Teses / dissertações sobre o tema "Phénomène physique"
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Ordonevic, Christophe. "Diffusion d'ondes électromagnétiques par des structures complexes. Phénomène de localisation". Aix-Marseille 1, 1998. http://www.theses.fr/1999AIX11087.
Texto completo da fonteIribarne, Christophe d'. "Etude du phénomène de percolation à l'aide de l'arbre à portée minimale". Aix-Marseille 3, 1997. http://www.theses.fr/1997AIX30058.
Texto completo da fontePichon, Joseph. "Enregistrement optique haute densité : étude physique et physico-chimique du phénomène de Super-Résolution". Phd thesis, Grenoble INPG, 2008. http://tel.archives-ouvertes.fr/tel-00363302.
Texto completo da fontePichon, Joseph. "Enregistrement optique haute densité : étude physique et physico-chimique du phénomène de Super-Résolution". Phd thesis, Grenoble INPG, 2008. http://www.theses.fr/2008INPG0139.
Texto completo da fonteThis work has been realized in the field of high density optical data storage. More precisely, this thesis deals with a technology that makes possible a substantial increase in the capacity of optical disks, owing to Super-Resolution techniques. These disks, comprised of marks theoretically too small to be detected, can nevertheless be read out if the optical properties of the disk vary locally under the influence of a high-power laser beam. In this thesis, we have demonstrated this phenomenon by inserting an active thin-films stack into the disks. In particular, we have shown that use of a thin InSb film creates an increase in the areal data density of Blu-Ray disks by a factor of two, consequently enlarging the disks' capacity to 46 GB. We have also shown, by way of optical static characterization of the active stacks, that the reflectance of InSb increases in a reversible and reproductible way under high-fluence laser excitation. Additionally,we have evaluated the importance of thermal effects in the physical mechanisms associatedwith the nonlinear phenomenon. Lastly, we have built a thermooptical simulation of the transient evolution of the thin films stack reflectance, based on the evolution of InSb optical properties with temperature
Robles, Alfredo. "La vidéo comme support didactique en physique : interprétation microscopique d'un phénomène macroscopique : la propagation du son". Lyon 1, 1997. http://www.theses.fr/1997LYO10178.
Texto completo da fonteZbiri, Karim. "Interprétation du phénomène de la multifragmentation autour de 100 MeV / nucléon". Nantes, 2004. http://www.theses.fr/2004NANT2031.
Texto completo da fonteThe nuclear multifragmentation is a complex process observed in nucleus-nucleus and proton-nucleus collisions, during which one attends the production of fragments with various masses. This phenomenon was connected for a long time to a phase transition of nuclear matter of the type liquid-gas, its study is important to understand the atomic nucleus behaviour. In this way many experiments was carried out with the 4p detector INDRA in the research centre GSI at Darmstadt in Germany. The goal of my thesis is to compare the data obtained with existing models, so that initially to validate these models and then in the second time understand and extract the mechanisms behind the multifragmentation of nuclei
Celzard, Alain. "Contribution à l'étude du phénomène de percolation dans des matériaux composites à propriétés anisotropes". Nancy 1, 1995. http://docnum.univ-lorraine.fr/public/SCD_T_1995_0121_CELZARD.pdf.
Texto completo da fonteAbboud, Rizkallah. "Difficultés de l'enseignement dans deux domaines de la physique : le phénomène d'induction électromagnétique et la propagation d'ondes mécaniques". Paris 7, 1989. http://www.theses.fr/1989PA077128.
Texto completo da fonteCarcaud, Pierre. "Étude de quelques modèles cinétiques décrivant le phénomène d'évaporation en gravitation". Phd thesis, Université Rennes 1, 2014. http://tel.archives-ouvertes.fr/tel-01018326.
Texto completo da fontePoulain, Magali. "Désaturation induite par l'exercice chez le patient présentant une bronchopneumopathie chronique obstructive : phénomène et effet de l'addition en oxygène". Montpellier 1, 2002. http://www.theses.fr/2002MON14008.
Texto completo da fonteSamet, Mounir. "Contribution à l'étude de l'état métastable dans les dispositifs logiques bistables : synthèse bibliographique. Modélisation et simulation du phénomène en technologie MOS". Bordeaux 1, 1985. http://www.theses.fr/1985BOR10546.
