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IDEAS
1998
IEEE
84views Database» more  IDEAS 1998»
15 years 11 months ago
A Transaction Model for Mobile Computing
In this paper, we introduce a prewrite operation before a write operation in a mobile transaction to improve data availability. A prewrite operation does not update the state of a...
Sanjay Kumar Madria, Bharat K. Bhargava
PODS
1993
ACM
122views Database» more  PODS 1993»
15 years 10 months ago
Towards an Analysis of Range Query Performance in Spatial Data Structures
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...
Bernd-Uwe Pagel, Hans-Werner Six, Heinrich Toben, ...
VLDB
1990
ACM
166views Database» more  VLDB 1990»
15 years 10 months ago
The Tree Quorum Protocol: An Efficient Approach for Managing Replicated Data
In this paper, we present an efficient algorithm for managing replicated data. We impose a logical tree structure on the set of copies of an object. In a failurefree environment t...
Divyakant Agrawal, Amr El Abbadi
SPIESR
2003
129views Database» more  SPIESR 2003»
15 years 8 months ago
Visual interfaces for a semantic content-based image retrieval system
In an earlier study a Semantic Content Based Image Retrieval system was developed. The system requires a Visual Object Process Diagram - VOPD to be created for each image in the d...
Hagit Zabrodsky Hel-Or, Dov Dori
SIGMOD
2008
ACM
119views Database» more  SIGMOD 2008»
16 years 6 months ago
Report on the Principles of Provenance Workshop
Provenance, or records of the origin, context, custody, derivation or other historical information about a (digital) object, has recently become an important research topic in a n...
James Cheney, Peter Buneman, Bertram Ludäscher