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Dissertations / Theses on the topic 'Electron pairs'

Author: Grafiati

Published: 18 May 2024

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1

Carpenter, Joanna Katharine Hicks. "Magnetic field effects on electron transfer reactions in photosynthetic bacteria." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390466.

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2

Giebels, Franz-Josef [Verfasser], and Roland [Akademischer Betreuer] Feder. "Emission of electron-electron and electron-positron pairs from solid surfaces due to electron or positron impact / Franz-Josef Giebels. Betreuer: Roland Feder." Duisburg, 2015. http://d-nb.info/1075456193/34.

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3

Hencken, Kai. "Electromagnetic production of electron positron pairs in relativistic heavy ion collisions." [S.l.] : [s.n.], 1994. http://edoc.unibas.ch/diss/DissB_3179.

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4

Marchant, Melanie Erin. "Bose-Einstein condensation of exotic electron pairs in the Extended Hubbard Model." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266974.

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5

Fursman, Catherine E. "Electron spin echo envelope modulation spectroscopy of radical pairs in photosynthetic bacteria." Thesis, University of Oxford, 2000. http://ora.ox.ac.uk/objects/uuid:1ccaf0e5-3a45-4f13-a184-a4f1cf772c9b.

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Electron spin echo envelope modulation (ESEEM) spectroscopy is widely used to study the radical pairs created during the primary steps of photosynthesis. In this thesis the analysis of ESEEM spectra is improved, and some new applications and variations of this experiment suggested. Experimental spectra from species such as P<sup>+</sup>Q<sup>-</sup><sub>A</sub>, the secondary radical pair formed in the reaction centre of the bacterium Rhodobacter sphaeroides, give information about the exchange and dipolar couplings between the radicals. The model used to analyse the data affects the results;

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6

Wechakama, Maneenate. "Multi-messenger constraints and pressure from dark matter annihilation into electron-positron pairs." Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2013/6740/.

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Despite striking evidence for the existence of dark matter from astrophysical observations, dark matter has still escaped any direct or indirect detection until today. Therefore a proof for its existence and the revelation of its nature belongs to one of the most intriguing challenges of nowadays cosmology and particle physics. The present work tries to investigate the nature of dark matter through indirect signatures from dark matter annihilation into electron-positron pairs in two different ways, pressure from dark matter annihilation and multi-messenger constraints on the dark matter annihi

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7

Glendinning, I. "A study of inclusive lepton pairs in multihadronic events from electron positron annihilation at PETRA." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377472.

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8

Reis, Thomas. "Search for new massive resonances decaying to dielectrons or electron-muon pairs with the CMS detector." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209131.

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Le sujet de cette thèse porte sur la recherche de nouvelles résonances massives se désintégrant en une paire d’électrons ou une paire électron-muon avec le détecteur CMS, installé auprès du Grand Collisionneur du Hadrons (LHC) au CERN. Les données analysées correspondent à l’ensemble des collisions proton-proton enregistrées par le détecteur en 2012 à une énergie dans le centre de masse de 8 TeV. Après une brève introduction au modèle standard des particules élémentaires et à quelques unes des théories allant au-delà, le LHC et le détecteur CMS sont présentés. La reconstruction des différentes

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9

Asano, Yasuhiro, Yuki Sawa, Yukio Tanaka, and Alexander A. Golubov. "Odd-frequency pairs and Josephson current through a strong ferromagnet." American Physical Society, 2007. http://hdl.handle.net/2237/11285.

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10

[Verfasser], Maneenate Wechakama, and Matthias [Akademischer Betreuer] Steinmetz. "Multi-messenger constraints and pressure from dark matter annihilation into electron-positron pairs / Maneenate Wechakama. Betreuer: Matthias Steinmetz." Potsdam : Universitätsbibliothek der Universität Potsdam, 2013. http://d-nb.info/1041521669/34.

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11

Paudel, Hari. "The effect of electron-hole pairs in semiconductor and topological insulator nanostructures on plasmon resonances and photon polarizations." Doctoral diss., University of Central Florida, 2014. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6338.

