This report investigates if it is possible to use the Indian Buffet Process (IBP), a stochastic process that defines a probability distribution, as part of a recommendation system. The report focuses on recommendation systems where one type of object, for instance movies, is recommended to another type of object, for instance users.         A concept of performing link prediction with IBP is presented, along with a method for performing inference. Three papers that are related to the subject are presented and their results are analyzed together with additional experiments on an implementation of the IBP.        The report arrives at the conclusion that it is possible to use IBP in a recommendation system when recommending one object to another. In order to use IBP priors in a recommendation system which include real-life datasets, the paper suggests the use of a coupled version of the IBP model and if possible perform inference with a parallel Gibbs sampling. / Denna rapport undersöker om det är möjligt att använda Indian Buffet Process (IBP), en stokatisk process som definierar en sannolikhetsfördelning, som en del av ett rekommendationssystem. Rapporten fokuserar på rekommendationssystem där en sorts objekt, exempelvis filmer, rekommenderas till en annan sorts objekt, exempelvis användare.         Ett sätt att förutse länkar, link prediction, mellan olika objekt med hjälp av IBP presenteras tillsammans med en metod för att dra statistiska slutsatser, inference. Tre rapporter som är relaterade till ämnet presenteras och deras resultat analyseras tillsammans med ytterligare experiment på en implementation av IBP.        Rapporten drar slutsatsen att det är möjligt att använda IBP i ett rekommendationssystem då systemet rekommenderar ett objekt till ett annat objekt. Rapporten föreslår en kopplad version av IBP för att kunna använda IBP i ett rekommendationssystem som arbetar på riktigt data samt att inference ska utföras med en parallell Gibbs sampling.

L'apprentissage de dictionnaire pour la représentation parcimonieuse est bien connu dans le cadre de la résolution de problèmes inverses. Les méthodes d'optimisation et les approches paramétriques ont été particulièrement explorées. Ces méthodes rencontrent certaines limitations, notamment liées au choix de paramètres. En général, la taille de dictionnaire doit être fixée à l'avance et une connaissance des niveaux de bruit et éventuellement de parcimonie sont aussi nécessaires. Les contributions méthodologies de cette thèse concernent l'apprentissage conjoint du dictionnaire et de ces paramètres, notamment pour les problèmes inverses en traitement d'image. Nous étudions et proposons la méthode IBP-DL (Indien Buffet Process for Dictionary Learning) en utilisant une approche bayésienne non paramétrique. Une introduction sur les approches bayésiennes non paramétriques est présentée. Le processus de Dirichlet et son dérivé, le processus du restaurant chinois, ainsi que le processus Bêta et son dérivé, le processus du buffet indien, sont décrits. Le modèle proposé pour l'apprentissage de dictionnaire s'appuie sur un a priori de type Buffet Indien qui permet d'apprendre un dictionnaire de taille adaptative. Nous détaillons la méthode de Monte-Carlo proposée pour l'inférence. Le niveau de bruit et celui de la parcimonie sont aussi échantillonnés, de sorte qu'aucun réglage de paramètres n'est nécessaire en pratique. Des expériences numériques illustrent les performances de l'approche pour les problèmes du débruitage, de l'inpainting et de l'acquisition compressée. Les résultats sont comparés avec l'état de l'art.Le code source en Matlab et en C est mis à disposition. / Dictionary learning for sparse representation has been widely advocated for solving inverse problems. Optimization methods and parametric approaches towards dictionary learning have been particularly explored. These methods meet some limitations, particularly related to the choice of parameters. In general, the dictionary size is fixed in advance, and sparsity or noise level may also be needed. In this thesis, we show how to perform jointly dictionary and parameter learning, with an emphasis on image processing. We propose and study the Indian Buffet Process for Dictionary Learning (IBP-DL) method, using a bayesian nonparametric approach.A primer on bayesian nonparametrics is first presented. Dirichlet and Beta processes and their respective derivatives, the Chinese restaurant and Indian Buffet processes are described. The proposed model for dictionary learning relies on an Indian Buffet prior, which permits to learn an adaptive size dictionary. The Monte-Carlo method for inference is detailed. Noise and sparsity levels are also inferred, so that in practice no parameter tuning is required. Numerical experiments illustrate the performances of the approach in different settings: image denoising, inpainting and compressed sensing. Results are compared with state-of-the art methods is made. Matlab and C sources are available for sake of reproducibility.

