Les premières civilisations péruviennes se sont épanouies pendant la période dite « formative » entre 2500 av. J.-C. et le début de notre ère. Les connaissances actuelles sur le Formatif et les cultures Cupisnique ou Chavín ont été largement influencées par les théories évolutionnistes et diffusionnistes héritées du XIXe siècle. Ce travail de recherche répond à la nécessité d’opérer une synthèse réactualisée de cette période mal connue et de redéfinir le premier horizon culturel communément appelé Chavín. D’une part, cette étude propose un cadre chronologique fondé sur la réévaluation systématique des séquences chrono-culturelles de l’ensemble des sites archéologiques occupés à cette époque. Elle établit une périodisation du Formatif et détermine les principaux groupes culturels qui caractérisent ses différentes étapes. D’autre part, ce travail apporte une réflexion épistémologique sur les concepts Cupisnique et Chavín. L’Horizon Chavín, traditionnellement défini comme le résultat de la diffusion stylistique de l’art religieux de Chavín de Huántar, est ici réinterprété au regard des données récentes de la recherche archéologique et d’une analyse approfondie des données chronologiques et culturelles des centres cérémoniels les plus importants. Cette étude précise enfin le rôle majeur que les sites de tradition culturelle Cupisnique et le temple de Chavín de Huántar ont joué dans l’élaboration et la mise en place de concepts religieux communs transcrits dans une écriture iconographique codifiée. / Early Peruvian civilisations were flourishing during the period called « Formative » between 2500 BC and the beginning of our era. The current knowledge of Formative and Cupisnique or Chavín cultures has been considerably influenced by evolutionist and diffusionist theories inherited from the nineteenth century. This research attempts to meet the necessity of realising an updated synthesis of this almost unknown period and to redefine the first cultural horizon usually called Chavín. On the one hand, this study proposes a chronological frame based on systematic revaluation of the chrono-cultural sequences of all the archaeological sites of this period. It sets out a chronology of the Formative cultures and determines the main cultural groups which characterise its different stages.On the other hand, this work offers an epistemological thought on Cupisnique and Chavín cultures. Chavín Horizon, traditionally defined as the result of the stylistic diffusion of Chavín de Huántar religious art is re-interpreted in the light of recent archaeological data collected in the main ceremonial centers. Finally, this dissertation makes clear the major role that Cupisnique sites and Chavín de Huántar temple have had in the creation and the development of shared religious concepts transcribed in a codified iconographic writing.

Les horizons sont des éléments indispensables à la création d’un modèle structural pour l’exploration d’hydrocarbures. Ces horizons peuvent avoir des formes complexes, les rendant difficiles voire impossibles à manipuler par les logiciels d’exploration. La gestion de ces horizons “multivalués” dans l’interprétation structural passe par deux axes de travail. Il faut premièrement trouver un modèle pour les représenter. Un état de l’art des modèles de données et un programme de comparaison automatique montrent ainsi comment les systèmes de patch et les surfaces triangulées sont les plus adaptés pour représenter les horizons avec failles inverses et les dômes de sel, respectivement. Dans un second temps, il faut pouvoir reconstruire les surfaces de ces horizons multivalués à partir de données d’interprétation, qui sont à la fois peu denses et non-uniformément distribuées. Nous proposons deux algorithmes de reconstruction, un pour chaque type d’horizon. Ces méthodes sont basées sur les approches classiques en géoscience, et forment donc une extension naturelle de l’état de l’art. Avec ces modèles et leurs méthodes de reconstruction, la gestion des horizons multivalués est désormais possible et pratique, permettant de considérer des champs plus complexes / Horizons are first-class elements of the structural models used for Oil & Gasexploration. When they have a complex shape, they become difficult or even outright impossibleto manage within typical software packages. Handling those so-called “multivalued”horizons indeed requires tackling two problems. First, data models must be found to representthem. A review of the state of the art, complemented by a benchmark, led us to promotethe use of patch systems and triangulated surfaces in order to represent reverse-faulted horizonsand salt domes, respectively. Second, multivalued surfaces must be reconstructed fromsparse and non-uniformly distributed interpretation data. We developed two reconstructionmethods, each targeting a multivalued horizon type. They are based on standard geoscienceinterpolation methods, making them both fast and natural extensions of the state of the art.Using the proposed models along with the reconstruction methods, it is now possible to efficientlytackle the more complex fields were they are typically found.

