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Dissertations / Theses on the topic 'Relativistic processe'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Glass, John T. "Relativistic ion-atom collision processes." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282153.

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2

Dunkel, Jörn. "Relativistic Brownian motion and diffusion processes." kostenfrei, 2008. http://d-nb.info/991318757/34.

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3

Jaroschek, Claus. "Critical Kinetic Plasma Processes In Relativistic Astrophysics." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-46601.

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4

Jamil, Omar. "A theoretical study of relativistic jets and accretion processes." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/161189/.

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The following work explores different aspects of the disc:jet connection in X-ray binaries. There is a detailed description of a new jet model (iShocks) that is used, firstly, to address the re-energization problem in the conical jet geometries. The adiabatic energy losses suffered by conical jets are successfully countered to reproduce the canonical flat/inverted synchrotron spectrum associated with compact radio jets. The iShocks model uses discrete packets of plasma, or shells, to simulate a jet. The shell collisions give rise to the shocks that are used to re-energize the emitting electron

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5

Postavaru, Octavian [Verfasser]. "Strong-field relativistic processes in highly charged ions / Octavian Postavaru." Heidelberg : Universitätsbibliothek Heidelberg, 2010. http://d-nb.info/1024909743/34.

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6

Chen, Guo-Xin. "Relativistic close coupling calculations for fundamental atomic processes in astrophysics." Columbus, Ohio : Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1078938510.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xxvi, 249 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Anil K. Pradhan, Dept. of Astronomy. Includes bibliographical references (p. 237-249).

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7

Melzani, Mickaël. "Reconnexion magnétique non-collisionelle dans les plasmas relativistes et simulations particle-in-cell." Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0946/document.

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L'objectif de cette thèse est l'étude de la reconnexion magnétique dans les plasmas non-collisionels et relativistes. De tels plasmas sont présents dans divers objets astrophysiques (MQs, AGNs, GRBs...), où la reconnexion pourrait expliquer la production de particules et de radiation de haute énergie, un chauffage, ou des jets. Une compréhension fondamentale de la reconnexion n'est cependant toujours pas acquise, en particulier dans les plasmas relativistes ion-électron. Nous présentons d'abord les bases de la reconnexion magnétique. Nous démontrons des résultats particuliers à la physique des

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8

Tardif, Camille. "Etude infinitésimale et asymptotique de certains flots stochastiques relativistes." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00703181.

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Nous étudions certains processus de Lévy à valeurs dans les groupes d'isométries respectifs des espace-temps de Minkowski, de De Sitter et de Anti-De-Sitter. Le groupe d'isométries est vu comme le fibré des repères de l'espace-temps et les processus de Lévy considérés se projettent sur le fibré unitaire en un processus markovien relativiste ; c'est-à-dire que les trajectoires dans l'espace-temps sont de genre temps et que le générateur est invariant par les isométries. Dans la première partie nous adaptons pour les diffusions hypoelliptiques générales un résultat de Ben Arous et Gradinaru conc

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9

Fitoussi, Thomas. "Les cascades électromagnétiques cosmologiques comme sondes du milieu intergalactique." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30235/document.

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Cette thèse vise à étudier le phénomène dit de " cascades électromagnétiques cosmologiques ". Ces cascades sont typiquement générées dans le milieu intergalactique par l'absorption de rayons gamma sur les photons du fond optique / UV et par la production de paires électron / positron associés. Ces leptons eux-mêmes interagissent avec les photons du fond diffus cosmologique via diffusion inverse Compton pour produire de nouveaux rayons gamma qui eux même peuvent s'annihiler, générant à partir d'un unique photon primaire toute une gerbe de photons et de particules secondaires. D'un point de vue

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10

Lundman, Christoffer. "Photospheric emission from structured, relativistic jets : applications to gamma-ray burst spectra and polarization." Doctoral thesis, KTH, Partikel- och astropartikelfysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-136178.

