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Dissertations / Theses on the topic 'Energy distributions of desorbates'

Author: Grafiati

Published: 21 December 2024

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1

Del, Fré Samuel. "Études théoriques de la photodésorption d'analogues de glaces moléculaires interstellaires : application au monoxyde de carbone." Electronic Thesis or Diss., Université de Lille (2022-....), 2024. http://www.theses.fr/2024ULILR039.

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Des quantités inhabituelles de molécules en phase gazeuse sont détectées dans les régions froides (environ 10 K) du milieu interstellaire (ISM), principalement attribuées à la désorption non thermique de molécules depuis les glaces déposées sur les grains de poussière. En particulier, la désorption induite par les rayons ultraviolets du vide (photodésorption VUV) est considérée comme étant une voie de désorption majoritaire dans les régions de l'ISM dominées par les photons. Les investigations expérimentales ont révélé que dans les glaces pures de monoxyde de carbone (CO), espèce omniprésente

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2

MacKenzie, Todd. "New methods for deblending spectral energy distributions in confused imaging." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/56192.

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The submillimetre band is ideal for studying high-redshift star-forming galaxies, but such studies are hampered by the poor resolution of single-dish telescopes. Interferometric follow-up has shown that many sources are in fact comprised of multiple sources. For many such targets, confusion-limited Herschel observations that target the peak of their far-infrared emission are also available. Many methods for analysing these data have been developed, but most follow the traditional approach of extracting fluxes before model spectral energy distributions are fit, which erases degeneracies among f

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3

Hornsey, Richard Ian. "Factors affecting ion energy distributions in liquid metal ion sources." Thesis, University of Oxford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236154.

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4

Turrell, Arthur Edward. "Processes driving non-Maxwellian distributions in high energy density plasmas." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/18083.

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The purpose of this thesis is to explore the driving of non-Maxwellian distributions of particles in high energy density plasmas in a few select cases, with particular reference to efforts to produce a net gain in energy via inertial confinement fusion (ICF). Non-Maxwellian distributions are typically short-lived, as distributions are forced toward equilibrium by collisions, and are rarely static as a net transfer of energy must occur to sustain them. This makes non-Maxwellian distributions challenging to study with conventional approaches to plasma physics. The strategy adopted in this work t

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5

Yang, Guangyuan. "The Energy Goodness-of-fit Test for Univariate Stable Distributions." Bowling Green State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1339476355.

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6

Stins, O. W. M. "A Retarding Field Energy Analyser to measure the Energy Distributions of Liquid Metal Ion Sources." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-32306.

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7

Stins, O. W. M. "A Retarding Field Energy Analyser to measure the Energy Distributions of Liquid Metal Ion Sources." Forschungszentrum Rossendorf, 1994. https://hzdr.qucosa.de/id/qucosa%3A22057.

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8

Horwat, Stephen M. "Continuous distributions of non-dilatonic branes." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31235.

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In this thesis we construct new supergravity solutions representing continuous distributions of D3, M2, and M5-branes. These solutions are completely specified by the harmonic function H , which is determined by solving 12H=0 in carefully chosen coordinate systems with SO( n) x SO(D&perp; - n) symmetry. Afterwards, we calculate the corresponding charge distributions using a generalized Gauss's law type argument. These solutions are asymtoptically AdS in the near horizon limit.

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9

Fretwell, Tracey Ann. "Monte Carlo simulation of energy intensity distributions for electron beam lithography." Thesis, University of Manchester, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.576984.

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10

Dahlgren, David. "Monte Carlo simulations of Linear Energy Transfer distributions in radiation therapy." Thesis, Uppsala universitet, Högenergifysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446550.

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In radiotherapy, a quantity asked for by clinics when calculating a treatment plan, along withdose, is linear energy transfer. Linear energy transfer is defined as the absorbed energy intissue per particle track length and has been shown to increase with relative biologicaleffectiveness untill the overkilling effect. In this master thesis the dose averaged linear energytransfer from proton and carbon ion beams was simulated using the FLUKA multi purposeMonte Carlo code. The simulated distributions have been compared to algorithms fromRaySearch Laboratories AB in order to investigate the agreem

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11

Ignace, Richard. "Long-Wavelength, Free–Free Spectral Energy Distributions from Porous Stellar Winds." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etsu-works/2685.

