Дисертації з теми "Active Matter Physics"
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Mahault, Benoît. "Outstanding problems in the statistical physics of active matter." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS250/document.
Повний текст джерелаActive matter, i.e. nonequilibrium systems composed of many particles capable of exploiting the energy present in their environment in order to produce systematic motion, has attracted much attention from the statistical mechanics and soft matter communities in the past decades. Active systems indeed cover a large variety of examples that range from biological to granular. This Ph.D. focusses on the study of minimal models of dry active matter (when the fluid surrounding particles is neglected), such as the Vicsek model: point-like particles moving at constant speed and aligning their velocities with those of their neighbors locally in presence of noise, that defines a nonequilibrium universalilty class for the transition to collective motion. Four current issues have been addressed: The definition of a new universality class of dry active matter with polar alignment and apolar motion, showing a continuous transition to quasilong-range polar order with continuously varying exponents, analogous to the equilibrium XY model, but that does not belong to the Kosterlitz-Thouless universality class. Then, the study of the faithfulness of kinetic theories for simple Vicsek-style models and their comparison with results obtained at the microscopic and hydrodynamic levels. Follows a quantitative assessment of Toner and Tu theory, which has allowed to compute the exponents characterizing fluctuations in the flocking phase of the Vicsek model, from large scale numerical simulations of the microscopic dynamics. Finally, the establishment of a formalism allowing for the derivation of hydrodynamic field theories for dry active matter models in three dimensions, and their study at the linear level
Watson, Garrett (Garrett A. ). "A method for detecting nonequilibrium dynamics in active matter." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120209.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (pages 55-56).
Active force generation is an important class of out-of-equilibrium activity in cells. These forces play a crucial role in vital processes such as tissue folding, cell division and intracellular transport. It is important to determine the extent of such nonequilibrium activity during cellular processes to understand cell function. Here we present a framework for measuring nonequilibrium activity in biological active matter using time reversal asymmetry based on the Kullbeck-Leibler Divergence (KLD), also known as relative entropy. We estimate the KLD from a stationary time series using a k-nearest neighbors estimator, comparing the time-forwards process to the time-reversed process Using time series data of probe particles embedded in the actin cortex, we establish a lower bound for the entropy production of cortical activity. Our results demonstrate a reliable way to measure the breaking of detailed balance in mesoscopic systems.
by Garrett Watson.
S.B.
Peng, Chenhui. "ACTIVE COLLOIDS IN ISOTROPIC AND ANISOTROPIC ELECTROLYTES." Kent State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=kent1480622734084146.
Повний текст джерелаDell'Arciprete, Dario. "Physics of bacterial microcolonies." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/23418.
Повний текст джерелаAhmed, Israr. "Mathematical and computational modelling of soft and active matter." Thesis, University of Central Lancashire, 2016. http://clok.uclan.ac.uk/18641/.
Повний текст джерелаStefferson, Michael W. "Dynamics of Crowded and Active Biological Systems." Thesis, University of Colorado at Boulder, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10823834.
Повний текст джерелаInteractions between particles and their environment can alter the dynamics of biological systems. In crowded media like the cell, interactions with obstacles can introduce anomalous subdiffusion. Active matter systems, e.g. , bacterial swarms, are nonequilibrium fluids where interparticle interactions and activity cause collective motion and dynamical phases. In this thesis, I discuss my advances in the fields of crowded media and active matter. For crowded media, I studied the effects of soft obstacles and bound mobility on tracer diffusion using a lattice Monte Carlo model. I characterized how bound motion can minimize the effects of hindered anomalous diffusion and obstacle percolation, which has implications for protein movement and interactions in cells. I extended the analysis of binding and bound motion to study the effects of transport across biofilters like the nuclear pore complex (NPC). Using a minimal model, I made predictions on the selectivity of the NPC in terms of physical parameters. Finally, I looked at active matter systems. Using dynamical density functional theory, I studied the temporal evolution of a self-propelled needle system. I mapped out a dynamical phase diagram and discuss the connection between a banding instability and microscopic interactions.
Putzig, Elias. "An Exploration of the Phases and Structure Formation in Active Nematic Materials Using an Overdamped Continuum Theory." Thesis, Brandeis University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10620560.