Texto completo da fonteCharvet, Michael. "Recherche de l'apparition du phénomène de multifragmentation dans le système 32S+27Al". Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10065.
Texto completo da fonteGolfin, Guilhem. "L’objectivité et le phénomène : une étude philosophique et historique du concept de causalité à la lumière de la physique relativiste et quantique". Paris, EHESS, 2014. http://www.theses.fr/2014EHES0155.
Texto completo da fonteThe causality became a central subject during the controversies that arose in the first three decades of the XXth century with the invention of new physical theories, the Theory of relativity and the Quantum Mechanics. This was the case because these new theories questioned the classical causality's form, and even the relevancy of causality in itself for a physical theory, when the traditional idea was that the intelligibility of nature requires absolutely such a relation. Physicists indeed thought that classical causality clarified a matter which was remained confuse within the philosophical doctrines. Hence, the radical changes brought up by the new physical theories lead to analyse scientific intelligibility, and in the same rime the nature and the signification of causality as it is understood by the physicists. The study of some of the great physicists' works, shows that physical causality is an ideal relation, the function of which is to founder the objectivity of the scientific discourse. By the way, it is impossible to consider it as a property of the world, but it must be taken for a hermeneutic category. It works inside a discourse which tries to give a form to phenomena, and which finds its meaning by denying ail nature's proper order
Mallat, Bachar. "Etude du phénomène d’aération sur les carènes des navires océanographiques". Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10109/document.
Texto completo da fonteThe oceanographic research ships of Ifremer use acoustic equipments "SONAR" to study marine resources and to characterize seabeds. Under certain environmental conditions, air entrainment is generated below the free surface due to the interaction between waves and hull and/or the interaction of the ship motions with the free surface. Air bubbles are formed and driven by the flow under the ship hull, which hinders the performance of the acoustic equipment and limits the exploitable sea conditions for acoustic prospecting. The objective of this work is to characterize the phenomenon of bubble generation around different bow models in a wave and current circulating tank. First, this PhD thesis allowed us to study the influence of the bow geometry on the phenomenon. The occurrence frequency and the dynamic of bubble clouds were analyzed in 2D around three bow models for different tested configurations. In the second stage, a detailed study of the phenomenon was carried out and allowed a 3D characterization of the bubble clouds generated and propagated around the hull. An optical probe was used to measure diameters, velocities and void fraction of bubbles generated by breaking bow waves. Finally, PIV2D2C and Stereo-PIV measurements around the different bow models allowed to correlate the hydrodynamic flow field with bubble generation. The obtained results allow to identify the zones where the interaction between the flow and the bow is pronounced and then the position of the bubbles generated and propagated. These results provide an interesting database for ship hull designers and could be used for the validation of future numerical models
Coste-Delclaux, Mireille. "Modélisation du phénomène d'autoprotection dans le code de transport multigroupe APOLLO2". Paris, CNAM, 2006. http://www.theses.fr/2006CNAM0516.
Texto completo da fonteThis document describes the improvements carried out for modelling the shelf-shielding phenomenon in the multigroup transport code APOLLO2. They concern the space and energy treatment of the slowing-down equation, the setting-up of quadrature formulas to calculate reaction rates, the setting-up of a method that treats directly a resonant mixture and the development of a "sub-group" method. We validate these improvements either in an elementary or in a global way. Now, we obtain, more accurate multigroup reaction rates and we are able to carry out a reference self-shielding calculation on a very fine multigroup mesh. To end, we draw a conclusion and give some prospects on the remaining work
Ettouhami, Abdel Mouneim. "Contribution à l'étude des supraconducteurs lamellaires : phénomène d'ancrage et effets de proximité". Université Joseph Fourier (Grenoble), 1994. http://www.theses.fr/1994GRE10059.
Texto completo da fonteSchmit, Cyril. "Le phénomène de fatigue en conditions extrêmes : le « flush model » à l'épreuve des Jeux olympiques". Thesis, Sorbonne Paris Cité, 2016. http://www.theses.fr/2016USPCB095/document.
