Tesis sobre el tema "Attante"
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Gosse, François. "Attaque de panique et angoisse de séparation". Bordeaux 2, 1990. http://www.theses.fr/1990BOR23056.
Texto completoChomarat, Nadine. "Attaque enzymatique d'un tissu conjonctif, la peauTexte imprimé". Toulouse, INSA, 1993. http://www.theses.fr/1993ISAT0022.
Texto completoMASSAT, CATHERINE. "Spasmophilie ou attaque de panique ? contribution a leur etude". Toulouse 3, 1991. http://www.theses.fr/1990TOU31131.
Texto completoBruneau, Nicolas. "Attaque par canaux auxillaires multivariées, multi-cibles et d'ordre élevé". Thesis, Paris, ENST, 2017. http://www.theses.fr/2017ENST0025/document.
Texto completoSide Channel Attacks are a classical threat against cryptographic algorithms in embedded systems. They aim at exploiting the physical leakages unintentionally emitted by the devices during the execution of their embedded programs to recover sensitive data. As such attacks represent a real threat against embedded systems different countermeasures have been developed. In thesis we investigate their security in presence of multiple leakages. Indeed there often are in the leakage measurements several variables which can be exploited to mount Side Channel Attacks. In particular we show in this thesis the optimal way to exploit multiple leakages of a unique variable. This dimensionality reduction comes with no loss on the overall exploitable information. Based on this result we investigate further how such dimensionality reduction methodscan be applied in the case of protected implementations. We show that the impact of such methods increases with the security “level” of the implementation. We also investigate how to exploit the leakages of multiplevariables in order to improve the results of Side Channel Analysis. We start by improving the attacks against masking schemes, with a precomputed table recomputation step. Some protections have been developed to protect such schemes. As a consequence we investigate the security provided by these protections. In this context we present results which show that the main parameter to evaluate the security of the masking schemes is not sufficient to estimate the global security of the implementation. Finally we show that in the context of masking scheme with shuffling the optimal attack is not computable. As a consequence we present a truncated version of this attack with a better effectiveness
Steiner, Marion. "Analyse von Netzwerkangriffen : Einsatz von Simulationen zur Steigerung der Awareness /". Saarbrücken : VDM, Müller, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?id=2874012&prov=M&dok_var=1&dok_ext=htm.
Texto completoSteiner, Marion. "Analyse von Netzwerkangriffen Einsatz von Simulationen zur Steigerung der Awareness". Saarbrücken VDM, Müller, 2003. http://deposit.d-nb.de/cgi-bin/dokserv?id=2874012&prov=M&dok_var=1&dok_ext=htm.
Texto completoSbresny, Katja. "Hämodynamik cerebraler Gefässe und kognitive Funktionen bei Patienten mit transitorischer ischämischer Attacke". [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968764118.
Texto completoWioland, Laetitia. "Attaque du système nerveux central par la toxine epsilon de Clostridium perfringens". Strasbourg, 2013. http://www.theses.fr/2013STRAJ128.
Texto completoRamirez, Lopez Alberto. "Mise en évidence d'une attaque microbienne de dérivés de lignine en anaérobiose". Lille 1, 1987. http://www.theses.fr/1987LIL10083.
Texto completoRamirez, Lopez Alberto. "Mise en évidence d'une attaque microbienne de dérivés de lignine en anaérobiose". Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376091611.
Texto completoKharouf, Riad. "Caractérisation des défauts par attaque chimique dans les couches minces épitaxiales de silicium". Paris 11, 1985. http://www.theses.fr/1985PA112023.
Texto completoMelato, Christine. "Les "phobosocialités" : approche psychopathologique des adolescents en attaque et fuite du lien intersubjectif". Lyon 2, 2006. http://theses.univ-lyon2.fr/documents/lyon2/2006/melato_c.
