• The Journal of the Korea institute of electronic communication sciences
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• v.7 no.6
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• pp.1363-1368
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• 2012

Currently, basic simple search techniques for curriculum are being implemented. But curriculum information retrieval applying ontology technologies is still weak level. In this paper, the curriculum of university was divided into the liberal arts and majors, and we proposed frame model by these methodes and designed management system to construct ontology. This management system was composed of ontology input system and ontology web service system. Ontology input system constructed curriculum of department into ontology by administrator and we designed web service system to retrieve curriculum by students. We validated ontology designed for curriculum using ontology tool.

• Journal of Digital Convergence
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• v.11 no.9
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• pp.181-188
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• 2013

A new scheme needed to improve digital information accessibility with overall environment for handicapped persons is introduced in this paper. The improvement effects of digital information accessibility for handicapped persons are expected only when all the necessary hardwares and softwares need to input, process, output of information with social elements are provided all together. There are many previous papers regarded on web accessibility or IT technologies for handicapped persons separately. However, these subjects and computer accessibility are described here as a combined subject, and a new integrated improvement scheme including social factors and technical factors is suggested in this paper.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.27 no.10C
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• pp.912-920
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• 2002

As computer systems and communication technologies develop rapidly, CSCW(Computer Supported Collaborative Work) system appears nowadays, through which it is available to work on virtual space without any restriction of time and place. Most of CWCS systems depend on a special network and groupware. The systems of graphics and CAD are not so many because they are specified by hardware and application software. We propose a Web-based collaborative CAD system which is independent from any platforms, and develop a 3D solid modeler in the system. This system can be worked in the environment of Client/Server architecture. Clients connect to the design server through Java applet on WWW. The server is implemented by Java application.

• The KIPS Transactions:PartC
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• v.13C no.7 s.110
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• pp.813-820
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• 2006

The advance of computer and communication technologies enables the embedded systems to be equipped with the network communication interfaces. Their appearance in network leads to security issues on the embedded systems. An easy way to overcome the security problem is to adopt the packet filter that is implemented in the general computer systems. However, general packet filters designed for host computers are not suitable to embedded systems because of their complexity. In this paper, we propose a lightweight packet filter for embedded systems. The lightweight packet filter is implemented in the kernel code. And we have installed a Web-GUI interface for user to easily set the filtering policies at remote space. The experimental results show that the proposed packet filter decreases the packet delivery time compared to the packet filter designed for host computers and it is comparable to the systems without packet filter.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.10a
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• pp.958-961
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• 2005

This paper introduces the development of an integrated design system using Service-Oriented Architecture. The system is proposed and being developed based on several advanced technologies, such as multi-agents, Internet/web Service, workflow, database and is aiming to provide the successful fulfill our target of integrating personnel, design activities and engineering resources along a predefined engineering design project (workflow) during product development process. By using SOA concept, the system tries to separates the engineering process into the engineering knowledge and the usage of engineering tool. Consequently, the computing resources in organization can be fully utilized and thus the cost can be reduced. The system is being designed and developed on the base of JADE (Java Agent DEvelopment Framework).

• International journal of advanced smart convergence
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• v.10 no.4
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• pp.84-97
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• 2021

Digital twins are one of the promising digital technologies used to facilitate digital transformation. Therefore, it needs to continually be developed remain relevant in industry and academia. Consolidation of research is required to create a common understanding of the topic and to ensure that future research is built upon a solid foundation. Based on a bibliometric review and a thematic analysis of 217 publications on digital twins from the past two decades, this paper creates and analyzes a visual knowledge map and proposes areas for further research. To comprehensively analyze the development trends and research trends of digital twins, we performed statistical analysis of the relevant literature on digital twins within the core collection database of Web of Science. Through our research, we have shown that the current situation, trends, and hotspots of digital twin research were analyzed via CiteSpace. This study demonstrates that research on digital twins is rapidly growing in popularity, that the output of the research depends largely on the core group of authors conducting it, and that digital twins warrant cross-domain and cross-disciplinary research pathways.

• Journal of Korea Society of Digital Industry and Information Management
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• v.19 no.3
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• pp.245-251
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• 2023

Facial expression recognition plays a significant role in understanding human emotional states. With the advancement of AI and computer vision technologies, extensive research has been conducted in various fields, including improving customer service, medical diagnosis, and assessing learners' understanding in education. In this study, we develop a model that can infer emotions in real-time from a webcam using transfer learning with TensorFlow.js and MobileNet. While existing studies focus on achieving high accuracy using deep learning models, these models often require substantial resources due to their complex structure and computational demands. Consequently, there is a growing interest in developing lightweight deep learning models and transfer learning methods for restricted environments such as web browsers and edge devices. By employing MobileNet as the base model and performing transfer learning, our study develops a deep learning transfer model utilizing JavaScript-based TensorFlow.js, which can predict emotions in real-time using facial input from a webcam. This transfer model provides a foundation for implementing facial expression recognition in resource-constrained environments such as web and mobile applications, enabling its application in various industries.

• The Transactions of the Korea Information Processing Society
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• v.5 no.4
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• pp.1005-1013
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• 1998

In this paper, we describe technologies of Intranet administrator and user application used in the PEC(Protocol Engineering Center) Office Intranet system which provides platform independent application framework using Internet/Intranet standard technologies for distribution of Web documents and real-time multimedia information. The PEC Office is composed of administrator applications to support environments for administration of all applications including group/user add, update, and delete facilities and construction of user directory and user applications to support schedule sharing, virtual library, job report, output management, budget management, and real-time audio/video broadcasting services. These applications allow differentiation and customization services according to department and title employed per users.

• Journal of the Korea Computer Graphics Society
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• v.2 no.2
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• pp.69-74
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• 1996

With the emergence of integrated global market and increased competition, many companies are interested in sharing the product model data. One of the solutions is to share the product model data over the computer network or the internet using a standard format. CAD/CAM, STEP, and internet technologies make it possible to share the product model data. This paper presents methods to visualize 3D STEP geometry data on the internet. To create an internet-based STEP model visualizer, the programming language Java and 3D scene description language VRML have been experimented. The STEP geometry data can be displayed either by Java applets of by a VRML browser. These visualization technologies are applied to a PDM development. Engineers who have a low cost web browser can share the expensive design information even at a remote site.

• Journal of the Korea Computer Industry Society
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• v.5 no.9
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• pp.1043-1054
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• 2004

The area of business applications in the internet are extended enormously in result of fast development of computing and communication technologies, increase of internet use, and use of intranet/extranet in enterprise information system. In recent days network computing technologies have been developed rapidly and the extended use of Internet applications for enterprises such as intranet/extarnet in and between enterprises has been increased enormously. Therefore the business in the future will be executed by Electronic Commerce based on Business to Business(B2B). <중 략) This paper introduce the design and implementation of the data sharing support system that can be accessed data transparently by the users of participated enterprises in the integrated data environment supporting B2B Electronic Commerce. The system uses Java/CORBA technology in Web environment, relational and object-oriented database system, Object Query Language (OQL) to process the queries of the file information.