5,221 research outputs found
Alien Registration- Boudreau, Peter S. (Bingham, Somerset County)
No full texthttps://digitalmaine.com/alien_docs/8898/thumbnail.jp
A three-dimensional reactive transport model for sediments, incorporating microniches.
No full textMost reactive transport models have represented sediments as one-dimensional (1-D) systems and have solely considered the development of vertical concentration gradients. However, application of recently developed micro-scale and 2-D measurement techniques have demonstrated more complicated solute structures in some sediments, including discrete localized sites of depleted oxygen, and elevated trace metals and sulphide, referred to as microniches. A model of transport and reaction in sediments, that can simulate the dynamic development of concentration gradients occurring in 3-D, was developed. Its graphical user interface (GUI) allows easy input of user-specified reactions and provides flexible schemes that prioritise their execution. The 3-D capability was demonstrated by quantitative modelling of hypothetical solute behaviour at organic matter microniches covering a range of sizes. Significant effects of microniches on the profiles of oxygen and nitrate are demonstrated. Sulphide is shown to be readily generated in microniches within one centimetre of the sediment surface, provided the diameter of the reactive organic material is greater than one millimetre. These modelling results illustrate the geochemical complexities that arise when processes occur in 3-D and demonstrate the need for such a model. Future use of high-resolution measurement techniques should include the collection of data for relevant major components, such as reactive iron and manganese oxides, to allow full, multi-component modelling of microniche processes
Platform Rules: Multi-Sided Platforms as Regulators
No full textThis paper provides a basic conceptual framework for interpreting non-price instruments used by multi-sided platforms (MSPs) by analogizing MSPs as "private regulators" who regulate access to and interactions around the platform. We present evidence on Facebook, TopCoder, Roppongi Hills and Harvard Business School to document the "regulatory" role played by MSPs. We find MSPs use nuanced combinations of legal, technological, informational and other instruments (including price-setting) to implement desired outcomes. Non-price instruments were very much at the core of MSP strategies.Platforms, regulation, network effects, distributed innovation
Croissance et architecture du sapin baumier en réponse au broutement de l'orignal
No full textL’accroissement des densités en grands mammifères herbivores affecte la dynamique des forêts en réduisant la croissance et la survie des espèces consommées, ce qui se traduit par des pertes économiques et de biodiversité à l’international. Un programme de surveillance efficace de ces impacts nécessite une compréhension de l’effet de ces herbivores sur la croissance des plantes et de l’impact de la croissance différentielle imposé par leurs comportements sur la composition et la structure des forêts. Cependant, seulement quelques indicateurs écologiques permettent de mesurer efficacement cet effet sur la régénération forestière, notamment les suivis basés sur la morphologie des arbres. Pourtant, l’architecture végétale peut simplifier la morphologie des arbres broutés en utilisant leur réponse architecturale aux traumatismes (réitération) et servir d’outil de mesure pour quantifier précisément l’évènement de broutement et son effet sur la croissance en hauteur des arbres. Ce projet de maîtrise quantifie le retard en hauteur imposé aux sapins baumiers juvéniles (0.5–5 m) par l’orignal dans les aires de confinement hivernal (ravage) et propose une typologie morphologique, simple d’utilisation, qui permet de suivre l’effet du broutement sur la régénération des sapinières. Basée sur une analyse dendro architecturale, cette étude détaille les relations entre l’historique de broutement, la croissance en hauteur, la stratégie de réitération et la morphologie de sapins baumiers collectés dans la Seigneurie de Beaupré (Qc, CA). Les résultats de cette étude associent une diminution de la hauteur du tronc à une accumulation du broutement apical sur le tronc, puis associent ce retard d’élongation du tronc à plusieurs attributs morphologiques. Ces résultats me permettent de proposer un phytomètre mesurant l’effet du broutement sur la dynamique des forêts boréales, particulièrement dans les régions abondantes en ongulés et en sapins baumiers. Afin de faciliter l’établissement d’une gestion durable des forêts, les programmes