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The influence of macroclumps for free–free spectral energy distributions (SEDs) of ionized winds is considered. The goal is to emphasize distinctions between microclumping and macroclumping effects. Microclumping can alter SED slopes and flux levels if the volume filling factor of the clumps varies with radius; however, the modifications are independent of the clump geometry. To what extent does macroclumping alter SED slopes and flux levels? In addressing the question, two specific types of macroclump geometries are explored: shell fragments (pancake-shaped) and spherical clumps. Analytic and

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12

Zhou, Li. "A Retarding-potential Analyzer for Measuring Energy Distributions in Electron Beams." PDXScholar, 1993. https://pdxscholar.library.pdx.edu/open_access_etds/4744.

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An energy analyzer for electron beams, based on a retarding-potential method, has been studied both experimentally and theoretically. In this method a potential energy barrier at right-angles to the beam acts as a high-pass energy filter allowing electrons having energies greater than the barrier height to pass through while turning back electrons of lower energy. The potential barrier in the present study was created by applying a negative potential to an electrode consisting of a 600/inch hexagonal copper mesh or an electrode having a pair of single apertures in series (compound aperture). T

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13

Vidal, García Alba. "Modeling and interpretation of the ultraviolet spectral energy distributions of primeval galaxies." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066667/document.

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Je combine de nouveaux modèles de production de radiations stellaires et de transport radiatif à travers le milieu interstellaire (MI). Cela permet de caractériser les étoiles ainsi que le MI neutre et ionisé dans des galaxies formant des étoiles (GFE), via des raies ultraviolettes dans leur spectre. J'évalue la fiabilité des modèles stellaires en ajustant dans l'ultraviolet les indices d'absorption mesurés dans les spectres stellaires de 10 amas d'étoiles dans le Grand Nuage de Magellan. Je montre que négliger l'échantillonnage stochastique de la fonction de masse initiale stellaire de ces am

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14

Evans, Thomas M. "The measurement and calculation of nanodosimetric energy distributions for electrons and photons." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/19264.

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15

Dickenson, Andrew C. "Measurement and simulation of ion energy distributions in a reactive ion etcher." Thesis, University of Bristol, 1994. http://hdl.handle.net/1983/2e692fca-5cd1-48da-bb7e-6bb76a1bb23b.

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16

Greenwood, Claire-Louise. "Energy and angular distributions of ions induced by electron stimulated desorption from surfaces." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240517.

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17

Eggers, Hans Christoph. "Intermittency, moments and correlations in distributions of particles created in high-energy collisions." Diss., The University of Arizona, 1991. http://hdl.handle.net/10150/185422.

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Intermittency, as introduced into multiparticle production by Bialas and Peschanski, has become a fruitful and rapidly growing industry. The original concept of intermittency in the form of the Alpha model is discussed in detail and suggestions for extensions are made. We analyze the factorial moments measured by different experimental collaborations in terms of their nontrivial many-particle correlations, the cumulants. A large fraction of measured moments is shown to originate in two-particle correlations. The validity of the Linked Pair ansatz is tested and found to be acceptable to fourth

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18

Dickson, Ewan Cameron Mackenzie. "Photospheric albedo and the measurement of energy and angular electron distributions in solar flares." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4196/.

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In this thesis I examine the role of Compton back-scatter of solar flare Hard X-rays, also known as albedo, in the inference of the parent electron spectrum. I consider how albedo affects measurements of the energy and angular distributions when the mean electron flux spectrum in a solar flare is inferred using regularised inversion techniques. The angular distribution of the accelerated electron spectrum is a key parameter in the understanding of the acceleration and propagation mechanisms that occur in solar flares. However, the anisotropy of energetic electrons is still a poorly known quant

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19

Ackerman, Jonathan R. "Unsteady energy separation and base pressure distributions in subsonic crossflow around a circular cylinder." Thesis, University of Leicester, 2004. http://hdl.handle.net/2381/30214.

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Eckert and Weise first measured time-averaged energy separation behind a circular cylinder in 1943- Although a significant amount of work has been carried out on the subject since Eckert and Weise's discovery no time-resolved measurements have been made of the phenomenon at high subsonic Mach numbers. The aim of this project was to make these measurements, along with those of surface pressure. Energy separation and base pressure are investigated at high subsonic Mach numbers, behind a circular cylinder in crossflow, for the first time.;The measurement of energy separation has involved developi

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20

Dodson-Robinson, Sarah E., Kate Y. L. Su, Geoff Bryden, Paul Harvey, and Joel D. Green. "HERSCHEL OBSERVATIONS AND UPDATED SPECTRAL ENERGY DISTRIBUTIONS OF FIVE SUNLIKE STARS WITH DEBRIS DISKS." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622672.