Cette thèse interroge les relations entre l’architecture et l’horizon et montre qu’elles engagent la notion philosophique d’habiter. Au travers du prisme de l’horizon, l’objectif est de repenser les limites des pratiques des architectes, de saisir leur sens et de mesurer la responsabilité des professionnels qui participent à la transformation des milieux habitables. Au tournant de la modernité, l’étude de l’horizon chez Le Corbusier, Claude Parent, Henri Gaudin, Álvaro Siza, Pierre-Louis Faloci et Marc Barani, éclaire des évolutions dans les modes de voir et de penser le monde, de la première moitié du 20e siècle à nos jours. Des récits d’expériences vécues au sein d’architectures construites sont confrontés à des entretiens menés avec les architectes ainsi qu’à l’analyse de leurs écrits, dessins, plans et/ou archives. Tour à tour, l’horizon, l’architecture et l’habiter sont mis à l’épreuve. Au premier abord, l’horizon évoque la limite visuelle lointaine du paysage. Mis à l’épreuve de l’architecture, il se révèle aussi comme limite spatio-temporelle et corporelle, qui concerne la relation sensible et existentielle entre l’homme, l’architecture et le paysage. À l’épreuve de l’horizon, l’analyse des pratiques et des expériences des architectes démontre une pluralité de modes de dire et de faire. Comme prisme de lecture, l’horizon traduit le sens des actions et des pensées de ces professionnels. Au travers de leurs invitations à « habiter l’horizon », les architectes témoignent d’un changement de paradigme à l’œuvre depuis Le Corbusier. L’ouverture et le rythme entre l’architecture, l’homme et l’horizon s’imposent finalement comme les conditions d’un habiter possible. / This thesis examines the relationships between architecture and horizon, and show that they are committed with the philosophical notion of dwelling. Through the lens of horizon, the purpose is to grasp architect’s practices, to rethink their limits and to measure the responsibility of the professionals who are involved in the transformation of places where people can live. At the turn of modernity, the study of horizon by Le Corbusier, Claude Parent, Henri Gaudin, Álvaro Siza, Pierre-Louis Faloci et Marc Barani, sheds light on changes of ways of seeing and thinking the world, from the first half of the 20th century to the present day. Accounts of experiences within built architectures face interviews conducted with architects and the analysis of their written materials, drawings, blueprints and, or, records. Horizon, architecture and the place we live in, in turn, are tested. At first sight, the horizon calls to mind the far visual boundary of the landscape. Put to the test of architecture, it also proves to be a physical spatial and temporal boundary which concerns the sensitive and existential relationship between humans, architecture and landscape. Put to the test of horizon, the analysis of the architects’ practices and experiences show a plurality of ways of saying and doing. As a reading prism, the horizon expresses the sense of the actions and the thought of these professionals. Through their propositions to “dwelling the horizon”, architects reveal a paradigm shift operating since Le Corbusier. The openness and the rhythm between architecture, human and horizon turn out to be the conditions of a dwelling possibility.

This dissertation contains three applications of time series in finance and macroeconomics. The first essay compares the cumulative returns for stocks and bonds at investment horizons from one to ten years by using a test for spatial dominance. Spatial dominance is a variation of stochastic dominance for nonstationary variables. The results suggest that for investment horizons of one year, bonds spatially dominate stocks. In contrast, for investment horizons longer than five years, stocks spatially dominate bonds. This result is consistent with the advice given by practitioners to long term investors of allocating a higher proportion of stocks in their portfolio decisions. The second essay presents a method that allows testing of whether or not an asset stochastically dominates the other when the time horizon is uncertain. In this setup, the expected utility depends on the distribution of the value of the asset as well as the distribution of the time horizon, which together form the weighted spatial distribution. The testing procedure is based on the Kolmogorov Smirnov distance between the empirical weighted spatial distributions. An empirical application is presented assuming that the event of exit time follows an independent Poisson process with constant intensity. The last essay applies a dynamic factor model to generate out-of-sample forecasts for the inflation rate in Mexico. Factor models are useful to summarize the information contained in large datasets. We evaluate the role of using a wide range of macroeconomic variables to forecast inflation, with particular interest on the importance of using the consumer price index disaggregated data. The data set contains 54 macroeconomic series and 243 consumer price subcomponents from 1988 to 2008. The results indicate that factor models outperform the benchmark autoregressive model at horizons of one, two, four and six quarters. It is also found that using disaggregated price data improves forecasting performance.

