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The environmental science and engineering communities are actively engaged in planning and developing the next generation of large-scale sensor-based observing systems. These systems face two significant challenges: heterogeneity of instrumentation and complexity of data stream processing. Environmental observing systems incorporate instruments across the(More)
One of the popular stories told (and taught) in development circles is how corruption was slashed in Uganda simply by publishing the amount of monthly grants to schools. This paper takes a deeper look at the facts behind the Uganda story and finds that while information did indeed play a critical role, the story is much more complicated than we have been(More)
China's Regulations on Open Government Information introduce a freedom of information style disclosure mechanism across China from 1 May 2008. Despite sincere political commitment, the central government is facing enormous obstacles in ensuring consistent implementation of the regulations nationwide. The center is not providing a strong legal text or clear(More)
Earthquake engineers have traditionally investigated the behavior of structures with either computational simulations or physical experiments. Recently, a new hybrid approach has been proposed that allows tests to be decomposed into independent substructures that can be located at different test facilities, tested separately, and integrated via a(More)
Existing simulation models, with carefully designed elements of a genetic algorithm, automatically create test inputs, eliminating the task of manual creation. A n essential aspect of a high-quality design process is the development of test patterns, or sets of test inputs, that can be applied to the final product or intermediate instantiations to identify(More)
The NEESgrid project is revolutionizing the way earthquake engineering (EE) researchers collaborate to plan, perform, share and publish research even while being geographically separated. The proposed demonstration is in complement to the NEESgrid paper titled "Distributed Hybrid Earthquake Engineering Experiments: Experiences with a Ground-Shaking Grid(More)
We present a hierarchical control theory for supervisory automata based on state aggregation. Conditions are determined on state partitions which ensure that the control of transitions between blocks in a high level (i.e. aggregated) model, combined with local state-dependent controls, is eeective in the sense of achieving speciications given either for the(More)