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Thèses sur le sujet « Isolated electrons »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

DI, MATTEO LEONARDO. "CMS ECAL intercalibration with electrons from W and Z decays and Search for the Standard Model Higgs boson in the H > WW > lvqq channel with the CMS detector." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/41813.

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The usage of isolated electrons from W and Z leptonic decays for the intercalibration of the CMS ECAL single channel response is described. The statistics of 5 fb−1, collected at LHC in 2011 at sqrt(s)=7 TeV, allowed to reach a statistical precision of about 1% in the central part of the ECAL barrel and about 4% in the ECAL endcaps. The results obtained with this method are combined with others, and the impact on the Higgs to di-photon search is shown. Subsequently, the thesis describes the search strategy for the Higgs boson in the H > WW > lvqq final state. The results are based on a data

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Simpson, Edward Thomas. "Electron holography of isolated and interacting magnetic nanocrystals." Thesis, University of Cambridge, 2009. https://www.repository.cam.ac.uk/handle/1810/252128.

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Fuller, G. W. "Electron microscopy and image analysis of isolated myosin filaments." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38322.

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4

Archer, Anthony D. "Spectroscopic studies of field-induced electron emission from isolated microstructures." Thesis, Aston University, 1992. http://publications.aston.ac.uk/8241/.

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A detailed investigation has been undertaken into the field induced electron emission (FIEE) mechanism that occurs at microscopically localised `sites' on uncoated and dielectric coated metallic electrodes. These processes have been investigated using two dedicated experimental systems that were developed for this study. The first is a novel combined photo/field emission microscope, which employs a UV source to stimulate photo-electrons from the sample surface in order to generate a topographical image. This system utilises an electrostatic lens column to provide identical optical properties u

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5

McKinley, A. J. "A study of matrix isolated ions by electron spin resonance spectroscopy." Thesis, University of Canterbury. Chemistry, 1985. http://hdl.handle.net/10092/9393.

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The objective of this project was to attempt to trap small molecular ions in an argon matrix and study the structure of these ions using electron spin resonance spectroscopy. To this end an apparatus designed for matrix isolation ESR was developed in a number of stages concurrently with matrix isolation experiments. Early experiments used conventional electron impact ion sources but these sources were found to be unsuitable for producing ions to trap in an argon matrix due to the energy of the ions. In these experiments problems arose due to contamination of the matrix by methyl radicals and

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York, Jr John Benson. "An Isolated Micro-Converter for Next-Generation Photovoltaic Infrastructure." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19326.

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Photovoltaic (PV) systems are a rapidly growing segment in the renewable energy industry. Though they have humble origins and an uncertain future, the commercial viability of PV has significantly increased, especially in the past decade. In order to make PV useful, however, significant effort has to go into the power conditioning systems that take the low-voltage dc from the panel and create utility compatible ac output. Popular architectures for this process include the centralized inverter and the distributed micro-inverter, each with its own advantages and disadvantages. One attempt to

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7

Stetler, Fredrik. "Isolated magnetic field structures in the Saturn magnetosphere." Thesis, KTH, Rymd- och plasmafysik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-214821.

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This report’s primary focus is to use the data gathered by the Cassini satellite and analyzeits magnetic field data around Saturn. By looking for isolated changes in magneticfield values locations of potential plasmoids can be determined and examined. Theseso called plasmoids are pockets of higher density plasma ,associated with an increaseor decrease of the magnetic field strength, inside the magnetosheath, which may be importantfor the interaction between the solar wind plasma and the magnetosphere. Thestudy has been made over 7 years, from the beginning of 2010 to the end of 2016. Duringthi

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Jayanty, Vivi. "Miniaturized electron-impact-ionization pumps using double-gated isolated vertically aligned carbon nanotube arrays." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/75659.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 67-71).<br>There is a need for microscale vacuum pumps that can be readily integrated with other MEMS and electronic components at the chip-scale level. Miniaturized ion pumps exhibit favorable scaling down because they are surface-limited and miniaturization increases the ratio between the active surface and the chamber volume, resulting in enhanced ionization and pump rates. Therefore, scaled-down

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Monzon, Eric V. "Seismic response of isolated bridge superstructure to incoherent ground motions." abstract and full text PDF (free order & download UNR users only), 2006. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1438943.

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Murdoch, Fiona. "Evaluation of a manganese oxidising bacterium isolated from an upland water source." Thesis, University of the West of Scotland, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311781.

