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Dissertations / Theses on the topic 'Gases in'

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Published: 25 July 2024

Last updated: 31 July 2025

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1

Ozturk, Bahtiyar. "Removal of acidic gases from flue gases using membrane contactors." Thesis, University of Salford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265396.

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2

McGinley, Susan. "Measuring Soil Gases." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1993. http://hdl.handle.net/10150/622349.

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3

Whitehead, Thomas Michael. "Interacting Fermi gases." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274548.

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Interacting Fermi gases are one of the chief paradigms of condensed matter physics. They have been studied since the beginning of the development of quantum mechanics, but continue to produce surprises today. Recent experimental developments in the field of ultracold atomic gases, as well as conventional solid state materials, have produced new and exotic forms of Fermi gases, the theoretical understanding of which is still in its infancy. This Thesis aims to provide updated tools and additional insights into some of these systems, through the application of both numerical and analytical techn

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4

Cunje, Alwin. "Noble gases and catalysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0012/NQ59125.pdf.

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5

Sadeghzadeh, Kayvan. "Spin polarised Fermi gases." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610744.

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6

Giovanelli, Debora. "Electrochemical detection of gases." Thesis, University of Oxford, 2004. http://ora.ox.ac.uk/objects/uuid:fd447153-b6dd-4be1-aae5-4ece5dc36856.

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This thesis discusses diverse electrochemical strategies for the determination of the concentration of the gases hydrogen sulfide, ammonia and halothane. The chemical tagging of sulfide by a variety of structurally diverse substituted benzoquinone species was studied over a wide range of pH (2<pH<10). Each derivative was found to respond to increasing concentration of sulfide (typically over a range 10-200 μM). The electrochemically initiated reaction of N,N-diethyl-pphenylenediamine (DEPD) with sulfide in N,N-dimethylformamide (DMF) was next examined with quantitative detection of sulfide (li

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7

Madeira, Lucas 1991. "Many-body systems : heavy rare-gases adsorbed on graphene substrates and ultracold Fermi gases = Sistemas de muitos corpos: gases nobres pesados adsorvidos em substratos de grafeno e gases de Fermi ultrafrios." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/276942.

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Orientador: Silvio Antonio Sachetto Vitiello<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin<br>Made available in DSpace on 2018-08-28T00:18:16Z (GMT). No. of bitstreams: 1 Madeira_Lucas_M.pdf: 4273856 bytes, checksum: 8543c0dd916e2ec3fc638a5d31b32787 (MD5) Previous issue date: 2015<br>Resumo: Nessa dissertação nós investigamos dois sistemas de muitos corpos. Na primeira parte nós escolhemos uma abordagem clássica para estudar a adsorção de gases nobres pesados, Ne, Ar, Kr, Xe e Rn, em substratos de grafeno. Nós apresentamos evidências de cama

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8

Teague, Kenneth Grayson. "Predictive dynamic model of a small nonisothermal pressure swing air separation process /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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9

Kreslavskiy, Dmitry Michael. "Lorentz Lattice Gases on Graphs." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/6423.

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The present work consists of three parts. In the first part (chapters III and IV), the dynamics of Lorentz lattice gases (LLG) on graphs is analyzed. We study the fixed scatterer model on finite graphs. A tight bound is established on the size of the orbit for arbitrary graphs, and the model is shown to perform a depth-first search on trees. Rigidity models on trees are also considered, and the size of the resulting orbit is established. In the second part (chapter V), we give a complete description of dynamics for LLG on the one-dimensional integer lattice, with a particular interest in showi

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10

Asatani, Haruki. "Solubility of gases in liquids." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4643.

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11

Jawad, Shadwan Hamid. "Thermal conductivity of polyatomic gases." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367922.

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12

Clark, D. "Electrochemical sensors for medical gases." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382605.

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13

Lucas, A. K. "Electron loss process in gases." Thesis, Swansea University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637958.

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14

Hart, J. "Separation of gases by adsorption." Thesis, University of Bath, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234617.

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15

Meehan, Nicola J. "Continuous reactions in compressed gases." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288085.

