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- research-articleMarch 2009
On Query Algebras for Probabilistic Databases
This article proposes a core query algebra for probabilistic databases. In essence, this core is part of the query languages of most probabilistic database systems proposed so far, but is sometimes hidden in complex language definitions. We give a ...
- research-articleJune 2008
The Sloan Digital Sky Survey and beyond
Our collaboration with Jim Gray has created some of the world's largest astronomy databases, and has enabled us to test many avant-garde ideas in practice. The astronomers have been very receptive to these and embraced Jim as a 'card carrying member' of ...
- articleSeptember 2005
Simplifying construction of complex workflows for non-expert users of the Southern California Earthquake Center Community Modeling Environment
- Philip Maechling,
- Hans Chalupsky,
- Maureen Dougherty,
- Ewa Deelman,
- Yolanda Gil,
- Sridhar Gullapalli,
- Vipin Gupta,
- Carl Kesselman,
- Jihic Kim,
- Gaurang Mehta,
- Brian Mendenhall,
- Thomas Russ,
- Gurmeet Singh,
- Marc Spraragen,
- Garrick Staples,
- Karan Vahi
Workflow systems often present the user with rich interfaces that express all the capabilities and complexities of the application programs and the computing environments that they support. However, non-expert users are better served with simple ...
- articleJune 2004
Issues in mechanical engineering design management
The Virtual Parts Engineering Research Center (VPERC), funded by the Army Research Office, focuses on building frameworks, tools, and technologies for making engineered systems sustainable and maintainable thanks to a virtual engineering environment ...