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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.
31

El uso de adjetivos pre- y posnominales en  el discurso coloquial de hablantes no nativos / Non-native speakers’ use of post-nominal and pre-nominal adjectives in colloquial speech

Wikström, Joakim January 2018 (has links)
El propósito de la presente monografía es investigar si un grupo de hablantes no nativos de español, todos de nivel muy avanzado, usan los adjetivos modificadores en su discurso espontáneo de una manera parecida a la nativa, y más particularmente en qué medida los colocan de manera idiomática delante o detrás del substantivo. El material usado consiste, por un lado, de entrevistas, en las cuales los participantes cuentan de sus propias vidas, y por el otro lado, de una tarea en la que comentan la acción en un videoclip de la película Tiempos Modernos (de Charlie Chaplin). Los participantes del estudio son diez suecos que residen en Chile desde hace por lo menos 5 años. La hipótesis es que, dada una constatada tendencia conservadora general en los hablantes de una segunda lengua que los llevaría a “ir por lo seguro“, los sujetos sobreusarían la opción no marcada, o sea, la posposición, en la colocación de los adjetivos. Los adjetivos están categorizados en dos grupos: uno de adjetivos cotidianos que tienden a anteponerse al sustantivo (bueno, malo, pequeño, grande, pobre, puro, nuevo, viejo, alto), y los restantes adjetivos, que por defecto aparecen en posición posnominal (p.ej. laboral, sueco, libre, desnudo, rápido, cultural, blanco, redondo, privado etc.). Los resultados no apoyan la hipótesis, en el sentido de que los participantes no nativos tienden a sobreusar la posposición. Estos participantes son comparados con un grupo de control que consiste de diez hablantes de español L1 que residen en Chile. Un aspecto que discrepa en el grupo de hablantes no nativos es el uso del adjetivo grande, para el cual los no nativos prefieren la posposición. También destaca el hecho que los participantes nativos son más propensos a usar adjetivos en general en comparación con el grupo no nativo. / The purpose of this thesis is to investigate to what extent a group of non-native Spanish speakers, all of whom are highly proficient users of L2 Spanish, use modifying adjectives in spontaneous discourse in a targetlike manner and, particularly, to what extent they place them idiomatically before or after the noun. The corpus used consists of interviews, in which the subjects talk about their lives, and another task in which they comment the action of a videoclip from the movie ‘Modern Times’ (by Charlie Chaplin). The subjects of the study are ten Swedes that have lived in Chile for at least 5 years. The assumption being the tendency for second language speakers to be generally conservative and choose to ‘go for what's safe’, it is hypothesized that the L2 users would overuse the unmarked option for placing adjectives, namely after the noun. The adjectives are divided into two categories: one consisting of everyday adjectives that strongly tend to be placed ahead of the noun (bueno, malo, pequeño, grande, nuevo, pobre, puro, viejo, alto) and the other of adjectives that appear in postposition by default (e.g. laboral, sueco, libre, desnudo, rápido, cultural, blanco, redondo, privado etc.). The results don’t support the hypothesis, in the sense that the non-native participants tend to overuse postposition. The L2 participants have been compared to a control group consisting of ten L1 Spanish speakers living in Chile. One aspect that differs in the non-native group is the use of grande, for which the non-native speakers, unlike the natives, prefer postposition. What also stands out is the fact that native speakers are more prone to using adjectives in general compared to the non-native group.
32

