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Dissertations / Theses on the topic 'Complex processes and phenomena'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Hoffmann, Salvaña Xavier Roderic. "Memory-induced complex contagion in spreading phenomena on networks." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/672674.

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Epidemic modeling has proven to be an essential framework for the study of contagion phenomena in biological, social, and technical systems. Albeit epidemic models have evolved into powerful predictive tools, most assume memoryless agents and independent transmission channels. Nevertheless, many real-life examples are manifestly time-sensitive and show strong correlations. Moreover, recent trends in agent-based modeling support a generalized shift from edge-based descriptions toward node-centric approaches. Here I develop an infection mechanism that is endowed with memory of past exposures

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2

Hoppe, Konrad. "Complex networks with node intrinsic fitness : on structural properties and contagious phenomena." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/10345.

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Complex networks is a vibrant research field and has received much attention over the last decade. Central to this area is the question of how networks around us are constructed. The essential notion of network research is that these systems are assembled in a decentralised way, thus no central agent is planning the network beforehand. Despite this lack of central coordination, many networks present intriguing universalities, such as broad degree distributions, in the form of power-laws. The subject of study in this thesis is a class of networks that are constructed by a node intrinsic variabl

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3

Costa, Rui Américo Ferreira da. "Novel critical phenomena in optimization driven processes on networks." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12297.

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Doutoramento em Física<br>The work presented in this Ph.D thesis was developed in the context of complex network theory, from a statistical physics standpoint. We examine two distinct problems in this research field, taking a special interest in their respective critical properties. In both cases, the emergence of criticality is driven by a local optimization dynamics. Firstly, a recently introduced class of percolation problems that attracted a significant amount of attention from the scientific community, and was quickly followed up by an abundance of other works. Percolation transitions wer

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4

Lym, Youngbin. "Three essays on unveiling complex urban phenomena: toward improved understanding." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595283291505878.

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5

Kumar, Vivek [Verfasser]. "Modeling and Numerical Simulations of Complex Transport Phenomena in Crystal Growth Processes : Modellierung und numerische Simulationen komplexer Transportvorgänge in Kristallzüchtungsprozessen / Vivek Kumar." Aachen : Shaker, 2006. http://d-nb.info/1186587040/34.

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6

Modi, Bhavi P. "GENETIC AND EPIGENETIC MECHANISMS OF COMPLEX REPRODUCTIVE DISORDERS." VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4574.

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Common, complex disorders are polygenic and multifactorial traits representing interactions between environmental, genetic and epigenetic risk factors. More often than not, contributions of these risk factors have been studied individually and this is especially true for complex reproductive traits where application of genomic technologies has been challenging and slow to progress. This thesis explores the potential of genetic and epigenetic components contributing to a better understanding of the biological pathways underlying disease risk in two specific female complex reproductive traits -

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7

Heidemann, Ralf. "Dynamical phenomena in complex plasmas." Diss., lmu, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-152519.

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8

Colombini, Giulio. "Synchronisation phenomena in complex neuronal networks." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23904/.

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The phenomenon of neural synchronisation, a simultaneous and repeated firing of clusters of neurons, underlies many physiological functions and pathological manifestations in the brain of humans and animals, ranging from information encoding to epileptic seizures. Neural synchronisation, as a general phenomenon, can be approached theoretically in the framework of Dynamical Systems on Networks. In the present work, we do so by considering complex networks of FitzHugh-Nagumo model neurons. In the first part we consider the most understood models where each neuron treats its presynaptic neurons a

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9

MARCHEGGIANI, LAURA. "Synchronization phenomena in complex dynamical systems." Doctoral thesis, Università Politecnica delle Marche, 2010. http://hdl.handle.net/11566/242227.

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10

Grauwin, Sébastian. "Exploring Social Phenomena with Complex Systems Tools." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2011. http://tel.archives-ouvertes.fr/tel-00662484.

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This thesis explores the problems raised by the aggregation of entities into a global, collective level, an old problem encountered in many fields of science. We work on three projects related to the aggregation problem in social systems, using tools derived from statistical physics, and more generally quantitative tools. The first project focus on a paradigmatic model of the emergence of puzzling macroscopic behavior from simple individual rules, Schelling's segregation model. We hence propose an analytical resolution of this model and we studied analytically and via simulations the effect of

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11

Chen, Da. "The visual analysis of complex natural phenomena." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760925.