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The radiative mechanism responsible for the prompt gamma-ray burst (GRB) emission remains elusive. For the last decade, optically thin synchrotron emission from shocks internal to the GRB jet appeared to be the most plausible explanation. However, the synchrotron interpretation is incompatible with a significant fraction of GRB observations, highlighting the need for new ideas. In this thesis, it is shown that the narrow, dominating component of the prompt emission from the bright GRB090902B is initially consistent only with emission released at the optically thick jet photosphere. However, th

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11

Leonardi, Andrea. "La visualizzabilità dei processi fisici: dalla meccanica quantistica non relativistica alla gravità quantistica." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23939/.

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Per la fisica classica, la visualizzabilità era un aspetto implicito e scontato della teoria, un approccio intuitivo e naturale allo studio dei fenomeni. Nei primi del ‘900, l’esplicitazione della visualizzabilità entrava in contrasto con i nuovi risultati teorici e sperimentali portando Heisenberg a proporre una rivoluzione epistemologica: la fisica microscopica non può e non deve essere visualizzabile. A partire dal termine della Seconda guerra mondiale, le redini della fisica teorica passavano ai fisici statunitensi e il loro approccio epistemologicamente più morbido ripropone la visuali

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12

Lefa, Eva [Verfasser], and Felix A. [Akademischer Betreuer] Aharonian. "Non-thermal Radiation Processes in Relativistic Outflows from AGN / Eva Lefa ; Betreuer: Felix A. Aharonian." Heidelberg : Universitätsbibliothek Heidelberg, 2012. http://d-nb.info/1180607813/34.

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13

Plotnikov, Illya. "Ondes de choc relativistes." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00961589.

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La formation et l'activité des objets compacts, tels que Trous Noirs ou étoiles à Neutrons, s'accompagne couramment d'éjection de matière ionisée sous forme de jets à la vitesse proche de celle de la lumière (vitesses relativistes). Se propageant dans le milieu environnant, par exemple Milieu Interstellaire, ces jets conduisent inéluctablement à la formation d'ondes de choc relativistes. Une forte turbulence magnétique et une population d'électrons accélérés sont requises afin de tenir compte de l'émission radiative non-thermique de ces chocs. L'approche naturelle de ce problème, décrivant de

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14

Souza, Rubin Assis da Silveira. "A decisão judicial e a filosofia relativista de Hans Kelsen: uma abordagem hermenêutica." reponame:Repositório Institucional da UFSC, 2015. https://repositorio.ufsc.br/xmlui/handle/123456789/132983.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Jurídicas, Programa de Pós-Graduação em Direito, Florianópolis, 2015.<br>Made available in DSpace on 2015-05-19T04:09:08Z (GMT). No. of bitstreams: 1 333234.pdf: 1646853 bytes, checksum: c89773cdd60d0aa569ac7cca678d83e4 (MD5) Previous issue date: 2015<br>A presente dissertação tem como tema central a proposta da abordagem hermenêutica da decisão judicial em Hans Kelsen considerando seu relativismo filosófico. No primeiro momento expõe a concepção de decisão judicial no autor e as suas reformulações conceituai

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15

Moriyama, Kotaro. "New methods for probing black-hole space-time based on infalling gas clouds." Kyoto University, 2018. http://hdl.handle.net/2433/232254.

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16

Alexander, K. D., T. Laskar, E. Berger, et al. "A Reverse Shock and Unusual Radio Properties in GRB 160625B." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626042.

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We present multi-wavelength observations and modeling of the exceptionally bright long gamma-ray burst GRB 160625B. The optical and X-ray data are well fit by synchrotron emission from a collimated blastwave with an opening angle of theta(j) approximate to 3 degrees.6 and kinetic energy of E-K approximate to 2 x 10(51) erg, propagating into a low-density (n approximate to 5 x 10(-5) cm(-3)) medium with a uniform profile. The forward shock is sub-dominant in the radio band; instead, the radio emission is dominated by two additional components. The first component is consistent with emission fro

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17

DIltz, Christopher S. "Time Dependent Leptonic and Lepto-Hadronic Modeling of Blazar Emission." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1459506010.

