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Dissertations / Theses on the topic 'Mass/Energy Einstein equation'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Karhu, Robin. "Targeted Energy Transfer in Bose-Einstein Condensates." Thesis, Linköpings universitet, Teoretisk Fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-98279.

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Targeted Energy Transfer is a resonance phenomenon in coupled anharmonic oscillators. In this thesis we investigate if the concept of Targeted Energy Transfer is applicable to Bose-Einsteain condensates in optical lattices. The model used to describe Bose-Einstein condensates in optical lattices is based on the Gross-Pitaevskii equation. Targeted Energy Transfer in these systems would correspond to energy being transferred from one lattice site to another. We also try to expand the concept of Targeted Energy Transfer to a system consisting of three sites, where one of the sites are considered

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2

October, Faith Joy. "Transverse and longitudinal Bose-Einstein correlations in antiproton-proton reactions at centre-of-mass energy 630 GeV." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53200.

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Thesis (MSc)--Stellenbosch University, 2002.<br>ENGLISH ABSTRACT: We use Hanbury-Brown Twiss interferometry to determine Bose-Einstein correlations in the transverse and longitudinal directions. By using these two directions, we are able to determine the shape of the pion emitting source. The analysis is done with the UA1 (1985) data for pp collisions at Vs = 630 GeV. Two frames of reference, namely the laboratory frame and the Longitudinal Center-of-Mass System (LCMS) are used. A fit to a two-dimensional Gaussian parametrization yields good results. In the laboratory frame, an oblate fo

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3

Civin, Damon. "Stability of charged rotating black holes for linear scalar perturbations." Thesis, University of Cambridge, 2015. https://www.repository.cam.ac.uk/handle/1810/247397.

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In this thesis, the stability of the family of subextremal Kerr-Newman space- times is studied in the case of linear scalar perturbations. That is, nondegenerate energy bounds (NEB) and integrated local energy decay (ILED) results are proved for solutions of the wave equation on the domain of outer communications. The main obstacles to the proof of these results are superradiance, trapping and their interaction. These difficulties are surmounted by localising solutions of the wave equation in phase space and applying the vector field method. Miraculously, as in the Kerr case, superradiance and

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4

Rizzo, Carmelo. "Symmetry Energy Effects in Low Energy Heavy Ion Collisions with Exotic Beams." Thesis, Università degli Studi di Catania, 2011. http://hdl.handle.net/10761/124.

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We investigate the reaction path followed by Heavy Ion Collisions with exotic nuclear beams at low energies. The evolution of the system is described by a Stochastic Mean Field transport equation (SMF), where two parameterizations for the density dependence of symmetry energy (Asysoft and Asystiff) are implemented, allowing one to explore the sensitivity of the results to this ingredient of the nuclear interaction. We report the properties of the prompt dipole radiation, produced via a collective bremsstrahlung mechanism, in fusion reactions with exotic beams. We show that the gamma yield is s

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5

VILAR, NETA Deusalete Câmara. "Defeitos e Modelos de Quintessência." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/2135.

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Submitted by Emanuel Varela Cardoso (emanuel.varela@ufcg.edu.br) on 2018-11-06T18:02:15Z No. of bitstreams: 1 DEUSALETE CÂMARA VILAR NETA – DISSERTAÇÃO (PPGFísica) 2016.pdf: 962651 bytes, checksum: a355f6b434b034d2c99fa76a8d757ea5 (MD5)<br>Made available in DSpace on 2018-11-06T18:02:15Z (GMT). No. of bitstreams: 1 DEUSALETE CÂMARA VILAR NETA – DISSERTAÇÃO (PPGFísica) 2016.pdf: 962651 bytes, checksum: a355f6b434b034d2c99fa76a8d757ea5 (MD5) Previous issue date: 2016-08<br>Capes<br>Modelos cosmológicos envolvendo campos escalares permitem a descrição de uma fase de expansão cósmica acelerada e

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6

Holmgren, Tomas. "Emissions of organic compounds from technosphere articles : Measurements and modeling of mass transfer from consumer goods and building materials to air and water." Doctoral thesis, Umeå universitet, Kemiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-66363.

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This thesis describes the development of a generic model for predicting the emissions of organic compounds from materials used in the manufacture of various goods and products. Many products contain organic substances that are not bound to the matrix formed by their constituent materials and are thus able to dissociate from the material and become transferred into the surrounding environment. A wide range of materials and products are used in modern societies, and many compounds deriving from these materials are regarded as emerging pollutants in both indoor and outdoor environments. The model

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7

Sharpe, Jenny-Kay. "Body composition and energy expenditure in men with schizophrenia." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16961/1/Jenny-Kay_Sharpe_Thesis.pdf.

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There is an increase in the prevalence of obesity among people with schizophrenia thought to be due in part to the weight enhancing side-effects of medications commonly used to treat the symptoms of schizophrenia. Despite the deleterious health effects associated with obesity and its impact on quality of life and medication compliance, little is known about body composition and energy expenditure in this clinical group. The primary purpose of this thesis was to enhance understanding of body composition and energy expenditure, particularly resting energy expenditure in men with schizophrenia wh

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8

Sharpe, Jenny-Kay. "Body composition and energy expenditure in men with schizophrenia." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16961/.

