ISEP – CIETI – Livro, parte de livro, ou capítulo de livro
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- Collaborative learning in a qeb-accessible workbenchPublication . Ferreira, José M.; Alves, Gustavo R.; Costa, Ricardo J.; Hine, NickWeb-based course management and delivery is regarded by many institutions as a key factor in an increasingly competitive education and training world, but the systems currently available are largely unsatisfactory in terms of supporting collaborative work and access to practical science facilities. These limitations are less important in areas where “pen-and-paper” courseware is the mainstream, but become unacceptably restrictive when student assignments require real-time teamwork and access to laboratory equipment. This paper presents a web-accessible workbench for electronics design and test, which was developed in the scope of an European IST project entitled PEARL, with the aim of supporting two main features: full web access and collaborative learning facilities.
- On-line defragmentation for run-time partially reconfigurable FPGAsPublication . Gericota, Manuel G.; Alves, Gustavo R.; Silva, Miguel L.; Ferreira, José M.Dynamically reconfigurable systems have benefited from a new class of FPGAs recently introduced into the market, which allow partial and dynamic reconfiguration at run-time, enabling multiple independent functions from different applications to share the same device, swapping resources as needed. When the sequence of tasks to be performed is not predictable, resource allocation decisions have to be made on-line, fragmenting the FPGA logic space. A rearrangement may be necessary to get enough contiguous space to efficiently implement incoming functions, to avoid spreading their components and, as a result, degrading their performance. This paper presents a novel active replication mechanism for configurable logic blocks (CLBs), able to implement on-line rearrangements, defragmenting the available FPGA resources without disturbing those functions that are currently running.
- Run-time defragmentation for dynamically reconfigurable hardwarePublication . Gericota, Manuel G.; Alves, Gustavo R.; Silva, Miguel L.; Ferreira, José M.Reconfigurable computing experienced a considerable expansion in the last few years, due in part to the fast run-time partial reconfiguration features offered by recent SRAM-based Field Programmable Gate Arrays (FPGAs), which allowed the implementation in real-time of dynamic resource allocation strategies, with multiple independent functions from different applications sharing the same logic resources in the space and temporal domains. However, when the sequence of reconfigurations to be performed is not predictable, the efficient management of the logic space available becomes the greatest challenge posed to these systems. Resource allocation decisions have to be made concurrently with system operation, taking into account function priorities and optimizing the space currently available. As a consequence of the unpredictability of this allocation procedure, the logic space becomes fragmented, with many small areas of free resources failing to satisfy most requests and so remaining unused. A rearrangement of the currently running functions is therefore necessary, so as to obtain enough contiguous space to implement incoming functions, avoiding the spreading of their components and the resulting degradation of system performance. A novel active relocation procedure for Configurable Logic Blocks (CLBs) is herein presented, able to carry out online rearrangements, defragmenting the available FPGA resources without disturbing functions currently running.
- A new approach to assess defragmentation strategies in dynamically reconfigurable FPGAsPublication . Gericota, Manuel G.; Alves, Gustavo R.; Lemos, L. F.; Ferreira, José M.Fragmentation on dynamically reconfigurable FPGAs is a major obstacle to the efficient management of the logic space in reconfigurable systems. When resource allocation decisions have to be made at run-time a rearrangement may be necessary to release enough contiguous resources to implement incoming functions. The feasibility of run-time relocation depends on the processing time required to set up rearrangements. Moreover, the performance of the relocated functions should not be affected by this process or otherwise the whole system performance, and even its operation, may be at risk. Relocation should take into account not only specific functional issues, but also the FPGA architecture, since these two aspects are normally intertwined. A simple and fast method to assess performance degradation of a function during relocation and to speed up the defragmentation process, based on previous function labelling and on the application of the Euclidian distance concept, is proposed in this paper.
- Remote lab experiments: opening possibilities for distance learning in engineering fieldsPublication . Herrera, Oriel; Alves, Gustavo R.; Fuller, David; Aldunate, Roberto G.Remote experimentation laboratories are systems based on real equipment, allowing students to perform practical work through a computer connected to the internet. In engineering fields lab activities play a fundamental role. Distance learning has not demonstrated good results in engineering fields because traditional lab activities cannot be covered by this paradigm. These activities can be set for one or for a group of students who work from different locations. All these configurations lead to considering a flexible model that covers all possibilities (for an individual or a group). An inter-continental network of remote laboratories supported by both European and Latin American institutions of higher education has been formed. In this network context, a learning collaborative model for students working from different locations has been defined. The first considerations are presented.
