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Marangoni, Davide. "On Derived de Rham cohomology." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0095.
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La cohomologie de de Rham dérivée a été introduite par Luc Illusie en 1972, suite à ses travaux sur le complexe cotangent. Cette théorie semble avoir été oubliée jusqu’aux travaux récents de Bhatt et Beilinson, qui ont donné diverses applications, notamment en théorie de Hodge p-adique. D’autre part, la cohomologie de Rham dérivée intervient de manière cruciale dans une conjecture de Flach-Morin sur les valeurs spéciales des fonctions zêta des schémas arithmétiques. Dans cette thèse, on se propose d’étudier et de calculer la cohomologie de de Rham dérivée dans certains casThe derived de Rham complex has been introduced by Illusie in 1972. Its definition relies on the notion of cotangent complex. This theory seems to have been forgot until the recents works by Be˘ılinson and Bhatt, who gave several applications, in particular in p-adic Hodge Theory. On the other hand, the derived de Rham cohomology has a crucial role in a conjecture by Flach-Morin about special values of zeta functions for arithmetic schemes. The aim of this thesis is to study and compute the Hodge completed derived de Rham complex in some cases
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MARANGONI, DAVIDE MARIA ALFONSO. "ON DERIVED DE RHAM COHOMOLOGY." Doctoral thesis, Università degli Studi di Milano, 2020. http://hdl.handle.net/2434/757243.
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La coomologia di de Rham derivata é stata introdotta da Luc Illusie nel 1972, in seguito ai suoi lavori sul complesso cotangente. Tale teoria sembra essere stata dimenticata fino ai lavori recenti di Bhatt e Beilinson, i quali ne hanno fornito diverse applicazioni, in particolare nella teoria $p$-adica di
Hodge. D'altra parte, la coomologia di de Rham derivata interviene in maniera cruciale in una congettura di Flach-Morin sui valori speciali della funzione zeta di schemi aritmetici. In questa tesi ci proponiamo di studiare e calcolare la coomologia di de Rham derivata in certi casi.The derived de Rham complex has been introduced by Illusie in 1972 as a natural consequence of the definition of the cotangent complex for a scheme morphism. This theory seems to have been forgot until the recents works by Bhatt and Beilinson, who gave several applications, in particular in $p$-adic Hodge Theory. On the other hand, the derived de Rham cohomology has a crucial role in a conjecture by Flach-Morin about special values of zeta functions for arithmetic schemes. The aim of this thesis is to study and compute the Hodge completed derived de Rham complex in some cases.
La cohomologie de de Rham dérivée a été introduite par Luc Illusie en 1972,suite à ses travaux sur le complexe cotangent. Cette théorie semble avoir été oubliéejusqu’aux travaux récents de Bhatt et Beilinson, qui ont donné diverses applications,notamment en théorie de Hodgep-adique. D’autre part, la cohomologie de Rhamdérivée intervient de manière cruciale dans une conjecture de Flach-Morin sur lesvaleurs spéciales des fonctions zêta des schémas arithmétiques. Dans cette thèse, onse propose d’étudier et de calculer la cohomologie de de Rham dérivée dans certainscas.
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Davis, Christopher (Christopher James). "The overconvergent de Rham-Witt complex." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/50593.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2009.Includes bibliographical references (p. 83-84).
We define the overconvergent de Rham-Witt complex ... for a smooth affine variety over a perfect field in characteristic p. We show that, after tensoring with Q, its cohomology agrees with Monsky-Washnitzer cohomology. If dim C < p, we have an isomorphism integrally. One advantage of our construction is that it does not involve a choice of lift to characteristic zero. To prove that the cohomology groups are the same, we first define a comparison map ... (See Section 4.1 for the notation.) We cover our smooth affine C with affines B each of which is finite, tale over a localization of a polynomial algebra. For these particular affines, we decompose ... into an integral part and a fractional part and then show that the integral part is isomorphic to the Monsky-Washnitzer complex and that the fractional part is acyclic. We deduce our result from a homotopy argument and the fact that our complex is a Zariski sheaf with sheaf cohomology equal to zero in positive degrees. (For the latter, we lift the proof from [4] and include it as an appendix.) We end with two chapters featuring independent results. In the first, we reinterpret several rings from p-adic Hodge theory in such a way that they admit analogues which use big Witt vectors instead of p-typical Witt vectors. In this generalization we check that several familiar properties continue to be valid. In the second, we offer a proof that the Frobenius map on W(...) is not surjective for p > 2.
by Christopher Davis.
Ph.D.
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Silva, Junior Soares da. "Introdução à cohomologia de De Rham." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/55/55135/tde-16112017-101825/.
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Começamos definindo a cohomologia clássica de De Rham e provamos alguns resultados que nos permitem calcular tal cohomologia de algumas variedades diferenciáveis. Com o intuito de provar o Teorema de De Rham, escolhemos fazer a demonstração utilizando a noção de feixes, que se mostra como uma generalização da ideia de cohomologia. Como a cohomologia de De Rham não é a única que se pode definir numa variedade, a questão da unicidade dá origem a teoria axiomática de feixes, que nos dará uma cohomologia para cada feixe dado. Mostraremos que a partir da teoria axiomática de feixes obtemos cohomologias, além das cohomologias clássicas de De Rham, a cohomologia clássica singular e a cohomologia clássica de Cech e mostraremos que essas cohomologias obtidas a partir da noção axiomática são isomorfas as definições clássicas. Concluiremos que se nos restringirmos a apenas variedades diferenciáveis, essas cohomologias são unicamente isomorfas e este será o teorema de De Rham.We begin by defining De Rhams classical cohomology and we prove some results that allow us a calculation of the cohomology of some differentiable manifolds. In order to prove De Rhams Theorem, we chose to make a demonstration using a notion of sheaves, which is a generalization of the idea of cohomology. Since De Rhams cohomology is not a only one that can be made into a variety, the question of unicity gives rise to axiomatic theory of sheaves, which give us a cohomology for each sheaf given. We will show that from the axiomatic theory of sheaves we obtain cohomologies, besides the classical cohomologies of De Rham, a singular classical cohomology and a classical cohomology of Cech and we will show that cohomologies are obtained from the axiomatic notion are classic definitions. We will conclude that if we restrict ourselves to only differentiable manifolds, these cohomologies are uniquely isomorphic and this will be De Rhams theorem.
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Apaza, Nuñez Danny Joel. "El Teorema de De Rham-Saito." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/95679.
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The theorem of De Rham-Saito is a generalization of a lemma due to De Rham [3], which was announced and used in [7] by Kyoji Saito, as noproof of this theorem was available, Le Dung Trang encouraged to Saito to publish the proof that can be seen in [8], which indirectly encourages us to detail the proof in this article for the many applications it has,we highlight the Godbillon-Vey algorithm [4]; in the proof of Theorem classical Frobenius given in [2]; in [6] we see some interesting applications, in the proof of Frobenius theorem with singularities [5]. In [1] we givefull details of the proof given by Moussu and Rolin.El teorema de De Rham-Saito es una generalización de un lema debido a De Rham [3], el cual fue enunciado y usado en [11] por Kyoji Saito, al no haber prueba de este teorema Le Dung Trang anima a Saito a publicar la prueba que puede ser vista en [12], lo cual indirectamente nos motiva a detallarla prueba en este articulo por las muchas aplicaciones que tiene, destacamos el algoritmo de Godbillon-Vey [5]; en la prueba del Teorema de Frobenius clásico dada en [2]; en [8] vemos unas aplicaciones interesantes; en la prueba del Teorema de Frobenius con singularidades [7]; en [1] se detalla la prueba realizada por Moussu y Rolin [10].
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Ewald, Christian-Oliver. "Hochschild homology and de Rham cohomology of stratifolds." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965191931.
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Stacey, Andrew Edgell. "A construction of semi-infinite de Rham cohomology." Thesis, University of Warwick, 2001. http://wrap.warwick.ac.uk/55501/.
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The purpose of this thesis is to describe a construction of semi-infinite de Rham cohomology for infinite dimensional manifolds equipped with the extra structure of a polarisation. We describe the construction for finite dimensions and show how it extends to other cases; in particular the semi-infinite. We then define variations for Hilbert manifolds which allow us to calculate the semi-infinite cohomology of the projective space and the Grassmannians of a polarised Hilbert space. Finally, we consider some of the implications of these results for index theory, in particular for the Witten genus.
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Costeanu, Viorel 1975. "On the 2-typical de Rham-Witt complex." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32242.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 2004.Includes bibliographical references (p. 55).