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There is an increase in the prevalence of obesity among people with schizophrenia thought to be due in part to the weight enhancing side-effects of medications commonly used to treat the symptoms of schizophrenia. Despite the deleterious health effects associated with obesity and its impact on quality of life and medication compliance, little is known about body composition and energy expenditure in this clinical group. The primary purpose of this thesis was to enhance understanding of body composition and energy expenditure, particularly resting energy expenditure in men with schizophrenia wh

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9

Metsios, Giorgos S. "Metabolism and body composition in chronic inflammatory arthritis : prevention and intervention through pharmaceutical and physical means." Thesis, University of Wolverhampton, 2007. http://hdl.handle.net/2436/15396.

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Background: Rheumatoid arthritis (RA) is characterised by excessive production of tumour necrosis factor alpha (TNFα). This leads to rheumatoid cachexia, a condition characterised by increased resting energy expenditure (REE) and loss of fat-free mass (FFM) leading to functional disability, decreased strength and balance. The aims of this research work was to: a) to develop a new REE equation in order to continuously monitor abnormal changes in REE in the RA population, b) to investigate if smoking further enhances hypermetabolism and c) to examine if the new anti-TNFα medication reverses this

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10

Campos, Serrano Juan. "Modèles attractifs en astrophysique et biologie : points critiques et comportement en temps grand des solutions." Phd thesis, Université Paris Dauphine - Paris IX, 2012. http://tel.archives-ouvertes.fr/tel-00861568.

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Dans cette thèse, nous étudions l'ensemble des solutions d'équations aux dérivées partielles résultant de modèles d'astrophysique et de biologie. Nous répondons aux questions de l'existence, mais aussi nous essayons de décrire le comportement de certaines familles de solutions lorsque les paramètres varient. Tout d'abord, nous étudions deux problèmes issus de l'astrophysique, pour lesquels nous montrons l'existence d'ensembles particuliers de solutions dépendant d'un paramètre à l'aide de la méthode de réduction de Lyapunov-Schmidt. Ensuite un argument de perturbation et le théorème du Point x

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11

Mbarek, Saoussen. "Les bulles de masse négative dans un espace de de Sitter." Thèse, 2013. http://hdl.handle.net/1866/10429.

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Nous étudions différentes situations de distribution de la matière d’une bulle de masse négative. En effet, pour les bulles statiques et à symétrie sphérique, nous commençons par l’hypothèse qui dit que cette bulle, étant une solution des équations d’Einstein, est une déformation au niveau d’un champ scalaire. Nous montrons que cette idée est à rejeter et à remplacer par celle qui dit que la bulle est formée d’un fluide parfait. Nous réussissons à démontrer que ceci est la bonne distribution de matière dans une géométrie Schwarzschild-de Sitter, qu’elle satisfait toutes les conditions et que

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12

Alexopoulos, Theodoros. "A measurement of the Bose-Einstein correlation for two pions in proton-antiproton collisions at center of mass energy 1.8 TeV." 1991. http://catalog.hathitrust.org/api/volumes/oclc/24563170.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1991.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 356-361).

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13

Kohley, Zachary Wayne. "Transverse Collective Flow and Emission Order of Mid-Rapidity Fragments in Fermi Energy Heavy Ion Collisions." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8495.

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The Equation of State (EoS) of asymmetric nuclear matter has been explored through the study of mid-rapidity fragment dynamics from the 35 MeV/u $^{70}$Zn $^{70}$Zn, $^{64}$Zn $^{64}$Zn, and $^{64}$Ni $^{64}$Ni systems. The experimental data was collected at the Texas A and M Cyclotron Institute using the 4 NIMROD-ISiS array, which provided both event characterization and excellent isotopic resolution of charged particles. The transverse collective flow was extracted for proton, deuteron, triton, 3He, alpha, and 6He particles. Isotopic and isobaric effects were observed in the transverse flow

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14

(11181858), Yu-Wei Hung. "Simulation and Optimization of Desiccant-Based Wheel integrated HVAC Systems." Thesis, 2021.

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Energy recovery ventilation (ERV) systems are designed to decrease the energy consumed by building HVAC systems. ERV’s scavenge sensible and latent energy from the exhaust air leaving a building or space and recycle this energy content to pre-condition the entering outdoor air. A few studies found in the open literature are dedicated to developing detailed numerical models to predict or simulate the performance of energy recovery wheels and desiccant wheels. However, the models are often computationally intensive, requiring a lot of time to perform parametric studies. For example, if the physi

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15

Bączyk, Paweł. "Naruszenie symetrii izospinowej przez oddziaływanie silne w podejściu opartym na teorii funkcjonału gęstości." Doctoral thesis, 2019. https://depotuw.ceon.pl/handle/item/3510.

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Celem niniejszej pracy było zbadanie naruszenia symetrii izospinowej (ISB) przez efektywne oddziaływanie jądrowe. Przedstawiono w niej wyniki rachunków dotyczących własności, struktury i rozpadów jąder atomowych, które wykonano, wykorzystując formalizm teorii funkcjonału gęstości oraz metody wychodzące poza przybliżenie pola średniego. Punktem wyjścia przy definiowaniu oddziaływania nukleon-nukleon użytego w tej pracy była efektywna, izoskalarna siła Skyrme'a oparta na kontaktowym potencjale typu delta Diraca. Oddziaływanie to wzbogacono o nowe człony o charakterze ISB, posiłkując się przy ty

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