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Observations from the Herschel Space Observatory have more than doubled the number of wide debris disks orbiting Sunlike stars to include over 30 systems with R > 100 AU. Here we present new Herschel PACS and re-analyzed Spitzer MIPS photometry of five Sunlike stars with wide debris disks, from Kuiper belt size to R > 150 AU. The disk surrounding HD 105211 is well resolved, with an angular extent of >14" along the major axis, and the disks of HD 33636, HD 50554, and HD 52265 are extended beyond the PACS PSF size (50% of energy enclosed within radius 4.23"). HD 105211 also has a 24 mu m infrare

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21

Haman, John T. "The energy goodness-of-fit test and E-M type estimator forasymmetric Laplace distributions." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1524756256837676.

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22

Wilking, B. A., C. J. Lada, and E. R. Young. "IRAS Observations of the Rho Ophiuchi Infrared Cluster: Spectral Energy Distributions and Luminosity Function." Steward Observatory, The University of Arizona (Tucson, Arizona), 1988. http://hdl.handle.net/10150/623919.

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23

Perez-Ramos, Redamy. "DISTRIBUTIONS ET CORRÉLATIONS HADRONIQUES EN CHROMODYNAMIQUE QUANTIQUE DANS L'APPROXIMATION DES "PETIT X"." Phd thesis, Université Paris-Diderot - Paris VII, 2006. http://tel.archives-ouvertes.fr/tel-00108167.

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Dans le cadre de l'approximation MLLA de la Chromodynamique Quantique, nous calculons analytiquement, pour des jets hadroniques à très haute énergie, les distributions inclusives en fonction de l'impulsion transverse du hadron émergent, ainsi que les corrélations à 2 particules. Dans un premier temps, nous obtenons, pour le spectre inclusif et pour les corrélations, les solutions exactes des équations d'évolution partoniques, qui sont ensuites calculées à petit x dans l'approximation du ``spectre limite''. La méthode du col nous permet enfin de généraliser les résultats précédents au delà de c

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24

Hickox, Ryan C., Adam D. Myers, Jenny E. Greene, Kevin N. Hainline, Nadia L. Zakamska, and Michael A. DiPompeo. "Composite Spectral Energy Distributions and Infrared–Optical Colors of Type 1 and Type 2 Quasars." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626048.

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We present observed mid-infrared and optical colors and composite spectral energy distributions (SEDs) of type 1 (broad-line) and 2 (narrow-line) quasars selected from Sloan Digital Sky Survey (SDSS) spectroscopy. A significant fraction of powerful quasars are obscured by dust and are difficult to detect in optical photometric or spectroscopic surveys. However, these may be more easily identified on the basis of mid-infrared (MIR) colors and SEDs. Using samples of SDSS type 1 and 2 matched in redshift and [O III] luminosity, we produce composite rest-frame 0.2-15 mu m SEDs based on SDSS, UKIDS

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Jenner, Clare Elizabeth. "A new semi-analytical treatment of the effect of supernovae on ULIRG spectral energy distributions." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1446241/.

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This work presents a method for generating synthetic spectra of Ultra-Luminous Infrared Galaxies (ULIRGS) using AGN, HII region and supernovae source functions. The AGN element represents the far-infrared contribution to the ULIRG spectrum from an energetic central engine. It is modelled using a quasar source embedded in an axi-symmetric dusty torus. The radiative transfer of flux (RT) is then simulated and the AGN emergent spectral energy distributions (SEDs) generated. The HII region solution is then developed. A stellar evolutionary synthesis code is used to generate instantaneous burst (IS

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26

Opperman, Logan J. "Sequential Inference and Nonparametric Goodness-of-Fit Tests for Certain Types of Skewed Distributions." Bowling Green State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1560856288455652.

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27

Robitaille, Thomas Pierre. "Star formation across the galaxy : observations and modelling of the spectral energy distributions of young stars /." St Andrews, 2009. http://hdl.handle.net/10023/733.

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28

Robitaille, Thomas P. "Star formation across the galaxy : observations and modelling of the spectral energy distributions of young stars." Thesis, University of St Andrews, 2009. http://hdl.handle.net/10023/733.

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In the last few decades, the emergence of large-scale infrared surveys has led to a revolution in the study of star formation. In particular, NASA’s Spitzer Space Telescope has recently carried out mid- and far-infrared observations of numerous star formation regions with unprecedented resolution and sensitivity, and has uncovered thousands of forming stars. In combination with present and future large-scale near-infrared and sub-mm surveys, spectral energy distributions from near-infrared to mm wavelengths will be available for these thousands of young stars. Never before has there been such

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29

Assef, Roberto Jose. "Properties of Active Galactic Nuclei and Galaxies: Spectral Energy Distributions, Luminosity Functions and Black Hole Masses." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1281369360.

