To understand the communicative functions of any vocalization it is important to first classify, describe, and measure the elements of that vocalization. Mexican (Poecile sclateri) and boreal (P. hudsonica) chickadees both produce a name-sake chick-a-dee call. Here, the note types present in samples of Mexican and boreal chick-a-dee calls are identified and described. Frequency and temporal measures of each note type are analyzed and show that frequency measures may be useful for note-type and individual discrimination. Call syntax is also analyzed and shows that both Mexican and boreal chickadees produce the notes within their chick-a-dee calls in a fixed order with the potential for any note type to be repeated or omitted within the sequence. This work provides a foundation for future studies aimed at understanding the communicative significance of this call within these species, as well as for comparative work on the chick-a-dee call among all chickadee species.

No description available.

<p>Uppsatsen ingår i kursen Skapande svenska C, 30 hp inom ämnet Litteraturvetenskap vid Umeå Universitet.</p>

Tweedle-Dee and Tweedle-Dum is the first edition of a book for all audiences but especially targeting children. The story follows Tweedle-Dee and Tweedle-Dum as they explore wonderland, encountering famous characters including the Queen of Hearts, the Catepillar, the Mad Hatter, the March Hare, and the White Rabbit, as well as a set of new characters at well. The account is entirely fictional, and any character or event that bares any resemblance to a real person or something that happened in real life is completely and only a coincidence. I would like to give a special thanks to all my friends that helped in the writing process; I would write an extensive list, but not everyone has a facebook and I don't want to spell anyone's name wrong. Thanks guys. The book is meant to be a fun and light read; enjoy.

ABSTRACT The multi-disciplinary accelerator based facilities at iThemba LABS are used intensively for nuclear physics experiments, radiotherapy and the production of radioisotopes. To increase the beam intensity for radioisotope production and to improve the beam quality of the 66 MeV proton beam, a double-gap horizontal half-wave flat-topping resonator has been developed for the separated-sector cyclotron to operate at the associated fixed frequency. This type of flattopping resonator has never before been implemented in a cyclotron and this study is the first to show that it can be done, featuring a special characteristic not offered by other types. The resonator is reviewed against the other types of resonators that are already in use at other institutes around the world. The flat-topping voltage of the selected type has a sinusoidal half-wave distribution along a radial line in each of its acceleration gaps with the nodal points located on the injection and extraction orbits. The flat-topping voltage therefore progressively increases from zero at both of the two most critical orbits in a cyclotron to a maximum at about halfway between them. As a result will this resonator, apart from its basic function to reduce the energy spread in the beam, not decrease the orbit separation at the injection and extraction orbits in the cyclotron, as is the case with other types of flat-topping resonators. This advantageous feature implies that the beam pattern in the cyclotron is not affected in the regions of the delicate injection and extraction components and therefore will these components or the operational control of the beam not require any modification to accommodate the resonator. In order to design a resonator that will meet our requirements, the theory of the beam dynamics and resonator characteristics were studied to ascertain the expected improvement in beam quality and beam intensity when a flat-topping resonator is implemented with the cyclotron. All resonator types were considered and studied in terms of their power dissipation, voltage distribution, harmonic number, space requirements and influence on the beam. The horizontal half-wave resonator type, with two acceleration gaps, was selected as the most suitable for our application, because of its preferred electromagnetic characteristics and its geometric shape that permits the installation inside an existing vacuum chamber through an existing flange. Initially a half-scale resonator model was build to test the feasibility of such a resonator and also to verify the calculation methods. Transmission line methods and numerical field analysis in 3D were applied to determine the resonator characteristics. In the former method a computer program, POISSON, was used to calculate curvilinear squares on sections through a triangular-shaped transmission line and in the latter method a commercial computer program, SOPRANO, was used. SOPRANO is part of an internationally acclaimed suite of programs and the acquired knowledge and skill to use this state-of-the-art software for the studying and designing of such and other electromagnetic devices also put the institute amongst the front-runners in the world. The calculated characteristics of the half- and full-scale resonator models, the study of the different electromagnetic modes that resonate in close proximity to the required frequency, the heat transport modelling and the theory and implementation of the coupling and tuning devices are all in good agreement with their respective measured results and are reported in this document. This study lead the way to have the first-ever double-gap horizontal half-wave flat-topping resonator in a cyclotron successfully commissioned at iThemba LABS and the first tests with beam report very stable operation. Accelerator physicists now have another option to utilize for the establishing of flat-topped acceleration voltages.

Thesis (Ph. D.)--University of California, Riverside, 2009. / Includes abstract. Includes bibliographical references (leaves 189-195). Issued in print and online. Available via ProQuest Digital Dissertations.

