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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

Estudo da influência dos acessórios no desempenho dos motores diesel turboalimentados / Study of the influence of accessories in the performance of turbo diesel engines

Oliveira, Marcelo Santana 16 August 2018 (has links)
Orientador: Franco Giuseppe Dedini / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-16T15:37:35Z (GMT). No. of bitstreams: 1 Oliveira_MarceloSantana_M.pdf: 5470520 bytes, checksum: 648b5d28ae39f23b5cb3aee6e6370c71 (MD5) Previous issue date: 2010 / Resumo: O motor Diesel é a fonte de potência primária de veículos comerciais (leves ou pesados), portanto deve-se dele conhecer, de forma abrangente, o desempenho em função da rotação e das condições de operação desejadas. A construção de um modelo teórico calibrado por medições experimentais de um motor Diesel permitirá testar e verificar a influência dos acessórios do motor em seu desempenho. O modelo deverá ser capaz de responder de forma semelhante ao sistema real, aos efeitos mecânicos e/ou às mudanças do sistema de controle do motor. Um dos aspectos fundamentais deste trabalho é a proposta de uma metodologia de testes e levantamento de parâmetros, para aspectos influentes e obtenção de valores de consumo especifico de combustível. O motor usualmente opera em condições transientes de rotações e cargas. Portanto, a potência do motor sempre deve corresponder ao funcionamento do veículo. O consumo de combustível dos veículos está diretamente relacionado com o consumo de energia que está implícito na dependência da velocidade ou no ciclo ao qual o motor for submetido. O enfoque deste trabalho está na influência dos acessórios no consumo especifico de combustível. O motor será tratado como um sistema fechado, onde os parâmetros de controle e ruídos do sistema ingressantes resultam em torque, potência e consumo específico de combustível fundamentalmente dependentes da velocidade angular do mesmo. Como a variação de carga dos acessórios altera estas relações, como o fazem e como pode ser possível absorver estas variações em prol do desempenho veicular fazem o escopo principal desta dissertação / Abstract: The Diesel engine is the primary source of power for commercial vehicles (light or heavy), so it should be known, comprehensively, the performance as a function of speed and the operating conditions that required. Construction of theoretical model calibrated to experimental measurements of a Diesel engine, will test and verify the influence of engine accessories in your performance. The model should be able to respond similarly to the real system, the mechanical effects and / or changes of the control system of the engine. One key aspect of this work is to propose a testing methodology and survey parameters, and influential aspects for obtaining values of specific fuel consumption. The engine operates usually transient speeds and loads. Therefore, the engine power must always match the operation of the vehicle. The fuel consumption of vehicles is directly related to the consumption of energy that is implicit in the velocity or cycle at which the engine is subjected. The emphasis of this work is the influence of accessories in specific fuel consumption. The engine is treated as a closed system, where the control parameters and noise entering the system results in torque, power and specific fuel consumption primarily dependent on the angular velocity of the same. As the variation in the fittings alter these relationships, as they do and how it may be possible to absorb these changes in support of vehicular performance are the main scope of this dissertation / Mestrado / Dinâmica / Mestre em Engenharia Mecânica
32

Evolução de produtos automotivos = o caso do conjunto espelho retrovisor externo / Evolution of automotive products : case of exterior rearview mirror assy

