The minimum T-XCO₂ location of the reaction boundary calcite + quartz + rutile = sphene + CO₂ has been experimentally determined in H₂0-CO₂-NaCl fluids at 2 kbar. Extent and direction of reaction were monitored by the CO₂ weight change method using natural materials. All bulk compositions contain 23 wt. % NaCI, relative to NaCl-H₂0. Synthetic fluid inclusions trapped at the T-XCO₂ conditions of several points along the curve suggest unmixing of the fluid phase, as evidenced by coexisting CO₂ vapor-rich and aqueous, halite-bearing inclusions. Results from 450-520 °C are listed below. / Master of Science

In recent years a body of literature on the topic of school culture has emerged, highlighting the importance of developing strong school cultures. My purpose was to explore the creation of culture in a new school by studying the school's core principles, leadership, history, practices, decision making, language, membership, environment, and critical events. The setting for this descriptive case study was Chapman Friends School - an alternative Quaker high school located in a mid-Atlantic state. Data-gathering techniques included: (a) weekly on-site observations, (b) formal interviews, (c) school publications and documents, and (d) the researcher's log. The data were analyzed with a thematic coding system based on the cultural components. Three factors were found to be critical in the creation of culture at Chapman Friends School: (a) core principles and the symbolic interactions whereby they were transmitted; (b) the charismatic, authentic leadership of the headmaster; and (c) the consensus-based standards for student membership. The creation of culture at Chapman Friends School was a process wherein school members sought to resolve problems and issues resulting from their conflicting expectations of what the school should be. The creation of culture at Chapman Friends School involved the development of a shared image of what the school should become. Finally, as indicated by previous researchers and supported in this study, a culture evolves over time. The findings expand the field of literature on the subject of school culture and provide insight for school leaders and educators seeking to create effective school cultures. Related topics for further study include: (a) student enrollment screening procedures which shape a school culture, (b) the effect of secular school leaders on the creation of culture in religious-based schools, (c) the effect of the absence of a Quaker majority in Quaker schools, and (d) alternative environmental options for school settings and their effect on school culture. / Ed. D.

The structure of the cabbage looper ocellus was examined by light and electron microscopy. Rhabdoms were found in the distal region of the retinula cells. These were formed by the apposition of microvillar borders of adjacent cells, thus, an interrupted network of rhabdoms was found to exist in cross section. No convergence of first order neurons to second order neurons was found anywhere above the protocerebrum as is typical of insect photoreceptors in general. No synapses were found to exist anywhere above the brain. It is hypothesized that the cabbage looper ocellus plays a major role in determining the light intensity at which crepuscular flight is initiated. This hypothesis was tested in the following manner. Laboratory reared moths were divided into five groups each with a different or no treatment. These were: 1. Compound eyes and ocelli occluded. 2. Compound eyes occluded. 3. Ocelli occluded. 4. Controls. 5. Controls sham treated. All groups were placed in transparent flight chambers and submitted to a simulated sunset. Test results were compared using the Duncan Multi-Range Test and Standard errors. The results indicate that the cabbage looper ocellus plays a role in determining the light intensity at which crepuscular flight is initiated. / Master of Science

The objectives of this study were to determine the influence of sublethal water stress on the physiology of loblolly and Aleppo pine. Gas exchange characteristics, uncoupled thylakoid electron transport capacity, and needle osmotic potentials were measured. Seedlings of both species were watered only when their needle water potential fell below -1.8 and -2.2 MPa respectively (water stress conditioning) or were kept well watered (controls). After 10 weeks of water stress conditioning, both regimes were allowed to dry down. During this period of increasing water stress, photosynthesis in both species was determined at 5 different cuvette CO₂ concentrations (approximately 200, 330, 500, 650, and 800 ppm). With Aleppo pine only, mesophyll resistances and stomatal limitations to gas exchange were estimated. Thylakoids were extracted from both species and their activity was measured in a liquid phase O₂ electrode (Hansatech L^td) as rate of O₂ consumption. Methyl Viologen (1,1’ -dimethyl -4, 4’- bipyridinium ion ) was included in the reaction medium. Photosynthesis decreased with increasing water stress but fell more slowly in the conditioned seedlings. As water stress increased, total resistance to CO₂ exchange increased for both regimes to a much higher level than explained by stomatal resistance alone. In the conditioned seedlings, resistances increased less precipitously than in controls. Osmotic adjustment as measured with thermocouple psychrometers occurred in both species. Decreases in photosynthesis (both species) and increases in mesophyll resistance (Aleppo pine) were not accompanied by a decrease in whole chain uncoupled electron transport capacity. / Master of Science