Texto completoThis research proposes a model for a psychopathologic comprehension of “phobosocialities” based on adolescents called “delinquents” and “inhibited”. They were received in a paediatric-psychiatric service and in educative residences ; and were taken in charge using a psychodramatic set-up. “Juvenile phobosociality” constitutes a syndrome which is manifested by symptoms (acts of attack of, or flight from the intersubjective link). These come about, in a defensive dynamic of psychic survival against a hold on the ego and a threat of psychic disintegration, linked with a persecutory object and an incorporated intruder. These acts are lead by an intricated survival drive, which means the self-conservation aspect of the death drive. The structural states and processes and the “short-circuit” of psychic functioning (tested through conflicts or tested by primal repression) in this syndrome are based on the psychic problematics of seduction, differentiation, separation and the intrication between the processes which enable symbolisation. An anaclitic relation to object is the consequence. Our viewpoint on psychodrama includes the slant it can have as a methodical grid that relates a diffracted deposit on the container-content space-time and thematic of the set-up
Moufak, Fatiha. "Attaque littorale par corrosion de calcaires pléistocènes au sud-ouest de Rabat (Maroc)". Brest, 1986. http://www.theses.fr/1986BRES1003.
Texto completoThis essay continues with more precision the work carried on in 1954 by Guilcher and Joly on the Atlantic coast of Morocco. It concerns the sector at the south west of Rabat over a little more than twenty kilometers. This area consists of a coastal plain, with a littoral karst developed in pleistocene eolianites under the influence of a strong surf. The intertidal zone shows a rochy platform with steps separated by low, continuous rims. In the supralittoral, spray zone, very sharp lapies are found. Such forms do not derive from mechanical erosion, but from a conbination of biological and physico-chemical factors influenced by the climate. These coastal forms resemble very much those found in some intertropical and subtropical countries. Atlantic Morocco seems to be one of the countries where such featover are but developed
Moufak, Fatiha. "Attaque littorale par corrosion de calcaires pléistocènes au sud-ouest de Rabat, Maroc". Lille 3 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb375998024.
Texto completoMelato, Christine Duez Bernard. "Les "phobosocialités" approche psychopathologique des adolescents en attaque et fuite du lien intersubjectif /". Lyon : Université Lumière Lyon 2, 2006. http://theses.univ-lyon2.fr/sdx/theses/lyon2/2006/melato_c.
Texto completoBossard, Cyril. "L'activité décisionnelle en situation dynamique et collaborative : application à la contre-attaque au football". Brest, 2008. http://www.theses.fr/2008BRES2044.
Texto completoThis research work is part of an approach borrowed from ergonomics and cognitive psychology, and can be broken down into the following four stages: empirical analysis of the process, modeling, simulation, and evaluation. Our first study deals with identifying the content and conditions of the activation of 12 expert football players’ typical schemata. During a specially designed study, behavioural data was recorded supplemented by verbal data collected during self- confrontation interviews. A content analysis conducted in context identified recurrent meanings produced by the experts. At group level, the analysis reveals the emergence offive forms of coordination. Results show that decisionmaking is based on experts’ recognition oftypical situations, the flexibility of schemata, and the evolution of the coordination of actions between teammates on the basis of shared context. Modeling obtained from the analysis of experts’ decision-making processes enabled us to enrich the virtual players’ digital model. In order to evaluate the behavioral credibility of these agents, we conducted an in virtuo experiment inspired by the Turing test, carried out on 48 subjects. Results suggest that novice subjects immersed in the virtual environments do not recognize the behavioral differences between autonomous virtual agents and avatars (agents controlled by humans). This study enables us to consider the potential applications of the virtual environment CoPeFoot both as a research tool and as a tool for assisting in training methods
Lemoine, Alain. "Étude de la production d'informations dans le cadre de la transmission instantanée du ballon en football". Amiens, 2003. http://www.theses.fr/2003AMIE0009.
Texto completoModern football (soccer) relies heavily upon defensive strategies and scoring a goal is more and more difficult for attackers. In fact, players in possession of the ball has less time and space at his disposal. On the other hand, reducing the number of touches on the ball allows attackers to play faster. We studied 40 attacks and we conclude that one-touch passing is economic, reliable and safety. One-touch playing needs attackers to read the game and to take possession of free space before the defenders. Also they have to pass the ball systematically in an opposite direction during they stay close to each others so that distance between them keep still the same. In the end, attackers circumvent the defensive system with a simply game and a very clear and simple information. Then we are able to explain some principles to help young players learning football
Fascio, Valia. "Etude de la microstructuration du verre par étincelage assisté par attaque chimique : une approche électrochimique /". [S.l.] : [s.n.], 2003. http://library.epfl.ch/theses/?display=detail&nr=2691.
