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ICDE
1998
IEEE
70views Database» more  ICDE 1998»
14 years 10 months ago
Point-Versus Interval-Based Temporal Data Models
The association of timestamps with various data items such as tuples or attribute values is fundamental to the management of time-varying information. Using intervals in timestamp...
Michael H. Böhlen, Renato Busatto, Christian ...
EDBT
2010
ACM
147views Database» more  EDBT 2010»
14 years 3 months ago
A simple (yet powerful) algebra for pervasive environments
Querying non-conventional data is recognized as a major issue in new environments and applications such as those occurring in pervasive computing. A key issue is the ability to qu...
Yann Gripay, Frédérique Laforest, Je...
INFOCOM
2008
IEEE
14 years 3 months ago
On Data-Centric Trust Establishment in Ephemeral Ad Hoc Networks
—We argue that the traditional notion of trust as a relation among entities, while useful, becomes insufficient for emerging data-centric mobile ad hoc networks. In these system...
Maxim Raya, Panagiotis Papadimitratos, Virgil D. G...
ACSC
2007
IEEE
14 years 3 months ago
On Inferences of Full Hierarchical Dependencies
Full hierarchical dependencies (FHDs) constitute a large class of relational dependencies. A relation exhibits an FHD precisely when it can be decomposed into at least two of its ...
Sven Hartmann, Sebastian Link
ICFCA
2005
Springer
14 years 2 months ago
On Computing the Minimal Generator Family for Concept Lattices and Icebergs
Minimal generators (or mingen) constitute a remarkable part of the closure space landscape since they are the antipodes of the closures, i.e., minimal sets in the underlying equiva...
Kamal Nehmé, Petko Valtchev, Mohamed Rouane...