127 research outputs found

    Robot trajectory generation, simulation and execution for shotcrete automation

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    Shotcrete is a widely used civil and mining engineering method that consists of projecting concrete at high-speed using specialized equipment. Nowadays, the trajectory of the projection nozzle is still controlled by an operator (manually or by teleoperation). Automating this process has the potential to improve shotcrete efficiency, quality, and worker safety. This report details the work done within the RoboShot@FRC project, to automate the generation and execution of trajectories for robot-based application of shotcrete in the reinforcement of railway tunnels. The developed work focused on two main components: one that generates a set of poses based on an input mesh of the surface to be shotcreted (path generation program), and another one that simulates the shotcrete process. Extensive tests were done in a simulated environment, and some tests were also performed in real robots. The path generation and shotcrete simulation programs were used together to optimize the trajectory parameters, in order to maximize the resulting concrete layer homogeneity.POCI-01-0247-FEDER-047075LISBOA-01-0247-FEDER-047075Call CEECINST/00051/201

    Editorial

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    Ensinar pelo Projecto O ensino e aprendizagem de Projecto de Arquitectura, contrariamente ao que a designação da disciplina deixaria supor, não é uma aplicação prática (o projecto) de uma teoria prévia (a arquitectura). Movendo-se num campo complexo que convoca o conhecimento implícito, a experiência pessoal, a consciência crítica, a reflexão-na-acção, ou a síntese operativa, o Projecto de Arquitectura é uma disciplina de síntese que se socorre tanto das ciências sociais, como das artes e humanidades, ou das ciências e tecnologias, para construir um argumento narrativo transformador. Pode-se por isso pensar que embora com uma forte componente prática, o seu objectivo é a construção teórica da Arquitectura e também, inversamente, que a sua eficácia teórica ou reflexiva estará dependente da sua materialização prática e instrutiva Teaching through Design Despite of what the name may lead one to believe, Architectural Design Studio teaching and learning is not a practical application (project) of a previous theory (architecture). It moves in a complex field that calls for implicit knowledge, personal experience, critical conscience, reflection- in-action, or operative synthesis, the Architectural Design Studio is a discipline of synthesis that resorts to social sciences, and as arts and humanities, or sciences and technologies, to build a transforming narrative argument. Albeit showing, a strong practical approach, its main goal is a theoretical construction of architecture. However, its theoretical efficacy is dependent upon its practical and instructive materialization

    Good for the Nation, Good for the People?

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    2nd Reuse of Modernist Buildings Workshop: Coimbra Modern City today: from functional buildings to community spaces

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    After the 1st RMB Student Workshop 2017 in the region of Marl (Germany), the 2nd edition worked in Coimbra, a historical university city in the centre of Portugal. In April 2018, the Reuse of Modernist Buildings (RMB) project, financed by ERASMUS+, organized the 2nd RMB Workshop to rethink the urban areas developed according to the De Groer Urban Plan of 1940.After the 1st RMB Student Workshop 2017 in the region of Marl (Germany), the 2nd edition worked in Coimbra, a historical university city in the centre of Portugal. In April 2018, the Reuse of Modernist Buildings (RMB) project, financed by ERASMUS+, organized the 2nd RMB Workshop to rethink the urban areas developed according to the De Groer Urban Plan of 1940

    Airway and Respiratory Devices in the Prevention of Ventilator-Associated Pneumonia

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    Ventilator-associated pneumonia (VAP) is the most common ICU-acquired infection among patients under mechanical ventilation (MV). It may occur in up to 50% of mechanically ventilated patients and is associated with an increased duration of MV, antibiotic consumption, increased morbidity, and mortality. VAP prevention is a multifaceted priority of the intensive care team. The use of specialized artificial airways and other devices can have an impact on the prevention of VAP. However, these devices can also have adverse effects, and aspects of their efficacy in the prevention of VAP are still a matter of debate. This article provides a narrative review of how different airway and respiratory devices may help to reduce the incidence of VAP.publishersversionpublishe

    Projeto de um mecanismo para simular o movimento da articulação de um joelho cadavérico

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    Tese de mestrado. Mestrado integrado em Engenharia Mecânica. Faculdade de Engenharia. Universidade do Porto. 201

    Debate social e construção do território

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    Sente-se cada dia mais activo o debate acerca da posição em que se colocam os profissionais que actuam sobre o território ou, de um modo mais genérico, sobre a organização do espaço em que vivemos. Arquitectos, urbanistas, cientistas sociais e decisores políticos desdobram-se em reflexões acerca da maior ou menor participação das populações nos processos de decisão que levam às transformações das cidades e do território, bem como dos espaços habitacionais de promoção pública. São analisadas, ..

    Debate social e construção do território

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    Sente-se cada dia mais activo o debate acerca da posição em que se colocam os profissionais que actuam sobre o território ou, de um modo mais genérico, sobre a organização do espaço em que vivemos. Arquitectos, urbanistas, cientistas sociais e decisores políticos desdobram-se em reflexões acerca da maior ou menor participação das populações nos processos de decisão que levam às transformações das cidades e do território, bem como dos espaços habitacionais de promoção pública. São analisadas, ..
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