Gene Major

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The Human-Computer Interaction Laboratory (HCIL) of the University of Maryland and NASA have collaborated over the last three years to refine and apply user interface research concepts developed at HCIL in order to improve the usability of NASA data services. The research focused on dynamic query user interfaces, visualization, and overview +preview(More)
The Global Change Master Directory (GCMD) is an earth science repository that specifically tracks research data on global climatic change. The GCMD is migrating from a centralized architecture to a globally distributed replicated heterogeneous federated system. One of the greatest challenges facing database research is the integration of heterogeneous(More)
The Global Change Master Directory (GCMD) is an earth science information repository that tracks research data on global climatic change. Building a directory of Earth science metadata that allows the exchange of metadata content among partner organizations is challenging because of the complex issues involved in supporting heterogeneous metadata schema,(More)
This demonstration focuses on the implementation of an asynchronous transaction protocol [1,6, 8] which satisfies the requirement of replicating DlF entries through the internet across continents in the International Directory Network (IDN). We have designed a Primary Site Distribution protocol which is asynchronous but active i.e. participating sites in(More)
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