Orientador: Bernadete A. Caprioglio de Castro Oliveira / Banca: Romualdo Dias / Banca: Carlos Henrique da Costa Silva / Resumo: Este trabalho analisa o cotidiano da cidade de São Paulo a partir dos espaços destinados a realização de festas - buffets. Delimitamos o bairro de Moema localizado na Região Sul da metrópole paulista para estudar o papel desses serviços na sua relação com a festa. O consumo realizado nesses lugares e o uso de forma temporária também aparecem imersos ao longo da análise. A produção da festa é estudada a partir do desenvolvimento da vida de bairro e da metrópole, que comporta mudanças nos hábitos de consumo para o qual a festa agora possui lugar. / Abstract: The aim of this study is to investigate the daily life of the city of São Paulo by analyzing places where parties are held - the buffets. We have chosen Moema neighborhood, located in the South Region of São Paulo to study the role of such places in relation to the parties. The consumption taking place in these locations and their occasional use are also objects of this investigation. The production of parties is studied, taking into consideration the neighborhood life and metropolis development, which can shed light into the understanding of consumption habits such as the existence of parties. / Mestre

High performance twin-tail aircraft, like the F-15 and F/A-18, encounter a condition known as tail buffet. At high angles of attack, vortices are generated at the wing fuselage interface (shoulder) or other leading edge extensions. These vortices are directed toward the twin vertical tails. When the flow interacts with the vertical tail it creates pressure variations that can oscillate the vertical tail assembly. This results in fatigue cracks in the vertical tail assembly that can decrease the fatigue life and increase maintenance costs. For many years, research has been conducted to understand this phenomenon of buffet and to reduce its adverse effects on the fatigue life of aerospace structures. Many proposed solutions to this tail buffet problem have had limited success. These include strengthening the tail, modifying the vortex flow, using an active rudder control, and leading edge extensions. Some of the proposed active controls include piezoelectric actuators. Recently, an offset piezoceramic stack actuator was used on an F-15 wind tunnel model to control buffet induced vibrations at high angles of attack. The controller was based on acceleration feedback control methods. In this thesis a procedure for designing the offset piezoceramic stack actuators is developed. This design procedure includes determining the quantity and type of piezoceramic stacks used in these actuators. The changes of stresses, in the vertical tail caused by these actuators during an active control, are investigated. In many cases, linear controllers are very effective in reducing vibrations. However, during flight, the natural frequencies of the vertical tail structural system changes as the airspeed increases. This in turn, reduces the effectiveness of a linear controller. Other causes such as the unmodeled dynamics and nonlinear effects due to debonds also reduce the effectiveness of linear controllers. In this thesis, an adaptive neural network is used to augment the linear controller to correct these effects.

Made available in DSpace on 2014-06-11T19:27:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-10-20Bitstream added on 2014-06-13T18:56:36Z : No. of bitstreams: 1 santos_rgc_me_rcla.pdf: 2536544 bytes, checksum: dc762b4cbe4bc08c5b6d0aab4063dc1d (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho analisa o cotidiano da cidade de São Paulo a partir dos espaços destinados a realização de festas – buffets. Delimitamos o bairro de Moema localizado na Região Sul da metrópole paulista para estudar o papel desses serviços na sua relação com a festa. O consumo realizado nesses lugares e o uso de forma temporária também aparecem imersos ao longo da análise. A produção da festa é estudada a partir do desenvolvimento da vida de bairro e da metrópole, que comporta mudanças nos hábitos de consumo para o qual a festa agora possui lugar. / The aim of this study is to investigate the daily life of the city of São Paulo by analyzing places where parties are held – the buffets. We have chosen Moema neighborhood, located in the South Region of São Paulo to study the role of such places in relation to the parties. The consumption taking place in these locations and their occasional use are also objects of this investigation. The production of parties is studied, taking into consideration the neighborhood life and metropolis development, which can shed light into the understanding of consumption habits such as the existence of parties.