Texto completo da fonteExplanatory models of endurance performance-based physical exhaustion recently moved from peripheral implications to highlight the role of the central nervous system in the phenomenon of fatigue development. In particular, the “Flush Model” (Millet, 2011) underpins a consensus in that it introduces the rate of perceived exertion as the main regulator of performance. Briefly, this sensation would emerge from the whole psychophysiological interactions inherent to exercising and would be modulable to delay exhaustion. Within this thesis and in the perspective of the Olympic Games in Rio, we focused on the practical dimension of this model at the service of athletes’ performance. Accordingly, functional aspects of the Flush Model were revisited both in regards of training and competition constraints (i.e., the possibility of an important thermal stress). More precisely, the development of the fatigue phenomenon has been challenged to training load and heat strain issues through a chronological approach of the competition, acute and chronic. An acute perspective of the competition relates to all punctual strategies that the athlete can use to modulate his/her perceived exertion and optimize the ratio “perceived strain / exercise intensity” during the event. Specific to endurance effort and to the potential hot climate of Olympic Games, five works have been driven. Two of them investigated the effects on endurance performance of short-term strategies i.e., heat-familiarization, and the wearing of an ice vest during the warm-up phase. Results indicate changes in pacing strategies that possibly result from psychophysiological adaptations specific to the intervention. In complement, three other works have analyzed the cognitive response to acute exercise, both in temperate and hot conditions, to better understand the evolution of behavioral self-regulatory parameters (i.e., executive functions) during endurance performance. The cognitive dynamics that have been identified suggest the use of punctual strategies that could protect athlete’s efficacy during exercise. A chronic perspective of the competition reflects medium-term interventions used by athlete during the precompetitive phase and aiming at maximizing his/her performance level the day of the event. Three studies have been conducted in this direction. Two of them have investigated training load and heat-acclimation issues to determine performance effects and psychophysiological correlates of heat camps. Results demonstrate the requirement of an accurate adjustment of training load in the heat in order to optimize athlete’s performance while preserving from overreaching development. A complementary work aimed, using functional magnetic resonance imaging, at identifying neural underpinnings of the overreaching state that athletes could meet during the precompetitive period. Results display a reduced activation of a specific part of the prefrontal cortex during the completion of cognitive tasks, associated to increased choice impulsivity. Together, these studies attempt to apprehend the fatigue phenomenon from a complex perspective i.e., combining acute and chronic, and physiological and central components of fatigue during exercise. On the basis of a better understanding of this phenomenon, and of the functional dimension of the Flush Model, practical strategies can then be recommended for athletes to optimize both their physical condition during pre-competition and their level of efficacy in situ of the competition
Ramaz, François. "Etude et caractérisation optique de cristaux inorganiques présentant le phénomène de formation de trous spectraux (Spectral Holeburning)". Grenoble 1, 1991. http://www.theses.fr/1991GRE10109.
Texto completo da fonteChatelain, Christophe. "Étude de l'influence du désordre sur les propriétés critiques du modèle de Potts". Nancy 1, 2000. http://www.theses.fr/2000NAN10064.
Texto completo da fonteFalese, Mario. "Etude du phénomène de bifurcation des écoulements vrillés par la Simulation aux Grandes Échelles et l'adaptation de maillage". Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2013. http://tel.archives-ouvertes.fr/tel-00920462.
Texto completo da fonteThomas, Jean-Charles. "Spectroscopie des noyaux légers déficients en neutrons : Étude des noyaux ²¹Mg, ²⁵Si et ²⁶P, approche systématique du phénomène de l'asymétrie miroir, conception d'un détecteur à gaz pour l'étude de la radioactivité 2 protons". Bordeaux 1, 2002. http://www.theses.fr/2002BOR12555.
Texto completo da fonteBerger, Quentin. "Polymères en milieu aléatoire : influence d'un désordre corrélé sur le phénomène de localisation". Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2012. http://tel.archives-ouvertes.fr/tel-00726494.
Texto completo da fonteCanva, Michael. "Étude des propriétés optiques de molécules organiques encagées dans des matrices solides synthétisées par procede sol-gel. Applications : lasers accordables, mémoire optique". Phd thesis, Université Paris Sud - Paris XI, 1992. http://pastel.archives-ouvertes.fr/pastel-00713718.
Texto completo da fonteManteaux, Pierre-Luc. "Simulation et contrôle de phénomènes physiques". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAM062/document.
