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2011 — An Examination of Leaf Morphogenesis In The Moss, Physcomitrella PatensRésumé
Physcomitrella patens is a simple model plant belonging to the bryophytes, which diverged from the tracheophytes approximately 500 million years ago. The leaves of the moss are similar in form to vascular plant leaves although leaves evolved independently in the bryophyte and tracheophyte lineages. Close examination of the morphology of Physcomitrella leaves and investigation of the morphogenetic processes that result in the leaf form and of the hormonal and genetic regulation of those processes will elucidate the evolutionary trajectory of moss leaves. Photomicroscopy and measurement of moss leaves were performed to provide detailed descriptions of leaves in strains of Physcomitrella … Lire la suite
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2011 — Natural Gas Development and Grassland Songbird Abundance in Southwestern Saskatchewan: The Impact of Gas Wells and Cumulative DisturbanceRésumé
The quantity and quality of remaining grasslands in southwestern Saskatchewan, Canada, are threatened by expansion of natural gas development. The number of natural gas wells nearly tripled between 1997 and 2007. Current management strategies do not consider the effect of natural gas development on grassland birds because the impacts are not known. I examined grassland songbirds and vegetation structure across an area with a gradient of gas-well densities to determine whether (1) density and proximity of gas wells influence abundance and occurrence of grassland songbirds or (2) the relative and cumulative effect of different types of anthropogenic disturbances associated with … Lire la suite
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2011 — Effects of Anthropogenic Urea on Lakes of the North American Great Plains: Ecological Implications Based on Experimental and Observational StudiesRésumé
Urea consumption has increased dramatically since the 1960s and now comprises over 50% of the nitrogen (N)-based fertilizer used globally. Currently, only 30-50% of N-fertilizers applied to cropland are effectively used by crops, while the remainder is lost to the environment. Urea is also a component of livestock and human wastes. In principal,export of urea to lakes as a consequence of human activities may exacerbate ecological problems associated with eutrophication (e.g. increased productivity of aquatic fauna, deep water anoxia, biodiversity loss, fish kills, etc.), especially in phosphorus (P)-rich aquatic ecosystems. Biweekly measurements of urea content and limnological variables (water chemistry, … Lire la suite
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2011 — Universal Mutual Responsibility: Heidegger, Selfhood, and the Possibility of an Ethics of CommunityRésumé
Martin Heidegger's treatise Being and Time, in seeking to answer the question of the meaning of Being, addresses the subject of the self and various problems relating to selfhood as component parts of his larger project. While addressing the subject of the self, however, Heidegger has overlooked many important considerations, specifically with regards to the way the self interacts with and depends upon its others. The end result of this is that Heidegger's understanding of the self throughout Being and Time carries with it both demonstrable inconsistencies and a number of propositions that require further investigation. This study, thus, has … Lire la suite
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2011 — Double-Crested Cormorant Feeding in Multiple Lake Environments: Intrinsic Markers Reveal Several Prey Sources and Frequent Site Switching by Breeding BirdsRésumé
Conflicts between piscivorous cormorants (Phalacrocorax spp.) and humans over fisheries resources occur worldwide. To determine the level of cormorant impacts on fisheries, fish biomass removals are estimated but typically assume only one source of prey near the roost or breeding colony. Cormorants can fly long distances (>30 km) to forage, possibly resulting in fish removal being spread out over several areas within large lakes, or among other bodies of water. I examined the diet and feeding locations of double-crested cormorants (Phalacrocorax auritus; hereafter cormorants) breeding in a multiple lake environment in north-central Saskatchewan, Canada. A majority of their diet … Lire la suite
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2011 — Tentativeness and Permeability in the Poitical Thought of Hannah ArendtRésumé
Hannah Arendt’s distinction between public and private rests upon a distinction between freedom and necessity that many have argued is ontological and thus immutable. This essay disputes that interpretation by discussing the tentative foundations of Arendt’s work on history and the human condition, in order to argue that this distinction stems not from a phenomenological essentialism but rather a meditation on historical forms of living-together that explicitly rejects notions of human nature and causality in history. This tentativeness stems from what Arendt regarded as the disastrous tendency of philosophy to systematize the chaos and disorder of human affairs, so that … Lire la suite
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2011 — An Effective and Critical History of Canada’s National Standardized Testing ProgramRésumé
This dissertation explores Canada‟s national large-scale testing program, the School Achievement Indicators Program (SAIP) and its successor, the Pan-Canadian Assessment Program (PCAP) using a methodology built on Foucault‟s theoretical concepts. The product of the research is a critical and effective history of the production of SAIP/PCAP within the Canadian social, political, and economic context. The study considers the work of Canadian scholars and commentators working in the field of largescale testing and the work of those working in aspects of education that are proximal to the field of interest. The research recognizes the key role of the investigator, the critical … Lire la suite
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2011 — 'Now You See Me, Now You Don't' - Service Delivery to Fetal Alcohol Spectrum Disorder (FASD) Offenders: A Study of Policy and Practice in Saskatchewan Community CorrectionsRésumé
FASD offenders involved in community corrections present a variety of challenges. One of the primary presenting challenges facing community corrections practitioners is how best to provide service to FASD offenders. What would the components of a service delivery program include in order to most effectively meet the needs of FASD offenders receiving services from Saskatchewan Community Corrections? Utilizing case study methodology, this research explores the intersection of present day service delivery practice and proposed future practices in supervising offenders as demonstrated by the Strategic Training Initiative in Community Supervision (STICS) project. Interview sampling of two sub-groups of research participants was … Lire la suite