1000 resultados para Modelo de escolha discreta


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The Internet is present in each step of a trip planning. The constant technological advances has made major changes in the tourism industry. This is noticeable by the growing number of people who share their travel experiences on the Internet. This study has aimed to analyze the factors that influence the use of the Online Travel Reviews (OTR) in choosing an accommodation. It was done an investigation into the comments available on the internet about information on touristic products and services, specifically about accommodations. The research proposed to understand the influencing factors of OTR, in the Brazilian context, through the Technology Acceptance Model, Motivational Theory, Similarity, and Trustworthiness. The methodology used was a descriptive-exploratory study, with a quantitative approach, and bibliographic research. The study used a Structural Equation Modeling technique called Partial Least Squares (PLS), to test and evaluate the proposed research model. Data collection was performed with 308 guests hosted in five hotels in Ponta Negra (Natal/RN), who have used the OTRs in choosing an accommodation. The research tested fifteen hypotheses, where nine were confirmed, and six were rejected. The results showed that guests have attitude and intention to use the OTRs to choose an accommodation.

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One of several techniques applied to production processes oil is the artificial lift, using equipment in order to reduce the bottom hole pressure, providing a pressure differential, resulting in a flow increase. The choice of the artificial lift method depends on a detailed analysis of the some factors, such as initial costs of installation, maintenance, and the existing conditions in the producing field. The Electrical Submersible Pumping method (ESP) appears to be quite efficient when the objective is to produce high liquid flow rates in both onshore and offshore environments, in adverse conditions of temperature and in the presence of viscous fluids. By definition, ESP is a method of artificial lift in which a subsurface electric motor transforms electrical into mechanical energy to trigger a centrifugal pump of multiple stages, composed of a rotating impeller (rotor) and a stationary diffuser (stator). The pump converts the mechanical energy of the engine into kinetic energy in the form of velocity, which pushes the fluid to the surface. The objective of this work is to implement the optimization method of the flexible polyhedron, known as Modified Simplex Method (MSM) applied to the study of the influence of the modification of the input and output parameters of the centrifugal pump impeller in the channel of a system ESP. In the use of the optimization method by changing the angular parameters of the pump, the resultant data applied to the simulations allowed to obtain optimized values of the Head (lift height), lossless efficiency and the power with differentiated results.

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Num mundo cada vez mais globalizado como o de hoje, a internacionalização das Instituições de Ensino Superior tem assumido uma importância estratégica e crescente, não só pela necessidade de preparar adequadamente os seus estudantes para esta nova realidade, como igualmente pelo aumento da competição entre as mesmas. A presença de estudantes internacionais é, assim, uma mais-valia a todos os níveis para as Instituições, pelo que é fundamental não só procurar atrair os melhores, como igualmente garantir que fiquem satisfeitos com as opções tomadas e leais à Instituição escolhida. Foi com o objetivo de conhecer os fatores da satisfação e da lealdade dos estudantes internacionais que esta investigação foi desenvolvida. Assim, com base na informação recolhida através de um questionário numa amostra de 190 estudantes internacionais a estudar no Politécnico de Leiria, efetuou-se o estudo quantitativo, transversal e de natureza conclusiva descritiva, com a finalidade de investigar o impacto dos fatores de escolha e das fontes de informação na lealdade dos estudantes internacionais, mediado pela satisfação com a escolha efetuada. Os resultados da estimação de um modelo estrutural através do “partial least squares” (PLS) evidenciaram que os fatores com maior impacto na satisfação pela escolha efetuada foram: a perceção que têm de Portugal, o ambiente e localização do Politécnico de Leiria e as fontes de informação (em particular as fontes online). As motivações pessoais e a perceção da Instituição não revelaram capacidade para explicar a satisfação dos estudantes, muito embora os mesmos os reconheçam como fatores importantes na decisão de estudar no estrangeiro e no Politécnico de Leiria. Concluiu-se ainda que a imagem corporativa do Politécnico de Leiria influencia a recomendação de terceiros; as caraterísticas de Portugal influenciam a perceção que os estudantes têm do ambiente e localização da Instituição; por sua vez, Portugal e a região onde se situa o Politécnico de Leiria influenciam a sua imagem corporativa; a satisfação e a imagem corporativa do Politécnico de Leiria explicam a lealdade dos estudantes internacionais, medida em termos da intenção de a recomendar a familiares, amigos e conhecidos e de partilhar informações sobre a mesma nas redes sociais. Para completar o presente estudo, foi ainda efetuada uma análise comparativa dos estudantes em função da sua proveniência, tendo-se observado diferenças significativas entre eles. De notar que os estudantes latino-americanos declaram-se mais satisfeitos e com maior propensão para recomendar o Politécnico de Leiria aos seus conhecidos. Com base nos resultados obtidos é apresentado um conjunto de recomendações ao Politécnico de Leiria, úteis para implementar estratégias de marketing e de comunicação mais adequadas à captação e fidelização dos estudantes internacionais e, assim, contribuir para a sua internacionalização.

