Dissertations / Theses on the topic 'SANS a SAXS'
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Dos, Santos Morais Raphael. "Interaction dystrophine-membrane : structure 3D de fragments de la dystrophine en présence de phospholipides." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1B062/document.
Full textDystrophin is a large peripheral membrane protein that provides a supporting role for sarcolemma allowing muscle cells to withstand the mechanical stresses generated during contraction / elongation processes. Genetic mutations lead to dystrophin production in truncated form or even to a total deficit in the protein leading to severe myopathies currently incurable. Designing adapted therapies requires a huge knowledge of the biological role of dystrophin. Using a structure / function approach, our aim is to determine the molecular bases involved in the interactions of dystrophin with the membrane lipids of the sarcolemma. Using a small-angle scattering approach (SAXS and SANS) combined with molecular modeling, we show that bicelles constitute a versatile membrane mimic that is particularly adapted to analyze the structure of membrane proteins. This original methodological development was exploited to characterize the structural changes undergone by dystrophin upon lipid binding. We highlight in particular that the lipid binding induces a significant opening of the coiled-coil structure of the repeat 1 of the central domain and, in conclusion, we propose an all-atom model of the protein bound to a bicelle. These thesis works (i) constitute a significant methodological contribution for the study of membrane proteins, (ii) contribute to a better understanding of the biological role of dystrophin for therapies dedicated to patients with myopathies
Gouin, Jean-Pierre. "Morphology of block ionomers : a study by SAXS and SANS." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41023.
Full textThe conformation of the polystyrene midblock in ABA vinylpyridinium materials in the solid phase was studied by SANS. The dimensions of this segment were clearly found to be identical to a homopolymer of the same molecular weight, indicating that no stretching occurs due to the presence of the two attached ionic blocks.
Georgiades, Pantelis. "Mucin structure and mucosal transport of polyphenols." Thesis, University of Manchester, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.617960.
Full textXie, Fangning. "Real-time SAXS and SANS studies of lamellar superlattices in linear and branched long alkanes." Thesis, University of Sheffield, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.500158.
Full textRabe, Christian. "Structural investigations using small angle scattering techniques and contrast variation." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2015. http://dx.doi.org/10.18452/17180.
Full textThe analysis of the small angel X-Ray and neutron scattering is an ideal tool for the discussion of the structure and interactions of submicroscopic particles. Herein, the variation of the scattering contrast enlarges the spectrum of information, additionally. As shown in the presented work, complementary probes give a detailed picture of the investigated systems. The focal point of the discussion is set on polyethylene nanoparticles and structures based on hyperbranched polyglycerol. The analyses provide, for instance, information on the mechanism that leads to an ideal arrangement of the non-branched polymer chains during the formation of the platelet-like polyethylene nanoparticles. The amorphous phase exclusively hosts the redirection of the polymer chains into the crystalline domain. This allows the unimpeded chain diffusion. The effect of defects along the polymer chain on the particle structure was studied by the analyses of polyethylene with precisely placed methyl groups. Analyses of aqueous dispersions of hyperbranched polyglycerol reveal the fractal-like character of the global molecule structure. Additionally, the significant contribution of the molecule’s microstructure to the corresponding small angle scattering was considered. The analyses of molecules composed of the hyperbranched core and a complete functionalisation with bipolar chains profited from these results. Hereby, the molecule structure in polar and non-polar media was identified. In polar surrounding the formation of well-defined aggregates was described. This provides essential information for a further discussion of this type of molecules as drug delivery platform.
Brusselle, Damien. "Auto-assemblage de métallacarboranes en solution aqueuse : un nouveau type de tensioactif." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20094/document.
Full textMetallacarboranes are anionic clusters composed of boron, carbon and hydrogen with a metallic cation sandwiched at the heart of this cluster (Co3+ in general) and highly stable in thermic and chemical point of view. These entities are trivially represented by the Greek letter "theta" where the poles are considered hydrophobic and have a negative charge delocalized and counter-balanced by an acidic proton. This high stability as well as the various properties gives a particular interest in applications such as the co-extraction of Cs and Sr in nuclear waste or in medicine for their ability to inhibit HIV protease by its hydrogen bonds. The chemistry of boron is relatively rich; a synthesis of some derivatives was performed in laboratory. It is possible to substitute specifically hydrogen by iodine or chlorine atoms or change the metallic heart by other atom as Fe3+, respectively forming diiodo- COSAN (I2COSAN), dichloro-COSAN (Cl2COSAN) and ferrabisdicarbollide (FESAN) anions. Metallacarboranes are also considered as a new class of surfactant where a first study of their self-assembly has been performed. The results of one of them, cobaltabisdicarbollide or COSAN, have shown an effect at the surface tension and theses clusters formed spontaneously vesicles in dilute regime (from 0.5 mmol/L) and by Coulomb interactions, they form micelles at higher concentration (after 15 mmol/L). But they offer more surprise by the formation of lyotropic phases in aqueous solution. Indeed, these phases, clearly identified by X-ray scattering techniques and microscopy, showed temperature and concentration dependence where a phase diagram was established for the I2COSAN in particular. Therefore, the thesis is focused on the understanding of the phenomena controlling the aggregation of these curious compounds
Eyssautier, Joëlle. "Caractérisation et Modélisation des Asphaltènes en Conditions Réactionnelles d'Hydrotraitement." Palaiseau, Ecole polytechnique, 2012. http://pastel.archives-ouvertes.fr/docs/00/66/69/75/PDF/ThA_se_Joelle_Eyssautier_2012_pour_impression.pdf.
