Дисертації з теми "Fonction de variance"
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Mint, El Mouvid Mariem. "Sur l'estimateur linéaire local de la fonction de répartition conditionnelle." Montpellier 2, 2000. http://www.theses.fr/2000MON20162.
Kokonendji, Célestin Clotaire. "Familles exponentielles naturelles réelles de fonction variance en R Q/ par Célestin Clotaire Kokonendji." Toulouse 3, 1993. http://www.theses.fr/1993TOU30092.
Nisa, Khoirin. "On multivariate dispersion analysis." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2025.
This thesis examines the multivariate dispersion of normal stable Tweedie (NST) models. Three generalize variance estimators of some NST models are discussed. Then within the framework of natural exponential family, two characterizations of normal Poisson model, which is a special case of NST models with discrete component, are shown : first by variance function and then by generalized variance function. The latter provides a solution to a particular Monge-Ampere equation problem. Finally, to illustrate the application of generalized variance of normal stable Tweedie models, examples from real data are provided
Kokonendji, Célestin. "Contributions théoriques et pratiques aux familles exponentielles." Habilitation à diriger des recherches, Université de Pau et des Pays de l'Adour, 2004. http://tel.archives-ouvertes.fr/tel-00007794.
Moypemna, sembona Cyrille clovis. "Caractérisations des modèles multivariés de stables-Tweedie multiples." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2071/document.
In the framework of natural exponential families, this thesis proposes differents characterizations of multivariate multiple stables-Tweedie under "steepness" property. These models appeared in 2014 in the literature were first introduced and described in a restricted form of the normal stables-Tweedie models before extensions to multiple cases. They are composed by a fixed univariate stable-Tweedie variable having a positive domain, and the remaining random variables given the fixed one are reals independent stables-Tweedie variables, possibly different, with the same dispersion parameter equal to the fixed component. The corresponding normal stables-Tweedie models have a fixed univariate stable-Tweedie and all the others are reals Gaussian variables. Through special cases such that normal, Poisson, gamma, inverse Gaussian, multiple stables-Tweedie models are very common in applied probability and statistical studies. We first characterized the normal stable-Tweedie through their variances function or covariance matrices expressed in terms of their means vector. According to the power variance parameter values, the nature of polynomials associated with these models is deduced with the properties of the quasi orthogonal, Levy-Sheffer systems, and polynomial recurrence relations. Then, these results allowed us to characterize by function variance the largest class of multiple stables-Tweedie. Which led to a new classification, which makes more understandable the family. Finally, a extension characterization of normal stable-Tweedie by generalized variance function or determinant of variance function have been established via their infinite divisibility property and through the corresponding Monge-Ampere equations. Expressed as product of the components of the mean vector with multiple powers parameters reals, the characterization of all multivariate multiple stable- Tweedie models by generalized variance function remains an open problem
Cuenin, Johann. "Sur les modèles Tweedie multivariés." Thesis, Besançon, 2016. http://www.theses.fr/2016BESA2026/document.
After a reminder of the natural exponential families framework and the univariate Tweedie distributions, we build two multivariate extension of the latter. A first construction, called Tweedie random vector, gives a multivariate Tweedie distribution parametrized by a mean vector and a dispersion matrix. We show that the correlations between the margins can be controlled and vary between -1 and 1. Some properties shared with the well-known Gaussian vector are given. By giving a matrix representation, we can simulate observations of Tweedie random vectors. The second construction establishes the multiple stable Tweedie models. They are vectors of which the first component is Tweedie and the others are independant Tweedie, given the first one, and with dispersion parameter given by an observation of the first component. We give the generalized variance and show that it is a product of powered component of the mean and give an efficient estimator of this parameter. Finally, we can show, with some restrictions, that the generalized variance is a tool which can be used for characterizing the natural exponential families generated by multiple stable Tweedie models
Ho, Xuan Hieu. "On multifractality, Schwarzian derivative and asymptotic variance of whole-plane SLE." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2060/document.
