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Thematische Bibliographien / Large-Scales / Dissertationen

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Dissertationen zum Thema „Large-Scales“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

Zuletzt aktualisiert am 31. Juli 2025

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1

Drinkwater, Michael John. "Quasar clustering on large scales." Thesis, University of Cambridge, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330222.

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2

Frith, William James. "The clustering of galaxies on large scales." Thesis, Durham University, 2005. http://etheses.dur.ac.uk/2390/.

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We investigate the local large-scale structure of the Universe, addressing various possible issues confronting the ACDM paradigm. Primarily, we investigate the clustering statistics of the newly-completed 2 Micron All Sky Survey (2MASS), the largest all sky galaxy survey to date.The 2MASS galaxy number counts over the ͌ 4000 deg(^2) APM survey area are found to be low compared to predictions but are in good agreement with previous optical results. Surprisingly, the number counts over almost the entire sky ([b] >20 ͌ 27000 deg(^2) ) are also deficient compared to our predictions. These results

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3

Carmona, Loaiza Juan Manuel. "AGN fuelling: bridging large and small scales." Doctoral thesis, SISSA, 2015. http://hdl.handle.net/20.500.11767/3887.

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One of the biggest challenges in understanding the fuelling of supermassive black holes in active galactic nuclei (AGN) is not on accounting for the source of fuel, as a galaxy can comfortably supply the required mass budget, but on its actual delivery. While a clear picture has been developed for the large scale (~ kpc) down to the intermediate one (~ 100 pc), and for the smallest scales (~ 0.1 pc) where an accretion disc likely forms, a bridge that has proven difficult to build is that between ~ 100 pc and ~ 0.1 pc. It is feared that gas at these scales might still retain enough angu

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4

Feldman, Richard. "Toward a theory of abundance at large spatial scales." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104707.

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Fundamentally, ecology is the study of the diversity, distribution, and abundance of organisms. Recent advances in technology coupled with expanding research goals have lead to studies of how the first two of these properties vary over large spatial scales. There has been relatively few cases documenting large scale spatial variation in abundance and very little theoretical development explaining such variation. Yet a general pattern exists: a species is abundant in very few places and rare in most places in its range. Current theory suggests that such a pattern of abundance reflects underlyin

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5

Javanmardi, Behnam [Verfasser]. "Cosmological Investigations On Large And Small Scales / Behnam Javanmardi." Bonn : Universitäts- und Landesbibliothek Bonn, 2017. http://d-nb.info/1130704599/34.

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6

Robinson, Mark. "Accessing large length and time scales with density functional theory." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609128.

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7

Pujol, Vallribera Arnau. "Cosmology with galaxy surveys: how galaxies trace mass at large scales." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/385515.

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Els cartografiats galàctics són una eina important per la cosmologia. No obstant això, la majoria de la matèria està en forma de matèria fosca, que no interacciona amb la llum. Per tant, les galàxies que observem des dels nostres telescopis són una petita fracció de la matèria total de l'univers. Per això és necessari entendre la connexió entre galàxies i matèria fosca per tal d'inferir la distribució de tota la matèria de l'univers a partir dels cartografiats galàctics. Les simulacions són una eina important per a predir la formació i evolució de les estructures de matèria fosca i galàxies.

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8

Vanneste, Sylvain. "Constraints on primordial gravitational waves from the large scales CMB data." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS314/document.

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Cette thèse s’articule autour du développement d'outils d’analyse des modes B du fond diffus cosmologique (CMB) dans le but d'estimer l’amplitude des ondes gravitationnelles primordiales produites durant la période inflationnaire.Nous nous intéressons plus précisément aux grandes échelles angulaires, pour lesquelles le signal attendu des modes B primordiaux est dominant. Ces échelles étant particulièrement contaminées par des émissions polarisées galactiques, nous avons étudié et développé des méthodes permettant de réduire ces contaminations et de caractériser les résidus. Ces outils peuvent

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Monroe, Emy M. "Population Genetics and Phylogeography of Two Large-River Freshwater Mussel Species at Large and Small Spatial Scales." Miami University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=miami1218129323.

