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JAIR
2007
87views more  JAIR 2007»
13 years 4 months ago
Supporting Temporal Reasoning by Mapping Calendar Expressions to Minimal Periodic Sets
In the recent years several research efforts have focused on the concept of time granularity and its applications. A first stream of research investigated the mathematical model...
Claudio Bettini, Sergio Mascetti, Xiaoyang Sean Wa...
SIGMOD
2010
ACM
281views Database» more  SIGMOD 2010»
13 years 9 months ago
Continuous sampling for online aggregation over multiple queries
In this paper, we propose an online aggregation system called COSMOS (Continuous Sampling for Multiple queries in an Online aggregation System), to process multiple aggregate quer...
Sai Wu, Beng Chin Ooi, Kian-Lee Tan
ETT
2002
128views Education» more  ETT 2002»
13 years 4 months ago
Geographical and temporal characteristics of inter-POP flows: View from a single pop
In this paper, we study traffic demands in an IP bacbkone, identify the routes used by these demands, and evaluate traffic granularity levels that are attractive for improving the...
Supratik Bhattacharyya, Christophe Diot, Nina Taft...
IPPS
2003
IEEE
13 years 10 months ago
Leveraging Block Decisions and Aggregation in the ShareStreams QoS Architecture
ShareStreams (Scalable Hardware Architectures for Stream Schedulers) is a canonical architecture for realizing a range of scheduling disciplines. This paper discusses the design c...
Raj Krishnamurthy, Sudhakar Yalamanchili, Karsten ...
ICDE
2005
IEEE
108views Database» more  ICDE 2005»
14 years 6 months ago
Range Efficient Computation of F0 over Massive Data Streams
Efficient one-pass computation of F0, the number of distinct elements in a data stream, is a fundamental problem arising in various contexts in databases and networking. We consid...
Pavan Aduri, Srikanta Tirthapura