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2009 — Test-retest properties of objective maximal neck force measures in a population of healthy adultsAbstract
Neck pain is an increasing problem in industrialized societies. Research is necessary to find ways to objectively measure neck dysfunction. The purpose of this Master's project was to examine the test-retest properties of a dynamometric system for neck force measurements and to obtain reference measures on isometric cervical strength in a healthy population. Twenty-eight healthy subjects participated in this study; 16 males and 12 females. Cervical strength was measured using the MCU(TM) Multi-Cervical Unit (BTE Technologies(c)) in six directions: flexion, extension, protraction, retraction and right and left lateral flexion. The test-retest reliability was good to excellent (≥ 0.85) for all … Read more
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2009 — Cloud climatology and microphysics at Eureka using synergetic radar/lidar measurementsAbstract
Malgré leur importance dans le budget radiatif terrestre et les modèles atmosphériques, les nuages arctiques restent mal documentés et incompris. Le déploiement d'un radar millimétrique et d'un lidar à haute résolution spectrale à Eureka (80°N) en août 2005 offre un ensemble unique de données pour l'étude des nuages arctiques. Dans ce projet, des algorithmes synergétiques furent développés et appliqués à deux ans de données pour fournir une première climatologie des nuages et de leur microphysique à cet emplacement éloigné. Les résultats montrent un cycle annuel dans l'étendue des nuages. Ils sont surtout détectés dans les bas niveaux ou en une … Read more
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2009 — Children's ability to detect deception: examining age differences and other factors related to children's detection accuracyAbstract
La capacité de déduire la déception chez les enfants par leurs pairs a été examinée. Projet 1 consiste de sujets de maternelle (4 à 6 ans), du primaire (7 à 9 ans) et de jeunes adultes (17 à 25 ans) qui ont regardé des clips d'enfants qui disaient soit un mensonge ou la vérité. Que les enfants du primaire ont pu déduire correctement, à un niveau significativement plus haut que la chance, entre un mensonge et la vérité. Dans le Projet 2, une scène où l'enfant promet de dire la vérité est inclus. Le nombre de bonne conclusion a augmenté … Read more
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2009 — Relative sectional curvature in compact angled 2-complexesAbstract
We define the notion of relative sectional curvature for 2-complexes, and prove that a compact angled 2-complex that has negative sectional curvature relative to planar sections has coherent fundamental group. We analyze a certain type of 1-complex that we call flattenable graphs Gamma→ X for an compact angled 2-complex X, and show that if X has nonpositive sectional curvature, and if for every flattenable graph pi1 (Gamma) → pi1( X) is finitely presented, then X has coherent fundamental group. Finally we show that if X is a compact angled 2-complex with negative sectional curvature relative to pi-gons and planar sections … Read more
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2009 — Privatization of international airports: the case of Bogota's Eldorado international airportAbstract
ABSTRACT Based on a new conception of airports, and recognizing the airport's preeminent role in strengthening a region's economy, this thesis centers on the positive and negative aspects of privatizing international airports. The core case study for the investigation is Eldorado International Airport, serving the city of Bogotá and port of entrance to the South American continent. It concludes that privatization of international airports has grown to be the best means by which large-scale aviation infrastructure projects are to be realized if airports are to not only attend rising traffic demand, but also as private enterprises that deliver users quality … Read more
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2009 — EXIT chart analysis for compressive turbo codesAbstract
Turbo codes have achieved near Shannon limit performance in data communication over noisy channels. Recently introduced EXtrinsic Information Transfer (EXIT) Charts [15] have become an essential part of turbo code design and have also been used as a complementary design tool for the traditional bit error rate simulations. Additionally, compressive turbo codes have been shown to achieve near-entropy performance in different source coding problems [1], [46], [74]. The main objective of this thesis is an extension of EXIT charts from turbo channel codes to turbo source codes, as well as extension of this technique to analog and finite precision iterative … Read more
