Persistence is a composition scored for piccolo, 2 flutes, 2 oboes, English horn, 2 bassoons, E-flat clarinet, 3 1st B-flat clarinets, 3 2nd B-flat clarinets, 3 3rd B-flat clarinets, bass clarinet, 2 E-flat alto saxophones, B-flat tenor saxophone, E-flat baritone saxophone, 3 B-flat trumpets, 4 French horns in F, 2 trombones, bass trombone, baritone, tuba, timpani, and 4 auxiliary percussionists. The music consists of three movements, fast-slow-fast, lasting approximately eleven and one-half minutes. The three movements last three minutes and twenty seconds, five minutes and thirty seconds, and three minutes and ten seconds respectively.

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The following document presents my dissertation composition. The work is written for eight performers, including flute, clarinet, saxophone, French horn, percussion, violin, viola, and Double Bass. The duration of the piece is approximately sixteen minutes, in a single movement. This composition explores forms of discontinuity within continuous textures, and includes particular theatrical and staging elements.

This study examines the dynamics and predictability of the mesoscale convective vortex (MCV) event of 10-13 June 2003 which occurred during the Bow Echo and Mesoscale Convective Vortex Experiment (BAMEX). The MCV formed from a preexisting upper-level disturbance over the southwest United States on 10 June and matured as it traveled northeastward. The BAMEX field campaign provided a relatively dense collection of upper air observations through dropsondes on 11 June during the mature stage of the vortex. While several previous studies have focused on analysis of the dynamics and thermodynamics of observed and simulated vortices, few have addressed the ability to predict MCVs using numerical models. This event is of particular interest to the study of MCV dynamics and predictability given the anomalously strong and long-lived nature of the circulation and the dense data set. The first part of this study explores the dynamics of this MCV through an in-depth analysis of data from the profiler network and BAMEX dropsonde observations, in addition to the conventional surface and sounding observations as well as radar and satellite images. Next, issues relating to model performance are addressed through anevaluation of two state-of-the-art mesoscale models with varying resolutions. It is determined that the ability of a forecast model to accurately predict this MCV event is directly related to its ability to simulate convection. It is also shown that the convective-resolving Weather Research and Forecast (WRF) model with horizontal grid increments of 4 km displays superior performance in its simulation of this MCV event. Finally, an ensemble of 20 forecasts using mesoscale model MM5 with horizontal grid increments of 10 km are employed to evaluate probabilistically the dynamics and predictability of the MCV through the examination of the ensemble spread as well as the correlations between different forecast variables among ensemble members. It is shown that after MCV development, the ensemble mean performs poorly while individual ensemble members with good forecasts of convection at all stages of the MCV also forecast the midlevel vortex well. Furthermore, correlations among ensemble members generally support the findings in the observational analysis and in previous literature.

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L’identité est un des concepts qui ne peuvent pas être contournés dans nos efforts pour appréhender la politique mondiale. Tout effort dans cette direction implique nécessairement une certaine conceptualisation de l’identité, une certaine vision de qui sont le Nous et les Autres et de comment ils se manifestent sur la scène politique internationale. Depuis sa création, la discipline des Relations Internationales a cependant marginalisé ou même exclu tout intérêt pour les questions et les enjeux reliés à l’identité, les qualifiant comme non pertinents pour l’étude de la politique internationale. C’est surtout après la fin de la Guerre froide que l’identité est revenue en force et que nous avons assisté à une ouverture de la discipline aux réflexions sur l’identité et sur ses relations avec l’altérité. L’objectif de cette recherche est d’analyser si le retour de l’identité en Relations Internationales a aussi conduit au dépassement des conceptualisations traditionnelles du vivre ensemble dans la discipline – conceptualisations qui, soit excluent la différence, soit l’ignorent complètement - pour offrir une nouvelle manière de définir et de « contenir » théoriquement la diversité au niveau mondial. Mon hypothèse de départ est que pour avoir un changement dans la conceptualisation du vivre ensemble dans la discipline des Relations Internationales, le retour de l’identité doit nécessairement impliquer une reconceptualisation autant de l’identité que des rapports de pouvoirs dans lesquels les identités sont imbriquées. À travers une analyse qualitative du discours sur l’identité développé par les auteurs qui ont contribué au retour de l’identité dans la discipline, je développe l’idée que le retour de l’identité en Relations Internationales n’a pas conduit à une reconceptualisation du vivre ensemble dans la discipline, soit parce que l’identité continue d’être appréhendée en termes essentialistes et totalisants, soit parce que les rapports de pouvoir qui s’établissent entre les identités sont négligés.

Ce mémoire vise à faire une synthèse sur la Schur positivité des différences de fonctions de Schur gauches. On cherche à voir la représentation de cet ensemble de fonctions à l'aide de la Schur positivité. Pour ce faire, on introduit premièrement les notions de base nécessaires à sa compréhension tel que les permutations, les partages, les diagrammes, les tableaux et les ensembles partiellement ordonnés. Ensuite une discussion sur l'algèbre graduée des fonctions symétriques s'impose puisque les fonctions de Schur forment une base des fonctions symétriques. On présente dans un deuxième temps certaines bases des fonctions symétriques. En fait, on voit la base des fonctions homogènes, la base des fonctions élémentaires et la base des fonctions monomiales. On voit par ailleurs la m-positivité qui est un autre ordre partiel semblable à la Schur positivité. En ce qui a trait aux fonctions de Schur gauches, on tente plus particulièrement de comprendre les égalités qui surviennent entre certaines fonctions de Schur gauches. On tente aussi de faire le point (en partie) sur les inégalités des coefficients de Littlewood-Richardson qui apparaissent lors d'un produit de fonctions de Schur ou lorsqu'on écrit les fonctions de Schur gauches en termes de fonctions de Schur. De plus, on veut trouver les seuls diagrammes gauches nécessaires à la représentation des ensembles partiellement ordonnés des fonctions de Schur gauches. Enfin, on vise à présenter certains ensembles partiellement ordonnés par la Schur positivité des fonctions de Schur gauches, de même qu'être en mesure de montrer l'existence d'un maximum d'arêtes liant les différents niveaux de la représentation de l'ensemble partiellement ordonné par la Schur positivité des fonctions de Schur gauches.

