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Dissertations / Theses on the topic 'Mesoscopics'

Author: Grafiati

Published: 4 June 2021

Last updated: 18 February 2022

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1

Sloggett, Clare Physics Faculty of Science UNSW. "Electron correlations in mesoscopic systems." Awarded by:University of New South Wales. School of Physics, 2007. http://handle.unsw.edu.au/1959.4/31875.

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This thesis deals with electron correlation effects within low-dimensional, mesoscopic systems. We study phenomena within two different types of system in which correlations play an important role. The first involves the spectra and spin structure of small symmetric quantum dots, or &quoteartificial atoms&quote. The second is the &quote0.7 structure&quote, a well-known but mysterious anomalous conductance plateau which occurs in the conductance profile of a quantum point contact. Artificial atoms are manufactured mesoscopic devices: quantum dots which resemble real atoms in that their symmetr

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2

Connolly, Malcolm. "Magnetometry of high temperature superconducting micro-disks and single crystals." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492292.

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Local Hall probe measurements and differential magneto-optical imaging with high spatial resolution have been used to investigate the magnetic state of high temperature superconducting Bi2Sr2CaCu2O8+� (BSCCO) micro-disks and platelet single crystals. The results obtained by magneto-optical imaging demonstrate that the field at which flux quantised vortices enter the disks decays exponentially with increasing temperature and the measured data agree well with analytic models for the thermal excitation of individual pancake vortices over Bean-Livingston surface barriers. Scanning Hall probe micro

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3

Inkaya, Ugur Yigit. "Ratchet Effect In Mesoscopic Systems." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606929/index.pdf.

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Rectification phenomena in two specific mesoscopic systems are reviewed. The phenomenon is called ratchet effect, and such systems are called ratchets. In this thesis, particularly a rocked quantum-dot ratchet, and a tunneling ratchet are considered. The origin of the name is explained in a brief historical background. Due to rectification, there is a net non-vanishing electronic current, whose direction can be reversed by changing rocking amplitude, the Fermi energy, or applying magnetic field to the devices (for the rocked ratchet), and tuning the temperature (for the tunneling ratchet). In

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4

Ožana, Marek. "Mesoscopic superconductivity : quasiclassical approach." Doctoral thesis, Umeå universitet, Institutionen för fysik, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-91484.

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This Thesis is concerned with the quasiclassical theory of meso-scopic superconductivity. The aim of the Thesis is to introduce the boundary conditions for a quasiclassical Green’s function on partially transparent interfaces in mesoscopic superconducting structures and to analyze the range of applicability of the quasiclassical theory. The linear boundary conditions for Andreev amplitudes, factoring the quasiclassical Green’s function, are presented. The quasiclassical theory on classical trajectories is reviewed and then generalized to include knots with paths intersections. The main focus

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5

Cipiloglu, Mustafa Ali. "Thermoelectric Effects In Mesoscopic Physics." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12604753/index.pdf.

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The electrical and thermal conductance and the Seebeck coefficient are calculated for one-dimensional systems, and their behavior as a function of temperature and chemical potential is investigated. It is shown that the conductances are proportional to an average of the transmission probability around the Fermi level with the average taken for the thermal conductance being over a wider range. This has the effect of creating less well-defined plateaus for thermal-conductance quantization experiments. For weak non-linearities, the charge and entropy currents across a quantum point contact are ex

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6

Burghout, Wilco. "Hybrid microscopic-mesoscopic traffic simulation." Doctoral thesis, KTH, Infrastruktur, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-72.

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Traffic simulation is an important tool for modelling the operations of dynamic traffic systems and helps analyse the causes and potential solutions of traffic problems such as congestion and traffic safety. Microscopic simulation models provide a detailed representation of the traffic process, which makes them most suitable for evaluation of complicated traffic facilities and Intelligent Transportation Systems that often consist of complex traffic management, safety and information systems. Macroscopic and mesoscopic models on the other hand, capture traffic dynamics in lesser detail, but are

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7

Metalidis, Georgo. "Electronic transport in mesoscopic systems." [S.l.] : [s.n.], 2007. http://deposit.ddb.de/cgi-bin/dokserv?idn=985476753.

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8

Maassen, Ralph. "Mesoscopic particles in polymer solutions." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964969610.

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9

Bartels, Guido. "Mesoscopic Aspects of Solid Friction." Gerhard-Mercator-Universitaet Duisburg, 2006. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-01272006-083621/.