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30

Laidet, Julien. "High Energy Collisions of Dense Hadrons in Quantum Chromodynamics : LHC Phenomenology and Universality of Parton Distributions." Palaiseau, Ecole polytechnique, 2013. http://pastel.archives-ouvertes.fr/pastel-00875951.

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Lorsque l'impulsion longitudinale des partons contenus dans un hadron ultra-relativiste diminue, on observe un accroissement de leur densité. Quand la densité approche une valeur d'ordre dollar1/\alpha_sdollard, elle n'augmente plus, elle sature. Ces effets de haute densité semblent être correctement décrits par la théorie effective du "Color Glass Condensate". Du point de vue expérimental, le LHC est le meilleur outil jamais disponible pour atteindre la phase saturée de la matière hadronique. Pour cette raison, la physique de la saturation est une branche très active de la QCD dans les années

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31

Dance, Michael Raymond Jr. "Hydroxide Formation and Carbon Species Distributions During High-Temperature Kraft Black Liquor Gasification." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7189.

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This work focuses on high-temperature kraft black liquor gasification in the presence of H2O and CO2 in a laboratory-scale Laminar Entrained-Flow Reactor (LEFR). The effects of gasification conditions on hydroxide formation, carbon gasification rate, carbonate carbon and fixed carbon levels, alkali metal and sulfur species retention, and char yield were studied at atmospheric pressure and at 900-1000oC, and at residence times of 0.5-1.5 s. The results suggest that carbon gasification rates may be enhanced in the presence of H2O and CO2, with fixed carbon conversions of up to 95% at the ear

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32

Polowin, Joel Evan Carleton University Dissertation Chemistry. "The effects of potential energy surface features on product vibrational distributions for the reaction F + H [subscript] 2 -] HF + H." Ottawa, 1988.

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33

Ekanayake, Gemunu. "Determination of Stellar Parameters through the Use of All Available Flux Data and Model Spectral Energy Distributions." UKnowledge, 2017. http://uknowledge.uky.edu/physastron_etds/44.

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Basic stellar atmospheric parameters, such as effective temperature, surface gravity, and metallicity plays a vital role in the characterization of various stellar populations in the Milky Way. The Stellar parameters can be measured by adopting one or more observational techniques, such as spectroscopy, photometry, interferometry, etc. Finding new and innovative ways to combine these observational data to derive reliable stellar parameters and to use them to characterize some of the stellar populations in our galaxy is the main goal of this thesis. Our initial work, based on the spectroscopic

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34

Niyazov, Rustam. "Measurements of Correlated Pair Momentum Distributions in {sup 3}He(e,e{prime}pp)n with CLAS." Washington, D.C : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/824882-21uB5k/native/.

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Thesis (Ph.D.); Submitted to Old Dominion Univ., Norfolk, VA (US); 1 May 2003.<br>Published through the Information Bridge: DOE Scientific and Technical Information. "JLAB-PHY-03-36" "DOE/ER/40150-2739" Rustam Niyazov. 05/01/2003. Report is also available in paper and microfiche from NTIS.

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Kelly, Madeleine N. "The Temperature Dependence of Grain Boundary Complexion Transitions and Their Effect on the Grain Boundary Character and Energy Distributions." Thesis, Carnegie Mellon University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10604582.

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<p> Abrupt changes in grain boundary energy (GBE) and character are associated with a change in GB complexion, GB mobility and exaggerated grain growth. In this thesis, complexion transitions and their effect of relative GBE and GB character distributions (GBCD) are studied for ceramics: europium doped spinel (Eu doped spinel), yttria doped (Y-doped), undoped alumina (Al<sub> 2</sub>O<sub>3</sub>), and strontium titanate (SrTiO<sub>3</sub>). </p><p> The population of GB planes (GBPD) of Eu doped spinel was investigated at temperatures before and after a previously identified a complexion tra

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Kelly, Madeleine Nicole. "The Temperature Dependence of Grain Boundary Complexion Transitions and Their Effect on the Grain Boundary Character and Energy Distributions." Research Showcase @ CMU, 2017. http://repository.cmu.edu/dissertations/1005.