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2009 — Characterization of the respiratory phenotype of the Late Gestation Lung 1 («Lgl1») heterozygote mouseAbstract
Bronchopulmonary dysplasia (BPD), a disease characterized by an arrest in alveolar development, remains one of the leading causes of morbidity in very low birth weight newborns [1, 2]. Insight into the mechanisms and genes involved in alveolarization could be used to better understand the lung pathophysiology of this disease and help with the development of new treatment interventions. Lgl1, is a developmentally regulated, glucocorticoid induced, secreted glycoprotein in the lung [3]. In O2 toxicity animal models of BPD, Lgl1 levels are reduced and return to normal during recovery in air [4]. To determine if a deficiency of Lgl1 is associated … Read more
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2009 — Toll-like receptor modulation of disease relevant B cell responsesAbstract
B cells are becoming increasingly recognized as important immune regulatory cells. Depending on their context of activation, the balance of B cell production of proinflammatory and anti-inflammatory cytokines is affected. Recent work has shown that Toll-like receptor (TLR) ligation is an important signal affecting B cell activation. We sought to determine the effect that the combination of antigen recognition, T cell help and TLR ligation would have on B cell response profiles of both control donors and Multiple Sclerosis (MS) patients. We found that TLR8 ligation resulted in enhanced B cell proliferation and survival combined with a marked suppression of … Read more
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2009 — Experiments on the dynamics of cantilevered pipes subjected to internal andor external axial flowAbstract
The main objective of this thesis is to study and investigate the dynamics and stability of cantilevered structures subjected to internal, external, or simultaneous internal and external axial flows. This was accomplished, in some cases, by deriving the linear equations of motion using a Newtonian approach and, in other cases, by making the necessary modifications to existing theoretical models. The continuous cantilevered systems were then discretized using the Galerkin method in order to determine their complex eigenfrequencies. Moreover, numerous experiments were performed to compare and validate, or otherwise, the theoretical models proposed. More specifically, the four cantilevered systems studied were … Read more
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2009 — The Process of problem finding in inquiry education: a focus on students' experiencesAbstract
Est-ce que les étudiants dans les classes d'enquête qui s'engage dans la résolution de problème rapporte-ils des expérience différentes comparer a ceux dans les classes d'enquête qui ne s'engagent pas dans la résolution de problème? De plus, est-ce que les étudiants qui s'engages dans la résolution de problème rapporte plus de comportements qui démontre une bonne résolution de problèmes que les étudiants qui ne s'engagent pas dans la résolution de problème? Qu'elles sont les liens communs et les expériences unique avec le processus du problème trouvent? [...] Read more
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2009 — Toward the aerodynamic shape optimization of wind turbine profilesAbstract
This research presents automatic aerodynamic shape optimization results for the NREL S809 wind turbine profile. The objective of this re-design was to improve the total lift to drag ratio for steady low-Mach number flows. This research sets the groundwork for the development of a multidisciplinary optimization framework for complete wind turbine rotors. To develop the aerodynamic design framework for the wind turbine applications, low-Mach preconditioning and Menter's k-omega SST turbulence model have been implemented into the flow solver. A preconditioned discrete viscous adjoint-based automatic aerodynamic optimization method has been developed and validated. Various design case studies of the NREL Phase … Read more
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2009 — Mobilization and detoxification of soils, contaminated with carcinogenic oxyanions using micro-and nano- sized metallic particlesAbstract
Le lavage de sols est un processus de traitement qui a été employé intensivement pour l'extraction des produits toxiques, néanmoins le processus ne détoxique pas les polluants mobilisés. Les procédés plus communs de désintoxication incluent les réactions rédox qui sont négociées par les métaux nullivalents (MNVs). La réduction de Cr(VI) au Cr(III) est souhaitable, car la dernière espèce est moins toxique pour la plupart des êtres vivants, et a également une basse mobilité et disponibilité biologique. Les objectifs principaux de ce projet ont inclus le développement d'une méthode efficace pour l'extraction et la détoxication des anions inorganiques toxiques utilisant MNVs … Read more