Let f an instance of the whole-plane $\SLE_\kappa$ conformal map from the unit disk D to the slit plane: We know that for certain values of κ, p the derivative moments $\mathbb{E}(\vert f'(z) \vert^p)$ can be written in a closed form, study that has updated a new phase of the integral means spectrum. The goal of this thesis is a study on generalized moments $\frac{\vert f'(z) \vert^p}{\vert f(z) \vert^q}$ : ΒββThis study permit confirm the rich algebraic structure of the whole-plane version of SLE. It will be showed that closed forms of the mixed moments E mixtes $\mathbb{E}\big(\frac{\vert f'(z) \vert^p}{\vert f(z) \vert^q}\big)$ can be obtained on a countable family of parabolas in the moment plane (p, q), by extending the so-called Beliaev–Smirnov equation to this case. We also introduce the generalized integral means spectrum, β(p, q; κ), corresponding to the singular behavior of the mixed moments. The average generalized spectrum of whole-plane SLE takes four possible forms, separated by five phase transition lines in $\R^2$. We also propose a similar approach for the Schwarzian derivative S(f)(z) of SLE maps. Computations on the Beliaev–Smirnov equation of a certain general form of moment lead to an explicit formula of $\mathbb{E}(S(f)(z))$ . We finally study the McMullen asymptotic variance and prove a relation between the infinitesimal growth of the integral mean spectrum and the asymptotic variance in an expectation sense for SLE₂
Daval, Florian. "Identités intégrales et estimations explicites associées pour les fonctions sommatoires liées à la fonction de Möbius et autres fonctions arithmétiques." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1I059/document.
This thesis develops both theoretical and numerical aspects of the explicit theory of prime numbers, mainly from the real analysis viewpoint. Its general framework was initiated by Michel Balazard who obtained integral identities relating the summatory function M of the Möbius coefficients with its logarithmic variant m. We present a systematic mechanism towards such identities, with an integrable function g on [0,1] as parameter. We focus particularly on polynomial g's (as they provide all identities previously published by Balazard), and aim at optimizing some sup norm for the use of the associated identities of integrals. We detail the strategy of numerical explorations, whose ultimate objective is the study of some constants tacitly defined byBalazard. Then we turn to obtaining exact values for sup{|m(x)-M(x)/x| (\log x)^j : x>T } for j=0,1,2 and some T's. Next, we obtain an effective lower bound of an average of |M|, related to a result of Pintz, but with a fundamentally distinct approach using almost no complex analysis. And we then give the analogous result for the summatory function of the Liouville coefficients. Also, we consider the best known non-effective estimates for M(x) and show how to transform them into estimates of xm(x) - M(x) of the same type. The techniques and obtained results dealing with m and M are partially extended to other arithmetical functions
Montagu, Thierry. "Transformées stabilisatrices de variance pour l'estimation de l'intensité du Shot Noise : application à l'estimation du flux neutronique." Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5015.
The Shot noise is a random process that can be used to accurately model the numberof occurrences of physical particles impinging their associated detectors ; this numberis referred to as the intensity of the process. When this number is small, it is possible to individualize the recorded events whose arrival times are modelled thanks to the Poisson process. In the opposite case, the events are no longer discernible (they ”pile up”), but Campbell's theorem - which establishes the cumulants of the Shot Noise - still allows to estimate the intensity of the process. The estimation of the two first cumulants is classically achevied with the empirical mean and the empirical variance. It is noted in this work, that the variances of theses two estimators and their corresponding estimators of the Shot Noise intensity are functions of their respective means. This property ofheter heteroscedasticity being observed both in theory and practice, an approach by variance stabilizing transforms is proposed using the "Delta method". These are calculated as well as their bias, and their corresponding inverse transforms. Their asymptotic properties are verified thanks to numerical simulations. In the applicative context of neutron flux measurements, which rely on the estimation of the first two cumulants of the Shot Noise and which also have the purpose of estimating the intensity of this random process,variance stabilizing transforms are specifically established as well as their biases and their inverse transforms. They are finally combined with an adaptive Kalman filter in order to denoise the neutron flux measurements. Numerical simulations are carried out to assessfiltering performances. Denoising of real signals is also performed
Maingot, Stéphane. "Multitype et applications holomorphes propres." Rouen, 1989. http://www.theses.fr/1989ROUES010.