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10

Mohammed, Abdulwasey. "Scaling up of peatland methane emission hotspots from small to large scales." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15772.

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Methane is an important greenhouse gas that is relatively long-lived in the atmosphere, and wetlands are a major natural source of atmospheric methane. Methane emissions from wetlands are variable across both space and time at scales ranging from meters to continents and a comprehensive accounting of wetland methane efflux is critical for quantifying the atmospheric methane balance. Major uncertainties in quantifying methane efflux arise when measuring and modelling its physical and biological determinants, including water table depth, microtopography, soil temperature, the distribution of aer

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11

Chippendale, Aaron Paul. "Detecting cosmological reionization on large scales through the 21 cm HI line." Thesis, The University of Sydney, 2009. http://hdl.handle.net/2123/6256.

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This thesis presents the development of new techniques for measuring the mean redshifted 21 cm line of neutral hydrogen during reionization. This is called the 21 cm cosmological reionization monopole. Successful observations could identify the nature of the first stars and test theories of galaxy and large-scale structure formation. The goal was to specify, construct and calibrate a portable radio telescope to measure the 21 cm monopole in the frequency range 114 MHz to 228 MHz, which corresponds to the redshift range 11.5 > z > 5.2. The chosen approach combined a frequency independent anten

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Chippendale, Aaron Paul. "Detecting cosmological reionization on large scales through the 21 cm HI line." University of Sydney, 2009. http://hdl.handle.net/2123/6256.

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Doctor of Philosophy (PhD)<br>This thesis presents the development of new techniques for measuring the mean redshifted 21 cm line of neutral hydrogen during reionization. This is called the 21 cm cosmological reionization monopole. Successful observations could identify the nature of the first stars and test theories of galaxy and large-scale structure formation. The goal was to specify, construct and calibrate a portable radio telescope to measure the 21 cm monopole in the frequency range 114 MHz to 228 MHz, which corresponds to the redshift range 11.5 > z > 5.2. The chosen approach combined

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13

Folesky, Jonas [Verfasser]. "Rupture Propagation Imaging Across Scales: from Large Earthquakes to Microseismic Events / Jonas Folesky." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1176635158/34.

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14

Folesky, Jonas T. [Verfasser]. "Rupture Propagation Imaging Across Scales: from Large Earthquakes to Microseismic Events / Jonas Folesky." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1176635158/34.

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15

Sanderson, Philip John 1974. "Experimental verification of the simplified scaling laws for bubbling fluidized beds at large scales." Monash University, Dept. of Chemical Engineering, 2002. http://arrow.monash.edu.au/hdl/1959.1/7891.

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16

Turner, Sara M. "Understanding river herring movement patterns at small and large spatial scales through geochemical markers." Thesis, State University of New York Col. of Environmental Science & Forestry, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3628508.

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<p> Environmentally-derived elemental and isotopic ratios in the otoliths of anadromous river herring (alewife, <i>Alosa pseudoharengus,</i> and blueback herring, <i>A. aestivalis</i>) were used to distinguish among groups of fish at spatial scales ranging from sub-populations within a watershed to populations from throughout the species' ranges. These ratios were also used to understand early life migrations and habitat use within and among populations. Sub-populations within the Hudson River, NY were accurately distinguished (> 95%), and populations from the Hudson River and Long Island, NY

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Chen, Chih-Chieh. "Transient mountain waves in an evolving synoptic-scale flow and their interaction with large scales /." Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/10078.

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18

Gallienne, Christopher Paul. "The development of novel techniques for characterisation of marine zooplankton over very large spatial scales." Thesis, University of Plymouth, 1997. http://hdl.handle.net/10026.1/1727.