Texto completoTiemoko, Adamou. "Etude expérimentale et modélisation de la phase de filtration : lavage du minerai d'uranium après attaque". Vandoeuvre-les-Nancy, INPL, 1991. http://www.theses.fr/1991INPL001N.
Texto completoCORDELIER, PHILIPPE. "Modelisation du travail des machines a attaque ponctuelle evolution vers les creusements en roche dure". Paris, ENMP, 1989. http://www.theses.fr/1989ENMP0215.
Texto completoKervella, Yann. "Classification des techniques de frappe en football et modélisation des réussites en compétition : l'exemple des passes d'élimination de l'expert". Rennes 2, 2002. http://www.theses.fr/2002REN20001.
Texto completoThe present study, conceived as a technological approach to football, is intended above all as a practical method to define and typify the way footballers actually kick the ball. The classification is built up by comparison and contrast between the concrete feedback gleaned from interviews conducted with elite players on their ball-kicking experiences in competitive play and those factors corroborated by the scientific study of movement. This tool aims to be wide-ranging, covering all aspects of a player's movements when kicking the ball, as all levels of skill and participation. Then, working from the analysis chart thus presented, the study goes on to conceptualize the most appropriate procedures for passing the ball in top-level competitive situations so as to neutralize the opponent. The attempts to wrong-foot the opponent, creating fleeting open spaces, confront the player performing the pass with a conflict between speed and precision of his movements during exectution. Mastery of this time pressure constitutes a major obstacle to success for elite performers. The present study defines, by means of a statistical model, the pertinent motor principles behind this specific type of pass both in senior competitive play and in top-rank under-13s These innovative technical rules, valid for both groups, confirm the usefulness of this research work. They open up coaching perspectives both in terms in improving passing during practice sessions and for training tomorrow's professional players
ABOULIATIM, AMINE. "Silicium poreux de type n obtenu par attaque photoelectrochimique a partir de silicium monocristallin et polycristallin". Rennes 1, 1996. http://www.theses.fr/1996REN10081.
Texto completoScheef, Björn Ole [Verfasser]. "Diagnostische und prognostische Evaluation der transitorischen ischämischen Attacke nach der neuen gewebebasierten Definition / Björn Ole Scheef". Lübeck : Zentrale Hochschulbibliothek Lübeck, 2018. http://d-nb.info/1151823473/34.
Texto completoSalero, Paul. "Elaboration et caractérisation d'alliages Mg-Ca pour un procédé de minéralisation de l'eau par attaque électrochimique". Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0045.
Texto completoThe Mg-Ca alloys are biocompatible and biodegradable alloys widely used for biomedical applications such as bioresorbable implants because of their corrosion rate and degradation behaviour into human body. These solutions have inspired the SEB Group to develop a new process for the mineralization of water by dissolving Mg-Ca alloys. The objective of this thesis is to design new Mg-Ca alloys choosing the appropriate production techniques and optimizing elaborations settings and then, to work on the dissolution process assisted by a current controling of dissolution parameters. Magnesium and calcium being very reactive metal in contact with the atmosphere, the development Mg-Ca alloys was done in a neutral atmosphere. It is possible to obtain a stable microstructure with calcium contents between 0% and 33 atomic% through the intermetallic form Mg2Ca. It's possible to obtain equilibrium microstructures consisting of dendrites (Mg if 0 at.%
Ouellet, Steeven. "Corrosion et protection du nickel en milieux aqueux faiblement alcalins". Thesis, Université Laval, 2009. http://www.theses.ulaval.ca/2009/26051/26051.pdf.
Texto completoRagoug, Rim. "Attaque sulfatique externe des matériaux cimentaires : Impact de différents facteurs âge, composition du liant, présence de chlorures". Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1148/document.
