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Dissertations / Theses on the topic 'Gaseous'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Combs, Roger J. "Gaseous diffusion in liquids." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/76484.

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Diffusivity of nonreactive gases in liquids provides a means of interpreting structure in the liquid state. Structural models of the liquid state include Hildebrand's condensed gas model and Eyring's pseudo-lattice model. The former model predicts a linear dependence of diffusivity with temperature while the latter model predicts linear dependence of log(D) versus 1/T. The limited temperature dependent diffusivity data to date with a typical precision of ± 5% do not permit distinguishing which temperature dependence is more linear. However, the present investigation shows that diffusivities of

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2

Noble, Anthony James. "Pion transfer in gaseous hydrogen." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26016.

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The experiment consisted of stopping negative pions in a high pressure gas target to measure the transfer rate π-p → π-d in mixtures of H2, D2 and HD gas. The gamma rays from the decay of the π ⁰ in π -p → n + π ⁰ were detected in coincidence using two large sodium iodide crystals. The probability that a pion be transferred to a deuteron from a pionic hydrogen complex was described in terms of a phenomenological model parameterized by B and ∧. Fits to the data yielded B = 0.77 ±0.14 and ∧ = 0.21 ±0.04. These values implied that the hydrogen capture ratio in an equal mix of H2 and D2 was F(H₂D

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3

Hunter, Ian Norman. "The viscosity of gaseous mixtures." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.253386.

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4

McKenna, Fiona Christine. "Spectroscopic studies of gaseous nebulae." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263493.

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5

Kirk, Martin. "Reactions of gaseous borane intermediates." Thesis, University of Leeds, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305836.

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6

Clarke, Elizabeth Diane. "Probabilistic models of gaseous dispersion." Thesis, University of Sheffield, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387651.

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7

Bremer, Malcolm Neal. "The gaseous environment of quasars." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281988.

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8

Ho, Minh Tuan. "Kinetic modeling of the transient flows of the single gases and gaseous mixtures." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4741/document.

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Un gaz à l'intérieur d’un microsystème ou d’un milieu poreux est dans un état hors équilibre, car le libre parcours moyen des molécules est comparable à la dimension caractéristique du milieu. Ce même état degaz, appelé raréfié, se retrouve en haute altitude ou dans un équipement de vide à basse pression. Ces gaz raréfiés suivent des types d’écoulements qui peuvent être décrits par des modèles cinétiques dérivés de l'équation de Boltzmann. Dans ce travail nous présentons les principaux modèles et leurs mises en oeuvre numériquepour la simulation des écoulements de gaz raréfiés. Parmi les modèl

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9

Gal-Ed, Reuven. "Pulsating catalytic combustion of gaseous fuels." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/15649.

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10

Moss, Diane Patricia. "Gaseous ammonia exchange in wheat crops." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271216.

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11

Harrison, S. "The electrochemical epoxidation of gaseous alkenes." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.483149.

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12

Lusher, C. P. "Nuclear magnetic relaxation in gaseous helium." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356513.

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Longitudinal relaxation times T1 have been measured in 'He gas, using pulsed NMR, for number densities between 3x 1023 and 6x 102' spins/m' and temperatures between 0.6 and 15K. Relaxation takes place on or near the walls of the pyrex sample cells and measurements of Tl give information about the surface phases. A low temperature amplifier containing GaAs FET devices was developed to improve the spectrometer sensitivity. An amplifier noise temperature of 0.9 ± 0.5K was obtained at 1.16 MHz and an NMR signal was observed at 4.2K with the sensitivity being mainly limited by Johnson noise in the

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13

Robledo, Martinez A. "Space charge phenomena in gaseous insulation." Thesis, Cardiff University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373885.

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14

Callender, George. "Modelling partial discharge in gaseous voids." Thesis, University of Southampton, 2018. https://eprints.soton.ac.uk/420943/.

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The measurement of partial discharge (PD) activity is a commonly used tool to quantify the health of electrical insulation material in high voltage plant. Models of PD activity have been developed in order to provide insight into the physical conditions present in PD systems. Modern PD models typically use the approach taken in the work of Niemeyer in early 1990's, and so far have been primarily limited to investigating PD activity from simple controlled experiments. PD models have typically focused on PD activity in gaseous voids, which is also the case in this thesis. In this work a new PD a

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15

Wong, Ka Yin. "Gaseous simulation of diesel-type sprays." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47720.

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16

Arkili, Errol B. (Errol Bernard). "Gaseous flow in micron-sized channels." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12321.

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17

Hadgett, Paul Malcolm. "Simulation of gaseous transport in polymers." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621778.