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11

Truxal, Laura T. "Characterization of novel compounds isolated from Karenia brevis cultures." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-3/rp/truxall/lauratruxal.pdf.

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ANDERSON, SUSAN RAE. "MATRIX ISOLATED INFRARED SPECTROSCOPIC STUDY OF THE OXIDATION REACTION INTERMEDIATES OF ELECTRON DONORS BY CHROMYL CHLORIDE." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1001953834.

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13

Soon, John Long. "Fault-Tolerant Design and Implementation for Non-Isolated Reconfigurable DC/DC Converters." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/20266.

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This thesis mainly focuses on improving the conventional DC-DC converter topology by utilizing the redundancy concept (N+1) and fault-tolerant design to maintain an uninterrupted output operation even on primary switch failure. The proposed fault-tolerant converter (FTC) involves merging three configurations namely buck, boost and buck-boost to derive a new converter structure along with bidirectional capabilities. The proposed FTC is equipped with a single redundant switch and shared with one coupled inductor and one capacitor (1L-1C) to be capable of achieving the step-up and step-down opera

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Marais, Laurette Marlize. "Characterization of bacteria isolated from a platinum mine tailings dam / Laurette Marais." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8721.

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Contamination from various sources has a huge impact on soil health and microbial community composition. Metal contamination of soil in mining scenarios is of concern and is not adequately addressed, particularly with respect to the microbial community. The mining industry is one of the largest contributors to heavy metal contamination of soil in South Africa, especially since the country is one of the major mining countries in the world. Platinum mining is of special importance, since the largest percentage of the world’s reserves of platinum group metals are found and mined in South Africa.

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York, David J. "A novel magnetorheological fluid-elastomer vibration isolator /." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1448335.

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Thesis (M.S.)--University of Nevada, Reno, 2007.<br>"August, 2007." Includes bibliographical references (leaves 83-86). Online version available on the World Wide Web. Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2007]. 1 microfilm reel ; 35 mm.

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Roxlau, Elsa Tadele [Verfasser]. "Potential Effects of Electronic Cigarette Vapour on Isolated Lung Cells and in Mouse Lungs / Elsa Tadele Roxlau." Gießen : Universitätsbibliothek, 2020. http://d-nb.info/1223461718/34.

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17

Esmaeili, E., A. M. Rashidi, A. A. Khodadadi, Y. Mortazavi, and M. Rashidzadeh. "The Formation of the Intermetallic-Containing Pd2Sn Alloy: The Creation of the Isolated Adsorption Sites." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35214.

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In the current study, tin-promoted Pd / MWNTs synthesized via polyol process were developed. TEM images evidences resulted in the formation of highly-dispersed Pd-Sn nanoparticles. The formation of Pd2Sn structural phase was confirmed by XRD and TPR techniques, composed mainly of intermetallic spe-cies, supported by XPS results. In this research, we applied intermetallic-containing tin-promoted catalysts for the selective hydrogenation reaction of acetylene as the case study. The presence of a discontinuity in the Arrhenius plots could come from the kinetic factor as a result of change in acet

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18

Ayele, Mehari L. "Four-port miniaturized and highly isolated antenna for multiple-input multiple-output communication systems." Thesis, Wichita State University, 2012. http://hdl.handle.net/10057/6118.

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The objective of this paper is to present an efficient miniaturized antenna design and simulation of a highly isolated multi-port micro-strip antenna for multiple-input multiple-output communication (MIMO) systems. Three geometric configurations were proposed and compared to achieve an isolation of as low as –30 dB without affecting the antenna performance greatly. The antenna was designed to operate at a resonance frequency of 2.45 GHz (fc ). Ferrite material beneath each meander structure was used for miniaturization purposes as well as an FR4 substrate with a compact overall area of .75 lam

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Rasmussen, Andrew J. "Structural Insights into the Regulation of Electron Transfer in Nitrogenase, and Modulating the Reactivity of the Isolated Iron Molybdenum Cofactor." DigitalCommons@USU, 2016. https://digitalcommons.usu.edu/etd/4897.