Ractopamina na alimentação da tilápia do Nilo / Ractopamine on feed Nile Tilapia

Tovo Neto, Aldo 28 February 2013 (has links)
Made available in DSpace on 2017-07-10T18:13:12Z (GMT). No. of bitstreams: 1 Aldo Tovo Neto.pdf: 648463 bytes, checksum: b133940cbe853e6bbd59b51fbcfa544e (MD5) Previous issue date: 2013-02-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The aim of the study was to evaluate ractopamine increasing levels (0, 4, 8, 12 and 16 mg kg-1) as an additive in diet of Nile tilapia (Oreochromis niloticus) in final growout period (750-920 g), during 38 days of feeding. The fishes (400) were distributed in 20 experimental units in a completely randomized design with five treatments and four replications. Were evaluated: the morphometric relations, growth performance, beef cuts yield and chemical composition of fish flesh and organs. The results were submitted to analysis of variance (ANOVA) with multiple comparisons of means (Tukey). Ractopamine is a feed additive with potential for use in diets for Nile tilapia, 8 mg kg-1 did not cause any decrease in performance parameters and demonstrated positive effect in reducing fat content of abdominal muscles to growout period (750-920 g). / O objetivo do estudo foi avaliar a inclusão da ractopamina como aditivo na dieta da tilápia do Nilo (Oreochromis niloticus), no período final de engorda (750 a 920 g), em níveis crescentes de inclusão (0, 4, 8, 12 e 16 mg kg-1) durante 38 dias de alimentação. Foram distribuídos 400 peixes em 20 unidades experimentais, em um delineamento inteiramente casualizado com cinco tratamentos e quatro repetições. Foram avaliados: as relações morfométricas, desempenho zootécnico, rendimento de cortes e composição química da carne e órgãos dos peixes. Os resultados obtidos foram submetidos à análise de variância (ANOVA) com teste de comparação múltipla de médias (Tukey). A ractopamina é um aditivo com potencial para a utilização em rações para a tilápia do Nilo, e o nível 8 mg kg-1 não causou nenhum decréscimo nos parâmetros de desempenho e demonstrou efeito positivo na redução do teor de gordura da musculatura abdominal no período final de engorda (750 a 920 g).
33

Comportamiento Óptico y Térmico de un Concentrador Solar Lineal con reflector estacionario y Foco Móvil

Pujol Nadal, Ramon 30 July 2012 (has links)
El concentrador solar Fixed Mirror Solar Concentrator (FMSC) apareció en los años 70 con la finalidad de reducir costes en la producción de energía termoeléctrica. Este diseño consiste en un concentrador de reflector estacionario y foco móvil, presenta buena integrabilidad en cubiertas, y es capaz de alcanzar temperaturas entre 100 y 200ºC manteniendo una eficiencia aceptable. En esta tesis se expone una metodología para determinar el comportamiento del FMSC. Se ha desarrollado una herramienta de cálculo basada en el método de ray-tracing, que simula el trazado de los rayos solares en el sistema óptico. Con esta herramienta se ha analizado el comportamiento óptico y térmico del FMSC, y de la versión con espejos curvos Curved Slats Fixed Mirror Solar Concentrator (CSFMSC). Se ha realizado un análisis paramétrico para conocer la influencia de los distintos parámetros en el modificador de ángulo (IAM), y para obtener los diseños óptimos a una temperatura de 200ºC para tres climas en diferentes latitudes. Se han comparado los valores teóricos obtenidos mediante ray-tracing con dos prototipos ensayados, obteniendo un buen ajuste en ambos casos. Los ensayos han sido utilizados para determinar la curva de rendimiento de uno de los prototipos. Se ha hecho uso del método propuesto en la norma EN-12975-2:2006, combinado con valores de IAM obtenidos mediante ray-tracing. Se prueba que esta combinación puede ser útil para obtener la curva de rendimiento de colectores complejos con un modelo biaxial para el IAM. / The Fixed Mirror Solar Concentrator (FMSC) appeared during the 70s with the aim of reducing costs in the production of electricity in solar thermal power plants. This design consists of a concentrator with fixed reflector and moving receiver, has a very good integrability into building roofs and can reach temperatures between 100 and 200ºC with an acceptable efficiency. In this Thesis a methodology is presented for the determination of the behaviour of the FMSC. A simulation tool based on the forward ray-tracing method has been developed. The optical and thermal behaviour of the FMSC and its curved mirror variation called the Curved Slats Fixed Mirror Solar Concentrator (CSFMSC), have been analyzed with this tool. A parametric analysis has been carried out in order to determine the influence of the different parameters on the Incidence Angle Modifier (IAM) and to determine the optimal designs at a temperature of 200ºC for three different climates at different latitudes. The theoretical values obtained from the ray-tracing code have been compared with two experimental prototypes. The experimental and numerical results obtained show a good fit. The efficiency curve of one of the prototypes has been determined from the experimental tests. The methodology proposed in the norm EN-12975-2:2006 has been used in combination with IAM values obtained by ray-tracing. It has been shown that this combination can be effectively used to obtain the efficiency curve of complex collectors with a bi-axial IAM model.

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