Full textDue to a high energy demand, the petroleum industry has to focus on low quality products such as heavy oils and distillation residua, to be transformed into valuable fractions. These products show difficulties to be converted during hydrotreating processes because of their asphaltene content, which are heavy molecules with peculiar aggregation properties. Small angle scattering techniques (X rays, neutrons and light) were used to characterize the system on a wide length scale (1 nm - 1 μm). Asphaltenes in model solvents were first investigated to refine the description of nanoaggregates made of core/shell discs, organized at a larger length scale into polydisperse fractal clusters. This colloidal approach was then adapted to study the asphaltenes in processing conditions. A nanofiltration process has been performed, and the structural study of the fractions made evidence that the system is a colloidal suspension of particles. The behavior through temperature elevation depends on the length scale of interest: while clusters are sensitive to temperature, nanoaggregates persist at 300°C. The hierarchical aggregation scheme enables predicting viscosity behaviors through temperature and concentration variations. These findings on structural organization and characteristic particle sizes near processing temperatures improve the knowledge required for heavy oil transport, hydroconversion process and catalyst design
Shriky, Banah. "Thermosensitive Injectable Pluronic Hydrogels for Controlled Drug Release: Characterisation of thermal, rheological and structural properties of injectable pharmaceutical formulations." Thesis, University of Bradford, 2018. http://hdl.handle.net/10454/17364.
Full textMasson, Soizic. "Etude structurale d'un complexe de trois protéines de la division du pneumocoque, DivIB, DivIC et FtsL." Phd thesis, Université Joseph Fourier (Grenoble), 2008. http://tel.archives-ouvertes.fr/tel-00352348.
Full textMuthig, Michael [Verfasser], Michael [Akademischer Betreuer] Gradzielski, and Julian [Akademischer Betreuer] Oberdisse. "Complex SANS/SAXS data evaluation, simulation and interpretation with regard to statistical inference / Michael Muthig. Gutachter: Michael Gradzielski ; Julian Oberdisse. Betreuer: Michael Gradzielski." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1072463431/34.
Full textLorchat, Philippe. "Structure des solutions aqueuses de polyélectrolytes fortement chargés." Phd thesis, Université de Strasbourg, 2012. http://tel.archives-ouvertes.fr/tel-00759325.
Full textEyssautier, Joelle, Loïc Barré, Pierre Levitz, and Didier Espinat. "Caractérisation et Modélisation des Asphaltènes en Conditions Réactionnelles d'Hydrotraitement." Phd thesis, Ecole Polytechnique X, 2012. http://pastel.archives-ouvertes.fr/pastel-00666975.
Full textKaci, Messaouda. "Développement et caractérisation d'un nouveau procédé d'émulsification non dénaturant par transduction piézoélectrique de hautes fréquences." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0062/document.
Full textEmulsions are systems containing two immiscible liquids, one dispersed as droplets (dispersed phase) throughout the other (continuous phase). When emulsifier is added, it may interact with the other formulations compounds creating new emulsion properties. Therefore, it becomes difficult to study the role of oil phase alone on emulsion properties. In this thesis, emulsifier free emulsion was developed with high frequency ultrasounds (HFU) generated by piezoelectric ceramic transducer vibrating at 1.7 MHz. pH measurement showed significant decrease and negative electrophoretic mobility showed the accumulation of OH- at oil/water interface leading to droplets stability in the emulsion. Emulsions conductivity showed a decrease of the ions quantity in solution, which indicated formation of positive charge layer around OH- structure. They constituted a double ionic layer around oil particles providing emulsion stability. This study showed a strong correlation between turbidity measurement and proportion of emulsified oil. Unlike standard emulsification methods, emulsions made this process demonstrates stability for 30 days at 37 °C. The use of emulsions without emulsifier made by HFU for vectoring CoQ10 shows a higher cell proliferation in the case of emulsion without emulsifier. A study of emulsions without emulsifer by small angle X-ray scattering (SAXS) and nuclear magnetic resonance (1H NMR) was performed and compared to emulsions containing emulsifiers. NMR analysis showed no interactions between different compounds and the HFU manufacturing process did not cause chemical degradation or neoformed compounds. SAXS showed a thin interface between two phases with different electronic density (water/oil) for emulsions with and without emulsifiers. For emulsion with emulsifiers SAXS showed surfactant micelles diffusion signal which doesn’t appear in the emulsion without emulsifiers
BAFNA, AYUSH ASHOK. "OPTICAL PROPERTIES AND ORIENTATION IN POLYETHYLENE BLOWN FILMS." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1005857011.
