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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Assessment of ventricular morphology using echocardiography in Ornate tinamous (Nothoprocta ornata) and domestic chickens (Gallus domesticus)

Backlund, Emma January 2014 (has links)
The Ornate Tinamou (Nothoprocta ornata), an ancient bird, has adapted to life at high altitude (>2.400 m.a.s.l) for a longer period than the domestic chicken (Gallus domesticus), which came to South America with the Spanish conquerors. Ornate tinamous have a smaller heart in relation to body size than domestic chickens. This study was made to evaluate heart morphometric measurements comparing Ornate Tinamou and domestic chicken using echocardiography measurements to determine wall thickness and chamber size and to evaluate whether it can retrieve measurements consistent with previous results on dissected hearts. I was also interested in evaluating potential adaptations of the Ornate Tinamou to life in hypoxic environments by exposing the heart to positive inotropic stimulation. The results were compared with those previously obtained on dissected hearts. The results showed that the chamber size of the domestic chicken was significantly larger than in Ornate Tinamou, both in conscious and anesthetized birds. Injection of 1µg/kg isoproterenol caused domestic chickens’ systolic chamber size to decrease significantly and fractional shortening to increase significantly. The same changes were seen in the Ornate Tinamou but they were not significant. In conclusion, this study confirms that echocardiography is a valid method for retrieving cardiac measurements without euthanizing animals, opening for the possibility of taking several measurements at different ages.
2

Lumensecity: Objects Illuminated in Time

Keller, Kourtney 05 August 2010 (has links)
This thesis explores the evolution of my work in graduate school. Upon entering into this course of study my artistic expression was polarized into realms of 2 and 3-Dimensional tactile works and experiments in 4-Dimensions (time) in the form of animations and short films. The content and context of these works have interwoven but their presentations remained polarized. In my masterʼs studies I have attempted to synergize the mediums of my artworks in order to achieve more realized and formal presentations. Following this course, I hope for my work to further evolve.
3

Cardiorespiratory responses upon increased metabolism in the Ornate Tinamou, Nothoprocta ornata

Gasparini, Isabella January 2012 (has links)
The Bolivian Ornate Tinamou, Nothoprocta ornata, lives higher than 3300 m above sea level and must constantly deal with a restricted availability of atmospheric oxygen, i.e., chronic hypoxia. Interestingly enough, the Ornate Tinamou has a small heart to body ratio, which implies a reduced ability in transporting oxygenated blood to the tissues. In order to increase knowledge about the cardiorespiratory response of the Ornate Tinamou, heart rate (HR) and ventilation frequency (VR) were monitored during resting at 25 °C. The values were compared with those obtained in conditions known to elevate metabolism, i.e., lowered temperature and graded exercise. This was later compared with domestic chickens, Gallus gallus. Results showed a significant increase in HR at 4 °C, 305 ±42 bpm in the Ornate Tinamou when compared with HR at 25°C, 241± 48 bpm (330 ±42bpm and 239 ±32bpm in chicken). A significant increase in VR was only observed in chicken. As expected, with a progressive increase in running speed, a significant increase in HR in both species was observed. At 1,5 km h-1, HR in the Ornate Tinamou was 327 ±5,6 bpm and 342 ±8,5 in chicken. At 3,0 km h -1 HR was 383 ±15 bpm and 404 ±7,9, respectively. However, HR was not significantly higher in the Ornate Tinamou than in chicken, indicating that there must be other physiological adaptations involved in the sufficient oxygen delivery to tissues, e.g. a high blood oxygen affinity or a preference for anaerobic metabolism due to living in a chronic hypoxic environment.
4

Orlando di Lasso's Missa Ad Imitationem Moduli Doulce Memoire: An Examination of the Mass and its Model

Hanson, Jan 08 1900 (has links)
Orlando di Lasso is regarded as one of the great polyphonic masters of the Renaissance. An international composer of both sacred and secular music, his sacred works have always held an important place in the choral repertory. Especially significant are Lasso's Parody Masses, which comprise the majority of settings in this genre. The "Missa Ad Imitatiomem Moduli Doulce Memoire" and its model, the chanson "Doulce Memoire" by Sandrin, have been selected as the subject of this lecture recital. In the course of this study, the two works have been compared and analyzed, focusing on the exact material which has been borrowed from the chanson. In addition to the borrowed material, the longer movements, especially the Gloria and the Credo, exhibit considerable free material. This will be considered in light of its relation to the parody sections. Chapter One gives an introduction to the subject of musical parody with definitions of parody by several contemporary authors. In addition, several writers of the sixteenth century, including Vicentino, Zarlino, Ponzio, and Cerone are mentioned. Chapter Two relates biographical information on Lasso and gives a brief summary of his compositions. Attention is given to the number and type of Parody Masses by Lasso. Chapter Three discusses Sandrin and the chanson model, "Doulce Memoire." The original French text, an English translation, and form of the chanson are given. Chapter Four gives a detailed analysis of the "Missa Doulce Memoire" illustrating the use of borrowed material on specific sections of the Mass. The free sections of the Mass are discussed and compared with the parody sections. Other compositional devices, such as text painting, varied textures, and coloration are also mentioned. In Chapter Five, the "Missa Doulce Memoire" is compared to Lasso's other parody works and conclusions will be drawn concerning the composer's choice of material and treatment of the text, especially with regard to the free sections, the place of the Parody Mass in Lasso's ouevre. and their place in the modern choral repertory.
5

Ornamentación arquitectónica: del racionalismo al art Nouveau. Concreción en la arquitectura cartagenera del eclecticismo y el modernismo

García Córdoba, Miguel 12 March 2009 (has links)
La evolución de los planteamientos arquitectónicos tras el Barroco derivó, tras un complejo periodo de análisis, en una nueva arquitectura apoyada en unos condicionantes absolutamente nuevos. Criterios revisionistas, historicistas, técnicos o simplemente apoyados en la intencionalidad estética o expresiva dieron lugar a un nuevo estilo de difícil y, desde luego, amplia definición. A finales del XIX, también como respuesta a un largo periodo de indefinición y dogmatismos, surge el Art Nouveau.La ciudad de Cartagena presenta algunas notables singularidades en este último periodo que la hacen especialmente interesante en el campo de la ornamentación y estética arquitectónica. Sus condiciones económicas, geográficas y la personalidad de algunos de los arquitectos afincados, determinaron el desarrollo de un eclecticismo y modernismo singulares que acabaron por fundirse, generando a partir de los primeros años del siglo XX, un panorama estético digno de análisis. / The evolution of architectural approaches after the Baroque period resulted, after a complex period of analysis, in a new architecture supported by some entirely new constrains. Revisionism, historicist, technical or simply based on a aesthetic or expressive intentions criteria led to a new kind of style which was difficult to define. In the late nineteenth century, partly in response to a long period of uncertainty and dogmatism, emerged the Art Nouveau.In this period, the city of Cartagena presents some remarkable peculiarities which makes especially interesting in the field of aesthetic and architectural ornamentation. Its economic and geographic conditions, together with the personality of some of the architects settled, determined the development of a unique eclecticism and modernism that eventually merged, resulting, from the early twentieth century, in an aesthetic landscape worthy of analysis.

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