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Ce document de thèse développe certains aspects du calcul stochastique via régularisation pour des processus X à valeurs dans un espace de Banach général B. Il introduit un concept original de Chi-variation quadratique, où Chi est un sous-espace du dual d'un produit tensioriel B⊗B, muni de la topologie projective. Une attention particulière est dévouée au cas où B est l'espace des fonctions continues sur [-τ,0], τ>0. Une classe de résultats de stabilité de classe C^1 pour des processus ayant une Chi-variation quadratique est établie ainsi que des formules d'Itô pour de tels processus. Un rôle significatif est joué par les processus réels à variation quadratique finie X (par exemple un processus de Dirichlet, faible Dirichlet). Le processus naturel à valeurs dans C[-τ,0] est le dénommé processus fenêtre X_t(•) où X_t(y) = X_{t+y}, y ∈ [-τ,0]. Soit T>0. Si X est un processus dont la variation quadratique vaut [X]_t = t et h = H(X_T(•)) où H:C([-T,0])→ R est une fonction de classe C^3 Fréchet par rapport à L^2([-T,0] ou H dépend d'un numéro fini d' intégrales de Wiener, il est possible de représenter h comme un nombre réel H_0 plus une intégrale progressive du type \int_0^T \xi d^-X où \xi est un processus donné explicitement. Ce résultat de répresentation de la variable aléatoire h sera lié strictement à une fonction u:[0,T] x C([-T,0])→R qui en général est une solution d'une equation au derivées partielles en dimension infinie ayant la proprieté H_0=u(0, X_0(•)), \xi_t=Du(t, X_t(•))({0}). A certains égards, ceci généralise la formule de Clark-Ocone valable lorsque X est un mouvement brownien standard W. Une des motivations vient de la théorie de la couverture d'options lorsque le prix de l'actif soujacent n'est pas une semimartingale.

Joe Louis Clark was the principal of Eastside High School (EHS) located in Paterson, New Jersey from 1982 to 1989. The purpose of this phenomenological case study was to explore Mr. Clark’s leadership style as principal of EHS, and to investigate from the point of view of Mr. Clark’s former students, teachers, and administrators what, if any effect, his leadership style had at EHS, as well as on his students, teachers, and administrators’ lives during and subsequent to their time at EHS. I conducted this investigation by giving voice to my classmates, teachers, administrators and myself. I graduated from EHS during Mr. Clark’s tenure and I am a member of his first graduating class in 1986. When Mr. Clark arrived as principal, EHS was characterized by large numbers of students living at or below the poverty line, overcrowded classrooms, and outdated resources. Additionally, there were issues such as: high dropout rates, drugs, teenage pregnancy, violence towards students and teachers. In an attempt to raise the students’ Minimum Basic Skills Test scores and eliminate the violence at EHS, Mr. Clark was hired as the principal. Through face-to-face and telephone semi-structured, open ended in-depth interviews with twenty-two participants, I uncovered personal views of Mr. Clark’s leadership style. Mr. Clark used a leadership style that was characterized by the informants as autocratic, directive, charismatic and caring. The voices of his students, teachers, and administrators speak volumes about the strategies he developed that made an impact on their lives in addition to reforming EHS.