Full textFang, Weiqing. "Elaboration de matériaux composites nanofils magnétiques/polymères pour la fabrication d'aimants permanents." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-01070641.
Full textKjellin, Mikael. "Structure-Property Relationships of Surfactants at Interfaces and Polyelectrolyte-Surfactant Aggregates." Doctoral thesis, KTH, Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3299.
Full textThe first part of this thesis is concerned with thestructure-property relationships in nonionic surfactantsystems. The main aim was to investigate how the surfactantstructure influences the adsorption at interfaces andinteractions between surfactant coated interfaces.Particularly, the effect of the structure of the surfactantheadgroups was investigated. These were sugar-based headgroupwith varying size and flexibility and poly(ethylene oxide)based headgroups with or without an additional amide or estergroup. The hydrophobic part of the surfactant consisted mostlyof straight alkyl chains, except for one type of poly(ethyleneoxide) based surfactant with a dehydroabietic hydrophobe.
The main technique that was used is the surface forcetechnique, with which the forces acting between two adsorbedsurfactant layers on hydrophilic or hydrophobic surfaces can bemeasured. These forces are important for e.g. the stability ofdispersions. The hydrophilic surfaces employed were glass andmica, whereas the hydrophobic surfaces were silanized glass andhydrophobized mica. The adsorption behavior on hydrophilicsurfaces is highly dependent on the type of headgroup andsurface, whereas similar results were obtained on the two typesof hydrophobic surfaces. To better understand how the surfaceforces are affected by the surfactant structure, measurementsof adsorbed amount and theoretical mean-field latticecalculations were carried out. The results show that the sugarsurfactant layers and poly(ethylene oxide) surfactant layersgive rise to very different surface forces, but that the forcesare more similar within each group. The structure-propertyrelationships for many other physical properties have beenstudied as well. These include equilibrium and dynamicadsorption at the liquid-vapor interface, micelle size, micelledynamics, and wetting.
The second part in this thesis is about the aggregationbetween cationic polyelectrolytes and an anionic surfactant.The surface force technique was used to study the adsorption ofa low charged cationic polyelectrolyte on mica, and theaggregation between the adsorbed polyelectrolyte with theanionic surfactant. The aggregation in bulk was studied withturbidimetry, small angle neutron scattering (SANS), and smallangle x-ray scattering (SAXS). An internal hexagonal aggregatestructure was found for some of the bulk aggregates.
Keywords:nonionic surfactant, sugar surfactant,poly(ethylene oxide), amide, ester, polyelectrolyte, SDS,hydrophobic surface, glass surface, mica, adsorption,aggregation, micelle size, surface forces, wetting, dynamicsurface tension, NMR, TRFQ, SANS, SAXS, mean-field latticecalculations.
Kamar, Zakaria. "Gainage de fibrilles de polymère covalent par des nanotubules auto-assemblés." Strasbourg, 2010. https://publication-theses.unistra.fr/public/theses_doctorat/2010/KAMAR_Zakaria_2010.pdf.
Full textIn this work we have prepared a new type of hybrid material from a covalent polymer and a self-assembled system, the latter forming nanotubules. We have focused our work specifically on sheathing polymer fibrils obtained by the thermoreversible gelation of a covalent polymer by these nanotubules. The systems forming nanotubules in a number of organic solvents is 3,5-Bis-(5-Hexylcarbamoyl-pentoxy)-benzoic acid decyl ester (BHPB-10), while isotactic polystyrene (iPS) forming fibrillar thermoreversible gels has been chosen. As common solvent, we considered the two conformers: cis and trans of decahydronaphthalene (decalin). The study and realization of the sheathing process was carried out by a series of techniques; differential scanning calorimetry (DSC and μDSC), atomic force microscopy (AFM), X-ray scattering and neutron scattering (SAXS, WAXS and SANS). Finally a rheological study of the gels was performed. We first studied the effect of solvent conformers on the formation of nanotubules. This study has shown that BHPB-10 nanotubules were only obtained in trans-decalin as solvent, while lamellae were obtained in cis-decalin. For ternary systems BHPB-10/iPS/trans-decalin; we succeeded in sheathing the polymer fibrils at low concentration BHPB-10, thus preparing a new type of materials. We also have observed a significant increase of the gel modulus due to fibrils sheathing
Toquer, Guillaume. "Couplages originaux entre Surfactants et Cristaux Liquides Thermotropes : Microémulsions inverses et émulsions directes." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2006. http://tel.archives-ouvertes.fr/tel-00142098.
