At current on-line shops, buyers almost independently enjoy shopping without anyone's help. However, there are many cases where they cooperate with people such as personal ad...
Large scale open multi-agent systems where agents need services of other agents but may not know their contact information require agent location mechanisms. Solutions to this pro...
Due to the wide range of services being supported, telecommunications networks are loaded with massive quantities of information. This stimulates extra concern for network surviva...
We introduce the concept of a group principal and present a number of different classes of group principals, including threshold-group-principals. These appear to naturally usefu...
The Internet has evolved from an information space to a market space with thousands of electronic storefronts, auctions and other commercial services. This market space is not with...
Rosane Maria Martins, Magali Ribeiro Chaves, Luci ...