In this thesis we introduce the 2-typical de Rham-Witt complex for arbitrary commutative, unital rings and log-rings. We describe this complex for the rings Z and Z(2), for the log-ring (Z(2), M) with the canonical log-structure, and we describe its behaviour under polynomial extensions. In an appendix we also describe the p-typical de Rham-Witt complex of (Z(p), M) for p odd.
by Viorel Costeanu.
Ph.D.
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Mendes, Thais Zanutto. "Do cálculo à cohomologia: cohomologia de de Rham." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/55/55135/tde-17072012-144946/.
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Neste trabalho, estudamos a cohomologia de de Rham e métodos para os seus cálculos. Finalizamos com aplicações da cohomologia de de Rham em teoremas da topologiaIn this work we study the de Rham cohomology and methods for its calculations. We close it with applications of the Rham cohomology in theorems from topology
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Munoz, Bertrand Ruben. "Coefficients en cohomologie de De Rham-Witt surconvergente." Thesis, Normandie, 2020. http://www.theses.fr/2020NORMC205.
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Deligne a défini dans les années 70 le complexe de De Rham-Witt, qui permit à Illusie de prouver un théorème de comparaison avec la cohomologie cristalline. Ce résultat fut ensuite étendu par Etesse aux coefficients. En 2004, Bloch démontra que le théorème de comparaison cohomologique étendu aux coefficients d'Etesse possédait une interprétation plus profonde : sous certaines conditions, on obtient en fait une équivalence de catégories entre des cristaux et des connexions de De Rham Witt.Plus récemment, Davis, Langer et Zink ont introduit un complexe de De Rham-Witt surconvergent et démontré des théorèmes de comparaison avec les cohomologies de Monsky-Washnitzer et rigide. Ces derniers furent ensuite étendus aux coefficients par Ertl, qui démontra notamment un quasi-isomorphisme de cohomologie avec les isocristaux surconvergents.On peut alors légitimement se demander si les résultats de Bloch possèdent une variante surconvergente : c'est-à-dire que l'on aimerait pouvoir obtenir une interprétation des isocristaux surconvergents pour la cohomologie de De Rham-Witt surconvergente. On peut y parvenir en considérant des connexions de De Rham-Witt surconvergentes comme définies par Ertl, pour lesquelles on peut raisonnablement espérer retrouver les mêmes opérations cohomologiques que pour les F-isocristaux.Cette question fut la motivation de cette thèse, et le théorème principal de ce travail y répond en partie positivement. Pour y parvenir, il est nécessaire d'expliciter la structure locale du complexe de De Rham-Witt surconvergent, et de redéfinir la notion de surconvergence afin de pouvoir mieux contrôler la convergence des produits de différentielles de De Rham-WittUnder a few assumptions, we prove an equivalence of category between a subcategory of F-isocristals on a smooth algebraic variety and overcongergent integrable De Rham-Witt connections. We do so by giving an equivalent definition of overconvergence, and by studying the explicit local structure of the De Rham-Witt complex
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Schlierkamp, Thorben [Verfasser], Jochen [Akademischer Betreuer] Wengenroth, Jochen [Gutachter] Wengenroth, and Leonhard [Gutachter] Frerick. "De Rham and Cech-de Rham Cohomologies of Smooth Foliated Manifolds / Thorben Schlierkamp ; Gutachter: Jochen Wengenroth, Leonhard Frerick ; Betreuer: Jochen Wengenroth." Trier : Universität Trier, 2021. http://d-nb.info/1238896499/34.
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Worrell, Lisa Marie. "The origin of igneous cumulates : integrated studies of peridotites from the western layered series of the Rum layered intrusion." Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250323.
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Andréasson, Fredrik. "Higher order differentials and generalized Cartan-de Rham complexes." Doctoral thesis, KTH, Mathematics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3597.
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Grimm, Felix Fritz [Verfasser], and Katrin [Akademischer Betreuer] Wendland. "The chiral de Rham complex of tori and orbifolds." Freiburg : Universität, 2016. http://d-nb.info/1124004785/34.
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Aggarwal, Kamna. "A View of the IMD Pathway from the RHIM." eScholarship@UMMS, 2010. https://escholarship.umassmed.edu/gsbs_diss/463.
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Innate immunity is the first line of defense against invading pathogens. It functions to eliminate pathogens and also to control infections. The innate immune response is also important for the development of pathogen-specific adaptive immune responses. As a result, the study of innate immune signaling pathways is crucial for understanding the interactions between host and pathogen. Unlike mammals, insects lack a classical adaptive immune response and rely mostly on innate immune responses.
Innate immune mechanisms have been widely studied in the fruit fly, Drosophila melanogaster. The genetic and molecular tools available in the Drosophila system make it an excellent model system for studying immunity. Furthermore, the innate immune signaling pathways used by Drosophila show strong homology to those of vertebrates making them ideal for studying these pathways. Drosophila immunity relies on cellular and humoral innate immune responses to fight pathogens. The hallmark of the Drosophilahumoral immune response is the rapid induction of antimicrobial peptide genes in the fat body. The production of these antimicrobial peptides is regulated by two immune signaling pathways-Toll and Immune Deficency (IMD) pathways.
The Toll pathway responds to many Gram-positive bacterial and fungal infections , while the IMD pathway is potently activated by DAP-type peptidoglycan (PGN) from Gram-negative bacteria and certain Gram-positive bacteria. Two receptors, PGRP-LC and PGRP-LE, are able to recognize DAP-type PGN at the cell surface or in the cytosol, respectively, and trigger the IMD pathway. Upon binding DAP-type PGN, both PGRP-LC and PGRP-LE dimerize/ multimerize and signal to the downstream components of IMD pathway. It is unclear how the receptor activates its downstream components.
My work has focused on understanding the molecular events that take place at the receptors following there activation. In these studies I have identified a common motif in the N-terminal domains of both the receptors, known as the RHIM-like domain. The RHIM-like domain is critical for signaling by either receptor, but the mechanism(s) involved remain unclear. IMD, a downstream component of the pathway, associates with both PGRP-LC and -LE but the interaction of PGRP-LC with IMD is not mediated through its RHIM-like domain. Also, mutations affecting the PGRP-LC RHIM-like motif are defective in all known downstream signaling events. However, the RHIM-like mutant receptors are capable of serving as a platform for the assembly of all known components of a receptor proximal signaling complex. These results suggest that another, unidentified component of the IMD signaling pathway may function to mediate interaction with the RHIM-like motif.
I performed a yeast two-hybrid screen to identify proteins that might interact with the receptor PGRP-LC through its RHIM- like domain. With this approach, two new components of the IMD pathway were identified. The first component I characterized is called Rudra and it is a critical feedback inhibitor of peptidoglycan receptor signaling. The other factor is known as RYBP, it includes a highly conserved ubiquitin binding motif (NZF), and RNAi studies suggest it is a critical component of the IMD pathway. The identification and characterization of these two new components of the IMD pathway has provided a new insight into the molecular events that take place proximal to the receptor.
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Schüler, Axel. "Äußere Algebren, de-Rham-Kohomologie und Hodge-Zerlegung für Quantengruppen." Doctoral thesis, Universitätsbibliothek Leipzig, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-218057.