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Marine zooplankton play an important role in the transfer of CO2 from the atmosphere/ocean system to deeper waters and the sediments. They also provide food for much of the world's fish stocks and in some areas of the ocean depleted of nutrients they sustain phytoplankton growth by recycling nutrients. They therefore have a profound effect on the carbon cycle and upon life in the oceans. There is a perceived lack of information about global distributions of zooplankton needed to validate ecosystems dynamics models, and the traditional methods of survey are inadequate to provide this informatio

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Scukins, Arturs. "Bridging large and small scales of water models using hybrid Molecular Dynamics/Fluctuating Hydrodynamics framework." Thesis, Aston University, 2014. http://publications.aston.ac.uk/24546/.

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This thesis presents a two-dimensional water model investigation and development of a multiscale method for the modelling of large systems, such as virus in water or peptide immersed in the solvent. We have implemented a two-dimensional ‘Mercedes Benz’ (MB) or BN2D water model using Molecular Dynamics. We have studied its dynamical and structural properties dependence on the model’s parameters. For the first time we derived formulas to calculate thermodynamic properties of the MB model in the microcanonical (NVE) ensemble. We also derived equations of motion in the isothermal–isobaric (NPT) en

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Helmert, Jürgen. "Determination of characteristic turbulence length scales from large-eddy simulation of the convective planetary boundary layer." Doctoral thesis, Universitätsbibliothek Leipzig, 2004. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-37561.

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Turbulente Austauschprozesse in der atmosphärischen Grenzschicht spielen eine Schlüsselrolle beim vertikalen Impuls-, Energie- und Stofftransport in der Erdatmosphäre. In meso- und globalskaligen Atmosphärenmodellen sind turbulente Austauschprozesse jedoch subskalig und müssen unter Verwendung geeigneter Schliessungsansätze parametrisiert werden. Hierbei spielt die Spezifikation der charakteristischen Turbulenzlängenskala in Abhängigkeit vom Stabilitätszustand der Atmosphäre eine entscheidende Rolle. Gegenwärtig verwendete Ansätze, die auf der Verwendung der turbulenten Mischungslänge für neut

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Pond, Jarrad W. T. "Perturbation analysis of fluctuations in the universe on large scales, including decaying solutions and rotational velocities." Honors in the Major Thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1309.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Sciences<br>Physics

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Hoult, Crispin. "The requirements, implementation and use of a generic foundation dataset for large-scales spatial data management." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295514.

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23

Tao, Ze. "Crestal fault reactivation on rising salt diapirs : an integrated analysis from large to small scales of observation." Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/116170/.

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The modes in which faults can propagate and grow through subsurface rocks and strata are key to the establishment of fluid paths in sedimentary basins; faults are potential conduits for fluid in some regions, at the same time they are associated with fault-related traps in others. The classical fault propagation models addressed in the published literature have so-far considered isolated, linkage (lateral-tip linkage and dip-linkage), constant-length, and coherent models. However, the propagation histories of faults in regions dominated by salt tectonics are scarcely documented; rather, the ex

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Smith, Russell Julian. "Streaming motions of Abell clusters : new evidence for a high-amplitude bulk flow on very large scales." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4826/.

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Streaming motions of galaxies and clusters provide the only method for probing the distribution of mass, as opposed to light, on scales of 20 - 100 h(^-1)Mpc. This thesis presents a new survey of the local peculiar velocity field, based upon Fundamental Plane (FP) distances for an all-sky sample of 56 clusters to cz = 12000 km s(^-1). Central velocity dispersions have been determined from new spectroscopic data for 429 galaxies. From new R-band imaging data the FP photometric parameters (effective diameter and effective surface brightness) have been measured for 324 galaxies. The new spectrosc

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Zieser, Britta [Verfasser], and Matthias [Akademischer Betreuer] Bartelmann. "Probing the matter distribution on intermediate and large scales with weak light deflections / Britta Zieser ; Betreuer: Matthias Bartelmann." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180500024/34.