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Bezuidenhout, Jacques. "Cross sections and analysing power energy-sharing distributions of valence (p,2p)-knockout from 208Pb with a projectile of 200MeV." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51668.

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Thesis (MSc)--Stellenbosch University, 2000.<br>ENGLISH ABSTRACT: The aim of this work was to study the 208Pb(p,2p)207Tl quasi-free knockout process. The experimental data were measured at the National Accelerator Centre using incident polarised protons of 200 MeV. The two scattered particles, from the knockout reaction, were detected in coincidence and their energies were determined using a magnetic spectrometer and a solid state detector telescope. Cross section and analysing power energy distributions were extracted from the experimental measurements and these were compared with th

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Lawther, D., M. Vestergaard, S. Raimundo, and D. Grupe. "A catalogue of optical to X-ray spectral energy distributions of z ≈ 2 quasars observed with Swift – I. First results." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/623803.

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We present the Swift optical to X-ray spectral energy distributions (SEDs) of 44 quasars at redshifts z approximate to 2 observed by Swift, part of a larger program to establish and characterize the optical through X-ray SEDs of moderate-redshift quasars. Here, we outline our analysis approach and present preliminary analysis and results for the first third of the full quasar sample. Not all quasars in the sample are detected in X-rays; all of the X-ray-detected objects so far are radio loud. As expected for radio-loud objects, they are X-ray bright relative to radioquiet quasars of comparable

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Okafor, Izuchukwu Francis. "Influence of Circumferential Spans of Heat Flux Distributions on Secondary Flow, Heat Transfer and Friction Factors for a Linear Focusing Solar Collector Type Absorber Tube." Thesis, University of Pretoria, 2017. http://hdl.handle.net/2263/64173.

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Solar collector absorber tubes play a critical role in converting incident solar heat flux into absorbed thermal energy and transferring it to a heat transfer fluid. In this study a single horizontally orientated absorber tube was investigated numerically in terms of the influence of different circumferential spans of symmetrical and asymmetrical heat flux distributions on buoyancy-driven secondary flow, internal heat transfer and friction factor characteristics. Three types of circumferential heat flux boundaries were considered, namely fully uniform, partial uniform and sinusoidal non-unifor

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Barcellos, Luiz Felipe Fracasso Chaves. "On a continuous energy Monte Carlo simulator for neutron interactions in reactor core material considering up-scattering effects in the thermal energy region." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/142675.

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Neste trabalho o transporte de nêutrons é simulado em materiais presentes no núcleo de reatores. O espectro de nêutrons é decomposto como uma soma de três distribuições de probabilidade. Duas das distribuições preservam sua forma com o tempo, mas não necessariamente sua integral. Uma das duas distribuições é devido ao espectro de fissão, isto é, altas energias de nêutrons, a outra é uma distribuição de Maxwell-Boltzmann para nêutrons de baixas energias (térmicos). A terceira distribuição tem uma forma a priori desconhecida e que pode variar com o tempo, sendo determinada a partir de uma simula

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Mabiala, Justin. "Analyzing power and cross section distributions of the 12C (p,pα)8Be cluster knockout reaction at an incident energy of 100 MeV". Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4012.

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Thesis (PhD (Physics))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The (p, pα) reaction on 12C was investigated experimentally using polarized incident protons of 100 MeV. Coincident data, which were obtained at ten quasifree angle pairs for proton angles ranging from 25◦ to 110◦, were analyzed in terms of the distorted-wave impulse approximation (DWIA). Calculated energy-sharing cross section and analyzing power distributions reproduce the data reasonably well. The observed agreement allows the extraction of distorted momentum distributions from experimental data. These distr

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Bernhard, John Michael. "Work Function Study of Iridium Oxide and Molybdenum Using UPS and Simultaneous Fowler-Nordheim I-V Plots with Field Emission Energy Distributions." Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc2211/.

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The characterization of work functions and field emission stability for molybdenum and iridium oxide coatings was examined. Single emission tips and flat samples of molybdenum and iridium oxide were prepared for characterization. The flat samples were characterized using X-ray Photoelectron Spectroscopy and X-ray diffraction to determine elemental composition, chemical shift, and crystal structure. Flat coatings of iridium oxide were also scanned by Atomic Force Microscopy to examine topography. Work functions were characterized by Ultraviolet Photoelectron Spectroscopy from the flat samples a

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Taulbee, Timothy Dale. "Measurement and model prediction of proton-recoil track length distributions in NTA film dosimeters for neutron energy spectroscopy and retrospective dose assessment." Cincinnati, Ohio : University of Cincinnati, 2009. http://www.ohiolink.edu/etd/view.cgi?acc_num=ucin1235764236.

