Optimização de um sistema híbrido off-grid PV, Gerador Diesel e Baterias

Tese de mestrado integrado, Engenharia da Energia e do Ambiente, Universidade de Lisboa, Faculdade de Ciências, 2016

Intercambio entre lectores. Un proyecto con mujeres y niños en contexto de encierro

El artículo expone algunas experiencias y resultados del proyecto "Lectura y escritura en la Unidad 33. Madres, niños e instituciones educativas" que se inició como proyecto de Extensión de la Universidad Nacional de La Plata en el año 2010. El proyecto implementa con mujeres y niños que viven en situación de encierro un conjunto de acciones con diferentes grados de formalización en torno a las culturas de lo escrito y otras formas de expresión, en tanto prácticas culturales que tienen derecho de ejercer y ampliar en diversas situaciones de interacción social. Se presentan los distintos espacios de trabajo y se sintetizan algunos resultados de un un taller denominado "la ronda: historia, poesías y canciones" Del análisis de las situaciones propuestas y los datos recogidos de un corpus de entrevistas semiestructuradas a un grupo de mujeres participantes, con edades entre 19 y 33 años, se destaca el sentido y valor de las lecturas e intercambios entre lectores literarios en la vida cotidiana del encierro

Bellezze architettoniche per le feste della chinea in Roma nei secoli XVII e XVIII.

Running title: Le architetture per le feste della chinea.

Island Park

postmark dated

Island Park

postmark dated

Intercambio entre lectores. Un proyecto con mujeres y niños en contexto de encierro

El artículo expone algunas experiencias y resultados del proyecto "Lectura y escritura en la Unidad 33. Madres, niños e instituciones educativas" que se inició como proyecto de Extensión de la Universidad Nacional de La Plata en el año 2010. El proyecto implementa con mujeres y niños que viven en situación de encierro un conjunto de acciones con diferentes grados de formalización en torno a las culturas de lo escrito y otras formas de expresión, en tanto prácticas culturales que tienen derecho de ejercer y ampliar en diversas situaciones de interacción social. Se presentan los distintos espacios de trabajo y se sintetizan algunos resultados de un un taller denominado "la ronda: historia, poesías y canciones" Del análisis de las situaciones propuestas y los datos recogidos de un corpus de entrevistas semiestructuradas a un grupo de mujeres participantes, con edades entre 19 y 33 años, se destaca el sentido y valor de las lecturas e intercambios entre lectores literarios en la vida cotidiana del encierro

A reduced load approximation accounting for link interactions in a loss network

This paper is concerned with evaluating the performance of loss networks. Accurate determination of loss network performance can assist in the design and dimensioning of telecommunications networks. However, exact determination can be difficult and generally cannot be done in reasonable time. For these reasons there is much interest in developing fast and accurate approximations. We develop a reduced load approximation which improves on the famous Erlang fixed point approximation (EFPA) in a variety of circumstances. We illustrate our results with reference to a range of networks for which the EFPA may be expected to perform badly.

A numerical and experimental study on energy saving solutions for mobile hydraulic machinery

Energy saving in mobile hydraulic machinery, aimed to fuel consumption reduction, has been one of the principal interests of many researchers and OEMs in the last years. Many different solutions have been proposed and investigated in the literature in order to improve the fuel efficiency, from novel system architectures and strategies to control the system to hybrid solutions. This thesis deals with the energy analysis of a hydraulic system of a middle size excavator through mathematical tools. In order to conduct the analyses the multibody mathematical model of the hydraulic excavator under investigation will be developed and validated on the basis of experimental activities, both on test bench and on the field. The analyses will be carried out considering the typical working cycles of the excavators defined by the JCMAS standard. The simulations results will be analysed and discussed in detail in order to define different solutions for the energy saving in LS hydraulic systems. Among the proposed energy saving solutions, energy recovery systems seem to be very promising for fuel consumption reduction in mobile machinery. In this thesis a novel energy recovery system architecture will be proposed and described in detail. Its dimensioning procedure takes advantage of the dynamic programming algorithm and a prototype will be realized and tested on the excavator under investigation. Finally the energy saving proposed solutions will be compared referring to the standard machinery architecture and a novel hybrid excavator with an energy saving up to 11% will be presented.