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Nitrogenase, EC: 1.18.6.1 is the enzyme that catalyzes the reduction of dinitrogen to ammonia; this is known as biological nitrogen fixation. Nitrogen fixation is so important to our daily lives, that we utilize approximately 2% of the annual energy produced worldwide to fix nitrogen industrially via the Haber-Bosch process. The industrial process requires a high input of energy in the form of heat (>450°C) and pressure (>200 atm>), while the enzymatic system is performed under ambient conditions. Research invested into understanding the mechanism of this biological catalyst could eventually l

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Enomoto, Bruno Yukio. "Conversores DC-DC Dual-Active-Bridge isolados bidirecionais." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-17072018-092952/.

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Este trabalho visa o estudo das regiões de operação de conversores CC/CC isolados bidirecionais do tipo DAB (Dual Active Bridge). É feito um estudo do comportamento do circuito com a variação dos valores das reatâncias de acoplamento, avaliando-se aspectos como eficiência, fator de potência, reativos, entre outros. A seguir é proposta uma estrutura de controle que permite a operação com tensões nos barramentos DC diferentes das nominais, minimizando as correntes absorvidas. Além disso, propõe-se uma estratégia de controle para regular a potência transferida. O trabalho inclui modelagem teórica

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Maxwell, Erick N. "Ultra-wideband electronics, design methods, algorithms, and systems for dielectric spectroscopy of isolated B16 tumor cells in liquid medium." [Tampa, Fla] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002172.

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Rioux, Jean-Philippe. "Microbial activity of iron-reducing bacteria and sulfate-reducing bacteria isolated from mine tailings in the presence of various electron donors." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26757.

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Two abandoned mine tailings sites (Calumet near Ottawa, and Potter near Timmins, Ontario) have been shown to support active populations of iron- (IRB) and sulfate-reducing bacteria (SRB). The competition between IRB and SRB for similar electron donors was however never assessed. The present study looked into the potential competition between IRB and SRB isolated from those 2 sites since they represent different pH conditions and mineralogy. The Potter tailings are acidic to slightly acidic and contain large quantities of sulfides, whereas the Calumet tailings are alkaline and contain less pyri

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Banerjee, Sreetama [Verfasser], Dietrich R. T. [Akademischer Betreuer] Zahn, Dietrich R. T. [Gutachter] Zahn, and L. [Gutachter] Hueso. "HED-TIE: A wafer-scale approach for fabricating hybrid electronic devices with trench isolated electrodes and its application in sensing devices / Sreetama Banerjee ; Gutachter: Dietrich R. T. Zahn, L. Hueso ; Betreuer: Dietrich R. T. Zahn." Chemnitz : Technische Universität Chemnitz, 2019. http://d-nb.info/1215909853/34.

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Yadav, Anur. "Isolated Graphene Edge Nanoelectrodes: Fabrication, Selective Functionalization, and Electrochemical Sensing." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/23114.

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Diese Arbeit präsentiert eine einfache eine einfache, auf Photolithographie basierende Methode zur Darstellung einer isolierten Graphenkante (oder GrEdge) einer Monolage als Nanoelektrode auf einem isolierenden Substrat vorgestellt. Trotz ihrer Millimeter-Länge verhält sich die nur einen Nanometer breite GrEdge-Elektrode wie ein Nanodraht mit einem hohen Seitenverhältnis von 1000000 zu 1. Des Weiteren wird der Einsatz von elektrochemischer Modifikation (ECM) demonstriert, um die GrEdge selektiv mit Metall-Nanopartikeln und organischen Schichten nicht-kovalente oder kovalente zu funktionalisier

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Petersson, Magnus. "Microstrip Solutions for Innovative Microwave Feed Systems." Thesis, Linköping University, Department of Science and Technology, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1034.

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<p>This report is introduced with a presentation of fundamental electromagnetic theories, which have helped a lot in the achievement of methods for calculation and design of microstrip transmission lines and circulators. The used software for the work is also based on these theories. </p><p>General considerations when designing microstrip solutions, such as different types of transmission lines and circulators, are then presented. Especially the design steps for microstrip lines, which have been used in this project, are described. Discontinuities, like bends of microstrip lines, are treated a

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Griffith, Olga. "INSIGHT INTO THE ELECTRONIC PROPERTIES OF ORGANIC SEMICONDUCTORS: EXPERIMENTAL MEASURES FROM THE ISOLATED-MOLECULE LEVEL TO THE SOLID-STATE DEVICE LIMIT." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/195928.