- Ponderação e sequência de utilização de diferentes ambientes laboratoriais no processo ensino-aprendizagemPublication . Costa-Lobo, Cristina; Duarte, Marina; Alves, Gustavo R.; Oliveira, Paulo C.O processo ensino-aprendizagem tem sido alvo constante de estudos, em particular ao nível do Ensino Superior em consequência do aumento anual de novos alunos que, em termos meramente estatísticos, têm vindo a evidenciar um abaixamento progressivo das médias de acesso. A preocupação com a manutenção de um determinado nível de qualidade na formação destes alunos, conjugada com a vontade de alargar o acesso a todos aqueles que terminam o Ensino Secundário, despoletou uma maior intervenção dos especialistas em educação, em parceria com docentes de todas as áreas do Ensino Superior, na análise do problema. Considerando o caso particular das Ciências e Engenharias, onde a componente laboratorial no processo ensino- aprendizagem assume um papel relevante, os recentes avanços ao nível das tecnologias educativas criaram alternativas válidas aos ambientes laboratoriais tradicionais, nomeadamente os ambientes laboratoriais virtuais e remotos, ainda não totalmente exploradas. Em paralelo, assiste-se também a uma crescente preocupação com a análise dos estilos de aprendizagem, em resultado da crescente heterogeneidade que caracteriza, de forma global, os alunos que optam por aquelas áreas do Ensino Superior. Dispondo os docentes de uma variedade crescente de recursos educativos e de métodos de ensino, em face de um leque alargado de alunos com estilos de aprendizagem próprios, importa estudar de que forma se pode ponderar e sequenciar os diferentes tipos de ambientes laboratoriais, para atingir o objectivo geral de aumentar o nível do saber e das competências experimentais dos alunos que optam pelas Ciências e Engenharias.
- Using remote labs in education: two little ducks in remote experimentationPublication . Zubía, Javier García; Alves, Gustavo R.A book about remote labs and engineering education begs to begin with the question, “Why do engineering programs include lab work?” Although this may seem like a given and not worth discussing, whenever we’re faced with innovative ideas, it’s important to “put everything on the table” in order to reassess its value to our program or goals. What is it about lab work that is of value to students? Are there elements of traditional labs that we could let go of? Are there elements that we don’t want to lose? These questions can help us to clarify how and why labs are integrated into an engineering education program.
- Acoustic Emission Studies in Hip Arthroplasty – Peak Stress Impact In Vitro Cemented ProsthesisPublication . Gueiral, Nuno; Nogueira, ElisabeteEngineering has a very important role in the development of non-destructive monitoring of orthopaedical systems allowing the evaluation of its integrity. Sir John Charnley revolutionized the field of joint arthroplasty in the 1960s with the development of the total hip replacement. He replaced the diseased hip joint with a steel femoral component and a plastic acetabular socket cup combination, both fixed into the bone using a self-curing acrylic cement, polymethylmethacrylate (PMMA) (Browne et al, 2005). That way, he has restored some of the most problematic joints in the human body. The placement of the metal implant in the channel open in the femoral bone without using cement or by mechanical attack, called a non cemented arthroplasty, came into use in an effort to solve the problem.
- Optimal location of gas supply units in natural gas system networkPublication . Nogueira, Teresa; Vale, ZitaNatural gas industry has been confronted with big challenges: great growth in demand, investments on new GSUs – gas supply units, and efficient technical system management. The right number of GSUs, their best location on networks and the optimal allocation to loads is a decision problem that can be formulated as a combinatorial programming problem, with the objective of minimizing system expenses. Our emphasis is on the formulation, interpretation and development of a solution algorithm that will analyze the trade-off between infrastructure investment expenditure and operating system costs. The location model was applied to a 12 node natural gas network, and its effectiveness was tested in five different operating scenarios.
- A tool to aid institutions recognize their employees competences acquired by informal learningPublication . García-Peñalvo, Francisco J.; Zangrando, Valentina; García-Holgado, Alicia; Conde-González, Miguel Ángel; Seoane-Pardo, António-M.; Alier, Marc; Galanis, Nikolas; López, Jordi; Janssen, José; Brouns, Francis; Finders, Anton; Berlanga, Adriana; Sloep, Peter; Griffiths, David; Johnson, Mark; Waszkiewicz, Elwira; Mykowska, Aleksandra; Minović, Miroslav; Milovanovic, Milos; Marques, Maria A.; Viegas, C.; Alves, Gustavo R.People do not learn only in formal educational institutions, but also throughout their lives, from their experiences, conversations, observations of others, exploration of the Internet, meetings and conferences, and chance encounters etc. However this informal and non-formal learning can easily remain largely invisible, making it hard for peers and employers to recognize or act upon it. The TRAILER project aims to make this learning visible so that it can benefit both the individual and the organization. The proposed demonstration will show a software solution that (i) helps the learners to capture, organize and classify a wide range of ’informal’ learning taking place in their lives, and (ii) assists the organization in recognizing this learning and use it to help managing human resources (benefiting both parts). This software tool has recently been used in two phases of pilot studies, which have run in four different European countries.