Full textLa première étude porte sur l'organisation de systèmes lyotropes (surfactants et eau) dans un solvant thermotrope anisotrope (cristal liquide). L'existence d'une phase baptisée « nématique transparente » dans un tel système mixte thermotrope-lyotrope de type microémulsion a été en effet récemment débattue. Des expériences de diffusion dynamique de lumière, au voisinage de la transition isotrope-nématique, laissait supposer l'apparition d'une phase intermédiaire, résultant de la compétition entre l'apparition d'un ordre nématique dans le solvant et des effets d'ancrages sur les agrégats.
Nous avons caractérisé, dans un premier temps, par diffusion de rayonnement X et neutrons, la morphologie et les interactions d'agrégats, composés de bromure de didodecyldimethylammonium (DDAB) et d'eau, dans le cristal liquide 4-n-pentyl-4'-cyanobiphenyl (5CB) en phase isotrope. L'étude de l'évolution des diagrammes de phases couplée à des expériences de diffusion (X, Lumière et neutrons) a permis de montrer que l'ajout de cosurfactants permettait de faire varier continûment la taille des nanoagrégats. L'ensemble de nos données expérimentales s'explique bien par la présence d'interactions fortes de Van der Waals entre micelles, ce qui justifie en particulier l'absence de transition microémulsion/ lamellaire gonflée dans ce système. L'analyse des facteurs de structure a permis par ailleurs de mettre en évidence une seconde interaction attractive entre micelle, causée par les fluctuations paranématiques du cristal liquide, intervenant essentiellement à l'approche de la transition isotrope-nématique du cristal liquide. Nous discutons de cette nouvelle interaction à la lumière des résultats de nos expériences de diffusion.
La deuxième étude porte sur les émulsions directes eau-cristal liquide en présence de surfactants amphotropes que nous avons synthétisés et caractérisés par RMN. La formulation de ces surfactants visait à renforcer leur localisation exclusive à l'interface eau-cristal liquide. Les émulsions obtenues montrent la formation spectaculaire de gouttes allongées cylindriques de type filaments. Les propriétés statiques et dynamiques de ces objets ont été explorées et l'origine de cette instabilité est explicitée. La longueur des microtubes est modifiable par des gradients de concentration ou des variations de température ce qui nous a permis de discuter du mécanisme régissant leur morphologie.
Neto, Francisco Mariano. "Aplicabilidade de sílica mesoporosa ordenada como adjuvante imunológico." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-17122008-091941/.
Full textThis work consisted of an evaluation, from a physical standpoint, of the applicability of SB.4-15 type ordered rnesoporous silica as an inmunological adjuvant. The method of preparation and reproducibility of the material properties were initially studied. Those conditions are necessary to synthesize large quantities of the material (N 100g). Vacuum calcination, whem compared to the process executed in A5 and air, results in a better ordered mesoporous structure. For biological applications, the potential to encapsulate antigens in the material was analyzed through studies of incorporation of Bovine Serum Albumin (BSA) and vaccine for Hepatitis A. A successful incorporation of BSA in the silica was observed, with that protein being lodged inside the porous structure. A similar result was obtained for the vaccine for Hepatitis A. The most efficient incorporation process was determined by keeping the solution at rest and drying it through evaporation. The applicability of silica as an immunological adjuvant for animal use was evaluated through PIXE analyses of the silicon accumulation in mice\'s organs. Silica was administrated to Swiss mice through oral and intramuscular ways and the silicon content of different organs was compared to the figures of the control group. The silica´s presence was detected on certain organs, and it was completely eliminated after 70 days. Besides that, toxicological studies accomplished at the Butantan Institute showed that the silica is efficient for inductíon of humoral response and it is non-toxic.
Leconte, Michel. "Codes sans répétition." Paris 7, 1985. http://www.theses.fr/1985PA07F073.
Full textArdeeff-Garé, Isabelle. "L'enfant sans filiation." Toulouse 1, 1999. http://www.theses.fr/1999TOU10019.
Full textHow is it possible that a child can be deprived of family or parents? The first right of a child is obviously to know his parents. But some parents don't want to take care of their children. According to French law, those parents can abandon their children either before the birth of the child (in France, it's called "accouchement sous X") or after the birth, if the child is not 1 year old (what's called, in France, "abandon anonyme"). The thesis demonstrates that the opportunity that French law offers to the parents to abandon their children must be preserved, because it's a means to protect the child from abortion or murder. And those possibilities to abandon a child are not in opposition with international declarations about children's rights. However, the situation of a child deprived of family must be shorter than possible. So, French law gives the child the opportunity to be adopted. Some articles of French law also impose on the parents to take care of their children. But it's not a solution: it's useless to oblige a man or a woman to be a parent
Sirois-Marcil, Justin. "L'érection sans prescription." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/27378.