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Fundamental understanding of the electronic properties, and charge transfer mechanism of organic semiconductors and functionalized oligoacenes in particular, is of great importance for the design and fabrication of organic electronic devices. This work is devoted to the study of the electronic properties of organic semiconductors in the gas, solution, and solid phases, thus providing insights into the intra- and intermolecular electronic interactions of these materials from the isolated-molecule level to the solid-state device limit. The organic semiconductors investigated in this work are bis

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Fridgen, Travis D. "FT-infrared spectroscopic and computational studies of the matrix-isolated products formed following gas-phase electron bombardment of rare-gas/organic molecule mixtures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0004/NQ38307.pdf.

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BOUET, VERONIQUE. "Interaction particules isolantes/electrode : mise en uvre de methodes electrochimiques. application aux revetements composites electrolytiques." Paris 6, 1994. http://www.theses.fr/1994PA066326.

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Cette etude concerne l'elaboration d'un nouveau type de materiaux composites constitues d'une matrice metallique contenant des inclusions liquides sous forme de microcapsules d'huile ou d'une solution aqueuse. Ils sont synthetises par electrodeposition a partir d'un bain electrolytique contenant les capsules en suspension. Le principal objet de ce travail est de developper une methode de detection du passage des capsules a proximite de la cathode, avant leur eventuelle incorporation. Une cellule a jet immerge a ete specialement concue pour controler parfaitement l'ecoulement parietal. Ses perf

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Gallardo, Angelo Miguel Asuncion. "Design and Construction of 1800W Modular Multiple Input Single Output Non-Isolated DC-DC Converters." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1739.

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This thesis report details the design and construction of non-isolated DC-DC converters to create a Multiple Input Single Output (MISO) converter for combining multiple renewable energy sources into one single output. This MISO uses the four-switch buck-boost topology to output a single 48V from multiple nominal 24V inputs. The MISO converter implements a modular approach to deliver 1800W output power. Each module in the MISO is rated at 600W and they share the output power equally. Hardware results show that the converter produces 1800W of output power from three sources with 96.4% efficiency

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Rocha, Leandro Seixas. "Estrutura eletrônica de isolantes topológicos em duas e três dimensões." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-16102014-092038/.

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Nessa tese de doutorado apresentamos um estudo da estrutura eletronica de materiais isolantes topologicos. A teoria fundamental dos isolantes topologicos foi abordada atraves de invariantes topologicos Z2, assim como os seus metodos para o calculo desses invariantes topologicos e as consequencias da topologia de bandas nao-trivial. Assim como as propriedades atomisticas e energeticas, as propriedades eletronicas de alguns isolantes topologicos foram calculadas atraves de metodos de primeiros principios baseados na Teoria do Funcional da Densidade. Apresentamos nessa tese o estudo de quatro sis

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Eleyele, Abidemi Oluremilekun. "Isolated Single-Stage Interleave Resonant PFC Rectifier with Active and Novel Passive Output Ripple Cancellation Circuit." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-423117.

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With the increasing demand for fast, cheaper, and efficient power converters come the need for a single-stage power factor correction (PFC) converter. Various single-stage PFC converter proposed in the literature has the drawback of high DC bus voltage at the input side and together with the shift to wide bandgap switches like GaN drives the converter cost higher. However, an interleaved topology with high-frequency isolation was proposed in this research work due to the drastic reduction in the DC bus voltage and extremely low input current ripple thereby making the need for an EMI filter cir

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Thiele, Stefan. "Read-out and coherent manipulation of an isolated nuclear spin using a single-molecule magnet spin-transistor." Phd thesis, Université de Grenoble, 2014. http://tel.archives-ouvertes.fr/tel-00984973.

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La réalisation d'un ordinateur quantique fonctionnel est l'un des objectifs tech- nologiques les plus ambitieux pour les scientifiques d'aujourd'hui. Sa brique de base est composée d'un système quantique à deux niveaux, appelé bit quantique (ou qubit). Parmi les différents concepts existants, les dispositifs à base de spin sont très attractifs car ils bénéficient de la progression constante des techniques de nanofabrication et permettent la lecture électrique de l'état du qubit. Dans ce contexte, les dispositifs à base de spins nucléaires offrent un temps de cohérence supérieur à celui des dis

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Souza, Jean Carlo 1993. "Estudos de ressonância de spin eletrônico (RSE) em isolantes topológicos dopados com terras-rara." [s.n.], 2017. http://repositorio.unicamp.br/jspui/handle/REPOSIP/326704.