Texto completo da fonteIn computer graphics, the physical phenomena simulated for the creation of animations, video games or the design of objects are found to be more and more complex:First, in terms of the computational cost, the scale of the simulations is more and more important;Then, in terms of the complexity of the phenomena themselves, which require the models to be able to change their state and shape.This growing complexity introduces new challenges in order to offer control on these large scale simulations to the user.In many cases, this control is reduced to a trial-and-error process in order to determine the parameters of the simulation which best meet the objectives of the user.In this thesis, we propose three techniques to tackle these challenges.First, we introduce a new adaptive model which allows to reduce the computational cost in Lagrangian simulations of particles.In contrast with re-sampling strategies, the number of degrees of freedom remains constant throughout the simulation.Therefore, the method is simpler to integrate into an existing simulator and the memory consumption remains constant, which can be an advantage in an interactive context.Then, we propose an algorithm which allows the detailed cutting of thin deformable objects.Our method relies on a dynamic update of the shape functions associated to the degrees of freedom, which therefore allows to keep a very low number of degrees of freedom while performing detailed topological changes.Finally, we focus on the control of the fluid animations and take inspiration from interactive methods of shape editing in the field of 3D modeling.We introduce a system where the user directly edits the result of the simulation, i.e. a sequence of meshes representing the surface of the fluid.We propose selection and editing spatio-temporal tools inspired from static shapes sculpting software
Trausch, Grégory. "Développement et mise en oeuvre d'une nouvelle méthode fondée sur le phénomène de nutation pour la décomposition d'un signal composite de Résonance Magnétique Nucléaire : application au signal 1H de l'eau dans des argiles synthétiques". Nancy 1, 2006. http://docnum.univ-lorraine.fr/public/SCD_T_2006_0150_TRAUSCH.pdf.
Texto completo da fonteNowadays, geologic nuclear waste storage is envisionned according to a multi-layer model which implies clays. The latter exhibit retention capacities and low permeability to water ; that is why they are considered as a good candidate for engineered barriers to radioactive waste disposal. The present work here aims at studying transport phenomena which involve water molecules in three samples of synthetic clays (two of them exhibiting a « Pake doublet ») by means of Nuclear Magnetic Resonance (NMR). The first chapter describes structural proporties of clays and presents the state-of-art of NMR and other experimental techniques used for such systems. The second chapter deals with the interpretation and the simulation of each conventionnal proton spectrum. These simulations allow us to evidence and to characterize a chemical exchange phenomenon. The third chapter is dedicated to original nutation experiments performed under low radiofrequency field in the case of broad NMR signal. It is shown that this type of NMR experiment can yield the number and the proportion of each species contributing to the whole signal. These results are exploited in the fourth chapter for processing relaxation and diffusion experiments. Finally, the diffusion coefficients obtained by NMR are divided by a factor 4 with respect to pure water while relaxation rates are two orders of magnitude greater
Jeune, Meniol. "Politique publique en matière d’éducation en Haïti et phénomènes de violence en milieu scolaire". Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST0040/document.
Texto completo da fonteWe selected maximum responses are, in view of the results, the major determinants of these phenomena: the use of verbal abuse, the use of psychological violence and even physical violence.The results of this research highlight the implications to educational level, taking into account the representations of students and teachers. They shall also highlight a hotspot for the school to ensure the necessary discipline in community life while respecting the democratic principles that enshrine the rights and freedoms of everyone.The interpretation of what students and teachers who participated in this research allows to draft responses that take into account their expectations and meet both the requirements of a rigorous educational and democratic principles of law school.As to public policy in education, the Haitian state is very low, it was not the right people to their right place. So doing, the situation remains untouchable. To remedy this, the state must implement an education policy that aims to give education its true meaning and its true value is to say form be to become citizens of tomorrow and not violent
Yaacoub, Rouba. "Résonance optique par effet tunnel en optique atmosphérique : application aux observations par satellite des gouttelettes de nuages". Thesis, Lille 1, 2020. http://www.theses.fr/2020LIL1R001.