Silva, Márcio de Puccio 18 August 2018 (has links)
Orientador: Geilson Loureiro / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-18T21:49:50Z (GMT). No. of bitstreams: 1 Silva_MarciodePuccio_M.pdf: 12210927 bytes, checksum: 8717d3c5839c70dc9b151a499ce64821 (MD5) Previous issue date: 2011 / Resumo: Esta dissertação versa sobre a engenharia de um produto objeto de evoluções sucessivas. O produto em questão é o conjunto de espelho retrovisor externo de um automóvel. O processo de engenharia evolui do projeto de engenharia de um conjunto de peças a serem montadas para um processo de engenharia de sistemas que leva em conta outros processos do ciclo de vida como o próprio processo de projeto e o processo de fabricação, ou seja, também uma abordagem de engenharia simultânea. Ao longo de sua evolução, os stakeholders, os requisitos, as funcionalidades e a arquitetura de um conjunto espelho retrovisor mudaram. Até 1980, o projeto era orientado para o atendimento à regulamentação do mercado onde o veículo era comercializado. A partir daí, requisitos visando uma maior satisfação dos clientes passaram a ser considerados. O desafio atual é produzir um conjunto espelho retrovisor que atenda todos os requisitos durante todo seu ciclo de vida, desde sua concepção no início do projeto para viabilizar uma idéia ou forma do design até o seu descarte, preocupando-se com a utilização de materiais que possam ser facilmente reciclados. Esta dissertação reporta passos necessários para reduzir o peso dos retrovisores externos dos veículos a partir da utilização de um material com menor peso específico. A mudança no material, no entanto, traz consequências no seu comportamento em relação a resistência à vibração e intemperismo. Por isso, mudanças no processo de projeto e fabricação são necessárias. A conclusão é que evoluções futuras de produtos como o espelho retrovisor precisarão considerar desde o início do seu processo de desenvolvimento engenharia de sistemas e engenharia simultânea para a sua realização / Abstract: This dissertation is about the engineering of a product subject to successive evolution. The product in this case is an exterior rearview mirror assembly for vehicle. The engineering process evolves from the engineering design of an assembly set to a systems engineering process that takes into consideration other life cycle processes. Examples of these other life cycle processes are engineering design, testing and manufacturing. In order to take into consideration these other life cycle processes, the engineering process follows a concurrent engineering approach. Along its evolution, stakeholders, requirements, functionalities and the architecture of the exterior rearview mirror assembly have changed. Up to 1980, the design was oriented to meet market regulations. From there onwards, customer satisfaction started to matter. Nowadays, the challenge is to develop the product, from the outset, taking into consideration all of its life cycle processes, up to disposal, taking into consideration the materials that can be easily recyclable. This dissertation reports the steps necessary to reduce the weight of the external mirrors by using materials with lower density. However, the change in the material, affects resistance to vibration and intemperism. Therefore changes in design and in the manufacturing process are required. In conclusion, future evolution of products such as the exterior mirror needs to consider from the outset of product development the use of systems engineering and concurrent engineering approaches / Mestrado / Projetos / Mestre em Engenharia Automobilistica
33

Exquisite corpse : Exploring the methods of surrealism to challenge the hierarchies of body, dress and accessories

Larsson, Josefin January 2017 (has links)
Just as the surrealistic movement challenged our perception of reality, the present work applies surrealistic methods to challenge our preconceived hierarchies between body, dress, and accessory. Adding to past surrealistic work in fashion design, the present work does not only strive to create surrealistic expressions, but to enhance the creative process through surrealistic methods. Three surrealistic methods were tested: Entopic Graphomani, Frottage, and Exquisite Corpse. The methods ability to challenge hierarchies between body, dress, and accessory was assessed through their ability to result in an element of surprise. For the present work, Exquisite Corpse had the greatest potential. By using participant observation and an adapted version of Exquisite Corpse seven looks were developed. The present work concludes that the surrealistic methods can by used not only to develop surrealistic expressions, but also to enhance the creative process within fashion design.
34

Projeto térmico de fogão a álcool / Thermal project of alcohol stove

Simões, Sheila Grandinetti, 1981- 26 August 2018 (has links)
Orientador: Caio Glauco Sanchez / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-26T13:07:12Z (GMT). No. of bitstreams: 1 Simoes_SheilaGrandinetti_M.pdf: 2912915 bytes, checksum: d05a793ded2290cefd198b098da0f329 (MD5) Previous issue date: 2014 / Resumo: Este estudo teve como objetivo o projeto e a construção de um fogão doméstico alimentado continuamente por etanol, com a avaliação de rendimento de queima. O Brasil como o maior produtor de etanol, produzido a partir da cana-de-açúcar e elevado grau de desenvolvimento tecnológico, tornou esse combustível uma opção viável para substituição do GLP (gás liquefeito de petróleo) em fogões domésticos. Para a utilização do etanol foram necessários estudos para modificações tanto na forma de armazenamento, como no desenvolvimento de um novo design do queimador, visando uma queima compatível ao combustível já utilizado. Foram feitas análises termodinâmicas, a fim de descobrir os parâmetros mais relevantes na modificação. A partir dessas modificações foram desenvolvidos dois queimadores que se encaixam nas categorias semirrápido e auxiliar, com eficiências de 69% e 72% respectivamente, enquadrando ambos os queimadores na categoria A de eficiência / Abstract: This study aimed the project and built of a household stove fed continuously by alcohol fuel, evaluating burning efficiency. Brazil as the largest sugar-cane ethanol producer and with high technologic development degree, made this fuel a viable option to replace LPG (liquefied petroleum gas) in household stoves. For the utilization of ethanol, studies have been necessary both for the modification of storage and the development of a new burner¿s design, seeking a compatible burn with the already used fuel. Thermodynamics analyses have been made to discover the most relevant parameters for the modification.From these modifications, were developed two burners with efficiency of 69% and 72%, that fits onto the categories of semi-fast and auxiliary in brazilian norm, respectively, both in category A from brazilian norm of efficiency / Mestrado / Termica e Fluidos / Mestra em Engenharia Mecânica
35