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In dieser Arbeit wird die de-Rham-Kohomologie für die Quantengruppen zu den vier klassischen Serien von Lie-Gruppen bestimmt und es wird der Hodgeschen Zerlegungssatz gezeigt. Als entscheidendes Mittel wurde der Laplace-Beltrami-Operator L für Woronowicz’ äußere Algebren entwickelt. Für transzendente Werte von q und reguläre Kalkülparameter z ist L diagonalisierbar. Für die obigen Quantengruppen bestimmen wir die Eigenwerte von L, die neben q und z von zwei integralen dominanten Gewichten abhängen. Wie im klassischen Fall wird die de-Rham-Kohomologie durch harmonische Formen repräsentiert. Jedoch entspricht nur im Fall der A-Serie jeder harmonischen Form auch eine de-Rham-Kohomologieklasse. Im Falle der B-, C- und D-Serien sind biinvariante Formen nicht notwendig geschlossen. Es gilt aber, dass jede biinvariante Form harmonisch ist. Das zweite Hauptresultat ist die Hodge-Zerlegung für die Quantengruppen GLq(N) und SLq(N): Ist der Kalkülparameter z regulär, so lässt sich jede Form eindeutig zerlegen in die Summe aus einem Rand, einem Korand und einem Kohomologierepräsentanten. Ferner gilt, analog zum klassischen Fall, dass die folgenden drei Formenräume übereinstimmen: die biinvarianten Formen, die harmonischen Formen und die de-Rham-Kohomologie. Für die orthogonalen und symplektischen Quantengruppen gibt es keine vollständige Hodge-Zerlegung. Nur für die Elemente, die im Bild des Laplace-Beltrami-Operators liegen, gibt es eine eindeutige Zerlegung in Rand und Korand. Für die Standardkalküle auf den Quantengruppen GLq(N) und SLq(N) wird die Größe von Woronowicz’ äußerer Algebra bestimmt. Es wird gezeigt, dass der Raum der linksinvarianten k-Formen (N² über k)-dimensional ist. Die Algebra der biinvarianten Formen ist graduiert kommutativ. Ihre Poincaré-Reihe ist (1+t)(1+t³) ... (1+t^(2N-1)). Biinvariante Formen sind geschlossenConsider one of the standard bicovariant first order differential calculi for the quantum groups GLq(N), SLq(N), SOq(N), or SPq(N), where q is a transcendental complex number. It is shown that the de Rham cohomology of Woronowicz' external algebra coincides with the de Rham cohomologies of its left-invariant, its right-invariant and its bi-invariant subcomplexes. In the cases GLq(N) and SLq(N), the cohomology ring is isomorphic to the left-invariant external algebra and to the vector space of harmonic forms. We prove a Hodge decomposition theorem in these cases. The main technical tool is the spectral decomposition of the quantum Laplace-Beltrami operator. As in the classical case all three spaces of differential forms coincide: bi- invariant forms, harmonic forms and the de-Rham-cohomology. For orthog- onal and symplectic quantum groups there is no complete Hodge decompo- sition. In case of the standard calculi on the quantum groups GLq(N) and SLq(N), the size of exterior algebra is computed. The space of left-invariant k-forms has dimension C(N², k) (binomial coefficient). The algebra of bi-invariant forms is graded commutative with Poincaré series (1+t)(1+t³) ... (1+t^(2N-1)). Bi-invariant forms are closed
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Faithfull, John William. "Petrology and geochemistry of gabbroic and ultrabasic rocks from eastern Rhum." Thesis, Durham University, 1986. http://etheses.dur.ac.uk/6867/.
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This work is concerned with the lower part of the Eastern Layered Series (LELS) of Rhum, and with the marginal relationships of the ultrabasic complex in eastern Rhum. The Lower Eastern Layered Series comprises approximately Units 1-5 of previous workers. Remapping has revealed considerable along-strike lithological variation in the units of the L.E.L.S. It is suggested, on the basis of field and geochemical evidence, that two layers formerly regarded as 'conformable intrusive sheets of fine grained olivine gabbro' may be evolved allivalite layers rather than later intrusions. Xenolith suites in these layers and elsewhere, indicate a component derived from the roof or walls of the magma chamber. Cryptic variation is more extensive in the L.E.L.S. than in other parts of Rhum: olivine forsterite content varies from 85.6 to 70, and clinopyroxene MgX100/(Mg+Fe) varies from 88 to 74. Post-cumulus effects and sub-solidus re-equilibration have altered the initial compositions of the mineral phases. The migration of interstitial liquids has had a major effect on mineral chemistry. Replacement of plagioclase-rich rocks by peridotite is a significant process in parts of the sequence. This is ascribed to disequilibrium between migrating pore liquids and plagioclase. The data are consistent with a model of repeated replenishment by picritic magma, although the replenishing liquids may have been slightly less magnesian than those subsequently available during the formation of the upper ELS. Re-examination of the eastern margin of the ultrabasic complex suggests that the ultrabasic rocks formed more or less in situ, and that fragments of the roof to the intrusion occur in places. Locally under these roof fragments variolitic olivine-rich gabbros are developed, which may represent the chilled margin to the ultrabasic complex.
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González, Arcos Angélica Viviana. "RhPt and Ni based catalysts for fuel reforming in energy conversion." Doctoral thesis, KTH, Kemisk teknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160026.
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Although current trends in global warming are of great concern, energy demand is still increasing, resulting in increasing pollutant emissions. To address this issue, we need reliable renewable energy sources, lowered pollutant emissions, and efficient and profitable processes for energy conversion. We also need to improve the use of the energy, produced by existing infrastructure. Consequently, the work presented in this thesis aims at investigating current scientific and technological challenges in energy conversion through biomass gasification and the alternative use of fossil fuels, such as diesel, in the generation of cleaner electricity through auxiliary power units in the transport sector. Production of chemicals, syngas, and renewable fuels is highly dependent on the development and innovation of catalytic processes within these applications. This thesis focuses on the development and optimization of catalytic technologies in these areas. One of the limitations in the commercialization of the biomass gasification technology is the effective catalytic conversion of tars, formed during gasification. Biomass contains high amounts of alkali impurities, which pass on to the producer gas. Therefore, a new material with alkali tolerance is needed. In the scope of this thesis, a new catalyst support, KxWO3 – ZrO2 with high alkali resistance was developed. The dynamic capability of KxWO3 – ZrO2 to store alkali metals in the crystal structure, enhances the capture of alkali metals "in situ". Alkali metals are also important electronic promoters for the active phase, which usually increases the catalysts activity and selectivity for certain products. Experimental results show that conversion of 1-methylnaphathalene over Ni/KxWO3 – ZrO2 increases in the presence of 2 ppm of gas-phase K (Paper I). This support is considered to contribute to the electronic equilibrium within the metal/support interface, when certain amounts of alkali metals are present. The potential use of this support can be extended to applications in which alkali "storage-release" properties are required, i.e. processes with high alkali content in the process flow, to enhance catalyst lifetime and regeneration. In addition, fundamental studies to understand the adsorption geometry of naphthalene with increasing temperature were performed in a single crystal of Ni(111) by STM analyses. Chapter 9 presents preliminary studies on the adsorption geometry of the molecule, as well as DFT calculations of the adsorption energy. In relation to the use of clean energy for transport applications, hydrogen generation through ATR for FC-APUs is presented in Papers II to V. Two promoted RhPt bimetallic catalysts were selected in a previous bench scale study, supported on La2O3:CeO2/d – Al2O3 and MgO : Y2O3/CeO2 – ZrO2. Catalyst evaluation was performed in a fullscale reformer under real operating conditions. Results showed increased catalyst activity after the second monolithic catalyst due to the effect of steam reforming, WGS reaction, and higher catalyst reducibility of the RhxOy species in the CeO2 – ZrO2 mixed oxide, as a result of the improved redox properties. The influence of sulfur and coke formation on diesel reforming was assessed after 40 h on stream. Sulfur poisoning was evaluated for the intrinsic activity related to the total Rh and Pt area observed after exposure to sulfur. Sulfur concentration in the aged catalyst washcoat was observed to decrease in the axial direction of the reformer. Estimations of the amount of sulfur adsorbed were found to be below the theoretical equilibrated coverage on Rh and Pt, thus showing a partial deactivation due to sulfur poisoning.QC 20150213
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Silva, Josà Gleison Carneiro da. "Grupos de holonomia e o teorema de decomposiÃÃo de de Rham." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5729.
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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel SuperiorNesta dissertaÃÃo fazemos uma breve exposiÃÃo sobre grupos de holonomia de variedades riemannianas e provamos alguns resultados tÃcnicos necessÃrios para garantir a existÃncia de uma decomposiÃÃo de de Rham de uma variedade riemanniana completa e simplesmente conexa. Tal existÃncia constitui a parte essencial de um famoso resultado sobre grupos de holonomia, o teorema de decomposiÃÃo de de Rham, cuja demonstraÃÃo constitui o cerne deste trabalho.
In this report we give a brief description of holonomy groups of Riemannian manifolds and prove some technical results needed to guarentee the existence of a de Rham decomposition of a complete and simply connected Riemannian manifold. Such an existence constitutes itself as the core of a famous result on holonomy groups, they so-called de Rham's decomposition theorem, whose proof is our ultimate goal.
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Rodrigues, Jacinto Joaquín. "(ϕ,Γ)-modules de de Rham et fonctions L p-adiques." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066512.