Ech-Cherif, El Kettani Mustapha. "Caractérisation des fonctions C. 29**(8) dont la trace est C. 29**(8) pour un morphisme fini." Nancy 1, 1987. http://www.theses.fr/1987NAN10073.
Chauvet, Guillaume. "Méthodes de Bootstrap en population finie." Phd thesis, Rennes 2, 2007. http://tel.archives-ouvertes.fr/tel-00267689.
Hamza, Marwa. "Caractérisations des familles exponentielles naturelles cubiques : étude des lois Beta généralisées et de certaines lois de Kummer." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0036/document.
This thesis has two different parts. In the first part we are interested in the real cubic natural exponential families such that their variance function is a polynomial of degree less than or equal to 3. We give three characterizations of such families using a Bayesian approach. One of these characterizations is based on a differential equation verified by the cumulant function. In a second part we study in depth the independence property of the type “Matsumoto-Yor” that was developed by Koudou and Vallois. This property involves the Kummer distribution of type 2 and the generalized beta ones. Using the conditioning and the rejection method, we give almost sure realization of these distributions. We characterize the family of Kummer distribution of type 2 with an algebraic equation involving the gamma ones. We proceed similarly with the generalized beta distributions
Mora, Marianne. "Sur la geometrie differentielle en statistique : sur la convergence des suites de fonctions variance des familles exponentielles naturelles." Toulouse 3, 1988. http://www.theses.fr/1988TOU30044.
Mora, Marianne. "Familles exponentielles naturelles et fonctions variances." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37599744s.
Thiéry, Christophe. "Itération sur les politiques optimiste et apprentissage du jeu de Tetris." Thesis, Nancy 1, 2010. http://www.theses.fr/2010NAN10128/document.
This thesis studies policy iteration methods with linear approximation of the value function for large state space problems in the reinforcement learning context. We first introduce a unified algorithm that generalizes the main stochastic optimal control methods. We show the convergence of this unified algorithm to the optimal value function in the tabular case, and a performance bound in the approximate case when the value function is estimated. We then extend the literature of second-order linear approximation algorithms by proposing a generalization of Least-Squares Policy Iteration (LSPI) (Lagoudakis and Parr, 2003). Our new algorithm, Least-Squares [lambda] Policy Iteration (LS[lambda]PI), adds to LSPI an idea of [lambda]-Policy Iteration (Bertsekas and Ioffe, 1996): the damped (or optimistic) evaluation of the value function, which allows to reduce the variance of the estimation to improve the sampling efficiency. Thus, LS[lambda]PI offers a bias-variance trade-off that may improve the estimation of the value function and the performance of the policy obtained. In a second part, we study in depth the game of Tetris, a benchmark application that several works from the literature attempt to solve. Tetris is a difficult problem because of its structure and its large state space. We provide the first full review of the literature that includes reinforcement learning works, evolutionary methods that directly explore the policy space and handwritten controllers. We observe that reinforcement learning is less successful on this problem than direct policy search approaches such as the cross-entropy method (Szita et Lorincz, 2006). We finally show how we built a controller that outperforms the previously known best controllers, and shortly discuss how it allowed us to win the Tetris event of the 2008 Reinforcement Learning Competition
Thiery, Christophe. "Itération sur les Politiques Optimiste et Apprentissage du Jeu de Tetris." Phd thesis, Université Henri Poincaré - Nancy I, 2010. http://tel.archives-ouvertes.fr/tel-00550081.
Hamza, Marwa. "Caractérisations des familles exponentielles naturelles cubiques : étude des lois Beta généralisées et de certaines lois de Kummer." Electronic Thesis or Diss., Université de Lorraine, 2015. http://www.theses.fr/2015LORR0036.