In recent years, the accumulation of space debris has become an increasingly pressing issue, and adequately monitoring it is a formidable task for designated ground-based sensors. Supplementing the capabilities of these ground-based networks with orbiting sensing platforms would dramatically enhance the ability of such systems to detect, track, identify, and characterize resident space objects -- the primary goals of modern space situational awareness (SSA). Space-based space situational awareness (SBSSA), then, is concerned with achieving the stated SSA goals through coordinated orbiting sensing platforms. To facilitate the design of satellite constellations that promote SSA goals, an optimization approach is selected, which inherently requires a pre-defined mathematical representation of a cost index or measure of merit. Such representations are often analytically available, but when considering optimal constellation design for SBSSA applications, a closed-form expression for the cost index is only available under certain assumptions. The present study focuses on a subset of cases that admit exact representations. In this case, geometrical arguments are employed to establish an analytical formulation for the coverage area provided as well as for the coverage multiplicity. These analytical results are essential in validating numerical approximations that are able to simulate more complex configurations. / text

A longstanding problem in mathematics education has been to determine the knowledge that teachers need in order to teach mathematics effectively. It is generally agreed that teachers need a more advanced knowledge of the mathematical content that they are teaching. That is, teachers must know more about the content that they are teaching than their students and also know more than simply how to "do the math" at a particular grade level. At the same time, research does not clearly indicate what advanced mathematical knowledge (AMK) is useful in teaching or how it can be developed and identified in teachers. In particular, the potential AMK that is useful for teaching is too vast to be enumerated and may involve a great deal of tacit knowledge, which might be difficult to detect through observations of practice alone. In the last decade, researchers have identified that teaching practice entails a specialized knowledge of mathematics but the role of advanced mathematical knowledge in teaching practice remains unclear. However, the construct of horizon content knowledge (HCK) has emerged in the literature as a promising tool for characterizing AMK as it relates specifically to teaching practice. I propose an operationalization of HCK and then use that as a lens for analyzing the knowledge resources that a fourth and fifth grade teacher draw on in their encounters with the mathematical horizon. The analysis identifies what factors contribute to teachers' encounters with the horizon, characterizes the knowledge resources, or HCK, that teachers draw on to make sense of mathematics they engage with during their horizon encounters, and explores how HCK affords and constrains teachers' ability to navigate mathematical territory. My findings suggest that experienced teachers' HCK includes a situated, professional teaching knowledge that, while sometimes non-mathematical in nature, informs their understanding of mathematical content and teaching decisions. This professional teaching knowledge guides how teachers use and generate mathematical structures that sometimes align with established mathematical structures and in other cases do not. These findings have implications regarding the way in which the development of AMK is approached relative to teacher education, ongoing professional development, and curriculum design.

In this thesis we discuss drawbacks of the event horizon which is defined glo- bally in spacetime and we introduce a quasilocal definition of black hole boundary foliated by marginally trapped surfaces on which the expansion of the outer null normal congruence becomes zero. List of different types of quasilocal horizons follows, i.e. apparent horizon, trapping horizon and isolated and dynamical hori- zon. Subsequently we calculate and analyse quasilocal horizons in two dynamical spacetimes which are used as inhomogeneous cosmological models. We discover future and past horizon in spherically symmetric Lemaître spacetime and we come to conclusion that both are null and have locally the same geometry as the ho- rizons in the LTB spacetime. Then we study Szekeres-Szafron spacetime with no symmetries, particularly its subfamily with β,z ̸= 0, and we derive the equation of the horizon. However, because of the lack of symmetries the spacetime is not adapted to double-null foliation, therefore we were unsuccessful in our attempts to estimate the equation's solution. Only in a special case when the function Φ does not depend on the coordinate z we found a condition on the existence of the horizon, that is Φ,t Φ > 0. 1

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / During the cold war, undersea warfare (USW) was perceived as a large-area, deep-water operation. The need for USW has recently shifted to the shallow water, littoral environment. Consequently, US naval forces must train to operate in these littoral environments where regional conflicts are most likely to occur. In light of these requirements the Shallow Water Training Range (SWTR) has been initiated. Telemetry is used in the following areas of SWTR: fiber optic, microwave, RF and underwater. Only phase 1 of 8 phases of the program is executing therefore SWTR is a good opportunity for telemetry industry involvement.