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The generation of electron-hole pairs in materials has great importance. In direct bandgap semiconductor materials, the mechanism of radiative recombination of electron-hole pairs leads to the emission of photons, which is the basis of Light Emitting Diodes (LEDs). The excitation of electron-hole pairs by absorption of photons is the active process in photodiodes, solar cells, and other semiconductor photodetector devices. In optoelectronic devices such as optical switches which are based on transmission and reflection of the photons, electron-hole pairs excitation is a key for the device perf

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12

Boţan, Vitalie. "Bose-Einstein Condensation of Magnetic Excitons in Semiconductor Quantum Wells." Doctoral thesis, Uppsala University, Department of Physics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7112.

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<p>In this thesis regimes of quantum degeneracy of electrons and holes in semiconductor quantum wells in a strong magnetic field are studied theoretically. The coherent pairing of electrons and holes results in the formation of Bose-Einstein condensate of magnetic excitons in a single-particle state with wave vector <b>K</b>. We show that correlation effects due to coherent excitations drastically change the properties of excitonic gas, making possible the formation of a novel metastable state of dielectric liquid phase with positive compressibility consisting of condensed magnetoexcitons with

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13

Göringer, Christian [Verfasser]. "Search for high mass resonances decaying into electron-positron pairs in proton-proton collisions at √(s) = 7 TeV with the ATLAS detector [[Elektronische Ressource]] / Christian Göringer." Mainz : Universitätsbibliothek Mainz, 2013. http://d-nb.info/1034583670/34.

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14

Nowocin, John Kendall. "Kerr electro-optic measurements for electric field and space charge distributions using similar and dissimilar electrode pairs." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/82400.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 97).<br>The electrical breakdown strength of insulating materials is a major limiting factor of reliability in electric power, medical devices, and other high electric field applications. Electrical breakdown strength increase results in increased reliability and energy storage in high voltage capacitors and other devices. If a correlation can be found between the breakdown strength and the electric

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15

König, Sebastian [Verfasser]. "Measurement of the forward-backward asymmetry of Z boson decays in electron-positron pairs with the ATLAS detector in proton-proton collisions at root out s = 7TeV at the LHC / Sebastian König." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1047689995/34.

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16

Libby, James Frederick. "The study of e'+e'-#->##mu#'+#mu#'-(#gamma#) and the measurement of trilinear gauge couplings at LEP2 using the DELPHI detector." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301903.

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17

Moscoso, Michael Douglas. "Electron-positron pair winds /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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18

Blinne, Alexander [Verfasser], Holger [Gutachter] Gies, Burkhard [Gutachter] Kämpfer, and Antony [Gutachter] Ilderton. "Electron positron pair production in strong electric fields / Alexander Blinne ; Gutachter: Holger Gies, Burkhard Kämpfer, Antony Ilderton." Jena : Friedrich-Schiller-Universität Jena, 2017. http://d-nb.info/1177602954/34.

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19

Nahn, Steven C. (Steven Christopher) 1968. "Pair production of W bosons in electron positron annihilation." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50334.

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20

Adamczyk, Katrin. "Ultrafast charge transfer processes in solution." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2010. http://dx.doi.org/10.18452/16202.

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Die Reaktionspfade und Reaktionsdynamik photoinduzierter bimolekularer Ladungstransferreaktionen werden mit Hilfe der ultraschnellen polarisationsabhängigen UV-Pump/IR-Probe-Spektroskopie charakterisiert. Allgemein akzeptierte Modelle zur Beschreibung von bimolekularen Elektrontranserreaktionen nehmen an, dass Ladungstrennung in polaren Lösungsmitteln zu zwei Arten von Ionenpaaren führt, den lockeren (LIPs) und den engen Ionenpaaren (TIPs). TIPs und LIPs können durch die Beobachtung von Schwingungsmoden spektroskopisch unterschieden werden. Allerdings deuten die multiplen Zeitskalen sowohl für

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21

Damjanović, Sanja. "Electron pair production in Pb-Au collisions at 40 AGeV." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965148920.

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22

Hu, Yuan Zheng. "Theory of electron-hole pair excitations in semiconductor quantum dots." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185516.

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This dissertation considers one- and two-electron-hole-pair excitations in ideally spherical semiconductor quantum dots with infinite or finite confinement potentials. The optical absorption edge of the semiconductor micsrocrystallites is found to be higher than that in the corresponding bulk semiconductor. This blue shift is approximately proportional to 1/R², where R is the radius of the semiconductor microspheres. For small quantum dots with infinite confinement potential, the energies and wave-functions of quantum confined excitons and biexcitons are computed using a numerical matrix diago

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23

Zenker, Bernd [Verfasser]. "Electron-hole pair condensation at the semimetal-semiconductor transition / Bernd Zenker." Greifswald : Universitätsbibliothek Greifswald, 2014. http://d-nb.info/1051797799/34.

