Encontrados 18 documentos, a visualizar página 1 de 2
Procedure Information System for justice purveyor's office
Fernandes, Marco; Alho, Miguel; Almeida, Pedro; Martins, Joaquim Arnaldo; Pinto, Joaquim Sousa; Zagalo, HélderThis article presents the project Sistema de Informação Processual, developed in the University of Aveiro for the Provedoria de Justiça. The system allows scarching, retrieving, presenting and annotating the digital processes. In the paper, we describe the strategy adopted in the storage and manipulation of the digital documents, the search of information in multiple repositories and the development of a parall...
Descrição de vídeo com multimedia content description interface (MPEG-7)
Almeida, Pedro; Martins, Joaquim Arnaldo; Pinto, Joaquim SousaThis article presents one brief introduction to the MPEG-7 standard, Multimedia Content Description Interface, and one of the possible applications to describe videos of a digital library, in a way that it makes possible indexing and searching this information.; Neste artigo apresentamos uma breve introdução ao standard MPEG-7, Multimedia Content Description Interface, e uma forma de o aplicar na desc...
Contributions for the Study of Protocol Architectures for high-speed Lans
Martins, Joaquim Arnaldo; Alves, Jorge CarvalhoThis work relates the OSI model and the Pseudo-Star LAN, defining a fast and flexible protocol architecture. A new concept to access the Pseudo-Star LAN is introduced, based on the definition of a generic access interface (IAPE) and specialised access processors (PAPE). The protocols proposed to access the Pseudo-Star are the IEEE 802.3; a PAPE implementing the IBASES option (Starlan) was built. (...); Este tra...
A Development and integration framework for network management applications
Oliveira, Jose Luís Guimarães; Martins, Joaquim ArnaldoThe LANs and WANs have nowadays a great role on ever social and economical groups, from scientific and military communities to the civil society. This importance comes from the, increasing demand to share information and resources. The expansion of the number of installed networks and attached systems implies new problems, namely that concerning the network management. (...); As redes de comunicação de dados oc...
An experimental study on voice speech integration on TC/IP LAN
Azevedo, Joaquim José Silva; Martins, Joaquim ArnaldoLocal computer networks, today widely spread, have emerged from the need of exchanging data between terminals, computers and all sorts of network servers. However, the spoken word still remains the communication mode of choice for mankind - in the form of two-way conversations, one-way broadcasts and others. The use of local networks for the transmission of voice/data traffic has been subject of many studies. (...
Evolution and integration of telecommunication system management architectures
Fernandes, José Pedro; Martins, Joaquim ArnaldoThe development and the convergence of technologies forces that, nowadays, the target scenery of the administration of nets, in its true dimension, have to include, besides the administration of the sets of telecommunications and of the administration of the nets of multimedia computers, the administration of systems and applications. (...); O desenvolvimento e a convergência de tecnologias força a que, hoje em...
CORBA architecture and TMN mangement
Paiva, Laura; Martins, Joaquim ArnaldoThis dissertation theme, for obtaining the Master's degree in Electronic and Telecommunications Engineering of fhe University of Aveiro, is centred basically in the analysis and use of the CORBA technology as an infrastructure to support the implementation of platforms for administration of telecommunications networks that follow the TMN an architecture. (...); O tema desta dissertação para obtenção do grau de ...
Hypermedia authoring collaborative system
Zagalo, Helder Troca; Martins, Joaquim ArnaldoThe collaboration and the teamwork have been always a way to congregate efforts between individuals, with the goal to achieve tasks that are difficult to achieve alone. Sometimes, the collaboration between people is useful too for the enrichment process of the personal experiente. (...); A colaboração e o trabalho em grupo têm consistido, desde sempre, numa forma de congregação de esforços entre indivíduos, com...
CORBA security
Coimbra, Carlos Manuel Dias; Martins, Joaquim ArnaldoAttacks on computerized systems are increasing at a rapid rate. Due to their very nature, distributed systems are especially vulnerable. Thus, security is if great importance in such systems. (...); Neste trabalho descreve-se uma arquitectura de objectos distribuídos, o CORBA, que através do seu serviço de segurança permite desenvolver aplicações de objectos distribuídos de uma forma segura. (...)
Videoconferência multiponto
Costa, José Manuel; Teixeira, Pedro Miguel; Pinto, Joaquim Sousa; Martins, Joaquim ArnaldoHere is described the project and the implementation of a broadcast video conference system for Windows95 using the VCON software development kit ARMADA CRUSER 100. A communications protocol was developed to allow an easier control of the video conference. This protocol was implemented over the TCP/IP protocolsuite using datagram connections allowing the creation of adistributed environment where neither are de...