De nombreux produits chimiques organiques usuels sont susceptibles de devenir instables lorsqu'ils sont stockés de manière inadéquate ou durant de longues périodes au contact de l'air. Ils peuvent réagir avec l'oxygène moléculaire, y compris { température ambiante, par un processus d'autoxydation (peroxydation), qui se déroule selon un mécanisme radicalaire de réactions en chaine. Ce processus mène { la formation d'espèces chimiques peroxydées, thermodynamiquement instables et reconnus responsables de nombreux accidents de laboratoire. La présence d'espèces radicalaires, de plusieurs chemins réactionnels et le fait que les produits de réaction soient souvent des mélanges de composés, rendent la caractérisation expérimentale du processus de peroxydation très difficile. L'objectif de cette thèse, qui s'intègre dans le cadre du programme de recherche RIPER (étude des RIsques liés { la PERoxydation des produits chimiques) de l'INERIS, a été l'étude, par des méthodes de modélisation moléculaire, du processus d'autoxydation d'une famille d'espèces facilement peroxydables, les éthers, afin d'identifier les risques accidentels liés { leur utilisation, notamment dans des conditions normales de stockage. Dans ce but, une étude mécanistique détaillée a été menée sur l'oxydation de l'éther diéthylique (DEE) en utilisant une double approche de modélisation moléculaire (DFT) et cinétique. Le mécanisme réactionnel identifié pour le processus ainsi que le modèle cinétique détaillé développé, démontrent que, la compétition entre la voie réactionnelle de décomposition du radical alkyle issu de l'étape d'initiation et celle d'isomérisation des radicaux peroxyde est au coeur du processus d'oxydation du DEE est et que, la prépondérance d'un chemin par rapport { l'autre, dépend de la concentration d'oxygène dissous dans le solvant. Ces deux approches complémentaires indiquent aussi que le risque accidentel lié à cet éther est dû { l'accumulation de certaines espèces peroxydées produites (hydroperoxydes notamment). Les voies réactionnelles principales caractérisées pour le processus d'oxydation du DEE ont ensuite été étudiées pour treize autres éthers aliphatiques. Les résultats ont mis en évidence un comportement commun des éthers vis-à-vis de leur oxydation et cela a permis d'évaluer les énergies en jeu dans les étapes clefs du processus pour toutes les espèces considérées en s'affranchissant d'une étude détaillée. Enfin, le mécanisme d'inhibition de l'oxydation du DEE par ajout d'espèces chimiques antioxydantes a également été examiné par modélisation moléculaire. Les résultats préliminaires démontrent que les antioxydants phénoliques sont les plus efficaces pour l'inhibition du processus et confirment que le BHT (hydroxytoluène butylé), qui est déj{ l'antioxydant le plus utilisé pour la stabilisation du DEE, est l'inhibiteur le plus performant parmi les 12 étudiés.

Thesis (Ph. D.)--University of California, Santa Cruz, 1993. / Typescript. Includes bibliographical references (leaves [238]-254).

Les Guides de Bonnes Pratiques Cliniques sont des documents normalisés destinés à l'amélioration de la qualité des soins. L'informatisation des Guides de Bonnes Pratiques est un enjeu majeur pour leur diffusion mais aussi pour les différentes étapes de leur cycle de vie depuis leur rédaction. De nombreux travaux de recherche ont été consacrés à l'informatisation des Guides de Bonnes Pratiques. Parmi eux, les approches documentaires utilisent les développements récents des langages à base de balises pour la structuration des documents, facilitant le traitement informatisé de ces documents. Nous proposons une extension de l'approche documentaire qui est basée sur une analyse intelligente des marqueurs de structuration des recommandations utilisant un analyseur à états finis. Cette approche a été intégrée à l'environnement informatique G-DEE (Guideline Document Engineering Environment) dédié à l'étude des Guides de Bonnes Pratiques, et peut servir pour une aide à la rédaction, un support au consensus lors de l'écriture, et un support pour la maintenance et l'actualisation des Guides de Bonnes Pratiques.

On January 8th, 2011 tragedy struck in Tucson, Arizona. A gunman opened fire on Representative Gabrielle Giffords' "Congress on Your Corner" event, wounding thirteen and killing six ("Arizona Shooting"). Four days later, President Obama spoke to a grieving crowd at the University of Arizona's McKale Memorial Center. This study seeks to demonstrate how the dramatistic process and the pentad provide insight into how Obama guides the nation through the process of relieving the guilt. Specifically, Obama's call for mortification instead of scapegoating as the means for victimage is examined in light of the context and organizational structure of the speech. In addition, a pentadic analysis of the speech is conducted, showing Obama's stress on the agent-agency ratio and a corresponding idealist-pragmatist outlook. Finally, conclusions are drawn about what this study adds to the academic literature on national eulogies, the presidency, and rhetorical studies at large. / Graduation date: 2012