Patrick Cassidy

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Interventional oncology procedures such as thermal ablation are becoming routine for many cancers. Hydrodissection-separating tissues with fluids-protects tissues near the treatment zone to improve ablation's safety and facilitate more aggressive treatments. However, currently used fluids such as normal saline and 5% dextrose in water (D5W) migrate in the(More)
ecent studies and much debate have focused on quantifying the airflow requirements of respirator users, particularly under conditions of very high to maximal work rates. It is often assumed that respirators and their components must be tested at flow rates that closely match these measurements to assure protection to users. This overly simplified assumption(More)
On March 14-15 in Gaithersburg, MD, at the US National Institute of Standards and Technology (NIST), the Upper Ontology Summit (UOS) took place. The Upper Ontology Summit was a convening of custodians of several prominent upper ontologies, key ontology technology participants, and interested other parties, with the purpose of finding a means to relate the(More)
The COSMO foundation ontology is being developed to test the hypothesis that there are a relatively small number (under 10,000) of primitive ontology elements that are sufficient to serve as the building blocks for any number of more specialized ontology elements representing concepts and terms used in any computer application. Finding evidence for this(More)
The vision of a Semantic Web of intelligence knowledge has yet to be fully realized, in part because of the tough challenges of ontology engineering and maintenance. Recent developments on the World Wide Web and IC intranets demonstrate that individual users are willing to supply structured information conforming to de facto standards. This can be most(More)
Manipulation of control points is a standard procedure in B-spline surface patch design. Unfortunately, this tool alone is not suucient to achieve certain goals such as removing gaps among patches. In this paper, we introduce another approach for removing gaps but maintaining the geometrical smoothness condition. The only requirement is to sacriice the true(More)
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