nationaux et régionaux d’inventaires écoforestiers devraient intégrer une diversité d’indicateurs écologiques permettant d’inclure largement les interactions herbivores–forêt.The increase in density of large herbivorous mammals influence s forest dynamic s by altering the growth and survival of consumed species which led to substantial biodiversity and economic loss worldwide. A lack of knowledge about the effect of those herbivores on plant growth or the impact of differential growth imposed by herbivore behaviours on forest composition and structure limits the establishment of an effective survey program of the plant – herbivore systems. Only few ecological indicators, based on morphological monitoring, could efficiently measure those effects on the forest renewal, but they are time - consuming and imprecise. Tree architecture could simplify the browsed morphology of juvenile trees by using the prime architectural response of plant to physical trauma (reiteration) and serve as a tool to quantify precisely the browsing events and its effect on vertical growth of trees. This master project aims to quantify the stall in growth of juvenile balsam firs (0.5 – 5 m high) caused by moose in winter yards, and to produce a morphologically based, field - ready typology to monitor the effects of browsing on the regeneration of pure balsam fir stands. Using dendroarchitecture analyses, this study analyzed the relation between reconstructed browsing history, vertical growth, the reiteration strategy, and morphological at tributes using balsam firs collected in the Seigneurie de Beaupré ( Qc, CA ). The results indicated a negative relationship between height and the level of the cumulated apical browsing pressure on the trunk, and associate this stall in vertical growth to morphological attributes. I propose then a phytometer measuring the effects of browsing on the boreal forest dynamic where ungulates and balsam firs are abundant. The implementation of multiple ecological indicators within national and regional ecoforest survey programs would result in the formal inclusion of the herbivore – forest interactions, thereby facilitating the integrated and sustainable management of ungulates and forests
THE CATALOG OF AMERICAN WIND SYMPHONY ORCHESTRA COMMISSIONS UNDER ROBERT AUSTIN BOUDREAU FROM 1957 TO 2019
No full textThe American Wind Symphony Orchestra (AWSO) commissioned over 400 works from 1957 to 2019 under the direction of Robert Austin Boudreau with the C. F. Peters Corporation publishing about 200 works. In 2022, Boudreau donated the AWSO works to the University of Maryland Bands and were cataloged by the author of this dissertation with the assistance of Jeffrey Renshaw’s book The American Wind Symphony Commissioning Project: A Descriptive Catalog of Published Editions, 1957-1991 which catalogs 159 works. Discoveries were made to include 255 AWSO works not included in Renshaw’s book.This dissertation is divided into three parts. The first (Chapters 1 and 2) focuses on the history of AWSO, its commissioning project and general programming practices, funding and operations, and the key individuals who created and developed the ensemble over its 62-year history. The second part (Chapter 3) catalogs 255 AWSO works listing the instrumentation, important musical characteristics, program notes, and research resources. It is also intended to act as a supplement to Renshaw’s book for wind band and orchestra conductors searching for wind repertoire. The third part (Chapters 4-6) examines the potential limitations and marketability of the AWSO works as well as future research
Rate of growth of isolated bubbles in sediments with a diagenetic source of methane. (errata)
No full textObservation of bubbles in estuarine and coastal sediments indicates that bubbles at or below 10 cm depth grow on seasonal time scales (May-October). In order to determine the controls on this growth rate, we have constructed a diffusion-reaction model that accounts for the dynamics of methane formation, its diffusion through pore waters, its incorporation into a bubble, and the consequent growth of the bubble. The model produces an explicit equation for the radius of a growing bubble, R(t), with time using mean parameter values and under the assumption that the mechanics of the sediment response to growth can be neglected: [equation]. where w is the porosity, D is the tortuosity-corrected diffusivity, cg is the concentration of gas in the bubble, S is the rate of methanogenesis near the bubble, R1 is the half-separation distance between bubbles (R1 k R), c1 is the ambient CH4 concentration, c0 is the pore-water CH4 