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18

Venter, Christo. "The effect of general relativistic frame dragging on millisecond pulsar visibility for the H.E.S.S. telescope / C. Venter." Thesis, North-West University, 2004. http://hdl.handle.net/10394/215.

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It has been noted by several authors that General Relativistic frame dragging in rotating neutron stars is a first order effect which has to be included in a self-consistent model of pulsar magnetospheric structure and associated radiation and transport processes. To this end, I undertook the present study with the aim of investigating the effect of General Relativity (GR) on millisecond pulsar (MSP) visibility. I developed a numerical code for simulating a pulsar magnetosphere, incorporating the GR-corrected expressions for the electric potential and field. I included curvature radiation (CR)

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19

Johannsen, Tim. "Testing General Relativity in the Strong-Field Regime with Observations of Black Holes in the Electromagnetic Spectrum." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238893.

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General relativity has been tested by many experiments, which, however, almost exclusively probe weak spacetime curvatures. In this thesis, I create two frameworks for testing general relativity in the strong-field regime with observations of black holes in the electromagnetic spectrum using current or near-future instruments. In the first part, I design tests of the no-hair theorem, which uniquely characterizes the nature of black holes in terms of their masses and spins in general relativity and which states that these compact objects are described by the Kerr metric. I investigate a quasi-K

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20

Vega, Garcia Laura [Verfasser], A. [Gutachter] Eckart, and J. A. [Gutachter] Zensus. "Space VLBI studies of internal structure and physical processes in extragalactic relativistic jets / Laura Vega Garcia ; Gutachter: A. Eckart, J. A. Zensus." Köln : Universitäts- und Stadtbibliothek Köln, 2018. http://d-nb.info/1180601572/34.

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21

Patel, Gayatri. "How 'universal' is the United Nations' universal periodic review process? : an examination from a cultural relativist perspective." Thesis, University of Leicester, 2016. http://hdl.handle.net/2381/37501.

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This thesis explores the United Nations’ human rights monitoring mechanism, the Universal Periodic Review (UPR) process. The aim of the UPR process is to peer review states’ human rights records through an interactive dialogue session. One of the core elements of the review process is its claim of universality, which is based on two grounds: first, the universal applicability of the process, and second, the normative claim of universalism that is embedded in the operation of the process. Focusing on the second claim of universalism, I challenge the normative claim of universality of the proces

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22

Wang, Xiang-Peng [Verfasser], and Bernd [Akademischer Betreuer] Kniehl. "Inclusive charmonium production via Upsilon decayand break-down of non-relativistic QCD factorization in double quarkonia processes / Xiang-Peng Wang ; Betreuer: Bernd Kniehl." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2018. http://d-nb.info/1162621842/34.

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23

Beerwerth, Randolf [Verfasser], Stephan [Gutachter] Fritzsche, J. Gutachter] Bieron, and Tomas [Gutachter] [Brage. "Electron correlation in relativistic multiconfiguration calculations of isotope shift parameters, hyperfine coupling constants and atomic processes / Randolf Beerwerth ; Gutachter: Stephan Fritzsche, J. Bieron, Tomas Brage." Jena : Friedrich-Schiller-Universität Jena, 2019. http://d-nb.info/1206542586/34.

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24

Souza, Ulisses Gulart de. "Medida da produção de hádrons estranhos e estudo do processo de hadronização em colisões entre íons pesados relativísticos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-01122014-141659/.

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O principal objetivo de experimentos envolvendo colisões de íons pesados relativísticos é estudar a matéria nuclear sob condições extremas de temperatura e densidade. Sob tais condições, acredita-se que a matéria transite para um novo estado no qual quarks e glúons deixem de estar confinados, o plasma de quarks e glúons (PQG). A produção de partículas estranhas é uma importante ferramenta para a caracterização desse novo estado. O aumento da produção dessas partículas já era considerado como sendo um possível sinal para a existência do plasma de quarks e glúons mesmo antes da obtenção dos prim

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25

Faßhauer, Elke [Verfasser], and Markus [Akademischer Betreuer] Pernpointner. "Investigation of Relativistic Effects in Electronic Decay Processes in Small and Large Noble Gas Clusters by Ab Initio and New Simulation Approaches / Elke Faßhauer ; Betreuer: Markus Pernpointner." Heidelberg : Universitätsbibliothek Heidelberg, 2014. http://d-nb.info/1179925459/34.

