Current Issue : April - June Volume : 2012 Issue Number : 2 Articles : 4 Articles
As a greater number ofWeb Services are made available today, automatic discovery is recognized as an important task. To promote\r\nthe automation of service discovery, different semantic languages have been created that allow describing the functionality of\r\nservices in a machine interpretable form using Semantic Web technologies. The problem is that users do not have intimate\r\nknowledge about semantic Web service languages and related toolkits. In this paper, we propose a discovery framework that\r\nenables semanticWeb service discovery based on keywords written in natural language.We describe a novel approach for automatic\r\ndiscovery of semantic Web services which employs Natural Language Processing techniques to match a user request, expressed in\r\nnatural language, with a semantic Web service description. Additionally, we present an efficient semantic matching technique to\r\ncompute the semantic distance between ontological concepts....
A computer application designed to generalize linear elements in a vector formatted cartographic set by means of two of the most contrasted line generalization algorithms, Douglas-Peucker simplification and B�©zier curves based smoothing, is presented in this paper. Regarding codification, the simultaneous treatment of different lineal geometry entity classes and the conservation of their original topological relationships among them are considered. It is recommended in processes that produce small scale reductions (in a 1:2 relationship or similar). The application allows changing the characteristic parameters of the referred algorithms and proposes a report of the results obtained after every transformation. That way it supplies an additional facility as a trial tool to choose the parameters that give the best results in every process....
The Session Initiation Protocol (SIP) is a multimedia signalling protocol that has evolved into a widely adopted communication\r\nstandard. The integration of SIP into existing IP networks has fostered IP networks becoming a convergence platformfor both realtime\r\nand non-real-time multimedia communications. This converged platform integrates data, voice, video, presence, messaging,\r\nand conference services into a single network that offers new communication experiences for users. The open source community\r\nhas contributed to SIP adoption through the development of open source software for both SIP clients and servers. In this paper, we\r\nprovide a survey on open SIP systems that can be built using publically available software.We identify SIP features for service development\r\nand programming, services and applications of a SIP-converged platform, and the most important technologies supporting\r\nSIP functionalities.We propose an advanced converged IP communication platformthat uses SIP for service delivery. The platformsupports\r\naudio and video calls, along with media services such as audio conferences, voicemail, presence, and instant messaging.\r\nUsing SIP Application Programming Interfaces (APIs), the platform allows the deployment of advanced integrated services.\r\nThe platformis implemented with open source software. Architecture components run on standardized hardware with no need for\r\nspecial purpose investments....
We live in an era of ever-increasing abundance of data. To cope with the information overload we suffer from every single day,\r\nmore sophisticated methods are required to access, manipulate, and analyze these humongous amounts of data. By embracing\r\nthe heterogeneity, which is unavoidable at such a scale, and accepting the fact that the data quality and meaning are fuzzy, more\r\nadaptable, flexible, and extensible systems can be built. RESTful services combined with Semantic Web technologies could prove\r\nto be a viable path to achieve that. Their combination allows data integration on an unprecedented scale and solves some of the\r\nproblems Web developers are continuously struggling with. This paper introduces a novel approach to create machine-readable\r\ndescriptions for RESTful services as a first step towards this ambitious goal. It also shows how these descriptions along with an\r\nalgorithm to translate SPARQL queries to HTTP requests can be used to integrate RESTful services into a global read-write Web\r\nof Data....
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