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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

Estudio de promoción de las Pymes chilenas y marcas sectoriales en Asia a través de las redes sociales: — caso China.

Astudillo Laureda, Eduardo, Mesa Astaburagua, Pedro January 2011 (has links)
El presente informe tiene como objetivo entregar alcances sobre la importancia de las redes sociales para los negocios y las oportunidades que se presentan en China para las pymes al actuar de manera conjunta como marca sectorial. Si bien el foco se centra en una de estas últimas, los datos y la información presentados puede ser utilizados por cualquier interesado que quiera comprender de mejor manera el comportamiento de los internautas chinos y hacia dónde se dirige la manera de hacer negocios. Al observar cómo otros países potencian su imagen frente al mundo, cobra relevancia la forma en que se logran las asociaciones y cómo los esfuerzos se aúnan para formar asociaciones público-privadas. Las marcas sectoriales son capaces de crear sinergia al agrupar sectores productivos, logrando así generar una imagen sectorial que puede alojarse bajo la marca paragua de Chile y aportar también de manera significativa a fortalecer la imagen del país. Justamente para aprovechar las oportunidades que presenta el gigante asiático es que se firmó el tratado de libre comercio entre Chile y China, consiguiendo desgravación arancelaria y acceso hacia un mercado con una población que bordea los 1300 millones de habitantes. El alcance de este trabajo apunta hacia las promociones de las pymes en China a través de las redes sociales, por lo que la segmentación realizada de sus usuarios y sus respectivos perfiles va en esa dirección. Es por esto que es esencial comprender que el crecimiento en el uso de internet y en específico de este tipo de medios, generará grandes oportunidades si se logra posicionar la imagen de Chile en el extranjero. Dado lo anterior, en los apartados presentados se logrará formar una imagen de quienes son los usuarios chinos de internet de acuerdo a sus ocupaciones, tipos de medios y nivel educativo, lo que finalmente se traducirá en una orientación sobre cuales medios elegir y en qué tipo de usuarios debe enfocarse la estrategia. Finalmente, la intención es que a través de una estrategia de promoción en redes sociales chinas, se puedan ampliar los objetivos de la marca sectorial “Chile a la Carta” para no simplemente invitar a posibles consumidores a probar sabores propios de la gastronomía chilena, sino que también llevar hacia ellos parte de ella.
2

The Role of Caloric Intake on Achilles Tendon Health in Pre-Professional Ballet Dancers

Smedley, Annie G. 22 April 2024 (has links) (PDF)
Background: Achilles tendinopathy is a common and debilitating condition among female ballet dancers due to the large repetitive loading forces placed on their Achilles tendons during rehearsals and performances. Tendon health problems in females are exacerbated by a lack of understanding about how energy availability influences tendons. Ballet dancers, as aesthetic athletes, are vulnerable to low energy availability and can enter a spectrum disorder, relative energy deficiency in sport, that consists of low energy availability (with or without disordered eating), menstrual cycle dysfunction, and low bone mineral density (BMD). Aims: 1) To investigate the relationship between insufficient caloric intake and Achilles tendon health in pre-professional ballet dancers. 2) To evaluate if symptoms of relative energy deficiency in sport such as low BMD and menstrual irregularity can be matched with Achilles tendon structural damage in pre-professional ballet dancers. 3) To analyze if there is a relationship between BMD and nutrition in pre-professional ballet dancers. Methods: 30 pre-professional ballet dancers were recruited. Over the course of a 16-week training and performance period, the dancers underwent four ultrasound imaging sessions and two MRI sessions investigating their Achilles tendons. They also underwent one full body DXA scan and completed four ASA24 dietary recall surveys. The dancers additionally filled out questionnaires describing their menstrual history and current Achilles tendon health. At the end of the study, dancers were organized into calorie sufficiency groups (sufficient or insufficient). Results: Within both calorie groups, the Achilles tendon was significantly thicker at the end of the study as compared to the start of the study (p=.046). Within both calorie groups, echogenicity was significantly higher at the first two ultrasound imaging sessions than it was at the last two (p<.05). Additionally, the calorie sufficient group's tendons had a significantly higher echogenicity than the calorie insufficient group at the first two ultrasound imaging sessions (p<.05). There were significantly more dancers in the calorie insufficient group that experienced changes to their menstrual cycle (p=.007). Conclusion: Participants in the calorie sufficient group had significantly more hyperechoic tendons than those in the calorie insufficient group at the start of the study, and all participants saw a significant drop in tendon echogenicity halfway through the study. The results of this study suggest that a better understanding of how average caloric intake affects tendon health in dancers is necessary in order to help treat and prevent AT injuries in this dance population.
3