HISTÓRIAS DE VIDA E MEMÓRIAS LITERÁRIAS: UMA NARRATIVA SOBRE A PRÁTICA

Este estudo tem por finalidade promover a reflexão sobre a prática pedagógica, analisando-a por meio do registro de um projeto de leitura e escrita, desenvolvido junto a uma turma de 4ª série (atual 5º ano) do Ensino Fundamental, realizado em uma Escola da Rede Pública Estadual de SP, Iracema de Barros Bertolaso, no município de Mauá. Tem também, a intenção de sensibilizar educadores sobre a importância do trabalho compartilhado com os alunos, do respeito às ideias infantis e da convicção do quanto se faz necessário atrelar o ensino e a aprendizagem ao prazer. O projeto em questão deu origem ao livro Histórias hilárias de uma 4ª série (e outros resgates), editado pela SCORTECCI e lançado no ano de 2008. Para reconstruir essa história, foram recuperados os registros de percurso do trabalho docente realizado por mim no ano de 2006 e realizado o levantamento de documentos como fotos, relatos, produções de alunos e matérias publicadas em jornais das quais os mesmos participaram. A pesquisa me levou a uma reaproximação com alguns ex alunos para compor, também por meio de entrevistas, este quadro onde o intento é dimensionar o alcance do trabalho realizado. Retratar a própria prática e coloca-la em situação de pesquisa configurou-se em ferramenta valiosa para a reconstrução do sentido de nossas ações à medida que nos ofereceu dados significativos a reflexão. Vincular esta análise ao estudo da trajetória formativa pessoal, feita por meio da abordagem biográfica, permitiu-nos ampliar nossa compreensão do quanto, e em que medida, trazemos para o exercício docente as influência do vivido. Acreditamos que a análise da trajetória formativa pessoal e da experiência vivida junto a um grupo de alunos, nesta pesquisa, justifica-se à medida que contribui para os estudos que se ocupam desta questão.

Decision-making algorithms in geometric modelling

Many of the applications of geometric modelling are concerned with the computation of well-defined properties of the model. The applications which have received less attention are those which address questions to which there is no unique answer. This thesis describes such an application: the automatic production of a dimensioned engineering drawing. One distinctive feature of this operation is the requirement for sophisticated decision-making algorithms at each stage in the processing of the geometric model. Hence, the thesis is focussed upon the design, development and implementation of such algorithms. Various techniques for geometric modelling are briefly examined and then details are given of the modelling package that was developed for this project, The principles of orthographic projection and dimensioning are treated and some published work on the theory of dimensioning is examined. A new theoretical approach to dimensioning is presented and discussed. The existing body of knowledge on decision-making is sampled and the author then shows how methods which were originally developed for management decisions may be adapted to serve the purposes of this project. The remainder of the thesis is devoted to reports on the development of decision-making algorithms for orthographic view selection, sectioning and crosshatching, the preparation of orthographic views with essential hidden detail, and two approaches to the actual insertion of dimension lines and text. The thesis concludes that the theories of decision-making can be applied to work of this kind. It may be possible to generate computer solutions that are closer to the optimum than some man-made dimensioning schemes. Further work on important details is required before a commercially acceptable package could be produced.

Design of few-mode fibers with arbitrary and flattened differential mode delay

This letter proposes the use of a refractive index profile with a graded core and a cladding trench for the design of few-mode fibers, aiming an arbitrary differential mode delay (DMD) flattened over the C+ L band. By optimizing the core grading exponent and the dimensioning of the trench, a deviation lower than 0.01 ps/km from a target DMD is observed over the investigated wavelength range. Additionally, it is found that the dimensioning of the trench is almost independent of the target DMD, thereby enabling the use of a simple design rule that guarantees a maximum DMD deviation of 1.8 ps/km for a DMD target between-200 and 200 ps/km. © 2012 IEEE.

