At public high schools in Cayman, teachers need to improve their productivity and efficiency by using technologies that are simple and portable like their personal devices. Studies about bring your own device (BYOD) initiatives have revealed conflicting outcomes, and are lacking in the Caribbean and especially in Cayman. The purpose of this quantitative study was to determine the main factors related to teachers' willingness to adopt BYOD in public high schools in Cayman. The theoretical framework was the unified theory of acceptance and use of technology (UTAUT). This study employed a cross-sectional survey design using a modified UTAUT instrument, which captured quantitative data from 82 participants. The use of hierarchical multiple regression to analyze the data revealed that teachers' BYOD adoption could expand by increasing facilitating conditions, performance expectancy, effort expectancy, and decreasing perceived risk. This study reduces the gap in the literature about the unified theory of acceptance and use of technology and BYOD in the Caribbean and the Cayman Islands. It also provides evidence that perceived risk can increase its explanatory power of the unified theory of acceptance and use of technology. The study also contributes to a positive social change by revealing critical issues that administrators should address when devising BYOD policies and planning educational technology integration.

State of the art conductivity equipment has been used to measure deuterium isotope effects on the molar conductivity of strong electrolytes in the temperature range of 298 K to 598 K as a means of exploring solvation effects under hydrothermal conditions. Individual ionic contributions were determined by extrapolation of published transference number data to elevated temperature. The temperature dependence of the Walden product ratio indicates that there is little difference in the transport of ions between light and heavy water . Excess conductivity observed in hydrogen and deuterium compounds arising from proton hopping in hydrogen-bonded networks has been determined in the temperature range of 318 K to 598 K for the first time

No description available.

Dans la présente recherche, l’influence humaine et climatique des 1500 dernières années sur quatre lacs de Nouvelle-Angleterre (États-Unis) a été reconstituée par l’analyse des diatomées fossiles provenant des sédiments. Différentes méthodes ont été testées pour inférer certaines variables environnementales à l’aide des diatomées. Les méthodes des moyennes pondérées et de la probabilité maximale se sont avérées les plus appropriées pour la reconstitution des variables du gradient principal, tandis que les réseaux neuronaux artificiels et la probabilité maximale sont préférables pour les variables du gradient secondaire. Différentes transformations des données sont appropriées pour chacune des méthodes. Les diatomées fossiles des lacs ont enregistré un patron régional propre à la déforestation suite à la colonisation par les Européens. Malgré le rétablissement des forêts autour des sites depuis 1900 AD, trois lacs montrent à l’état actuel des conditions qui ne correspondent pas à celles de la période avant-perturbation. Ceci est dû aux caractéristiques locales des sites, tels que l’évolution naturelle des lacs, les perturbations naturelles (ouragans), ainsi que le développement des marais. Pour rétablir l’état « naturel » théorique envisagé dans la restauration, il est donc important de tenir compte de l’évolution naturelle des lacs. Au lac Walden Pond (Massachusetts), un enrichissement accéléré en nutriments a été inféré suite à l’usage récréatif intensif depuis env. 1950 AD. Depuis 1975 AD, le taux d’eutrophisation a diminué grâce aux mesures de gestion. L’état naturel du lac reconstitué par notre étude représente un bon guide pour les futurs mesures de gestion. Au lac Levi Pond (Vermont), une tendance accrue à l’humidité pendant les dernières 2000 années, qui correspond au refroidissement global du Néoglaciaire, a été inférée par les diatomées. Les diatomées sont donc d’une utilité potentielle pour les études paléohydrologiques dans les régions tempérées. L’analyse mensuelle de la flore diatomifère dans Bates Pond (Connecticut), a indiqué que les assemblages sont liés à la stratification, ce qui a permis d’identifier une période de mélange prolongée dans le passé à partir des assemblages fossiles. Le maximum de productivité diatomifère en automne indique que c’est la saison privilégiée pour l’échantillonnage d’eau en vue du développement des modèles d’inférence. Cette thèse apporte des nouvelles connaissances sur l’évolution et l'écologie des lacs en Nouvelle-Angleterre, et sur deux aspects méthodologiques pertinents pour la discipline de la paléolimnologie. / The human and climatic impact on four New England lakes was reconstructed by analysis of fossil diatoms preserved in lake-bottom sediments. Different diatom-based methods for the reconstruction of environmental variables (pH, total phosphorus, alkalinity) were tested. Weighted averaging and Gaussian logit regression were the most appropriate methods for the reconstruction of variables representing the principal gradient, whereas artificial neural networks and Gaussian logit regression performed better for secondary gradient variables. It was shown that different data transformations may be useful for different reconstructions. Fossil diatom assemblages of the sites recorded a regional pattern of deforestation and agricultural activity following European settlement. Despite the re-establishment of forests in the lake watersheds since 1900 AD, three lakes did not return to pre-disturbance conditions. This is due to local site characteristics, such as natural lake evolution, local natural disturbance patterns (hurricanes), and peatland development. It is therefore important to consider the natural dynamics of lakes when establishing the theoretical « natural » state for restoration purposes. At Walden Pond, Massachusetts, an accelerated nutrient enrichment was inferred from 1950 AD onwards, related to intensive recreational use of the lake. Since 1975 AD, the rate of eutrophication has diminished after management measures were implemented. The natural state of the lake reconstructed by this study represents a useful benchmark for future management decisions. In Levi Pond, a trend of increasing humidity during the past ca. 2000 years has been inferred by diatoms, corresponding to the period of Neoglacial cooling. This result indicates that diatoms may be a useful tool for future paleohydrological studies in temperate regions. The seasonal study of diatoms in Bates Pond, Connecticut, indicated that diatom assemblages are strongly influenced by stratification, which helped to identify a period of prolonged full-circulation in the past based on the fossil assemblages of the same lake. The maximum diatom productivity in autumn indicated that this is the most appropriate season for taking water samples for diatom inference model development. This thesis has provided new knowledge of the evolution of New England lakes before and after European settlement and on two pertinent methodological aspects of paleolimnologic study.