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Nous étudions, dans cette thèse, la construction des fonctions L p-adiques des motifs sur Q et, plus particulièrement, des formes modulaires. Dans les premiers trois chapitres on étend des constructions de Perrin-Riou pour construire, pour une représentation p-adique de de Rham V du groupe de Galois absolu G_Qp de Qp (ou, plus généralement, un (ϕ,Γ)-module de de Rham sur l'anneau de Robba) et un système compatible d'éléments globaux, une fonction L p-adique. On montre, en utilisant des lois de réciprocité montrées par Perrin-Riou, Colmez, Cherbonnier-Colmez, Berger et Nakamura, que ces fonctions interpolent des valeurs arithmétiques intéressantes aux caractères localement algébriques.Dans les derniers trois chapitres, on se spécialise au cas de dimension 2. On démontre, en s'inspirant des techniques de Nakamura et des nouvelles techniques de changement de poids de Colmez introduites pour l'étude des vecteurs localement algébriques dans la correspondance de Langlands L p-adique pour GL₂(Qp), une équation fonctionnelle pour notre fonction L p-adique. Comme une application de cette équation fonctionnelle, on fournit les argument manquants dans les travaux de Nakamura, complétant la preuve de la conjecture ε locale de Kato pour les représentations de dimension 2. Pour le motif associé à une forme modulaire, on utilise tous ces résultats pour interpréter les valeurs interpolées par la fonction L p-adique en termes des valeurs spéciales de la fonction L complexe de cette formeThis thesis studies the construction of p-adic L-functions associated to motives over Q and, in particular, to modular forms.In the first three chapters we generalize some constructions of Perrin-Riou in order to construct, for any p-adic de Rham representation V of the absolute Galois group G_Qp of Qp (or, more generally, any de Rham (ϕ,Γ)-module over the Robba ring) and any compatible system of global elements, a p-adic L-function. We show, by the use of some reciprocity laws proved by Perrin-Riou, Colmez, Cherbonnier-Colmez, Berger and Nakamura, that these functions interpolate interesting arithmetic values at locally algebraic characters.The last three chapters deal with the particular case of dimension 2. We show, inspired by some techniques of Nakamura and certain weight change techniques introduced by Colmez for the study of locally algebraic vectors in the p-adic Langlads correspondence for GL₂(Qp), that our p-adic L-function satisfies a functional equation. As an application of our functional equation, we fulfil the missing arguments in the work of Nakamura, providing a complete proof of Kato's local ε-conjecture for 2-dimensional representations. For the motive associated to a modular form, we use these results to interpret the interpolated values of the p-adic L-function in terms of special values of the complex L-function of the form
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Luna, Rodrigo Moreno. "Cohomologias de de Rham e Doubeault em teorias de campo abeliano." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Física, 2010. http://www.bibliotecadigital.uel.br/document/?code=vtls000159751.
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Nesta dissertação analisamos formas diferenciais e suas relações com as cohomologias de de Rham e de Dolbeault. Discutimos as aplicações dessas cohomologias em teorias de campo abelianas.In this dissertation we analyze the differential forms with it relations to the de Rham and Dolbeault cohomologies. We discuss the aplications of these cohomologies to the abelian field theories.
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Silva, José Gleison Carneiro da. "Grupos de holonomia e o teorema de decomposição de de Rham." reponame:Repositório Institucional da UFC, 2011. http://www.repositorio.ufc.br/handle/riufc/878.
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SILVA, José Gleison Carneiro da ; MUNIZ NETO, Antônio Caminha. Grupos de holonomia e o teorema de decomposição de de Rham. 2011. 40f. Dissertação (mestrado)- Universidade Federal do Ceará, Pós-Graduação em Matemática, Fortaleza-CE, 2011.Submitted by Rocilda Sales (rocilda@ufc.br) on 2011-10-10T12:47:46Z No. of bitstreams: 1 2011_dis_jgcsilva.pdf: 443077 bytes, checksum: 0c30fd075df571c219406e6159d2b9c7 (MD5)
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In this report we give a brief description of holonomy groups of Riemannian manifolds and prove some technical results needed to guarentee the existence of a de Rham decomposition of a complete and simply connected Riemannian manifold. Such an existence constitutes itself as the core of a famous result on holonomy groups, they so-called de Rham's decomposition theorem, whose proof is our ultimate goal.
Nesta dissertação fazemos uma breve exposição sobre grupos de holonomia de variedades riemannianas e provamos alguns resultados técnicos necessários para garantir a existência de uma decomposição de de Rham de uma variedade riemanniana completa e simplesmente conexa. Tal existência constitui a parte essencial de um famoso resultado sobre grupos de holonomia, o teorema de decomposição de de Rham, cuja demonstração constitui o cerne deste trabalho.
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Damaville, Stéphane. "Opérateurs réguliers sur les modules de Hilbert associés au complexe de Rham." Paris 7, 2002. http://www.theses.fr/2002PA077230.
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Oucherif-El, Khalloufi Dounia. "Produit interne de modules de Dieudonné et complexe de De Rham-Witt." Valenciennes, 2001. https://ged.uphf.fr/nuxeo/site/esupversions/099c2900-d86a-4851-876b-69c6d001c446.
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Dans l'étude des variétés ou des schémas, le complexe de De Rham est un bon outil pour construire une théorie cohomologique lorsque la caractéristique du corps de base est nulle. En caractéristique positive, plusieurs méthodes ont été utilisées pour construire une généralisation de ce complexe, en particulier Illusie a construit un complexe appelé complexe de De Rham-Witt, qui permet de calculer la cohomologie cristalline. Dans cette construction, la structure de module sur l'anneau de Dieudonné, et en particulier l'action du morphisme de Frobenius n'apparait qu'à la fin, grâce au complexe des formes entières. Dans ce travail, nous construisons à la Kähler, dans le cas d'une algèbre de polynômes, un complexe appelé complexe de De Rham Dieudonné, tout en conservant la structure de module sur l'anneau de Dieudonné. Nous avons calculé explicitement ce complexe et nous montrons qu'il est isomorphe au complexe des formes entières.
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Thompson, Katherine Russell. "The ecology of the Manx shearwater Puffinus Puffinus on Rhum, West Scotland." Thesis, Connect to e-thesis, 1987. http://theses.gla.ac.uk/636/.
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Thesis (Ph.D.) - University of Glasgow, 1987.Ph.D. thesis submitted to the Faculty of Biomedical and Life Sciences, Department of Environmental and Evolutionary Biology, Unversity of Glasgow, 1987. Includes bibliographical references. Print version also available.
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Rülling, Kay. "Additive Chow groups with higher modulus and the generalized de Rham-Witt complex." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975240412.
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Magnet, Raphël. "Contribution à l'étude de l'influence des micro-organismes sur la composition du rhum." Phd thesis, Université de la Réunion, 1997. http://tel.archives-ouvertes.fr/tel-00488438.
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Le rhum de la distillerie de Savanna est obtenu après fermentation par les levures puis distillation d'un mout constitué de mélasse et d'eau. Nous avons donc étudié la composition de la mélasse. Celle-ci se révèle riche en composés aromatiques qui sont à l'origine des nombreux composés chimiques présents dans les rhums. Nous avons identifié plus de 100 composés chimiques dans la mélasse dont un isomère de la béta-damascenone. Cet isomère pourrait présenter les notes organoleptiques caractéristiques du rhum. Un travail particulier sur des précurseurs d'arômes existant sous forme glycosylée a été entrepris. Puis nous avons étudié le comportement de sept souches de levure et de neuf souches de bactérie en fermentation. Certains paramètres de la fermentation ont été suivis. Nous avons ensuite travaillé sur la composition des distillats. Une étude quantitative et qualitative sur les composés des distillats a été menée. Elle permet de différencier les micro-organismes en fonction des composés chimiques formés pendant la fermentation. Plus de 250 composés ont été identifiés dont 11 n'avaient jamais été mentionnés auparavant dans les rhums. Ce travail permet de se rendre compte de l'importance de la composition de la matière première utilisée et de la nature du micro-organisme employée pendant la fermentation, dans la composition finale du produit.
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Lan, Guitang [Verfasser]. "Periodic Higgs-de Rham flows and representations of algebraic fundamental groups / Guitang Lan." Mainz : Universitätsbibliothek Mainz, 2014. http://d-nb.info/1053544936/34.
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Taylor, Deborah Louise. "Detailed analysis of rhp9'+ and two novel Pmt3-specific hydrolases in Schizosaccharomyces pombe." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.340795.
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Magnet, Raphaël. "Contribution à l'étude de l'influence des micro-organismes sur la composition du rhum." La Réunion, 1997. http://tel.archives-ouvertes.fr/tel-00488438/fr.
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Le rhum de la distillerie de Savanna est obtenu après fermentation par les levures puis distillation d'un mout constitué de mélasse et d'eau. Nous avons donc étudié la composition de la mélasse. Celle-ci se révèle riche en composés aromatiques qui sont à l'origine des nombreux composés chimiques présents dans les rhums. Nous avons identifié plus de 100 composés chimiques dans la mélasse dont un isomère de la béta-damascenone. Cet isomère pourrait présenter les notes organoleptiques caractéristiques du rhum. Un travail particulier sur des précurseurs d'arômes existant sous forme glycosylée a été entrepris. Puis nous avons étudié le comportement de sept souches de levure et de neuf souches de bactérie en fermentation. Certains paramètres de la fermentation ont été suivis. Nous avons ensuite travaillé sur la composition des distillats. Une étude quantitative et qualitative sur les composés des distillats a été menée. Elle permet de différencier les micro-organismes en fonction des composés chimiques formés pendant la fermentation. Plus de 250 composés ont été identifiés dont 11 n'avaient jamais été mentionnés auparavant dans les rhums. Ce travail permet de se rendre compte de l'importance de la composition de la matière première utilisée et de la nature du micro-organisme employée pendant la fermentation, dans la composition finale du produit.
