Viadutos mistos aço betão

Mestrado em Engenharia CivilA presente Dissertação visa analisar as diferentes características relacionadas com os viadutos mistos aço - betão, tanto teoricamente, como a sua aplicação prática através de um caso de estudo. A análise teórica visa desenvolver os conhecimentos das diferentes análises a realizar neste tipo de estrutura e as suas vantagens de aplicação em relação a outras opções existentes. São estudados as características dos materiais empregues, tendo em conta os recentes desenvolvimentos, tanto no que concerne aos materiais, como nas normas que os regem. È efectuada uma apresentação das diversas secções transversais que podem ser executadas com base nestes materiais, juntamente com exemplos da sua aplicação. Nesta perspectiva desenvolvem-se os diferentes métodos construtivos adaptáveis ao tipo de estrutura e à envolvente de implantação. São apresentadas as metodologias de cálculo das secções mistas e dos seus esforços resistentes, de modo a verificar as exigências necessárias em projecto. Tendo por base esta análise teórica aplicam-se os conhecimentos adquiridos a um caso de estudo que visa uma nova abordagem a um projecto real. Esta nova abordagem tem como principio uma modificação geométrica da estrutura, realizando todo o dimensionamento e consequente verificação. ABSTRACT: This dissertation aims the analysis the different characteristics associated with the composite steel and concrete viaducts, in a theoretical way, and also in its practical application, through a study case. The analysis aims the development of a theoretical knowledge of the different studies, to apply on this type of structure, and its advantages considering the other options. The characteristics of the materials used are studied, and new developments are considered, taking into account the type of materials and the rules that regulate them. A presentation of the various cross-sections is made, that can be implemented based on these materials, along with examples of its application. Within this perspective, there are different methods of construction suitable to the type of structure and deployment. Various methodologies are presented to calculate the joint sections and their resistant capacity, to verify the requirements of the project. Based on the theoretical analysis, the acquired knowledge is applied in a study case, taking the form of a new approach to a real project. This new approach has the purpose to change the geometric structure, making a new design and the subsequent verification

Desempenho diagnóstico de lesões músculo-esquelético por biopsia percutânea por agulha no Hospital Santo António.

Mestrado Integrado em MedicinaMaster Degree in Medicin

Megalobulimus dryades, a new species from the Atlantic Forest in southeastern Brazil, and redescription of Megalobulimus gummatus (Gastropoda: Strophocheilidae)

Megalobulimus dryades sp. nov. is described from the Atlantic Forest in the Vale do Ribeira region, in the states of Paraná and São Paulo, S-SE Brazil, based on morphology. Representatives of the new species with white peristome and glossy periostracum have been misidentified as Megalobulimus gummatus (Hidalgo, 1870) since the 19th Century. The true M. gummatus is revised and redescribed, and its distribution is here restricted to Rio de Janeiro state. Externally, the new species differs from M. gummatus in having distinct protoconch color and sculpture, teleoconch sculpture marked by strong anastomosing rugosities and malleations, and lighter colored white-greyish head-foot. Internally, it presents distinct jaw and radular features, a talon, and a long convoluted penis bearing two flagella. Additional comparisons with other Brazilian congeneric species are also provided

Longitudinal study in male swimmers: a hierarchical modeling of energetics and biomechanical contributions for performance.

The aim of this study was to assess the pooled and individual response of male swimmers over two consecutive years of training and identify the energetic and biomechanical factors that most contributed for the final performance. Nine competitive swimmers (20.0 ± 3.54 years old; 10.1 ± 3.41 years of training experience; 1.79 ± 0.07 m of height; 71.34 ± 8.78 kg of body mass; 22.35 ± 2.02 kg·m(-2) of body mass index; 1.86 ± 0.07 m of arm span; 116.22 ± 4.99 s of personal record in the 200 m long course freestyle event) performed an incremental test in six occasions to obtain the velocity at 4 mmol of blood lactate (V4) and the peak blood lactate concentrations (Lapeak) as energetics, and the stroke frequency (SF), stroke length (SL), stroke index and swim efficiency as biomechanical variables. Performance was determined based on official time's lists of 200 m freestyle event. Slight non-significant improvements in performance were determined throughout the two season period. All energetic and biomechanical factors also presented slight non-significant variations with training. Swimmers demonstrat-ed high inter-individual differences in the annual adaptations. The best performance predictors were the V4, SF and SL. Each unit of change V4, SF and SL represented an enhancement of 0.11 s, 1.21 s and 0.36 s in performance, respectively. The results show that: (i) competitive male swimmers need at least two consecutive seasons to have slight improvements in performance, energetics and biomechanical profiles; (ii) major improvements in competition performance can be accomplished by improving the V4, SF and SL based on the individual background. Key PointsElite swimmers are able to demonstrate slight changes in performance, energetic and biomechanical characteristics at least during two seasons of training;Additional improvements in competition performance can be accomplished by manipulating the V4, SF and SL based on the individual background.Each unit of change V4, SF and SL represent an enhancement of 0.11 s, 1.21 s and 0.36 s in performance, respectively

