In a clustered multimedia server, by periodically evaluating client demand for each file and performing selective replication of those files with the highest demand, the files can be distributed among server nodes to achieve load balancing. This technique is referred to as dynamic replication. Several dynamic replication policies have been proposed in the past, but to our knowledge, our work is...

This paper describes the progress of our work on autonomic faulttolerant multi-agent systems. Our starting point is that new generation distributed applications are increasingly dynamic and open, e.g., new agents can join or leave, they can change roles or strategies and interdependences with other agents. Thus the traditional approach of configuring fault tolerance techniques (e.g., through re...

Grid computing is the virtualization and pooling of IT resources such as compute power, storage and network capacity, and so on into a single set of shared services that can be provisioned or distributed, and then redistributed as needed. Researchers integrate the mobile devices in the grid which results in Mobile Grid. The mobile agent paradigm has attracted many attentions recently but it is ...

The growth of clusters into cluster collections increases potential points of failures, requiring the implementation of a fault-tolerance scheme. The CoHNOW is organized as a hierarchical master-worker scheme and clusters may be geographically distributed and interconnected by Internet. This paper describes a system of Fault-Tolerant protection by Data Replication (FT-DR), based on preserving c...

The problem of statistics and aggregate maintenance over data streams has gained popularity in recent years especially in telecommunications network monitoring, trendrelated analysis, web-click streams, stock tickers, and other time-variant data. The amount of data generated in such applications can become too large to store, or if stored too large to scan multiple times. We consider queries ov...

The explosive growth of spatial data worldwide coupled with the emergence of GRID computing provides a strong motivation for designing a spatial GRID which allows transparent access to geographically distributed data. While different types of queries may be issued from any node in such a spatial GRID for retrieving the data stored at other (remote) nodes in the GRID, this paper specifically add...

DNA replication, similar to other cellular processes, occurs within dynamic macromolecular structures. Any comprehensive understanding ultimately requires quantitative data to establish and test models of genome duplication. We used two different super-resolution light microscopy techniques to directly measure and compare the size and numbers of replication foci in mammalian cells. This analysi...

This paper proposes CADRE (Collaborative Allocation and De-allocation of Replicas with Efficiency), which is a dynamic replication scheme for improving the typically low data availability in dedicated and cooperative mobile ad-hoc peer-to-peer (M-P2P) networks. In particular, replica allocation and deallocation are collaboratively performed in tandem to facilitate effective replication. Such co...