Texto completoIn industrial practice, concrete structural elements are exposed to various physical and chemical aggressions as soon as their formwork is removed. This early age exposure has an obvious influence on the element future transfer properties. Indeed, in some cases, these structures are directly immersed in sea water, rich in chloride and sulfate ions. Ingress of sulfate ions from the external environment and its consequences on the microstructure are known as External Sulfate Attack (ESA). Sulfate ion in seawater or underground can attack the cement paste leading to expansion and strength loss. This expansion is usually related to ettringite and gypsum precipitation. The chloride ions can cause corrosion of the reinforcements steel bars. This two pathologies are widely studied in the literature. However ESA is still controversial, which may explain the need of a European standardized test. Predicting the durability of concrete under conditions involving an early age exposure, the inclusion of chloride and sulfate ions and the pH of the external mixtures can be very complex. One of the aim of this work is to purpose a test as representative as possible of field conditions, particularly to study the ESA under controlled conditions (the pH and the external solution content). Tests are done in saturated and partially-immersed conditions. We focus on the initiation process of this degradation. The physicochemical aspects of ESA are studied. The impact of an early age exposure is highlighted in the case of ESA and chloride ingress. The microstructure changes are monitored by using several experimental techniques such as NMR (29Si and 27 Si), ICP, TGA, XRD and SEM. These analyses showed a neutral effect of an early age exposure on the sulfate ingress in both cement types (CEM I and CEM III/A). However, a negative effect of slag cement is observed after only 3 months of exposure the sulfate sodium solution at early age. Also, neither cracker when the slag cement paste are exposed after curing. Conversely, Portland cement paste resist very well and long to ASE, for an early age exposer and fail for the cured specimens. Ionic competition in the coupling case is highlighted. This competition has a mixed effect on the transport and attachment of chloride ions. The ion binding capacity is greater in the case of cement CEM III / A, in the presence or absence of sulfate ions.Key words: cement paste, External sulfate attack, ESA, early age, chloride and sulfate ingress, marine environment, RMN 29 Si and RMN 27Al, ATG/ATD, ICP
Benik, Steffen [Verfasser]. "Sekundärprävention nach leichtem Schlaganfall oder transient ischämischer Attacke : Analyse der Versorgungssituation und Modellierung eines Unterstützungsprogramms / Steffen Benik". Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2014. http://d-nb.info/105690805X/34.
Texto completoLe, Quang Gaëtan. "Une analyse de la régulation bancaire par le marché après la crise : la discipline de marché contre-attaque". Thesis, Paris 10, 2019. http://www.theses.fr/2019PA100092.
Texto completoThe great financial crisis can be interpreted as the failure of market discipline: banks were indeed massively bailed out to prevent the financial system from collapsing. After the crisis, banking regulation has thus evolved to tackle the new issues raised by the crisis. Market discipline is nonetheless still given a great importance in the new framework. In this thesis, we study how market discipline has been reactivated after the crisis. We specifically focus on the question of information disclosure (which lies at the core of both accounting rules and of the third pillar of Basel 3) and on that of the promotion of market discipline though the implementation of regulatory requirements in subordinated instruments as coco bonds. To do so, the first chapter of this thesis is dedicated to an analysis of the relationships between information disclosure, transparency and financial stability. Doing so, we show that those relationships are ambiguous so that information transparency cannot be thought as a sufficient condition for market discipline to work efficiently. The second chapter of this thesis inquires what could be the consequences of the implementation of the accounting rules that have been developed after the financial crisis on the behavior of banks. Finally, in the third chapter of this thesis we show that the current will to enforce market discipline through complex financial instruments (such as coco bonds) appears as a dangerous oversight of history. Those bonds are indeed associated with a great systemic risk and could thus act as a transmission channel of a crisis, precisely as securitized products did during the last crisis
Drean, Virginie. "Dynamique et stabilité des structures à double fronts d’ablation en fusion par con?nement inertiel en attaque directe". Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13968/document.