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24

Brinne, Roos Johanna. "Electron Recombination with Small Molecular Ions." Licentiate thesis, Stockholm : Bioteknologi, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4375.

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25

Norlin, Nils. "Extended Förster Theory of Electronic Energy Transport within Pairs of Reorienting Chromophoric Molecules." Doctoral thesis, Umeå universitet, Kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-22471.

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An extended Förster theory (EFT), previously derived (L. B.-Å. Johansson et al. J. Chem. Phys., 1996,105) has theoretically been adapted and used in simulations of donor-acceptor energy transfer (DAET), which is a process often referred to as FRET. It was shown that the classical Förster theory is only valid in the initial part of the fluorescence decay. In this thesis an EFT is derived and outlined for electronic energy transport between two fluorescent molecules which are chemically identical, but photophysically non-identical. The energy migration within such asymmetric pairs is partially r

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26

Norlin, Nils. "Extended Förster theory of electronic energy transport within pairs of reorienting chromophoric molecules /." Umeå : Department of Chemistry, Umeå University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-22471.

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27

Schumann, Frank O. [Verfasser], J. [Akademischer Betreuer] Kirschner, W. [Akademischer Betreuer] Widdra, and C. [Akademischer Betreuer] Back. "Studying the electron-electron correlation by pair emission from surfaces / Frank O. Schumann. Betreuer: J. Kirschner ; W. Widdra ; C. Back." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2012. http://d-nb.info/1025351878/34.

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28

Vampa, Giulio. "Role of Electron-Hole Recollisions in High Harmonic Generation from Bulk Crystals." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34935.

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When intense laser pulses interact with an atomic or solid target, high order harmonics of the fundamental laser frequency are generated. In the case of atoms, this highly nonlinear optical process is initiated by ionization and terminated by the energetic recollision and recombination of the ionized electron with its correlated ion. In this thesis I demonstrate, both theoretically and experimentally, that high harmonics from bulk crystals can originate from the recollision of electrons with their associated holes, similarly to the atomic case, but where ionization is replaced by excitati

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29

Tanaka, Yukio, Yasuhiro Asano, and Alexander A. Golubov. "Shape of Cooper pairs in a normal-metal/superconductor junction." American Physical Society, 2008. http://hdl.handle.net/2237/11296.

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30

Kalinin, Stanislav. "Electronic Energy Transfer within Asymmetric Pairs of Fluorophores: Partial Donor-Donor Energy Migration (PDDEM)." Doctoral thesis, Umeå : Univ, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-338.

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31

Sabin, Julien. "Stabilité, dispersion, et création de paires pour certains systèmes quantiques infinis." Phd thesis, Université de Cergy Pontoise, 2013. http://tel.archives-ouvertes.fr/tel-00924084.

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Cette thèse est consacrée à l'étude mathématique des propriétés de stabilité de systèmes quantiques infinis, décrits par des modèles non linéaires. Dans les chapitres 1 et 2, on étudie l'instabilité du vide relativiste menant au phénomène de création de paires électron-positron. Dans le chapitre 3, on considère la dynamique de ce même vide relativiste couplé à un champ scalaire. Les chapitres 4 et 5 sont consacrés au caractère dispersif de la dynamique non linéaire de Hartree pour des perturbations de la mer de Fermi, et en particulier à sa stabilité orbitale et asymptotique. Enfin, le chapitr

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32

Simkins, Luke. "Investigating electronic traps with a single cooper pair transistor." Thesis, Royal Holloway, University of London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538304.

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33

Bjerwe, Ida. "Automatic Alignment Detection and Correction in Infrared and Visual Image Pairs." Thesis, Linköpings universitet, Datorseende, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-165887.

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Previously well aligned image sensors, mounted on the same camera, might become misaligned depending on external vibrations. It is of interest to be able to automatically detect and correct for this misalignment, and to separate the deviation into pointing- and/or parallax errors. Two methods were evaluated for this purpose, an area based image registration method and a feature based image registration method. In the area based method normalized cross-correlation was used to estimate translation parameters. In the feature based method, SIFT or LIOP descriptors were used to extract features tha

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34

Parkes, Christopher John. "A determination of the W boson mass near the W-pair production threshold." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.390501.

