Today we are faced with a huge variety of multimedia and collaborative applications, networks and end-systems. The resulting heterogeneous environment impose new challenges on transport systems. To meet the requirements of heterogeneous receivers in mulit-point communication a communication framework based on a so called Group Mediator is outlined. Group Mediators are located within the network...

This paper presents a generic model for document-based mediated resource negotiation. Document-based due to the use of Web Service Agreements. The information types included in the Web Service Agreement structure have been extended to include the accept phase of negotiation. This model of mediated negotiation respects the autonomy of both individual provider agents and consumer agents: consumer...

The exploration of social networks is essential to find capable collaborators who can help problem-solving and to augment cooperation between users. This paper describes an agent based social networking system called PeCo-Mediator-II for seeking for a collaborator with the chain of personal connections (PeCo) in distributed organizations. This system helps gathering, exploring, and visualizing ...

This paper describes an algorithm for reformulation of XQuery queries. The mediation is based on an essential component called mediator. The main role of the mediator is to reformulate a user query, written in terms of global schema, in queries written in terms of sources schemas. Our algorithm is based on the principle of logical equivalence, simple and complex unification, to obtain a better ...

Mediation analysis is used to review the comparative change in the amount of strength of association of the primary predictor with the outcome after adjustment for the mediator. Mediation models are very widely used in social sciences and biomedical sciences. Before conducting mediation studies, researchers want to know the sample size (i.e. number of subjects) required for achieving the adequa...

Mediator is a transcriptional co-activator recruited to enhancers by DNA-binding activators, and it also interacts with RNA polymerase (Pol) II as part of the preinitiation complex (PIC). We demonstrate that a single Mediator complex associates with the enhancer and core promoter in vivo, indicating that it can physically bridge these transcriptional elements. However, the Mediator kinase modul...

An open distributed environment can be perceived as a service market where services are freely ooered and requested. Any infrastructure which seeks to provide appropriate mechanisms for such environments has to include some mediator functionality to bring together matching service requests and service ooers. The matching algorithm that the mediator must perform commonly builds upon an IDL{based...

At present, the mediator/wrapper integration methods are widely used in ontology based data integration because they solve the data update problems of data warehouse method. The key of this method is building of mapping from the global ontology in mediator to the local ontology in wrapper. This article analyzes the general mapping methods and designs a SPARQL query driven Global Local as View (...