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2009 — Watershed evaluation of beneficial management practices: the Bras d'Henri watershed-on-farm economicsAbstract
Le projet d'Évaluation des pratiques de gestions bénéfique à l'échelle du basin versant (EBB) est financé par Agriculture Canada (AAAC). Cette étude met l'emphase sur la problématique de pollution diffuse agricole présente dans le sous-bassin versant du Bras d'Henri. Cette étude fait l'estimation de l'impact à la ferme d'une contrainte environnementale croissante et de la performance environnementale et économique des Pratiques de Gestions Bénéfiques (PGB) pour satisfaire une contrainte environnementale. Les objectifs du model était de maximiser les revenus nets agricoles en ce conformant à une contrainte environnemental, à l'utilisation unique des champs, et au respect des besoins nutritionnels des … Read more
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2009 — Self-perceptions of competence in adolescents with and without learning disabilitiesAbstract
Les enfants avec troubles d'apprentissage (TA) et trouble de déficit d'attention avec ou sans hyperactivité (TDAH) ont parfois des perceptions de leurs compétences comme étant exagérées dans différents domaines dans lesquels ils ont des difficultés spécifiques. Pour élaborer à ce sujet, ce projet a comme objectif principal d'évaluer les perceptions de compétences dans les domaines scolaires de mathématiques et d'épellation sur un groupe de 60 adolescents dont 30 avec TA et 30 sans TA. Les adolescents avec TA ont surestimé leurs compétences en mathématique relativement à leur propre performance, mais ce résultat n'est pas réapparu lors des exercices d'épellation. De … Read more
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2009 — Lung hyperinflation does not impair central and peripheral blood flow adaptation to rhythmic knee extension exercise in chronic obstructive pulmonary disease (COPD)Abstract
In patients with chronic obstructive pulmonary disease (COPD), lung hyperinflation has been suggested to reduce cardiac output (Qc) and impede peripheral blood flow, thereby contributing to reduced peak oxygen utilization (VO2) and exercise intolerance observed in this population. However, investigations on peripheral blood flow responses to exercise in COPD are few and have provided divergent results. Moreover, evidence of hyperinflation-induced circulatory limitation is lacking in COPD. Therefore, this study aimed to clarify the impact of lung hyperinflation on central and peripheral perfusion, and the subsequent effects on oxygen delivery to exercising muscle during submaximal knee extension exercise. Results showed that … Read more
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2009 — Critical analysis of multiple-points statistics methods in the stochastic simulation of geology at Fox Kimberlitic Diamond Pipe located on the Ekati Property, North West TerritoriesAbstract
Multiple-point simulation (MPS) methods have been developed over the past decade as a mean to generate stochastic simulations while reproducing complex geological patterns, such as high-grade depositional veins, groups of high-grade lentil shaped orebodies, or the spatial geometries and patterns of diamond-bearing kimberlite pipes. This thesis compares two MPS methods by modelling the geology of a diamond pipe located at the Ekati mine, NWT, Canada. The single normal equation simulation algorithm SNESIM, which captures different patterns from a training image (TI), and the filter simulation algorithm FILTERSIM, which classifies the patterns founded on the TI, are considered in this study. … Read more
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2009 — Discovery, distribution, and eradication potential of the introduced mud crab, «Rhithropanopeus harrisii», in the Panama CanalAbstract
Torchin, Mark (Supervisor2) Read more
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2009 — Ozonation of sulfamethoxazole in municipal wastewaterAbstract
Plusieurs pharmaceutiques, tel que l’antibiotique sulfaméthoxazole ne sont pas totalement éliminées lors du traitement des eaux usées et ne sont pas biodégradables dans l’environnent. Au cours de ce projet, deux types de solutions de sulfaméthoxazole ont été étudiées : à base d’eau traitée par osmose inverse et à base d’eau usée municipale. Des solutions ayant des concentrations de 60 mg/L et 100 μg/L ont été traitées par ozonation.Une méthode d’extraction en phase solide a été développée afin de préconcentrer les échantillons avant l’analyse par HPLC. Les solutions de sulfaméthoxazole composées d’eau traitée par osmose inverse et d’eau usée ont requis … Read more
