We describe a mechanism based on distributed Event-Condition-Action (ECA) rules that supports data coordination in a multidatabase setting. The proposed mechanism includes an ECA rule language and a rule execution engine that transforms rules when they are first posted, and then coordinates their execution. Like traditional ECA rules, our ECA rule language has three parts: an event language, a ...

This paper studies the performance and scalability aspects of processing Event-ConditionAction (ECA) rules on RDF metadata in peer-to-peer (P2P) environments. This work has been motivated by the increasing use of RDF in distributed web-based applications that require timely notification and propagation of metadata changes between peers, for which ECA rules are a possible candidate technology. W...

Current needs of E-Commerce transactions require the development of XML database system like relational database systems. Fuzzy concepts are adapted to the field of XML Databases (DB) in order to deal with ambiguous and uncertain data. Incorporating fuzziness into Event Condition Action (ECA) rules would improve the effectiveness of XML DB as it provides much flexibility in defining rules for t...

Context-aware application behaviors can be described as logic rules following the Event-Control-Action (ECA) pattern. In this pattern, an Event models an occurrence of interest (e.g., a change in context); Control specifies a condition that must hold prior to the execution of the action; and an Action represents the invocation of arbitrary services. We have defined a Controlling service aiming ...

Many complex distributed real-time applications, monitoring and controlling the external environment, require sophisticated processing and sharing of an extensive amount of data under critical timing constraints. In this paper, we present a comprehensive overview of the Data Distribution Service standard (DDS) and describe its QoS features for developing real-time applications. An overview abou...

Our concern is the behaviour of the elementary cellular automata with state set {0,1} over the cell set Z/nZ (one-dimensional finite wrap-around case), under all possible temporal rules (asynchronicity). Over the torus Z/nZ (n≤ 10),we will see that the ECA with Wolfram update rule 57 maps any v ∈ F2 to any w ∈ F2, varying the temporal rule. We furthermore show that all even (element of the alte...

RDF is one of the technologies proposed to realise the vision of the Semantic Web and it is being increasingly used in distributed webbased applications. The use of RDF in applications that require timely notification of metadata changes raises the need for mechanisms for monitoring and processing such changes. Event-Condition-Action (ECA) rules are a natural candidate to fulfill this need. In ...

We have designed a novel Event-Condition-Action (ECA) scheme based Ad hoc On-demand Distance Vector(ECA-AODV) routing protocol for a Ubiquitous Network (UbiNet). ECA-AODV is designed to make routing decision dynamically and quicker response to dynamic network conditions as and when event occur. ECA scheme essentially consists of three modules to make runtime routing decision quicker. First, eve...

We describe a mechanism based on distributed Event-ConditionAction (ECA) rules that supports data coordination in a multidatabase setting. The proposed mechanism includes an ECA rule language and a rule execution engine that transforms and partitions rules when they are first posted, and then coordinates their execution. The paper also presents a prototype implementation in a simulated environm...

Elementary cellular automaton (ECA) rules 9 and 74, members of Chua’s Bernoulli shift rules and Wolfram’s class 2, can generate a host of gliders and complicated glider collisions by introducing the hybrid mechanism. These gliders and collisions are more plentiful than those generated by ECA rule 110. This paper presents a discussion of the symbolic dynamics of the gliders in hybrid cellular au...