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18

Hughes, K. J. "Chemistry of gaseous organosilicon reactive intermediates." Thesis, University of Leicester, 1987. http://hdl.handle.net/2381/33745.

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Chapter one provides a brief history and current state of knowledge of the chemistry of organosilicon reactive intermediates relevant to this thesis. Chapter two outlines the experimental techniques used in the majority of work carried out in this thesis. Chapter three describes an experimental investigation of the pyrolysis of 4-dimethylsilylbut-l-ene and 5-dimethylsilylpent-l-ene, with and without excess methylchloride as a silyl radical trap. The results of computer modelling of the pyrolysis of 4-dimethylsilylbut-1-ene with excess methylchloride are described, in which information concerni

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19

Chao, Tong Wa Knauss Wolfgang Gustav. "Gaseous detonation-driven fracture of tubes /." Diss., Pasadena, Calif. : California Institute of Technology, 2004. http://resolver.caltech.edu/CaltechETD:etd-04062004-165940.

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20

Pautet, Lucie. "Seismic imaging through a gaseous zone /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035911.

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21

Gibson, Hubert C. "Gaseous swelling and release in nuclear fuels during grain growth." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49103.

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A model of the generation and release of fission gas, as well as the total swelling over time, was created. It uses an ideal spherical fuel grain with a time-dependent radius. UO2 and quasi-homogeneous SBR MOX fuels were simulated with this model, and the results were compared to a fixed grain radius model of gaseous swelling. Gaseous swelling and fission gas release were calculated for temperatures from 1600 K to 2200 K. The grain growth of UO2 was found to decrease the time needed to saturate the intergranular boundaries as compared to simple diffusion without grain growth. Small temperature

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22

Verreault, Jimmy. "Initiation of gaseous detonation by conical projectiles." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107822.

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Initiation and stabilization of detonation by hypersonic conical projectiles launched into combustible gas mixtures is investigated. This phenomenon must be understood for the design and optimization of specific hypersonic propulsion devices, such as the oblique detonation wave engine and the ram accelerator. The criteria for detonation initiation by a projectile is also related to fundamental aspects of detonation research, such as the requirement for direct initiation of a detonation by a blast wave. Experimental results of this problem also offer useful references for validation of numerica

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23

Wilman, Richard John. "The gaseous environments of powerful active objects." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.622002.

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24

Saxton, Carl Graham. "Microporous adsorbents for trapping of gaseous pollutants." Thesis, University of Aberdeen, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.446326.

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Adsorption studies (xenon and iodine) in microporous materials have been carried out on various materials such as zeolites (FAU, MFI, SAV and CHA) and metal-organic frameworks (MOF-5, HKUST-1 and JUC-32). The as-synthesised and commercial zeolites containing Na<sup>+</sup>, Li<sup>+</sup> or K<sup>+</sup> cations and then subsequently ion-exchanged for other extra framework cations. The xenon adsorption in zeolites was interpreted using isosteric heats of adsorption (CHA) and also <sup>129</sup>Xe NMR (FAU). CHA type zeolites show a high affinity and capacity for xenon at low xenon pressures <

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25

Wijesinghe, Hettithanthrige Sanith 1974. "Hybrid atomistic-continuum formulations for gaseous flows." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17021.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.<br>Includes bibliographical references (p. 147-156).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Hybrid atomistic-continuum formulations allow the simulation of complex hydrodynamic phenomena at the nano and micro scales without the prohibitive cost of a fully atomistic approach. This is achieved through a domain decomposition strategy whereby the atomistic model is limited to regions of

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26

Hosseini, Sima, and Sima Hosseini. "Application of femtosecond filamentation in gaseous media." Doctoral thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/35019.

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Cette thèse décrit plusieurs résultats expérimentaux impliquant le phénomène de la filamentation laser qui se produit lorsque des impulsions laser ultrabrèves se progagent dans l'air avec une intensité de l'ordre de ~ 10¹³ W/cm2. Un laser titane-saphir est utilisé pour gé- nérer des impulsions femtosecondes dans l'infrarouge (800 nm). En raison de ses propriétés particulières, cette forme de propagation est étudiée pour de nombreuses applications. Nous nous concentrons dans cette thèse sur la télédétection et l'identification de polluants atmosph ériques. Notre objectif est d'améliorer les rés

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27

Bheemineni, Veerabhadrarao. "Gaseous corrosion of magnesium oxide in hydrogen /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487259125218742.

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28

Austin, Joanna Maria Shepherd J. E. Shepherd J. E. "The role of instability in gaseous detonation /." Diss., Pasadena, Calif. : California Institute of Technology, 2003. http://resolver.caltech.edu/CaltechETD:etd-05292003-150534.