Seleção e operação ótima de recursos energéticos distribuídos inseridos em uma microrrede de energia elétrica / Optimal selection and operation of distributed energy resources integrated in a smart migrogrid

Alvez, Cristian Adolfo 13 March 2015 (has links)
Made available in DSpace on 2017-07-10T17:11:49Z (GMT). No. of bitstreams: 1 2015 - Cristian Adolfo Alvez2.pdf: 870298 bytes, checksum: e905359b074a87b04a67ea5befb19f4c (MD5) Previous issue date: 2015-03-13 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The microgrids may be considered as small power systems that operate autonomously and automatically, using technologies linked to it known as distributed energy resources (DERs), being demand, one of this resources. These networks are characterized by intensive use of information, communication and automation technologies, allowing meet demand in form efficient and optimally. However, implement, expand and operate a microgrid brings various economic, technical and operational challenges that must be faced, being one of those challenges the selection and operation of DERs. Thus, this work presents an optimization model, with the objective of analyzing the impact of input parameters on the behavior of the variables involved in selection and operations of these resources. The uncertainties in demand and renewable resources were treated through a scenario tree while for risk estimation was used the value at risk (VaR). The mathematical formulation constitutes a mixed integer linear programming model that was implemented in GAMS language and solved by CPLEX solver. Through simulations was possible to observe the economic benefits that can be obtained through use of DERs, highlight the impact that can produce the intermittent nature of renewable resources on operating costs, and also evidence the importance to have information regards of risk in situations of uncertainty. The results of the simulations show the tool's features developed as an aid when decisions must be made regarding the deployment of DERs and the optimized energy management in a microgrid. As features to highlight, this model operates independently of the energy consumer profile and also allows to perform various analyzes with respect to the influence of the input parameters on the decision variables. / As microrredes podem ser consideradas como pequenos sistemas de potência que operam de maneira autônoma e automática, utilizando tecnologias, conectadas a elas, conhecidas como recursos energéticos distribuídos (REDs), sendo a própria demanda um desses recursos. Estas redes se caracterizam pelo uso intensivo de tecnologias de informação, comunicação e automação, permitindo atender a demanda de forma eficiente e otimizada. No entanto, implementar, expandir e operar uma microrrede traz consigo vários desafios econômicos, técnicos e operacionais que devem ser enfrentados, sendo um deles a seleção e operação dos REDs. Como consequência disso, neste trabalho apresenta-se um modelo de otimização para a seleção e operação de REDs, com o objetivo de analisar o impacto que provocam os diversos parâmetros de entrada no comportamento das variáveis envolvidas na seleção e modo de operação desses REDs. As incertezas na demanda e nos recursos renováveis foram tratadas através de uma arvore de cenários enquanto que para a estimação do risco se utilizou o valor em risco (VaR). A formulação matemática resultante se constitui em um modelo de programação linear inteira mista que foi implementado na linguagem GAMS e resolvido com o solver CPLEX. Através dos resultados de simulação foi possível observar os benefícios econômicos que podem obter-se mediante a utilização de REDs, assim como destacar o impacto que pode produzir a natureza intermitente dos recursos renováveis sobre os custos de operação e também evidenciar a importância de dispor informação do risco em situações de incerteza. Os resultados obtidos corroboram as funcionalidades da ferramenta desenvolvida como auxilio no momento de tomar decisões em relação à implantação de REDs e à gestão otimizada de energia em uma microrrede. Como característica a destacar do modelo, este opera independentemente do qual seja o tipo de demanda do consumidor e permite efetuar diversas análises a respeito da influencia dos parâmetros de entrada sobre as variáveis de decisão.

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