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26

Ayromlou, Mohammadreza [Verfasser], and Guinevere [Akademischer Betreuer] Kauffmann. "Physical processes that determine the clustering of different types of galaxies on large scales / Mohammadreza Ayromlou ; Betreuer: Guinevere Kauffmann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1241963819/34.

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27

Golinkoff, Jordan Seth. "Estimation and modeling of forest attributes across large spatial scales using BiomeBGC, high-resolution imagery, LiDAR data, and inventory data." Thesis, University of Montana, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3568103.

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<p> The accurate estimation of forest attributes at many different spatial scales is a critical problem. Forest landowners may be interested in estimating timber volume, forest biomass, and forest structure to determine their forest's condition and value. Counties and states may be interested to learn about their forests to develop sustainable management plans and policies related to forests, wildlife, and climate change. Countries and consortiums of countries need information about their forests to set global and national targets to deal with issues of climate change and deforestation as well

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Rodgers, Erin V. "Scales of Resilience: Community Stability, Population Dynamics, and Molecular Ecology of Brook Trout in a Riverscape after a Large Flood." Antioch University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=antioch1422195420.

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29

Kröniger, Konstantin [Verfasser], and M. [Akademischer Betreuer] Mauder. "Surface-atmosphere interactions of heterogeneous surfaces on multiple scales by means of large-eddy simulations and analytical approaches / Konstantin Kröniger ; Betreuer: M. Mauder." Karlsruhe : KIT-Bibliothek, 2018. http://d-nb.info/1176022369/34.

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Vercelloni, Julie. "Quantifying the state of populations and effects of disturbances at large spatio-temporal scales: The case of coral populations in the great barrier reef." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/87812/1/Julie_Vercelloni_Thesis.pdf.

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This project was a step forward in applying statistical methods and models to provide new insights for more informed decision-making at large spatial scales. The model has been designed to address complicated effects of ecological processes that govern the state of populations and uncertainties inherent in large spatio-temporal datasets. Specifically, the thesis contributes to better understanding and management of the Great Barrier Reef.

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Savino, Sandro. "A solution to the problem of the cartographic generalization of Italian geographical databases at large-medium scales: approach definition, process design and operators implementation." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421671.

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During many years in which the generalization of cartographic data has been studied many developments have been achieved. As some national mapping agencies in Europe and in the world are beginning to introduce automated processes in their production lines, the original dream of a completely automated system that could perform generalization is getting closer, even though it has not been reached yet. The aim of this dissertation is to investigate whether it is possible to design and implement a working generalization process for the Italian large-medium scale geographical databases. In th

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Graham, Tabitha. "INVESTIGATION OF MEDIA INGREDIENTS AND WATER SOURCES FOR ALGAE CO2 CAPTURE AT DIFFERENT SCALES TO DEMONSTRATE THE CORRELATIONS BETWEEN LAB-SCALE AND LARGE-SCALE GROWTH." UKnowledge, 2013. http://uknowledge.uky.edu/bae_etds/16.

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As energy use increases globally the environmental burdens increase alike. Many accusations have been made that carbon dioxide is a culprit of climate change. The University of Kentucky and Duke Energy Power have partnered to test carbon capture technology in a large scale project. To this end, the objective of this thesis is to investigate potential water media sources and nutrient sources at different volume scales for algae cultivation to help create a more environmentally viable and economically feasible solution. This work will conduct a life cycle assessment of water media sources and th

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Boudehane, Abdelhak. "Structured-joint factor estimation for high-order and large-scale tensors." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG085.