Acessibilidade web: uma avaliação do Sistema de Bibliotecas da Universidade Federal do Tocantins

The study presents the theme of web accessibility on the perspective of the portal of the Library of the Federal University of Tocantins (Sisbib/UFT) and reflects on the relevance of access and use of scientific information presented in this environment. It aims to evaluate this portal, on the precepts of web accessibility, in line with the guidelines defined by Emag. As a methodology, the research was organized by the descriptive method. Among the results of validation through the Ases software, the percentage of 87.17%, was found, which represents a warning sign for the institution. In what confers the evaluation via the Emag form, 15 web accessibility barriers were identified. Considering the results, it is possible to affirm that the Sisbib/UFT portal is not accessible in view of the web accessibility standards defined by Emag, It is necessary to correct flaws, thus allowing plural and flexible access to the community.O estudo apresenta a temática da acessibilidade web sobre a perspectiva do portal da Biblioteca da Universidade Federal do Tocantins (Sisbib/UFT) e reflete acerca da relevância do acesso e uso das informações científicas apresentadas nesse ambiente. Tem por objetivo avaliar o referido portal, sobre os preceitos da acessibilidade web, frente as diretrizes definidas pelo Emag. Como metodologia, a pesquisa foi organizada pelo método descritivo. Entre os resultados da validação por meio do software Ases, constatou-se a porcentagem de 87.17%, o que representa um sinal de alerta a instituição. No que confere a avaliação via formulário Emag, foram identificadas 15 barreiras de acessibilidade web. Considerando os resultados, é possível afirmar que o portal Sisbib/UFT, não está acessível frente aos padrões de acessibilidade web, sendo necessário corrigir as falhas encontradas e permitir assim o acesso plural e flexível à comunidade

Acessibilidade web: uma avaliação do Sistema de Bibliotecas da Universidade Federal do Tocantins

O estudo apresenta a temática da acessibilidade web sobre a perspectiva do portal da Biblioteca da Universidade Federal do Tocantins (Sisbib/UFT) e reflete acerca da relevância do acesso e uso das informações científicas apresentadas nesse ambiente. Tem por objetivo avaliar o referido portal, sobre os preceitos da acessibilidade web, frente as diretrizes definidas pelo Emag. Como metodologia, a pesquisa foi organizada pelo método descritivo. Entre os resultados da validação por meio do software Ases, constatou-se a porcentagem de 87.17%, o que representa um sinal de alerta a instituição. No que confere a avaliação via formulário Emag, foram identificadas 15 barreiras de acessibilidade web. Considerando os resultados, é possível afirmar que o portal Sisbib/UFT, não está acessível frente aos padrões de acessibilidade web, sendo necessário corrigir as falhas encontradas e permitir assim o acesso plural e flexível à comunidade

Untangling causes of variation in mercury concentration between flight feathers

Bird feathers are one of the most widely used animal tissue in mercury biomonitoring, owing to the ease of collection and storage. They are also the principal excretory pathway of mercury in birds. However, limitations in our understanding of the physiology of mercury deposition in feathers has placed doubt on the interpretation of feather mercury concentratoins. Throughout the literature, moult sequence and the depletion of the body mercury pool have been taken to explain patterns such as the decrease in feather mercury from the innermost (P1) to the outermost primary feather (P10) of the wing. However, it has been suggested that this pattern is rather a measurement artefact as a result of the increased feather mass to length ratio along the primaries, resulting in a dilution effect in heavier feathers. Here, we attempt to untangle the causes of variation in feather mercury concentrations by quantifying the mercury concentration as μg of mercury (i) per gram of feather, (ii) per millimetre of feather, and (iii) per day of feather growth in the primary feathers of Bulwer's Petrel Bulweria bulwerii chicks, effectively controlling for some of the axes of variation that may be acting in adults, and monitoring the growth rate of primary feathers in chicks. The mercury concentration in Bulwer's Petrel chicks' primaries increased from the innermost to the outermost primary for all three concentration measures, following the order of feather emergence. These observations confirm that the pattern of mercury concentration across primary feathers is not an artefact of the measure of concentration, but is likely an effect of the order of feather growth, whereby the earlier grown feathers are exposed to higher blood mercury concentrations than are later moulted feathers as a result of blood mercury depletion.Fundação para a Ciência e Tecnologia - FCTinfo:eu-repo/semantics/publishedVersio