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Almeida, Junior Raimundo José. "O teorema de decomposição de hodge-de rham e os solitons de ricci." Instituto de Matemática . Departamento de Matemática, 2013. http://repositorio.ufba.br/ri/handle/ri/19413.
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A teoria dos solitons de Ricci desempenha um papel fundamental no estudo dos fluxos de Ricci Hamiltonianos. Tal estudo serviu de base para a demonstração da Conjectura de Poincaré, problema que durou muitos anos na Matemática e só foi solucionado por Gregori Perelman em 2002. Este trabalho tem como objetivo demonstrar o Teorema de decomposição de Hodge-de Rham e apresentar resultados acerca dos solitons de Ricci obtidos a partir deste. Encontram-se estes resultados no artigo "Some applications of the Hodge-de Rham decomposition to Ricci solitons
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Richer, Yves-Marcelle. "L' industrie du rhum à la Martinique : l'appellation d'origine contrôlée : une stratégie de différenciation qualitative dans le contexte de la mondialisation." Antilles-Guyane, 2004. http://www.theses.fr/2004AGUY0122.
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L'industrie du rhum à la Martinique a subi au cours des trois dernières décennies, une transformation profonde, qui a profondément affecté à des degrés divers, ses composantes humaines, matérielles, techniques, économiques et spatiales. Avec l'obtention en 1996 de l'appelation d'origine contrôlée, le rhum agricole de Martinique est devenu une référence. Ce label de qualité fait d'un produit colonial ordinaire, un alcool spécifique donnant de la Martinique, autrefois "île à sucre" puis "île à rhum", le statut "d'île terroir". L'industrie rhumière se situe actuellement au coeur d'une véritable dynamique économique et culturelle qui peut se décliner en trois points: une production de rhum insuffisante pour répondre à la demande, des planteurs qui se lancent à nouveau dans la culture de la canne à sucre afin de pallier le manque de matières premières, et enfin, des unités de production de plus en plus performantes qui deviennent des lieux récréatifs pour les touristes et la population locale. De plus, en raison de l'importance des flux commerciaux générés par les exportations, le rhum est confronté aux problèmes de la mondialisation et s'inscrit ainsi dans un système d'espaces emboîtés à l'échelle régionale, nationale et internationale. Cette recherche vise donc à étudier les enjeux de la démarche de qualification du rhum agricole, à déterminer les atouts et les contraintes de ce label spécifique, et à en mesurer les conséquences spatiales et économiques aux différentes échellesOver the last three decades, the rum undustry in Martinique has gone through a deep change which has, at various levels, affected its human, material, technical, economic and spatial components. When it got the "appellation contrôlée" in 1996, the agricultural Martinican rum became a reference. As a result, it can insist upon the specificities of its native soil, its geografic roots, and also upon the heritage of a tradition and a know-how which is wholly codified today by the AOC legislation. This seal of quality turns an ordinary colonial produce into a special, high standard liquor, which confers to Martinique, formerly "sugar island", then "rum island", a new status based on the specificity and quality of its rum production. Today, the rum industry is at the heart of a true cultural and economic dynamic wich can be expressed in three points: first, the rum production meets the demand insufficiently, second, some planters have returned to the cultivation of sugar cane to make up to the lack of raw material, third, the productions units are more performant and have also become recreational sites for the tourist and local population. Moreover, due to the important commercial flows generated by exports, the rum is confronted with the issues of globalisationand is in keeping with a system of space that fit on the local, national and international scale. Therefore, this research aims at studying what is at stake in the processes of qualification of agricultural rum, at determining the assets anconstraints of this specific label and at measuring its spatial and economic consequences at the various scale
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Shanmugam, Nirukshan. "Biophysical investigation of the amyloidogenic potential of human and viral necroptosis-associated proteins." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25455.
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Functional amyloids form a growing list of proteins that can adopt a fibrillar amyloid structure for functional purposes. In cell death signalling via necroptosis, the RIP kinases 1 (RIPK1) and 3 (RIPK3) interact to form hybrid amyloid assemblies via a protein-protein interaction motif, termed RIP-homotypic interaction motif (RHIM). RHIM sequences are ~18 residue long and contain a highly conserved tetrad sequence (V/I)-Q-(V/I/L/C)-G. The cytosolic nucleic acid sensor Z-DNA binding protein 1 (ZBP1) can also drive necroptosis via interaction with RIPK3, upon sensing of viral nucleic acid. Unlike other RHIM-containing proteins, ZBP1 contains three putative RHIM sequences. Although the first RHIM, termed RHIM-A, has been suggested to be most important for RHIM mediated interactions, the role of the multiple ZBP1 RHIMs has not been probed extensively. I have introduced tetra-alanine mutations into the tetrad sequences in the multiple RHIMs of ZBP1 in order to identify their role in functional amyloid assembly. Biophysical characterisation of the recombinantly produced mutant ZBP1 proteins reveals that mutation of the tetrad sequence of the ZBP1 RHIMs does not completely abrogate amyloid formation, although differences in the extent of amyloid formation are seen upon binding to the amyloid-specific dye Thioflavin T. Importantly, mutation of RHIM-A but not RHIM-B nor C dramatically alters the morphology of ZBP1 amyloid as visualised by transmission electron microscopy. RHIM-A mutants also form smaller amyloid assemblies than the wild type protein and other mutants and these can be easily depolymerised by detergent. Surprisingly, the RHIM-B and C mutant constructs display an increased propensity to form large assemblies that are resistant to depolymerisation, even more-so than the wild type protein. Altogether amyloid formation by ZBP1 RHIM in vitro echoes its cellular function where RHIM-A is vital for necroptosis-related protein-protein interactions, while RHIM-B tempers the activity of RHIM-A. I have also utilised the multiple ZBP1 RHIM mutant proteins to investigate a series of putative new amyloid reporter dyes and have outlined potential binders to the ZBP1 amyloid scaffold.
In the second part of this thesis, I have investigated the viral RHIM containing protein ICP6, encoded by herpes simplex virus 1 (HSV-1). Necroptosis is important for antiviral host defence but some viruses, including HSV 1, have evolved adaptations against this form of cell death. Investigation of recombinantly produced ICP6 RHIM reveals that it can form amyloid structures in vitro. This aligns with other work from the Sunde laboratory, which has shown that murine cytomegalovirus (MCMV) and varicella-zoster virus (VZV) encode the RHIM containing proteins M45 and ORF-20, respectively, which form amyloid structures in vitro and interact with host-RHIM containing proteins RIPK3, and ZBP1. Importantly, ICP6 RHIM amyloid is sensitive to a reducing milieu, a property not associated with other proteins of the RHIM family. Unlike M45 and ORF20, ICP6 does not form large homomeric amyloid assemblies, rather preferentially forms heteromeric assemblies with host RHIM proteins.
Moreover, tetra alanine mutation of the ICP6 RHIM tetrad inhibits amyloid formation and disrupts its interaction with host-RHIM proteins. Characterisation of ICP6 RHIM revealed that an intra-molecular disulfide bond between Cys75 and Cys79 confers distinct amyloid characteristics not seen with previously characterised viral proteins M45 and ORF20. Formation of virus-host mixed amyloid may prevent host RHIM proteins from interacting and activating the downstream necroptosis cascade.
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Jiménez, Divins Núria. "Catalytic hydrogen production over RhPd/CeO2 catalysts and CO purification over Au/TiO2 catalysts." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/346926.
