the structure to be used in this work is presented. Initial modelling of the structure for a theoretical efficiency and hence feasibility of the design is then conducted. Fabrication
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38

Ayhan, Mustafa Tufan. "Design And Implementation Of Coupled Inductor Cuk Converter Operating In Continuous Conduction Mode." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613927/index.pdf.

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The study involves the following stages: First, coupled-inductor and integrated magnetic structure used in Cuk converter circuit topologies are analyzed and the necessary information about these elements in circuit design is gathered. Also, benefits of using these magnetic elements are presented. Secondly<br>steady-state model, dynamic model and transfer functions of coupled-inductor Cuk converter topology are obtained via state-space averaging method. Third stage deals with determining the design criteria to be fulfilled by the implemented circuit. The selection of the circuit components and
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39

Jones, Hannah Amy. "Sediments in urbanised river catchments : an integrated sedimentological and magnetic mineral approach." Thesis, Manchester Metropolitan University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412634.

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40

Mukherjee, Sankha S. "Realization of CoFeB/MgO/CoFeB magnetic tunnel junction devices through materials analysis, process integration and circuit simulation /." Online version of thesis, 2009. http://hdl.handle.net/1850/11336.

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41

Taylor, John-Philip. "Integrated, FPGA based NMR teslameter and power supply for accelerator magnets /." Link to the online version, 2007. http://hdl.handle.net/10019/470.

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42

Chan, Wai-san, and 陳慧珊. "Design and analysis of integrated computational imaging systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38960357.

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43

Tobgay, Sonam. "Novel concepts for RF surface coils with integrated receivers." Link to electronic thesis, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-0419104-141545.

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44

Topal, Tankut. "A Labview Interface To Integrate Magnetic Resonance Imaging (mri) Simulator With System Control And Its Application To Regional Magnetic Resonance Electrical Impedance Tomography (mreit) Reconstruction." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612246/index.pdf.

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Magnetic resonance imaging (MRI) is a high resolution medical imaging technique based on distinguishing tissues according to their nuclear magnetic properties. Magnetic resonance electrical impedance tomography (MREIT) is a conductivity imaging technique which reconstructs images of electrical properties, based on their effect on induced magnetic flux density due to externally applied current flow. Both of these techniques are of interest for novel research and development. Simulators help researchers observe the accuracy and the results of the study. In this study a user friendly complete MR
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Andersson, Magnus. "3D Structure and Emplacement of the Alnö Alkaline and Carbonatite Complex, Sweden : Integrated Geophysical and Physical Property Investigations." Doctoral thesis, Uppsala universitet, Geofysik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-248113.

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Carbonatites are carbonate-rich magmatic rocks that are rare and of great relevance for our understanding of crustal and mantle processes. Although found on all continents and in settings ranging from Archaean to present-day, their deeper plumbing system is still poorly understood. Therefore, the main goal of this thesis is to broaden the existing knowledge of carbonatite systems, often limited to surface geological observations, by providing depth constraints using a number of geophysical methods and petrophysical measurements. The Alnö alkaline and carbonatite complex in central Sweden was c
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Chai, Joshua Tian-Yun. "Integrated characterisation of carotid atherosclerosis : from magnetic resonance imaging to plaque macrophage profiling." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:3c3ca86b-8abf-4b3e-b2a2-d59a3ab604a4.

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Cardiovascular morbidity and mortality remain the most serious global public health challenge. With the evolution in global socio-economic activities and the associated lifestyle changes, there is an impending epidemic of obesity, insulin resistance, metabolic syndrome, and diabetes mellitus, all of which fuel premature coronary artery disease and stroke. In the post-statin era, despite considerable efforts in anti-atherosclerotic drug development, a significant number of these potential compounds with initial success in early phase clinical studies failed to translate to clinical outcome bene
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47

Shihadeh, Fadi Easa. "Optimized and integrated alignment system for functional proton radiosurgery." CSUSB ScholarWorks, 2007. https://scholarworks.lib.csusb.edu/etd-project/3258.

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In this thesis work, a system for proton beam alignment was studied and optimized in many of its functional areas. The resulting system was named Positioning Alignment Control System (PACS). The PACS system is an integrated and efficient system as a result of the work done on it in the course of this thesis work.
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48

Pandharpure, Shrinivas. "Process development for integration of CoFeB/MgO-based magnetic tunnel junction (MTJ) device on silicon /." Online version of thesis, 2007. http://hdl.handle.net/1850/5060.

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49

Taylor, John-Philip. "Integrated, FPGA Based NMR Teslameter and power supply for accelerator magnets." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/2308.

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Thesis (MScEng (Electrical and Electronic Engineering))--Stellenbosch University, 2007.<br>Particle accelerators today have numerous magnets that require controlling. These include magnets for analysing, beam-path selection, focusing, etc. Also, design specifications are becoming tighter. A typical modern magnet power supply is expected to have a resolution of 16-bit and a stability of 10 ppm. This thesis addresses two research areas. First, various aspects of high-performance accelerator magnet power supplies are investigated. An isolated dual-stage 3.5 kW converter is designed. The con
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Sanchez, Antequera Yolanda. "Magselectofection: A novel integrated technology of magnetic separation and genetic modification of target cells." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-127469.

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