Ce travail porte sur la mise en œuvre de simulations sur des pales de machines tournantes. Une première partie de la thèse porte sur l’amélioration des performances du couplage fluide-structure. Des nouveaux algorithmes sont présentés. Une nouvelle méthode de déformation de maillage est évaluée. Les développements sont validés à partir de plusieurs cas tests. La deuxième partie porte sur l’application des avancées à des machines tournantes. Une première validation est faite sur une hydrolienne. La vibration d’une pale au passage du mat est étudiée. Enfin, des résultats sur une hydrolienne industrielle sont exposés. / A methodology to simulate blades of turbines is developed. A first part is dedicated to improving the performance of the fluid-structure coupling. New algorithms are presented. A new mesh morphing solution is shown. Developments are validated on many test cases. A second part is dedicated to applying the developments on turbines. A first validation is made on a water turbine. The vibration of a blade interacting with a mast is studied. Finally, some results of an industrial water turbine are shown.

A presente pesquisa versa sobre a construção de uma análise histórica e tipológica do Forte São João, arquitetura militar construída na entrada do canal da cidade de Bertioga, no Estado de São Paulo. Além das questões que envolvem o interesse na construção de uma pesquisa em história da arquitetura, outro fator torna-se relevante para a investigação: o efetivo valor dessa construção para a história e para a arte colonial brasileira, tendo em vista o tombamento federal desse monumento nos anos 40, pelo Serviço do Patrimônio Histórico e Artístico Nacional. / The present study aim to investigate the typological and historic analyze about Fort of São João, a military architecture constructed in the entrance of canal of Bertioga city, in São Paulo state. Furthermore, an important question was approached here: the effective value of this revision for brazilian colonial art and history, considering her federal protection in the fourthies, from Artistic and Historic National Service (SPHAN).

Sanguinet was one of the most important early architects in Texas. His partnership with Arthur and Howard Messer was responsible for the development of Arlington Heights, a prominent resort community. With partner Carl Staats and later partner Wyatt Hedrick, Marshall Robert Sanguinet designed most of the early towers of the Fort Worth central business district. In addition, the firm also designed residences, churches, educational facilities, courthouses, and club buildings in Fort Worth as well as in Dallas, Houston, San Antonio, and Wichita Falls, where branch offices are located.

This is a study of the drafting curriculum in the Fort Worth public high schools, Fort Worth, Texas.The specific purposes or the study were as follows: 1. To review and compare the courses and content of the drafting curriculums listed in the bulletins of the TEA and the Fort Worth Public Schools. 2. To study drafting scheduling procedures in each of the Fort Worth public high schools. 3. To study the courses and contents of the drafting curriculums offered in each of the Fort Worth public high schools. 4. To determine if there are variations from school to school in curriculum content of the drafting courses in each of the Fort Worth public high schools. 5. To offer suggestions and recommendations for improving the program, if weaknesses were evident, when the program was evaluated by acceptable criteria (12, 13, and 14).

This study traced the development of the Equity 2000 Program in the Fort Worth Independent School District from its inception in 1990 to its sixth and final year as an exemplary program for equal access to higher education for minority and underserved youth. Program components included mathematics, counseling, staff development, academic enrichment activities, parent education and higher education linkages. Both primary and secondary sources were evaluated from the perspectives of internal and external criticism. The following conclusions were reached: 1) District policy must change if minority students are going to access algebra and geometry. 2) The lack of involvement of other curriculum areas created primarily a mathematics inservice program. 3) Required inservice was necessary to provide improved and more effective campus and district results. 4) The precollege guidance and counseling component needed integration with the mathematics component. 5) Lack of principals' involvement in the early development of the program contributed to uneven administrative support. 6) There was no definitive strategy for parental inclusion. 7) Funding sources were inadequate to fully implement all parts of the program. 8) There was limited participation of local institutions of higher education. 9) There was a lack of an ongoing, structured evaluation process to document the program's effectiveness. 10) Attitudes and perceptions of minority students and their parents about success in higher level mathematics courses can change over time. 11) The program was costly with limited documentation of the results. 12) Much of the training provided mathematics teachers and guidance counselors should be preservice instruction. The researcher made the following recommendations: conduct a historical study at each Equity site; continue the Summer Mathematics and Guidance Institutes; continue the Saturday Academy and the Algebra/Geometry Readiness Academies; provide outreach efforts to parents; provide precollege information to students and their parents; and provide related teacher and counselor preservice training.