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Thesis (Ph.D.)--University of Cincinnati, 2009.<br>Advisors: Henry Spitz PhD (Committee Chair), Bingjing Su PhD (Committee Member), John Christenson PhD (Committee Member). Title from electronic thesis title page (viewed May 1, 2009). Keywords: NTA; proton-recoil; neutron spectroscopy; dose assessment; track length; Monte Carlo; neutron transport; neutron interactions. Includes abstract. Includes bibliographical references.

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Lanz, Lauranne. "Constraining the Evolution of Galaxies over the Interaction Sequence with Multiwavelength Observations and Simulations." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11129.

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Interactions are crucial for galaxy formation and profoundly affect their evolution. However, our understanding of the impact of interactions on star formation and activity of the central supermassive black hole remains incomplete. In the canonical picture of the interaction process, these processes are expected to undergo a strong enhancement, but some recent studies have not found this prediction to be true in a statistically meaningful sense. This thesis uses a sample of local interactions observed from the ultraviolet to the far-infrared and a suite of N-body hydrodynamic simulations of in

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Kamenetska, Masha. "Modeling the affect of dark matter distributions in the Milky Way on the component of the cosmic rays energy spectrum as incident on Earth." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32902.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (leaves 51-53).<br>In this thesis, we investigate the effect of dark matter distribution in the galaxy on the positron spectrum on earth. We wrote code to simulate two district dark matter distribution functions as well as the annihilations which convert them into positrons. We then channeled the results into a galaxy propagation software package GALPROP and obtained a positron spectrum on earth. Our results suggest that while no dramatic differences emerge in the spectrum as a

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Laidet, Julien. "Collisions à Haute Energie de Hadrons Denses en Chromodynamique Quantique : Phénoménologie du LHC et Universalité des Distributions de Partons." Phd thesis, Ecole Polytechnique X, 2013. http://pastel.archives-ouvertes.fr/pastel-00875951.

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Lorsque l'impulsion longitudinale des partons contenus dans un hadron ultra-relativiste diminue, on observe un accroissement de leur densité. Quand la densité approche une valeur d'ordre $1/\alpha_s$, elle n'augmente plus, elle sature. Ces effets de haute densité semblent être correctement décrits par la théorie effective du "Color Glass Condensate". Du point de vue expérimental, le LHC est le meilleur outil jamais disponible pour atteindre la phase saturée de la matière hadronique. Pour cette raison, la physique de la saturation est une branche très active de la QCD dans les années passées et

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Mowat, Christopher. "Star formation in the Gould Belt : a submillimetre perspective." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/34652.

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This thesis presents my work characterising star formation in Gould Belt molecular clouds using submillimetre observations from SCUBA-2 on the James Clerk Maxwell Telescope (JCMT). I use these observations alongside data from previously published surveys using instruments including the Spitzer Space Telescope. I investigate the effect of including submillimetre data on the numbers, classifications and lifetimes of Young Stellar Objects (YSOs) in Gould Belt molecular clouds, particularly protostars. Following a literature review, I use SCUBA-2 450 and 850 μm observations to characterise star fo

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Bäckebo, Markus. "The influence of particle size distribution on bio-coal gasification rate as related to packed beds of particles." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79084.

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This thesis is a part of a collaboration between Höganäs AB and Luleå University of Technology, aiming at replacing fossil process coal with bio-coal in their sponge iron process. The difference in gasification reactivity, i.e. reaction rate, between fossil coals and bio-coals is the major challenge in the endeavor to decrease the climate impact of the existing process. The goal of this thesis is to develop a model of reaction rate for bio-coals in relation to particle size distribution. Different particle size distributions were combined and tested to see how that affects the effective reacti

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Beauvais, March Hélène. "Modelisation des distributions de dose sur l'axe pour les faisceaux de photons de haute energie utilises en radiotherapie." Toulouse 3, 1987. http://www.theses.fr/1987TOU30074.

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He, Yanping. "Representations of boundary layer cloudiness and surface wind probability distributions in subtropical marine stratus and stratocumulus regions." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22585.

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Thesis (Ph. D.)--Earth and Atmospheric Sciences, Georgia Institute of Technology, 2007.<br>Committee Chair: Dr. Robert E. Dickinson; Committee Member: Dr. Irina Sokolik; Committee Member: Dr. Judth Curry; Committee Member: Dr. Peter Webster; Committee Member: Dr. Rong Fu.

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