Information integration has gained new importance since the widespread success of the World Wide Web. The simplicity of data publishing on the web and the promises of the emerging eCommerce markets pose a strong incentive for data providers to offer their services on the Internet. Due to the exponential growth rate of the number of web sites, users are already faced with an overwhelming amount ...

The integration of heterogenous web sources is still a big challenge. One approach to deal with integration problems is the usage of domain knowledge in form of vocabularies or ontologies during the integration (mapping of source data) as well as during query processing. However, such an ontology-based mediator system still have to overcome performance issues because of high communication costs...

We propose a framework that supports a federated environment based on a Mediator Architecture in the Semantic Web. The Mediator supports mappings between the OWL Ontology of the Mediator and the other ontologies in the federated sites. SPARQL queries submitted to the Mediator are decomposed and reformulated to SPARQL queries to the federated sites. The evaluated results return to the Mediator. ...

In this paper the authors propose and describe a Resource Description Framework (RDF)-based mediator designed to solve the health data interoperability problem that exists among heterogeneous health information systems (e.g., Electronic Health Records). The RDF-based mediator framework has three main components: (1) the Synonym Dictionary (SD) that can be used to map metadata semantics, (2) the...

OBJECTIVES In observational studies, epidemiologists often attempt to estimate the total effect of an exposure on an outcome of interest. However, when the underlying diagram is unknown and limited knowledge is available, dissecting bias performances is essential to estimating the total effect of an exposure on an outcome when mistakenly adjusting for mediators under logistic regression. Throug...

Mediator complexes (MED) link transcriptional regulators to RNA polymerase II. Here, we summarize the latest advances on the functional organization of yeast Mediator. We argue for the existence of a "universal" Mediator structurally conserved from yeast to man, based on an extensive analysis of sequence databases. Finally, we examine the implications of these observations for the physiological...

nowadays with high competition in area of business, companies have to use different strategies in order to face and control this competition. without doubt not only use of these strategies influences on packaging but also this issue affect on companies’ performance. hence, aim of this research is to study differentiation strategy of porter as a competitive strategy on organizational performance...

The previous studies about the maintenance systems were dealt with defining the evaluation criteria, grouping them, and using different techniques for evaluating. The main problem is that maintenance subsystems and the relationship between and within them in order to a reliable evaluation have never been identified before.The contribution of this study is realizing the four maintenance su...