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2009 — The Psychosocial impact of trait and state differences in uncertainty: the case of HPVAbstract
A crucial element affecting individuals' responses to a health threat is how certain or uncertain they feel about whether that health threat will occur. Moreover, individuals differ in the degree to which they are affected by uncertainty. I propose that state and trait differences in uncertainty interact to predict psychosocial responses. The first manuscript shows that a higher intolerance of uncertainty (IU) leads to greater information-seeking about a health threat. The second manuscript shows that this relationship is moderated by perceived situational uncertainty (SU) and also affects worry. Specifically, individuals with higher IU seek the most information and worry most … Read more
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2009 — Assessing the effects of the Baie-des-Sables (Quebec) wind farm on the spring migratory behaviour and abundance of raptorsAbstract
Despite their environmental benefits, wind farms, have attracted controversy with regard to their impacts on birds. These impacts include collision risks, direct and indirect habitat loss and barrier effects. The main objectives of this study were to determine whether the Baie-des-Sables wind farm, located on the south shore of the St-Lawrence River, is having an impact upon the spring migration of raptors. Emphasis was placed on comparing the differences between both behaviour and abundance of migrating raptors between the wind farm and a contr9l area. Three aspects of behaviour were recorded; altitude, change in direction and flight type. No significant … Read more
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2009 — COPD patients responding to Tiotropium with dyspnea relief: a proof of efficacy?Abstract
Bourbeau, Jean (Internal/Cosupervisor2) Read more
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2009 — How we vote: information heterogeneity, process and choiceAbstract
Est-ce que les électeurs informés prennent compte d'un plus grand nombre de facteurs quand vient le temps de voter? Est-ce que les variations quant aux choix des considérations prises en compte mènent à des choix électoraux différents? Est-ce que les institutions politiques et la complexité électorale ont une incidence sur les processus de décision des électeurs et le choix du vote? À l'aide de données recueillies en Australie, en Grande-Bretagne, au Canada, en Nouvelle-Zélande et aux États-Unis (21 enquêtes au total), cette recherche examine comment l'hétérogénéité dans le niveau d'information des électeurs influence le choix du vote ainsi que le … Read more
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2009 — Le 'comique qui ne fait pas rire' dans «Bouvard et Pécuchet» de Gustave FlaubertAbstract
Ce mémoire a pour objet une lecture de Bouvard et Pécuchet (1881) de Gustave Flaubert à travers le prisme du « comique qui ne fait pas rire ». Le point de départ de ce mémoire est une question : comment expliquer que le comique de Bouvard et Pécuchet, explicitement revendiqué par le romancier dès les premiers balbutiements du projet, ait embarrassé bon nombre de critiques, comme s'il était inadéquat au roman ? Nous verrons comment cette hésitation — Bouvard et Pécuchet est-il comique ou non ? — est inscrite dans le roman, qui déploie un espace, Chavignolles, ambigu et indocile … Read more
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2009 — Consumer valuation of food attributes: a comparison of willingness to pay estimates from choice modelling and contingency valuation methodsAbstract
This study compares the willingness to pay values from two different stated preference methods, choice modeling (CM) and contingent valuation (CV). The CV approach used was a multiple bounded discrete choice (MBDC) format. The WTP values were estimated for different food products that contained different environmental and health attributes. The two methods were found to generate statistically different WTP estimates for tomatoes and pork and were statistically similar for milk. The difference seems to reside in the model specification; when the attributes were analyzed as non-linear, the WTP estimate using the CM method was statistically similar to the one estimated … Read more
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2009 — Mechanical modeling and testing of a composite helicopter structure made by resin transfer mouldingAbstract