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Optical flow estimation or dense motion estimation for dynamic natural phenomena (water, smoke, fire, etc.) is a significant open problem in Computer Vision. Assumptions such as brightness constancy cannot be relied upon, as natural phenomena scenes contain lots of non- rigid motion, blurred motion, etc. Current approaches tend to be either general, giving poor results, or else be specialised in one phenomenon and therefore fail to generalise well. The literature would benefit from a general solution, and such a solution could be found useful in a diverse set of application areas. In this thes

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12

Fox, Emily Beth. "Bayesian nonparametric learning of complex dynamical phenomena." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55111.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 257-270).<br>The complexity of many dynamical phenomena precludes the use of linear models for which exact analytic techniques are available. However, inference on standard nonlinear models quickly becomes intractable. In some cases, Markov switching processes, with switches between a set of simpler models, are employed to describe the observed dynamics. Such models typically rely on pre-specifyin

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13

Brink, Adam Ray. "Modeling Complex Contact Phenomena with Nonlinear Beamshells." University of Akron / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=akron1429395652.

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14

Mukherjee, Prithwiraj. "Modeling complex decision processes." Thesis, Cergy-Pontoise, Ecole supérieure des sciences économiques et commerciales, 2014. http://www.theses.fr/2014ESEC0007.

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Cette thèse contient trois essais traitant de la modélisation des processus de décision complexes dans le marketing. Ces trois essais traitent chacun d'un aspect différent de la prise de décisions complexes, que ce soit au niveau individuel ou au niveau du réseau. Les essais 1 et 2 de cette thèse utilisent des modèles à base d'agents. L’essai 1 est une extension de Goldenberg, Libai, et Muller (2010), qui utilisent un modèle à base d'agents pour démontrer que, contrairement à l'intuition, les produits avec des externalités de réseau ont tendance à se diffuser plus lentement que ceux sans exter

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15

Jefferies, Paul. "Emergent phenomena of complex adaptive systems : financial markets." Thesis, University of Oxford, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427625.

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16

Willshaw, Stephen Kilgour. "On pattern-switching phenomena in complex elastic structures." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/on-patternswitching-phenomena-in-complex-elastic-structures(d013e89e-c413-4612-a1f7-9fc55739cdfb).html.

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We investigate global pattern-switching effects in 2D cellular solids in which the voids are arranged in a square lattice. Uniaxial compression of these structures triggers an elastic instability which brings about a period-doubling transformation of the void shapes at a critical strain. Specifically, a square array of circular voids forms a pattern of mutually orthogonal ellipses and a similar effect is observed for diamond-shaped voids. The onset of instability is governed by the void fraction and size-effects are found for the experimental samples. We establish empirical laws which characte

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17

Mitic, Slobodan. "Physical Processes In Complex Plasma." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-118825.

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18

Blom, Hans. "Purification Processes for Complex Biomacromolecules." Doctoral thesis, Uppsala universitet, Fysikalisk-organisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-172892.

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This thesis details various techniques and considerations for the purification of complex biomacromolecules. Initially an α-mannosidase from babaco fruit was purified using anion exchange-, lectin affinity- and size exclusion chromatography. The enzyme was approximately 260-280 kDa in size with an apparent an unusual octagonal stoichiometry and displayed properties similar to other known plant α-mannosidases. Mucins were fractionated by ion exchange and size exclusion chromatography to assess the properties that govern the mucin surface coating interactions in biomaterial research. Comme

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19

Afzal, Nasrin. "Aging processes in complex systems." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23901.

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Recent years have seen remarkable progress in our understanding of physical aging in nondisordered systems with slow, i.e. glassy-like dynamics. In many systems a single dynamical length L(t), that grows as a power-law of time t or, in much more complicated cases, as a logarithmic function of t, governs the dynamics out of equilibrium. In the aging or dynamical scaling regime, these systems are best characterized by two-times quantities, like dynamical correlation and response functions, that transform in a specific way under a dynamical scale transformation. The resulting dynamical scaling fu

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20

Reyes, Gabriel. "Introspection of complex cognitive processes." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066566/document.

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Au cours de la dernière décennie, un grand effort a été réalisé en sciences cognitives afin de comprendre comment les individus accèdent à leurs propres produits cognitifs. Cette thèse étudie les contenus mentaux qui sont accessibles par l´introspection. Le premier projet étudie la possibilité d´accéder de manière introspective à des processus cognitifs complexes, dans le contexte d´une tâche de recherche visuelle. Le second projet approfondit les résultats du premier projet. Dans cette étude, nous avons mis en place un stimulus préconscient pour altérer le processus de recherche visuelle. Tou

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21

Thomas, Gwyn Thomas. "Studies of archaeological copper corrosion phenomena." Thesis, Cardiff University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388850.