Texto completo da fonteThe light interaction with a homogeneous dielectric spherical scatterer (e.g. cloud droplet) of known characteristics (diameter, optical index) is treated, in atmospheric optics, by the Mie's theory. This theory serves, also, in remote sensing to retrieve physical properties of scatterers (inverse problem). Recent studies have showed the importance of tunneling effects in atmospheric optics. They have attribute the implication of tunneling effects in the atmospheric glory which is the circular iridescence that form around the projected shadow of an object on a cloud of water droplets. Precisely, light can penetrate by tunneling into a droplet and produces sharp resonances. According to these studies, the Mie's theory , as used in atmospheric optic, seems to neglect such effects. We have called these resonances by the acronym TOR (Tunneling Optical Resonance). In this thesis, we show that TOR can be solved using a one-dimensional Schrödinger equation with an effective potential energy that characterizes the light-droplet interaction and that depends on the refractive index, diameter of the droplet and the incident light's energy. The first main purpose of this thesis is to identify the concept of tunneling and the necessity to introduce it in the Mie's theory. In order to reach this goal, a new method (called transfer matrix method -- TMM) is developed that takes into account the TOR, and allows the identification of the conditions for which TOR occur. The second main purpose, is to compare this method to the Mie's theory and illustrates the differences between them. Our findings show the similarity of the two methods in the case of non-TOR occurrences and disagreement otherwise. This study is performed upon two different cases: (1) a single droplet with a specific diameter and incident energy; (2) a cloud droplet population with a range of diameters from 5 microns to 30 micron for the incident energies of the nine channels (from IR to UV) of the POLDER sensor. For both (1) and (2), cross sections (scattering, extinction and absorption) and the angular distributions of ²the scattered intensity are compared when taking into account the TOR and without considering them. The results are promising and presents a new aspect for addressing light-droplet interaction in atmospheric optics that may affect the inversion problem treatments in remote sensing
Barré, Chloé. "Physique statistique des phénomènes de blocage dans les flux particulaires". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066227/document.
Texto completo da fonteThis manuscript presents a study of blocking phenomenon in particulate streams flowing through anarrow channel. In particular, it examines situations in which blocking is controlled by the limitedcarrying capacity of the channel. It builds on a simple stochastic model, introduced by Gabrielli etal. (Phys. Rev. Lett. 110, 170601, 2013), in which particles arrive randomly according to a Poissondistribution at the entrance of a one-dimensional channel with an intensity λ and, unless interrupted,exit after a transit time, τ. Blocking occurs instantaneously when N=2 particles are simultaneouslypresent in the channel. The quantities of interest include the probability that the channel is still openat time t (survival probability) and the flux and total number of exiting particles. The thesisexamines a number of generalizations including when more than two particles must be present toinduce blockage, N>2, a time dependent intensity, a finite blocking time, and multi-channelsystems. We obtain exact and approximate analytical results using tools such as the masterequations describing the evolution of the n-particle partial probabilities, large deviation theory andqueuing theory. The theoretical results are validated by comparison with the results of numericalsimulations. The final chapter of the thesis uses a different approach, namely a brownian dynamics simulation of a two dimensional system of soft particles subjected to an external driving and dragforces. The presence of an obstacle in the middle of the channel can cause irreversible orintermittent clogging depending on the system geometry, temperature and particle stiffness
Nzikou, Jean-Mathurin. "Étude des phénomènes de diffusion des solutés ioniques par techniques voltamétrique et conductimétrique". Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL145N.
Texto completo da fonteLacoin, Hubert. "Désordre et phénomènes de localisation". Paris 7, 2009. http://www.theses.fr/2009PA077137.
Texto completo da fonteThis thesis studies models of random directed polymers. We focus on the influence of disorder on localization of the trajectories for pinning model and directed polymers in random environment. In addition to the classical Zd models, we pay a particular attention to so-called hierarchical models, built on a sequence of self-similar lattices, that are frequently studied in the physics literature. The results we obtain concern mainly free energy and superdiffusivity properties. In particular we present the proof that: (1) disorder is relevant at arbitrary high temperature for pinning models in dimension 1+1, (2) very strong disorder holds at all temperature in dimension 1+2 for directed polymers in random environment
Dall'Asta, Luca. "Phénomènes dynamiques sur des réseaux complexes". Paris 11, 2006. http://www.theses.fr/2006PA112079.
Texto completo da fonteGascoin, Nicolas. "Etude multi-physique des phénomènes réactifs dans les technologies propulsives aérospatiales". Habilitation à diriger des recherches, Université d'Orléans, 2012. http://tel.archives-ouvertes.fr/tel-00705540.