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The phenomenon of friction is on the one hand useful, for example for walking, which would not be so easy without friction, and on the other hand disturbing, for example in wheel bearings, where it slows down desired motion. Therefore, the origin and effect of friction is under intense research. One main point in this work is the analytic investigation of the coupling between friction force and (torsion) friction torque of a sliding and spinning disk. The local friction force at a contact area element was chosen to be an algebraic function of the local relative velocity with an exponent α > 0.

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10

Constas, Styliani. "Reactions in mesoscopic liquid clusters." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0005/NQ27896.pdf.

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11

Huffelen, Wim Michel van. "Mesoscopic silicon-coupled superconducting junctions." [S.l. : Groningen : s.n.] ; University Library Groningen [Host], 1992. http://irs.ub.rug.nl/ppn/136234755.

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12

Robledo, Esparza Lucio Martín. "Optical manipulation of mesoscopic systems." München Verl. Dr. Hut, 2008. http://d-nb.info/989622711/04.

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13

De, Fabritiis Gianni. "Stochastic dynamics of mesoscopic fluids." Thesis, Queen Mary, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268402.

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14

Bruun, John Thomas. "Statistical properties of mesoscopic superconductors." Thesis, Lancaster University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238960.

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15

Ryder, Jennifer F. "Mesoscopic simulations of complex fluids." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422696.

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16

Sulaiman, Nidhal A. "Mesoscopic modelling of nematic emulsions." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432255.

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17

Mason, Douglas Joseph. "Analytical Methods in Mesoscopic Systems." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10548.

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The propsect of designing technologies around the quantum behavior of mesoscopic devices is enticing. This thesis present several tools to facilitate the process of calculating and analyzing the quantum properties of such devices – resonance, boundary conditions, and the quantum-classical correspondence are major themes that we study with these tools. In Chapter 1, we begin by laying the groundwork for the tools that follow by defining the Hamiltonian, the Green’s function, the scattering matrix, and the Landauer formalism for ballistic conduction. In Chapter 2, we present an efficient and eas

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18

Kaerger, Joerg Sebastian. "Controlled crystallisation of mesoscopic particles." Thesis, University of Bath, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.425636.

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19

Cobden, David Henry. "Individual defects in mesoscopic transistors." Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386908.

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20

Zhou, Fei. "Coherence effects in mesoscopic systems /." Thesis, Connect to this title online; UW restricted, 1997. http://hdl.handle.net/1773/9787.

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21

Liu, Xiya. "Mesoscopic effects in ferromagnetic materials." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24669.

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Thesis (Ph.D.)--Physics, Georgia Institute of Technology, 2008.<br>Committee Chair: Davidovic, Dragomir; Committee Member: Citrin, David; Committee Member: Kindermann, Markus; Committee Member: Marchenkov, Alexei; Committee Member: Riedo, Elisa

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22

Radtke, Paul Kaspar. "Mesoscopic Models of Stochastic Transport." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19152.

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Transportphänomene treten in biologischen und künstlichen Systemen auf allen Längenskalen auf. In dieser Arbeit untersuchen wir sie für verschiedene Systeme aus einer mesoskopischen Perspektive, in der Fluktuationen physikalischer Größen um ihre Mittelwerte eine wichtige Rolle spielen. Im ersten Teil untersuchen wir die persistente Bewegung aktiver Brownscher Teilchen mit zusätzlichem Drehmoment, wie sie z.B. für Spermien oder Janus Teilchen auftritt. Wird ihre Bewegung auf einen Tunnel variierender Breite beschränkt, so setzt im thermischen Nichtgleichgewicht Transport ein; ungericht

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23

Sarkozy, Stephen Joseph. "Mesoscopic transport in undoped heterostructures." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612534.

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24

Good, Kevin. "Mesoscopic lattice Boltzmann nemato-dynamics." Thesis, Sheffield Hallam University, 2001. http://shura.shu.ac.uk/19702/.

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In this thesis we have developed an anisotropic lattice Boltzmann (LB) model that recovers the incompressible isentropic Ericksen-Leslie-Parodi (ELP) equations of continuum nemato-dynamics in two dimensions with the director confined to the plane. Suitable validations of the developed model against known solutions of the continuum theory are undertaken as. well as investigations into nematic flow in interesting geometries. The model is based upon two coupled LBE schemes, the standard momentum density distribution and a new link angle distribution. To achieve evolution, the link angle distribut

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25

Grimbert, François. "Mesoscopic models of cortical structures." Nice, 2008. http://www.theses.fr/2008NICE4071.