Med hög sannolikhet tittar du just nu på en yta av glas. Bakom skärmen ligger ett rutnät beståendes av tusentals pixlar som formar det du ser. Den digitala revolutionen har underlättat våra liv på det mest fantastiska sätt. Men i sociala rum kring ett matbord har det blivit en kamp om uppmärksamheten mellan två olika världar, en virtuell och en verklig. Mitt arbete handlar om den visuella konsumtionen på Instagram. Hur vi ständigt vill se mer, hur vi vänjer oss vid belöning och bekräftelse. Vi smygtittar in i folks liv och är nästan alltid uppkopplade. Ett nytt beteende har snabbt utvecklats där vi väljer att kolla på telefonen i stället för att samtala och se varandra IRL. Likt en Wunderkammer har jag samlat objekt från världens alla hörn i ett rum. Av nyfikenhet att försöka förstå den digitala frestelsen. Att samla fragment på en och samma plats för att skapa en helhet. Symboler, sida vid sida. Hierarkier. Ett kontrollerat kaos. Delar av glas. Bit efter bit, pixel efter pixel. I min gestaltning har jag materialiserat det digitala genom tusentals bitar av glas – och fogar som skapar friktion för ett febrilt scrollande finger. / It’s a big chance that you’re currently looking at a surface of glass. Behind the screen is a grid consisting thousands of pixels that shape what you see. The digital revolution has made our lives easier in the most amazing way. But in social settings around a dining table, there has been a struggle for attention between two different worlds, a virtual and a real. My project is about the visual consumption on Instagram. How we constantly want to see more, how we get used to rewards and confirmation. We peek into people's lives and are almost always connected. A new behavior has developed rapidly where we choose to look at the phone instead of talking and seeing each other IRL. Just like a Wunderkammer, I have collected objects from all over the world in one room, out of curiosity to try to understand the digital hunger. To collect fragments in one place to see the whole picture. Symbols, side by side. Hierarchy. A controlled chaos. Parts of glass. Bit by bit, pixel by pixel. In my artwork, I have materialized the digital world with thousands of pieces of glass — and grouts that create friction for a scrolling finger.

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The master thesis focuses on the analysis of conditions and subventions for entrepre-neurs in the service sector in Třeboň. The main target of this thesis is to draft a business plan for catering facility Bistro u Kapra, by analyzing the market conditions, the internal business envi-ronment and the elaboration of the complete documentation with regard to the target group, the cycle tourists. The aim is to build on the successful history of the family business, to draft a new conception in reaction on the actual situation by using the per-sonal know-how of the environment as well as to use the findings from the bachelor thesis of the author, so that the business plan can be realized in the future.