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Orientador: Pascoal José Giglio Pagliuso<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-09-02T11:57:27Z (GMT). No. of bitstreams: 1 Souza_JeanCarlo_M.pdf: 4438731 bytes, checksum: aaba7a375b2b45b638619e944111c41b (MD5) Previous issue date: 2017<br>Resumo: A ideia de topologia na Física da Matéria da Condensada, apesar de ter surgido com o efeito Hall quântico inteiro, só voltou a ser explorada recentemente na busca de novas fases da matéria depois do surgimento dos Isolantes Topológicos (ITs) 2D. Após a pre

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Sal, y. Rosas Celi Damian. "Étude et conception de convertisseurs réversibles multi sources isolés pour l’interfaçage au réseau de sources d'énergies renouvelables et de moyens de stockage." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT024/document.

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Les accords internationaux pour la réduction des émissions polluantes dans l’environnement imposent l’insertion de plus en plus importante d’énergies renouvelables intermittentes dans le réseau électrique. De plus, l’intégration de dispositifs de stockage est envisagée dans les réseaux électriques du futur afin de résoudre le problème de l’intermittence et d’optimiser la consommation des utilisateurs. Cependant, du fait des caractéristiques différentes des signaux électriques mis en jeu (courant continu pour les sources renouvelables et les batteries, courant alternatif pour le réseau électriq

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Uehara, Vanessa Bernardo. "Efeito da radiação ionizante de feixe de elétrons em propriedades de biopolímeros comestíveis a base de proteína isolada de soja e fécula de mandioca." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-24072017-112750/.

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Nas últimas décadas, têm aumentado substancialmente a quantidade de pesquisas focando no desenvolvimento e caracterização de materiais biodegradáveis, particularmente, filmes comestíveis. O uso de polímeros de fontes renováveis, preparados a partir de produtos vegetais, vem ganhando importância nessa abordagem. O concentrado de proteína de soja e amido de mandioca podem ser considerados uma alternativa aos polímeros petroquímicos. O processamento pela radiação ionizante pode ser empregado para a modificação de polímeros e macromoléculas, resultando em novos materiais com grandes perspectivas d

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Kalbitz, René. "Stability of polarization in organic ferroelectric metal-insulator-semiconductor structures." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5727/.

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Organic thin film transistors (TFT) are an attractive option for low cost electronic applications and may be used for active matrix displays and for RFID applications. To extend the range of applications there is a need to develop and optimise the performance of non-volatile memory devices that are compatible with the solution-processing fabrication procedures used in plastic electronics. A possible candidate is an organic TFT incorporating the ferroelectric co-polymer poly(vinylidenefluoride-trifluoroethylene)(P(VDF-TrFE)) as the gate insulator. Dielectric measurements have been carried out o

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Souza, Aparecida Sonia de. "Efeitos da irradiação na composição e propriedades funcionais da soja." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256399.

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Orientador: Flavia Maria Netto<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-07T16:15:22Z (GMT). No. of bitstreams: 1 Souza_AparecidaSoniade_D.pdf: 1116607 bytes, checksum: 498527d5fa8ce5e4faecf37aa8409d46 (MD5) Previous issue date: 2006<br>Resumo: O presente trabalho teve como objetivo estudar os efeitos da irradiação e do tempo de armazenamento na composição química de grãos de soja e funcionais de seus isolados protéicos. Os grãos de soja foram divididos em quatro lotes, sendo que dois foram irradiados

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Grün, Mathias. "Les nanocristaux de silicium comme source de lumière : analyse optique et réalisation de microcavités." Thesis, Nancy 1, 2010. http://www.theses.fr/2010NAN10108/document.

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Ce travail de thèse concerne la réalisation et l'analyse des propriétés optiques de nanocristaux de silicium. Ces objets de taille nanométrique possèdent des propriétés optiques remarquables, en particulier de photoluminescence. Les propriétés de confinement quantique qui les caractérisent permettent d'obtenir un signal de luminescence intense dans le domaine du visible. Des composants optoélectroniques et photoniques ont été envisagés à base de nanocristaux de silicium. Les raisons physiques du fort signal de luminescence en revanche sont encore mal comprises. Les nanocristaux de silicium son

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Marçal, Nei. "Estudo da estrutura eletrônica e das propriedades ópticas de copolímeros formados por vinilenos e anéis de tiofeno." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277368.