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Este artigo analisa a organização da rede de saúde da Paraíba a partir do modelo de regionalização proposto pelo estado da Paraíba. Material e Métodos: Trata-se de um estudo documental que tomou por base, prioritariamente, o Plano Diretor de Regionalização da Paraíba e os documentos oficiais do Ministério da Saúde que orientam a construção dos mesmos pelos Estados. Resultados: A análise dos dados revelou alguns limites no processo de implantação do PDR/ PB, tais como a ausência de análise das características sociais, econômicas e culturais durante a escolha das sedes das regiões de saúde e a inexistente descrição da organização da assistência à saúde do território estadual. Conclusão: O processo de regionalização e a formulação do PDR da Paraíba não seguiram a Instrução Normativa do Ministério da Saúde em alguns aspectos, desconsiderando as especificidades de cada região de saúde, o que pode resultar em problemas no acesso e na articulação da rede de serviços com vistas à legitimação das regiões de saúde desse Estado

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Este artigo analisa a organização da rede de saúde da Paraíba a partir do modelo de regionalização proposto pelo estado da Paraíba. Material e Métodos: Trata-se de um estudo documental que tomou por base, prioritariamente, o Plano Diretor de Regionalização da Paraíba e os documentos oficiais do Ministério da Saúde que orientam a construção dos mesmos pelos Estados. Resultados: A análise dos dados revelou alguns limites no processo de implantação do PDR/ PB, tais como a ausência de análise das características sociais, econômicas e culturais durante a escolha das sedes das regiões de saúde e a inexistente descrição da organização da assistência à saúde do território estadual. Conclusão: O processo de regionalização e a formulação do PDR da Paraíba não seguiram a Instrução Normativa do Ministério da Saúde em alguns aspectos, desconsiderando as especificidades de cada região de saúde, o que pode resultar em problemas no acesso e na articulação da rede de serviços com vistas à legitimação das regiões de saúde desse Estado

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Tese (doutorado)—Universidade de Brasília, Instituto de Geociências, Pós-Graduação em Geociências Aplicadas, 2015.

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Tese de Doutoramento, Psicologia, Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, 2015

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The physical model was based on the method of Newton-Euler. The model was developed by using the scientific computer program Mathematica®. Several simulations where tried varying the progress speeds (0.69; 1.12; 1.48; 1.82 and 2.12 m s-1); soil profiles (sinoidal, ascending and descending ramp) and height of the profile (0.025 and 0.05 m) to obtain the normal force of soil reaction. After the initial simulations, the mechanism was optimized using the scientific computer program Matlab® having as criterion (function-objective) the minimization of the normal force of reaction of the profile (FN). The project variables were the lengths of the bars (L1y, L2, l3 and L4), height of the operation (L7), the initial length of the spring (Lmo) and the elastic constant of the spring (k t). The lack of robustness of the mechanism in relation to the variable height of the operation was outlined by using a spring with low rigidity and large length. The results demonstrated that the mechanism optimized showed better flotation performance in relation to the initial mechanism.

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The purpose of this work was to analyze the logistical distribution of Brazilian soybean by applying a quadratic programming to a spatial equilibrium model. The soybean transportation system is an important part of the soybean complex in Brazil, since the major part of the costs of this commodity derives from the transportation costs. Therefore, the optimization of this part of the process is essential to a better competitiveness of the Brazilian soybean in the international market. The Brazilian soybean complex have been increasing its agricultural share in the total of the exportation value in the last ten years, but due to other countries' investments the Brazilian exportations cannot be only focused on increasing its production but it still have to be more efficient. This way, a model was reached which can project new frames by switching the transportation costs and conduce the policy makers to new investments in the sector.

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The field activities are essential for the education of a good taxonomist. The most common problems found in field activities are: a) large number of students, b) heterogeneous educational background and unlevelled knowledge of the participants, c) repetitions and tendency of collecting the more evidents life-forms. The causes and consequences of such problems are discussed herein. The proposed solution is a methodology, based on many years of experience in field courses for undergraduate and graduate courses. Topics about the ideal number of participants, area of coverage, period of activity, division of work and the necessary material and equipment are discussed. According to the number of species collected at the same place, this methodology may result in a list of local species with precise information about the life-forms, habitat, common names, frequency, uses, phenology and further information in this kind of work. The results of the aplication of this metodology in a field course held in the region of Ubatuba-SP are presented.

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The aim of this study was to analyze the conceptions that hearing mothers of deaf children have about deafness and relate it to the language mode used by the mother and the child. We interviewed 10 mothers of deaf children, five of whom were prescholars and five of school age. The content was analyzed as to thematic and category types, with emphasis on the categories conception of deafness and choice of language mode . Data analysis showed that one mother seems to see deafness as a disease, another as a difference and the other mothers were found to be somewhere between these two views. In relation to the preferred language mode, half the mothers reported that their children predominantly use signs, the other half uses speech and signs, with the exception of one child who uses only speech. The child whose mother acts as if deafness is a disease uses speech while another one whose mother acts as if deafness is a difference uses speech as well as signs.

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A common breeding strategy is to carry out basic studies to investigate the hypothesis of a single gene controlling the trait (major gene) with or without polygenes of minor effect. In this study we used Bayesian inference to fit genetic additive-dominance models of inheritance to plant breeding experiments with multiple generations. Normal densities with different means, according to the major gene genotype, were considered in a linear model in which the design matrix of the genetic effects had unknown coefficients (which were estimated in individual basis). An actual data set from an inheritance study of partenocarpy in zucchini (Cucurbita pepo L.) was used for illustration. Model fitting included posterior probabilities for all individual genotypes. Analysis agrees with results in the literature but this approach was far more efficient than previous alternatives assuming that design matrix was known for the generations. Partenocarpy in zucchini is controlled by a major gene with important additive effect and partial dominance.

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Purpose: This study aimed to evaluate the assistance quality through the perception of the users and municipal health managers (mayors, health secretaries and screening team). Methods: A transversal and descriptive study was carried out. Results: The sample was comprised by 359 users and 48 managers. Medical assistance was considered excellent by 79.6% of the users, 93.7% of the managers, 87.5% of the health secretaries and 100% of the screening team. Reception received a great evaluation by 73.8% of the users and 93.8% of the selectors. Conclusion: The assistance model used at the Ophthalmologic Clinic of Divinolândia obtained a high level of satisfaction pleasing both users and managers.

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Universidade Estadual de Campinas . Faculdade de Educação Física

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Universidade Estadual de Campinas . Faculdade de Educação Física