Hung V. Nguyen

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Keyword searching is the most common form of document search on the Web. Many Web publishers manually annotate the META tags and titles of their pages with frequently queried phrases in order to improve their placement and ranking. A " hidden phrase " is defined as a phrase that occurs in the META tag of a Web page but not in its body. In this paper we(More)
Most search engines do their text query and retrieval based on keyword phrases. However, publishers cannot anticipate all possible ways in which users search for the items in their documents. In fact, many times, there may be no direct keyword match between a search phrase and descriptions of items that are perfect " hits " for the search. We present a(More)
This research provides the results of testing common Krylov subspace linear iterative solvers and preconditioners in a parallel environment using the Portable, Extensible Toolkit for Scientific Computation (PETSc) software on extremely heterogeneous, unsaturated flow problems. A three-dimensional (3-D) model of a levee with a root zone embedded at the toe(More)
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