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Quorum systems-collections of sets with pairwise nonempty intersections-are used in distributed settings to implement services such as consensus and consistent memory. Quorums have been substantially studied in static settings, however the design and analysis of quorum-based distributed services in resource-limited ad hoc networks is a relatively unexplored area. The pioneering work of Chockler, Gilbert,...
Developing middleware services for dynamic distributed systems, e.g., ad-hoc networks, is a challenging task given that such services deal with dynamically changing membership and asynchronous communication. Algorithms developed for static settings are often not usable in such settings because they rely on (logical) all-to-all node connectivity through routing protocols, which may be unfeasible or...
Accurate and fast image segmentation algorithms are of paramount importance for a wide range of medical imaging applications. Level set algorithms based on narrow band implementation have been among the most widely used segmentation algorithms. However, the accuracy of standard level set algorithms is compromised by the fact that their evolution schemes deteriorate the signed distance level set functions...
The resource discovery problem, where cooperating machines need to find one another in a network, was introduced by Harchol-Balter, Leighton, and Lewin (1999) in the context of Akamai Technologies with the goal of building an Internet-wide content-distribution system. In the solutions for the synchronous setting proposed so far in the papers by Harchol-Bartel et al. (1999), Kutten et al. (2001) and...
A fuzzy knowledge-based network is developed based on the linguistic rules extracted from a fuzzy decision tree. A scheme for automatic linguistic discretization of continuous attributes, based on quantiles, is formulated. A novel concept for measuring the goodness of a decision tree, in terms of its compactness (size) and efficient performance, is introduced. Linguistic rules are quantitatively evaluated...
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