Agents and Peer-to-Peer Computing: First International by Gianluca Moro, Aris M. Ouksel, Claudio Sartori (auth.),

By Gianluca Moro, Aris M. Ouksel, Claudio Sartori (auth.), Gianluca Moro, Manolis Koubarakis (eds.)

Peer-to-peer (P2P) computing is at present attracting huge, immense public recognition, spurred via the recognition of file-sharing structures comparable to Napster, Gnutella, and Morpheus. In P2P platforms a really huge variety of self sustaining computing nodes, the friends, depend upon one another for companies. P2P networks are rising as a brand new allotted computing paradigm as a result of their strength to harness the computing strength of the hosts composing the community, and since they make their underutilized assets on hand to every other.

This ebook brings jointly 3 specifically commissioned invited articles, an creation, and revised types of the papers offered on the 1st foreign Workshop on brokers and Peer-to-Peer Computing, AP2PC 2002, held in Bologna, Italy in July 2002. The ebook is prepared into topical sections on peer-to-peer prone, discovery and supply of reliable companies, and seek and cooperation in peer-to-peer agent systems.

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Extra info for Agents and Peer-to-Peer Computing: First International Workshop, AP2PC 2002 Bologna, Italy, July 15, 2002 Revised and Invited Papers

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Adds ∞ to the depth of the branch where it is attached. Peer Services: From Description to Invocation 31 Fig. 8. Extended tree matching Figure 8 shows examples of such matching. In this way, we can quantify the quality of matching between a requested service Sr and a proposed service Sp . In this case, we say that Sp matches the functionality requested, the behaviour requested or the quality of service requested at a depth belonging to N ∪ {∞}. The service that is then invoked is the service having the most important depth matching (by order of preference functionality, behaviour and quality of service).

A P2P network may be made of many different programs (programmed by different people on different platforms) disposing of many various connectivity grouped by a P2P interaction protocol. It provides (distributed) services. One of the main point in P2P architectures is that peers provide and use services in parallel. Being a peer contractually implies that you may use services from other peers and that they may use your services. In 1 Measure made in April 2002. G. Moro and M. ): AP2PC 2002, LNAI 2530, pp.

The policy evaluator obtains role programs with deduced role names from the policy package. Role programs are Java objects in VPC-Ps. The role assignment part creates instances of role programs with initialization according to “init description” in the policy package, and adds them into the corresponding communities. , an }. , ci → ri }. An activation rule consists of a pair of conditions, which is the combination of attributes (ck = ak1 ∧ ... ∧ akn ), and a role rk to activate. An evaluator E(A, W ) = {rk |ck → rk ∈ W, ck A} is a function that determines a set of roles according to user attributes and activation rules.

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