Full textKalmbach, Courtney Nicole Kalmbach. "Vamp Sans Amp." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1470248833.
Full textLeBlanc, Ricahrd. "Habermas sans culottes." Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/50240.
Full textArts, Faculty of
Central Eastern Northern European Studies, Department of
Graduate
Beldame, Yann. "Sans papiers, sans destin : essai d'ethnographie critique dans l'Espagne de l'immigration." Paris, EHESS, 2010. http://www.theses.fr/2010EHES0419.
Full textDiop, Amadou Samba. "Sans-papiers, sans politiques ? : Contribution à une étude comparée du traitement public des sans-papiers en France et en Suède." Thesis, Paris Sciences et Lettres (ComUE), 2018. http://www.theses.fr/2018PSLED075.
Full textDoes Article 1 of the Universal Declaration of Human Rights not state that "All women and men are born and remain free and equal in rights"? Do non-discrimination as well as equal treatment of subject of law in court not constitute the core principles relating to the protection of human rights? Law and practices tend to not consider the so-called "undocumented migrants" as public service users, thus denying their legal personality. However, the respect of foreigners’ rights is an essential sign of the degree of protection and effectiveness of rights and freedoms in a country. In recent years, associations and organizations working for the respect of human rights have constantly emphasized the gap between the officially proclaimed rights and the rights actually exercised by foreigners on the European Union territory. Consequently, the problem of real harmonization and communitisation of European migration policies has arisen. This thesis put forward a contribution to a detailed and comparative analysis of the public treatment of undocumented migrants in France and Sweden. It’s is motivated by my personal experience of the issue dealing with foreigners’ law in Europe and insists on the mutation of the collective action through juridification and the Europeanization. The numerous difficulties encountered by the public authorities to promote a singular public policy specific to undocumented migrants draws a set of hypotheses that will help us to better understand and identify the problem
Amort, Joseph Scott. "Sans fin sans (endlessness): for guitar, seven wind instruments and double bass." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12470.
Full textBehlouli, Abdeslam. "Simulation du canal optique sans fil. Application aux télécommunications optique sans fil." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2308/document.
Full textThe context of this PhD thesis falls within the scope of optical wireless communications for applications in indoor environments. To discuss the performance of an optical wireless link, it is necessary to establish a characteristic study of the behavior of the optical wave propagation channel. This study can be realized by measurement or by the simulation of the channel impulse response. After describing the composition of an optical wireless link and reviewing existing simulation methods, we present our new simulation algorithms channel in realistic environments by focusing on their performances in terms of accuracy and their complexity in terms of computation time. These methods are based on solving the light transport equations by ray-tracing techniques associated with stochastic Monte Carlo integration methods. The classical version of these methods is the basis of three proposed simulation algorithms. By applying an optimization using Markov Chain, we present two new algorithms. A performance assessment of our simulation algorithms is established in mono and multi-antenna scenarios of our simulation algorithms. Finally, we present the application of these algorithms for characterizing the impact of the simulation environment on the performances of a visible light communication link. We particularly focus on the transmitter models, surface coating materials, obstruction of the user's body and its mobility, and the geometry of the simulation scene
ROUXIN, HELENE. "Essai d'un regime sans cereales et sans lait dans la polyarthrite rhumatoide." Montpellier 1, 1989. http://www.theses.fr/1989MON11221.
Full textEl, Mahboubi Firdaous. "Stockage adaptatif pour noeud de capteur sans fil autonome et sans batterie." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30218/document.
Full textEnergy autonomy is a major challenge in the massive deployment of wireless sensor networks in numerous applications. Energy harvesting and storage can serve as solutions to the autonomy issues. However, the harsh environment of certain applications requires a long lifetime since the use of batteries for storage is prohibited. We then resort to storage on ultra-capacitors. This type of storage has disadvantages that require a compromise between 3 factors: the fast charge of ultra-capacitors (low capacity), the maximum energy storage (strong capacity), and the maximization of stored energy utilization (low residual voltage). To meet these seemingly contradictory criteria, we propose three self-adaptive storage architectures. The first consists of a matrix of four identical ultra-capacitors, interconnected by switches, whose equivalent capacity adapts to the stored energy. The second and third architectures consist of two ultra-capacitors, one of low capacity and the other of large capacity, the difference between the two architectures being related to the number and type of switches used. The self-adaptive storage architectures that we propose include a suitable self-powered control circuitry to vary the apparent capacity of the device. In addition, each architecture allows a cold start with completely empty ultra-capacitors. These three architectures were first optimized through simulation, and then validated experimentally with discrete components. Finally, we implemented the self-adaptive storage architecture with two ultra-capacitors in a completely wireless measurement system, using an energy harvesting source and its associated electronics for its power supply, and demonstrated the relevance of this approach of reconfigurable storage. In conclusion, we deduce that the topologies can reach an efficiency of energy usage of up to 94.7% by employing discrete components, a value that could be further improved through the exploitation of a silicon integrated version for both the control circuitry and the ultra-capacitors
Guérin, Bonvoisin Françoise. "La Personne sans sujet." Rennes 2, 1993. http://www.theses.fr/1993REN20004.