concentration at R, t is time, and R0 is the initial bubble radius, if not zero. The effects of the source S and supersaturation (c1 2 c0), thus, appear as separate contributing terms, and this formula can then be applied even in those cases where apparently c1 ≈ c0. The model is applied to three sediments where bubbles have been previously studied, i.e., Cape Lookout Bight (USA), White Oak River (USA) and Eckernfoörde Bay (Germany). In all three cases, using the site-specific time-averaged parameter values, the model predicts seasonal growth rates, consistent with the observations. Furthermore, the source term dominates the rate of growth at the first of these two sites, whereas diffusion from the ambient supersaturation dominates at the German location. Real bubbles may follow a more complicated growth history than predicted by the above equation because of the mechanical properties of sediments; nevertheless, the overall growth times are concordant with ultimate diffusion control. The effects of rectified diffusion, that is, the pumping of gas into a bubble by pressure oscillations, e.g., from waves and tides, were also examined. Existing models for that process suggest that it is negligible, due to the low frequency of these types of oscillations
Histoire et Historicité, Intertextualité et Réception dans Louis Mailloux (1975) de Calixte Duguay et Jules Boudreau
No full textIn 1975, two Acadians, Calixte Duguay and Jules Boudreau, in order to commemorate the centenary of the Revolt of Caraquet, presented Louis Mailloux, an historical drama which was received with much acclaim and which was to return regularly to the stage. As with all historical fiction, this play implicitly proposes an interpretation of the gaps inherent in the recounting of events of history. The author of this paper does, however, point out therein an essential intertextuality with other nineteenth-century French-Canadian texts contemporaneous with the action of the play. In analyzing these texts, he elaborates a theory which permits him to determine how their structure allowed the Acadian playwrights to impose an original historical philosophy on their theatrical work. Contrary to what the title may suggest, this philosophy has less to do with the simple creation of a national hero than with the concept of a collective one.
Profitant du centenaire de la Révolte de Caraquet, les Acadiens Calixte Duguay et Jules Boudreau présentaient, en 1975, Louis Mailloux, drame historique qui obtiendrait un grand succès, et qui serait ensuite fréquemment repris à travers toute l'Acadie. Comme toute fiction historique, cette pièce propose implicitement une interprétation aux lacunes inhérentes à l'Histoire événementielle. Dans cet article, l'auteur y note toutefois une essentielle intertextualité avec d'autres textes canadiens-français du dix-neuvième siècle, contemporains de l'action de la pièce. Par l'analyse de ces textes, il élabore une théorie qui lui permet de déterminer comment la structure particulière de ces écrits avait permis aux auteurs acadiens d'imposer à leur oeuvre théâtrale une philosophie historique originale qui, contrairement à ce que le titre pouvait le laisser suggérer, s'éloignait de la notion de héros national pour se rapprocher plutôt du concept de héros collectif
Langue et légitimation : la construction discursive du locuteur francophone /
No full textIncludes bibliographical references.La construction discursive du locuteur francophone. Mise en perspective : l'exemple acadien / Laurence Arrighi et Annette Boudreau -- La fabrique du francophone. Une construction discursive / Jean-Marie Klinkenberg -- Les noms chiac et acadjonne chez le leguistes. Lorsque le discours ordinaire en vient à investir le discours expert / Cristina Petraș -- De la francophonie africaine comme formation discursive / Ozouf Sénamin Amedegnato -- "La langue de chez soi, ce n'est pas une chose imbécile..." Fluctuation des discours anti-francophones au Mali / Cécile Canut -- Pratiquex langagières légitimes et ethnicité : quels rapports? / Alexei Prikhodkine et David Correia Saavedra -- Chocolat suisse à la "franc̦aise." Instrumentalisation économique d'un capital local / Alfonso Del Percio -- Le héros cadien our comment sublimer le réel / Sylvie Dubois -- La construction discursive d'identités francophones individuelles et collectives en Roumanie / Olga Galatanu -- Auto-minorisation et poids des idéologies sur les pratiques linguistiques en Picardie / Fanny Martin et Gilles Forlot -- Évolution différentielle du franc̦ais : une interprétation écologique / Salikoko S. Mufwene
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