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Papers by Eurico Carrapatoso
Proceedings of 19th Convention of Electrical and Electronics Engineers in Israel
Page 1. FAST CREATION OF DISTRIBUTED SERVICES: SDL TO ANSA TRANSLATION Paula Cristina Oliveira UT... more Page 1. FAST CREATION OF DISTRIBUTED SERVICES: SDL TO ANSA TRANSLATION Paula Cristina Oliveira UTAD - Dep. Engenharias 5000 VILA REALIPORTUGAL ABSTRACT Communication networks are in continuous ...
Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model,... more Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model, architecture style, configuration and reconfiguration of distributed systems. Abstract Distributed systems are hard to manage ...
The traditional attitude towards user interfaces has changed. The Post-WIMP era has brought about... more The traditional attitude towards user interfaces has changed. The Post-WIMP era has brought about novel input modalities such as touch, tangibles or gestures that allow users to manipulate digital contents more intuitively. These novel input modalities make use of the users' innate skills instead of imposing the learning of new interaction techniques. Nonetheless, there has not been a systematic evaluation on how, or if, these interfaces influence the users' performance and/or preference: distinct interfaces may be more or less appropriate regarding different age groups, user profiles, contexts or type of tasks. This work is a preliminary evaluation on whether the users' efficiency is indeed influenced by different input modalities or age. We conducted a target acquisition performance evaluation with 60 subjects to understand how different input modalities influence the speed and accuracy of three specific age groups (children, young adults and older-adults) when dealing with a continuous selection task. Three input modalities were considered to perform the task (mouse, touch and gestures) and the methodology was based on Fitts' law, a target acquisition performance evaluation model. Overall, when comparing movement times amongst the three groups, there are significant differences between age groups regarding the index of performance. We believe our findings may show that indeed the type of input modality used and the user's age could affect one's performance.
... Mapa do Campus. Traffic generator/detector system concept. Artigo em Acta de Conferência Inte... more ... Mapa do Campus. Traffic generator/detector system concept. Artigo em Acta de Conferência Internacional. Autores: Eurico Carrapatoso C. Aguiar Manuel Pereira Ricardo. Idioma: Português. Ano: 1990. Conferência: EFOC/LAN. Local: Munique. Data: 27 a 29 de junho de 1990. ...
Technical advances in communication networks and terminal equipment make possible the provision o... more Technical advances in communication networks and terminal equipment make possible the provision of a wide range of new and appealing telecommunication services. However, the increasing user demand and the strong market competition require that the creation of those services is efficient and fast, and that they have attractive interfaces. The complexity of networks and distributed systems, which support those services,
UCOL (which stands for Ultra-wideband Coherent Optical LAN) is a system aiming to provide integra... more UCOL (which stands for Ultra-wideband Coherent Optical LAN) is a system aiming to provide integrated support of narrowband and broadband services (data, voice and video) to the need of specific localized communication environments. This report presents the advances of UCOL after the first year of the realization phase. A number of modifications have been made since the original plan, allowing the project to be feasible applying current technology. The new approach to the physical layer is described together with the already developed optical subsystems; finally the UCOL access protocol is reported
O Domus Cursos on-line é um sistema de ensino baseado na Web que tem aplicação em duas áreas do... more O Domus Cursos on-line é um sistema de ensino baseado na Web que tem aplicação em duas áreas do ensino o ensino presencial eo ensino à distância. A sua aplicação no ensino presencial permite disponibilizar conteúdos de disciplinas na Internet ea discussão de ...