The design and mechanical performance of a helicopter horizontal stabilizer slat made by resin transfer moulding (RTM) can be evaluated with finite element analysis (FEA). To verify the validity of the assumptions used in the modelling of the slat structure, static mechanical tests were performed on prototype slats which were half of the full-size length. The slat complex boundary conditions were simplified to make static mechanical testing possible. Two fixtures were designed and built to introduce simplified loads in specimens with two different bracket configurations: a full and a half bracket. A finite element (FE) model of the specimens was … Read more
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2009 — Arda: a framework for procedural video game content generationAbstract
The current trend in computer game design is toward larger and richer virtual worlds, providing interesting and abundant game content for players to explore. The creation and continuous expansion of detailed virtual environments, however, is a time and resource-consuming task for game developers. Procedural content generation potentially solves this problem; textures, landscapes, and more recently the creation of entire cities and their constituent roads and buildings can be performed in an auto mated fashion, potentially offering considerable resource savings for developers. This thesis develops a comprehensive system for content generation, centering on a hierarchical world design. The Arda tool is … Read more
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2009 — Place-making as poetic world re-creation: an experiential tale of Rogelio Salmona's places of obliqueness and desireAbstract
Cette dissertation explore l'oeuvre de l'architecte colombien Rogelio Salmona (1927- 2007) d'un regard interprétatif qui privilège les idées d'expérience poétique et de lieu, considérés comme deux aspects essentiels du métier d'architecte. La dissertation explore le façonnement et l'expérience des lieux de Salmona sous l'angle de la poétique de l'imaginaire, établissant ainsi des liens entre l'histoire de l'architecture et ses traditions. Dans ce dessein, la thèse construit un cadre théorique à travers l'activité parallèle à l'architecture qu'est l'écriture poétique et revisite le concept de lieu sous une perspective phénoménologique. L'étude de cas porte sur une oeuvre mature de Rogelio Salmona, un … Read more
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2009 — Progranulin is expressed within motor neurons, promotes neuronal cell survival, and is secreted at least in part via the constitutive secretory pathwayAbstract
Progranulin is a secreted high molecular weight growth factor. While inappropriate over-expression of the progranulin gene has been associated with many cancers, haploinsufficiency leads to atrophy of the frontotemporal lobes and development of a form of dementia (FTLD-U). We have demonstrated that progranulin is abundantly expressed in mouse motor neurons in vivo and primary cultures in vitro. The cellular location of progranulin was examined using confocal microscopy. Progranulin was localised to organelles using immunocytochemistry and by examining the intracellular fate of exogenously expressed flu orescently-labelled progranulin. Taken together these studies revealed progranulin to be located within compartments of the secretory … Read more
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2009 — Adolescent pregnancy and low birth weight in the Peruvian AmazonAbstract
Objective: To compare low birth weight (LBW) (< 2,500g) between infants born to adolescent and adult mothers in Iquitos, Peru. Methods: A random sample of 4,467 birth records was collected. Multivariate analyses were performed to compare both the proportion of LBW and mean birth weight of newborns of adolescents (10-14 yrs, 15-19 yrs) and adults (≥ 20 yrs) and then for primiparous mothers only. Results: For all mothers, all adolescents had significantly greater odds of having a LBW infant than adults. For primiparous mothers, the same was true only for 10-14 year-olds. There were significant differences in mean birth weight … Read more
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2009 — Novel aspects of the mammalian forebrain morphogenesisAbstract
The theme of this dissertation has been to look at characteristics of neurogenesis of the interneurons of mammalian telencephalon, mainly in the striatum and cortex, and compare with neurogenesis patterns of projection neurons. In addition, we have looked at developmental postnatal anterograde thalamostriatal survival mechanisms of striatal neuronal populations and their possible implications in Huntington's disease. Interestingly, most if not all interneurons of the striatum and cortex, at least in case of rodents, are generated far from the germinal zones of these telencephalon divisions. Parvalbumin- and calretinin-positive interneurons, which represent major GABAergic interneuron subpopulations in striatum and cortex originated in … Read more
