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ICDT
1999
ACM
82views Database» more  ICDT 1999»
15 years 1 months ago
The Data Warehouse of Newsgroups
Electronic newsgroups are one of the primary means for the dissemination, exchange and sharing of information. We argue that the current newsgroup model is unsatisfactory, especial...
Himanshu Gupta, Divesh Srivastava
85
Voted
KDD
1998
ACM
129views Data Mining» more  KDD 1998»
15 years 1 months ago
Data Reduction Based on Hyper Relations
Data reduction makes datasets smaller but preserves classication structures of interest. It is an important area of research in data mining and databases. In this paper we present...
Hui Wang, Ivo Düntsch, David A. Bell
IUI
1997
ACM
15 years 1 months ago
Helping Users Think in Three Dimensions: Steps Toward Incorporating Spatial Cognition in User Modelling
Historically, efforts at user modelling in educational systems have tended to employ knowledge representations in which symbolic (or "linguistic") cognition is emphasize...
Michael Eisenberg, Ann Nishioka, M. E. Schreiner
LATA
2010
Springer
15 years 1 months ago
Variable Automata over Infinite Alphabets
Automated reasoning about systems with infinite domains requires an extension of regular automata to infinite alphabets. Existing formalisms of such automata cope with the infinite...
Sarai Sheinvald, Orna Grumberg, Orna Kupferman
STOC
2010
ACM
269views Algorithms» more  STOC 2010»
15 years 1 months ago
Approximations for the Isoperimetric and Spectral Profile of Graphs and Related Parameters
The spectral profile of a graph is a natural generalization of the classical notion of its Rayleigh quotient. Roughly speaking, given a graph G, for each 0 < < 1, the spect...
Prasad Raghavendra, David Steurer and Prasad Tetal...