Full textProsopagnosia is not an agnosia and is not limited to gaces. It is a part of a familiarity disorder. Familiarity and evocation are both involved in the memory. Memory, as any concept, is an identity and a unity. As an identity, in contemporary neuropsychologia, it is so global that it cannot be opposed to anything. It interferes with other processes and must be brought out of other processes properties. After, we still must separate it from history. Memory is not a scientific conceptual unity : amnesia does not exist alone, pure, but is always associated to other diseases (temporopastial disorientation for instance). The hypothesis defended in this thesis (according to J. Gagnepain's mediation theory) is that amnesia is part of a more global process which j. Gagnepain calls somasia : it is the border (frontier) of the body and the environnement (extrabody space) ; in other words, it creates the individual (both body and space). Normally, what Gagnepain calls person (that is ego or history) finds its origin in the biological individual but it is an excentration process. Asomasia which impaires the individual, deteriorates the dialectic between the individual and the person. It explains why amnesic patients have relation disorders. Several cases of asomasia are reported. It poses the question of unilateral neglect. Is there hemiasomasia?
Lucchelli, Juan Pablo. "Un fétichisme sans qualités." Paris 8, 2002. http://www.theses.fr/2002PA082210.
Full textFARIA, D. N. "Estudo e Determinação de Diagramas de Fase e Propriedades Físico-químicas em Sistemas Aquosos Bifásicos (sabs) Formados Por Peg/l64 + Sais de Fosfato e em Misturas Binárias e Ternárias Baseadas em Sabs." Universidade Federal do Espírito Santo, 2015. http://repositorio.ufes.br/handle/10/7354.
Full textstudo e determinação de diagramas de fase e propriedades físico-químicas em sistemas aquosos bifásicos (SABs) formados por PEG/L64 + sais de fosfato e em misturas binárias e ternárias baseadas em SABs
Leite, Brenno Santos. "Contribuição ao estudo do mecanismo de formação e precipitação de sais de sódio em evaporadores de licor negro de eucalipto visando seu controle e prevenção." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266677.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
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Resumo: O licor negro é um subproduto do processo de digestão da madeira em fábricas de celulose e papel, composto por frações orgânicas e inorgânicas. Após o processo de digestão, o licor negro apresenta um teor de sólidos secos de aproximadamente 15% e para que possa ser queimado na caldeira de recuperação química é necessário elevar esse teor para valores próximos de 75%. Este processo de concentração do licor é feito em um sistema de evaporação múltiplo efeito. Propriedades físico-químicas do licor, tais como massa específica, teor de sólidos secos, viscosidade e teor de sais de sódio sofrem forte dependência do tipo de madeira processada e das condições de operação durante o processo de digestão. O conhecimento destas propriedades e da relação entre elas auxilia no controle do processamento do licor e pode permitir um maior aproveitamento energético de toda a unidade de recuperação. Quando o licor negro atinge altas concentrações de sólidos (superiores a 50%), observa-se precipitação de sais responsáveis pela formação de incrustações na superfície de transferência de calor dos evaporadores e concentradores, reduzindo a eficiência do sistema de evaporação. O presente trabalho tem como objetivo geral, investigar e compreender o mecanismo de formação e precipitação de sais de sódio, durante o processo de concentração do licor negro, os quais podem formar incrustações que prejudicam o bom desempenho do processo, por meio de um estudo e correlação de suas propriedades físico-químicas, avaliando sua influência na solubilidade dos sais inorgânicos presente no licor. Ressalta-se que os primeiros sais a precipitarem são os sais de sódio, mais especificamente o carbonato e o sulfato de sódio. Sendo assim, compreender o mecanismo que promove a redução de sua solubilidade é muito importante para entender o comportamento dos demais sais presentes no licor negro. Foi possível desenvolver um modelo capaz de avaliar a solubilidade do sulfato de sulfato de sódio considerando as características especificas do licor negro. Também, com base neste modelo de solubilidade foi possível compreender a lógica do efeito da inversão de solubilidade de um determinado sal sobre o comportamento do sistema, possibilitando compreender o mecanismo de formação das primeiras precipitações no licor negro de eucalipto
Abstract: In pulp and paper mills the aqueous solution extracted from the pulping process in the wood digester is named black liquor, which consists of organic and inorganic compounds. When leaving the digester sector black liquor has about 15 %/mass of solids and to be used as a fuel in the recovery boiler it is necessary to raise this solids content to 75 %/mass, removing water in a battery of multiple effect evaporators. Some black liquor physical properties, such as density, solids content, viscosity and sodium salts content, are strongly dependent on the kind of wood processed (hardwood or softwood) and on operating conditions during the digestion process. Knowledge and comprehension of the relationship between these physical properties of black liquor are essential for studies aiming at a better energetic performance of the black liquor evaporation unit. When black liquor reaches higher solids content (above 50 %/mass), scaling formation is observed on the heat transfer surfaces of evaporators and concentrators, due to precipitation of sodium salts, reducing the overall efficiency of this equipment. The aim of this work is to investigate and comprehend the mechanism of formation and precipitation of sodium salts in eucalyptus black liquor evaporators, through the study of the relationship between some physical proprieties (density, viscosity, total solids content) evaluating their influence over the solubility of sodium salts content in industrial black liquor samples. This greater comprehension and knowledge of the mechanism which is responsible for the reduction of the solubility of these salts is very important for the development of alternative methods to avoid or reduce scaling formation. The results have shown that it is possible to use a model to estimate sodium sulfate solubility limit and comprehend the formation mechanism of the first scaling and the behavior of the salts in the system
Doutorado
Sistemas de Processos Quimicos e Informatica
Doutor em Engenharia Química
Richard, Théo. "Capteur sans électronique pour la surveillance sans fil de la santé des infrastructures maritimes." Thesis, Nantes, 2020. http://www.theses.fr/2020NANT4064.