L’émergence des technologies de communication satellite et radar toujours en pleine essor nécessite des composants de puissance hyperfréquence de plus en plus compacts permettant d’intégrer sur une seule puce des fonctions analogiques/numériques, tout en réduisant le coût de fabrication. Dans ce contexte, le transistor bipolaire à hétérojonction HBT constitue un composant de choix afin d'améliorer les performances des transistors de puissance sur silicium pour les applications hyperfréquences en association avec la technologie CMOS. Ainsi, cette étude est dédiée à la caractérisation et la modélisation non linéaire de ces dispositifs actifs. Dans ce but, un banc de mesures non linéaires et un modèle prédictif grand signal ont été développés jusqu’à 50 GHz. Dans un premier temps, le banc de mesures non linéaires a été mis en œuvre autour du NVNA en configuration load-pull mesurant dans le domaine fréquentiel vis à vis du LSNA mesurant dans le domaine temporel. Cette configuration instrumentale associée à la dynamique du NVNA met en avant ses avantages et inconvénients. Par la suite, une procédure d’extraction pour l’élaboration d’un modèle électrique grand signal a été validée en régimes statique et dynamique. L’originalité de ce modèle prédictif est la procédure d’extraction ainsi que la mise en œuvre rapide s’appuyant sur les formules analytiques physiques des semiconducteurs. Les étapes d’extraction se sont avérées très efficaces lors des confrontations avec les données expérimentales du dispositif sous test dans les mêmes conditions de polarisation et d’impédances de charge. Nous avons alors mis en évidence l’impact des courants thermiques sur les performances en puissance hyperfréquence des transistors bipolaires dans les domaines temporel et fréquentiel. / The emergence of satellite communications and radar technologies always require more compact microwave power devices for integration of analog/digital operations on a single chip, reducing the manufacturing cost. As an exemple, since many years heterojunction bipolar transistor (HBT) permits to improve the silicon power transistor performances for microwave applications associated with CMOS technology. In this context, this work focuses on the characterization and modeling of these active devices. For this goal, a non linear bench and a large signal model are developed up to 50 GHz. On the first step, the non-linear measurement is carried out using the NVNA for load-pull measurements on the frequency domain and results are compared with those obtained from the LSNA on the time domain. This instrumental configuration associated with the dynamic operating capabilities of NVNA highlights its advantages and disadvantages. Subsequently, a SiGe HBT device extraction parameters procedure has been validated to establish a large signal model. The originality of this last one is its predictive extraction procedure and fast implementation based on the semiconductors analytical equations. Extraction steps are proven very effective in confrontations with the experimental data of the device under test with the same biases and for different load impedances. At last, thermal currents impacts on microwave power performance are discussed in time and frequency domains.

Urban landscapes are quickly replacing native habitat around the world. As wildlife and people increasingly overlap in their shared space and resources, so does the potential for human-wildlife conflict, especially with predators. Bobcats (Lynx rufus) are a top predator in several urban areas across the United States and a potential contributor to human-carnivore conflicts. This study evaluated the movements and habitat use of bobcats in the Dallas-Fort Worth (DFW), Texas metroplex. Spatial data were collected from 10 bobcats via Global Positioning Satellite (GPS) for approximately one year. Average home range size was 4.60 km2 (n=9, SE=0.99 km2) for all resident bobcats, 3.48 km2 (n=5, SE=1.13 km2) for resident females, and 6.00 km2 (n=4, SE=1.61 km2) for resident males. Resource selection function (RSF) models show that bobcats avoid areas close to and far from grasslands and low-medium development, while selecting for these areas at intermediate distances. Bobcats also selected areas closer to developed open space, agricultural areas, and railroads. In addition, camera trap data analyzed with spatially explicit capture-recapture (SECR) models informed by the RSF results estimated a population density of 0.64 bobcats/km2 (SE = 0.22). Bobcats in DFW have significantly smaller home ranges and occur at higher densities compared to rural bobcat populations. Home ranges were also slightly smaller and densities higher than the most closely similar peri-urban bobcat studies. These differences likely arise due to the abundant urban prey species the DFW landscape provides despite limited space and habitat for bobcats. The dense urban development surrounding this population of bobcats may also discourage dispersing from the area, and contributing to higher densities. These results provide information to facilitate management of urban bobcats by providing new insight into how bobcats live amidst people in urban areas.

