Extending OBDD graphs for composite event matching in content-based pub/sub systems

2005 ◽  
Author(s):  
Gang Xu ◽  
Wei Xu ◽  
Tao Huang
Keyword(s):  
Composite Event

Dagstuhl Seminar on the Foundations of Composite Event Recognition

2021 ◽  
Vol 49 (4) ◽  
pp. 24-27
Author(s):  
Alexander Artikis ◽  
Thomas Eiter ◽  
Alessandro Margara ◽  
Stijn Vansummeren
Keyword(s):  
Event Recognition ◽  
Event Data ◽  
Composite Event ◽  
Geographically Distributed

Composite event recognition (CER) is concerned with continuously matching patterns in streams of 'event' data over (geographically) distributed sources. This paper reports the results of the Dagstuhl Seminar "Foundations of Composite Event Recognition" held in 2020.

Composite Event Processing for Data Streams and Domain Knowledge

2011 ◽  
Vol 219-220 ◽  
pp. 927-931
Author(s):  
Jun Qiang Liu ◽  
Xiao Ling Guan
Keyword(s):  
Query Optimization ◽  
Data Streams ◽  
Domain Knowledge ◽  
Semantic Information ◽  
Query Language ◽  
Processing System ◽  
Optimization Techniques ◽  
Research Attention ◽  
Composite Event ◽  
Solid Foundation

In recent years the processing of composite event queries over data streams has attracted a lot of research attention. Traditional database techniques were not designed for stream processing system. Furthermore, example continuous queries are often formulated in declarative query language without specifying the semantics. To overcome these deficiencies, this article presents the design, implementation, and evaluation of a system that executes data streams with semantic information. Then, a set of optimization techniques are proposed for handling query. So, our approach not only makes it possible to express queries with a sound semantics, but also provides a solid foundation for query optimization. Experiment results show that our approach is effective and efficient for data streams and domain knowledge.

Composite Event

2009 ◽  
pp. 418-419
Author(s):  
AnnMarie Ericsson ◽  
Mikael Berndtsson ◽  
Jonas Mellin
Keyword(s):  
Composite Event

Electrical Activity in the Hydroid Cordylophora

1968 ◽  
Vol 49 (2) ◽  
pp. 387-400
Author(s):  
G. O. MACKIE
Keyword(s):  
Electrical Stimulation ◽  
Electrical Activity ◽  
Pulse Time ◽  
Apparent Effect ◽  
Muscle Response ◽  
Composite Event ◽  
Slow Pulse

1. Cordylophora has two major hydranth pacemaker systems, one producing slow,, biphasic pulses at 2.0-4.0 sec. intervals (slow pulse or SP system) and one exhibiting sharp, predominantly negative potentials singly or in bursts with a normal interval of 1.5-2.0 sec. between pulses (fast pulses, FPs). 2. Both SPs and FPs are recorded throughout the hydranth, but do not spread to and are not co-ordinated in adjacent hydranths. 3. SPs could not consistently be evoked artificially and showed no clear behavioural correlates. FPs occur during feeding and following electrical stimulation, where they may accompany a muscle response. 4. FPs appear superimposed on SPs when both systems are active. Such a composite event advances the SP rhythm by an amount close to the normal FP inter-pulse time, but compensatory adjustment of the SP rhythm then occurs. 5. Treatment with 10-5 g./ml. tetrodotoxin has no apparent effect on Cordylophora.

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