Full textThe natural evolution of hydraulic concrete as well as the effect generated by pathogens (i.e. chloride ions) have a direct impact on the durability of reinforced concrete structures. This thesis project aims at implementing a new SHM approach to engineering structures. This approach is based on the development of a passive, autonomous and low-cost sensor, directly integrated into the concrete coating of the structures and communicating wirelessly with external interrogators. This technological solution aims at establishing a predictive maintenance process based on the monitoring of chloride penetration fronts and therefore of reinforcement corrosion. A preliminary phase of digital modelling and experiments allowed us to optimize the choice of the sensor topology. The first prototypes of drowned antennas insensitive to changes in the dielectric states of healthy and degraded concrete were produced. These antennas were then coupled to loads on the periphery of their radiating surfaces. These fillers are sensitive to chlorides. The combination of these two elements defines the architecture of the passive and autonomous sensor. The operating principle of the sensor is related to the length reduction of its load, which is in direct contact with chlorides due to corrosion. his degradation induces a change in the resonance frequency of the sensor, which acts as an indicator of degradation of the concrete coating. By reflecting the EM waves emitted from an antenna on the surface of the structure, it is possible to recover information about the corrosion state of the load. This defines the principle of our technological solution, without power supply and without integrated electronics. Finally, extensive experimental campaigns on laboratory-controlled concrete test bodies which represent the regional fleet of structures, enabled us to validate our approach
Moussa, Ali Abdouramane. "Diagnostic sans modèle a priori." Phd thesis, Université Henri Poincaré - Nancy I, 2011. http://tel.archives-ouvertes.fr/tel-00604090.
Full textCaron, André. "Transformation d'expressions relationnelles sans variables." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq25523.pdf.
Full textGrenier, Karen. "AVEC OU SANS MOTIF(S)." Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26019/26019.pdf.
Full textPernot, Denis. "La Société sans personnalité morale." Lille 3 : ANRT, 1989. http://catalogue.bnf.fr/ark:/12148/cb37617505c.
Full textDaudemaine, Bréheret Colette Beaud Laurence. "Autisme une pensée sans langage ? /." [S.l.] : [s.n.], 2007. http://castore.univ-nantes.fr/castore/GetOAIRef?idDoc=19316.
Full textKrantz, Thomas Bérard Bergery Lionel. "Holonomie des connexions sans torsion." [S.l.] : [s.n.], 2007. http://www.scd.uhp-nancy.fr/docnum/SCD_T_2007_0030_KRANTZ.pdf.
Full textLepavec, Cécile Grimaud Nicole. "Syndrome des jambes sans repos." [S.l.] : [s.n.], 2007. http://theses.univ-nantes.fr/thesemed/PHlepavec.pdf.
Full textKrantz, Thomas. "Holonomie des connexions sans torsion." Nancy 1, 2007. http://docnum.univ-lorraine.fr/public/SCD_T_2007_0030_KRANTZ.pdf.
Full textWe study the finite-dimensional Lie algebra representations in connection with their lattice of subrepresentations. We consider the case where the representation admits two pairs of supplementary invariant subspaces. We show that in this case the representation admits a canonical decomposition in three subrepresentations with well defined caracteristics. We strengthen the results for the situation where the representation admits a pair of supplementary invariant subspaces and an invariant reflexive form, respectively an invariant metric. In the geometric part we apply the preceding results to the study of the holonomy representations of a manifold equipped with a torsion-free connection or in particular a pseudo-Riemannian manifold. Finally we have a closer look at representations of type ‘direct sum of V and V dual’ or ‘V tensor the trivial representation of dimension 2’, which appear in this context, and we caracterize the torsion-free connections admitting a holonomy representation of this kind
Moutot, Gilles. "Adorno, un matérialisme sans images." Montpellier 3, 2008. http://www.theses.fr/2008MON30065.
