Predicting the mass, position, and velocity of an object during its reentry are critical to satisfy NASA and ESA requirements. This thesis outlines a 3-D orbit and mass determination system for use on low earth orbit as applicable to general objects, of various material and size. The solution uses analytical models to calculate heat flux and aerodynamic drag, with some basic numerical models for simple orbit propagation and mass flow rate due to ablation. The system outlined in this thesis currently provides a framework for rough estimates of demise altitude and final mass, but also allows for many potential accuracy and speed improvements. 77 aerospace materials were tested, in solid spheres, cubes, and cylinders; it was found that materials with low latent heat of fusion (less than 10 kJ/kgK) demise before reaching the ground, while materials with higher melting point temperatures (over 1200K), high specific heats, and high latent heat of fusion (over 30 kJ/kgK) lose small amounts of mass before hitting the ground at speeds of 200-300m/s . The results of this thesis code are validated against NASA's Debris Assessment System (DAS), specifically the test cases of Acrylic, Molybdenum, and Silver.

<p> This dissertation is an attempt to apply the motif of exile to the church in Canada today and employ biblical resources to guide the church in its engagement with Canadian culture. At one time the church held a place at the centre of Canadian life and contributed to the formation of national culture. As the nation has evolved, the role of the church has shifted significantly. The advent of secularization and a post-Christian, postmodern culture has moved the church from the centre to the margins of Canadian society. The proposal offered here is that this move can be understood as a form of exile. Exile is a rich motif in the history of the Christian faith. Our ancestors in the faith, the nation of Israel, were exiled by foreign nations. The Old Testament is, in many respects, a witness to that experience. Second Temple Jews continued to live under the authority of foreign powers and they also produced literature that testifies to their own sense of remaining in and responding to exile. The early church also understood itself as living in theological exile. The literature of the New Testament demonstrates how the first Christians sought to live faithfully while yet separated from their true, eschatological home. An understanding of exile in these texts and the theological approach that they offer can inform the church in Canada today as it also seeks to live faithfully in its particular contemporary context. This study seeks to engage the biblical materials with a view to applying their exilic wisdom to the life of the Canadian Church today. While the sociological demise of the church in Canada is now part of its historic narrative, exile can offer the contemporary church a paradigm for theological re-orientation, even as it did for Israel and the early church. Thus, adopting an exilic outlook and various aspects of a practical theology of exile can equip the Church in Canada with hope as it faces the challenges of its current circumstances.</p> / Thesis / Doctor of Philosophy (PhD)

This thesis attempts to describe the contingent events that led to the downfall of Lord High Chancellor Thomas Wolsey in England. Using the British History Online website and Hall's Chronicles, I read all the letters and papers under Henry VIII between the years of 1527 and 1529. While the popular belief is that it was from Wolsey's incapability to get the annulment Henry VIII wanted from his first wife, there are other arguments that attempt to steer away from that popular viewpoint. While I do follow the popular belief, in my research I found that the common belief of the inability to get the annulment is true, but not as black and white as it has been made out to be. There were many events and circumstances that hindered Wolsey and other delegates that were involved ranging from physiologically to politically. In addition, the downfall of Wolsey was not as gradual as has been assumed.

L'amour, le ʿišq «amour-passion» et les histoires d'amants que le sort épargne ou sur lesquels il s'acharne, sont des thèmes qui ont touché et touchent toujours toutes les sociétés, et semblent traverser les siècles sans vieillir. Certaines légendes ont été rapportées oralement, peut-être même chantées au début, puis grâce à l'écriture et à la réécriture, nous pouvons les lire aujourd'hui. Mais on a tendance à privilégier certaines anecdotes, certains poètes des premiers siècles de l'Islam. Les auteurs des siècles plus tardifs ne semblent pas avoir été assez étudiés du moins pour ce thème de l'amour. C'est le cas de notre auteur : Ibrāhīm b.ʿUmar al-Biqāʿī (m.885/1480), dont l'œuvre est impressionnante, plus de quatre vingt dix titres. Il est surtout connu pour ses productions concernant l'exégèse et le hadith. Son côté littéraire demeure inconnu ou presque.Notre recherche porte sur l'édition critique et le commentaire d'un de ses manuscrits intitulé : Aswāq al-Ašwāq min Maṣāriʿ al-ʿUššāq, titre que nous traduisons par : «Des Marchés des Désirs et des Trépas des Amants», œuvre souvent citée par les chercheurs qui s'intéressent à ce thème, mais jamais éditée. / Love-passion and lovers stories, which the fate spares or whom it persecutes, are themes which touched all the societies, and seem to cross the centuries without aging. Certain legends were orally reported, may be even sung at the begenning, then thanks to the writing and the rewriting, we can read them today.But we tend to favor certain anecdotes, certain poets or authors of the first ones centuries of the Islam.The authors of the later centuries do not seem to have been studied enough at least for this theme of love.It is the case of our author Ibrāhīm al-Biqāʿī ( d.885 H/ 1440 J-C) whom the work is impressive, more than ninety titles. He is especially known for its productions concerning the exegesis and the hadith. His literary side remains unknown or almost.Our research concerns the critical edition and the comment of one of its manuscripts title : Aswāq al-Ašwāq min Maṣāriʿ al-ʿUššāq, which I translate : «Markets of the desires and the demise of the lovers».