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26

Tomei, Niccolò. "GRMHD simulations of thick accretion disks in the Event Horizon Telescope era: the role of the mean-field dynamo mechanism." Doctoral thesis, 2022. http://hdl.handle.net/2158/1264722.

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The baryonic matter of the Universe is found almost entirely in the form of plasma, or ionized gas where the moving charges interact with each other through the self-generated currents and the related magnetic fields within a highly material conductive. The energy contained in the plasma in terms of the magnetic field is usually comparable to the kinetic and/or thermal energy of the plasma itself, and many violent observed phenomena are attributable to the sudden release of magnetic energy (e.g. flares and coronal mass ejection in the Sun, gamma ray bursts, gamma flare in magnetars, rel

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27

(8803361), Yonggang Luo. "Radiative Processes in Relativistic Astrophysical Plasmas." Thesis, 2020.

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Synchrotron radiation and inverse Compton (IC) scattering are the two most essential radiation mechanisms in high energy astrophysics. Synchrotron radiation typically dominates lower energy emission, up to GeV, and IC scattering dominates higher energy gamma-ray emission. In this work, radiation codes are developed to calculate broadband synchrotron and IC spectra for relativistic astrophysical sources: Pulsar Wind Nebulae (PWNe) and Gamma-Ray Bursts (GRBs). Our robust radiation code takes into account varying intrinsic plasma properties (e.g., magnetic field evolution), various inverse Com

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28

Dunkel, Jörn [Verfasser]. "Relativistic Brownian motion and diffusion processes / eingereicht von Jörn Dunkel." 2008. http://d-nb.info/991318757/34.

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29

Jaroschek, Claus H. [Verfasser]. "Critical kinetic plasma processes in relativistic astrophysics / vorgelegt von Claus H. Jaroschek." 2005. http://d-nb.info/978071425/34.

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30

Karmakar, Anupam [Verfasser]. "Theory and simulations of nonlinear and inelastic processes in relativistic laser plasma interactions / vorgelegt von Anupam Karmakar." 2008. http://d-nb.info/989798828/34.

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31

MacDonald, Nicholas Roy. "Order & disorder: a study of the flaring properties and polarized emission of blazars." Thesis, 2017. https://hdl.handle.net/2144/23367.

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Blazars are the most luminous persistent and enigmatic objects in the sky. They constitute a sub-class of active galactic nuclei (AGN) whose relativistic plasma jets are closely aligned to our line of sight. By monitoring the polarized emission of these jets and subsequently modeling flares in the high-energy emission, we are able to gain insight into the parsec-scale physics of the jets close to the central engines. My dissertation develops and augments several theoretical models of high-energy blazar emission. The vast majority of gamma-ray flares detected in blazars are highly corre

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32

Vieyro, Florencia Laura. "Efectos de partículas relativistas en el entorno de agujeros negros." Tesis, 2013. http://hdl.handle.net/10915/32866.

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En la presente Tesis se realiza un estudio de los procesos físicos que producen la emisión electromagnética y de neutrinos a altas energías en la vecindad de agujeros negros estelares que acretan materia. Se estudia la inyección de partículas no térmicas en la corona de agujeros negros galácticos. Primero se caracteriza la región de interacción, detallando propiedades físicas básicas de los sistemas en estudio. Inicialmente se inyecta una población de electrones y protones relativistas, considerándose también la generación de partículas secundarias (piones, muones y pares electrón/positrón).

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33

Lötstedt, Erik [Verfasser]. "Laser-assisted second-order relativistic QED processes : Bremsstrahlung and pair creation modified by a strong electromagnetic wave field / presented by Erik Lötstedt." 2008. http://d-nb.info/989273636/34.

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