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Cette thèse traite de modèles mésoscopiques de colonnes et d’aires corticales. Nous modélisons une colonne corticale comme un petit réseau de masses neuronales et une aire comme un réseau continu de telles colonnes, formant un champ neuronal. La première partie de cette thèse est consacrée aux colonnes corticales. Nous faisons une revue des connaissances actuelles sur la circuiterie columnaire puis nous présentons une étude mathématique d’un modèle mésoscopique de colonne basée sur les bifurcations. Dans la seconde partie, nous étudions deux modèles non-linéaires de champs neuronaux. Le premie

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26

Yang, Ping 1961. "Thermal transport in mesoscopic dielectric systems." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85107.

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Although the study of thermal transport in condensed matter has a very long history, it continues to be an active field of work due to its importance in many applications. The research subject reported in this thesis is on theoretical investigations of thermal energy transport in systems whose linear dimension is less than the wavelength of thermal phonons. Such situations occur in mesoscopic and nanoscopic scale dielectric structures which can now be fabricated in a number of laboratories. Due to the small system dimensions, phonons must be treated as waves. Thermal energy transport, t

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27

Zhang, Xusheng. "Mesoscopic models of block copolymer rheology." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=96823.

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We develop a mesoscopic theoretical framework to study viscoelastic response of block copolymers in the vicinity of their order-disorder transition point. We use it to study orientation selection of lamellar phases of diblock copolymers under oscillatory shears. We examine the effect of hydrodynamics on the relaxation of lamellar phases, and include anisotropic viscous stresses that follow from the uniaxial nature of the phase. We also introduce network viscoelastic effects that model chain entanglements, also made consistent with the symmetry of the phase. A numerical algorithm has been devel

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28

Lui, Chi-keung Arthur. "Transport properties of hybrid mesoscopic systems." Click to view the E-thesis via HKUTO, 2004. http://sunzi.lib.hku.hk/hkuto/record/B30727339.

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29

Reguera, D. (David). "Mesoscopic Nonequilibrium Kinetics of Nucleation Processes." Doctoral thesis, Universitat de Barcelona, 2001. http://hdl.handle.net/10803/663185.

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Esta tesis está dedicada al estudio de la cinética de la nucleación centrada en sus aspectos mesoscópicos y fuera equilibrio. Hemos desarrollado y presentado un marco teórico, basado en la Termodinámica Mesoscópica y de No Equilibrio (MNET), que garantiza una descripción flexible, bien fundamentada y conectada con las simulaciones de la dinámica de procesos fuera de equilibro, y en particular de la cinética de la nucleación. Este marco se ha mostrado especialmente útil para desvelar las sutilezas mesoscópicas y las influencias potenciales del carácter de no equilibrio del proceso. En par

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30

Diaconescu, Dorina. "Ballistic electron transport in mesoscopic samples." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962295191.

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31

Magnée, Petrus Hubertus Cornelis. "Mesoscopic transport in superconductor - semiconductor structures." [S.l. : [Groningen] : s.n.] ; [University Library Groningen] [Host], 1996. http://irs.ub.rug.nl/ppn/14856769X.

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32

Robinson, Simon Jon. "Quantum electronic properties of mesoscopic superconductors." Thesis, Lancaster University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332082.

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33

Pooley, Christopher M. "Mesoscopic modelling techniques for complex fluids." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398125.

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34

Lui, Chi-keung Arthur, and 呂智強. "Transport properties of hybrid mesoscopic systems." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B30727339.

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35

趙學安 and Xuean Zhao. "Electrochemical capacitance in a mesoscopic structure." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31239778.

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36

Garcia, Coello J. L. "Quantum information processing in mesoscopic systems." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1370589/.

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This thesis discusses various schemes and protocols for quantum information processing in mesoscopic systems with particular focus on using the spin of a particle as the bearer of information. The first chapter introduce various aspects of the field of quantum information used in this thesis such as qubits, entanglement, its quantification, quantum logic gates and entanglement swapping. In this chapter concepts such as AKLT states, decoherence and adiabatic elimination are introduced as they will be relevant in the thesis. In chapter 2 we introduce the Quantum Dots as the solid state system th

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37

Irfachsyad, Danial. "Mesoscopic simulation of polymers and colloids." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252212.

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38

Dzurak, Andrew Steven. "Ballistic hot-electrons in mesoscopic transistors." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308185.

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39

Stroh, RuÌˆediger Joachim. "Fluctuation phenomena in mesoscopic silicon devices." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358804.