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35

Ro, Youngju. "Molecular complexes for artificial photosynthesis." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS412/document.

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Le développement de sources d’énergie renouvelables telles que les combustibles solaires est une question cruciale dans le contexte actuel du réchauffement de la planète. L'eau est une source abondante, respectueuse de l'environnement, bon marché et abondante en électrons et en protons nécessaires à la production de combustible. Par conséquent, l'oxydation de l'eau activée par la lumière est une étape clé de la photosynthèse artificielle et le développement de catalyseurs efficaces, robustes et durables constitue un objectif important pour les chimistes. Dans la première partie de cette étude,

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36

Evans, David Lewis. "Studies of electrons in the CMS detector and a proposed search for high invariant mass e⁺e⁻ pairs." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702122.

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The Standard Model of particle physics is extremely well tested and yet is not believed to be a theory of everything. Many extensions of the Standard Model predict the existence of new particles. The Large Hadron Collider (LHC) is a high energy proton-proton collider which may be able to produce such particles. The Compact Muon Solenoid (CMS) experiment, a general purpose detector designed to measure the results of high energy proton-proton collisions at the LHC is described. In this work strategies have been developed to search for new physics by identifying high energy electrons produced by

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37

BRAMBILLA, GABRIELE. "ELECTRON POSITRON PAIR FLOW AND CURRENT COMPOSITION IN THE PULSAR MAGNETOSPHERE: STEPS TOWARD SELF-CONSISTENCY." Doctoral thesis, Università degli Studi di Milano, 2018. http://hdl.handle.net/2434/546452.

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We performed ab-initio Particle-In-Cell (PIC) simulations of a pulsar magnetosphere. We injected particles in two ways: everywhere and only near to the star surface. Then we study how the magnetosphere transitions from the vacuum to a nearly force-free configuration. We compare the injection from the surface force-free like configuration with ones obtained in a PIC simulation where particles are injected everywhere as well as with macroscopic force-free simulations. We found that although both PIC solutions have similar structure of electromagnetic fields and current density distributions, the

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38

Muscenti, Thomas Michael. "Density Functional Theory Study of Rutile SiO₂ Stishovite: An Electron Pair Description of Bulk and Surface Properties." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/10179.

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The bulk structure and the nonpolar, stoichiometric (110) surface of stishovite, rutile structure type SiO₂, has been studied using a first principles, density functional method. The geometric and electronic structure, including the density of states, charge density, and electron localization function for both the bulk and the surface have been examined. The electron pair properties of both bulk and surface-layer atoms were found to be similar to molecular analogs. The analogs allowed for the description of surface electronic structure using simple molecular models. The adsorption of hydrogen

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39

Jewsbury, P. J. "The electronic structure of the ion pair states of molecular iodine." Thesis, University of Edinburgh, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.653008.

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The electronic configurations of molecular states of iodine are studied through the Optical-Optical Double Resonance excitation of the ion pair states in low vibrational levels. The two photon OODR excitation of <i>ungerade</i> IP states from the <i>gerade</i> ground state is rationalised and the strength of <i>u</i>/<i>g</i> coupling at the intermediate step interpreted in terms of a hyperfine interaction first described by Broyer <i>et al</i>. The potential function of the cl<SUB>g</SUB>(<i>ab</i>) <i>gerade</i> coupling partner in the hyperfine Hamiltonian is derived, along with the lowest

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40

Jeanne, Matthieu. "Paris, un enjeu capital : rivalités de pouvoirs et stratégies d'acteurs pour le contrôle politique et l'aménagement de Paris." Thesis, Paris 8, 2015. http://www.theses.fr/2015PA080051/document.

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L’élection du socialiste Bertrand Delanoë en 2001 à la mairie de Paris marque une rupture majeure dans l’histoire de la capitale : Paris n’est plus le bastion du conservatisme qu’elle fut au XXe siècle. Dans le même temps, la ville connaît de profonds bouleversements sociologiques et démographiques : elle cesse de perdre des habitants, rajeunit et s’embourgeoise.L’analyse géopolitique s’avère féconde pour analyser ces mutations inédites. En effet, depuis 1977, le pouvoir municipal parisien, qui représente une position de pouvoir unique en France, est l’objet d’intenses rivalités. Longtemps ign

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41

Bouchiat, Vincent. "Fluctuations quantiques de la charge dans les circuits a un electron et a une paire de cooper." Paris 6, 1997. http://www.theses.fr/1997PA066241.