Mais e melhores acessos à Internet, bem como um preço atractivo, fazem com que seja cada vez maio... more Mais e melhores acessos à Internet, bem como um preço atractivo, fazem com que seja cada vez maior o interesse em transportar voz e vídeo sobre redes de dados. Neste contexto nasceu a Telefonia sobre IP, que oferece através desta infra-estrutura a oportunidade de criar sistemas globais de comunicação multimédia. O Session Initiation Protocol, utilizado nesta arquitectura, é um protocolo de sinalização e controlo de chamadas entre dois ou mais participantes. Neste artigo é feita uma apresentação do serviço de Telefonia sobre IP, são analisados diversos protocolos tipicamente usados na arquitectura protocolar da IPtel, e é explicada a arquitectura e o funcionamento do protocolo SIP. São também referidos vários modos de mobilidade disponibilizados pelo SIP ao nível da aplicação. Finalmente são apresentadas algumas características do sIPtel, um sistema IPtel desenvolvido em Java com suporte para vídeo e que utiliza o protocolo SIP na sinalização de chamadas
Proceedings of 19th Convention of Electrical and Electronics Engineers in Israel
Technical advances in communication networks and terminal equipment make possible the provision o... more Technical advances in communication networks and terminal equipment make possible the provision of a wide range of new and appealing telecommunication services. However, the increasing user demand and the strong market competition require that the creation of those services is efficient and fast, and that they have attractive interfaces. The complexity of networks and distributed systems, which support those services,
Smart Innovation, Systems and Technologies, 2013
ABSTRACT
Video Communications and PACS for Medical Applications, 1993
ABSTRACT This contribution describes a Videotex terminal with photographic capabilities based on ... more ABSTRACT This contribution describes a Videotex terminal with photographic capabilities based on a personal computer (PC). This system takes advantage of a recently available support--the Integrated Services Digital Network (ISDN)--which represents a significant improvement in the performance of communication systems, and is intended to offer a new and practical service while maintaining compatibility with the Alphamosaic Videotex.
fccn.pt
Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model,... more Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model, architecture style, configuration and reconfiguration of distributed systems. Abstract Distributed systems are hard to manage ...
Distributed Imaging (Ref. No. 1999/109), …, 2002
Page 1. Collaborative Editing of Digital Video José Benjamim Fonseca UTAD, Dep. Engenharias, 5001... more Page 1. Collaborative Editing of Digital Video José Benjamim Fonseca UTAD, Dep. Engenharias, 5001-911 Vila Real, Portugal Eurico Manuel Carrapatoso FEUP/INESC, 4050-497 Porto, Portugal Abstract This paper presents ...
Web Services emerged in the last few years to allow the exchange of data in distributed environme... more Web Services emerged in the last few years to allow the exchange of data in distributed environments using common Internet technologies and has been used mainly to build business-to-business applications. This paper presents a prototype application that enables the cooperative editing of digital video clips, using web services to build the underlying cooperation infrastructure.
Proceedings of 19th Convention of Electrical and Electronics Engineers in Israel
Page 1. FAST CREATION OF DISTRIBUTED SERVICES: SDL TO ANSA TRANSLATION Paula Cristina Oliveira UT... more Page 1. FAST CREATION OF DISTRIBUTED SERVICES: SDL TO ANSA TRANSLATION Paula Cristina Oliveira UTAD - Dep. Engenharias 5000 VILA REALIPORTUGAL ABSTRACT Communication networks are in continuous ...
Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model,... more Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model, architecture style, configuration and reconfiguration of distributed systems. Abstract Distributed systems are hard to manage ...
The traditional attitude towards user interfaces has changed. The Post-WIMP era has brought about... more The traditional attitude towards user interfaces has changed. The Post-WIMP era has brought about novel input modalities such as touch, tangibles or gestures that allow users to manipulate digital contents more intuitively. These novel input modalities make use of the users' innate skills instead of imposing the learning of new interaction techniques. Nonetheless, there has not been a systematic evaluation on how, or if, these interfaces influence the users' performance and/or preference: distinct interfaces may be more or less appropriate regarding different age groups, user profiles, contexts or type of tasks. This work is a preliminary evaluation on whether the users' efficiency is indeed influenced by different input modalities or age. We conducted a target acquisition performance evaluation with 60 subjects to understand how different input modalities influence the speed and accuracy of three specific age groups (children, young adults and older-adults) when dealing with a continuous selection task. Three input modalities were considered to perform the task (mouse, touch and gestures) and the methodology was based on Fitts' law, a target acquisition performance evaluation model. Overall, when comparing movement times amongst the three groups, there are significant differences between age groups regarding the index of performance. We believe our findings may show that indeed the type of input modality used and the user's age could affect one's performance.
... Mapa do Campus. Traffic generator/detector system concept. Artigo em Acta de Conferência Inte... more ... Mapa do Campus. Traffic generator/detector system concept. Artigo em Acta de Conferência Internacional. Autores: Eurico Carrapatoso C. Aguiar Manuel Pereira Ricardo. Idioma: Português. Ano: 1990. Conferência: EFOC/LAN. Local: Munique. Data: 27 a 29 de junho de 1990. ...
