There are now robust technical solutions to interoperate geographic information in a syntactic and schematic sense. But, problem with different meaning of geo-data from distributed geo-information sources still exists. The use of ontologies in semantic translation is a viable approach to overcome the problem of semantic heterogeneity. Also, from the technological point of view, mediator-based s...

With the advent of XML as the standard for data representation and exchange over Internet, there are ever increasing applications, E-Commerce application in particular, using XML as a mediator model. It raises the issue on how to evaluate XML queries efficiently in mediator systems. In this article, we address the problem of multiple query optimization in a XML based mediator. Because the XML q...

In a multi-agent system, action selection is important for the cooperation and coordination among agents. As the environment is dynamic and complex, modular Q-learning, which is one of the reinforcement learning schemes, is employed in assigning a proper action to an agent in the multi-agent system. The architecture of modular Q-learning consists of learning modules and a mediator module. The m...

Transcription is one of the key biological functions of the cell. A tight regulation of this process is extremely important for cell physiology. It is now generally accepted that a large protein complex, the Mediator of transcription regulation, is essential for eukaryotic transcription by RNA polymerase II (Pol II) in response to transcription activators. Unsurprisingly, Mediator has been impl...

This paper presents a simple interactive negotiation approach for conflicts in everyday life with incomplete information. We focus on mediation to obtain an agreement while going through alternating offers over a finite time bargaining game. The mediator searches and proposes a jointly optimal negotiation text for all players participating in the negotiation process based on their conditional p...

In literature, the mediator architecture has been proposed for taking information from distributed, heterogeneous, and often dynamic sources and making them work together as a whole. In this paper we propose a distributed case-based approach for the main problem of a mediator, i.e. rewriting queries according to mediator’s schema. According to this approach we use a case memory as mediator’s sc...

Mediator is a conserved, essential transcriptional coactivator complex, but its in vivo functions have remained unclear due to conflicting data regarding its genome-wide binding pattern obtained by genome-wide ChIP Here, we used ChEC-seq, a method orthogonal to ChIP, to generate a high-resolution map of Mediator binding to the yeast genome. We find that Mediator associates with upstream activat...

Database federation is one approach to data integration, in which a middleware, called mediator, provides uniform access to a number of heterogeneous data sources. For the mediator, two key components are query rewriter and query optimizer. In this thesis, we focus on the query optimizer part, particularly, on cost-based query optimization for distributed joins over database federation. One imp...

today export considered as important indicators in the global development companies and countries, and given the export orientation and competitive advantage is important to increase export performance. in the present paper, the aim of this study is considering the potential impact of market orientation and competitive advantage of exporters on export performance. population considered for this...