This thesis has two different parts. In the first part we are interested in the real cubic natural exponential families such that their variance function is a polynomial of degree less than or equal to 3. We give three characterizations of such families using a Bayesian approach. One of these characterizations is based on a differential equation verified by the cumulant function. In a second part we study in depth the independence property of the type “Matsumoto-Yor” that was developed by Koudou and Vallois. This property involves the Kummer distribution of type 2 and the generalized beta ones. Using the conditioning and the rejection method, we give almost sure realization of these distributions. We characterize the family of Kummer distribution of type 2 with an algebraic equation involving the gamma ones. We proceed similarly with the generalized beta distributions
Yamb, Elie. "Mésalignement et dynamique de convergence du taux de change réel en zone CFA." Phd thesis, Université Panthéon-Sorbonne - Paris I, 2007. http://tel.archives-ouvertes.fr/tel-00326328.
Mietton, Flore. "Localisation et fonction du variant d'histone macroh2a." Phd thesis, Grenoble 1, 2007. http://www.theses.fr/2007GRE10180.
MacroH2A (mH2A) is an unusual histone variant which consists of a histone-like domain and a non-histone region (NHR). Immunofluorescence data suggested that macroH2A is accumulated at the inactive X chromosome. Ln this work we have used chromatin immunoprecipitation (ChIP) analysis, combined with human and mouse genome-wide array hybridization (ChIP on CHIP), to investigate the association of mH2A with the inactive X chromosome. The mH2A enrichment is moderate, suggesting a non-essential mH2A participation to the X inactivation We describe a novel function of mH2A, namely its involvement in DNA repair. Ln vivo mH2A 1 nucleosomes are found associated with P ARP-1 and in vitro experiments demonstrate that the NHR domain of mH2A 1 is essential for this interaction. The siRNA suppression of the expression of mH2A 1 affects cell survival after oxidative DNA damage and inhibition of P ARP-I enzymatic activity abolishes this effect. The absence of mH2A 1 results in overactivation of PARP-1 and compromises severely DNA repair after oxidative damage. Rescue experiments with silent resistant mutants of mH2A 1 evidence that the NHR, but not the H2A-like domain of mH2A l, is required for the efficient repair of ON A. These data show that the involvement of mH2A 1 in the repair of DNA is realized through a P ARP-l repair pathway
Mietton, Flore. "Localisation et fonction du variant d'histone macroH2A." Phd thesis, Université Joseph Fourier (Grenoble), 2007. http://tel.archives-ouvertes.fr/tel-00183255.
Par immunofluorescence, cette protéine est retrouvée accumulée sur le territoire du chromosome X inactif (Xi) chez les mammifères femelles. Néanmoins, cette association préférentielle pourrait simplement refléter la forte concentration en nucléosomes de cette région. Pour aborder le rôle de macroH2A dans le phénomène de l'inactivation du chromosome X, notre principale approche a consisté en des expériences de «ChIP-on-CHIP» sur de la chromatine native. Nos résultats montrent un enrichissement global et modeste de macroH2A sur le chromosome X femelle, excepté sur la plupart des gènes échappant à l'inactivation.
Nous avons souhaité nous intéresser également au rôle potentiel de macroH2A dans le mécanisme de réparation de l'ADN. En effet, il a été montré que le domaine macro est capable de lier l'ADP-ribose, un nucléotide déterminant dans de nombreux processus biologiques tels que la transcription ou la réparation. Plusieurs expériences nous ont permis de démontrer que les nucléosomes macroH2A sont associés in vivo à l'enzyme PARP-1, protéine clef de la réparation des cassures simple brin de l'ADN. La PARP-1 associée au nucléosome variant est inactive, et le traitement par H2O2 va induire son relâchement et son activation. L'absence de macroH2A conduit à une sur-activation de PARP-1, ce qui compromet sévèrement la réparation de l'ADN endommagé.
Mammass, Driss. "Sur le theoreme de polya-carlson concernant les series de puissances a coefficients entiers dans c**(n)." Toulouse 3, 1988. http://www.theses.fr/1988TOU30097.