Technical advances in communication networks and terminal equipment make possible the provision o... more Technical advances in communication networks and terminal equipment make possible the provision of a wide range of new and appealing telecommunication services. However, the increasing user demand and the strong market competition require that the creation of those services is efficient and fast, and that they have attractive interfaces. The complexity of networks and distributed systems, which support those services,
UCOL (which stands for Ultra-wideband Coherent Optical LAN) is a system aiming to provide integra... more UCOL (which stands for Ultra-wideband Coherent Optical LAN) is a system aiming to provide integrated support of narrowband and broadband services (data, voice and video) to the need of specific localized communication environments. This report presents the advances of UCOL after the first year of the realization phase. A number of modifications have been made since the original plan, allowing the project to be feasible applying current technology. The new approach to the physical layer is described together with the already developed optical subsystems; finally the UCOL access protocol is reported
O Domus Cursos on-line é um sistema de ensino baseado na Web que tem aplicação em duas áreas do... more O Domus Cursos on-line é um sistema de ensino baseado na Web que tem aplicação em duas áreas do ensino o ensino presencial eo ensino à distância. A sua aplicação no ensino presencial permite disponibilizar conteúdos de disciplinas na Internet ea discussão de ...
Mais e melhores acessos à Internet, bem como um preço atractivo, fazem com que seja cada vez maio... more Mais e melhores acessos à Internet, bem como um preço atractivo, fazem com que seja cada vez maior o interesse em transportar voz e vídeo sobre redes de dados. Neste contexto nasceu a Telefonia sobre IP, que oferece através desta infra-estrutura a oportunidade de criar sistemas globais de comunicação multimédia. O Session Initiation Protocol, utilizado nesta arquitectura, é um protocolo de sinalização e controlo de chamadas entre dois ou mais participantes. Neste artigo é feita uma apresentação do serviço de Telefonia sobre IP, são analisados diversos protocolos tipicamente usados na arquitectura protocolar da IPtel, e é explicada a arquitectura e o funcionamento do protocolo SIP. São também referidos vários modos de mobilidade disponibilizados pelo SIP ao nível da aplicação. Finalmente são apresentadas algumas características do sIPtel, um sistema IPtel desenvolvido em Java com suporte para vídeo e que utiliza o protocolo SIP na sinalização de chamadas
Proceedings of 19th Convention of Electrical and Electronics Engineers in Israel
Technical advances in communication networks and terminal equipment make possible the provision o... more Technical advances in communication networks and terminal equipment make possible the provision of a wide range of new and appealing telecommunication services. However, the increasing user demand and the strong market competition require that the creation of those services is efficient and fast, and that they have attractive interfaces. The complexity of networks and distributed systems, which support those services,
Smart Innovation, Systems and Technologies, 2013
ABSTRACT
Video Communications and PACS for Medical Applications, 1993
ABSTRACT This contribution describes a Videotex terminal with photographic capabilities based on ... more ABSTRACT This contribution describes a Videotex terminal with photographic capabilities based on a personal computer (PC). This system takes advantage of a recently available support--the Integrated Services Digital Network (ISDN)--which represents a significant improvement in the performance of communication systems, and is intended to offer a new and practical service while maintaining compatibility with the Alphamosaic Videotex.
fccn.pt
Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model,... more Page 1. 1 Keywords: object-oriented framework, reflective and architecture aware component model, architecture style, configuration and reconfiguration of distributed systems. Abstract Distributed systems are hard to manage ...
Distributed Imaging (Ref. No. 1999/109), …, 2002
Page 1. Collaborative Editing of Digital Video José Benjamim Fonseca UTAD, Dep. Engenharias, 5001... more Page 1. Collaborative Editing of Digital Video José Benjamim Fonseca UTAD, Dep. Engenharias, 5001-911 Vila Real, Portugal Eurico Manuel Carrapatoso FEUP/INESC, 4050-497 Porto, Portugal Abstract This paper presents ...
Web Services emerged in the last few years to allow the exchange of data in distributed environme... more Web Services emerged in the last few years to allow the exchange of data in distributed environments using common Internet technologies and has been used mainly to build business-to-business applications. This paper presents a prototype application that enables the cooperative editing of digital video clips, using web services to build the underlying cooperation infrastructure.