Submitted by PPG Comunica??o Social (famecos-pg@pucrs.br) on 2018-04-24T10:42:22Z No. of bitstreams: 1 RAFAEL_ROSINATO_VALLES_TES.pdf: 4997803 bytes, checksum: 305c1c0d476913fdfc9c6514f3196432 (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-05-07T18:51:24Z (GMT) No. of bitstreams: 1 RAFAEL_ROSINATO_VALLES_TES.pdf: 4997803 bytes, checksum: 305c1c0d476913fdfc9c6514f3196432 (MD5) / Made available in DSpace on 2018-05-07T19:29:39Z (GMT). No. of bitstreams: 1 RAFAEL_ROSINATO_VALLES_TES.pdf: 4997803 bytes, checksum: 305c1c0d476913fdfc9c6514f3196432 (MD5) Previous issue date: 2018-03-19 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / This thesis carries out a study of the diary in the work of Jonas Mekas, throughout three formats: the written diary, the diary-film and the video diary. The aim is to analyze how Mekas?s work contributes to an understanding of the diary as a narrative form, and how the author constructs his process of self-representation by means of the diaries. This work seeks to establish a definition for the diary, by means of theoretical references related to the spheres of literature (Braud, 2006; Simonet-Tenant, 2004; Girard, 1986; Lejeune, 2015; Blanchot, 2005) and of audiovisual work (James, 2013; Renov, 1996). As object of study, we analyze the book I had nowhere to go (1991), the diary-films Lost Lost Lost (1976), Walden ? Diaries, Sketches & Notes (1969), Reminiscences of a Journey to Lithuania (1972), and video diaries from the 365 Day Project (2007). This thesis takes weavings (Daney, 2007; Benjamin, 1994) and rends (Daney, 2007; Didi-Huberman, 2014, 2015) as its methodology, grounding itself on the way in which Mekas elaborates his narrative choices and his historical condition. We conclude that Mekas?s work points to an understanding of the diary not solely as literary genre, but as a narrative that affirms itself in a plurality of forms, following the shifts done by the author in his relation to time, space, and the use of different technical devices. We also conclude that Mekas, in his diaries, builds an intrinsic relation between narrating the lived and living the narrated, which reveals how the diaries not only document a certain socio-historical context, but are also themselves part of that context and of the subjectivity built by their author. / Esta tese realiza um estudo sobre o di?rio, que aparece na obra do cineasta Jonas Mekas em tr?s formatos: o di?rio escrito, o filme-di?rio e o v?deo-di?rio. O objetivo ? analisar como essa obra contribui para um entendimento sobre o di?rio enquanto forma narrativa e como o autor constr?i o seu processo de autorrepresenta??o por meio dos di?rios. Este trabalho procura construir uma defini??o de di?rio, a partir de referenciais te?ricos relacionados ao ?mbito liter?rio (Braud, 2006; Simonet-Tenant, 2004; Girard, 1986; Lejeune, 2015; Blanchot, 2005) e audiovisual (James, 2013; Renov, 1996). Como objetos de estudo, s?o analisados o livro I had nowhere to go (1991), os filmes-di?rio Lost Lost Lost (1976), Walden ? Diaries, Sketches & Notes (1969), Reminisc?ncias de uma viagem para a Litu?nia (1972) e os v?deos-di?rio pertencentes a 365 Day Project (2007). Esta tese assume como metodologia os conceitos de teceduras (Daney, 2007; Benjamin, 1994) e rasgaduras (Daney, 2007; Didi-Huberman, 2014, 2015), a partir da forma como Mekas realiza as suas escolhas narrativas e apresenta a sua condi??o hist?rica. Este trabalho conclui que a obra em pauta aporta um entendimento sobre o di?rio n?o somente como um g?nero liter?rio, mas como uma narrativa que se afirma na sua pluralidade de formas, de acordo com os deslocamentos que o autor efetua na sua rela??o com o tempo, com o espa?o e com o uso de diferentes dispositivos t?cnicos. Tamb?m conclui que Mekas constr?i, nos seus di?rios, uma rela??o intr?nseca entre narrar o vivido e viver o narrado, o que revela como os registros documentam um determinado contexto s?cio-hist?rico e, ainda, como esses registros fazem parte do pr?prio contexto e da subjetividade constru?da pelo seu autor.