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Orientador: Bernardo Laks<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin<br>Made available in DSpace on 2018-08-12T11:04:39Z (GMT). No. of bitstreams: 1 Marcal_Nei_D.pdf: 86929566 bytes, checksum: 04c8aa7c4176175d973ff0990de45bad (MD5) Previous issue date: 2008<br>Resumo: Antes da década de 70, todos os materiais poliméricos eram considerados como isolantes e suas aplicações tecnológicas levavam em conta esta característica. De lá para cá, uma nova classe desses materiais, os polímeros conjugados, determinaram uma nova forma de aplicação de sistema

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Esmail, Adam Ashiq. "Charge dynamics in superconducting double dots." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/270018.

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The work presented in this thesis investigates transitions between quantum states in superconducting double dots (SDDs), a nanoscale device consisting of two aluminium superconducting islands coupled together by a Josephson junction, with each dot connected to a normal state lead. The energy landscape consists of a two level manifold of even charge parity Cooper pair states, and continuous bands corresponding to charge states with single quasiparticles in one or both islands. These devices are fabricated using shadow mask evaporation, and are measured at sub Kelvin temperatures using a dilutio

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Zimmermann, Stephan. "Elektronenspinresonanz an niederdimensionalen und frustrierten magnetischen Systemen." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-215546.

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In der eingereichten Dissertation wird eine Reihe von niederdimensionalen und frustrierten magnetischen Systemen mit Hilfe der Elektronenspinresonanz (ESR) untersucht, um deren magnetische Eigenschaften und Wechselwirkungen zu charakterisieren. Sowohl niederdimensionale als auch frustrierte Systeme können exotische magnetische Phänomene zeigen, da es in beiden Fällen trotz starker magnetischer Korrelationen zu einer Unterdrückung von konventioneller langreichweitiger magnetischer Ordnung kommen kann. Auf der anderen Seite sind zweidimensionale Systeme wie Graphen und die damit verwandten top

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Yengui, Mayssa. "Manipulation de molécules organiques sur couches ultra-minces semi-isolantes et plots métalliques pour la fabrication de circuits moléculaires." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112289/document.

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L’objectif globale de cette thèse est l’étude de la croissance de plots de siliciure de cobalt (CoSi2) individuels combinés à une surface semi-isolante de silicium hydrogénée (Si(100):H) afin de créer un environnement propice à l’interconnexion de molécules fonctionnalisées, prémisse des circuits moléculaires. Cette étude, liée au contexte de l’électronique moléculaire ascendante, est réalisée à l’aide d’un microscope à effet tunnel (STM) à basse température (9 K) sous ultra-vide. Ce travail de thèse débute par l’étude de l’adsorption d’atomes de Co, à basse température (12 K) sur la surface d

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Jenderka, Marcus. "Pulsed Laser Deposition of Iridate and YBiO3 Thin Films." Doctoral thesis, Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-219334.

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Die vorliegende Arbeit befasst sich mit dem Dünnfilmwachstum der ternären Oxide Na2IrO3, Li2IrO3, Y2Ir2O7 und YBiO3. All diesen oxidischen Materialien ist gemein, dass sie Verwirklichungen sogenannter Topologischer Isolatoren oder Spin-Flüssigkeiten sein könnten. Diese neuartigen Materiezustände versprechen eine zukünftige Anwendung in der Quantencomputation, in magnetischen Speichern und in elektrischen Geräten mit geringer Leistungsaufnahme. Die Herstellung der hier gezeigten Dünnfilme ist daher ein erster Schritt zur Umsetzung dieser Anwendungen in der Zukunft. Alle Dünnfilme werden mittels

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Andrade, Eric de Castro e. "Cálculos numéricos de sistemas eletrônicos desordenados correlacionados." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277676.

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Orientador: Eduardo Miranda<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-16T08:19:56Z (GMT). No. of bitstreams: 1 Andrade_EricdeCastroe_D.pdf: 5537554 bytes, checksum: 1391d5fcc710b5e471f0814a4a6d484f (MD5) Previous issue date: 2010<br>Resumo: Sistemas eletrônicos fortemente correlacionados desordenados possuem dois mecanismos básicos para a localização eletrônica e a subsequente destruição do estado metálico: o de Mott (causado pela interação elétron-elétron) e o de Anderson (causado pela desordem). Nesta t

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Fil, Nicolas. "Caractérisation et modélisation des propriétés d’émission électronique sous champ magnétique pour des systèmes RF hautes puissances sujets à l’effet multipactor." Thesis, Toulouse, ISAE, 2017. http://www.theses.fr/2017ESAE0025/document.

