Yang-Seung Jeon

Persistent storage system for efficient management of OWL web ontology

This paper proposes a new persistent storage to efficiently manage OWL Web ontologies. The Semantic Web is recognized as a next direction for progress of the current Web. To realize the Semantic Web, various technologies have been developed. Especially, OWL (Web Ontology Language) is the most important and state-of-the-art technology toward the ideal Semantic Web. However, most of research is being focused on designing and building OWL documents (OWL Ontology). One of the most important issues is how to efficiently and persistently store a very large OWL data into database management systems. In this paper, we propose a persistent storage system to achieve the purpose. This paper describes the performance evaluation result on the load time. The experiment result explicitly shows that our proposal provides more enhanced performance comparing with the existing systems.

Ontology-based composition of web services for ubiquitous computing

Current Web service environment provide connection to individual services but is still deficient in semantic processing technology for the interoperability of Web services. The semantic processing of Web services is a key technology for the dynamic discovery and composition of Web services. Thus, the present study established Web service ontology to support ubiquitous environment and proposed a method of describing Web services in consideration of their functional and semantic aspects. In addition, it implemented a service interlocking and composition system by including a mediator function, which enables the composition of heterogeneous Web services, in the system.

A novel memory-oriented OWL storage system

A novel memory-oriented OWL storage system is proposed. Semantic Web is recognized as the next generation Web and OWL (Web Ontology Language) is one of the most important technologies to achieve the Semantic Web. Even though several memory-oriented storage systems have been proposed to manage and handle OWL documents, they still suffer from low performance. In this paper, we propose a new memory-based OWL storage system to resolve the problem. This paper describes the proposed storage model and shows the experiment and comparison result. The evaluation result shows our storage system provides higher performance than other systems. Therefore, it enables us to develop and provides high quality Semantic Web services.

Hierarchical and dynamic information management framework on grid computing

This paper presents a GridIMF framework that provides support for adaptive grid services in response to the change of resource supplies and demands in a dynamic computing environment. The framework features a 3-tier hierarchical resource management structure. At the top is a global information manager that serves as a service broker between resource requesters and providers. Resource providers form virtual organizations, each of which is controlled by a local resource manager. The resource managers schedule the execution of tasks adaptively for efficiency and fault tolerance according to the dynamic resource availability information. The framework provides a common API through an application proxy. The proxy decouples grid applications from the implementation details of the framework

PSM approach to Web service composition

In this paper we describe a PSM based initiative towards the dynamic composition of Web services, which is achieved by assembling independently deployed components, pluggable in any context that requires its functionality. The ideas used in our approach based on the Unified-Solving Method development Language (UPML), and CBSE research, adapting and extending them to meet the requirements of component composition. The PSM-based composition count with three main features that distinguish our approach from other works in the field. First, it uses a zero-modification composition policy, which enables the construction of application systems out of existing components independently developed in various domains, without any modification of components. Second, it uses a composition mechanism based on mediators and pipe structures. Mediators allow overcoming compositional mismatches without modifying the code of components, preserving its black box and reusability features. Pipes supply a unified pathway that communicates components or mediators with each other transporting the effects of services. Finally, it makes use of a simple Composition Description Language (CDL), which is intended as a mechanism to depict the internal connection between components representing its physical links. The main functionalities of PSM-based composition are illustrated by means of a scenario involving a book price currency conversion

MARCXTM: topic maps modeling of MARC bibliographic information

MARC has played an important role as the standard for the description of bibliographic information for a long time. This paper describes a Topic Maps-based bibliographic framework which is compatible with MARC21 formats and the same expressive power as metadata. The MARC record formats are modeled with aggregation relationships. This paper describes the implementation of this model into MARCXTM. MARCXTM consists of two modules: the implementation of MARC21 specification and the representation of real MARC record data. MARCXTM shows how to realize a compatible framework with MARC21 at the level of metadata within the current information technology environment.

Personalized u-portal system with ontology and web services

Most portal systems provide simple web services in existing web environment but cannot support semantic web environment. Moreover, current portal systems are not adequate to compose personalized services. We also need semantic portlet search methods using portlet ontology, which can support ubiquitous environment, as well as portlet API that supports users’ access to u-Portals through various types of terminal equipment. This paper constructs a user-centered customized web service u-portal system that supports semantic web service search and composition through a ubiquitous portal engine.

Semantic web based knowledge searching system in mobile environment

In this paper we propose semantic web-based mobile knowledge searching systems for display Web pages on mobile terminals. The proposed system reduces the time of verification when mobile users search for information to which they want, and ontology-based browsing is possible and the computer can use these resources in mobile environment.