Bessel Integrals and Fundamental Solutions for a Generalized Tricomi Operator

Partial Fourier transforms are used to find explicit formulas for two remarkable fundamental solutions for a generalized Tricomi operator. These fundamental solutions reflect clearly the mixed type of the operator. In order to prove these results, we establish explicit formulas for Fourier transforms of some type of Bessel functions

The implementation of autonomous vehicles by TNCs in Portugal

The increasing popularity of shared-mobility services completely reshaped the automotive industry particularly with the introduction of Transportation Network Companies like Uber. This research will mainly focus on the implementation of autonomous vehicles, namely vehicles with automated driving features that do not require human intervention by TNCs in Portugal. The main purpose is to investigate the motivations and barriers that influence people’s decision to prefer an autonomous vehicle over the conventional one when using a TNC as well as understand which demographic market segment is most attracted by this implementation. With this aim, 10 in-depth interviews were carried out as well as an online survey which collected 127 valid answers. Findings showed that, in general, people that use TNCs in Portugal tend to have a positive opinion regarding these companies as well as autonomous vehicles. However, there is still a certain hesitation towards the openness to choose an autonomous vehicle in this industry, mainly explained by privacy issues and its capacity to react to potential external threats. Moreover, people with more than 30 years old were far more receptive to choose an autonomous vehicle in this industry than the younger ones and women showed more resistance towards about the autonomous vehicles than men. Additionally, the majority of respondents believed that the probability of having an accident with these vehicles will decrease and they will be less damaging to the environment.A crescente popularidade dos serviços de mobilidade partilhada reconfiguraram a indústria automóvel particularmente com a introdução das plataformas digitais de transporte individual de passageiros em veículo descaracterizado (TVDE) como a Uber. Esta dissertação foca-se na implementação de veículos autónomos, nomeadamente veículos com funcionalidades automáticas que não requerem intervenção humana, nas plataformas digitais de TVDE em Portugal. O propósito deste estudo é então investigar as principais motivações e barreiras que influenciam a decisão das pessoas em preferir um carro autónomo quando utilizam estas plataformas digitais, assim como compreender qual o segmento demográfico que é mais atraído por esta implementação. Desta forma, foram realizadas 10 entrevistas e um questionário com 127 respostas válidas. Os resultados revelam que, em geral, as pessoas que usam estas plataformas em Portugal tendem a ter uma opinião positiva em relação a estas empresas bem como veículos autónomos. No entanto, existe uma certa hesitação devido a questões de privacidade ou à capacidade destes veículos em reagir a ameaças externas. Ademais, as pessoas com mais de 30 anos revelaram estar mais recetivas à implementação de carros autónomos nesta indústria do que as mais novas e as mulheres mais hesitantes do que os homens. Adicionalmente, a maioria dos participantes acreditam que a probabilidade de ter um acidente com estes veículos é menor assim como acreditam ser menos poluentes

Graceful exit from inflation using quantum cosmology

A massless scalar field without self interaction and string coupled to gravity is quantized in the framework of quantum cosmology using the Bohm-de Broglie interpretation. Gaussian superpositions of the quantum solutions of the corresponding Wheeler-DeWitt equation in minisuperspace are constructed. The bohmian trajectories obtained exhibit a graceful exit from the inflationary Pre-Big Bang epoch to the decelerated expansion phase.Comment: 8 pages, RevTeX, 4 Postscript figures, uses graficx.sty. Added more text and reference

Aspectos processuais da recuperação judicial

Divulgação dos SUMÁRIOS das obras recentemente incorporadas ao acervo da Biblioteca Ministro Oscar Saraiva do STJ. Em respeito à lei de Direitos Autorais, não disponibilizamos a obra na íntegra.Localização na estante: 347.736(81) B277

A controvérsia dos agentes ergogênicos: estamos subestimando os efeitos naturais da atividade física?

Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Departamento de FisiologiaUniversidade Federal de São Paulo (UNIFESP), Universidade Federal de São Paulo (UNIFESP) Escola Paulista de Medicina Centro de Medicina da Atividade Física e do EsporteUNIFESP, EPM, Depto. de FisiologiaUNIFESP, UNIFESP, EPM, Centro de Medicina da Atividade Física e do EsporteSciEL

The Causal Interpretation of Quantum Mechanics and The Singularity Problem in Quantum Cosmology

We apply the causal interpretation of quantum mechanics to homogeneous quantum cosmology and show that the quantum theory is independent of any time-gauge choice and there is no issue of time. We exemplify this result by studying a particular minisuperspace model where the quantum potential driven by a prescribed quantum state prevents the formation of the classical singularity, independently on the choice of the lapse function. This means that the fast-slow-time gauge conjecture is irrelevant within the framework of the causal interpretation of quantum cosmology.Comment: 18 pages, LaTe

The impact of review valence, rating and type on review helpfulness : a text clustering and text categorization study

Dissertation presented as partial requirement for obtaining the Master`s degree in Information Management, with specialization in Marketing IntelligenceConsumers trust on online reviews to help them making their purchasing decisions. Online reviews provide consumers with clues about the quality of the products that they want to buy. Consumers rely on clues, such as, review helpfulness votes and rating to infer product quality. In this study, we perform a Text Clustering and a Text Categorization analysis to uncover the review characteristics and to predict the review rating, helpfulness votes and the product price, based on review corpus. We use a dataset with 72 878 reviews of unlocked mobile phones sold on Amazon.com to perform this analysis. The main goal of this research is to understand the impact of review valence, rating and type on helpfulness votes on Amazon, for unlocked mobile phones. This research aims, also to understand the impact of price on customer satisfaction and the relationship between customer satisfaction and ratings. Our results suggest that positive reviews that emphasize the feature level quality of the products receive more helpful votes than the positive reviews that contain mainly subjective expressions or negative reviews. Another important finding of this research is on the influence of the price of the product. The phones with high price tend to receive more positive reviews and more helpful votes. These findings have important managerial and theoretical implications. To best of our knowledge, our study is the first one to analyze the effect of the combination of valence, rating and subjectivity of the review text on helpful votes