Encontrados 17 documentos, a visualizar página 1 de 2
Contributions for the Study of Protocol Architectures for high-speed Lans
Joaquim Arnaldo Martins; Jorge Carvalho AlvesThis 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. (...)keywords:&n...
A Development and Integration Framework for Network Management Applications
Jose Luís Guimarães Oliveira; Joaquim Arnaldo MartinsThe 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. (...)Keywords: network management; ma...
An Experimental Study on Voice Speech Integration on TC/IP LAN
Joaquim José Silva Azevedo; Joaquim Arnaldo MartinsLocal 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 lntegration of Telecommunication System Management Architectures
José Pedro Fernandes; Joaquim Arnaldo MartinsThe 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. (...)Keywords: TMN; CORBA; user interfaceM.S., 1997more info. http:...
CORBA Architecture and TMN mangement
Laura Paiva; Joaquim Arnaldo MartinsThis 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. (...)Keywords: TMN; CORBA; IDL; GDMO/ASN.1; gateway ...
Hypermedia Authoring Collaborative System
Helder Troca Zagalo; Joaquim Arnaldo MartinsThe 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. (...)Keywords: CSCW; collaborative systems; authoring systems; hypermedia; multimedia; distance learningM.S., 1998more in...
CORBA Security
Carlos Manuel Dias Coimbra; Joaquim Arnaldo MartinsAttacks 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. (...)Keywords: security; CORBAM.S., 1998more info. http://opac.ua.pt/F/?func=find-b&find_code=SYS&REQUEST=000117056 ; Neste trabalho descreve-se uma arquitectura de objectos distribuídos, o CORBA,...
Descrição de vídeo com Multimedia Content Description Interface (MPEG-7)
Pedro Almeida; Joaquim Arnaldo Martins; Joaquim Sousa PintoThis 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 Interfa...
Player Cooperativo de Documentos Hipermédia
António Silva; Joaquim Sousa Pinto; Joaquim Arnaldo MartinsThis article presents an system to edit cooperative documents. Should allow many users to work together cooperate between them, share an document that may have text, graphics, images, etc.For that, had been specified some general services, organised in conferences, as well algorithms to control thecooperation. It had been supported by an interface to TCP/IP and WFW network. An hypermedia Player based onthe tech...
Videoconferência Multiponto
José Manuel Costa; Pedro Miguel Teixeira; Joaquim Sousa Pinto; Joaquim Arnaldo MartinsHere is described the project and the implementation of a broadcast videoconference system for Windows95 using the VCON software development kit ARMADA CRUSER 100. A communications protocol was developed to allow an easier control of the videoconference.This protocol was implemented over the TCP/IP protocolsuite using datagram connections allowing the creation of adistributed environment whe...
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