Submitted by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-11-28T13:19:32Z No. of bitstreams: 1 Dissertação - Diego S. Ueda.pdf: 1175709 bytes, checksum: cec0f8881ab92691b34eb7c6374c65f8 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-11-28T13:19:51Z (GMT) No. of bitstreams: 1 Dissertação - Diego S. Ueda.pdf: 1175709 bytes, checksum: cec0f8881ab92691b34eb7c6374c65f8 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2016-11-28T13:20:06Z (GMT) No. of bitstreams: 1 Dissertação - Diego S. Ueda.pdf: 1175709 bytes, checksum: cec0f8881ab92691b34eb7c6374c65f8 (MD5) / Made available in DSpace on 2016-11-28T13:20:06Z (GMT). No. of bitstreams: 1 Dissertação - Diego S. Ueda.pdf: 1175709 bytes, checksum: cec0f8881ab92691b34eb7c6374c65f8 (MD5) Previous issue date: 2016-06-30 / Currently, non-alcoholic drinks consumption is shrinking, what was 88.9 liters per person in 2010 increased to 80.6 liters in 2014 (ABIR, 2015). This challenging environment in which they are the beverage industry requires increasing attention of managers and investors in decision-making. Thus, it is through the economic and financial evaluation of investments that can project the success or failure economic, based on the variables that make up the financial statements. However, some investors can get good results even in the face of a negative scenario, is the case of Warren Buffett. Before the above, this study aims to economic and financial analyzing Ambev companies, Coca-Cola and Pepsi based on Warren's investment methodology Buffett proposed the work of Andrade and Koshio (2014) to see if such companies have a competitive advantage long term on the scenario outlined. Therefore, it has the following objectives: i. Identify and compare the criteria of Warren Buffett for each account group, according to the methodology used by Andrade and Koshio (2014); ii. Sort criteria Warren Buffett as the Zurra methodology (2008); iii. Assess whether there is a relationship between the valuation of the price of the Shares to the rating methodology of Warren Buffett criteria via weighting Zurra weight system (2008). The research was classified as the goals as exploratory, descriptive explanatory, using procedures as bibliographic and documentary survey with qualitative and quantitative approach. The results showed that the methodology of Andrade and Koshio (2014) was not sufficient to determine the level of satisfaction of the criteria of Warren Buffett, only determined the level of service to investor criteria. However, when using the Zurra methodology (2008) was able to sort the satisfaction of the criteria of Warren Buffett whose results showed satisfactory level for Coca-Cola, or durable competitive advantage. However, by correlating the historical price of the shares with the classification methodology of Warren Buffett criteria via weighting Zurra weight system (2008) found that Ambev pointed valuation superior to the other companies disproving the results in the classification the satisfaction of Warren Buffett's criteria. / Atualmente, o consumo de bebidas não alcoólicas está encolhendo, o que antes era de 88,9 litros por pessoa em 2010 passou para 80,6 litros em 2014 (ABIR, 2015). Esse ambiente desafiador em que se encontram as indústrias de bebidas requer cada vez mais atenção dos administradores e investidores na tomada de decisão. Assim, é por meio da avaliação econômico-financeira dos investimentos que se pode projetar o sucesso ou insucesso econômico deste, tendo como base as variáveis que compõe os demonstrativos contábeis. Porém, alguns investidores conseguem obter bons resultados mesmo diante de um cenário negativo, é o caso de Warren Buffett. Ante do exposto, o presente trabalho tem como objetivo analisar econômico-financeira as empresas Ambev, Coca-Cola e Pepsi com base na metodologia de investimento de Warren Buffett proposta pelo trabalho de Andrade e Koshio (2014) para saber se tais empresas possuem vantagem competitiva de longo prazo diante do cenário delineado. Para tanto, tem como objetivos específicos: i. Identificar e Comparar os critérios de Warren Buffett para cada grupo de conta, conforme metodologia utilizada por Andrade e Koshio (2014); ii. Classificar os critérios de Warren Buffett conforme a metodologia de Zurra (2008); iii. Avaliar se existe uma relação entre a valorização do Preço das Ações com a metodologia de classificação dos critérios de Warren Buffett via ponderação do sistema de peso de Zurra (2008). A pesquisa foi classificada quanto aos objetivos como exploratória, descritiva explicativa, utilizando como procedimentos o levantamento bibliográfico e documental com abordagem quali-quanti. Os resultados apontaram que a metodologia de Andrade e Koshio (2014) não foi suficiente para determinar o nível de satisfação dos critérios de Warren Buffett, apenas determinaram o nível de atendimento aos critérios do investidor. Porém, ao utilizar a metodologia de Zurra (2008) foi possível classificar a satisfação dos critérios de Warren Buffett cujo resultado apontou nível satisfatório para Coca-Cola, ou seja, vantagem competitiva durável. Contudo, ao correlacionar o preço histórico das ações com o com a metodologia de classificação dos critérios de Warren Buffett via ponderação do sistema de peso de Zurra (2008) verificou-se que a Ambev apontou valorização superior às demais empresas refutando os resultados encontrados na classificação da satisfação dos critérios de Warren Buffett.

Multidisciplinary design optimization (MDO) requires many designs to be evaluated while searching for an optimum. As a result, the calculations done to evaluate the designs must be quick and simple to have a reasonable turn-around time. This makes aerodynamic calculations in the transonic regime difficult. Running computational fluid dynamics (CFD) calculations within the MDO code would be too computationally expensive. Instead, CFD is used outside the MDO to find two-dimensional aerodynamic properties of a chosen airfoil shape, BACJ, at a number of points over a range of thickness-to-chord ratios, free-stream Mach numbers, and lift coefficients. These points are used to generate surrogate models which can be used for the two-dimensional aerodynamic calculations required by the MDO computational design environment. Strip theory is used to relate these two-dimensional results to the three-dimensional wing. Models are developed for the center of pressure location, the lift curve slope, the wave drag, and the maximum allowable lift coefficient before buffet. These models have good agreement with the original CFD results for the airfoil. The models are integrated into the aerodynamic and aeroelastic sections of the MDO code. / Master of Science