Recursos de colección

Repositório Comum (40.364 recursos)

É um repositório para instituições de ensino e investigação produtoras de literatura científica cuja dimensão ainda não justifica a criação de um repositório próprio. Permite integrar instituições, grupos ou indivíduos na infra-estrutura do projecto, nomeadamente através das pesquisas do Portal RCAAP e da B-On.

Mostrando recursos 1 - 20 de 34

  1. Spy Walker: A Convenient Way to Assess Gait in Walker Assistive Devices

    Viegas, Vítor; Pereira, José Dias; Postolache, Octavian; Girão, Pedro Silva
    Trabalho apresentado em 2018 IEEE International Instrumentation and Measurement Technology Conference, 14-17 maio 2018, Houston, TX, USA

  2. Teamwork Evaluation with a Microworld Platform

    Sapateiro, Cláudio; Antunes, Pedro; Enwereuzo, Ijeoma; Johnstone, David; Pino, José A.
    Trabalho apresentado em IEEE 20th International Conference on Computer Supported Cooperative Work in Design,4-6 maio 2016, Nanchang, China

  3. Internal Banking Auditing: From Conceptual Proposal to Technological Aids Development

    Constantino, Gudilak; Sapateiro, Cláudio
    Trabalho apresentado em CENTERIS 2016 - Conference on ENTERprise Information Systems, outibro 2016, Porto, Portugal

  4. A Piezoelectric Device for Measurement and Power Harvesting Applications

    Alves, M.; Pereira, José Dias; Fonseca, J. M.
    Com o apoio RAADRI.

  5. Open Controller for Distributed Instrumentation Systems

    Viegas, Vítor; Girão, P. Silva; Pereira, José Dias
    The paper presents a controller designed to be highly interoperable in the context of distributed instrumentation systems. Interoperability is achieved by adopting strong standards – the IEEE 1451.1 Std to be more precise – and by using cross-platform, manufacturer-independent technologies such as Web Services. The 1451.1 Std contributes with its information model to represent data and organize functionalities through a well-defined hierarchy of objects. Web Services are used to implement both communication models, the client/server model for one-to-one communications, and the publish/subscribe model for one-to-many communications. Being supported by all the major software companies around the world, Web Services have the...

  6. Service-Oriented Distributed Measurement and Control Systems: A Case Study

    Viegas, Vítor; Girão, P. Silva; Pereira, José Dias
    The paper presents a Distributed Measurement and Control System (DMCS) applied to a physical process equipped with all the instrumentation needed to run control loops for temperature, level, flow and pressure, quantities widely found in the process industry. The system is supported by a service-oriented middleware platform based on the IEEE 1451.1 std and the Windows Communication Foundation (WCF). Tests were made to evaluate the performance of the system in terms of sampling frequency and behavior of control loops. The methodology of each experiment is described, results are analyzed and conclusions are extracted.

  7. Using a Commercial Framework to Implement and Enhance the IEEE 1451.1 Standard

    Viegas, Vítor; Pereira, José Dias; Girão, P. Silva
    In 1999, the 1451.1 Std was published defining a common object model and interface specification to develop open, multi-vendor distributed measurement and control systems. However, despite the well-known advantages of the model, few have been the initiatives to implement it. In this paper we describe the implementation of a NCAP – Network Capable Application Processor, in a well-known and well-proven infrastructure: the Microsoft .NET Framework. The choice of a commercial framework was part of our strategy: to take advantage of several “of the shelf” technologies and adapt them to produce a NCAP prototype, called NCAP/XML. In addition, a solution to...

  8. IEEE 1451.1 Standard and XML Web Services: a Powerful Combination to Build Distributed Measurement and Control Systems

    Viegas, Vítor; Pereira, José Dias; Girão, P. Silva
    In 2005, we presented the NCAP/XML, a prototype of NCAP (Network Capable Application Processor) that runs under the .NET Framework and makes available its functionality through a set of Web Services using XML (eXtended Markup Language). Giving continuity to this project, it is time to explain how to use the NCAP/XML to build a Distributed Measurement and Control System (DMCS) compliant with the 1451.1 Std. This paper is divided in two main parts: in the first part, we present the new software architecture of NCAP/XML (which suffered some changes since the first version), and secondly, we describe the network configuration...

  9. Next Generation Application Processor Based on the IEEE 1451.1 Standard and Web Services

    Viegas, Vítor; Pereira, José Dias; Girão, P. Silva
    Over the last decade, the 1451.1 Std has been a reference model to develop smart and open distributed measurement and control systems. Now, that the 1451.1 Std is about to be revised, there is the opportunity to enrich it with emergent and successful technologies as is the case of Web Services. Following this idea, we present a prototype of Network Capable Application Processor (NCAP) that runs on the .NET Framework and exposes its functionality through a set of Web Services. The prototype takes advantage of three key technologies: (i) the abstraction layer proposed by the 1451.1 Std; (ii) the interoperability provided...