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2009 — Mnemonic influences on perception as revealed by visual aftereffectsAbstract
Perceiving a visual object often leads to the formation of its representation in memory. In this case, the role of visual perception in memory is emphasized, but it is also conceivable that memory plays a role in the processing of a visual stimulus in a top-down manner. One way to study whether memory does influence visual perception is to make use of the selective adaptation method designed to produce aftereffects. In a typical selective adaptation experiment, a stimulus is presented for an extended period of time (adapting stimulus) and this results in a temporary distortion in the perception of subsequent … Read more
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2009 — Observation of electrochemically induced conductance modulation in graphene field effect transistorsAbstract
Motivated by the interest in graphene as a chemical sensor, this thesis presents an analysis of how the conductance of a fabricated graphene field effect transistor can be modulated by the presence of water vapour and oxygen in the substrate of the device. The fabrication process of a graphene field effect transistor consists of optically locating a graphene monolayer on an oxidized silicon substrate, and contacting it with metal electrodes using electron-beam lithography. The conductance of graphene FETs at ambient conditions, vacuum, and exposed to different gases, is measured to investigate the connection between conductance modulation and the electrochemistry taking … Read more
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2009 — The effect of sampling noise in ensemble-based Kalman filtersAbstract
Ensemble-based Kalman filters have drawn a lot of attention in the atmospheric and ocean scientific community because of their potential to be used as a data assimilation tool for numerical prediction in a strongly nonlinear context at an affordable cost. However, many studies have noted practical problems in their implementation. Indeed, being Monte-Carlo methods, the useful parameters are estimated from a sample of limited size of independent realizations of the process. As a consequence, the unavoidable sampling noise impacts the quality of the analysis. An idealized perfect model context is considered in which the analytical expression for the analysis accuracy … Read more
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2009 — Multimodal signal processing in the peripheral and central vestibular pathwaysAbstract
Les organes sensoriels vestibulaires de l’oreille interne détectent les mouvements de la tète dans r espace. Ces informations sont envoyées aux neurones vestibulaires centraux localises au niveau du tronc cérébral. A ce niveau convergent également d'autres signaux en provenance du cortex, du cervelet. de la moelle ainsi que de divers noyaux du tronc cérébral. Les études présentées ici ont pour but de comprendre le mode de codage et la nature des signaux générés par les neurones vestibulaires périphériques, ainsi que les capacités de traitement des neurones vestibulaires centraux. véritable centres d'intégration sensori-motrice. Ces travaux ont été conduits en condition physiologique … Read more
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2009 — Mechanisms involved in the establishment and maintenance of genomic imprintsAbstract
Genomic imprinting is a phenomenon that results in parent of origin dependant gene expression. During mammalian gametogenesis, genomic imprints are erased, and reestablished in sperm and oocytes in a sex-dependent manner. Most genomic imprints that are inherited by the embryo from its parents are maintained throughout the life of the individual. Aberrant genomic imprinting may lead to embryonic lethality, developmental anomalies and increased risk of cancer. To better understand the mechanisms of imprinting errors, we explored two potential sources of such errors: a) genetic anomalies that affect DNA methylation and spermatogenesis in mice, and b) the influence of cell culture … Read more
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2009 — The efficacy of manager teaching to enhance leadership learning and effectivenessAbstract