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22

Mielke, Eric. "Study on the Transport Phenomena in Complex Micro-Reactors." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36040.

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Continuous processing in the pharmaceutical and fine chemical industries, particularly in micro/milli-scale reactors, has been a topic of interest in literature in recent years due to the advantages offered over batch reactions. One such advantage is the enhanced transport properties of operating at smaller scales, although the quantification of the transport phenomena is not straightforward when wall and entrance effects cannot be neglected. In the first study presented, various micro-mixer geometries and scales were considered to increase the mixing efficiency in liquid-liquid systems of

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23

Ruiz, Amador Dolly Natalia. "Multilevel aging phenomena analysis in complex ultimate CMOS designs." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT002/document.

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L'auteur n'a pas fourni de résumé en français<br>Integrated circuits evolution is driven by the trend of increasing operating frequencies and downscaling of the device size, while embedding more and more complex functionalities in a single chip. However, the continuation of the device-scaling race generates a number of technology challenges. For instance, the downscaling of transistor channel lengths induce short-channel effects (drain-induced barrier lowering and punch-through phenomena); high electric field in the devices tend to increase Hot electron effect (or Hot Carrier) and Oxide Dielec

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24

Herchig, Ryan Christopher. "Complex Electric-Field Induced Phenomena in Ferroelectric/Antiferroelectric Nanowires." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6710.

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Perovskite ferroelectrics and antiferroelectrics have attracted a lot of attention owing to their potential for device applications including THz sensors, solid state cooling, ultra high density computer memory, and electromechanical actuators to name a few. The discovery of ferroelectricity at the nanoscale provides not only new and exciting possibilities for device miniaturization, but also a way to study the fundamental physics of nanoscale phenomena in these materials. Ferroelectric nanowires show a rich variety of physical characteristics which are advantageous to the design of nanoscale

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25

Su, Yu Chu Joan. "The effect of interfacial phenomena on high temperature processes." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423096.

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26

Dong, Wen S. M. Massachusetts Institute of Technology. "Influence modeling of complex stochastic processes." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/37386.

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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2006.<br>Includes bibliographical references (leaves 75-76).<br>A complex stochastic process involving human behaviors or human group behaviors is computationally hard to model with a hidden Markov process. This is because the state space of such behaviors is often a Cartesian product of a large number of constituent probability spaces, and is exponentially large. A sample for those stochastic processes is normally composed of a large collection of heterogeneous consti

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27

Kennell, Jonathan 1980. "Generative temporal planning with complex processes." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/28414.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2004.<br>Includes bibliographical references (leaves 101-104).<br>Autonomous vehicles are increasingly being used in mission-critical applications, and robust methods are needed for controlling these inherently unreliable and complex systems. This thesis advocates the use of model-based programming, which allows mission designers to program autonomous missions at the level of a coach or wing commander. To support such a system, this thesis presents the Spock generative planne

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28

Arruda, Guilherme Ferraz de. "Modeling spreading processes in complex networks." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-20072018-160836/.

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Mathematical modeling of spreading processes have been largely studied in the literature, and its presented a boom in the past few years. This is a fundamental task on the understanding and prediction of real spreading processes on top of a population and are subject to many structural and dynamical constraints. Aiming at a better understanding of this processes, we focused in two task: the modeling and the analysis of both dynamical and structural aspects of these processes. Initially, we proposed a new and general model that unifies epidemic and rumor spreading. Besides, regarding the analys

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29

Vieira, Emanuel Sousa. "Cascade processes in directed complex networks." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/23482.

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Mestrado em Engenharia Física<br>In this thesis we study analytically and numerically the bootstrap percolation process in random uncorrelated directed complex networks. We formulate and analyze the bootstrap percolation process on both unweighted and weighted networks and also study a probability based percolation process. The considered percolation process has an associated activation threshold k where a node only gets active if it has at least k active neighboring nodes. We compare our results with analytical and numerical results obtained for undirected complex networks. We also an

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30

Perdikis, Dionysios. "Functionnal organization of complex behavioral processes." Thesis, Aix-Marseille 2, 2011. http://www.theses.fr/2011AIX22050/document.

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Selon des études comportementales, les comportements complexes sont des processus multi-échelles, souvent composés de sous-éléments (unités fonctionnelles ou primitives). Cette thèse propose des architectures fonctionnelles afin de représenter la structure dynamique des unités fonctionnelles ainsi que celle des comportements multi-échelles résultants. Dans un premier temps, des unités fonctionnelles sont modélisées comme des flux structurés de faible dimension dans l'espace de phase (modes de fonctionnement). Des dynamiques supplémen-taires (signaux opérationnels) opèrent sur ces modes de fonc

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31

Hou, Xiaofei. "Numerical modeling of complex heat transfer phenomena in cooling applications." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/309294.

