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- A Multidimensional Scaling Classification of Robotic SensorsPublication . Lima, Miguel F. M.; Tenreiro Machado, J. A.This chapter analyzes the signals captured during impacts and vibrations of a mechanical manipulator. Eighteen signals are captured and several metrics are calculated between them, such as the correlation, the mutual information and the entropy. A sensor classification scheme based on the multidimensional scaling technique is presented.
- Nonlinear Dynamics of Structures, Systems and DevicesPublication . Lacarbonara, Walter; Balachandran, Balakumar; Ma, Jun; Tenreiro Machado, J. A.; Stepan, GaborThis first of three volumes from the inaugural NODYCON, held at the University of Rome, in February of 2019, presents papers devoted to Nonlinear Dynamics of Structures, Systems and Devices. The collection features both well-established streams of research as well as novel areas and emerging fields of investigation. Topics in Volume I include multi-scale dynamics: coexistence of multiple time/space scales, large system dynamics; dynamics of structures/industrial machines/equipment/facilities (e.g., cable transportation systems, suspension bridges, cranes, vehicles); nonlinear interactions: parametric vibrations with single/multi-frequency excitations, multiple external and autoparametric resonances in multi-dof systems; nonlinear system identification: parametric/nonparametric identification, data-driven identification; experimental dynamics: benchmark experiments, experimental methods, instrumentation techniques, measurements in harsh environments, experimental validation of nonlinear models; wave propagation, solitons, kinks, breathers; solution methods for pdes: Lie groups, Hirota’s method, perturbation methods, etc; nonlinear waves in media (granular materials, porous materials, materials with memory); composite structures: multi-layer, functionally graded, thermal loading; fluid/structure interaction; nonsmooth and retarded dynamics: systems with impacts, free play, stick-slip, friction hysteresis; nonlinear systems with time and/or space delays; stability of delay differential equations, differential-algebraic equations; space/time reduced-order modeling: enhanced discretization methods, center manifold reduction, nonlinear normal modes, normal forms; fractional-order systems; computational techniques: efficient algorithms, use of symbolic manipulators, integration of symbolic manipulation and numerical methods, use of parallel processors; and multibody dynamics: rigid and flexible multibody system dynamics, impact and contact mechanics, tire modeling, railroad vehicle dynamics, computational multibody dynamics.
- Proceedings TAEE2020: prefacePublication . Fidalgo, André; Alves, Gustavo R.Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original conference proceedings.
- ICEER2019@Aveiro: Energy and environment - challenges towards circular economyPublication . Caetano, Nídia; Borrego, Carlos; Nunes, Maria Isabel; Felgueiras, CarlosThe 6th edition of the International Conference on Energy and Environment Research, ICEER 2019, took place in the end of July 2019, at the University of Aveiro, Portugal. With most of the participants coming from academia, and a few from the professional field, ICEER series is still growing and attracting increased interest. Energy production, distribution and use are fundamental for the Sustainable Development of nations, showing a clear link between the energy and environment issues. Nevertheless, these matters are frequently dealt with separately, reflecting the way they are taught, and causing strong negative impacts, and hindering progress. With a growing trend in circular economy models applied to common goods production and commercialization, ICEER 2019 had as focus theme the challenges posed by energy and environment research in a circular economy-based model. This paper presents the main achievements and conclusions of ICEER 2019 participants, through their research in the fields of energy and environment, including a brief analysis of the current requirements of Education on Sustainable Development applied to the modern technological curricula.
- Libro de atas del XIV Congreso de Tecnologías Aplicadas a la Enseñanza de la Electrónica (TAEE2020)Publication . Alves, Gustavo R.; Fidalgo, André; Felgueiras, Carlos; Costa, RicardoA conferencia TAEE conhecerá na sua 14ª edição um momento histórico. Não só é a primeira vez que a será organizada fora do território Espanhol, como terá lugar a verdadeiramente pioneira experiência de realizar esta conferência num formato puramente virtual no Instituto Superior de Engenharia do Porto. Esta opção representa a solução possível para um evidente problema mundial, que surgiu de forma repentina durante a preparação desta edição. Optamos por aplicar a típica abordagem de engenharia, instintivamente encarando este novo problema como uma verdadeira oportunidade, e aproveitando as limitações impostas para experimentar novas soluções para novas questões. Tentamos criar uma TAEE diferente, não melhor nem pior, mas indo buscar proveitos às tecnologias de comunicação emergentes de forma a criar e dinamizar um evento onde não estaremos fisicamente juntos, mas poderemos comunicar e conviver de forma virtual. A grande motivação da TAEE será sempre os visíveis entrosamentos, dedicação e motivação da comunidade e serão estes fatores que permitirão o sucesso nesta nova forma de estarmos e trabalharmos juntos, mas à distância.