Повний текст джерелаActive nematics are a class of nonequilibrium systems which have received much attention in the form of continuum models in recent years. For the dense, highly ordered case which is of particular interest, these models focus almost exclusively on suspensions of active particles in which the flow of the medium plays a key role in the dynamical equations. Many active nematics, however, reside at an interface or on a surface where friction excludes the effects of long-range flow. In the following pages we shall construct a general model which describes these systems with overdamped dynamical equations. Through numerical and analytical investigation we detail how many of the striking nonequilibrium behaviors of active nematics arise in such systems.
We shall first discuss how the activity in these systems gives rise to an instability in the nematic ordered state. This instability leads to phase-separation in which bands of ordered active nematic are interspersed with bands of the disordered phase. We expose the factors which control the density contrast and the stability of these bands through numerical investigation.
We then turn to the highly ordered phase of active nematic materials, in which striking nonequilibrium behaviors such as the spontaneous formation, self-propulsion, and ordering of charge-half defects occurs. We extend the overdamped model of an active nematic to describe these behaviors by including the advection of the director by the active forces in the dynamical equations. We find a new instability in the ordered state which gives rise to defect formation, as well as an analog of the instability which is seen in models of active nematic suspensions. Through numerical investigations we expose a rich phenomenology in the neighborhood of this new instability. The phenomenology includes a state in which the orientations of motile, transient defects form long-range order. This is the first continuum model to contain such a state, and we compare the behavior seen here with similar states seen in the experiments and simulations of Stephen DeCamp and Gabriel Redner et. al. [1]
Finally, we propose the measurement of defect shape as a mechanism for the comparison between continuum theories of active nematics and the experimental and simulated realiza- tions of these systems. We present a method for making these measurements which allows for averaging and statistical analysis, and use this method to determine how the shapes of defects depend on the parameters of our continuum theory. We then compare these with the shapes of defects which we measure in the experiments and simulations mentioned above in order to place these systems in the parameter space of our model. It is our hope that this mechanism for comparison between models and realizations of active nematics will provide a key to pairing the two more closely.
Kyriakopoulos, Nikos. "Flocking in active matter systems : structure and response to perturbations." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231666.
Повний текст джерелаBalin, Andrew. "Statistical mechanics of colloids and active matter in and out of equilibrium." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:2941a082-82ca-400b-ae6b-7c22e75cc90c.
Повний текст джерелаCohen, Jack Andrew. "Active colloids and polymer translocation." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:e8fd2e5d-f96f-4f75-8be8-fc506155aa0f.
Повний текст джерелаDal, Cengio Sara. "Competition and Response: from Active Matter to Electrolytes under Confinement." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/670864.
Повний текст джерелаLa mayoría de los sistemas en la Naturaleza manifiestan fenómenos de transporte complejos que surgen de la interacción de múltiples escalas de tiempo y longitud, ya sean intrínsecas en la dinámica del sistema o forzadas externamente. Es el caso, por ejemplo, de una colonia de células migratorias cuyos mecanismos competitivos de autopropulsión e interacción permiten la reorganización en diferentes tejidos; o, al "acercar" y mirar el mismo sistema en una escala diferente, es el caso de los canales iónicos ubicados en las membranas de las células mencionadas. Estos canales exhiben típicamente una selectividad de iones extraordinaria y permeabilidad al agua debido a la interacción entre el confinamiento geométrico, las propiedades de la superficie y los conductos externos. Ya sea para investigar las estructuras colectivas del primer sistema, o las propiedades nanofluídicas del último, se basa en los intereses del lector. En cualquier caso, encontrará algo de reflexión en esta tesis.
Farrell, Fred Desmond Casimir. "Modelling collective behaviour and pattern formation in bacterial colonies." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/10452.
Повний текст джерелаGonzalez, Ibon Santiago. "DNA programmed assembly of active matter at the micro and nano scales." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:8cc298ba-d35c-4c58-8893-b1f2c9d6c65c.
Повний текст джерелаPierce, Christopher J. "Hydrodynamics and Collective Behavior of Magnetotactic Bacteria." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574761477220177.
Повний текст джерелаOropeza, Palacio Freddy Enrique. "Electronic structure of TiO2-based photocatalysts active under visible light." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:dec3cf2c-f14b-40b1-b85a-c0c09d04d15b.