MALLKU

Canales Pulache, Jose Daniel, Estrada Vargas, Manuel Esteban, Giraldo de la Cruz, Frank David, Leon Obando, Camila Lucia, Ruiz Diaz, Valeria 27 November 2019 (has links)
El presente trabajo de investigación se basa en una propuesta de negocio en la industria de accesorios musicales dirigida a personas que toquen guitarra y bajo, y que se encuentren entre los NSE A, B y C en Lima Metropolitana. Para investigar y validar varios supuestos, se ha creado la marca “Mallku”, una empresa que diseña uno de los accesorios más conocidos, pero, a la vez, difícil de encontrar en el mercado, el pedalboard. Este accesorio sirve como una herramienta que ordena los pedales que usan guitarristas y bajistas, y permiten ahorrar tiempo al poder llevarlos ya armados a una grabación o al escenario. A partir de las primeras investigaciones, se validó que hay un gran potencial para desarrollar este producto, que el consumidor valora los artículos artesanales, y que aprecia que se utilice madera como insumo principal. Por otro lado, se pudo validar la aceptación del producto a través de las ventas realizadas en redes sociales, llegando a vender estos accesorios a miembros de bandas que están en crecimiento y que ya son relevantes para la escena local. Para la realización del proyecto se hicieron diversos análisis de la industria, los cuales involucran al consumidor, insights, competidores y otros factores externos que permitieron elaborar diferentes planes y determinar una estructura organizacional favorable para la viabilidad del mismo. Como resultado, bajo una inversión inicial de S/. 39,227.00, se obtiene una utilidad neta de S/. 31,158.00 para el primer año, S/. 24,077.00 para el segundo y S/. 23,105.00 para el tercero. / This research work is based on a business proposal in the musical accessories industry aimed at people who play guitar and bass, and who are between socioeconomic levels A, B and C in Lima Metropolitana. To investigate and validate many hypothesis, we have created “Mallku”, a business that designs one of the best known products in the industry, the pedalboard. This accessory works by helping organize the pedals that guitar and bass players use, and allows to save time when the users need to record or give a concert. From the first investigations, it was validated that there is great potential to develop this product, that the consumer values ​handmade items, and that appreciates that wood is used as the main input. On the other hand, it was possible to validate the acceptance of the product through sales made in social networks, selling these accessories to members of bands that are growing and that are already relevant to the local scene. For the realization of the project, various analyzes of the industry were made, which involve the consumer, insights, competitors and other external factors that allowed developing different plans and determining a favorable organizational structure for its viability. As a result, under an initial investment of S /. 39,227.00, we expect to obtain a net profit of S /. 31,158.00 for the first year, S /. 24,077.00 for the second and S /. 23,105.00 for the third. / Trabajo de investigación
36

Rozvoj konkurenceschopnosti podniku v kontextu extenze značky / Development of Competitiveness of Company in the Context of Brand Extension

Vrána, Jan January 2017 (has links)
This diploma thesis aims on enhancing the competitiveness of the company IMI Partner a.s.. It consists in the proposal of marketing communication, which will serve to extension of the brand Pierre Cardin. The first part of the thesis contains the theoretical starting points concerning the brand, its identity and value, communication and extension of the brand. In the second, analytical part, the aspects of Pierre Cardin's brand life have been analyzed. In the last, proposal section, the proposal of Pierre Cardin's communication has been drawn up, including a timetable and sales forecast in order to enhance competitiveness of the company IMI Partner a.s..
37

