One of the high interesting areas in the distributed systems is the problem of building and running pervasive computing services for mobile users. The central point for building such a services is to appropriately model the physical and data environment. In this paper we concentrate on the data part of such an environment that would enable creating a general scheme for a category of flexible se...

The implementation of multiple Grid computing portals has led us to develop a methodology for Grid portal development that facilitates rapid prototyping and building of portals. Based on the NPACI Grid Portal Toolkit (GridPort) and the NPACI HotPage, all portals inherit interactive Grid services, share a single account and login environment, and share the infrastructure required to support and ...

The advancement of wireless networks and mobile computing necessitates more advanced applications and services to be built with context-awareness enabled and adaptability to their changing contexts. Today, building context-aware services is a complex task due to the lack of an adequate infrastructure support in pervasive computing environments. In this article, we propose a ServiceOriented Cont...

Tourism organizations have become one of the main users of the internet in recent years bysetting their own urban tourism websites. However, not all the websites are effective to promote their goals andobjectives. An effective evaluation of urban tourism websites can help organizations on how best to employ them.Using the ICTRT (Information, Communication, Transaction, Relationship and Technica...

There has been considerable interest in reliability services such as Google‟s Chubby and Yahoo‟s Zookeeper, and in the State Machine Replication model, the standard way of formalizing them. Yet, traditional SMR treatments omit a formal analysis of reconfiguration as actually implemented in production settings. We develop such a model; it ensures that members of the new configuration start with ...

Currently, there are hardly any indoor navigation services utilizing Linked Data, and there is also a lack of available vocabularies or ontologies for the description of building plans. This paper presents the iLOC ontology as a generic approach for in-house wayfinding and location description. The suggested Linked Data model enables the integration of various datasets related to buildings and ...

Most bio text-mining efforts so far have focused on identification of biological, molecular and chemical entities from the literature to support knowledge acquisition and discovery in the life sciences. There are also a growing number of bioinformatics services and tools available. This raises the challenging problem of semi-automated annotation, documentation and discovery of services suitable...

A number of technology and workload trends motivate us to consider the appropriate resource allocation mechanisms and policies for streaming media services in shared cluster environments. We present MediaGuard – a model-based infrastructure for building streaming media services – that can efficiently determine the fraction of server resources required to support a particular client request over...

With the development of web services, more effective trust building mechanisms are needed to deploy diverse trust models in a web services environment. The lack of mechanisms that can dynamically build trust relationships while preserving privacy impedes progress. Current web service technologies encourage a client to reveal all its private attributes in a pre-packaged digital credential to the...