Повний текст джерелаChen, Hongshi. "Contribution to Active Probe for SNOM and Nanoscale Light-matter Interaction based on Photopolymerization." Electronic Thesis or Diss., Troyes, 2022. http://www.theses.fr/2022TROY0007.
Повний текст джерелаScanning Near-field Optical Microscope (SNOM) is a technology for high resolution optical imaging. The high spatial frequency information from the near-field is associated to high spatial resolution, allowing one to break the diffraction limit. The used local probe is still a key topical issue that has been addressed for long. The thesis deals with the development of an active near-field probe based on a polymer tip integrated at the extremity of an optical fiber. We polymerized polymer tip on the surface of the fiber end as a scanning optical probe. Shear-force method with micro tuning fork is used for controlling the probe-sample distance. After surface functionalization of the polymer probe, a few nano-emitters have been attached on the probe extremity, to obtain an active probe. Upon excitation, the nano-emitters can act as local light source for the active probe. Besides, while the development of such active hybrid probes turned out to be challenging, the developed strategy of attachment has been used on gold nanocubes on substrate, to create polarization-sensitive hybrid plasmon nano-emitters. We also extended this hybrid nano-emitters to single photon regime. Finally, the active probe was tested on two kinds of samples: silver nanowires and gold nanocubes. By using our new active probe, we obtained near-field information for those nanostructures and broke the diffraction limit
Recht, Daniel. "Energetic Beam Processing of Silicon to Engineer Optoelectronically Active Defects." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10305.
Повний текст джерелаEngineering and Applied Sciences
Theurkauff, Isaac. "Collective Behavior of active colloids." Thesis, Lyon 1, 2013. http://www.theses.fr/2013LYO10251/document.
Повний текст джерелаWe study the collective behavior of an assembly of Janus Colloids. These are 1µm gold colloids with one half coated in platinum. When immersed in a peroxide bath, they self-propel, owing to diffusiophoresis and electrophoresis, moving at velocities of order 5µm/s. The velocity can be tune by adjusting the amount of peroxide in the bath. At the single particle level, the colloids undergo a persistent random walk. When in denser groups, the colloids interact through chemical and steric effects. The combination of these interactions, with the colloids activity, leads to collective effects. A dynamic cluster phase is observed, the formation of motile clusters of colloids, formed of up to 100 colloids. The clusters are in a stationary state, constantly moving, and exchanging colloids, they are also colliding, merging and breaking apart. We developed both the colloids, whose synthesis is described, and a high-throughput acquisition and analysis system. We measure the positions, and reconstruct the trajectories of thousands of colloids for a few minutes. From the trajectories, we extract statistical observables. We show that the sizes of clusters increases linearly as a function of the activity of the colloids. The probability distribution functions of sizes are power laws. As the density increases, a jamming transition is observed. The dense phase heterogeneous dynamics is characterized. We study the transition from the dense phase to a low density assembly with sedimentation experiments. The low density phase behaves as an ideal gas, allowing the definition of an effective temperature. We measure an equation of state for the system, and propose a heuristic collapse
Bock, Florian. "Active learning of interatomic potentials to investigate thermodynamic and elastic properties of Ti0.5Al0.5N at elevated temperature." Thesis, Linköpings universitet, Teoretisk Fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176587.
Повний текст джерелаDuzgun, Ayhan. "THEORETICAL STUDIES OF NONUNIFORM ORIENTATIONAL ORDER IN LIQUID CRYSTALS AND ACTIVE PARTICLES." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1513692638617845.
Повний текст джерелаPeshkov, Anton. "Approche Boltzmann-Ginzburg-Landau pour les modeles simples de la matiere active." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2013. http://tel.archives-ouvertes.fr/tel-00921017.
Повний текст джерелаZakine, Ruben. "Interactions médiées dans la matière molle et tension de surface des fluides actifs." Thesis, Université de Paris (2019-....), 2019. http://www.theses.fr/2019UNIP7080.
