Joshua Powers

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The most controversial fishery in U.S. waters of the Gulf of Mexico (Gulf) is for northern red snapper Lutjanus campechanus, which collapsed in the late 1980s when stock biomass became too low to be fished commercially in the eastern Gulf. Red snapper management began in 1989; the stock is now showing signs of recovery. The Gulf of Mexico Fishery Management(More)
We describe a large-scale experiment in which non-artificial intelligence subject matter experts (SMEs)—with neither artificial intelligence background nor extensive training in the task—author knowledge bases (KBs) following a challenge problem specification with a strong question-answering component. As a reference for comparison, professional knowledge(More)
Semantic technology powered access control schemes have been recently proposed to enhance the flexibility of role-based access control (RBAC) and its variants. These access control mechanisms depend heavily on rich, contextual data sourced from an identity attribute store. Unfortunately, most identity stores in use today use the Lightweight Directory Access(More)
Rich lexica such as WordNet are valuable resources for information extraction from unstructured text. When extraction techniques have formal ontologies as their targets, a mapping from the lexicon to the ontology has been shown to be beneficial in sense disambiguation and usability of the extracted knowledge. Such mappings are generally established(More)