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16

McLaughlin, J. G. "Chemistry in liquid noble gases." Thesis, University of Nottingham, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356030.

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17

Carter, Daniel N. "Continuous reactions in dense gases." Thesis, University of Nottingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.416386.

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18

Assafiri, T. I. "The electrochemical reduction of gases." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370620.

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19

Choi, Doowon. "Ultrasound propagation in various gases." Thesis, University of Warwick, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250087.

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20

Bauer, Marianne Sigrid. "Ultracold gases in low dimensions." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708055.

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21

Oktel, Mehmet Özgür 1974. "Optical excitations in cold gases." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8276.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2001.<br>Includes bibliographical references (leaves 93-96).<br>In this thesis, we study the effects of interparticle interactions on the optical spectrum of cold gases. We first consider homogenous gas in the weak excitation regime and find that the optical spectrum of a system of Bosons is highly sensitive to interactions. We find that optical excitations, at temperatures low enough for the thermal de Broglie wavelength to be larger than the scattering length, become collective modes. We study collective affects in the

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22

Mokrani, Touhami. "Transport of gases across membranes." Thesis, Peninsula Technikon, 2000. http://hdl.handle.net/20.500.11838/878.

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Thesis (MTech (Chemical Engineering))--Peninsula Technikon, 2000.<br>Oxygen transport across biofilms and membranes may be a limiting factor in the operation of a membrane bio-reactor. A Gradostat fungal membrane bio-reactor is one in which fungi are immobilized within the wall of a porous polysulphone capillary membrane. In this study the mass transfer rates of gases (oxygen and carbon dioxide) were investigated in a bare membrane (without a biofilm being present). The work provides a basis for further transport study in membranes where biomass is present. The diaphragm-cell metho

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23

Savikko, M. (Mikko). "Efimov states in ultracold gases." Master's thesis, University of Oulu, 2014. http://urn.fi/URN:NBN:fi:oulu-201403111157.

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This work will introduce the Efimov effect and the resonant and scaling limits and derive the formula for the binding energies of the Efimov states. We use the hyperspherical coordinates for the stationary wave function of three particles and solve the low-energy Faddeev equation with the hyperspherical expansion and use the expansion for solving the channel eigenvalues. The channel eigenvalues are defined by a constant, which is the solution of the resulting transcendental equation. We also solve the scaling-violation parameter and finally compile all the results to derive the Efimov states.

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24

Shteynas, Boris. "Spin-orbit coupled Bose gases." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/127720.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2019<br>Cataloged from the official PDF of thesis.<br>Includes bibliographical references (pages 147-151).<br>Quantum simulation is a very active and growing field. Various quantum systems can be used to emulate existing materials in an accurate and controllable way, as well as to generate new states of matter that have not been found in the real world but the existence of which does not contradict the fundamental laws of physics. Ultracold atoms form a perfect system to realize idealized models and study physical me

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25

Morren, Sybil Huang. "Transonic aerodynamics of dense gases." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/42210.

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Transonic flow of dense gases for two-dimensional, steady state, flow over a NACA 0012 airfoil was predicted analytically. The computer code used to model the dense gas behavior was a modified version of Jameson's FLOS2 airfoil code. The modifications to the code enabled modeling the dense gas behavior near the saturated vapor curve and critical pressure region where the fundamental derivative, Γ, is negative. This negative Γ region is of interest because the nonclassical gas behavior such as formation and propagation of expansion shocks, and the disintegration of inadmissible compression shoc

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26

Watt, Richard Comrie 1952. "Corona discharge in anesthetic gases." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/291711.

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The goal of this work was to assess the feasibility of using corona discharge quenching by anesthetic gases as a technique for anesthetic gas concentration measurement. Two experiments were conducted to investigate corona discharge and measure changes due to anesthetic gases. Experiment One used a chamber in which a high voltage was imposed across two parallel plane electrodes, between which gases under test could flow. Halothane, ethrane, and nitrous oxide were shown to have corona discharge quenching effects proportional to their relative potency. In an attempt to improve accuracy and decrea

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27

Ziemniczak, Aline. "Geração de novas correlações da soma-ponderada-de-gases-cinzas para espécies individuais de gases participantes." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/103827.