Повний текст джерелаThis thesis focuses on two topics ubiquitous in soft matter: first, mediated interactions between nano-to-micrometer sized objects, second, surface tension in out-of-equilibrium systems. The first part of this thesis is devoted to the properties of a system of particles whose interactions are mediated by a fluctuating background. We start with a nonequilibrium study and we show that the combination of mediated interactions and of the nonequilibrium drive leads to complex structures. Our predictions, beyond statistical mechanical methods, rest on extending the methods of nonlinear dynamics in pattern forming systems, to systems with a local conservation law. The second study of this part is dedicated to an equilibrium experimental system of colloidal particles embedded in lyotropic lamellar phases. Relying on a bottom-up approach, we implement the details of the interaction between each colloidal particle and each lamella to come up with an exact description of the effective force emerging between colloids. These analytical results are then used to discriminate between two types of interaction, both being possibly encountered in experiments. The second part of this thesis focuses on the notion of surface tension for interfaces involving active fluids. We will come up with a definition relating macroscopic forces to microscopic ones, either between particles or, when applicable, between particles and a confining medium. When the active fluid is in contact with a solid boundary, the solid-fluid surface tension is, in general, a more complex quantity than its equilibrium counterpart. By this we mean that its value may depend on the geometry or other details of the measuring device. We will also show that a carefully designed probe allows us to access an equation-of-state-abiding surface tension akin to its equilibrium counterpart. Liquid-vapor interfaces can also be encountered in assemblies of self-propelled particles when these undergo a motility-induced phase separation. We show also that the surface tension associated to a liquid-vapor interface possesses a mechanical definition that echoes the equilibrium one
Carrat, Vincent. "Correction dynamique d'un SLM pour une holographie de haute fidélité. Réalisation d'un MOT-2D pour l'application de modes de Laguerre-Gauss." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00820557.
Повний текст джерелаMiño, Gaston. "Diffusion, rhéologie et microrhéologie de suspension de fluides actifs bactériens confinées dans des dispositifs microfluidiques." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://pastel.archives-ouvertes.fr/pastel-00785349.
Повний текст джерелаGirard, Philippe. "Membranes hors d'équilibre : échanges et transport actif." Phd thesis, Université Paris-Diderot - Paris VII, 2004. http://tel.archives-ouvertes.fr/tel-00006588.
Повний текст джерелаD'Alessandro, Joseph. "Collective regulation of the amoeboid motility : the role of short and long-range interactions in vegetative Dictyostelium discoideum." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1039/document.
Повний текст джерелаCell motility is fundamental in many physiological, either normal or pathological, phenomena. Yet, although these most often involve several cells moving at the same time, how the interactions between cells affect both individual and collective dynamics remains a poorly understood question. In this thesis, I used vegetative Dictyostelium discoideum cells as a model to study this collective regulation of the motility. I relied mainly on the thorough analysis of numerous cell trajectories in various situations to (i) characterise a secreted factor used to down-regulate the cells’ motility (biochemical nature, response pathway, secretion and response dynamics) and (ii) quantitatively analyse and model the dynamics of spreading cell colonies of controlled initial shape, size and density. Last, I describe a dynamic aggregation phenomenon that occurs when the cells are seeded at high density in a nutrient-rich medium
Morin, Alexandre. "Colloidal flocks in challenging environments." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEN047/document.
Повний текст джерелаDirected collected motion within herds, swarms and flocks, is a phenomenon that takes place at all scales in living systems. Physicists have rationalized the emergence of such collective behavior. They have described these systems as active materials. These materials are assembled from self-propelled units that spontaneously move in the same direction. By experimentally studying synthetic flocks, this work uncovers some properties of polar active materials in situations that disfavor their self-organization: their dynamics in disordered environments and their response to external perturbations. Colloidal rollers with alignment interactions are confined within microfluidic devices. At high density, they spontaneously form a flock which is characterized by the emergence of orientational long-ranged order. These colloidal flocks are prototypical realizations of polar active matter. We have studied the response of a polar active liquid assembled from colloidal rollers. We have shown that they display a hysteretic response to longitudinal perturbations. We have theoretically accounted for this non-linear behavior. We have used this behavior to realize autonomous microfluidic oscillators. We have also studied the dynamics of colloidal flocks that propagate through heterogeneous environments. Randomly positioned obstacles focalize flocks along favored channels that form a sparse and tortuous network. Increasing disorder leads to the destruction of flocks. We have demonstrated that the suppression of collective motion is a discontinuous transition generic to all polar active materials
Bohec, Pierre. "Étude du comportement hors-équilibre du cortex cellulaire." Phd thesis, Université Paris-Diderot - Paris VII, 2012. http://tel.archives-ouvertes.fr/tel-00870466.