Texto completo da fonteGuilbaud, Claire. "Modélisation et visualisation de phénomènes naturels simulés par système physique particulaire". Grenoble INPG, 2002. http://www.theses.fr/2002INPG0077.
Texto completo da fonteBernard, Cindy. "Caractérisation des phénomènes physiques par analyse parcimonieuse des signaux transitoires". Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT090/document.
Texto completo da fonteFor their uniqueness, transient are really difficult to characterize. They are met everywhere and are generally the result of very complex physical phenomena that contain a lot of information such as the transient at its origin, the effect of the propagation through the medium and the effects induced by the transducers. They can correspond to communication between mammals as well as being the reflection of a fault in electrical or hydraulic networks for instance. Hence their study is of great importance even though it is quite complicated. Numerous signal processing methods have been developed in the last decades: they often rely on statistical approaches, linear projections of the signal onto dictionaries and data-driven techniques. All those methods have pros and cons since they often provide good detections, nevertheless their characterization for classification and discrimination purposes remains complicated. In this spirit, this thesis proposes new approaches to study transients. After a brief overview of the existing methods, this work first focuses on the representation of signals having tight-varying time-frequency components. Generally, general complex-time distributions present a proper framework to study them but remain limited to narrow band signals. In a first part, we propose to overcome this limitation in the case of signals with a spread time-frequency variation. This method is based on the compression of the signal's spectrum to a bandwidth that ensures the efficiency of the technique. A second part then focuses on the extraction of nonlinear modulation phase signals in the context of nonstationary noise and other coherent signals. This is performed with warping operators and compressive sensing reconstruction techniques. The third chapter then focuses on data-driven methods based on the representation of the signal in phase space. The main contribution takes advantage of the lag diversity that enables to highlight time scale transformations as well as amplitude modifications between transients. Hence, we develop different techniques enabling to highlight those properties. Finally, works presented in the first chapters are developed in applicative contexts such as: ECG segmentation, electrical transient characterization, a passive acoustic configuration and the study of acoustic signals in an immerse environment. We then end up by some conclusions and perspectives for future works
Choblet, Samuel. "Étude des phénomènes physiques dans les matériaux amplificateurs dopés erbium". Lyon 1, 2004. http://www.theses.fr/2004LYO10176.
Texto completo da fonteRossignol, Jérôme. "Théorie et simulation des phénomènes physiques du pied d'arc cathodique". Clermont-Ferrand 2, 2001. http://www.theses.fr/2001CLF21288.
Texto completo da fonteNoël, Olivier. "Phénomènes d'adhésion à une échelle locale : une approche par AFM". Mulhouse, 2003. http://www.theses.fr/2003MULH0743.
Texto completo da fonteThe alm of this wor is to extract quantitative and fondamental data, such as thermodynamie work of adhésion and polymer mechanical properties at the nanoscale, in order to understand fondamental mechanisms in the field of polymer adhésion. To reach this goal, Atomic Force Microscopy appears to be a powerful technique as it measures low interactions (nanonewton). The first part of the project has been dedicated to the calibration and expérimental procédure we used, to access quantitative results. In the second part, we succeed in decoupling the mechanical and chemical contributions on the basis of original nanoindentation and forcedistance expérimenta done on chemically and mechanically controlled model substrates. The results show that the adhésion force is proportional to the therrnodynamic work of adhésion (Wa) and a function, which is a feature of the mechanical dissipation contribution
Giami, Sarah. "Mécanismes d'adhésion d'élastomères phénomènes de migration d'espèces réactivés". Mulhouse, 1998. http://www.theses.fr/1998MULH0523.
Texto completo da fonteMerlen, Alain. "Similitude physique et modélisation par explosion équivalente des phénomènes aérodynamiques de balistique intermédiaire". Lille 1, 1988. http://www.theses.fr/1988LIL10046.
Texto completo da fonteBernon, Jean-Luc. "Correction des phénomènes physiques en tomoscintigraphie cérébrale et recalage multimodal tridimensionnel". Montpellier 2, 2000. http://www.theses.fr/2000MON20031.
Texto completo da fonteAngelo, Yves d'. "Analyse et simulation numérique de phénomènes liés à la combustion supersonique". Marne-la-vallée, ENPC, 1994. http://www.theses.fr/1994ENPC9425.