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This Thesis focuses on the study of the catalytic production of hydrogen from a biofuel, namely the bioethanol. It also studies the subsequent purification of pre-cleaned reformate streams. The end use of the hydrogen produced is to feed fuel cells to power portable and mobile applications. In this Thesis, two types of catalysts have been developed. One consisting of RhPd/CeO2 catalysts aimed at generating hydrogen via the ethanol steam reforming. On the other hand, Au/TiO2 catalysts have been investigated to eliminate carbon monoxide from reformate streams. The developed catalysts have been tested under practical operational conditions. The developed catalysts have been characterized ex situ, in situ and under reaction conditions. The operando studies allowed for the investigation of the reorganization of the metals driven by the reactive atmosphere. Finally, the miniaturization of the hydrogen production and purification scale has been investigated. To achieve this goal, the developed catalysts have been implemented on microreactors composed of channels measuring only few microns.A la present Tesi doctoral s'estudien la producció catalítica d'hidrogen a partir d'un biocombustible, el bioetanol, i la seva posterior purificació per alimentar piles de combustible que proporcionin energia a aplicacions portàtils i mòbils. S'han desenvolupat dues famílies de catalitzadors, una de RhPd/CeO2 per generar hidrogen a partir de la reformació amb vapor d'etanol, i l'altra d'Au/TiO2 per eliminar el monòxid de carboni dels corrents de reformació pre-purificats. Els catalitzadors han estats estudiats en condicions de reacció properes a la indústria. En aquesta tesi s'han caracteritzat els catalitzadors ex situ, in situ i també en condicions “operando” o de reacció. L'estudi en “operando” dels catalitzadors ha permès investigar la reorganització induïda pels reactius dels components del catalitzador. Finalment, també s'ha estudiat la miniaturització tant del sistema de generació com de purificació de l'hidrogen per tal d'alimentar aplicacions de petit consum. Per això, s'han utilitzat microreactors composats de canals en l'escala del micròmetre.
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Greenwood, Richard C. "Geology and petrology of the margin of the Rhum ultrabasic intrusion, Inner Hebrides, Scotland." Thesis, University of St Andrews, 1988. http://hdl.handle.net/10023/7123.
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Country rocks surrounding the Rhum Tertiary ultrabasic complex have experienced severe thermal metamorphism, partial melting and mobilization resulting in the formation of extensive areas of intrusion breccia. Evidence from several sources indicates a maximum temperature in the country rocks of 960 ± 40°C. Contrary to previous suggestions the complex was not emplaced as a fault block enclosed by a "Marginal Gabbro", but formed in situ at a depth of less than 1Km. Large-scale layering continues to within 2m of the country rocks, and shows no change in either thickness or orientation close to the contact. Smallscale layers at Harris Bay thin and terminate towards the contact with the Western Granophyre. Strontium isotope data showsthat the margins of the complex have experienced considerable crustal contamination. Contamination may have taken place by mixing of anatectic country rock melt with the resident basaltic liquid during boundary flow. Whole-rock and isotope geochemistry suggests that marginal microgranodiorite ("hybrid rocks") formed during a process of combined assimilation and fractional crystallization. Lead isotope data indicate that rocks of the ultrabasic complex, as well as earlier Tertiary granophres and felsites, were contaminated with Lewisian lead. The crustal level at which this took place and the processes involved remain unclear. Oxygen isotope analyses show that rocks of the contact zone have undergone large-scale exchange with heated, meteoric fluids. In response to inflation of the complex the country rocks experienced considerable deformation, and in places the chamber roof underwent gravity collapse. Deformation resulted in increased country rock permeability, thus enhancing hydrothermal circulation and promoting high-cooling rates along the contact zone. A consequence of this process is the local preservation of quenched ultrabasic material at Harris Bay, and the ubiquitous development of rapid growth textures in all lithologies within the contact zone.
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Rozensztajn, Sandra. "Compactifications toroïdales et cohomologie de De Rham et cristalline de certaines variétés de Shimura." Paris 13, 2005. http://www.theses.fr/2005PA132040.
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L'objectif de cette thèse est de développer pour les groupes unitaires, et particulièrement le groupe GU(2,1), un équivalent du travail de Chai et Faltings sur les intégrales d'Eichler pour les groupes symplectiques. On abordera aussi l'aspect entier de cette théorie. La première étape consiste à construire de bonnes compactifications des modèles entiers de la variété de Shimura asssociée, et de son schéma abélien universel. Nous définissons ensuite des faisceaux cohérents automorphes sur la variété de Shimura associés à certaines représentations du groupe, et leur prolongement à la compactification, et nous étudions la cohomologie de ces faisceaux à laide du complexe BGG. Enfin on associe aux représentations du groupe des systèmes locaux dont on compare la cohomologie étale avec la cohomologie de De Rham et cristalline des faisceaux cohérents automorphes définis précédemment.
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Graziani, Giacomo. "Modular sheaves of de Rham classes on Hilbert formal modular schemes for unramified primes." Doctoral thesis, Università degli studi di Padova, 2020. http://hdl.handle.net/11577/3425908.
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We define formal vector bundles with marked sections on Hilbert modular schemes and we show how to use them to construct modular sheaves with an integrable meromorphic connection and a filtration which, in degree 0, gives to us a p-adic interpolation of the usual Hodge filtration. We define an U_p-operator on this sheaf and relate it with the sheaf of overconvergent Hilbert modular forms.
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Benquet, Corinne. "Effets des endotoxines bactériennes et du rhGM-CSF sur le métabolisme oxydatif des phagocytes humains." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0007/NQ39722.pdf.
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Suwa, Noriyuki. "Quelques résultats sur la cohomologie de Rham et la cohomologie étale des variétés de caractéristique." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376013849.
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KAZI, ANANYO. "OVERCONVERGENT MODULAR AND DE RHAM SHEAVES AND P-ADIC ITERATION OF THE GAUSS-MANIN CONNECTION." Doctoral thesis, Università degli Studi di Milano, 2022. https://hdl.handle.net/2434/949088.
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We construct p-adic iteration of the Gauss-Manin connection on overconvergent sheaves of de Rham classes on Hilbert modular varieties in the case p is unramified in the totally real field. This is a generalization of the work of Andreatta-Iovita in the case of elliptic curves, using a technique that marks an improvement on their approach in terms of convergence of the iterates of the connection.
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Suwa, Noriyuki. "Quelques résultats sur la cohomologie de De Rham et la cohomologie étale des variétés de caractéristique p ≠ 0." Paris 11, 1986. http://www.theses.fr/1986PA112167.
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Cette thèse comprend trois articles: 1) la cohomologie de de Rham des surfaces algébriques avec q=p::(a) en car. P, 2) sur la formule de Deuring Safarevic et un résultat de Nakjima, 3) sur l'image de l'application d'Abel-Jacobi de Bloch. On étudie diverses cohomologies - cohomologie de de rham, cohomologie cristalline, cohomologie étale p-adique et cohomologie étale l-adique - de variétés en caractéristique p non=0. Dans le premier article, on calcule les dimensions des groupes de cohomologie de de Rham et les nombres de Hodge pour les surfaces x lisses projectives avec q(x)=-p::(a)(x) en caractéristique p non=0, ou q(x) est l'irrégularité de x et p::(a)(x) le genre arithmétique de x. Comme application, on donne une preuve du critère de rationalité de Castelnuovo en caractéristique p non=0. Dans le deuxième article, on donne une autre démonstration de certains résultats de Nakajima sur la structure, comme g-modules de certains groupes de cohomologie associes aux courbes en caractéristique p non=0, sur lesquelles agit un p-groupe g. Dans le dernier article, on s'intéresse à l'image du groupe des cycles algébriques d'une variété, algébriquement équivalents à 0, par l'application d'Abel-Jacobi l-adique définie par Bloch. On montre que cette image est engendrée par les images des correspondances algébriques et en déduit une condition nécessaire pour la surjectivité de l'application d'Abel-Jacobi. On donne quelques exemples où l'application d'Abel-Jacobi est surjective. Par ailleurs, on présente des variantes algébriques et une autre preuve d'un théorème de Griffiths et étudie les pentes de la variété abélienne de Murre en caractéristique p non=0.
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Baker, Max Owen David Gus. "Tug-of-war: Characterising functional amyloid assemblies that trigger or terminate programmed cell death during viral infection." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/28074.
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Functional amyloid is an increasingly recognised type of protein assembly that can serve diverse physiological purposes. Functional amyloid is distinct from disease associated amyloid, which plays important aetiological roles in a number of irreversible and degenerative human and animal pathologies. Functional amyloid is a high molecular weight β-sheet rich protein assembly characterised by fibrillar architecture, insolubility, resistance to protease degradation and high stability. An important functional amyloid complex employed by mammals is the necrosome, which is a multi-component higher-order signalling assembly that drives the programmed cell death pathway necroptosis. Necroptosis is a crucial part of the innate immune system and is directly implicated in defense against important human pathogens. Necroptosis is mediated by protein:protein interaction sequences called RHIMs (RIP Homotypic Interaction Motifs). Due to its importance in curtailing infection, necrosome components are targeted for inhibition by pathogens using a suite of immune-evasive strategies. This thesis describes the analysis of RHIM-containing necrosome components associated with cell death signalling and virus RHIM-driven mechanisms to subvert necrosome function. The work in this thesis is divided into three major sections.
