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11.1 INTRODUCTION Since the early days of mankind the primary motivation for the establishment of communities has been the idea that by being part of an organized group the capabilities of an individual are improved. The great progress in the area of intercomputer communication led to the development of means by which stand-alone processing subsystems can(More)
We discuss the problem of earthquake forecasting in the context of new models for the dynamics based on statistical physics. Here we focus on new, topologically realistic system-level approaches to the modeling of earthquake faults. We show that the frictional failure physics of earthquakes in these complex, topologically realistic models leads to(More)
We describe Peer-to-Peer Grids built around Integration of technologies from the peer-to-peer and Grid fields. We focus on the role of Web services linked by a powerful event service using uniform XML interfaces and application level routing. We describe how a rich synchronous and asynchronous collaboration environment can support virtual communities built(More)
Computational scientists often develop large models and codes intended to be used by larger user communities or for repetitive tasks such as parametric studies. Lowering the barrier of entry for access to these codes is often a technical and sociological challenge. Portals help bridge the gap because they are well known interfaces enabling access to a large(More)
Particle-in-Cell (PIC) plasma simulation codes model the interaction of charged particles with surrounding electrostatic and magnetic fields. Its computational requirements made it to be classified as one of the grand-challenge problems facing the high performance community. In this paper we present the implementation of 1-D and 2-D electrostatic PIC codes(More)
We formed a community of interest from industry, academia, and government, with the goal of developing a consensus set of Big Data requirements across all stakeholders. The major activities were gathering various use cases from diversified application domains and extracting requirements. Initially we developed a use case template with 26 fields, and these(More)
Grids Here we propose a way of describing systems built from Service oriented Grids in a way that allows one to build new Grids by composing and adapting existing collections (libraries) of Grids. We also suggest some " best practices " in deciding how to architect services and package systems. We have of course discussed Grids extensively here in previous(More)
The development of next-generation sequencing technology has made it possible to generate millions of sequences from environmental samples. However, the difficulty associated with taxonomy-independent analysis increases as the sequence size expands. Most of the existing algorithms, which aim to generate operational taxonomic units (OTUs), require quadratic(More)