This dissertation utilizes theories of deviance in conjunction with literary methods of reading and analyzing to study a range of deviant or transgressive characters in American literature of the 1840s and 50s. I justify this methodology on the basis of the intersecting and related histories of Emersonian self-reliance and deviance in American thought. I contend that each of the texts of self-reliance discussed by the dissertation – The National Police Gazette (1845-present), Frederick Douglass’ Narrative of the Life of Frederick Douglass (1845) and My Bondage and My Freedom (1855), Margaret Fuller’s Woman in the Nineteenth Century (1845), Henry David Thoreau’s “Civil Disobedience” (1849) and Walden (1854), and Nathaniel Hawthorne’s The Scarlet Letter (1850) and The Blithedale Romance (1852) – actually sanctions deviance. Since deviance is endorsed by these texts in some shape or form, it is a critical component of American culture; consequently American culture is one that promotes deviance. My work on Douglass and Thoreau employs the sociological theories of Robert K. Merton (1949) to investigate the tensions between the culturally lauded goal of self-reliance and the legitimate means for securing this. I explore the importance of Transcendentalist self-reliance to the American Dream ethos and the ways in which it is valorized by each protagonist. The work on the National Police Gazette puts popular and elite forms of literary discourse into conversation with one another. My primary concern here is with explaining why and how specific self-reliant behaviours are deemed “deviant” in the literary context, but “criminal” by popular works. The chapters on female deviance elucidate the confines of women’s writing and writing about women as well as the acceptable female modes of conduct during the nineteenth century. They also focus on the ways female characters engaged in deviance from within these rigid frameworks. A functionalist interrogation of female deviance underscores the ways society is united against those women who are classed as unwomanly or unfeminine. My conclusion seeks to reinvigorate the conversation regarding the intersection between literature and the social sciences and suggests that literature in many ways often anticipates sociological theory. Ultimately, I conclude by broadening the category of the self-reliant individual to include, for instance, females and African-American slaves who were otherwise not imagined to possess such tendencies. Thus, this dissertation revises notions of Emerson’s concept of self-reliance by positioning it instead as a call to arms for all Americans to engage in deviant or socially transgressive behaviour.

This dissertation utilizes theories of deviance in conjunction with literary methods of reading and analyzing to study a range of deviant or transgressive characters in American literature of the 1840s and 50s. I justify this methodology on the basis of the intersecting and related histories of Emersonian self-reliance and deviance in American thought. I contend that each of the texts of self-reliance discussed by the dissertation – The National Police Gazette (1845-present), Frederick Douglass’ Narrative of the Life of Frederick Douglass (1845) and My Bondage and My Freedom (1855), Margaret Fuller’s Woman in the Nineteenth Century (1845), Henry David Thoreau’s “Civil Disobedience” (1849) and Walden (1854), and Nathaniel Hawthorne’s The Scarlet Letter (1850) and The Blithedale Romance (1852) – actually sanctions deviance. Since deviance is endorsed by these texts in some shape or form, it is a critical component of American culture; consequently American culture is one that promotes deviance. My work on Douglass and Thoreau employs the sociological theories of Robert K. Merton (1949) to investigate the tensions between the culturally lauded goal of self-reliance and the legitimate means for securing this. I explore the importance of Transcendentalist self-reliance to the American Dream ethos and the ways in which it is valorized by each protagonist. The work on the National Police Gazette puts popular and elite forms of literary discourse into conversation with one another. My primary concern here is with explaining why and how specific self-reliant behaviours are deemed “deviant” in the literary context, but “criminal” by popular works. The chapters on female deviance elucidate the confines of women’s writing and writing about women as well as the acceptable female modes of conduct during the nineteenth century. They also focus on the ways female characters engaged in deviance from within these rigid frameworks. A functionalist interrogation of female deviance underscores the ways society is united against those women who are classed as unwomanly or unfeminine. My conclusion seeks to reinvigorate the conversation regarding the intersection between literature and the social sciences and suggests that literature in many ways often anticipates sociological theory. Ultimately, I conclude by broadening the category of the self-reliant individual to include, for instance, females and African-American slaves who were otherwise not imagined to possess such tendencies. Thus, this dissertation revises notions of Emerson’s concept of self-reliance by positioning it instead as a call to arms for all Americans to engage in deviant or socially transgressive behaviour.