The advent of smart well technology, which is the use of down hole sensors to adjust well controls (i.e. injection rate, bottomhole pressure, etc.), has allowed the possibility to control a field in all stages of the production. This possibility holds great promise in better managing enhanced oil recovery (EOR) processes, especially in terms of applying optimization techniques. However, some procedures for optimizing EOR processes are not based on the physics of the process, which may lead to erroneous results. In addition, optimization of EOR processes can be difficult, and limited, if there is no access to the simulator code for computation of the adjoints used for optimization. This research describes the development of a general procedure for designing an initial starting point for a surfactant flood optimization. The method does not rely on a simulator's adjoint computation or on external computing of adjoints for optimization. The reservoir simulator used for this research was Schlumberger's Eclipse 100, and optimization was accomplished through use of a program written in Matlab. Utility of the approach is demonstrated by using it to optimize the process net present value (NPV) of a 5-spot surfactant flood (320-acres) and incorporating the optimization solution into a probabilistic geological and economic setting. This thesis includes a general procedure for optimizing a surfactant flood and provides groundwork for optimizing other EOR techniques. This research is useful because it takes the optimal solution and calculates a probability of success for possible NPVs. This is very important when accessing risk in a business scenario, because projects that have unknown probability of success are most likely to be abandoned as uneconomic. This thesis also illustrates possible NPVs if the optimal solution was used.

Petroleum engineers generate reservoir simulation models to optimize production and maximize recovery. History matching is one of the methods used to calibrate the reservoir models. During traditional history matching, individual model variable parameters (permeability, relative permeability, initial water saturation, etc) are adjusted until the production history is matched using the updated reservoir model. However, this method of utilizing only one model does not help capture the full range of system uncertainty. Another drawback is that the entire model has to be matched from the initial time when matching for new observation data. Ensemble Kalman Filter (EnKF) is a data assimilation technique that has gained increasing interest in the application of petroleum history matching in recent years. The basic methodology of the EnKF consists of the forecast step and the update step. This data assimilation method utilizes a collection of state vectors, known as an ensemble, which are simulated forward in time. In other words, each ensemble member represents a reservoir model (realization). Subsequently, during the update step, the sample covariance is computed from the ensemble, while the collection of state vectors is updated using the formulations which involve this updated sample covariance. When a small ensemble size is used for a large, field-scale model, poor estimate of the covariance matrix could occur (Anderson and Anderson 1999; Devegowda and Arroyo 2006). To mitigate such problem, various covariance conditioning schemes have been proposed to improve the performance of EnKF, without the use of large ensemble sizes that require enormous computational resources. In this study, we implemented EnKF coupled with these various covariance localization schemes: Distance-based, Streamline trajectory-based, and Streamline sensitivity-based localization and Hierarchical EnKF on a synthetic reservoir field case study. We will describe the methodology of each of the covariance localization schemes with their characteristics and limitations.

English Abstract Tudor court gives support completely to the cultural activities, and court¡¦s members have qualification for musical accomplishment that produced an effect on the whole surroundings. It builds close relations between the development of instrumental ensemble music and ceremonies, entertainment, and the living requirement. Therefore, the thesis intends to study the relationship between the court entertainment at early Tudor and its instrumental ensemble music. The content consists of four chapters, in addition to the introduction. Chapter one is the general discussions about the contemporary polity, economy, society, religion, and cultural context from the end of the fifteenth-century to the early of the sixteenth-century. In the second chapter contains the details of the court entertainment, the third chapter focuses on the thirty-five pieces from Henry ¢À¡¦s Book, which are the absence of text , and the fourth draws a conclusion. From Middle Ages to Renaissance, the situation in England changes from variety aspects such as politics, economy, society, religion, and culture, But it provides a favorable atmosphere with the instrumental ensemble. The music is indispensable to the court environment of the early Tudor. The minstrel¡¦s number and ability represent the status of the employer. Moreover, the instrumental ensemble what musical type is proper for the ceremonies, entertainment, and performance. The thirty-five pieces are considered as embryonic form that pieces for instrument, and differed in length and style. They are classified in three: one is ¡§puzzle canon¡¨, another is ¡§consort¡¨, and the rest is arrangement of the voice or the special technique pieces. Because most of which are simple chord style, it is demonstrated that new noblemen are fond of the pieces. However, the simple style of the early instrumental ensemble music is distinct from the polyphonic style of the consort afterwards. The style¡¦s change attributes to the rising new nobility, the Reformation, the trend of Renaissance thought, the patron of the Royal, and the import of the foreign music, player, and instrument. In a word, the musical phenomenon that is the variety of the style reflects the changes in the society of the Tudor.