13902534
Towards evolving Web sites into grid services environment
Grid services are emerged by integrating grid computing and Web services to perform a seamless information processing system across distributed, heterogeneous, dynamic virtual organisations that the user can access from any location. The Web Service Resource Framework (WSRF) was announced as a new way for manipulating "stateful resources" to perform grid services. It defines the concept of "stateful resources" and how they can be discovered, queried and manipulated via Web services. In this paper, we proposed a grid services-oriented reengineering approach to create stateful resources from conventional HTML Web sites, which applies hierarchical cluster and wrapper techniques to extract and translate Web sites resources. It supports services identification and packaging and archives Web site evolution into grid services environment by exploiting WRSF.
468496
Incorporating Legacy System into Semantic Grid Framework
The semantic grid is an extension of the current grid. Resources description framework (RDF) can be used to extend the current grid into semantic grid in which information and services are given well-defined meaning. This paper proposed an approach to recognizing the reusable components from the legacy system and representing these components by using XML and RDF, which could be performed for incorporating legacy system components into the semantic grid framework
338997
A new Mallows distance based metric for comparing clusterings
Despite of the large number of algorithms developed for clustering, the study on comparing clustering results is limited. In this paper, we propose a measure for comparing clustering results to tackle two issues insufficiently addressed or even overlooked by existing methods: (a) taking into account the distance between cluster representatives when assessing the similarity of clustering results; (b) constructing a unified framework for defining a distance based on either hard or soft clustering and ensuring the triangle inequality under the definition. Our measure is derived from a complete and globally optimal matching between clusters in two clustering results. It is shown that the distance is an instance of the Mallows distance---a metric between probability distributions in statistics. As a result, the defined distance inherits desirable properties from the Mallows distance. Experiments show that our clustering distance measure successfully handles cases difficult for other measures.
45162569
Bioinformatics Web Services
Web services is distributed computing technology that provides software services over the Web. The Cyberinfrastructure Group at the Virginia Bioinformatics Institute (VBI) has adopted the Web service architecture and wrapped a wide variety of bioinformatics applications and data resources using the technology. Users can browse various data resources and invoke analysis tools through the services deployed at VBI. We have also developed an integrated client environment, ToolBus, which is available from http://pathport.vbi.vt.edu/download. A use case is given to demonstrate the use of Web services through ToolBus. A complete list of Web services is included.
17329568
WSIP - Web service SIP endpoint for converged multimedia/multimodal communication over IP
We present an approach for converged communication services over IP, based on the concept of WSIP (Web service SIP). In our approach, each WSIP node is both a SIP endpoint that communicates in the SIP world through SIP signaling, and a Web service SOAP node that provides a native and generic service integration environment for binding SIP based communication in Web services. The unification of SIP with Web service provides a new converged communication paradigm. It allows dynamic service discovery and binding that integrate SIP as a component in the business transaction. The clear separation of service integration environment and SIP signaling in our approach maintains the simplicity and efficiency of the existing SIP protocol, while leverages the power of both methods in IP based communication services. The ubiquitous service integration nature of Web service provides a disciplined solution to maintain and update large number of SIP endpoints from different installation bases. It enables dynamic monitoring, repairing, and updating SIP UA endpoints, which is essential to the success of VoIP using SIP. The proposed approach was implemented in a prototype research system, and several advantages of WSIP over the existing approaches are observed.
11869668
Joint image compression and classification with vector quantization and a two dimensional hidden Markov model
We present an algorithm to achieve good compression and classification for images using vector quantization and a two dimensional hidden Markov model. The feature vectors of image blocks are assumed to be generated by a two dimensional hidden Markov model. We first estimate the parameters of the model, then design a vector quantizer to minimize a weighted sum of compression distortion and classification risk, the latter being defined as the negative of the maximum log likelihood of states and feature vectors. The algorithm is tested on both synthetic data and real image data. The extension to joint progressive compression and classification is discussed.
5583846
Parallel computing of a quasi-Monte Carlo algorithm for valuing derivatives
Abstract The performance of the standard Monte Carlo method is compared with the performance obtained through the use of ( t , m , s )-nets in base b in the approximation of several high dimensional integral problems in valuing derivatives and other securities. The ( t , m , s )-nets are generated by a parallel algorithm, where particular considerations are given to scalability of dynamic adaptive routing and load balancing in the design and implementation of the algorithm. From the numerical evidence it appears that such nets can be powerful tools for valuing such securities.