Bennegueouche, Souad. "Invariance de certaines inegalites polynomicales harmoniques par rapport aux applications holomorphes." Toulouse 3, 1989. http://www.theses.fr/1989TOU30013.
Hickel, Michel. "Quelques résultats de division dans l'algèbre A∞ (Ω)". Bordeaux 1, 1986. http://www.theses.fr/1986BOR10550.
Malouche, Dhafer. "Familles exponentielles associees a des fonctions pick et classification fonctions variances p(m)/(cm + d)." Toulouse 3, 1997. http://www.theses.fr/1997TOU30192.
Thiéry, Christophe. "Itération sur les politiques optimiste et apprentissage du jeu de Tetris." Electronic Thesis or Diss., Nancy 1, 2010. http://www.theses.fr/2010NAN10128.
This thesis studies policy iteration methods with linear approximation of the value function for large state space problems in the reinforcement learning context. We first introduce a unified algorithm that generalizes the main stochastic optimal control methods. We show the convergence of this unified algorithm to the optimal value function in the tabular case, and a performance bound in the approximate case when the value function is estimated. We then extend the literature of second-order linear approximation algorithms by proposing a generalization of Least-Squares Policy Iteration (LSPI) (Lagoudakis and Parr, 2003). Our new algorithm, Least-Squares [lambda] Policy Iteration (LS[lambda]PI), adds to LSPI an idea of [lambda]-Policy Iteration (Bertsekas and Ioffe, 1996): the damped (or optimistic) evaluation of the value function, which allows to reduce the variance of the estimation to improve the sampling efficiency. Thus, LS[lambda]PI offers a bias-variance trade-off that may improve the estimation of the value function and the performance of the policy obtained. In a second part, we study in depth the game of Tetris, a benchmark application that several works from the literature attempt to solve. Tetris is a difficult problem because of its structure and its large state space. We provide the first full review of the literature that includes reinforcement learning works, evolutionary methods that directly explore the policy space and handwritten controllers. We observe that reinforcement learning is less successful on this problem than direct policy search approaches such as the cross-entropy method (Szita et Lorincz, 2006). We finally show how we built a controller that outperforms the previously known best controllers, and shortly discuss how it allowed us to win the Tetris event of the 2008 Reinforcement Learning Competition
Hassairi, Abdelhamid. "Classification des familles exponentielles naturelles dans IRd de variance cubique du type Mora." Toulouse 3, 1994. http://www.theses.fr/1994TOU30107.
BONNEAU, PIERRE. "Solutions integrales de l'operateur de cauchy-riemann dans les domaines pseudoconvexes : applications a des problemes de division." Toulouse 3, 1987. http://www.theses.fr/1987TOU30034.
Zeriahi, Ahmed. "Fonctions plurisousharmoniques extremales, approximation et croissance des fonctions holomorphes sur des ensembles algebriques." Toulouse 3, 1986. http://www.theses.fr/1986TOU30105.
Marie-Jeanne, Frédéric. "Propriétés arithmétiques de la fonction d’Euler et généralisations." Nancy 1, 1998. http://www.theses.fr/1998NAN10296.
Goutte-Gattat, Damien. "Etude des fonctions mitotiques du domaine amino-terminal de CENP-A." Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENV079/document.
The histone variant CENP-A is the epigenetic factor responsible for centromere deter- mination. It allows the recruitment of a handful of centromeric proteins, and thus acts as the primary foundation for the kinetochore. It comprises an unstructured amino-terminal domain to which no precise function has yet been assigned, although it is established in some species that the mere presence of that domain is required for proper centromere func- tion and thus successful completion of mitosis. We have established several human cell lines stably expressing GFP-tagged CENP-A constructs, allowing us to perform pseudoge- netic experiments by siRNA-mediated silencing of the endogenous CENP-A. Our results show a dramatic increase of mitotic defects and plurinuclear cells when cells express only the globular domain of CENP-A; this is in accordance with the litterature and confirms the importance of the amino-terminal tail. More importantly, a similar increase of mitotic defects is observed when cells express a full-length, but non-phosphatable, CENP-A. Our results show the involvement of the phosphatable serine 7 of CENP-A in the successful completion of mitosis, and may suggest that the role of the whole amino-terminal tail of CENP-A could be reduced to this single phosphorylation event
Tela, Nlenvo Lucien. "Formes impaires et un problème de rigidité infinitésimale pour la quadrique complexe de dimension 3." Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10231.