Full textThis work aims to present the specificity of Adorno’s materialism. To that end, the issue of how commodity fetishism extends itself in advanced capitalism provides our point of departure. First considered in the dialogue with Benjamin in the 1930’s, this theme quickly appears as a critical instrument that Adorno uses, even as he refashions it, in a wide variety of fields: from aesthetics to epistemology to politics. So it is that the attention devoted to experiences of non-identity is materialist. Consequently, what is at stake in Adorno’s thought may be schematically set between two poles: that of suffering, which bears witness to an individuation damaged by the behavioral norms of a pathogenic socialization process, and that of aesthetic experience, wherein there emerges a relationship to difference as no longer measured against unity. This amounts to requiring that rationality be able to adjust its operations by means of sensitiveness to what Adorno calls “unregimented experience”. Thus, Adorno develops a rational critique of instrumental reason that is fully original. By paying attention to the somatic and psychological resonances – and dissonances – of subjectivation processes and social interactions, this critique particularly questions approaches that, following Habermas, claim to derive from the normative potential supposedly inherent in language and communication. Adorno’s call for the Enlightenment to subject itself to critical self-reflection maintains its implacable actuality – because it is so untimely
Suc, Bertrand. "Les hepatectomies sans transfusion sanguine." Toulouse 3, 1990. http://www.theses.fr/1990TOU31182.
Full textPernot, Denis. "La société sans personnalité morale." Besançon, 1988. http://www.theses.fr/1988BESA0001.
Full textIn french law, the companies are acknowledged moral status from the moment when they get registered in the trade and companies registers. The partnerschips (la societe en participation et la societe creee de fait) are exceptions, in so far as they are not subject to the legal necessity of publicity and to registration. In consequence, they do not constitute corporate bodies separate from the partners who from them. They have no patrimony of their own, no legal competency. The object of this work with its references is to study the legal requisites of these partnerships which, in their similarities, are so original
Vartin, Joel. "Cartes a memoire sans contact." Paris 11, 1990. http://www.theses.fr/1990PA112297.
Full textTonneau, Olivier. "Diderot : la philosophie sans fondement." Paris 4, 2007. http://www.theses.fr/2007PA040049.
Full textDiderot, a materialist? We suggest he is first and foremost a moralist. Aware that “atheism is very close to a kind of superstition as puerile as the other” (to Mme de Maux, October 1769), he opposes religious fanatism but also the emergent scientism which turns sciences such history, sociology, biology and economy, into new dogmas. Book one: Diderot’s materialism is seen as the foundation of his thought because we expect him to legitimize his critique of the established order and to prevent the threat of immorality in a world without God. But many texts, especially the dialogues, show that criticism need not be founded on facts, and that the threat of immorality – largely illusory – could not be answered by a demonstration. The foundations of morals must be sought in practices and the will; their means is an educated reason; their finality is not given but constructed. Book two: “Strictly speaking, there is only one sort of causes: physical causes”. It follow that “freedom is a word empty of meaning” (to Landois, 29 June 1756). These axioms seem to destroy notions of responsibility and shared values: moral discourse refers to nothing real. But these consequences rest upon an impoverished conception of language, which Diderot always combated. The fondationaliste materialist refers language to the physical, but language ads to the physical and constitutes a form of life in which we see ourselves as free and responsible. This form of life must be protected; this demands that we renounce our craving for a factual foundation of values
SANGLA, IBAN. "Mitochondriopathies musculaires sans atteinte oculaire." Aix-Marseille 2, 1993. http://www.theses.fr/1993AIX20802.
Full textRanaivo, Anne-Sophie. "Sans domicile fixe et droit." Thesis, Paris 1, 2018. http://www.theses.fr/2018PA01D083.
Full textHomeless - people without "homes" and living in a situation of great precariousness and on the fringe of society - are a priori also on the fringe of law. However, the homeless are subjects of law. Therefore, they can be the subject of a legal study.This thesis aims to demonstrate that French positive law is conceived in such a way that it contributes very little to improve the situation of extreme precariousness of the homeless and even, conversely, it makes it worse. At First, the research shows that the rules of law provide only an ineffective protection to the homeless, despite they recognise many rights to guarantee a basic subsistence level, they are the bottom of a public policy dedicated to the fight against homelessness and they provide a framework for restrictive measures of freedom designed to protect the most vulnerable people. Then, in a second step, the research highlights that law is still applies to the detriment of the homeless. Reminiscent of the repression of the poorest, inherited from history, the law leads to increase the exclusion of the homeless or even to punish them.The study concludes on the observation of the persistent ambivalence of a society that mobilizes the law to protect the homeless and at the same time to protect itself from them