"Development of others" appears consistently in leadership competency frameworks; managers are now being asked to think of themselves as teachers in addition to their myriad other roles. Little empirical evidence however seems to exist that managers who teach their employees learn to lead better, generate more employee satisfaction and are indeed more effective than those who do not. This study found support for this claim. Twenty managers and forty-three of their employees participated in this study. Data were collected from both groups, before and after the managers attended a workshop designed using activity systems theory. Results indicate that employee perceptions … Read more
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2009 — Interleukin-15 and NKG2 receptors modulate CD8 T cell responses in the central nervous system during multiple sclerosisAbstract
Multiple sclerosis (MS) is a demyelinating inflammatory disease affecting the central nervous system (CNS). The pathology of MS is characterized by the infiltration of immune cells into the CNS and by the destruction of myelin-producing cells, the oligodendrocytes. CD8 T cells constitute a prominent fraction of CNS-infiltrating immune cells. They have an effector memory phenotype and can persist as clonal expansions for years in the CNS of MS patients sug gesting their active participation in the local immune response. The work presented in this thesis emanates from the hypothesis that the microenvironment of MS lesions favors and enhances the effector … Read more
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2009 — Development and characterization of a mouse model to determine the impact of low dietary folate on spermatogenesis, fertility and histone methylationAbstract
Folate is a critical determinant in male reproductive health. During spermatogenesis, there are massive alterations to the epigenome associated with tightly regulated gene transcription and chromatin reorganization including a tightly regulated pattern of histone H3 methylation. In vitro experiments were conducted to determine whether folate depletion could alter global histone H3 methylation at lysine 4 and 9 in cultured spermatogonia-like GC-1 cells. Folate depleted media did not alter global levels of histone H3 methylation at lysine 4 and 9 in spermatogonia-like GC-1 cell. In vivo experiments were used to determine the extent to which folate deficiency, from early embryonic development … Read more
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2009 — How do physicians perceive and respond to low income patients?Abstract
Résumé Quel est la perception et la réponse des médecins aux patients démunis? LITTERATURE : Les personnes démunies ont beaucoup de problèmes de santé et un accès relativement faible aux services médicaux et dentaires. Les attitudes, perceptions et idées des dentistes vers les patients de faible revenu sont des déterminants significatifs dans l'accès aux soins. Cependant, nous avons peu d'information par rapport aux médecins. OBJECTIFS : L'objectif de cette étude est ainsi de déterminer les expériences des médecins avec les patients de faible revenu et d'identifier en particulier les difficultés rencontrées quand ils traitent des patients démunis. Nous voulions aussi … Read more
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2009 — Acidification Kinetics of Turnip and Radish by Critic and Acetic AcidsAbstract
L'acidification de légumes hypoacides réduit leur pH en dessous de 4.5, facilitant ainsi leur transformation à des températures n'excédant pas 100degrees celsius, réduisant les dommages thermiques, et donnant un produit de plus grande qualité. Nous avons étudié la cinétique d'acidification avec acide acétique ou acide citrique de morceaux de navet ou de radis, en particulier le temps requis pour que les tissues atteignent un pH de 4.5, ainsi que le pourcentage d'acidité à ce moment. La réponse des deux légumes à une acidification par acide citrique fut comparée. Les expériences suivirent un plan central composé rotatif avec trois variables de … Read more
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2009 — A primer on aircraft financing in IndiaAbstract
Bunker, Donald H. (Internal/Supervisor) Read more
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2009 — Exporing murine placental development in vitro: explant model for placental development and expression of Notch 1 during trophoblast differentiationAbstract
Le dévelopement normal de la structure labyrinthique du placenta est requis pour l'échange des gaz et des nutriments entre la mère et le fœtus. Le dévelopement du labyrinthe débute lorsque l'allantois s'attache au chorion durant l'attachmement chorio-allantoïdien. Cet attachement mène à la differentiation du chorion et de la lame ectoplacentaire en cellules trophoblastiques placentaires, alors que l'allantois formera le système vasculaire du placenta. Les objectifs de cette thèse sont : la generation d'un modèle ex vivo imitant le dévelopement primaire du labyrinthe et de l'analyse de l'expression de Notch1/NICD1 durant la différentiation des trophoblastes in vitro. Tous générant un modèle … Read more