Fort Clatsop National Memorial is a unit of the National Park Service in Clatsop County, Oregon. The memorial was established by an Act of Congress in 1958 to commemorate the culmination and 1805-1806 winter encampment of the Lewis and Clark Expedition. The memorial centers around a replicated fort structure. The purpose of this thesis is to examine the process of preserving historic sites under the National Park Service (NPS) by examining the history of Fort Clatsop National Memorial. Through this examination it is possible to understand the realities of the national preservation system and the ideals fostered by those involved in the system. The Fort Clatsop site became the subject of folk history in Clatsop County, which culminated in a community movement for national recognition. During the community sponsored l 50th anniversary celebration of the Expedition, local civic groups built the existing fort replica. The management needs of the replica caused the site owner, the Oregon Historical Society (OHS), to actively pursue national recognition. To achieve the creation of a national memorial, OHS and community members enlisted the help of Senator Richard L. Neuberger. Senator Neuberger drafted and successfully sponsored legislation for the creation of the memorial. Since the memorial's creation in '1958, the site has been under the management of the National Park Service (NPS). As a historical, commemorative unit, the NPS is responsible under the 193 5 Historic Sites Act for presenting the history of the Expedition to the public. Such historic interpretation includes the use of costumed demonstrations, exhibits, and other interpretive media. Fort Clatsop also represents the ideals of education and inspiration in NPS interpretive policies. In conclusion, the examination of Fort Clatsop illustrates factors involved in the creation of historic sites within the NPS and how private individuals and Congress affect the selection of historic sites for preservation. While illustrating how the private sector and Congress can decide what historic sites are preserved under the park system, this examination also illustrates how the park system handles those sites placed under its management and how NPS management helps shape public memory.

La constatation que les prix des actifs boursiers sautent brusquement a conduit à étudier des modèles de marchés avec sauts. Cette thèse va dans cette direction. On y considère des marchés dirigés par des martingales normales qui ont la propriété de représentation chaotique: les martingales vérifiant une équation de structure déterministe, la martingale d'Azéma, etc. On trouve des stratégies de couverture pour les options européennes, asiatiques et Lookback soit par la formule d'Itô, soit par la formule de Clark-Ocone selon la plus appropriée. L'application du calcul de Malliavin au calcul des Greeks est traitée pour les options asiatiques dans le cas d'un marché dirigé par un processus de Poisson. On traite aussi de couverture dans un modèle à volatilité stochastique avec sauts où le prix de l'actif risqué est dirigé par un processus somme d'un mouvement brownien et d'un processus de Poisson 2-dimensionnels. Le marché est incomplet et il existe une infinité de mesures martingales équivalentes. On minimise l'entropie pour choisir telle mesure. Sous celle-ci on calcule la stratégie minimisant la variance.

<p>Pancreatic β-cells sense the concentration of glucose in the systemic circulation through metabolism of the sugar molecule. Failure to correlate the blood sugar concentration to an appropriate metabolic signal disrupts the function of the β-cell as a controller of glucose homeostasis and may contribute to the development of type 2 diabetes mellitus. Release of insulin is pulsatile and this thesis presents data that support that metabolism drives such pulsatile release. It is also found that increase in insulin release in response to elevation of the glucose concentration is only seen when the rise in glucose induces a prompt and sustained increase in mitochondrial metabolism. Such activation of mitochondrial metabolism depended on the metabolic state of the β-cell prior to the glucose challenge. In this context, prolonged periods of elevated levels of fatty acids are harmful to the pancreatic β-cell. To study the protein expression changes induced by fatty acids a protocol for islet protein profiling and identification of differently expressed proteins were developed. By using this protocol it was discovered that oleate decreased the cellular level of the chaperone peptidyl-prolyl isomerase B. The protocol was also used to study protein expression in islets obtained from mice fed a high-fat and/or a high-sucrose diet. Excess of glucocorticoids in the systemic circulation also cause a diabetic phenotype. Tissue response to glucocorticoids is regulated by the intracellular concentration of the active form of glucocorticoids, which is formed from the inactive form by the enzyme 11β-hydroxysteroid dehydrogenase type 1. It was found that pancreatic islets produce 11β-HSD1 protein in relation to substrate availability and that the amount of islet 11β-HSD1 protein was negatively correlated with insulin secretion.</p>