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Dans des circuits constituees d'electrodes metalliques sub-microniques de petite capacite c, separees par des jonctions tunnel, le transfert controle d'electrons individuels par effet tunnel peut etre realise : la charge des electrodes y est alors quantifiee en multiple d'electrons. L'operation de tels circuits <<<>a un electron<>>> necessite d'une part que l'energie caracteristique des fluctuations thermiques k#bt reste petite devant l'energie electrostatique des electrodes e#2/2c, et d'autre part que les resistances des jonctions soient grandes devant le quantum de resistance h/e#2. Quel est

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42

Sanchez, Carlos Alberto. "Towards single shot measurements of a Cooper pair box qubit using an rf single electron transistor." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/3203.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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43

Orakzai, Muazzam W. "Ion pair production and electron loss of fluorine and chlorine atom collisons with rare gas targets." Thesis, University of Ottawa (Canada), 1988. http://hdl.handle.net/10393/5184.

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44

Mizielinski, Matthew. "A theory of electron-hole pair excitation in the adsorption of simple atoms on metal surfaces." Thesis, University of Bath, 2007. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436869.

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Recent experiments have provided direct evidence for the excitation of electronhole pairs during the adsorption of atoms on metal surfaces. The excitation of electron-hole pairs is an inherently non-adiabatic process which is often ignored in standard theoretical treatments of surface phenomena, using tools such as density functional theory (DFT), as the Born-Oppenheimer approximation cannot be used. To obtain a theoretical model for the electronic excitation process it is therefore necessary to go beyond conventional methods. Previous theoretical descriptions have used a nearly-adiabatic appr

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45

Li, Qi. "A pair of stationary stochastic processes with application to Wichita temperature data." Thesis, Wichita State University, 2010. http://hdl.handle.net/10057/3644.

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The thesis investigates a pair of stationary stochastic process models whose domains are the set of integers and the set of real numbers respectively. The stationary processes with our specific correlation functions include the discrete and continuous first and second order autoregressive processes as their special cases. The maximum likelihood method is then applied to obtain the nonlinear equation system for the maximum likelihood estimators of the model parameters and the solutions are found by using the deepest gradient algorithm. The advantage of the algorithm lies in the calculation coul

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46

Xia, You. "Experiments on EHD injection, interaction and electrocoalescence of water droplet pairs in oil." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI039/document.

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Lorsque des champs électriques sont appliqués à des mélanges eau-huile, les petites gouttelettes d'eau sont attirées entre elles et se regroupent en gouttes plus grosses. Ce processus d’électrocoalescence rend plus efficace la séparation huile-eau par sédimentation.Des données expérimentales sur l’électrocoalescence de très petites gouttelettes sont nécessaires pour améliorer la compréhension de la dynamique de l'interface eau-huile et pour valider les modèles numériques. La configuration simple étudiée dans ce travail de thèse concerne une petite paire de gouttelettes tombant dans une cuve d'

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47

Li, Changhui [Verfasser], J. [Akademischer Betreuer] Kirschner, H. [Akademischer Betreuer] Winter, and Wolf [Akademischer Betreuer] Widdra. "Electron pair emission from surfaces upon He2+ impact / Changhui Li. Betreuer: J. Kirschner ; H. Winter ; Wolf Widdra." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2014. http://d-nb.info/1063331633/34.

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48

Behnke, Lucie [Verfasser], Jürgen [Akademischer Betreuer] Kirschner, Wolf [Akademischer Betreuer] Widdra, and Markus [Akademischer Betreuer] Donath. "Electron pair emission from NiO and metal surfaces / Lucie Behnke. Betreuer: Jürgen Kirschner ; Wolf Widdra ; Markus Donath." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2014. http://d-nb.info/1058587145/34.

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49

Ngetich, Geoffrey. "The defect level of carbon vacancy carbon antisite pair in 4H-SiC photo induced electron paramagnetic resonance." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/ngetich.pdf.

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50

Ardolino, Kyle R. "Semi-supervised learning of bitmask pairs for an anomaly-based intrusion detection system." Diss., Online access via UMI:, 2008.

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Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Electrical Engineering, 2008.<br>Includes bibliographical references.

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