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La fusion nucléaire contrôlée par confinement magnétique avec les réacteurs de type Tokamaks et les applications spatiales ont en commun d’utiliser des composants Haute-Fréquence (HF) sous vide à forte puissance. Ces composants peuvent être sujets à l’effet multipactor qui augmente la densité électronique dans le vide au sein des systèmes, ce qui est susceptible d’induire une dégradation des performances des équipements et de détériorer les composants du système. Ces recherches consistent à améliorer la compréhension et la prédiction de ces phénomènes. Dans un premier temps nous avons réalisé

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Bui, Thi Thanh Huyen. "Terminaisons verticales de jonction remplies avec des couches diélectriques isolantes pour des application haute tension utilisant des composants grand-gap de forte puissance." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI061/document.

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Le développement de l’énergie renouvelable loin des zones urbaines demande le transport d'une grande quantité d’énergie sur de longues distances. Le transport d’électricité en courant continu haute tension (HVDC) présente beaucoup d’avantages par rapport à celui en courant alternatif. Dans ce contexte il est nécessaire de développer des convertisseurs de puissance constitués par des composants électroniques très haute tension, 10 à 30 kV. Si les composants en silicium ne peuvent pas atteindre ces objectifs, le carbure de silicium (SiC) se positionne comme un matériau semiconducteur alternatif

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VIELZA, DE LA CRUZ Yoandris. "Evolução da superfície de Fermi do La2-xSrxCuO4: estados locais de Wannier/Hartree-Fock." Universidade Federal de Pernambuco, 2016. https://repositorio.ufpe.br/handle/123456789/18562.

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Submitted by Irene Nascimento (irene.kessia@ufpe.br) on 2017-04-17T18:48:07Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Mestrado.pdf: 3421668 bytes, checksum: 4a6d6f2568841028e0b66b952f2d15ba (MD5)<br>Made available in DSpace on 2017-04-17T18:48:07Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Mestrado.pdf: 3421668 bytes, checksum: 4a6d6f2568841028e0b66b952f2d15ba (MD5) Previous issue date: 2016-08-30<br>Este trabalho é uma extensão de uma modelagem tight

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Delille, Gauthier Marc Aimé. "Contribution du Stockage à la Gestion Avancée des Systèmes Électriques : approches Organisationnelles et Technico-économiques dans les Réseaux de Distribution." Phd thesis, Ecole Centrale de Lille, 2010. http://tel.archives-ouvertes.fr/tel-00586088.

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Des solutions innovantes doivent être développées pour envisager l'avenir des systèmes électriques face à un nombre grandissant de contraintes. En particulier, le stockage d'énergie est pressenti comme un soutien indispensable à l'essor massif dans les réseaux de distribution de sources de production exploitant les énergies renouvelables. Les présents travaux visent à apporter des éléments de réflexion sur cette option technique qui arrive à maturité et suscite l'intérêt. Dans un premier temps, des méthodes d'étude sont proposées pour cerner le potentiel et les opportunités du stockage distrib

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Rahim, Abdur. "Efeito Hall de spin em nanoestruturas semicondutoras: rumo à novos dispositivos de spintrônica." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-12072015-080251/.

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Este trabalho apresenta as propriedades de transporte eletrônico de isolantes topológicos bidimensionais (TI) baseados em poços quânticos de HgTe/CdTe. Estas heteroestruturas, no regime de bandas invertido, contem um novo estado conhecido como isolante de spin Hall quântico (QSHI). Este estado apresenta um comportamento de isolante no corpo (bulk), mas exibe estados condutores sem lacunas nas bordas (edges), as quais podem ser verificadas em medidas de transporte. Medidas de resistência de quatro terminais foram observadas perto do valor quantizado em amostras mesoscópicas. No entanto, para am

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Kilian, Rolf. "From cuprates to manganites: spin and orbital liquids." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 1999. http://nbn-resolving.de/urn:nbn:de:swb:14-994411393875-11016.

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Both cuprates and manganites belong to the transition metal oxides. The physics of these compounds is characterized by a dualism of local electron interaction and itinerant charge motion. In the present work, several key issues of metallic cuprates and manganites are addressed on a theoretical level, while close connection to recent experimental work is kept. The work is based on the notion of spin and orbital liquids, representing elegant tools to handle the strongly correlated nature of the metallic state in an efficient and transparent manner. A concise introduction to the physics of cuprat

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