Aglomeração urbana descontínua: o exemplo de Araguari e Uberlândia/MG

The analysis of urban conurbations demands the understanding regarding the difference between urban territorial continuity and spatial continuity. While the spatial continuity is understood due to its interrelations and established fluxes, in other words, through the spatial integration, the territorial continuity is related to the urban tissue. Therefore, the spatial continuity can manifest in a simultaneous way or associated to the territorial discontinuity. From this perspective, the main objective of this research consists on identifying and dimensioning the spatial interactions that are driven to a urban conurbation process between the municipalities of Araguari and Uberlândia/MG, besides the not continuity of the territorial urban area. The intensity of these interactions was identified from the displacements by the dwellers from both municipalities in search of job occupations, education and health assistance. So it would be able to reach the proposed objectives we used several methodological procedures, such as a bibliographic and documental researches. In order to identify the education and work fluxes we analyzed the micro data from the Demographic Census 2010. For the educational sector it was also accomplished a research, in Araguari, the place of residence of students enrolled at Instituto Master de Ensino Presidente Antônio Carlos (IMEPAC) and, in Uberlândia, the place of residence of students enrolled at Universidade Federal de Uberlândia (UFU). The identification of health fluxes was done through a research, in Uberlândia, of the inpatients' origin at Hospital de Clínicas de Uberlândia of the Universidade Federal de Uberlândia (HCU/UFU) and, in Araguari, of the origin of patients that are attended at the Pronto-Socorro Municipal. Semi structured interviews were also accomplished with different social actors. Another important step was the use of questionnaires with the inter-municipal public transportation users at their boarding place in Araguari and Uberlândia. This paper was organized in five chapters, while in the first one we accomplished a theoretical discussion over the concept of urban conurbation, in order to presenting the identification and classification criteria and the urban conurbation of non metropolitan criteria. The second chapter analyses the differentiation process between Araguari and Uberlândia, which is a result of the distinct territorial formation of the municipalities. The third chapter analyses the intensity and degree of the spatial interactions between the two municipalities, having as a focus the established fluxes in the work sector. The fourth chapter, on the other hand, focuses on the education and health sectors, while the last chapter accomplishes a discussion to investigate if the analyzed fluxes in the previous chapters make it able to identify if the spatial interactions established between Araguari and Uberlândia are measured through complementarities or dependence. As a result it was possible to identify that, due to the expressiveness of the established fluxes between the two municipalities, beyond the further ones of Triângulo Mineiro and Alto Paranaíba in the three selected sectors, there is a configuration of a discontinuous urban conurbation process. It was also possible to conclude that, despite the fluxes between Araguari and Uberlândia being more representative than the other way around there's a coexistence dependence relationship and complementarity between the two municipalities.

Comparison of indoor and outdoor fungi and particles in poultry units

A descriptive study was developed in order to compare indoor and outdoor air contamination caused by fungi and particles in seven poultry units. Twenty eight air samples of 25 litters were collected through the impaction method on malt extract agar. Air sampling and particles concentration measurement were done in the interior and also outside premises of the poultries’ pavilions. Regarding the fungal load in the air, indoor concentration of mold was higher than outside air in six poultry units. Twenty eight species / genera of fungi were identified indoor, being Scopulariopsis brevicaulis (40.5%) the most commonly isolated species and Rhizopus sp. (30.0%) the most commonly isolated genus. Concerning outdoor, eighteen species/genera of fungi were isolated, being Scopulariopsis brevicaulis (62.6%) also the most isolated. All the poultry farms analyzed presented indoor fungi different from the ones identified outdoors. Regarding particles’ contamination, PM2.5, PM5.0 and PM10 had a statistically significant difference (Mann-Whitney U test) between the inside and outside of the pavilions, with the inside more contaminated (p=.006; p=.005; p=.005, respectively). The analyzed poultry units are potential reservoirs of substantial amounts of fungi and particles and could therefore free them in the atmospheric air. The developed study showed that indoor air was more contaminated than outdoors, and this can result in emission of potentially pathogenic fungi and particles via aerosols from poultry units to the environment, which may post a considerable risk to public health and contribute to environmental pollution.