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Multiphase and multicomponent flows are frequently encountered in the cooling applications due to combined heat transfer and phase change phenomena. Two-fluid and homogeneous mixture models are chosen to numerically study these flows in the cooling phenomena. Therefore this work is divided in two main parts. In the first part, a two-fluid model algorithm for free surface flows is presented. The two fluid model is usually used as a tool to simulate dispersed flow. With its extension, it may also be applied to large interface (separated) flow. In the second part, the homogeneous mixture model fo

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32

Akbar, Muhammad Khalid. "Transport Phenomena in Complex Two and Three-Phase Flow Systems." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4897.

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Two and three-phase flow processes involving gas, liquid and solid, are common in nature and industry, and include some of the most complex and poorly-understood transport problems. In this research hydrodynamics, heat and mass transfer processes in complex two and three-phase flows were investigated. The interfacial surface area concentration in a short vertical column subject to the through flow of fiber-liquid-gas slurry was experimentally measured using the gas absorption technique. The experimental data were statistically analyzed for parametric effects, and were empirically correlated. T

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33

Heidemann, Ralf [Verfasser], and Gregor [Akademischer Betreuer] Morfill. "Dynamical phenomena in complex plasmas / Ralf Heidemann. Betreuer: Gregor Morfill." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1031380280/34.

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34

Raeisi, Dehkordi Amir Hooshang. "Investigation of flow boiling phenomena in small-scale complex geometries." Thesis, Heriot-Watt University, 2012. http://hdl.handle.net/10399/2531.

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This study concerns measurement and prediction of single-phase and flow boiling heat transfer coefficients and pressure drops in mini multi-channel geometries with and without interconnecting passages, including plate channel; parallel channel; in-line pin-fin and in-line off-set pin-fin surfaces. Experiments were performed with refrigerant R113 and deionised water at atmospheric pressure. Single-phase and flow boiling heat transfer coefficients and pressure drops were obtained over a range of effective heat fluxes and mass fluxes. For the plate and parallel channel surfaces, the results obtai

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Heidemann, Ralf Verfasser], and G. E. [Akademischer Betreuer] [Morfill. "Dynamical phenomena in complex plasmas / Ralf Heidemann. Betreuer: Gregor Morfill." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-152519.

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36

Wagner, Carsten. "Transport phenomena in complex turbulent flows : numerical and experimental methods." kostenfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:30077.

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37

MAMBRETTI, FRANCESCO. "EMERGENT PHENOMENA IN CONDENSED MATTER, SOFT MATTER AND COMPLEX SYSTEMS." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/820780.

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Physical systems composed of a large number of reciprocally interacting constituents provide the natural context for the rise of emergent phenomena. Despite the intrinsic difficulty in providing a mathematical definition of what is meant for ‘emergence’ (see [Baas, in Langton, Alife III, Santa Fe Studies in the Sciences of Complexity, Proc. Volume XVII, Addison-Wesley, (1994)]), the intuitive notion of emergent property is that of a collection of interact- ing objects showing a novel collective behavior, qualitatively different from and not immediately attributable to the behaviors of the indi

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38

Gutierrez, Guillen Gabriela. "Qualitative study of physical phenomena through geometry of complex foliations." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCK012.

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Cette thèse aborde deux sujets en physique mathématique : l'effet de la raquette de tennis et la monodromie hamiltonienne.Grâce à une exploration approfondie de la géométrie sous-jacente, nous fournissons une description mathématique complète de l'effet de la raquette de tennis, un phénomène géométrique observé dans les rotations libres de corps rigides. Nous examinons l'existence, l'origine et la robustesse de cet effet en utilisant la géométrie complexe et la géométrie réelle. Nous détectons également des signatures de contraintes physiques sur les moments d'inertie du corps, dans la structu

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39

Begum, Latifa. "3-D transport phenomena in vertical direct chill casting processes." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121239.

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Maintaining the uniformity of the temperature distribution of the liquid metal before it enters the mold of Direct Chill (DC) casting processes is critical from the standpoint of defect formation. The temperature of the liquid phase depends on the flow pattern of the molten metal which is strongly inter-connected to the design characteristics of the metal distributor and the process parameters used for a particular alloy such as, casting speed, melt superheat, mold water flow rate, etc. If the melt distribution system is improperly designed and can't sufficiently reduce the turbulence of the

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40

Bennett, Fiona. "Electrostatic charge phenomena in powder processes for dry powder inhalers." Thesis, University of Sunderland, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365417.