ROQUEPLO, GIMENEZ ANNE-PAULE. "Structure et fonction de l'angiotensionogene humain : etude des variants naturels et des variants obtenus par mutagenese dirigee." Paris 6, 1999. http://www.theses.fr/1999PA066440.
SIXTO, TAPIA ARTUR, and M. GOLDBERG. "Structure-fonction des variants m et z de l'alpha-1-antitrypsine humaine." Paris 7, 1994. http://www.theses.fr/1994PA077304.
Boulard, Matthieu. "Variants d'histones H2BFWT et macroH2A1: de la structure à la fonction épigénétique." Phd thesis, Grenoble 1, 2007. http://www.theses.fr/2007GRE10149.
In addition to conventional histones, non-allelic variants are also expressed in low amount in eukaryotic cells. Recent data have revealed that histone variants assume roles in various processes within the cell including DNA repair, chromosome segregation and transcriptional control. The aim of my study was to highlight some biological functions harbored by histone variants. My investigations focused on two variants: the uncharacterized H2BFWT, which plays a role in human spermatogenesis and macroH2A1, which has an unclear function in transcriptional silencing. We show that, despite its huge divergence with H2B, the presence of H2BFWT does not affect the overall structure of the nucleosome. Importantly, in contrast to somatic H2B, H2BFWT was unable to recruit chromosome condensation factors and to participate in the assembly of mitotic chromosomes. This difference towards chromosome assembly suggests that H2BFWT might be involved in chromatin architecture. In order to bring new insights about macroH2A1 function in vivo we have disrupted macroH2A1 expression in mice by gene targeting. Many studies have been addressed macroH2A1 function, however its biological role remains unclear. MacroH2A1 is three times bigger than H2A and carries a C-terminal extension of unknown function. Initially macroH2A1 had been reported to be predominantly located on the inactive X chromosome in female. The biological significance of this enrichment is totally unknown. In vitro, the presence of macroH2A1 interferes with transcription. Recent studies show that methylated DNA sequences including imprinted genes and retrotransposons are enriched in macroH2A1. It has been reported that macroH2A recruitment on retrotransposons is mediated by DNA methylation, which is absolutely required for their silencing. We hypothesized that methylation of CpG dinucleotides in retrotransposons might achieve transcriptional repression through recruitment of macroH2A1. The study of the mice phenotype shows that contrary to the current view, macroH2A1 is not able on its own, to repress transcription of repetitive sequences including transposon in vivo. Anatomopathological examinations reveal that macroH2A1 could be involved in fatty acid metabolism
Boulard, Matthieu. "Variants d'histones H2BFWT et macroH2A1: de la structure à la fonction épigénétique." Phd thesis, Université Joseph Fourier (Grenoble), 2007. http://tel.archives-ouvertes.fr/tel-00175842.
Nous avons montré que malgré sa grande divergence avec H2B, l'incorporation de H2BFWT ne modifie pas la structure globale du nucléosome. Néanmoins, contrairement à l'histone somatique H2B, H2BFWT n'a pas la capacité de recruter les facteurs d'assemblage du chromosome et n'est pas requis pour la condensation du chromosome mitotique. Cette différence de comportement vis-à-vis de l'assemblage des chromosomes suggère que H2BFWT pourrait être impliqué dans l'architecture de structure d'ordre supérieur de la chromatine.
Dans le but d'élucider le rôle biologique de macroH2A1 in vivo, nous avons généré une lignée de souris invalidées pour macroH2A1.