This work describes the process of the design of a flight software for a space-qualified device, outlines the development and testing of the SW, and provides a description of the final product. The flight software described in this work has been developed for the project Demise Observation Capsule (DOC). DOC is a device planned to be attached to an upper stage of a launch vehicle and observe its demise during atmospheric re-entry at the end of its mission. Due to constraint on communication time during the mission and the need to maximize the amount of transferred data, a custom communication protocol has been developed. / Demise Observation Capsule

Le Crétacé inférieur est ponctué de perturbations du cycle du carbone associées à des épisodes de préservation de matière organique et à des crises de la production carbonatée néritique et pélagique. Ces évènements coïncident également avec des refroidissements à très court terme (<1Ma) dont l’origine et les conséquences sont encore imprécises en raison de la faible résolution des courbes de températures dans les eaux de surface. Les études récentes réalisées à partir de modèles climatiques couplés à des modèles géochimiques laissent penser qu’une crise de la production carbonatée pourrait engendrer un refroidissement climatique sur une échelle de temps inférieure à 1 Ma (Donnadieu et al., accepté). Basées sur les dépôts d’âge Valanginien des coupes de La Charce–Vergol et d’Ollioules (Sud-est de la France) et sur les sédiments de l’Aptien du sous-Bassin de Galvé (Nord-est de l’Espagne), des études stratigraphiques, paléoécologiques et géochimiques ont été menées pour établir les relations entre la production carbonatée et le climat au cours du Valanginien et de l’Aptien. Pour cela, des courbes de température à haute résolution pour les eaux de surface ont été établies et mises en regard des évolutions des producteurs néritiques et pélagiques de carbonate. Le Valanginien et l’Aptien présentent tous deux des arrêts polyphasés de la production carbonatée néritique. Certains arrêts précèdent des refroidissements à court terme, dont ceux datés du Valanginien supérieur, du début et de la fin de l’Aptien inférieur. Cette succession suggérerait un lien de cause à effet entre les crises de la production et les fluctuations climatiques. Toutefois, les refroidissements du Valanginien supérieur et de la fin de l’Aptien inférieur sont respectivement précédés par un enfouissement de matière organique continentale et océanique, qui est un processus pouvant également générer une diminution de CO2 et un refroidissement. Ce travail a permis de mettre en évidence les répercutions des changements climatiques sur la production carbonatée par l’intermédiaire de changements de producteurs dans les domaines néritiques et pélagiques. Dans un premier temps, la mise en place de conditions froides au Valanginien supérieur et à la fin de l’Aptien inférieur est suivie de remplacements floro-fauniques caractérisés par l’évolution de communautés hétérozoaires à photozoaires. Les bouleversements observés suggèrent un changement drastique des conditions trophiques sous le développement de conditions arides relatives au refroidissement. Dans un second temps, l’évolution des communautés pélagiques au Valanginien répondraient également aux changements climatiques : ces communautés marquées d’un déclin depuis la fin du Valanginien inférieur présentent une courte reprise du début au milieu du Valanginien supérieur. Cette reprise coïncide avec le développement de conditions froides et plus arides occasionnant des conditions trophiques plus faibles / The Early Cretaceous is punctuated by carbon cycle perturbations, associated with organic matter burial episodes and carbonate production crises. These events coincide with short-term cooling (<1Ma), yet the mechanisms are still unclear, because of low resolution in sea surface temperature reconstructions. Recent climatic models suggest that carbonate-platform-collapse events may trigger a short-term ocean cooling episode (Donnadieu et al., accepted). In order to establish relations between climates and carbonate productions, we performed stratigraphic, palaeoecologic and geochemical analyses on Valanginian sediments from the La Charce-Vergol and the Ollioules sections (South-East France) and Aptian sedimentary record of the Galvé subasin (North East Spain). Therefore, high-resolution sea surface temperature curves were reconstructed with regard to the pelagic and neritic carbonate producer evolution. Both Valanginian and Aptian stages are marked by polyphased neritic production drawdown. Moreover, the Late Valanginian, basal and latest Early Aptian carbonate-platform demises predate a short-term cooling occurrence. The chronology of these events may imply that carbonate production decrease may have affected the atmospheric CO2 pool and the climate. Nevertheless, the decreases of water temperature that took place in the Late Valanginian and the latest Early Aptian are also prior to episodes of continental and oceanic organic matter burial, respectively. This process is also known as a CO2 drawdown and cooling generator. The present study allowed establishing climate feedbacks on the pelagic and neritic carbonate producers triggering fluctuations of the carbonate production fluxes. At first, cooler conditions during the Late Valanginien and latest Early Aptian are posterior to floro-faunal changes characterised by heterozoan to photozoan replacements. These suggest a trophic level decrease relative to cool and dryer climatic condition. Subsequently, nannoconid communities seem to record a response to the Late Valanginian climatic change: these producers are characterised by a decline from the latest Early Valanginian onward, interrupted by a recovery from the earliest Late Valanginian up to the mid-Late Valanginian. This recovery coincides with the development of cooling and dryer conditions, triggering low trophic level and thus promoting a subsequent pelagic production recovery.