International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / The first airship was invented and designed in 1852 by Henri Giffard, a French engineer. Airships were used by both the Allied and German military for surveillance and bomb dropping in WWI. There was a steady increase in airship use up until the Hindenburg exploded while docking in 1937 at Lakehurst, New Jersey. This tragedy almost ended the use of airships. Significant use of airships next occurred during WWII for submarine surveillance and depth charging. Airships for advertising, surveillance, and command control came of age in the late 1980s and early 1990s. Airships can be fitted with several telemetry options or instrumented with sensor systems for surveillance purposes. The telemetry or sensor data can be relayed, real-time, to a remote station as much as 150 km from the airship either encrypted or plain when cruising at 3000 feet altitude. Small vehicles (3 meters long) can be detected at 50 km using radar; 12 km using FLIRs; and, depending on weather conditions and real-time imaging processing, up to 20 km using video cameras. Cooperating airborne targets can be tracked out to 150 km. The major advantages of the airship over conventional aircraft are: • ENDURANCE Up to 20 hours without refueling. • LOW OPERATING COST Less than the cost of a helicopter. • SHOCK-FREE ENVIRONMENT Allows commercial electric equipment usage. • VIBRATION-FREE ENVIRONMENT Yields personnel comfort and endurance. • SAFETY Safer than any aircraft, automobile, or bicycle.

In this thesis we investigate the quantum aspects of black holes near extremality. In particular we seek evidence that a near-extremal black hole has a microscopic description in terms of a two dimensional conformal field theory (CFT). We first demonstrate how the low temperature expansion of the first law of thermodynamics leads to an expression for the entropy of extremal black holes which can be recast as the Cardy formula for the entropy of a chiral two dimensional CFT, in agreement with the Extremal Black Hole/CFT correspondence. We apply Sen’s entropy function formalism to fortify this result by reproducing it in a gravitational setup. We extend our first law analysis to a class of near-Extremal Vanishing Horizon (near-EVH) black holes. These black holes have low entropy and temperature, and their geometries contain locally asymptotically AdS3 throats in the near horizon region. The low temperature expansion of the first law is compatible with the first law for a three dimensional BTZ black hole. As the BTZ black hole has an AdS/CFT description in terms of a non-chiral two dimensional CFT, our result can be viewed as thermodynamic evidence for the EVH/CFT correspondence, which states that gravity on the near horizon EVH geometry is described by a 2d CFT. A near-EVH black hole, or low energy excitation around an EVH black hole, is described by excitations of the dual 2d CFT. As case studies of our first law analysis and the EVH/CFT correspondence, we focus on two asymptotically AdS5× S5 classes of near-EVH black holes. The two cases have interesting individual properties and, by the AdS/CFT correspondence, dual descriptions as states in N = 4 super Yang-Mills theory . We can compare these (UV) pictures to the two dimensional descriptions that emerge from the near horizon, or low energy, dynamics. All EVH near horizon geometries have local AdS3 factors which become BTZ black holes when the configurations are excited from EVH to near-EVH. In the study of static black holes with three R-charges, we examine the non-BPS and near- BPS regimes separately. While the non-BPS near horizon limit is locally regular, in the near- BPS case the near horizon procedure requires focussing geometrically on a strip of the horizon, and the degrees of freedom of the dual CFT2 can be associated with stretched strings between giant gravitons in the transverse five-sphere. The near-EVH limit of non-BPS stationary charged black holes is obtained by taking the vanishing limit of one or both of the angular momenta. When one of the momenta is small, the AdS3 angle is a combination of azimuthal angles in the AdS5 and S5 regions of the geometry. Taking the vanishing limit of both of the angular momenta leads to a near horizon limit which contains a BTZ black hole that is non-trivially fibred by a three-sphere. For each of the case studies we use the AdS3/CFT2 dictionary to specify dual IR CFT2 descriptions of the black holes. We outline a map between the UV and IR near-EVH excitations and demonstrate how the first law reduces in the near-EVH limit to the first law of a BTZ black hole. As a consistency check we compare our results with those of the Kerr/CFT correspondence.