Malgré l'abondance des investigations portant sur macroH2A1, sa fonction reste inconnue. MacroH2A1 a la particularité d'être trois fois plus grand que H2A, il comporte ainsi une extension C-terminale de fonction inconnue. Initialement macroH2A1 avait été décrit comme principalement localisé sur le chromosome X inactif. La signification biologique de cet enrichissement n'est pas comprise. In vitro, la présence de macroH2A1 interfère avec la transcription. De récentes études ont montré que certaines séquences d'ADN méthylées, incluant les gènes soumis à l'empreinte et les rétrotransposons sont enrichies en nucléosomes contenant macroH2A1. Il a également été démontré que c'est la méthylation de l'ADN, nécessaire pour la répression transcriptionnelle, qui permet le recrutement de macroH2A1 sur les rétrotransposons. Nous émettons l'hypothèse que la méthylation de l'ADN aboutirait à la répression des rétrotransposons via le recrutement de macroH2A1.
L'étude du phénotype des souris déficientes en macroH2A1 permet de conclure que contrairement au consensus actuel, macroH2A1 n'est pas nécessaire pour réprimer la transcription des séquences répétées incluant les rétrotransposons.
Les examens anatomopathologiques suggèrent que macroH2A1 pourrait être impliqué dans la régulation du métabolisme des acides gras.
Daras, Nicolas. "Domaine de convergence d'une transformation de la suite des sommes partielles d'une fonction holomorphe et application aux approximants de type Padé." Lille 1, 1988. http://www.theses.fr/1988LIL10030.
Roton, Anne-Gwénaëlle de. "Généralisation du critère de Beurling-Nyman à la classe de Selberg." Bordeaux 1, 2003. http://www.theses.fr/2003BOR12768.
La, Morlière Jacques Rochette. "Identification d'hemoglobines hyperaffines pour l'oxygene : techniques d'etudes et relation structure fonction." Paris 7, 1987. http://www.theses.fr/1987PA077153.
Turcotte, Jean-Philippe. "Estimation par densités prédictives." Mémoire, Université de Sherbrooke, 2013. http://hdl.handle.net/11143/6606.
Ould, Madi-Berthelemy Pauline. "Caractérisation des fonctions génomiques de variants du récepteur des androgènes dans le cancer de la prostate." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAJ112.
The androgen receptor (AR) is the main therapeutic target in metastatic prostate cancer (PCa). Although this therapy is initially effective, the effects are transient. Many mechanisms can explain PCa progression toward castration resistance including abnormalities in the AR. Recent data have shown that constitutive AR (e.g AR-Q641X and AR-V7), which have lost the ligand binding domain, were associated with the induction of mesenchymal marker expression. The study of N-cadherin regulation highlighted that while both constitutive AR and wild type AR bound to response elements located in the encoding gene, only the AR variants were associated with an increase of H4 acetylation, a positive transcription mark. RNA-seq revealed that their expression was also correlated to specific sets of genes regulation, including transcription factors and genes involved in migration, AR regulation, and therapeutic resistance.Concerning AR-T576A, which hold a missense mutation, data revealed a less conserved consensus sequence for the wild type AR than for this mutant and highlighted the importance of the 11th nucleotide of the response element for AR recruitment to DNA. Plus, this mutation seemed to impair AR transcriptome. This work highlights the distinct AR variants’ behavior and helps to understand their mode of action by depicting their transcriptional landscapes
ABDALLA, MOHAMED. "Quelques problemes en geometrie analytique de dimension infinie." Paris 6, 1986. http://www.theses.fr/1986PA066441.
Hérard, Jean-Marc. "Modélisation et calcul d'écoulements turbulents isothermes de gaz à densité variable." Toulouse, INPT, 1986. http://www.theses.fr/1986INPT080H.
Dalkara, Defne. "Etude des fonctions du domaine amino-terminal de CENP-A pendant la mitose." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV001.