In the first section, analysis of the RHIM of TRIF, an innate immune adaptor protein that responds to ligation of Toll like receptors during pathogenic infection, was performed. It is known that when activated, TRIF associates with the kinases RIPK1 and RIPK3 through RHIM-based interactions. The interactions between TRIF and these two proteins can lead to activation of downstream cell death effectors that drive necroptosis. The work in this portion of the thesis describes elucidation of the biophysical characteristics of higher-order assemblies formed by the RHIM from TRIF. TRIF is shown to spontaneously self-assemble into amyloid assemblies with unique morphology dependent on the presence of the RHIM. The residues that comprise the insoluble amyloid core of TRIF were determined by protease digestion and mass spectrometry. Single molecule confocal coincidence spectroscopy was used to demonstrate direct interactions between TRIF and RIPK3 and/or RIPK1. The size and stability of these hetero-assemblies were investigated.
In the second section, a novel mechanism of inhibition of amyloid-driven cell death is described for Varicella Zoster virus, a medically important pathogenic herpesvirus. Herpesviruses can encode proteins that contain RHIM sequences. These virus RHIM sequences mediate protein:protein interactions with human RHIM-containing proteins, leading to human:virus protein hetero-assemblies that render the human proteins unable to signal for programmed cell death, which would otherwise destroy infected cells. A novel virus RHIM is described that is present in the Varicella Zoster virus protein ORF20. The RHIM from ORF20 is shown to be crucial for its infectivity. It is demonstrated that the RHIM from ORF20 is amyloidogenic, like other human and virus RHIMs. ORF20 can interact with the human cell death-associated proteins ZBP1, a nucleic acid sensor that directly responds to cytoplasmic viral ligands, and RIPK3. Interactions between ORF20 and ZBP1 result in the formation of hetero-assemblies that are larger and more stable and have morphology distinct from ZBP1 homo assemblies. These alterations in ZBP1 assembly properties are proposed to underlie the subversion of ZBP1 signalling that occurs during VZV infection.
In the third section, efforts are described to use fluorescent microscopy to detect amyloid necrosomes in cell culture. Despite the growing understanding of functional amyloid in many aspects of biology, there has been limited visualisation of functional amyloid within cells by common microscopy techniques. In particular, no fluorescent microscopy of endogenous RHIM-containing proteins in their amyloid state has been reported. In this project, iterative attempts to image both the identity and amyloid structure of the RIPK1 in the necrosome were performed. These experiments were performed with amyloid staining dyes including Thioflavin T and Thioflavin S, novel amyloid-specific antibodies OC and A11, and protein-specific antibodies for the necroptosis-associated proteins RIPK1 and MLKL. Ultimately, A11 was identified as a potentially useful probe for the detection of endogenous amyloid necrosomes.
Overall, the work in this thesis describes multiple aspects of functional amyloid associated with programmed cell death. Structural characterisation of cell death complexes is described in both physiological and pathological settings which are fundamental for understanding the molecular nature of innate immune signalling.
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Johansson, Jimmy. "A first principles study of the thermodynamics of phase separating systems -The examples RhPd and AlZn-." Thesis, Linköping University, Department of Physics, Chemistry and Biology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18517.
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A screened GPM approach in an EMTO-CPA framework was investigated in order to study its ability of describing transition temperatures in phase separating systems, i. e. systems giving either a random or a cluster structure depending on the temperature and the relative concentration of the ingoing atoms of the binary alloy used for the study. A motivation for the study is that the method works well for ordering systems, i. e. systems giving either a random or ordered structure dependent on the temperature and the relative concentration of the components in the binary alloy. Thereby is it of interest to find out the methods capacity in phase separating systems. The so called GPM potentials derived in the approach were applied in statistical Monte Carlo simulations for this purpose. The systems chosen for the investigation were the RhPd and the AlZn binary alloy systems. For both systems the method showed acceptable accuracy when properties as lattice parameter and mixing enthalpy were calculated. The quality of the derived GPM potentials has also been checked by calculating ordering energy for different ordered structures; directly from first principles calculations and from the GPM approach. The results were in acceptable agreement and thereby indicating that the GPM potentials were reliable. The transition temperatures in the RhPd phase diagram, derived by the statistical Monte Carlo simulations showed anyway deviation from experimental results. The error in the predictions might be due to the existing concentration dependencies in the GPM potentials.The conclusion from this study is that the Monte Carlo scheme might be inconvenient in order to handle the concentration dependencies seen in the GPM potentials.
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Scheider, René Achim [Verfasser], and Guido [Akademischer Betreuer] Kings. "The de Rham realization of the elliptic polylogarithm in families / René Achim Scheider. Betreuer: Guido Kings." Regensburg : Universitätsbibliothek Regensburg, 2014. http://d-nb.info/105419159X/34.
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Housden, J. "A magneto-mineralogical study of igneous rocks from the Rhum layered intrusion and the oceanic basements." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370858.
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Shum, Cheong Sing Alain. "Étude des composants aromatiques de Jumellea fragrans. Recherche des critères de qualité des rhums de la Réunion." Toulouse, INPT, 1992. http://www.theses.fr/1992INPT064G.
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Jumellea fragrans (Faham) est une orchidée endémique des Mascareignes. Elle est utilisée dans la pharmacopée traditionnelle (gastro-entérite infantile, digestion difficile, rhume,. . . ) et en tant qu'aromatisant dans le rhum à qui elle confère des notes : boisée, chartreuse, et vieux rhum. La recherche d'arômes nouveaux nous a conduit, dans les deux premières parties, à nous intéresser à sa composition. Les techniques d'enrichissement et de fractionnement par chromatographie multidimensionnelle, les techniques d'identification par CG/SM et CG/IRFT ont permis de recenser près d'une centaine de constituants dont quatre vingt cinq sont mineurs. La coumarine est le composé majoritaire (85 % de l'extrait). La CG/IRFT a confirmé certaines structures diterpéniques (kaurènes et phytadiènes). Divers extraits : résinoïde hydroalcoolique, extrait du CO 2 supercritique, espace de tête,. . . Ont également été analysés. L'analyse de données multidimensionnelle, en particulier l'ACP et l'AFD à partir des constantes physicochimiques (degré alcoométrique, indice de réfraction, acidités totale et volatile, teneurs en esters et et en aldéhydes totaux), et des données chromatographiques (composition en alcools supérieurs) de différentes catégories de rhums de La Réunion, fait l'objet de la trosième partie. Nous sommes parvenus à une différenciation nette entre les rhums : blancs, agricoles, légers, vieux de trois, cinq et dix ans aussi bien en fonction du type de rhum, de l'usine, de l'âge, de l'année de production qu'en fonction de l'origine (commerce ou usine). . . . Une comparaison avec les rhums de Martinique a aussi été abordée. Ce travail constitue une première étape dans la recherche d'outils simples dans la différenciation des différents rhums de La Réunion et dans l'amélioration de sa qualité.
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Apanon, Charles-Marie. "Les Stratégies des usines sucrières de la Martinique durant l'entre deux guerres. Contribution et l'étude de la gestion des firmes aux Antilles." Lille 1, 1988. http://www.theses.fr/1988LIL12010.
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L'étude des stratégies des sociétés sucrières de la Martinique entre 1919 et 1939 montre : 1_) que dans un environnement donne, la demande de sucre et d'alcool étant uniquement liée aux fluctuations des besoins de la France métropolitaine, les unités de production de la Martinique sont passées de l'euphorie (années 1920) a une situation d'impasse (années 1930). Certains producteurs ont alors choisi de consolider leur position relative en améliorant leur capacité de production pendant que d'autres attendaient une solution métropolitaine ; 2_) que l'analyse des états financiers d'un échantillon de cinq sociétés sucrières, qui constitue l'apport original de cette thèse, réfuté plusieurs idées généralement admises. Il apparait ainsi que les charges salariales sont très faibles et que les investissements réalisés sur la période ont surtout permis de maintenir l'outil industriel en état de fonctionnement, les principaux bénéficiaires des surplus dégagés par les usines étant l'état (au travers de la fiscalité) et les actionnaires de ces sociétésThe study of stategies of the martiniquan sugar firms between 1919 and 1939 shows : 1_) in a situation where demand for sugar and alcohol is determined closely by the fluctuations of french needs, the production of martiniquan factories had been encouraged during the 1920's, but the sluggishness had persisted throughout the 1930's. Then some producers chosed to develop their activity while others were adopting a waiting strategy. 2_) the originality of this thesis is the analysis of accounting documents of 5 sugar firms. We notice at the opposite of several studies, firstly that the amounts of salaries and wages are very low, and secoundly the capital expenditures realised during this period is the minimum to retain the facilities. The main winners of the sugar profit were the government (through the tax policy) and the shareholdres of the firms
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Magniez, Jocelyn. "Etude de la bornitude des transformées de Riesz sur Lp via le Laplacien de Hodge-de Rham." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0161/document.