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Modelos numéricos envolvendo a transferência de calor por radiação em gases participantes são bastante complexos de ser resolvidos devido à dependência espectral das propriedades radiantes. Contudo, a radiação térmica não pode ser negligenciada em processos de combustão, onde as elevadas temperaturas envolvidas tornam a radiação o principal fenômeno de transferência de calor. O cálculo da transferência de calor por radiação envolve propriedades de absorção que variam de forma complexa com a temperatura e número de onda, sendo assim necessária a utilização de modelos espectrais para obtenção de

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28

Kam, Chung-hau Brian. "A comparison & contrast of Hong Kong and overseas practices in landfill gas management." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19945589.

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29

Arthur, Lia Frieda. "Silicate sorbents for flue gas cleaning /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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30

Trefzger, Christian. "Ultracold dipolar gases in optical lattices." Doctoral thesis, Universitat Politècnica de Catalunya, 2010. http://hdl.handle.net/10803/6596.

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Esta tesis es un trabajo teórico, en el que estudiamos la física de los átomos dipolares bosónicos ultrafríos en retículos ópticos. Éstos gases consisten de átomos o moléculas bosónicas, enfriados bajo la temperatura de degeneración cuántica, típicamente del orden de nK. En éstas condiciones, en una trampa armónica tridimensional (3D), los bosones que interaccionan débilmente condensan y forman un Condensado de Bose Einstein (BEC). Cuando se carga un BEC en un retículo óptico producido por ondas estacionarias de luz láser, se producen nuevos fenómenos físicos. Estos sistemas entonces realizan

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31

Beyerle, Urs. "Groundwater dynamics, paleoclimate and noble gases /." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13078.

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32

Punk, Matthias. "Many-particle physics with ultracold gases." kostenfrei, 2010. https://mediatum2.ub.tum.de/node?id=956951.

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33

Pedri, Paolo. "Dynamical behavior of ultracold atomic gases." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975830414.

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34

Leray, Gary. "PEGASES: Plasma Propulsion with Electronegative Gases." Phd thesis, Ecole Polytechnique X, 2009. http://pastel.archives-ouvertes.fr/pastel-00005935.

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35

Price, Hannah. "Topological phenomena in ultracold atomic gases." Thesis, University of Cambridge, 2013. https://www.repository.cam.ac.uk/handle/1810/245059.

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Topological phenomena arise in a wide range of systems, with fascinating physical consequences. There is great interest in finding new ways to measure such consequences in ultracold atomic gas experiments. These experiments have significant advantages over the solid-state as ultracold atoms are controllable, tuneable and clean. They can also be used to investigate properties which are inaccessible in other quantum systems. We explore some of the novel features of topological energy bands and topological solitons in ultracold gases. Topological energy bands have important geometrical properties

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36

Fernandes, Christine. "Termodinamica estendida de gases completamente ionizados." reponame:Repositório Institucional da UFPR, 1996. http://hdl.handle.net/1884/48849.

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Orientador: Gilberto Medeiros Kremer<br>Dissertação(mestrado) - Universidade Federal do Parana<br>Resumo: Desenvolve-se uma teoria baseada na termodinâmica estendida para uma mistura binária constituída de íons e elétrons, sujeitos à ação de um campo magnético externo B, caracterizando um gás completamente ionizado. Os campos básicos desta teoria são as densidades de massa parcial, velocidade parcial, tensor pressão parcial e fluxo de calor parcial, perfazendo um total de vinte e seis campos escalares, cujas equações de balanço são obtidas a partir da equação cinética de Boltzmann. Do p

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37

Franco, Kleber Serrão. "Filtração de gases a altas pressões." Universidade Federal de São Carlos, 2012. https://repositorio.ufscar.br/handle/ufscar/4106.

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Made available in DSpace on 2016-06-02T19:56:49Z (GMT). No. of bitstreams: 1 4842.pdf: 3843983 bytes, checksum: dba16fdf2f921799ee872793185384b3 (MD5) Previous issue date: 2012-10-31<br>The filtration of gases is an important industrial operation with the primary aim of removing unwanted solid particles contained in a gas. The filtration of gases at high pressures is an operation widely used in natural gas industry with the aim of separating impurities called black powder, from rust inside pipelines along the transportation. These residues can cause wear on equipment such as, for example, ro

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38

Malevanets, Anatoly. "Statistical mechanics of hydrodynamic lattice gases." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ27690.pdf.