Повний текст джерелаDerue, Lionel. "Stabilisation thermique de la couche photo-active dʼune cellule solaire organique par réticulation". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00933501.
Повний текст джерелаWei, Xiaomin. "Study and improvement of radiation hard monolithic active pixel sensors of charged particle tracking." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00953382.
Повний текст джерелаWouters, Denis. "Recherche de nouveaux bosons légers en astronomie de haute énergie." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01065648.
Повний текст джерелаFischer, Andreas [Verfasser]. "Self-organization of active matter: The role of interactions / Andreas Fischer." Mainz : Universitätsbibliothek der Johannes Gutenberg-Universität Mainz, 2020. http://d-nb.info/1224896599/34.
Повний текст джерелаJames, Martin [Verfasser]. "Turbulence and pattern formation in continuum models for active matter / Martin James." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1225555973/34.
Повний текст джерелаTeeffelen, Sven van [Verfasser]. "Active and passive soft matter: crystal growth, confinement, and swimming / Sven van Teeffelen." Aachen : Shaker, 2009. http://d-nb.info/1162789883/34.
Повний текст джерелаHeuermann, Geertje [Verfasser], and J. [Akademischer Betreuer] Blümer. "Active Shielding for Future Large-Scale Dark Matter Experiments / Geertje Heuermann. Betreuer: J. Blümer." Karlsruhe : KIT-Bibliothek, 2016. http://d-nb.info/1095665391/34.
Повний текст джерелаAlaimo, Francesco [Verfasser], Axel [Gutachter] Voigt, and Igor [Gutachter] Aronson. "Phase Field Crystal Modeling of Active Matter / Francesco Alaimo ; Gutachter: Axel Voigt, Igor Aronson." Dresden : Technische Universität Dresden, 2019. http://d-nb.info/1226900887/34.
Повний текст джерелаDuman, Özer [Verfasser], Gerhard [Gutachter] Gompper, and Stefan [Gutachter] Klumpp. "Collective Behaviour of Polar Active Matter in Two Dimensions / Özer Duman ; Gutachter: Gerhard Gompper, Stefan Klumpp." Köln : Universitäts- und Stadtbibliothek Köln, 2018. http://d-nb.info/1153543400/34.
Повний текст джерелаVandebrouck, Marine. "Première mesure des résonances géantes isoscalaires dans un noyau exotique riche en neutrons : le 68Ni avec la cible active Maya." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00872712.
Повний текст джерелаThüroff, Florian Peter [Verfasser], and Erwin [Akademischer Betreuer] Frey. "Collective motion in active matter : from microscopic models to macroscopic dynamics / Florian Peter Thüroff. Betreuer: Erwin Frey." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2014. http://d-nb.info/1080122400/34.
Повний текст джерелаLozenko, Sergii. "Heavy metal ion sensors based on organic microcavity lasers." Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2011. http://tel.archives-ouvertes.fr/tel-00744846.
Повний текст джерелаNavarro, Argemí Eloy. "Hydrodynamic effects on active colloidal suspensions." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/665006.
Повний текст джерелаEn aquesta tesi ens proposem estudiar els efectes hidrodinàmics en suspensions col·loidals actives. La interacció hidrodinàmica es propaga a través del fluid en el que es desplacen els col·loids degut al flux que ells mateixos creen durant el seu moviment, podent donar lloc a l’emergència de fenòmens col·lectius, com l’autoorganització en estructures més complexes. Les interaccions hidrodinàmiques no són les úniques presents en el sistema, ja que pot haver-hi d’altres forces actuant entre els col·loids, o podem considerar l’efecte d’altres camps com la gravetat. Presentem el nostre estudi per a dos sistemes diferents: col·loids magnètics i partícules Janus. En aplicar un camp magnètic circular, es pot induir una rotació a una partícula que posseeixi un moment magnètic. Degut a l’acoplament del flux amb el creat per altres partícules i les parets del sistema, un rotor pot acabar desplaçant-se. Dos moments magnètics interactuen entre ells mitjançant la força dipolar, que afavoreix el seu alineament i la formació de cadenes de col·loids. Estudiem com el balanç entre interaccions hidrodinàmiques, magnètiques i efectes gravitatoris afecta a la morfologia de les estructures que poden formar els col·loids magnètics. Les partícules Janus tenen dues cares amb propietats químiques diferents, quelcom que dóna lloc a una interacció entre elles que depèn de la seva orientació relativa. Estudiem les estructures que poden aparèixer per a aquestes partícules com a funció de la intensitat, signe i abast d’aquesta interacció, així com de la forma del flux que creen en desplaçar-se. Metodològicament, hem combinat expressions analítiques aproximades per tenir una idea qualitativa dels fenòmens que hom pot esperar amb simulacions per ordinador per poder estudiar els fenòmens col·lectius en sistemes de més partícules.
op, den Kelder Antonia. "Effects of climate change and organic matter content on modelled active layer thickness and the thermal state of permafrost in Adventdalen, Svalbard." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-147526.