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29

Marasco, Antonino <1984&gt. "The gaseous halo of the Milky Way." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5210/1/marasco_antonino_tesi.pdf.

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In the last decade, sensitive observations have revealed that disc galaxies are surrounded by multiphase gaseous halos produced by the circulation of gas from the discs to the environment and vice-versa. This Thesis is a study of the gaseous halo of the Milky Way carried out via the modelling of the HI emission and the available absorption-line data. We fitted simple kinematical models to the HI LAB Survey and found that the Galaxy has a massive (~3x10^8 Mo) HI halo extending a few kiloparsecs above the plane. This layer rotates more slowly than the disc and shows a global inflow motion, a k

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30

Marasco, Antonino <1984&gt. "The gaseous halo of the Milky Way." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5210/.

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In the last decade, sensitive observations have revealed that disc galaxies are surrounded by multiphase gaseous halos produced by the circulation of gas from the discs to the environment and vice-versa. This Thesis is a study of the gaseous halo of the Milky Way carried out via the modelling of the HI emission and the available absorption-line data. We fitted simple kinematical models to the HI LAB Survey and found that the Galaxy has a massive (~3x10^8 Mo) HI halo extending a few kiloparsecs above the plane. This layer rotates more slowly than the disc and shows a global inflow motion, a k

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31

Landin, Charles Melchor. "Dissolved gaseous mercury behavior in shallow water estuaries." [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-2098.

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32

Nomura, Hideko. "Angular Momentum Transfer in Dynamically Collapsing Gaseous Disks." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150830.

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33

Cushon, Geoffrey H. "Gaseous nitrogen transformations in a mature forest ecosystem." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24623.

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In mature forests, gains and losses of nitrogen may be dominated by the gaseous transformations, asymbiotic nitrogen fixation and biological denitrification. Both are reduction reactions and are affected by moisture conditions, temperature, pH, supply of organic carbon and the availability of mineral nitrogen. Gaseous nitrogen inputs, due to asymbiotic nitrogen fixation, and outputs, due to biological denitrification were quantified for a mature coniferous forest in southwestern British Columbia. Forest floor material, mineral soil, decaying wood, foliage and bark were incubated in an atmosph

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34

Moore, Colin. "Angle resolved collision induced decomposition of gaseous ions." Thesis, University of Warwick, 1987. http://wrap.warwick.ac.uk/99925/.

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This thesis describes a series of experiments undertaken to collect Angle Resolved Mass Spectra (ARMS) in order to investigate the scattering of ions during collisional activation. In particular, data were obtained to see if the angle resolved mass spectra of the scattered ions could be explained by assuming that the scattering angle θ was directly related to the energy gained by the ions during collisional activation. Initially data were obtained on a slightly modified commercially available mass spectrometer using the z-deflection method. The inherently poor angular resolution of this method

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35

Kemp, Ronald Jeffrey. "Measurement of gaseous mercury emissions from natural sources." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ61978.pdf.

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36

Boman, Christoffer. "Particulate and gaseous emissions from residential biomass combustion." Doctoral thesis, Umeå : Univ, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-501.

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37

Appling, Jeffrey Robert. "Gaseous charge transfer reactions of multiply charged ions." Diss., Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/27382.

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38

Snider, Graydon. "Homogeneous and heterogeneous oxidation of gaseous elemental mercury." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107726.

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Mercury is an atmospheric global pollutant with complex cycling behavior. Two-thirds of the mercury present in our atmosphere is anthropogenic in origin. Chemical oxidation of gaseous elemental mercury governs the deposition rate of mercury over most lakes, land, and oceans. A major uncertainty comes from the effect of atmospheric surfaces such as aerosols. Much research is devoted to mercury capture technologies to be used in coal fire power plants, which are the major source of anthropogenic emissions.This thesis is a report on oxidation kinetics and mechanistic studies relevant to mercury-s

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39

Makris, Aristidis. "The propagation of gaseous detonations in porous media." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41700.

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The propagation of a gaseous detonation wave into a porous medium has been studied experimentally and theoretically. The porous medium is composed of inert spheres of equal diameter contained within a detonation tube. The propagation mechanisms were elucidated by means of high-speed Schlieren and open shutter photography of the wave-particle interactions in 2-D obstacle arrays, to simulate the phenomenon in actual porous media. It is found that a Chapman-Jouguet (CJ) detonation can transmit into a porous medium filled with detonable gas and continue to propagate as a quasi-steady combustion wa

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40

Allen, Deborah. "The removal of gaseous pollutants during coal combustion." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335690.

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41

Atkinson, Sandra Jane. "Generation and structural characterisation of transient gaseous species." Thesis, University of Canterbury. Chemistry, 2015. http://hdl.handle.net/10092/10495.