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Les données et les signaux multidimensionnels occupent une place importante dans les applications modernes. La décomposition tensorielle est un outil mathématique puissant permettant de modéliser les données et les signaux multidimensionnels, tout en préservant les relations interdimensionnelles. Le modèle Canonique Polyadique (CP), un modèle de décomposition tensorielle largement utilisé, est unique à des indéterminations d'échelle et de permutation près. Cette propriété facilite l'interprétation physique, ce qui a encouragé l'intégration du modèle CP dans divers contextes. Le défi auquel est

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Bhowmik, Avit Kumar [Verfasser], Ralf B. [Akademischer Betreuer] Schäfer, and Thomas [Gutachter] Horvath. "Human and Ecological Impacts of Freshwater Degradation on Large Scales. Development and Integration of Spatial Models with Ecological Models for Spatial-ecological Analyses / Avit Kumar Bhowmik. Betreuer: Ralf B. Schäfer. Gutachter: Thomas Horvath." Landau : Universität Koblenz-Landau, Campus Landau, 2015. http://d-nb.info/1107775760/34.

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Padié, Sophie. "Réponse des cervidés à la chasse : stratégies d’utilisation de l’espace à multiples échelles et conséquences sur la végétation." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20185.

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La chasse – comme la prédation naturelle - induit des réponses comportementales par les individus chassés qui cherchent ainsi à éviter ou à reduire le risque. Il est en particulier fréquent d'observer un changement dans leur utilisation de l'espace, mais l'articulation et les déterminants des réponses aux différentes échelles spatiales restent mal compris. De même, s'il a été suggéré que ces modifications comportementales pouvaient affecter en cascade la végétation, cela reste à tester. Pour combler ces lacunes, j'ai, (1) étudié, dans un paysage agricole du sud de la France, une population cha

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Lambie-Hanson, Christopher. "Covering Matrices, Squares, Scales, and Stationary Reflection." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/368.

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In this thesis, we present a number of results in set theory, particularly in the areas of forcing, large cardinals, and combinatorial set theory. Chapter 2 concerns covering matrices, combinatorial structures introduced by Viale in his proof that the Singular Cardinals Hypothesis follows from the Proper Forcing Axiom. In the course of this proof and subsequent work with Sharon, Viale isolated two reflection principles, CP and S, which can hold of covering matrices. We investigate covering matrices for which CP and S fail and prove some results about the connections between such covering matri

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Zech, Alraune [Verfasser], Sabine [Akademischer Betreuer] Attinger, and Olaf [Akademischer Betreuer] Kolditz. "Impact of Aqifer Heterogeneity on Subsurface Flow and Salt Transport at Different Scales : from a method determine parameters of heterogeneous permeability at local scale to a large-scale model for the sedimentary basin of Thuringia / Alraune Zech. Gutachter: Sabine Attinger ; Olaf Kolditz." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2014. http://d-nb.info/1048047229/34.

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Bowman, Adam Shoresworth. "The Born-Oppenheimer Approximation for Triatomic Molecules with Large Angular Momentum in Two Dimensions." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/36249.

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We study the Born-Oppenheimer approximation for a symmetric linear triatomic molecule in two space dimensions. We compute energy levels up to errors of order Îµ<sup>5</sup>, uniformly for three bounded vibrational quantum numbers n<sub>1</sub>, n<sub>2</sub>, and n<sub>3</sub>; and nuclear angular momentum quantum numbers â â ¤ kÎµ<sup>-3/4</sup> for k > 0. Here the small parameter Îµ is the fourth root of the ratio of the electron mass to an average nuclear mass.<br>Master of Science

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Carter, Benjamin. "Water-wave propagation through very large floating structures." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/12031.

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Proposed designs for Very Large Floating Structures motivate us to understand water-wave propagation through arrays of hundreds, or possibly thousands, of floating structures. The water-wave problems we study are each formulated under the usual conditions of linear wave theory. We study the frequency-domain problem of water-wave propagation through a periodically arranged array of structures, which are solved using a variety of methods. In the first instance we solve the problem for a periodically arranged infinite array using the method of matched asymptotic expansions for both shallow and de

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Muñoz, Blanc Carlos. "Simulación físico-matemática de las turbulencias en los incendios de edificación. Propuesta de una nueva metodología de análisis relativa a la verificación cualitativa de las turbulencias simuladas." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/145388.