  10. Performance Evaluation of a Web-Service-Based DMCS

    Viegas, Vítor; Girão, P. Silva; Pereira, José Dias
    The paper describes a set of experiments conducted on a service-oriented middleware infrastructure in order to evaluate its performance and applicability in the context of Distributed Measurement and Control Systems (DMCS). The infrastructure, entirely based on Web Services, was built using the Windows Communication Foundation (WCF), a software package released by Microsoft to develop distributed applications. The experiments were performed on a real plant equipped with all the instrumentation needed to run control loops for pressure, level, flow and temperature, quantities widely found in the process industry. The work focus on measuring the time delays associated with control loops and...

  11. Stability in the Pseudo-state Formalism of Discrete Systems Controlled in the Presence of Intermittent Sensor Faults

    Dionísio, Rui Vilela; Lemos, João M.
    Trabalho apresentado em IFAC Workshop on Adaptation and Learning in Control and Signal Processing, 26-28 de Agosto de 2010, Antalya, Turquia.

  12. Computing Parity Space Residuals’ Computational Form With MIMO Predictive Models

    Dionísio, Rui Vilela; Lemos, João M.
    Trabalho apresentado em 12th Mediterranean Conference on Control and Automation MED’04, 6-9 de Junho de 2004, Kusadasi, Turquia.

  13. Isomerisation of pinene oxide in the presence of an indenyl Molybdenum carbonyl complex

    Gamelas, Carla A.; Bruno, Sofia; Gomes, A. C.; Abrantes, Marta; Oliveira, Maria da Conceição; Valente, Anabela; Almeida-Paz, Filipe; Pillinger, Martyn; Romão, Carlos C.; Gonçalves, Isabel S.
    Trabalho apresentado 18th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis, 28 june - 2 july 2015, Barcelona, Spain

  14. Selective preparation of campholenic aldehyde using indenyl Molybdenum dicarbonyl complexes

    Bruno, Sofia; Gamelas, Carla A.; Gomes, Ana C.; Valente, Anabela; Pillinger, Martyn; Romão, Carlos C.; Gonçalves, isabel S.
    Trabalho apresentado nas Jornadas CICECO, 14-15 de abril 2015, Aveiro, Portugal

  15. Use of organomolybdenum compounds for promoted hydrolysis of phosphoester bonds in aqueous media

    Gamelas, Carla A.; Gomes, A. C.; Fernandes, José; Almeida-Paz, Filipe; Nunes, Patrique; Pillinger, Martyn; Gonçalves, Isabel S.; Romão, Carlos; Abrantes, Marta
    Trabalho apresentado em 6th EuCheMS Chemistry Congress, 11-15 september 2016, Seville, Spain

  16. Isomerisation of pinene oxide in the presence of an indenyl Molybdenum carbonyl complex

    Gamelas, Carla A.; Bruno, Sofia; Gomes, A. C.; Abrantes, Marta; Oliveira, Maria da Conceição; Valente, Anabela; Almeida-Paz, Filipe; Pillinger, Martyn; Romão, Carlos C.; Gonçalves, Isabel S.
    Trabalho apresentado no 18th IUPAC International Symposium on Organometallic Chemistry Directed Towards Organic Synthesis, 28 june- 02 july 2015, Barcelona, Spain

  17. Mo(VI) catalysts obtained from eta3-Allyl Dicarbonyl Precursors: Synthesis, Characterization and Catalytic Performance in Cyclooctene Epoxidation

    Gomes, Ana C.; Gamelas, Carla A.; Bruno, Sofia; Almeida Paz, Filipe; Valente, Anabela; Pillinger, Martyn; Romão, Carlos C.; Gonçalves, Isabel S.
    Trabalho apresentado na XXV International Conference on Organometallic Chemistry ICOMC, 2-7 september 2012, Lisbon, Portugal

  18. Indenyl ring slippage in crown thioether complexes IndMo(CO)2L+ and C-S activation of trithiacyclononane: experimental and theoretical studies

    Gamelas, Carla A.; Bandeira, Nuno; Pereira, Cláudia; Calhorda, Maria José; Herdtweck, Eberhardt; Machuqueiro, Miguel; Romão, Carlos C.; Veiros, Luís
    Trabalho em XXV International Conference on Organometallic Chemistry, ICOMC, 2-7 september 2012, lisbon, Portugal

  19. M(II) Indenyl derivatives as catalysts for the isomerization of pinene oxide

    Bruno, Sofia; Gamelas, Carla A.; Gomes, Ana C.; Valente, Anabela; Pillinger, Martyn; Romão, Carlos C.; Gonçalves, Isabel S.
    Trabalho apresentado em XXV International Conference on Organometallic Chemistry, ICOMC, 2-7 september 2012, Lisbon, Portugal

  20. Molybdenum(VI) Catalysts obtained from eta3-Allyl Dicarbonyl Precursors: Synthesis, Characterization and Catalytic Performance in Cyclooctene Epoxidation

    Gamelas, Carla A.; Gomes, Ana C.; Bruno, Sofia; Almeida Paz, Filipe; Valente, Anabela; Pillinger, Martyn; Romão, Carlos C.; Gonçalves, Isabel S.
    Trabalho apresentado nas IX Jornadas CICECO, 2-3 maio 2012, Aveiro, Portugal

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