Texto completoThis PhD thesis adresses the dynamics and the stability of double ablation fronts structures in direct-drive inertial confinement fusion (ICF). In the first part, these structures have been obtained using the hydrodynamic code CHIC calculations. By irradiating solid targets of moderate Z such as aluminium, silicium, brominated doped plastic, and plastic with ICF like laser intensities, radiative effects become non negligibles and modify the target hydrodynamics. Two ablation fronts separated by a quasi-constant density plateau are then observed. The dynamic of such structures is then qualitatively characterized. The fuel (DT) preheat due to self-emitted radition of such ablators is then studied. A new theoretical model, based on an isobaric approximation in the ablation region allows us to understand the complex physical mecanisms involved in the formation and the dynamics of these structures, using analytical expressions for the opacities. The PERLE code, dedicated to the calculation of linear perturbations of unsteady flows, is then modified to take into account the radiative energy transport, using the hypothesis of the new theoretical model. In the second part of this work, a study of the stability of double ablation fronts structures is carried out. The existing models for the ablation front stability problems are no longer sufficient in this case: their limitations are shown, but, nevertheless, firsts informations on the main ablation front are obtained. Then, the PERLE code is used when the whole double ablation fronts structure is considered. The growth rates for the ablative Rayleigh-Taylor instability are estimated, and show a new shape, unknown up to now. The 2D calculations made with the CHIC code using a more realistic physics confirm these results. The study of the spatial localization of perturbations in the structure shows the relation between the two ablation fronts and the characteristic shape of the growth rates obtained. Finally, the use of such moderate Z ablators is an interesting alternative to reduce the Rayleigh-Taylor instability at the ablation front in direct-drive ICF
Laussy, Fabrice P. "Quantum dynamics of microcavity polaritons". Clermont-Ferrand 2, 2005. http://www.theses.fr/2005CLF22569.
Texto completoAuger, Jérôme. "Mise au point et développement d’un procédé d'aide à la déconstruction des ouvrages en béton armé". Toulouse, INSA, 2009. http://eprint.insa-toulouse.fr/archive/00000339/.
Texto completoThe objective of the work is to propose an alternative to the traditional techniques of deconstruction of massive structures made of reinforced concrete. The purpose is to attack the structures by two pathologies known to be extremely noxious to reinforced concrete: sulfate attack and chloride corrosion. Transport and reaction phenomena (with the cement matrix and the reinforcement bars) are accelerated by the application of an external electricla field. First a review of the literature on the agressive species (sulfate and chloride) allowed to develop accelerated tests. The transfer of ionic species during the phase of migration was studied by numerical modelling. A scenario of attack, tried on different body sizes, was then proposed from the results of different experimental campaigns on accelerated tests
Rose, Dietmar [Verfasser] y Christian [Akademischer Betreuer] Arning. "Prävalenz der obstruktiven Schlafapnoe bei Patienten mit transitorisch ischämischer Attacke und nicht behinderndem Schlaganfall / Dietmar Rose. Betreuer: Christian Arning". Hamburg : Staats- und Universitätsbibliothek Hamburg, 2015. http://d-nb.info/1067559841/34.
Texto completoVizireanu, Darius. "Conception optimale d’une génératrice synchrone à flux axial et aimants permanents pour une éolienne de 5MW en attaque directe". Ecole Centrale de Lille, 2007. http://www.theses.fr/2007ECLI0009.
Texto completoEncouraged by the economical (decentralization of energy production) and political context (Kyoto Protocol, Buenos Aires Conference, EOLE 2010 Program), the wind energy market meets a continuous growth. Jeumont Industries, an industrial partner of this research study, has developed during the previous decade a direct drive wind generator using an original axial flux permanent magnet synchronous generator. During last decades, important technological advance was noticed in different research areas, as permanent magnets and power semiconductors. Taking into consideration these evolutions, the goal of this study is to investigate the possibility to increase the power of a direct drive wind generator using Jeumont technology. The study is based on the development of multi-physical, multi-level and multi-scale model, which properly combines finite element analysis, dynamical simulation and analytical models. The use of the numerical tools allowed finding the system configuration which better corresponds to the imposed quality criteria: an odd phase number polyphased structure having uniform distribution, which allows easier winding technique, as concentrated one. Different possible configurations of chosen structure are analytically determined, numerically analyzed and ranked. The best ones are optimized and the designer’s final option depends on the compromise to be done between the economical aspects and performances of the system
Saget, Patrick. "Les attaques de panique : therapies comportementales et cognitives". Aix-Marseille 2, 1990. http://www.theses.fr/1990AIX20960.
Texto completoQuéloz, Dimitry. "De la manoeuvre napoléonienne à l'offensive à outrance : la tactique générale de l'armée française, 1871-1914 /". Paris : Institut de stratégie comparée : Économica, 2009. http://catalogue.bnf.fr/ark:/12148/cb414727156.
Texto completoMailliet, Corentin. "Etude expérimentale et numérique du stade fortement non-linéaire de l'Instabilité de Rayleigh-Taylor au front d'ablation en attaque directe". Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0288/document.