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En la Unión Europea, y más concretamente en España, el análisis prestacional de cualquier edificio frente a la acción del fuego es aún un hecho aislado y poco habitual, a pesar de las ventajas que el mismo comporta. No obstante, incluso en aquellos países donde hace años se estudia el comportamiento estructural en situación accidental de incendio en base a los métodos prestacionales, como es el caso de Estados Unidos, el campo científico de las simulaciones computacionales basadas en la Dinámica de fluidos y en la Termodinámica está aún en lo que podríamos denominar, haciendo un símil con el c

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Papin, Morgane. "Apport de la bioacoustique pour le suivi d’une espèce discrète : le Loup gris (Canis lupus)." Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0258/document.

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Le nombre croissant de travaux réalisés ces dernières années a montré que la bioacoustique est particulièrement intéressante pour le suivi d’espèces discrètes. L’émergence de dispositifs d’enregistrement autonomes, associée à de nouvelles méthodes d’analyse, ont récemment participé à l’accroissement des études dans ce domaine. Au cours des 30 dernières années, le Loup gris (Canis lupus), mammifère carnivore aux mœurs discrètes connu pour ses hurlements de longue portée, a fait l’objet de nombreuses études acoustiques. Ces dernières visaient notamment à améliorer son suivi, qui s’avère complexe

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Wibking, Benjamin Douglas. "Cosmic structure formation on small scales: From non-linear galaxy clustering to the interstellar medium." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1561556033289855.

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Sarpa, Elena. "Velocity and density fields on cosmological scales : modelisation via non-linear reconstruction techniques and application to wide spectroscopic surveys." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0524.

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Un nouvel algorithme de reconstruction entièrement non-linéaire, basé sur le principe de moindre action, extension du Fast Action Minimization method (Nusser & Branchini, 2000), conçu pour applications aux sondages spectroscopiques de galaxies, est présenté. Sa capacité de reconstruire le champ de vitesse à partir du champ de densité observé et testée sur des catalogues de halo de matière noire: les trajectoires de 10^6 halos sont tracées en arrier dans le temps, bien au-delà de l'approximation lagrangienne du premier ordre. Les vittes propres sont modélisées avec succès à la fois dans l'e

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Papin, Morgane. "Apport de la bioacoustique pour le suivi d’une espèce discrète : le Loup gris (Canis lupus)." Electronic Thesis or Diss., Université de Lorraine, 2018. http://www.theses.fr/2018LORR0258.

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Le nombre croissant de travaux réalisés ces dernières années a montré que la bioacoustique est particulièrement intéressante pour le suivi d’espèces discrètes. L’émergence de dispositifs d’enregistrement autonomes, associée à de nouvelles méthodes d’analyse, ont récemment participé à l’accroissement des études dans ce domaine. Au cours des 30 dernières années, le Loup gris (Canis lupus), mammifère carnivore aux mœurs discrètes connu pour ses hurlements de longue portée, a fait l’objet de nombreuses études acoustiques. Ces dernières visaient notamment à améliorer son suivi, qui s’avère complexe

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Clerjaud, Lilian. "Méthode d’hétérodynage pour la caractérisation de propriétés thermophysiques par thermographie infrarouge dans une large gamme spatiale et temporelle." Thesis, Bordeaux 1, 2010. http://www.theses.fr/2010BOR14040/document.