Mullet Key is a right angle barrier island located at the mouth of Tampa Bay, west-central Florida. Based on historical shoreline data from 1873, the Gulf (west)-facing section of the beach has been dynamic illustrating large beach advances and retreats of up to 500 m on a decadal scale, while the south (channel)-facing section of the beach has shown to maintain a stable shoreline. This study focuses on the morphodynamics of the Gulf-facing beach. Since the 1920s, most of the Gulf-facing beach has been accreting except at the southern end near the Tampa Bay main channel. However, over the past 17 years, severe beach erosion has occurred along the northern portion of the island while accretion occurred along the middle portion. The southern end of the island has been maintained through artificial beach nourishments. Analysis of 27 aerial images from 1942 to 2014 revealed that the above large shoreline variations can be explained by the initiation, emergence, landward migrating, shoreline attachment, and post-attachment beach adjustment of the swash-bar complex on the Bunces Pass ebb delta. Two cycles of the swash-bar complex attachments with a period of approximately 30 years were identified from the aerial photos spanning 72 years. Twenty-eight beach-profiles spanning the 4 km Mullet Key Gulf-facing beach were surveyed 7 times on a bi-monthly basis from March 2014 to February 2015 to quantify the recent rapid changes, and to assess a yearly rate of shoreline change. Beach-profile analyses showed that the 120 m beach at the north-most tip in the immediate vicinity of Bunces Pass has lost a small amount of sediment. The 360 m beach to the south has gained some sediment. The 670 m stretch of beach further south has had significant shoreline retreat at a rate of 10-15 m/year. The 2,400 m section southward has experienced some gain of sediment, while the 370 m nourished beach at the southernmost tip has had slight retreat. This beach change pattern illustrates a diverging longshore sediment transport. Nearshore wave and current conditions were measured during a cold front passage in December 2014 to quantify the hydrodynamic processes that induced the diverging longshore transport. Three wave and current gauges were deployed along the eroding and accreting sections. The hydrodynamic data reveal that the longshore transport divergence is caused by diverging flood tidal flow into Bunces Pass to the north and Tampa Bay channel to the south. Furthermore, the waves in front the eroding beach were higher than the adjacent accreting beach.

This research describes a large, newly-recorded archaeological site in the Upper Apalachicola River valley, northwest Florida, and a private collection of artifacts from it, as well as test excavations, three-dimensional modeling, clay/pottery sourcing through chemical analysis, and direct radiocarbon dating of ceramics to relate the site with regional archaeological chronologies and settlement patterns. A University of South Florida (USF) 2013 field school conducted excavations at the multicomponent midden on the western floodplain of the Apalachicola River called the McKinnie site (8JA1869). Students collaborated with a local collector and family members to learn about the site's history. Data from the collection and excavations show that the site was inhabited through four thousand years of prehistory, serving as a rich seasonal resource base for local people in the area starting in the Middle Archaic Period, and as a small place of occupation during the Woodland Period, until people moved out into the river valley to live in farming villages. We also investigated a series of fascinating features, stored in the private collection and excavated by USF, which may have been intentionally buried at the site up to 5500 years ago. They may be evidence of some ancient ochre processing to obtain pigments, or some other special activity.

L'objectif de cette thèse est de caractériser expérimentalement l'influence du degré de saturation et du rapport eau/ciment du béton sur son comportement sous fort confinement. Cette thèse s'inscrit dans le cadre plus général de la maîtrise du comportement du béton sous sollicitations sévères (explosions en champ proche ou impacts balistiques). Une explosion en champ proche ou un impact sur une structure en béton génère des niveaux de contrainte très élevés associés à des chemins de sollicitation complexes dans le matériau béton. Pour valider les modèles de comportement, des résultats expérimentaux sont nécessaires. Le travail présenté dans ce mémoire concerne des essais réalisés grâce à une presse triaxiale statique permettant d'atteindre des niveaux de contrainte de l'ordre du giga Pascal. Le caractère poreux du béton et le fort confinement ont nécessité d'une part, la mise au point d'un dispositif de protection du matériau, et d'autre part, la mise au point d'une instrumentation par jauges de déformation, ce qui est inédit pour de tels confinements. Des essais hydrostatiques et triaxiaux, réalisés d'une part sur des matériaux modèles et d'autre part sur du béton, ont permis de valider les procédures expérimentales développées ainsi que les techniques de mesures des déformations et des contraintes. Les études concernant l'influence du degré de saturation et du rapport eau/ciment du béton sur son comportement ont nécessité la formulation d'un béton ordinaire de référence et de deux bétons modifiés possédant des rapports eau/ciment différents. <br />L'analyse des essais triaxiaux effectués sur le béton de référence montre que le degré de saturation du béton a une influence majeure sur son comportement statique sous fort confinement. Cette influence se remarque particulièrement sur la capacité de chargement du béton et sur la forme de la courbe des états limites pour des degrés de saturation supérieurs à 50%. La capacité de chargement du béton augmente avec la pression de confinement pour des essais sur du béton sec tandis qu'au-delà d'une pression de confinement donnée, elle reste limitée pour du béton humide ou saturé. Les modes de rupture du béton se présentent sous forme de bandes de localisation. L'inclinaison de ces bandes évolue avec le niveau de contrainte atteint dans le matériau et s'oriente perpendiculaire à la direction axiale lorsque ce niveau devient important. <br />L'analyse des essais triaxiaux réalisés sur les bétons possédant des rapports eau/ciment différents met en évidence que sous faible confinement, le comportement du béton est gouverné par la résistance de la matrice cimentaire. Sous fort confinement, le béton se comporte comme un empilement granulaire sans aucune influence de la résistance de la matrice cimentaire. Ainsi la courbe d'états limites et les modes de rupture du béton sont sensibles à son rapport eau/ciment pour de faibles niveaux de confinement mais insensibles à ce paramètre au-delà une contrainte moyenne critique.