Texto completoExperimental and numerical study of the non-linear stage of the ablative Rayleigh-Taylor instability in direct drive
Le, Galudec Olivier. "Étude de la diffusivité turbulente au sein d'un écoulement à très haut régime en attaque longitudinale d'un faisceau de tubes". Nancy 1, 1991. http://www.theses.fr/1991NAN10404.
Texto completoLutz, Katrin [Verfasser]. "Der Knöchel-Arm-Index als prognostischer Faktor für ein erhöhtes kardiovaskuläres Risiko nach ischämischem Schlaganfall und transienter ischämischer Attacke / Katrin Lutz". Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2011. http://d-nb.info/1026069165/34.
Texto completoCOUETOUX, DU TERTRE ANNE. "Le role des recepteurs aux benzodiazepines dans les attaques de panique induites par la cholecystokinine". Nantes, 1992. http://www.theses.fr/1992NANT103M.
Texto completoGruschka, Nils. "Schutz von Web Services durch erweiterte und effiziente Nachrichtenvalidierung /". Göttingen : Cuvillier, 2008. http://d-nb.info/990464792/04.
Texto completoJahnke, Marko. "Graph-based automated denial-of-service attack response". Waabs GCA-Verl, 2009. http://d-nb.info/999846620/04.
Texto completoYammine, Alexandre. "Modélisation multi-échelle et étude expérimentale de l’endommagement par attaque sulfatique interne dans les matériaux cimentaires : application aux bétons ordinaires et recyclés". Thesis, Nantes, 2020. https://archive.bu.univ-nantes.fr/pollux/show/show?id=956cb31b-35ab-4203-9f88-90547f0fd3ba.
Texto completoConcrete deterioration due to internal sulphate attack (RSI) also known by delayed ettringite formation (DEF) is an expansive damage of concrete that develops as a result of exposure to elevated temperatures. Aggregates nature impact the development of DEF particularly when they provide chemical compounds that promote delayed ettringite formation. The use of recycled concrete aggregates (RCA) an alternative to quarry aggregates with the aim of reducing environmental impact of concrete production is a major current issue that faces technical difficulties including the decrease in the durability of concrete. Therefore, this thesis proposes an experimental study of mortars and concrete made form RCA to investigate their ability to develop DEF. Experimental results show a low risk in RCAbased concretes and mortars compared to siliceous aggregate based. A physico-chemical model applied to mortars show higher delayed ettringite content in RCA based mortars but lower expansion volume in comparison to standardized silicious sand based mortars. Finally, a multi-scale poromechanical model which features a description of damage by progression of microcracking is proposed. A comparison of the model to experimental data on mortars formulated with CEM I cement is carried out
Le, Thanh-Ha. "Analyses et mesures avancées du rayonnement électromagnétique d'un circuit intégré". Grenoble INPG, 2007. http://www.theses.fr/2007INPG0097.
Texto completoAnalyze two methods: DifferentiaI Power Analysis (DP A) and the Correlation Power Analysis (CP A). The attacks DPA and CPA are based on a power consumption mode!. However, because of the complexity of the circuit, the fact of having a rigorous model is not realistic. We proposed a new method, Partitioning Power Analysis (PP A), which makes it possible to improve the performance of an attack without a precis consumption mode!. Side channel attacks depend closely on the quality of measured signaIs. The performance of an attack can be definitely reduced if the noise level is too high or if the signaIs are not weIl aligned. We proposed solutions based on signal processing techniques to reduce the noise and the effects generated by the signal misalignment. These solutions make it possible to improve the attack effectiveness
Forler, Nina. "A multinuclear solid-state NMR approach to the weathering of model phosphate glasses". Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10003/document.