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De nos jours, l’apport de la miniaturisation a permis d’innombrables progrès scientifiques et techniques : de la microélectronique à la microfluidique et dernièrement les nanotechnologies. Autant de domaines où les enjeux économiques de suivi de qualité ou d’optimisation de production peuvent nécessiter une étape de caractérisation des propriétés intrinsèques des constituants. Parmi ces propriétés, les données thermophysiques permettent notamment de définir la capacité à stocker ou diffuser la chaleur (conductivité, effusivité ou conductivité thermique par exemple). Une manière d’estimer ces p

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Oruganti, Surya Kaundinya. "Stochastic models on residual scales in LES of sprays in diesel-like conditions : spray formation, turbulent dispersion and evaporation of droplets." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEC042.

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Dans le cadre de la simulation à grandes échelles (LES), la thèse aborde la simulation des sprays dans les conditions d’un moteur à injection directe. La vitesse de l’injection des sprays dans ces conditions est très élevée. En conséquence, des structures énergétiques intermittentes aux petites échelles turbulentes peuvent se manifester dans l’écoulement produit. C’est pourquoi l’accent est mis sur la simulation stochastique des effets turbulents aux échelles non-résolues par LES dans les conditions d’un moteur à injection directe. L’impact de ces effets sur l’atomisation primaire et secondair

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Seltz, Andréa. "Application of deep learning to turbulent combustion modeling of real jet fuel for the numerical prediction of particulate emissions Direct mapping from LES resolved scales to filtered-flame generated manifolds using convolutional neural networks Solving the population balance equation for non-inertial particles dynamics using probability density function and neural networks: application to a sooting flame." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMIR08.

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Face à l'urgence climatique, l’efficacité énergétique et la réduction des émissions polluantes est devenue une priorité pour l'industrie aéronautique. La précision de la modélisation des phénomènes physicochimiques joue un rôle critique dans qualité de la prédiction des émissions de suie et des gaz à effet de serre par les chambres de combustion. Dans ce contexte, des méthodes d’apprentissage profond sont utilisées pour construire des modélisations avancées des émissions de particules. Une méthode automatisée de réduction et d’optimisation de la cinétique chimique d’un combustible aéronautique

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Meng, Xiangyi. "Understanding classical and quantum information at large scales." Thesis, 2020. https://hdl.handle.net/2144/42063.

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This dissertation contributes to a better understanding of concepts, theories, and applications of classical and quantum information in various large-scale systems. The dissertation is structured in two parts: The first half is concerned with classical systems: First, we study a basic-yet-never-fully-appreciated property of many real-world complex networks---the scale-free (SF) property---which was often considered to be only represented by the degree distribution. We define a new fundamental quantity, however, the degree--degree distance, which can better represent the SF property by sh

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Charney, Noah. "Movin' & groovin' salamanders: Conservation implications of large scales and quirky sex." 2011. https://scholarworks.umass.edu/dissertations/AAI3461997.

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Mole salamanders (Ambystoma) and woodfrogs ( Lithobates sylvaticus) are abundant in New England and depend on ephemeral wetlands for breeding. Their aquatic habitats have been well studied and are protected by several local and regional regulations. State endangered species laws also protect mabled salamanders (A. opacum), Jefferson salamanders (A. jeffersonianum), and blue-spotted salamanders (A. laterale). However, these amphibians spend most of their adult lives in terrestrial habitats that remain poorly protected and elusive to researchers. In chapter 1, I developed a novel technique using

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Charney, Noah D. "Movin' & Groovin' Salamanders: Conservation Implications of Large Scales and Quirky Sex." 2011. https://scholarworks.umass.edu/open_access_dissertations/373.

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Mole salamanders (Ambystoma) and woodfrogs (Lithobates sylvaticus) are abundant in New England and depend on ephemeral wetlands for breeding. Their aquatic habitats have been well studied and are protected by several local and regional regulations. State endangered species laws also protect mabled salamanders (A. opacum), Jefferson salamanders (A. jeffersonianum), and blue-spotted salamanders (A. laterale). However, these amphbibians spend most of their adult lives in terrestrial habitats that remain poorly protected and elusive to researchers. In chapter 1, I developed a novel technique using

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