Texto completo da fonteVet, Stefan. "Dynamical analysis of nutrient-explicit models for small microbial communties". Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/308887.
Texto completo da fonteDoctorat en Sciences
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De, Loubens Clément. "Compréhension et modélisation des phénomènes physiques régissant la libération des stimuli orosensoriels". Phd thesis, AgroParisTech, 2010. http://pastel.archives-ouvertes.fr/pastel-00560501.
Texto completo da fonteAndrieu-Renaud, Céline. "Fiabilité mécanique des structures soumises à des phénomènes physiques dépendant du temps". Clermont-Ferrand 2, 2002. http://www.theses.fr/2002CLF21395.
Texto completo da fonteLoubens, Clément de. "Compréhension et modélisation des phénomènes physiques régissant la libération des stimuli orosensoriels". AgroParisTech, 2010. http://pastel.archives-ouvertes.fr/docs/00/56/05/01/PDF/these_loubens_vf.pdf.
Texto completo da fonteUnderstanding and modeling phenomena governing stimuli release during food consumption make it possible to respect both nutritional and sensorial criteria during its formulation. A model of salt release during the course of mastication was developed for “solid” products. The breakdown was comprehended by the generation of the area of contact between the product and the saliva that governs the transfers of stimuli. The area of contact was written as the product of two functions. The first was related to the subject and was function of his masticatory performance. The second was related to the product and depended on its breakdown behavior that can be determined by in vitro tests. During the pharyngeal stage, the biomechanics of swallowing governs pharyngeal mucosa coating and aroma compounds present in this layer. These phenomena are due to a thin film flow, stationary in a soft elastohydrodynamic contact whose the kinematics is equivalent to a forward roll coating process lubricated by saliva. Two sets of conditions were distinguished. When the saliva film is thin, food bolus viscosity has a strong impact on mucosa coating and on flavour release. When the saliva film is thick, the food bolus coating the mucosa is very diluted by saliva during the swallowing process and the impact of product viscosity on flavour release is weak. This second set of condition allowed us to explain the physical origin of in vivo observations on flavour release
Festes, Gilles. "Etude des phénomènes physiques limitant les transferts d'images en lithographie optique submicronique". Toulouse, INSA, 1992. http://www.theses.fr/1992ISAT0027.
Texto completo da fonteLepage, François. "Génération de maillages tridimensionnels pour la simulation des phénomènes physiques en géosciences". Vandoeuvre-les-Nancy, INPL, 2003. http://www.theses.fr/2003INPL072N.
Texto completo da fonteThree-dimensional meshes are widely used in Geosciences for discretizing the geological objects of the problem domain, thus providing a support for the numerical simulation of various processes depending on physical properties, such as balanced unfolding, ray-tracing, or fluid flow modelling in porous and permeable rock bodies. However, to ensure accuracy, efficiency, and stability, mesh elements must meet several requirements, especially on their shape and size
Darqué, François. "Etude expérimentale des phénomènes d'adhérence". Bordeaux 2, 1994. http://www.theses.fr/1994BOR2OND1.
Texto completo da fonteAchiaou, Moulay A. "Etude des phénomènes de décantation-suspension. Approche physique et numérique dans un décanteur longitudinal fluvial". Doctoral thesis, Universite Libre de Bruxelles, 2004. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211153.
Texto completo da fonteDalili, Djmachid. "Quelques phénomènes frontières en physique des ions lourds : caléfaction nucléaire et fission à haute excitation". Paris 11, 1985. http://www.theses.fr/1985PA112110.
Texto completo da fonteIn this work we investigate new phenomena which can be observed in Heavy Ion reactions at bombarding energies between 20 and 50 MeV/u. In reactions induced by a Kr beam at 35 and 22 MeV/u we have found fragments with a kinetic energy and a mass substantially smaller than the one of the projectile. We propose a possible interpretation for their occurrence: they could be produced in a kind of nuclear calefaction phenomenon. Such a mechanism would take place because of the mean field which still plays an important role at these bombarding energies and which modifies the usual participant-spectator picture familiar at higher bombarding energies. The stability against fission of the high temperature and rapidly rotating nuclei produced in such reactions is then studied within the framework of the Thomas Fermi and Hartree Fock approximations. The fission barrier decreases with increasing temperature and angular momentum and the stability limit of the 205At nucleus is investigated