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39

Steinbacher, John James. "Positron annihilation in simple condensed gases." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0001/NQ35980.pdf.

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40

Gunawardena, Rohith. "Global distribution of organo-bromine gases /." Full text open access at:, 1989. http://content.ohsu.edu/u?/etd,245.

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41

Alam, M. "Computation of flow of rotating gases." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239352.

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42

Murphy, A. K. "Satellite measurements of atmospheric trace gases." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371568.

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43

Baker, S. J. "Piezoelectric crystal detection of noxious gases." Thesis, University of Hull, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380775.

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44

Jackman, L. A. "Sprinkler spray interactions with fire gases." Thesis, London South Bank University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482025.

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45

Nunnenkamp, Andreas. "Strong correlations in ultracold atomic gases." Thesis, University of Oxford, 2008. http://ora.ox.ac.uk/objects/uuid:6e09e9d3-f5cd-4580-a667-6599203162e2.

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In this thesis we investigate strongly-correlated states of ultracold bosonic atoms in rotating ring lattices and arrays of double-well potentials. In the first part of the thesis, we study the tunneling dynamics of ultracold bosons in double-well potentials. In the non-interacting limit single-particle transitions dominate, while in the interaction-dominated regime correlated tunneling of all particles prevails. At intermediate times of the many-particle flopping process correlated states occur, but the timescales of these processes increase dramatically with the number of particles. Using an

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46

Douglas, James Stewart. "Light scattering from ultracold atomic gases." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:0aa4ede3-8b6e-45d4-a112-a2d18271307c.

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Systems of ultracold atoms in optical potentials have taken a place at the forefront of research into many-body atomic systems because of the clean experimental environment they exist in and the tunability of the system parameters. In this thesis we study how light scattered from these ultracold atomic gases reveals information about the state of the atomic gas and also leads to changes in that state. We begin by investigating the angular dependence of light scattered from atoms in optical lattices at finite temperature. We demonstrate how correlations in the superfluid and Mott insulator stat

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47

Heaney, Libby. "Entanglement of non-interacting Bose gases." Thesis, University of Leeds, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491808.

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Entanglement in many-body systems of identical particles often resides between modes of the field occupied by particles rather than between the particles themselves, or their internal degrees of freedom. Spatial field modes are an important choice of modes and investigating entanglement between them for a non-interacting Bose gas is the concern of this thesis. A particularly interesting phase of a Bose gas is a Bose-Einstein condensate (BEC). Long-range correlations between all points in space exist in a BEC, which are detected by the single-particle reduced density matrix.

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48

Newell, Catherine A. "INELASTIC COLLISIONS IN COLD DIPOLAR GASES." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/30.

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Inelastic collisions between dipolar molecules, assumed to be trapped in a static electric field at cold (> 10−3K) temperatures, are investigated and compared with elastic collisions. For molecules with a Λ-doublet energy-level structure, a dipole moment arises because of the existence of two nearly degenerate states of opposite parity, and the collision of two such dipoles can be solved entirely analytically in the energy range of interest. Cross sections and rate constants are found to satisfy simple, universal formulas. In contrast, for molecules in a Σ electronic ground state, the static e

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49

Ivings, Matthew J. "Wave propagation through gases and liquids." Thesis, Manchester Metropolitan University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389611.

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Recent work by a number of researchers has highlighted areas in which conservative numerical methods give poor solutions. One such situation is in the modelling of material interfaces. A number of methods for overcoming this shortfall of conservative numerical methods are developed. The flow situations that are considered include multicomponent gases and systems of gases and liquids. It is shown that the errors associated with conservative methods when applied to model gas-liquid interfaces are considerably larger than those for gas-gas interfaces. The first approach used for overcoming the er

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50

Blackwood, Jennifer Elizabeth. "Positronium scattering by the noble gases." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343099.

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