Results 221 to 230 of about 57,558 (262)
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Motor Functioning and Alcohol Dependence
Alcoholism: Clinical and Experimental Research, 2007Background: Autopsy and neuroimaging research in stably abstinent alcoholics illuminated structural and functional abnormalities in brain areas that organize and coordinate motor functioning. Researchers that used behavioural tasks to measure motor functioning found that abstinent alcoholics perform worse than healthy controls.
de Wilde, Bieke +3 more
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Functional Dependencies for XML
2003In this paper we address the problem of how to extend the definition of functional dependencies (FDs) in incomplete relations to XML documents. An incomplete relation is said to strongly satisfy a FD if every completion of the relation, obtained by replacing all null values by data values, satisfies the FD in the ordinary sense.
Millist W. Vincent, Jixue Liu
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Functional Dependencies for XML
2010In this paper, we present a new approach for defining functional dependencies for XML (XFDs) on XML Schema. While showing how to extend XML Schema, we analyze the expressive power of our XFDs. We focus on supporting complex value (e.g. list, set) in our proposal.
Haitao Chen, Husheng Liao, Zengqi Gao
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ACM Transactions on Information Systems, 2009
PageRank is defined as the stationary state of a Markov chain. The chain is obtained by perturbing the transition matrix induced by a web graph with a damping factor α that spreads uniformly part of the rank. The choice of α is eminently empirical, and in most cases the original suggestion α=0.85 by Brin and Page is still used. In this paper, we give a
P. Boldi, M. Santini, S. Vigna
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PageRank is defined as the stationary state of a Markov chain. The chain is obtained by perturbing the transition matrix induced by a web graph with a damping factor α that spreads uniformly part of the rank. The choice of α is eminently empirical, and in most cases the original suggestion α=0.85 by Brin and Page is still used. In this paper, we give a
P. Boldi, M. Santini, S. Vigna
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Dependability and Functional Safety
2012The chapter deals with the dependability and the functional safety of a system by illustrating the key points of the theoretical corpuses formulated on the two subjects: the dependability theory and the functional safety standards. Dependability is concerned with the ability of a system to deliver the intended service, including the ability to cope ...
BUJA, GIUSEPPE, MENIS, ROBERTO
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Error-Robust Functional Dependencies
Fundamenta Informaticae, 2004A database user may be confronted with a relation that contains errors. These errors may result from transmission through a noisy channel, or they may have been added deliberately in order to hide or spoil information. Error-robust functional dependencies provide dependencies that still hold in the case of errors.
Sven Hartmann +3 more
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Testing satisfaction of functional dependencies
Journal of the ACM, 1982Determmmg whether a single relation satisfies a set of funcnonal dependencies is a straightfor- ward task However, determining whether a set of relations sattsfies a set of functional dependencies is a more d~fficult problem Even the meaning of th~s notion of "satisfaction" needs to be settled Several definitions for sat~sfactton are considered, one of
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Functional Dependencies between Variables
Studia Logica, 2000zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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The interaction between functional dependencies and template dependencies
Proceedings of the 1980 ACM SIGMOD international conference on Management of data - SIGMOD '80, 1980A large class of dependencies, called template dependencies, was introduced in Sadri and Ullman [1979], and a complete set of inference rules (axioms) was given for it. In this paper, we investigate the interaction between template dependencies and functional dependencies.
Fereidoon Sadri, Jeffrey D. Ullman
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On approximation measures for functional dependencies
Information Systems, 2004We examine the issue of how to measure the degree to which a functional dependency (FD) is approximate. The primary motivation lies in the fact that approximate FDs represent potentially interesting patterns existent in a table. Their discovery is a valuable data mining problem.
Chris Giannella, Edward L. Robertson
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