Implementação de supermercados na produção na empresa Schnellecke

Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Mecânica Manutenção e Produção

Project, modelling and simulation of air stripping columns for the treatment of groundwater contaminated with volatile organic compounds

Volatile organic compounds are a common source of groundwater contamination that can be easily removed by air stripping in columns with random packing and using a counter-current flow between the phases. This work proposes a new methodology for the column design for any particular type of packing and contaminant avoiding the necessity of a pre-defined diameter used in the classical approach. It also renders unnecessary the employment of the graphical Eckert generalized correlation for pressure drop estimates. The hydraulic features are previously chosen as a project criterion and only afterwards the mass transfer phenomena are incorporated, in opposition to conventional approach. The design procedure was translated into a convenient algorithm using C++ as programming language. A column was built in order to test the models used either in the design or in the simulation of the column performance. The experiments were fulfilled using a solution of chloroform in distilled water. Another model was built to simulate the operational performance of the column, both in steady state and in transient conditions. It consists in a system of two partial non linear differential equations (distributed parameters). Nevertheless, when flows are steady, the system became linear, although there is not an evident solution in analytical terms. In steady state the resulting system of ODE can be solved, allowing for the calculation of the concentration profile in both phases inside the column. In transient state the system of PDE was numerically solved by finite differences, after a previous linearization.

Innovative manufacturing process for hybrid pultruded products based on cork and polymeric pre-shapes

Pultruded products are being targeted by a growing demand due to its excellent mechanical properties and low chemical reactivity, ensuring a low level of maintenance operations and allowing an easier assembly operation process than equivalent steel bars. In order to improve the mechanical drawing process and solve some acoustic and thermal insulation problems, pultruded pipes of glass fibre reinforced plastics (GFRF) can be filled with special products that increase their performance regarding the issues previously referred. The great challenge of this work was drawing a new equipment able to produce pultruded pipes filled with cork or polymeric pre-shaped bars as a continuous process. The project was carried out successfully and the new equipment was built and integrated in the pultrusion equipment already existing, allowing to obtain news products with higher added-value in the market, covering some needs previously identified in the field of civil construction.

Overproduction, crystallization and preliminary X-ray characterization of Abn2, an endo-1,5-alpha-arabinanase from Bacillus subtilis.

Acta Crystallographica F64 (2008) 636-638

Estudo sobre as diferenças interativas e comunicativas de educadores e educadoras com crianças em idade pré escolar

Dissertação apresentada na Escola Superior de Educação de Lisboa para obtenção do grau de Mestre em Ciências da Educação - Especialidade Intervenção Precoce

O estranho caso do romancista e dos livros pretos que ele escreveu: a propósito da obra de Gonçalo M. Tavares e dos espectáculos "Sobreviver" e "Jerusalém"

Trazer a matéria romanesca para o palco tem sido uma das mais dilectas tentações do drama contemporâneo. Em Portugal, há um universo de um romancista em particular que tem despertado o interesse de alguns criadores teatrais: Gonçalo M. Tavares (n.1970). Sendo também um dramaturgo, é no romance que a excelência superlativa da sua escrita se tem afirmado e tem sido reconhecida. Neste artigo abordo dois espectáculos que partiram de romances de Gonçalo M. Tavares que fazem parte do ciclo “O Reino-Livros Pretos”: Sobreviver, encenado por Lúcia Sigalho /Sensurround, apresentado no S. Luiz Teatro Municipal (Lisboa), em Fevereiro de 2006; e Jerusalém, encenado por João Brites / Teatro o bando, apresentado no Centro Cultural de Belém (Lisboa), em Outubro de 2008. Sobreviver, de Sigalho, foi o resultado de um trabalho de escrita cénica, realizado pela encenadora e pelo colectivo de actores, sobre os livros pretos de Gonçalo M. Tavares Um homem: Klaus Klump, A máquina de Joseph Walser e Jerusalém (e também um excerto de O senhor Brecht). Jerusalém, de Brites partia da obra homónima de M. Tavares, estando a sua matriz performativa mais próxima da narrativa original. A dramaturgia do espectáculo construía-se sobre a mesma cartografia de horror e mal que o romance habitava. Havia, contudo, um ímpeto no sentido de poder expandir os significados do texto e encontrar ecos de guerra e violência noutras latitudes.

A New Approach in the Design of Air Stripping Columns for the Treatment of Groundwater Contaminated With Volatile Organic Compounds

Volatile organic compounds are a common source of groundwater contamination that can be easily removed by air stripping in columns with random packing and using a counter-current flow between the phases. This work proposes a new methodology for column design for any type of packing and contaminant which avoids the necessity of an arbitrary chosen diameter. It also avoids the employment of the usual graphical Eckert correlations for pressure drop. The hydraulic features are previously chosen as a project criterion. The design procedure was translated into a convenient algorithm in C++ language. A column was built in order to test the design, the theoretical steady-state and dynamic behaviour. The experiments were conducted using a solution of chloroform in distilled water. The results allowed for a correction in the theoretical global mass transfer coefficient previously estimated by the Onda correlations, which depend on several parameters that are not easy to control in experiments. For best describe the column behaviour in stationary and dynamic conditions, an original mathematical model was developed. It consists in a system of two partial non linear differential equations (distributed parameters). Nevertheless, when flows are steady, the system became linear, although there is not an evident solution in analytical terms. In steady state the resulting ODE can be solved by analytical methods, and in dynamic state the discretization of the PDE by finite differences allows for the overcoming of this difficulty. To estimate the contaminant concentrations in both phases in the column, a numerical algorithm was used. The high number of resulting algebraic equations and the impossibility of generating a recursive procedure did not allow the construction of a generalized programme. But an iterative procedure developed in an electronic worksheet allowed for the simulation. The solution is stable only for similar discretizations values. If different values for time/space discretization parameters are used, the solution easily becomes unstable. The system dynamic behaviour was simulated for the common liquid phase perturbations: step, impulse, rectangular pulse and sinusoidal. The final results do not configure strange or non-predictable behaviours.