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Cette thèse comporte deux sujets d’étude mêlés. Le premier concerne l’étude de la bornitude sur Lp de la transformée de Riesz d∆-½ , où ∆ désigne l’opérateur de Laplace-Beltrami (positif). Le second traite de la régularité de Sobolev W1,p de la solution de l’équation de la chaleur non perturbée. Nous établissons également quelques résultats concernant les transformées de Riesz d’opérateurs de Schrödinger avec un potentiel comportant éventuellement une partie négative.Dans le cadre de ces travaux, nous nous plaçons sur une variété riemanienne (M, g) complète et non compacte. Nous supposons que M satisfait la propriété de doublement de volume (de constante de doublement égale à D) ainsi qu’une estimation gaussienne supérieure pour son noyau de la chaleur (celui associé à l’opérateur ∆). Nous travaillons avec le laplacien de Hodge-de Rham, noté ∆, agissant sur les 1-formes différentielles de M. En s’appuyant sur la formule de Bochner, liant ∆ à la courbure de Ricci de M, nous assimilons ∆ à un opérateur de Schrödinger à valeurs vectorielles. C’est un argument de dualité, basé sur une formule de commutation algébrique, qui lie l’étude de ∆ à celle de ∆. [...]This thesis has two main parts. The first one deals with the study of the boundedness on Lp of the Riesz transform d∆-½ , where ∆ denotes the nonnegative Laplace-Beltrami operator. The second one deals with the Sobolev regularity W1,p of the solution of the heat equation. We also establish some results on the Riesz transforms of Schrödinger operators with a potential possibly having a negative part. In this work, we consider a complete non-compact Riemannian manifold (M, g). We assume that M satisfies the volume doubling property (with doubling constant equal to D) as well as a Gaussian upper estimate for its heat kernel associated to the operator ∆. We work with the Hodge-de Rham Laplacian ∆, acting on 1-differential forms of M. With the Bochner formula, linking ∆to the Ricci curvature of M, we see ∆ has a vector-valued Schrödinger operator. It is a duality argument, based on a commutation formula, which links the study of ∆to the one of ∆. [...]
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Freitas, Rubens Moreno de [UNESP]. "Comparação entre enxerto ósseo autógeno e rhMP-2 (infuse Bone Graft) na reconstrução de maxila atrófica anterior." Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/110826.
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000720965.pdf: 994392 bytes, checksum: f6ae537c66dde69858756ff87f9d4737 (MD5)O objetivo do estudo foi comparar o uso de rhBMP-2/ACS com o do enxerto ósseo autógeno para aumento ósseo em espessura na região anterior de maxila. 24 pacientes foram selecionados e divididos de forma randomizada em 2 grupos: Grupo 1 – rhBMP-2/ACS ou Grupo 2 – enxerto ósseo autógeno intraoral particulado. Uma malha de titânio foi utilizada para manutenção do arcabouço dos enxertos. O ganho ósseo clínico, a análise histológica/histomorfométrica (biópsia aos 6 meses), tomografias (pré-operatória, 3 e 6 meses) e PCR em tempo real (raspagem de osso neoformado obtida aos 6 meses) foram os métodos de avaliação. Clinicamente, o pós-operatório foi estável. O aumento ósseo médio em espessura clínica foi 3,2±0,9 vs. 3,7±2,1mm (p=0,31) para o Grupo 1 e Grupo 2, respectivamente. O Grupo 1 apresentou aumento ósseo tomográfico significante aos 2mm da crista óssea quando comparado ao Grupo 2 (1,5±0,7 vs. 0,5±0,9mm; p=0,01). Na análise histológica, o Grupo 1 apresentou uma medula óssea significativamente rica em células e vasos sanguíneos (p=0,002) quando comparado ao Grupo 2, entretanto, nenhuma diferença estatística foi encontrada para os outros parâmetros. PCR em tempo real resultou em maior expressão gênica de BMP2 e Runx2 (p=0,001 e p=0,0021, respectivamente) no Grupo 1 e RANKL:OPG, BSP e OPN no Grupo 2 (p=0,01, p=0,005 e p=0,0009, respectivamente). Um total de 62 implantes foram instalados aos 6 meses. Em conclusão, o Grupo 1 apresentou um aumento ósseo clínico e tomográfico comparável ao Grupo 2, apresentando um resultado histológico e de expressão gênica superior, sugerindo ser uma alternativa viável ao enxerto ósseo autógeno.
The objective of this study was to compare bone augmentation in the anterior maxilla following implantation of rhBMP2/ACS vs. autogenous bone graft. In this study, 24 patients were selected and equally randomized into 2 groups: Group 1 - rhBMP2/ACS or Group 2 - intraoral particulated autogenous bone graft. A titanium mesh was used for space provision in both Groups. Average clinical bone gain, histological/histomorphometrical (core biopsy obtained at 6 month), CBCT (preoperative, 3 and 6 months follow-up) and real time PCR (new bone scraped at 6 months) were used as evaluation methods. Clinical healing was generally uneventful. Mean clinical ridge width increased 3.2±0.9 vs. 3.7±2.1 mm (p=0.31) for Group 1 and Group 2, respectively. Group 1 yielded statistically significant CBCT bone gain only at subcrestal level compared with Group 2 (1.5±0.7 vs. 0.5±0.9mm; p=0.01). In the histological analysis, specimens from group 1 showed bone marrow significant richer in cells and capillaries (p=0.002) than Group 2, however no difference was found in other parameters. Real time PCR showed higher expression of genes BMP2 and Runx2 in Group 1 (p=0,001 e p=0,0021, respectively) and RANKL:OPG, BSP and OPN in Group 2 (p=0,01, p=0,005 and p=0,0009, respectively). A total of 62 implants were installed after 6 months. In conclusion, Group 1 supported clinically and tomographically relevant alveolar ridge augmentation of comparable magnitude to Group 2, presenting more favorable histological and gene expression results, suggesting an alternative for autogenous bone graft.
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Dogan, Ugur. "Overconvergent Frèchet Algebras in Rigid Analysis." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20423.
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Wir fixeren einen Körper k, der bezüglich eines nicht-archimedischen Absolutbetrags vollständig ist. In Kapitel 1 konstruieren wir eine Algebra U bestehend aus überkonvergenten Funktionen. Sie ist eine Unteralgebra der Tate-Algebra, wobei mittels einer sogenannten Filterfunktion, eine zusätzliche Wachstumsbedingung an die Koeffizienten der Potenzreihen in U gestellt wird. In diesem Kontext beweisen wir das folgende Resultat: U ist ein Noetherscher, Jacobsonscher, faktorieller Integritätsbereich, der bezüglich der Norm vollständig ist, und jedes Ideal in U ist abgeschlossen in der induzierten Topologie. In Kapitel 2 definieren wir die Kategorie der NMK-Algebren als die Kategorie der Quotienten der U. Indem wir in der größeren Kategorie der Frèchet-Räume arbeiten, beweisen wir die Noethernormalisierung und untersuchen die Morphismen zwishen NMK-Algebren. Schließlich zeigen wir, dass die Kategorie der NMK-Algebren abgeschlossen ist unter vervollständigten Tersorprodukten. In Kapitel 3 untersuchen wir geometrische Aspekte der Algebren U nämlich Eigenschaften der maximalen Ideale und die Regularität von U. Abschließend zeigen wir, dass für jedes U der assoziierte algebraische v exact in positiven Graden ist.We fix a complete field k with respect to a non-Archimedean absolute value. In Chapter 1, we build the overconvergent function algebra U to be the subalgebra of the Tate algebra by putting a growth condition on the coefficients of the power series using a decreasing function which we call a filter function (satisfying certain conditions). With this setting we prove the following result: U is a Noetherian, Jacobson, unique factorization domain and it is complete with respect to the norm on it, moreover every ideal of U is closed with respect to the induced topology. In Chapter 2, we define a category of NMK-algebras as the category of all quotients of U. Working in the larger category of Frèchet spaces, we establish Noether normalization and investigate the morphisms between NMK-algebras. Finally, we show that the category of NMK-algebras is closed under completed tensor products. We investigate certain geometric aspects of the algebra U in Chapter 3, such as the properties of maximal ideals and regularity of U. Further, we show that for each U the associated algebraic de Rham complex is exact in positive degrees.