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40

Rozhkov, Alexandr Vladimirovich. "Josephson tunneling through interacting mesoscopic system /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2001. http://wwwlib.umi.com/cr/ucsd/fullcit?p3022187.

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41

Zhao, Xuean. "Electrochemical capacitance in a mesoscopic structure /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20978716.

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42

Purbach, Ulrich. "Electron transport in mesoscopic metallic structures /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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43

Armata, Federico. "Light matter interaction in mesoscopic systems." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/55876.

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The study of light-matter interaction has led to many fundamental discoveries as well as to the development of new technology. In this thesis, we investigate the interaction between light and matter in different mesoscopic systems such us Fabry-Perot cavities with fixed and/or moving mirrors (optomechanical cavities) and superconducting circuits. In the context of optomechanical cavities, we isolate genuine quantum contributions of the interaction between an optical field and a mechanical mirror and study how to probe nonlinearities of the mechanical motion. We also investigate dynamical corre

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44

Lee, Hyunwoo. "Electric current fluctuations in mesoscopic systems." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38380.

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45

Ferone, Raffaello. "Thermoelectric transport in disordered mesoscopic systems." Université Joseph Fourier (Grenoble), 2006. http://www.theses.fr/2006GRE10036.

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Landau theory of Fermi liquids foresees that the charge and heat are tranported by the same objects: the fermionic Landau quasi-particles. In a very general way, it is true if the screening among particles is quite strong to can consider the system as composed yet by independent particles. This is the case for the electron sea in an ordinary bulk metal. The existance of just one responsible for charge and heat transport is expressed by the Wiedemann-Franz (WF) law. It states that the ratio between the thermal and electrical conductivity depends on temperature by a constant which is more or les

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46

WICKRAMASINGHE, J. M. A. S. P. "MESOSCOPIC FEATURES OF CLASSICALLY INTEGRABLE SYSTEMS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1140806635.

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47

Yue, Huanyu. "Mesoscopic Fuel Consumption and Emission Modeling." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/26695.

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The transportation sector is a major contributor to U.S. fuel consumption and emissions. Consequently, assessing the environmental impacts of transportation activities is essential for air-quality improvement programs. Current state-of-the-art models estimate vehicle emissions based on typical urban driving cycles. Most of these models offer simplified mathematical expressions to compute fuel consumption and emission rates based on average link speeds while ignoring transient changes in a vehicleâ s speed and acceleration level as it travels on a highway network. Alternatively, microscopic

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48

Carlisle, Andrew Alan William. "Quantum features in mesoscopic bosonic systems." Thesis, Queen's University Belfast, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725499.

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We study the means and extent to which quantum features can persist on a scale between that of microscopic and macroscopic, the mesoscopic scale. We examine first the dynamics of quantum features during the sudden quench of two coupled harmonic oscillators in contact with a thermal bath and we uncover a clear functional relation between quantum characteristics and thermodynamic figures of merit We then turn our attention to the system of a movable mirror in an optical cavity and assess its potential to generate a macroscopically quantum superposition using a Wigner function based measure. We c

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49

Golod, Taras. "Mesoscopic phenomena in hybrid superconductor/ferromagnet structures." Doctoral thesis, Stockholms universitet, Fysikum, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-56629.

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This thesis explores peculiar effects of mesoscopic structures revealed at low temperatures. Three particular systems are studied experimentally: Ferromagnetic thin films made of diluted Pt1-xNix alloy, hybrid nanoscale Nb-Pt1-xNix-Nb Josephson junctions, and planar niobium Josephson junction with barrier layer made of Cu or Cu0.47Ni0.53 alloy. A cost-effective way is applied to fabricate the sputtered NixPt1-x thin films with controllable Ni concentration. 3D Focused Ion Beam (FIB) sculpturing is used to fabricate Nb-Pt1-xNix-Nb Josephson junctions. The planar junctions are made by cutting Cu

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50

Maciejko, Joseph. "Time-dependent quantum transport in mesoscopic structures." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99346.

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In this thesis, we present a theory to calculate the time-dependent current flowing through an arbitrary noninteracting nanoscale phase-coherent device connected to arbitrary noninteracting external leads, in response to sharp step- and square-shaped voltage pulses. Our analysis is based on the Keldysh nonequilibrium Green's functions formalism, and provides an exact analytical solution to the transport equations in the far from equilibrium, nonlinear response regime. The essential feature of our solution is that it does not rely on the commonly used wideband approximation where the coupling b

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