Pancreatic β-cells sense the concentration of glucose in the systemic circulation through metabolism of the sugar molecule. Failure to correlate the blood sugar concentration to an appropriate metabolic signal disrupts the function of the β-cell as a controller of glucose homeostasis and may contribute to the development of type 2 diabetes mellitus. Release of insulin is pulsatile and this thesis presents data that support that metabolism drives such pulsatile release. It is also found that increase in insulin release in response to elevation of the glucose concentration is only seen when the rise in glucose induces a prompt and sustained increase in mitochondrial metabolism. Such activation of mitochondrial metabolism depended on the metabolic state of the β-cell prior to the glucose challenge. In this context, prolonged periods of elevated levels of fatty acids are harmful to the pancreatic β-cell. To study the protein expression changes induced by fatty acids a protocol for islet protein profiling and identification of differently expressed proteins were developed. By using this protocol it was discovered that oleate decreased the cellular level of the chaperone peptidyl-prolyl isomerase B. The protocol was also used to study protein expression in islets obtained from mice fed a high-fat and/or a high-sucrose diet. Excess of glucocorticoids in the systemic circulation also cause a diabetic phenotype. Tissue response to glucocorticoids is regulated by the intracellular concentration of the active form of glucocorticoids, which is formed from the inactive form by the enzyme 11β-hydroxysteroid dehydrogenase type 1. It was found that pancreatic islets produce 11β-HSD1 protein in relation to substrate availability and that the amount of islet 11β-HSD1 protein was negatively correlated with insulin secretion.

Joe Louis Clark was the principal of Eastside High School (EHS) located in Paterson, New Jersey from 1982 to 1989. The purpose of this phenomenological case study was to explore Mr. Clark’s leadership style as principal of EHS, and to investigate from the point of view of Mr. Clark’s former students, teachers, and administrators what, if any effect, his leadership style had at EHS, as well as on his students, teachers, and administrators’ lives during and subsequent to their time at EHS. I conducted this investigation by giving voice to my classmates, teachers, administrators and myself. I graduated from EHS during Mr. Clark’s tenure and I am a member of his first graduating class in 1986. When Mr. Clark arrived as principal, EHS was characterized by large numbers of students living at or below the poverty line, overcrowded classrooms, and outdated resources. Additionally, there were issues such as: high dropout rates, drugs, teenage pregnancy, violence towards students and teachers. In an attempt to raise the students’ Minimum Basic Skills Test scores and eliminate the violence at EHS, Mr. Clark was hired as the principal. Through face-to-face and telephone semi-structured, open ended in-depth interviews with twenty-two participants, I uncovered personal views of Mr. Clark’s leadership style. Mr. Clark used a leadership style that was characterized by the informants as autocratic, directive, charismatic and caring. The voices of his students, teachers, and administrators speak volumes about the strategies he developed that made an impact on their lives in addition to reforming EHS.

E. Mervyn Taylor (1906-1964) was a pakeha artist whose prints drew influence from Maori culture and motif. He was one of a small number of artists who developed interest in Maori culture during the 1940s and 1950s. He expanded interest into detailed study of Maori culture, and interaction with Maori, and produced a significant body of prints on this subject during his career. Taylor's prints were acclaimed during his lifetime, but in the decades after his death, his reputation faded to the extent that he became relatively obscure. This persisted until the late 1980s, when art historical reassessment of his work began. This thesis forms a part of this continued re-evaluation. It focuses on Taylor's prints on Maori subjects, an area not sufficiently scrutinised in an academic context. It aims to reach deeper understanding of his prints through historical analysis of the factors that influenced him to choose Maori, and their culture as subjects for his artwork. The thesis also examines why Taylor's reputation was so emphatically based on his New Zealand heritage, as well as the quality of his craftsmanship, his beliefs about which formed the foundation of his philosophy. Nationalist and regionalist notions also figured in his aesthetic ideals. His prints are also placed in relation to the modern debate over cultural appropriation in art. Greater recognition and understanding of Taylor's oeuvre may be achieved by establishing why he chose Maori subjects, and what specific features they contributed to the character of his work.

Thesis (M.A.)--University of Tennessee, 2007. / Title from title page screen (viewed on Mar. 31, 2008). Thesis advisor: Michael L. Keene. Vita. Includes bibliographical references.