Learn More
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)
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)
BACKGROUND White matter (WM) integrity declines with normal aging. Physical activity may attenuate age-related WM integrity changes and improve cognitive function. This study examined brain WM integrity in Masters athletes who have engaged in life-long aerobic exercise training. We tested the hypothesis that life-long aerobic training is associated with(More)
Confidence annotation allows a spoken dialog system to accurately assess the likelihood of misunderstanding at the utterance level and to avoid breakdowns in interaction. We describe experiments that assess the utility of features from the decoder, parser and dialog levels of processing. We also investigate the effectiveness of various classifiers,(More)
— In this paper, we propose a novel superposition coding aided multiplexed Hybrid Automatic Repeat reQuest (HARQ) scheme for the sake of improving both the link-layer and Transport Control Protocol (TCP) layer efficiency. The detailed system design is presented and the transmission efficiency metrics of both layers are discussed. Furthermore, the achievable(More)