Texto completoThe present manuscript focuses on the investigation of phosphate glass weathering by multinuclear solid-state magnetic resonance. Weathering, that is aqueous attack and aging of the phosphate glass under humid atmosphere, becomes important in application domains where high resistance against aqueous attack is an essential property. In particular, this is the case for phosphate glass matrices for the immobilization of nuclear waste. In the frame of this work, binary (Na2O-P2O5) and ternary (Na2O-Al2O3-P2O5) model glass systems are considered. The aim is to obtain further insight into fundamental processes and structural changes that are taking place upon weathering attack on the glass. Solid-state nuclear magnetic resonance is used as the main tool for structural characterization. 1H, 27Al, 31P and 17O are employed as probe nuclei. A number of one- and two-dimensional techniques allows for insight into the glass structure on the low and intermediate range. The interpretation of 17O NMR data is accompanied by a complementary approach. Therefore, the reliability of calculated 17O NMR parameters of protonated crystalline phosphate phases has been validated for the first time. Relationships between 17O NMR parameters and the structural environment of the nucleus could be drawn. Those relationships prove to be helpful for the characterization of oxygen environments emerging in weathered NaPO3 glass based on the chemical shift (δCS, δiso) and the quadrupolar parameters (CQ, ηQ)
Almeida, Braga Daniel de. "Cryptography in the wild : the security of cryptographic implementations". Thesis, Rennes 1, 2022. http://www.theses.fr/2022REN1S067.
Texto completoSide-channel attacks are daunting for cryptographic implementations. Despite past attacks, and the proliferation of verification tools, these attacks still affect many implementations. In this manuscript, we address two aspects of this problem, centered around attack and defense. We unveil several microarchitectural side-channel attacks on implementations of PAKE protocols. In particular, we exposed attacks on Dragonfly, used in the new Wi-Fi standard WPA3, and SRP, deployed in many software such as ProtonMail or Apple HomeKit. We also explored the lack of use by developers of tools to detect such attacks. We questioned developers from various cryptographic projects to identify the origin of this lack. From their answers, we issued recommendations. Finally, in order to stop the spiral of attack-patch on Dragonfly implementations, we provide a formally verified implementation of the cryptographic layer of the protocol, whose execution is secret-independent
El, Hachem Ibrahim Rana. "Etude multi-critères de la dégradation des matériaux cimentaires par l'attaque sulfatique externe". Ecole centrale de Nantes, 2010. http://www.theses.fr/2010ECDN0027.
Texto completoDurability became an important criterion to take into account when designing concrete structures. Particularly those built in aggressive aqueous media and subjected to chemical attacks such as sulphates, which are known for their destructive ability on cementitious materials. The objective of this work is to establish a representative test for the field conditions and to propose a relevant study to evaluate the effect of these parameters on the performance of cementitious materials subjected to an external sulphate attack (ESA). In this frame, we focused on the exposure’s conditions like the sulphate concentration of the surrounding solution, the exposure time and pre-conditioning, and we will study the parameters related to the material properties such as the type of cement, the properties of the cement matrix, the curing conditions and the mineral additions. The different measures and analyses (SEM, TGA, Porosimetry) show that gypsum has a destructive and expansive character as well as ettringite. The saturation degree has also an important influence on the kinetics and on the degradation scenario. In order to understand the degradation mechanism and analyse the behaviour of the material throughout the attack, we propose the numerical modelling of the phenomenon. We propose an improvement for Tixier & Mobasher model on the damage level. This model is then implemented in Comsol Multiphysics’, finite element software to follow the propagation of the concentration and degradation fronts. These numerical results on sulphate diffusion and expansive product formation are promising
Dubuy, Mélanie Mouton Jean-Denis. "La "guerre préventive" et l'évolution du droit international public". S. l. : S. n, 2008. http://cyberdoc.univ-nancy2.fr.
Texto completoDollenberg, Aurora [Verfasser], Falk [Akademischer Betreuer] Hoffmann y Helge [Akademischer Betreuer] Müller. "Prävalenz und Einflussfaktoren der chronischen posttraumatischen Belastungsstörung bei Patienten mit Herzinfarkt, transitorischer ischämischer Attacke (TIA) und Schlaganfall / Aurora Dollenberg ; Falk Hoffmann, Helge Müller". Oldenburg : BIS der Universität Oldenburg, 2020. http://d-nb.info/1218685700/34.
Texto completoPereira, Fernando. "Production d'acide phosphorique par attaque chlorhydrique de minerais phosphatés avec réduction des nuisances environnementales et récupération des terres rares en tant que sous-produits". Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2003. http://tel.archives-ouvertes.fr/tel-00802984.
Texto completoMINOUFLET, LAURENT FLORENCE. "Etude de la croissance de films formes par attaque oxydante d'un metal. Application a la passivation du fer et a la chromatation du zinc". Paris 6, 1997. http://www.theses.fr/1997PA066136.
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