There are many resources and services in grid environment which may be distributed geographically. So, resource discovery methods with lower update and discovery costs are of vital significance. The centralized methods have the advantage of improved management of nodes, but in a grid with large number of nodes and resources, a bottleneck is caused in the server, which reduces the system efficac...

research in the context of a multifunctional knowledge base: The Botany Knowledge Base project. [30] Suzanne McBride. A graphic access and presentation tool for related knowledge base concepts. Master's thesis, [26] James C. Lester and Bruce W. Porter. A revision-based model of instructional multi-paragraph discourse production. 37 The View Retriever will be evaluated more extensively when it s...

This paper is on the homotopy classification of maps of (n+1)-dimensional manifolds into the n-dimensional sphere. For a continuous map f : M → S define the degree deg f ∈ H1(M;Z) to be the class dual to f[S], where [S] ∈ H(S;Z) is the fundamental class. We present a short and direct proof of the following specific case of the Pontryagin-Steenrod-Wu theorem: Theorem. Let M be a connected orient...

Read-copy update (RCU) is a light-weight synchronization mechanism that has been used in production for well over a decade, most recently, as part of the Linux kernel. Although RCU is well-understood in the sense that practitioners are able to make good use of it without special training, there are a number of intriguing open questions related to RCU. This paper introduces a number of such ques...

Since the requirement of data warehouse is increasing, it is necessary to develop eflcient mechanisms for data warehouses incorporating various kinds of database systems. Essentially, materialized views are used for data warehouses and various methods for relational databases have been developed. In this paper, we will first discuss a method to realize materialized views for object-on’ented dat...

in this paper, a formal model for antivirus update agent system is presented based on mobile agent technology and predicate/transition petri nets. the mobile agent system contains two mobile agents called dca and una. it sends out agents to update antivirus on client computers in a network. each agent takes on a specified responsibility. first, dca roams through the network and check the last d...