Повний текст джерелаDiScipio, Regina. "Light, Matter, Action: Electronic Relaxation Processes in Biomolecular Photosensitizers and in Photovoltaics." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1522958286743542.
Повний текст джерелаHuber, Lorenz Andreas Horst [Verfasser], and Erwin [Akademischer Betreuer] Frey. "Self-organization in multifaceted active matter systems : impact of microscopic diversity on pattern formation, emergent order, and phase transitions / Lorenz Andreas Horst Huber ; Betreuer: Erwin Frey." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1207757721/34.
Повний текст джерелаJenouvrier, Pierre. "Relations entre propriétés spectroscopiques et microstructurales de couches minces de titanates de terres rares élaborées par sol-gel et intégration dans des dispositifs actifs." Phd thesis, Grenoble INPG, 2003. http://tel.archives-ouvertes.fr/tel-00004400.
Повний текст джерелаCAPRINI, LORENZO. "Statistical Mechanics of Self-Propelled Systems." Doctoral thesis, Gran Sasso Science Institute, 2019. http://hdl.handle.net/20.500.12571/9964.
Повний текст джерелаGassin, Pierre-Marie. "Interfaces Liquides/Liquides Actives: Apport de l'Optique Non Linéaire et de la Tensiométrie." Phd thesis, Université Claude Bernard - Lyon I, 2013. http://tel.archives-ouvertes.fr/tel-00852294.
Повний текст джерелаCoquelle, Eric. "Propriétés élastiques et viscoélastiques de matériaux composites adaptatifs." Phd thesis, Université de Nice Sophia-Antipolis, 2004. http://tel.archives-ouvertes.fr/tel-00009415.
Повний текст джерелаmécaniques contrôlées par un champ magnétique. Ils sont composés de particules magnétiques,
structurées en chaînes unidirectionnelles au sein d'une matrice élastomère silicone. Les essais sous
champ ont révélé un fort accroissement des propriétés mécaniques : jusqu'à 35kPa pour un module de
62kPa en traction statique, et en dynamique un gain sur E' de 600kPa à ε=1%, qui atteint même
21MPa à ε=10-5 ! Dans ce dernier cas, la structuration en chaînes va de pair avec une nette
augmentation de l'effet Payne et de la dissipation d'énergie, encore accentuée en présence d'un
champ, même modeste (15kA/m). L'hypothèse avancée est un décollement progressif de l'élastomère
des charges sous l'effet des fortes contraintes locales, entre deux particules (en quasi-contact). Pour
faciliter l'étude, un traitement de surface à base de molécules couplantes, fonctionnelles, a été mis au
point. La modélisation a d'abord été effectuée sur un système macroscopique (où tous les paramètres
sont contrôlés), et validée par des simulations par éléments finis (FEM). Une méthode de milieu
effectif prédit le comportement du composites aux charges greffées (avant décollement), tandis qu'une
approche semi-analytique, utilisant un critère de décollement de Griffith, calcule le comportement
viscoélastique du composite MR. La complexité de la microstructure et son évolution ont été évaluées,
sous champ, par des cycles quasi-statiques (aboutissant à des σ de -40kPa à ε=0) et des mesures de
magnétostriction. D'autres propriétés originales peuvent être obtenues : piézorésistivité, bandes
périodiques (guides magnétiques).
Richier, Mathieu. "Conception de dispositifs actifs de maintien de stabilité pour les véhicules évoluant en milieux naturels." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2013. http://tel.archives-ouvertes.fr/tel-01066614.
Повний текст джерелаDiallo, Garcia Sarah. "Les Hydroxyapatites, un système basique atypique modulable par la synthèse : vers l'identification des sites actifs." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00828591.
Повний текст джерела