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Toth, Joseph Robert III. "Study of Plasma and Electrostatic Processes in Environmentally Relevant Phenomena." Case Western Reserve University School of Graduate Studies / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=case1598617630985555.

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Giovannini, Lorenzo. "Urban scale phenomena and boundary layer processes in mountain valleys." Doctoral thesis, Università degli studi di Trento, 2012. https://hdl.handle.net/11572/368710.

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The urban climate of the city of Trento, adopted as a representative case study of urban weather and climate phenomena in a mid-sized city lying in a mountain valley, is investigated using different methods and on different spatial scales. First the intensity of the Urban Heat Island (UHI) is analyzed evaluating the differences between air temperatures measured at an urban automated weather station on a tower, over mean rooftop level, and at five suburban/rural weather stations, located few kilometers around the city boundaries. It is found that the extra-urban weather stations, being affecte

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Giovannini, Lorenzo. "Urban scale phenomena and boundary layer processes in mountain valleys." Doctoral thesis, University of Trento, 2012. http://eprints-phd.biblio.unitn.it/771/1/PhD_Thesis_Lorenzo_Giovannini_def.pdf.

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The urban climate of the city of Trento, adopted as a representative case study of urban weather and climate phenomena in a mid-sized city lying in a mountain valley, is investigated using different methods and on different spatial scales. First the intensity of the Urban Heat Island (UHI) is analyzed evaluating the differences between air temperatures measured at an urban automated weather station on a tower, over mean rooftop level, and at five suburban/rural weather stations, located few kilometers around the city boundaries. It is found that the extra-urban weather stations, being affect

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López, Arévalo Iván. "Redesign Support Framework for Complex Technical Processes." Doctoral thesis, Universitat Politècnica de Catalunya, 2005. http://hdl.handle.net/10803/6646.

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Els processos industrials requereixen avaluacions periòdiques per a verificar la seva correcta operació en termes tècnics i econòmics. Aquestes avaluacions són necessàries a causa de els canvis en els mercats i en la legislació ambiental i de seguretat. Per a satisfer aquestes demandes és necessari investigar les alternatives dels processos que permetin l'ús òptim dels recursos existents amb la mínima inversió econòmica possible. Aquesta tasca es coneix com redisseny, que és un procediment per a determinar possibles canvis en un procés existent per a millorar-lo pel en alguna mètrica, tal com

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45

Glass, David Herbert. "Multiphoton processes in complex atoms and ions." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388088.

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Gupta, Vasudha. "Intelligent Assistant Architecture for Complex Configuration Processes." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243888456.

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Haumann, David Roger. "Using behavioral simulation to animate complex processes /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487598748017362.

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48

Shai, Saray. "Coupled complex networks : structure, adaptation and processes." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/6596.

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In the last 15 years, network science has established itself as a leading scientific tool for the study of complex systems, describing how components in a system interact with one another. Understanding the structure and dynamics of these networks of interactions is the key to understanding the global behaviour of the systems they represent, with a wide range of applications to fundamental societal problems; from designing stable and resilient infrastructures which are critical to our sustainability, to identifying topological patterns in interactome networks that are associated with breast ca

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Mitra, Chiranjit. "Stability of dynamical processes on complex networks." Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19117.

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Die vorliegende Arbeit umfasst die Entwicklung eines Rahmens zur Bewertung der Stabilität von (multistabilen) komplexen (vernetzten) dynamischen Systemen. Als ersten Beitrag schlagen wir die multiple-node basin stability (MNBS) vor, um die Stabilität vernetzter dynamischer Systeme als Reaktion auf nicht-infinitesimale Störungen zu messen, die gleichzeitig mehrere Knoten des Systems beeinflussen. Weiterhin beziehen wir uns auf das Konzept der Resilienz zur Charakterisierung von Multistabilität. Inspiriert vom Konzept der ökologischen Resilienz schlussfolgern wir, dass die Stabilität der verschi

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MIRCHEV, MIROSLAV. "Cooperative processes in complex networks with imperfections." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2535297.

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Abstract:

Examples of cooperative behavior in complex networks with inherent or created imperfections are in the focus of study in this thesis. The complex networks represent real world systems where a number of entities cooperate through their interconnections. All entities and their interactions have some unique characteristics that determine the overall dynamics of the system. Therefore, the main topic of the thesis is the study of some of the effects of the uniqueness of the individual entities on the dynamical behavior of real systems, the effects of the neglecting of some physical aspects during m

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