Hyeonsung Cho

Effective semantic Web services discovery using usability

As Web resources and information are becoming numerous, many researchers have studied automated processing of the resources and information. In addition, semantic Web services make the Web services represented to be machine-interpretable through the semantic Web. Semantic Web services discovery systems, such as matchmaker, find proper semantic Web services for a client. However, it is mainly focused on semantic similarities between description instances and requests containing single input and output. In our design, annexed algorithm improves matching algorithm to arrange the result advertisements according to the clients conveniences for executing the Web services; less re-scheduling, less meaningless data. It also offers effective discovery services especially for the request with multiple inputs and outputs and in condition that there are no perfectly matched Web services or available Web services. Moreover, we implement the matching engine in URCSD (semantic Web services discovery for URC) for an intelligent agent, such as URC (ubiquitous robotic companion), through the proposed algorithm. Therefore, we expect the system provides effective discovery services for network based robotics and intelligent agents

Improved matching algorithm for services described by OWL-S

The ability to located appropriate services is becoming more important. Current service retrieval technology, however, uses small parts of service capabilities. CMU algorithm, for example, finds services using only hierarchical relationships. This paper describes several capabilities which can be used to locate most appropriate services, uses them, and finally proposes an improved matching algorithm for locating useful services described by OWL-S

Recovery policies on a Web services-based business process for minimizing human intervention

Web services enables application developers to implement a new application by composing several Web Services. As the recovery mechanisms of Web services composition specifications are insufficient for automatic recovery of system faults, we propose recovery policies for the fault handling of Web services-based business processes. The suggested recovery policies enable the business process execution system to automatically recover the business process from a system fault. As being determined at design time, the recovery polices brings about the reduction of recovery time at run time. In addition, the recovery policies prohibit unexpected side effects resulted from wrong recovery behavior determined at run time

Visualizing and authoring owl OWL in ezOWL

Knowledge modeling with Web ontology language (OWL) is very complicated because OWL is not for human, but for machine. To effectively describe an ontology represented in OWL, we present a novel visualizing and authoring interface in ezOWL. ezOWL is a visual OWL editor that can intuitively construct an ontology. In this paper, we show how to visualize and author ontology intuitively with diagram-based visualizing and authoring techniques