A Tribo : o teatro como ferramenta para a liberdade : trabalho de projeto

Trabalho de Projeto submetido à Escola Superior de Teatro e Cinema para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Teatro - especialização em Teatro e Comunidade.

O teatro como lugar de reinvenção de públicos: conceções sobre a formação do espectador

Dissertação apresentada à Escola Superior de Educação de Lisboa para obtenção de grau de mestre em Educação Artística, na especialização de Teatro na Educação

Towards Active Course Marks for Autonomous Sailing Competitions

This paper describes the environmental monitoring / regatta beacon buoy under development at the Laboratory of Autonomous Systems (LSA) of the Polytechnic Institute of Porto. On the one hand, environmentalmonitoring of open water bodies in real or deferred time is essential to assess and make sensible decisions and, on the other hand, the broadcast in real time of position, water and wind related parameters allows autonomous boats to optimise their regatta performance. This proposal, rather than restraining the boats autonomy, fosters the development of intelligent behaviour by allowing the boats to focus on regatta strategy and tactics. The Nautical and Telemetric Application (NAUTA) buoy is a dual mode reconfigurable system that includes communications, control, data logging, sensing, storage and power subsystems. In environmental monitoring mode, the buoy gathers and stores data from several underwater and above water sensors and, in regatta mode, the buoy becomes an active course mark for the autonomous sailing boats in the vicinity. During a race, the buoy broadcasts its position, together with the wind and the water current local conditions, allowing autonomous boats to navigate towards and round the mark successfully. This project started with the specification of the requirements of the dual mode operation, followed by the design and building of the buoy structure. The research is currently focussed on the development of the modular, reconfigurable, open source-based control system. The NAUTA buoy is innovative, extensible and optimises the on board platform resources.

Contributo para o estudo do tempo de espera para radioterapia em Portugal : adaptação de um instrumento de recolha de dados

RESUMO - É reconhecido o impacto negativo e prejudicial que o tempo de espera tem para radioterapia sobre o controlo tumoral e a taxa de sobrevida, bem como a importância de estabelecer tempos máximos para o início do tratamento, de forma a garantir o cumprimento de uma boa prática. O presente projecto de investigação tem o objectivo de construir e validar uma grelha de observação, como instrumento de recolha de dados, que se pretende no futuro aplicar, de forma a poder contribuir para o estudo sobre o tempo de espera para radioterapia em Portugal. Para alcançar o objectivo proposto, optou-se pela metodologia usada por Drinkwater e Williams na re-auditoria efectuada no Reino Unido pelo Royal College of Radiologists, em 2007, sobre os tempos de espera para radioterapia. A grelha de observação elaborada foi baseada na grelha utilizada por Drinkwater e Williams, na revisão da literatura, e tendo em consideração a realidade portuguesa. Após a análise das respostas dos peritos, ao questionário de avaliação e adequação do instrumento à realidade portuguesa, parece existir concordância na adequação do instrumento, o que nos permite afirmar a possibilidade da aplicação do mesmo nos centros de radioterapia de Portugal. --- --------------------------------ABSTRACT - It is recognized the negative impact that radiotherapy waiting time have in tumour control and survival, as well the importance of establish maximum waiting times for the start of the treatment, in the sense to guarantee a good practice. The present investigation project aim is to build and validates a data collection tool, which pretends to apply in the future, in the sense to contribute for the study of the radiotherapy waiting time in Portugal. To accomplish the project aim, we chose the method used by Drinkwater and Williams in the re-audit performed in United Kingdom for the Royal College of Radiologists, in 2007, about the radiotherapy waiting time. The data collection tool built was based on the data collection tool used by Drinkwater and Williams, on the literature review and taking in account the Portuguese reality. After the analyse of the experts answers, it seems to exist agreement about the adequacy of the data collection tool, which allow us to claim the possibility of the tool application at radiotherapy centres, in Portugal.

O papel do homem na educação de infância: construção de uma identidade profissional no masculino

Relatório da Prática Profissional Supervisionada Mestrado em Educação Pré-Escolar

A construção da autonomia na educação de infância: o papel do(a) educador(a)

Relatório da Prática Profissional Supervisionada Mestrado em Educação Pré-Escolar

A view of Teresa Ambrósio's work and life (1936-2007)

Proceedings of the 4th international conference Hands - on Science - Development, Diversity and Inclusion in Science Education, 109-115

Distributed Belief Revision and Environmental Decision Support

This article discusses the development of an Intelligent Distributed Environmental Decision Support System, built upon the association of a Multi-agent Belief Revision System with a Geographical Information System (GIS). The inherent multidisciplinary features of the involved expertises in the field of environmental management, the need to define clear policies that allow the synthesis of divergent perspectives, its systematic application, and the reduction of the costs and time that result from this integration, are the main reasons that motivate the proposal of this project. This paper is organised in two parts: in the first part we present and discuss the developed - Distributed Belief Revision Test-bed - DiBeRT; in the second part we analyse its application to the environmental decision support domain, with special emphasis on the interface with a GIS.