- Proceedings of the IEEE Global Engineering Education Conference (EDUCON 2020Publication . Cardoso, Alberto; Alves, Gustavo R.; Restivo, Maria TeresaFocused on "Engineering Education for the future in a multicultural and smart world", the EDUCON2020 Online edition was based on a comprehensible program that included: • a pre-conference day with 9 workshops, which attracted approx. 300 remote participants; • 3 plenary sessions, including: • a unique opening interview with interveners physically located in two different time zones, with a span of 16 hours, in particular Keith Willey (interviewed), from Sydney, Australia, and Susan Zvacek (interviewer), from Denver, US. Henrique Santos, Vice President for Conferences and Workshops of the IEEE Education Society, located in Portugal, served as moderator. • a keynote by Annette Kolmos, about “Complex Problem Solving and PBL in Engineering Education”, moderated by José Carlos Quadrado. • and, a closing debate with Maria Graça Carvalho (a member of the European Parliament), Sebastião Feyo de Azevedo (Rector of Universidade Portucalense Infante D. Henrique), and João Gabriel Silva (Rector of the University of Coimbra from 2011 to 2019), who discussed about “The University and the Digital Transformation of Society”, in a debate moderated by Russ Meier, president of the IEEE Education Society. • and 44 technical sessions; 4 round tables, and 7 special sessions The technical program included 314 papers that underwent a double-blind review process with at least 3 independent reviewers. Considering a total number of 654 submissions, this results into a 50% acceptance rate. Finally, the EDUCON2020 online conference edition gathered more than 300 participants from 51 countries on 5 continents.
- Caracterização de erros experimentais em circuitos eletrônicos no Laboratório Remoto VISIR+Publication . Sasdelli, Isabelli; Alves, Gustavo R.; Valente Junior, Wilson; Schlichting, Luis Carlos MartinhagoProgramas de simulação e plataformas de experimentação são importantes aliados do estudante e pesquisador para unir conhecimentos teóricos e práticos. Frequentemente, durante a realização dos experimentos com circuitos elétricos e eletrônicos, os alunos cometem erros, sejam estes por falta de atenção ou por não assimilar corretamente algum conteúdo. Como forma de aprimorar esses conhecimentos e ampliar a experimentação, laboratórios remotos como Virtual Instruments Systems in Reality (VISIR) ganham espaço. Com o objetivo de construir um tutorial online para o auxílio dos estudantes, este artigo apresenta possíveis erros ao analisar experimentos com o diodo, expandindo assim trabalhos anteriores já publicados acerca desta temática, relacionada com a utilização do VISIR.
- Resultados e Extensões do Projeto VISIR+ no Brasil: Um olhar internacionalPublication . Alves, Gustavo R.; Pozzo, María Isabel; Beltran Pavani, Ana Maria; Silva, Juarez Bento; Oliveira, Vanderli; Peraça, Mauro Tavares; Nilsson, KristianEste livro foi produzido como parte das atividades que couberam à ABENGE no projeto VISIR+, que foi desenvolvido nos anos de 2016 e 2017 e que tem sua aplicação principal na área de Circuitos Elétricos e Eletrônicos com foco preponderante na Engenharia Elétrica e Eletrônica. Os capítulos seguintes, apresentam uma descrição mais detalhada do Projeto. O objetivo precípuo do projeto foi definir, desenvolver e avaliar um conjunto de módulos educacionais que envolvem experimentos práticos, virtuais e remotos, suportados pelo laboratório remoto denominado VISIR, que é um acrônimo para "Virtual Instrument Systems In Reality". O VISIR+ contou com financiamento da European Commission (DG EAC), Education, Audiovisual and Culture Executive Agency (EACEA) e National Erasmus+ Offices National Agencies EU Delegations. O coordenador do projeto foi o professor Gustavo Ribeiro Alves do Instituto Politécnico do Porto (IPP) e a equipe foi constituída por docentes das Instituições participantes do projeto.
- Incremental Hotel Recommendation with Inter-guest Trust and Similarity Post-filteringPublication . Leal, Fátima; Malheiro, Benedita; Burguillo, Juan CarlosCrowdsourcing has become an essential source of information for tourists and tourism industry. Every day, large volumes of data are exchanged among stakeholders in the form of searches, posts, shares, reviews or ratings. Specifically, this paper explores inter-guest trust and similarity post-filtering, using crowdsourced ratings collected from the Expedia and TripAdvisor platforms, to improve hotel recommendations generated by incremental collaborative filtering. First, the profiles of hotels and guests are created using multi-criteria ratings and inter-guest trust and similarity. Next, incremental model-based collaborative filtering is adopted to predict unknown hotel ratings based on the multicriteria ratings and, finally, post-recommendation filtering sorts the generated predictions based on the inter-guest trust and similarity. The proposed method was tested both off-line (post-processing) and on-line (real time processing) for performance comparison. The results highlight: (i) the increase of the quality of recommendations with the inter-guest trust and similarity; and (ii) the decrease of the predictive errors with the online incremental collaborative filtering. Thus, this work contributes with a novel method, integrating incremental collaborative filtering and interguest trust and similarity post-filtering, for on-line hotel recommendation based on multi-criteria crowdsourced rating streams.
- YouTube Timed Metadata Enrichment Using a Collaborative ApproachPublication . Pinto, José Pedro; Viana, PaulaAlthough the growth of video content in online platforms has been happening for some time, searching and browsing these assets is still very inefficient as rich contextual data that describes the content is still not available. Furthermore, any available descriptions are, usually, not linked to timed moments of content. In this paper, we present an approach for making social web videos available on YouTube more accessible, searchable and navigable. By using the concept of crowdsourcing to collect the metadata, our proposal can contribute to easily enhance content uploaded in the YouTube platform. Metadata, collected as a collaborative annotation game, is added to the content as time-based information in the form of descriptions and captions using the YouTube API. This contributes for enriching video content and enabling navigation through temporal links.