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Gas electron diffraction (GED) is a technique that has been developed to study the molecular structure of species in the gas phase. This thesis focuses on the reconstruction of the Canterbury GED apparatus (moved from Edinburgh, UK) and the requirements for modifying the apparatus to incorporate a mass spectrometer (MS) so diffraction and MS data can be obtained within a single experiment. The combined GED-MS system has been identified in previous work in the Masters group as a necessary development for studying the structure of short-lived species generated in situ. This is particularly tru

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42

Mays, T. J. "Gaseous diffusion and pore structure in nuclear graphites." Thesis, University of Bath, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384640.

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43

Pratt, Emma Victoria. "Gaseous nitrogen emissions from caged laying hen manure." Thesis, Open University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429530.

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44

Douglas, K. M. "The formation, dissociation and reactivity of gaseous ions." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1338145/.

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This thesis presents the results of a series of experiential investigations into the formation, dissociation and reactivity of gaseous ions. Firstly, using a time-of-flight mass spectrometer coupled with a 2D ion coincidence technique, studies of the electron ionization of a number of small gas-phase molecules are presented. Relative partial ionization cross-sections (PICS) are derived for the formation of positively charged fragment ions, following electron ionization of H2S, CH3OH and CF3I. The 2D ion coincidence technique enables fragment ions formed by dissociative single, double, triple a

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45

Wallis, Anna Elizabeth. "Plasma-catalysis for the removal of gaseous pollutants." Thesis, University of Manchester, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542752.

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46

Imani, Jajarmi Ramin. "Acoustic separation of submicron particles in gaseous flows." Licentiate thesis, KTH, Mekanik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-167629.

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The separation of submicron particles suspended in gaseous flows is a problem of great importance and is the subject of sustained research efforts. This is motivated by several challenges presented by modern science and technology requiring high separation efficiencies for submicron particles.Continuous acoustic particles separation is a novel technique based on the acoustophoresis phenomenon, in which a particle within an acoustic field is manipulated using acoustic forces on its surface. This technique has the potential to overcome some of the limitations of common techniques for the separat

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47

Xiao, Qiang. "Dynamics of Gaseous Detonations with Lateral Strain Rates." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40946.

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Detonations in gases usually propagate with lateral strain rates, in either weakly confined or varying-cross-section or curved or even small-sized geometries. Lateral strain rates have been generally known to significantly impact the detonation dynamics, i.e., decreasing the propagation speeds lower than the theoretical Chapman-Jouguet (CJ) velocities, increasing the propagation limit pressures as well as cell sizes. Since the detonation-based engines require the reliable control of the accurate ignition and stable propagation of a detonation wave, it is desirable to have the predictive capabi

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48

Lopes, Tiago Neves. "VUV single photon gaseous photomultiplier with position capability." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/11780.

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Mestrado em Engenharia Física<br>A new position sensitive gas photomultiplier for the Vacuum Ultraviolet (VUV) region is presented in this work. The detector is composed by two THGEMs, followed by a 2D-THCOBRA being operated in Ne/CH4(5%), at 1 bar pressure in single photon mode. The 2D-THCOBRA is an hybrid microstructure which combines the robustness and the resistance to discharges of a THGEM with the two independent charge multiplication stages and the position discrimination of the 2D-MHSP. In this work the 2D-THCOBRA influence in the charge gain and IBF values was studied. The position

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49

Adefila, Kehinde. "Flow measurement and leakage detection of gaseous CO2." Thesis, University of Kent, 2015. https://kar.kent.ac.uk/49162/.

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In order to combat the climate change caused by increasing emissions of CO2 from industrial processes, Carbon Capture and Storage (CCS) technologies have been accepted worldwide to address these pressing global warming concerns. So as to efficiently manage material and financial losses across the entire stream, accurate accounting and monitoring through fiscal metering of CO2 in CCS transportation pipelines are core and required features for the deployment of CCS technologies. Moreover, these technical requirements are part of the legal compliance schemes and guidelines from various regulatory

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50

RAGUSA, ENRICO. "THE EVOLUTION OF BINARY SYSTEMS IN GASEOUS ENVIRONMENTS." Doctoral thesis, Università degli Studi di Milano, 2018. http://hdl.handle.net/2434/604177.

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Systems where a binary, that is two gravitationally bound objects orbiting their centre of mass, interacts with the surrounding gas or dust are extremely common in the Universe and involve a wide variety of different astrophysical objects (star + star, black hole + black hole, star + planet, or planet + moon). Among them, protoplanetary systems and black hole binaries (BHBs) are currently capturing the attention of the scientific community. Despite their very different nature and EM appearance, both protoplanetary and BHB systems are characterized by the presence of a gaseous accretion disc s

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