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2009 — Stochastic decoding of LDPC codes over GF(«q»)Abstract
Il a été démontré pour plusieurs types de canaux de télécommunication et de stockage que les codes LDPC non-binaires ont une meilleure performance que les codes les plus souvent utilisés. Par contre, les architectures de décodeur à haut débit qui ont été proposées jusqu'à maintenant sont très complexes, et sacrifient la performance de correction d'erreur de façon à maintenir une complexité acceptable. La présente thèse décrit un nouvel algorithme de décodage qui utilise une représentation stochastique des données pour arriver à une implémentation très simple, et souffrant de très peu de perte de performance par rapport à l'algorithme somme-produit. Nous … Read more
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2009 — Integration of borehole and seismic data to unravel complex stratigraphy : case studies from the Mannville Group, western CanadaAbstract
Understanding the stratigraphic architecture of geologically complex reservoirs, such as the heavy oil deposits of Western Canada, is essential to achieve an efficient hydrocarbon recovery. Borehole and 3-D seismic data were integrated to define the stratigraphic architecture and generate 3-dimensional geological models of the Mannville Group in Saskatchewan. The Mannville is a stratigraphically complex unit formed of fluvial to marine deposits. Two areas in west-central and southern Saskatchewan were examined in this study. In west-central Saskatchewan, the area corresponds to a stratigraphically controlled heavy oil reservoir with production from the undifferentiated Dina-Cummings Members of the Lower Cretaceous Mannville Group. The … Read more
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2009 — Perceptual organisation in diffusion MRI: curves and streamline flowsAbstract
This thesis proposes a new computational framework for the modeling of biological tissue structure in diffusion MRI data. By measuring the local Brownian motion of water molecules, diffusion MRI provides estimates of local fibre orientations in tissues such as the white matter of the brain. Over the last years, diffusion MRI has become an important tool for the in vivo study of brain connectivity. Nevertheless, the inference of the structure of white matter fibres is still an open problem. The methodology introduced in this thesis is based on differential geometry and perceptual organisation. The key ideas are to model white … Read more
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2009 — Prevalence, severity and clinical correlates of pain in patients with Systemic SclerosisAbstract
Thombs, Brett D. (Supervisor2) Read more
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2009 — The implementation of the Yamoussoukro decisionAbstract
La présente thèse traite des progrès de la libéralisation des services de transport aérien en Afrique. Elle s’appuie pour cela sur une évaluation des avancées réalisées dans la mise en œuvre de la Décision de Yamoussoukro ainsi que des effets observés dans le secteur.La Décision de Yamoussoukro libéralisant les services aériens en Afrique date d’il y a déjà dix ans, et pourtant l’état d’avancement de sa mise en œuvre dans les différentes régions est souvent mal connu. Alors qu’il est communément admis que l’application formelle des principes énoncés dans l’accord reste incomplète, la thèse repère nombre de développements intervenus sur … Read more
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2009 — Demography and pollination ecology of «Trillium grandiflorum» in hedgerow corridors and forest patchesAbstract
Présumer que les haies peuvent servir de corridors de dispersion et contenir des populations d'herbacées forestières viables sur la seule base d'inventaires de la végétation peut être biaisé puisque ceux-ci ne tiennent pas compte du délai d'extinction ni des processus démographiques. J'aborde la question de la qualité des haies en tant qu'habitat en comparant la démographie et la pollinisation de Trillium grandiflorum dans des haies et des forêts. Est-ce que la structure des populations et la performance individuelle diffèrent dans les haies des forêts? Est-ce que les services de pollinisation sont comparables entre haies et forêts? Comment des variations dans … Read more
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2009 — Rehabilitation strategies to improve upper limb movement quality in children with cerebral palsyAbstract
McKinley, Patricia (Supervisor2) Read more