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Multi-dimensional data indexing has received much attention in a centralized database. However, not so much work has been done on this topic in the context of Peer-to-Peer systems. In this paper, we propose a new Peer-to-Peer framework based on a balanced tree structure overlay, which can support extensible centralized mapping methods and query processing(More)
This paper describes the development of a word-level confidence metric suitable for use in a dialog system. Two aspects of the problems are investigated: the identification of useful features and the selection of an effective classifier. We find that two parse-level features, Parsing-Mode and Slot-Backoff-Mode, provide annotation accuracy comparable to that(More)
  • Thomas L Delworth, John A Beesley, William F Cooke, Keith W Dixon, C T Gordon, Stephen M Griffies +7 others
  • 2004
The formulation and simulation characteristics of two new global coupled climate models developed at NOAA's Geophysical Fluid Dynamics Laboratory (GFDL) are described. The models were designed to simulate atmospheric and oceanic climate and variability from the diurnal time scale through multicentury climate change, given our computational constraints. In(More)
Peer-to-Peer systems have recently become a popular means to share resources. Effective search is a critical requirement in such systems, and a number of distributed search structures have been proposed in the literature. Most of these structures provide "log time search" capability, where the logarithm is taken base 2. That is, in a system with <i>N</i>(More)
  • Rong Zhang, Julie H Zuckerman, Kenichi Iwasaki, Thad E Wilson, Craig G Crandall, Benjamin D Levine
  • 2002
BACKGROUND The purpose of the present study was to determine the role of autonomic neural control of dynamic cerebral autoregulation in humans. METHODS AND RESULTS We measured arterial pressure and cerebral blood flow (CBF) velocity in 12 healthy subjects (aged 29+/-6 years) before and after ganglion blockade with trimethaphan. CBF velocity was measured(More)
In this study, a mechanism is demonstrated whereby a large reduction in the Atlantic thermohaline circulation (THC) can induce global-scale changes in the Tropics that are consistent with paleoevidence of the global synchronization of millennial-scale abrupt climate change. Using GFDL's newly developed global coupled ocean–atmosphere model (CM2.0), the(More)