Podnikatelský plán pro založení malého podniku / The Business Plan for Establishing of Small Company

Valenta, Roman January 2018 (has links)
This diploma thesis deals with the creation of a business plan. This plan is concerned with the startup of an online store which specializes in speakers, headphones and accessories. The thesis explores business plan theory and utilizes the SLEPTE, SWOT and McKinsey 7S analyses complemented by an analysis of my own research. Based on the above mentioned information, the business plan itself is drawn up.
38

Marketingový mix firmy New Brand, s.r.o. / Marketing Mix of Company New Brand, Ltd.

Kochanová, Veronika January 2011 (has links)
The diploma thesis focuses on create a marketing mix in the company New Brand, which deals with the adjustment of silk accessories. Specifies the various components of the marketing mix and business environment analysis. Proposes to extend the product range and focus on individual customers.
39

Analýza vhodných metod a postupů při ocenění sportovního studia / Analysis of appropriate methods and procedures in valuation of a sports center

Meluzínová, Lucie January 2015 (has links)
This thesis deals with the valuation of selected sports studies. My goal is to evaluate methods for the valuation of sports studies and establish appropriate criteria that could affect the returns of Sports Studies. The work also includes the design procedure in assessing whether it is for technical equipment for part or accessory sports studies.
40

Luxury value perceptions that drive South African female consumers' purchase intent for luxury exotic leather accesories

Scheepers, Sunette January 2016 (has links)
The study investigated South African female consumers' purchase intent for luxury exotic leather accessories, with specific reference to exotic crocodile leather, as well as their perceived values of luxury exotic leather products and brands. A survey was conducted across South Africa that included representation of the following ethnic groups: African, White, Coloured, Asian and Indian. All the individuals surveyed were female. Consulta Research, a consumer research company, assisted the research study in collecting data. Data was collected by means of a non-probability convenient sampling method. Consulta Research distributed an online questionnaire to female participants on their database. Three hundred and thirty seven (337) usable questionnaires were completed and returned. Data analysis consisted of descriptive statistics, exploratory factor analysis, Spearman's correlation analysis and Cohen's d correlation analysis. All of the demographic and lifestyle characteristics were useful in describing the South African female consumer. The findings indicated that the majority of the respondents were not willing to spend market-related prices for genuine crocodile leather accessories. The study confirmed that luxury value perceptions may include five dimensions that are distinguished in literature, namely Social, Individual gifts, Individual pleasure, Financial, and Functional value perceptions. Functional value perceptions were found to be more important to South African respondents, although previous studies in other countries have shown that Social and Individual value perceptions are more important. According to the literature presented in the study, it was confirmed that purchasing intent is part of the decision-making process, since intention is evident in an individual's readiness to perform a given behaviour. The findings showed that South African female respondents have a weak Purchasing intent for exotic crocodile leather accessories. The study, however, also showed that in the future at some point a substantial percentage of respondents might buy (24.00% + 18.60% + 20.70%), have the intention to buy (23.40% + 17.50% + 21.30%) and have an interest to buy (23.10% + 17.80% + 18.90%) an exotic crocodile leather accessory. A high practical significance was also found for the correlation between Purchasing intent and Functional value perceptions. This might be an indicator of the important role that functionality would play in respondents' final decision to buy or not buy an exotic crocodile leather accessory. This has implications for industry stakeholders because Functional value perceptions, according to the study, can be described as superior quality, quality assurance, high quality standards and substantive attributes and performance factors. Therefore industry stakeholders within the luxury exotic crocodile leather industry, be it suppliers, manufacturers, breeders, farmers, retailers or marketers, should take these consumer values into consideration in order to maximise the ultimate value delivered by the supply chain. Various recommendations are made based on the findings of this study, to either expand or build onto this existing research. Topics related to luxury exotic crocodile leather accessories and luxury consumers in South Africa can definitely be explored further to fill the current gap in knowledge in this field. / Dissertation (MConsumer Science)--University of Pretoria, 2016. / Consumer Science / MConsumer Science / Unrestricted

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