Les recherches portant sur les préférences manuelles et latérales ont principalement examiné l'habileté et la performance de chaque main dans des tâches unimanuelles et bimanuelles. Cette recherche examine, auprès de 192 individus, les relations pouvant exister entre les préférences unimanuelles et les préférences bimanuelles. De plus, elle veut également examiner certains liens pouvant se former entre les préférences motrices, c'est-à-dire manuelles et podales et les perceptions auditives et oculaires. En terminant, elle porte sur la relation entre l'âge et les préférences latérales motrices, auditives et oculaires ainsi que sur les différences sexuelles pour la latéralité. Pour ce faire, cette recherche utilise un questionnaire comprenant 88 questions et distinguant 59 items unimanuels, 13 items bimanuels, 5 items nécessitant l'utilisation d'un pied, 4 items visuels et 3 items auditifs. Les résultats indiquent que la préférence d'utilisation d'une main est fortement en relation avec les items unimanuels. De plus, ils font ressortir des forts liens entre les tâches unimanuelles et certaines tâches bimanuelles. Il existe également une relation significative entre l'utilisation des instruments à cordes, la saisie d'un instrument à manche bimanuel et la main préférée ainsi qu'une relation entre l'utilisation des instruments sportifs et la main non préférée. Ensuite, on note un changement graduel vers la droite des préférences manuelles, sensorielles et podales des participants en fonction de l'âge de ceux-ci. Enfin, il n'est pas remarqué de différences sexuelles importantes quant aux préférences latérales.

Cette thèse porte sur l'intégrité des processus qui sous-tendent le fonctionnement de la mémoire épisodique chez les adolescents psychotiques. Les deux études rapportées comparent la performance d'adolescents présentant une psychose en début d'évolution à celle d'adolescents non atteints à des tâches sollicitant divers processus impliqués dans le fonctionnement mnésique épisodique. Dans la première étude (Chapitre II), les processus associatifs · en mémoire épisodique sont évalués à l'aide d'une tâche expérimentale impliquant la mémorisation d'une information cible et de son origine, soit la source et le contexte temporel. Les résultats suggèrent principalement une dysfonction des processus associatifs chez les adolescents psychotiques, menant à des représentations mnésiques appauvries et fractionnées. Une perturbation de la capacité à évaluer l'exactitude de l'information récupérée contribue possiblement à la difficulté des patients à identifier l'origine des représentations mnésiques. Dans la deuxième étude (Chapitre III), l'intégrité des processus d'encodage et de récupération en mémoire est évaluée par l'étude des effets d'un indiçage phonologique et sémantique présenté à l'apprentissage et au rappel sur la performance. L'interprétation des données suggère une dysfonction des soustendue en partie par une perturbation des processus exécutifs impliqués dans le fonctionnement mnésique. Des relations entre la production de certains types d'erreurs en mémoire et la symptomatologie psychotique positive sont identifiées dans les deux études. Une perturbation du développement normal de certains processus mnésiques à l'adolescence est également manifeste chez les patients. De façon générale, cette thèse apporte une contribution importante à la compréhension du fonctionnement mnésique des adolescents psychotiques en démontrant que: (a) des atteintes de la mémoire épisodique significatives sont manifestes dès l'apparition de la maladie chez ces jeunes patients, (b) les atteintes mnésiques ne semblent pas spécifiques à la schizophrénie et pourraient plutôt caractériser l'expérience psychotique en général, et (c) l'apparition précoce de l'épisode psychotique pourrait être un facteur déterminant en perturbant la maturation cérébrale et cognitive normalement observée à cette période de la vie. Les connaissances dérivées de ce'tte thèse ont des retombées cliniques importantes, en mettant en lumière des cibles d'intervention psychologique, pharmacologique et cognitive à privilégier auprès de cette clientèle.

Québec Université Laval, Bibliothèque 2015

In the spring of 1861, eager young men gathered in small towns in five southeastern North Carolina counties and enlisted in ten local companies. After spending the summer in a Wilmington training camp, these companies were combined to form the 18th North Carolina Infantry Regiment. The regiment served for a short time in South Carolina before joining the war in Virginia as a member of Gen. Lawrence Branch's brigade. The 18th North Carolina first saw combat in May, 1862, at the Battle of Hanover Court House. A month later, the unit fought in the Seven Days' Battles as part of the Army of Northern Virginia. The 18th North Carolina took an active role in the victorious campaigns of the autumn. In May, 1863, it had the misfortune to be the "friendly" unit that wounded Gen. Stonewall Jackson in the woods near Chancellorsville. At Gettysburg, the 18th North Carolina assaulted the Union center with the rest of the ill-fated soldiers in Pickett’s Charge. The regiment struggled with the army against Grant in the long campaign that culminated in the surrender of the Army of Northern Virginia at Appomattox Court House in April. 1865. This is the history of the 18th North Carolina from its creation to its surrender. / Master of Arts