The histone variant CENP-A epigenetically marks the centromere. The presence of CENP-A at the centromeres allows the recruitment of centromeric proteins that constitute the platform for functional kinetochores.In human cells, the NH2-terminus of CENP-A and its phosphorylation at serine 7 in mitosis has been reported to be crucial for the progression of mitosis. However, no phosphorylation of CENP-A in other metazoan species has been described. Here, we show that the NH2-terminus of CENP-A, but not its primary sequence, is required for mitosis in mouse embryonic cells (MEFs). Our data show that the mitotic defects resulting from the depletion of the endogenous CENP-A can be rescued when MEFs expressing a GFP- CENP-A mutant where the NH2-terminus of CENP-A was swapped with the phosphorylatable tail of conventional histone H3. Conversely, no rescue was observed when the two phosphorylatable serines in the H3 tail mutant were replaced with alanines. Furthermore, a non-phosphorylatable fusion mutant of CENP-A where all seven serines in the amino-tail were replaced with alanines, was also unable to rescue the mitotic phenotype of CENP-A depleted cells.We also identified that the first three serines of the tail of CENP-A as potential sites for phosphorylation. Additionally, we were able to link the phosphorylation of CENP-A amino-tail to the proper localization of the key centromeric protein CENP-C. These results suggest that mitotic CENP-A phosphorylation is a potentially common event in metazoans essential for mitotic progression.In the second par of this work we wanted to unambiguously tie the NH2-terminus function of CENP-A to mitosis. To achieve this, we wanted to remove the CENP-A amino-tail only during mitosis and we devised a new method called the Hara-kiri approach in order to answer the above question in human cells. The removal of the NH2-terminal domain of CENP-A using the Hara-kiri approach at the onset of mitosis led to increased mitotic defects in cells. Taken collectively these data show that the CENP-A NH2- terminus is required during mitosis to assure proper cell division
Roulland, Yohan. "Fonctions des extrémités flexibles de l’ADN du nucléosome CENP-A dans l'organisation de la chromatine centromérique." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAV087/document.
CENP-A is a histone variant, which replaces histone H3 at centromeres and confers unique properties to centromeric chromatin. The crystal structure and MNase digestion of CENP-A nucleosome suggests flexible nucleosomal DNA ends but their dynamics in solution remains elusive and their implication in centromere function is unknown. Using electron cryo-microscopy we determined the dynamic solution properties of the CENP-A nucleosome. Our biochemical, proteomic and genetic data reveal that the high flexibility of the DNA ends impairs histone H1 binding to the CENP-A nucleosome. Substituting the 2-turn aN-helix of CENP-A with the 3-turn N-helix of H3 results in particles able to bind histone H1. In vivo replacement of CENP-A nucleosomes with the same NH3-CENP-A hybrid nucleosomes leads to H1 recruitment, delocalization of kinetochore proteins and significant mitotic and cytokinesis defects. Put together, ourdata reveal that the evolutionarily conserved flexible ends of the CENP-A nucleosomes are essential to ensure the fidelity of the mitotic pathway
La, Higuera Colin de. "Fonctions d'arité variable ou infinie : applications aux systèmes d'équations et aux grammaires d'attributs." Bordeaux 1, 1989. http://www.theses.fr/1989BOR10521.
Nguyên, Viêt Anh. "Problèmes de Lu Qi-Keng, théorie Hp et équation đ." Aix-Marseille 1, 2001. http://www.theses.fr/2001AIX11006.
Mora, Marianne. "Sur la géométrie différentielle en statistique sur la convergence des suites de fonctions variance des familles exponentielles naturelles /." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376166805.
Bara, Gabriela Iuliana. "Estimation d'état des systèmes linéaires à paramètres variants." Vandoeuvre-les-Nancy, INPL, 2001. http://www.theses.fr/2001INPL591N.
Huang, Shi. "L'application des fonctions spline à une variable pour l'étalonnage statique de systèmes de mesure." Thèse, Université du Québec à Trois-Rivières, 1997. http://depot-e.uqtr.ca/4893/1/000631168.pdf.