• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.6
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• pp.1096-1101
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• 2004

By a tremendous expansion of Internet users, there's a number effects that cause the phenomenon of bottlenecked switching packets from routers. In order to tear down this problem, distributed system is applicable to almost every highly performed router systems. The main processor of distributed system, which manages routing table, commands IPC to delivering the forwarding table line processor that eases functionalities of the router. This makes the system having wired-speed forwarding function based on the hardware so that the performance of the network can be enhanced. Therefore, IPC, which assign a part of router, is necessary to exchange data smoothly and the constitution of IPC using Ethernet is widely adapted as a method for saving investment. In this paper, R-IPC mechanism improve the packet-processing rate over 10% through changed from defect of conventional Ethernet IPC, that is, 2 layer processing to TCP/IP or UDP/ IP into 1 layer processing for efficient packet forwarding.

• The KIPS Transactions:PartA
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• v.9A no.4
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• pp.581-588
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• 2002

In implementing interactive multimedia systems, real-time visualization plays an important role. This paper presents efficient data structures and algorithms for real-time terrain navigation. Terrain data set is usually too huge to display as is. Therefore LOD (levels of detail) methods and view frustum culling are essential tools. This paper describes in detail compact hierarchical data structures, fast view frustum culling, and efficient LOD construction/rendering algorithms. Unlike previous works, we use a precise screen-space error metric for vertex removal and a strict error threshold allowing sub-pixel -sized errors only. Nevertheless, we can achieve 22 fps on average in a PC platform. The methods presented in this paper also satisfy almost all of the requirements for interactive real-time terrain Visualization.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.331-334
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• 2001

생산성 있는 소프트웨어 개발 및 관리를 위한 기술적, 산업적 전략은 웹 환경 하에서 컴포넌트 기반의 소프트웨어 개발(CBD : Component Based Development)로 점차 귀결되고 있다. 나아가 정보 공유의 투명성이나 비즈니스 로직의 독립적 패키징과 같은, 이 두 개의 기술들이 개별적으로 가지는 특성과 장점들을 결합한 웹 서비스로 전환되고 있다. 따라서 컴포넌트 중심의 웹 서비스를 위한 인프라 환경의 지원이 무엇보다 중요하게 되었다. J2EE는 이러한 요구를 수용하기 위한 가장 표준화된 플렛폼 중의 하나로, 다중 계층의 엔터프라이즈 솔루션을 위한 간단한 개발과 전개, 관리 방식을 보장한다. 본 논문에서는 CBD의 완성을 위한 실제적인 접근으로서 J2EE 환경의 EJB 컴포넌트를 위한 코드 자동 생성 도구를 개발한다. 이를 위해 EJB 컴포넌트를 구성하는 코드의 속성들을 분석하여 보편적인 EJB 컴포넌트의 템플리트를 설계하였다. 또한 도구 구축의 과정에서 세부적인 EJB 생성기의 구조와 기능적 특성을 명시화하고 개발에 필요한 EJB 컴포넌트 정보를 정의, 분류하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.920-923
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• 2002

As the new technologies, such as IEEE 1394, USB, Bluetooth, PLC are appeared, the embedded real time operating system which is satisfied the various technologies is needed. This paper proposed and implemented C standard library which is independently used in real time operating system and which supports an application development interface. The proposed C standard library is based on EL/IX, an Embedded Linux API based on POSIX, which is suitable for other embedded operating systems as well. And because the proposed C standard library has four level, it supports various Internet appliances, such as digital TV, settop box. The developed C library is tested at Qplus-P real time operating system which is developed at ETRI.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.30 no.4
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• pp.5-27
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• 2019

The purpose of this study is to present the direction of development of menu structure of museum web site through menu structure and content analysis of domestic museum web sites. To this end, menu structure was divided into content areas for 27 national, public, and university museums in Korea and analyzed in terms of organizing system, labeling system, and navigation system, which are components of information architecture. The results of the study suggested continuous management, including hierarchy of appropriate width and depth, use of clear and consistent labels, provision of collection search functions and updating the status of collections, and correction of web site errors, in the direction of development.

• Journal of the Korean Society for information Management
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• v.19 no.2
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• pp.69-92
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• 2002

A hybrid information service may include local and/or remote distributed services, both and electronic. Also, a hybrid information service can be described as one which an appropriate range of heterogeneous information services is presented to the user in a consistent and integrated way via a single interface. The purpose of this study is to suggest high-level requirements and logical architecture to design hybrid library. High-level requirements analysis for hybrid library need to contain baseline requirements, basic system requirements, searching, location, requesting, delivery and payment. A logical architecture need to consider logical architecture for hybrid library management system including user access points, hybrid library management system and hybrid library components and 5 layered architecture including presenter, coordinator, mediator, communicator and provider to achieve local simplicity while still supporting complex functionality of hybrid library.

• Journal of the Korean Society for information Management
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• v.30 no.2
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• pp.119-141
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• 2013

This study develops metadata elements based on the FRBR model for effectively managing and retrieving intangible cultural heritage records. Since intangible cultural heritage has a logical layer from its concept to a physical record that realizes the concept and it can be expressed in diverse formats such as video and audio, it is necessary to represent such rich relationships. Therefore, this study suggests a set of metadata elements at each of the four levels (work, expression, manifestation, and item) the FRBR Group 1 presents.

• The KIPS Transactions:PartB
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• v.9B no.5
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• pp.555-562
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• 2002

Increasing of electronic commerce users and high-capacity multimedia data is the main causes of increasing of load and network traffic in electronic commerce system. Increasing of load and network traffic brings the delay of service about client's request. And it's becoming factor that decreases customer satisfaction and corporation's competitive ability. So it is needed to research that consider efficient management and response time of electronic commerce system. In this paper, we designed electronic commerce system based on local server with web cashing function in order to solve load problem of electronic commerce system. And we proposed web cashing algorithm for local web server and analyzed performance by an experiment.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.3B
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• pp.91-99
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• 2008

In this paper, we design the function of ULSLE(Upper Layer Shared LAN Emulation) to provide both the efficient LAN service and compatibility with 802.1D bridge in Hybrid two-stage AWG based WDM-PON. The ULSLE layer lies above MAC control layer in order to provide a mean to interface WDM-PON and 802.1D bridge. It also performs LAN emulation based on PON-Tag which is only used to decide both the transmission mode and the destination of frames transmitted from ONUs. That is, the PON-Tag is not used for downstream frames but destination address field in original frame instead. This decreases the processing overhead and complexity caused by PON-Tag at OLT and ONU. The verification of designed ULSLE is performed according to the specific scenarios based on transmission mode and destination using OPNET.

• The Journal of the Korea Contents Association
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• v.20 no.3
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• pp.424-431
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• 2020

This paper focused on the development of sports robot that detects a human player and shots a serve ball automatically. When robot technologies apply to the sports machine, the domain problems occurs such as outdoor environments and playing condition to recognize the visual and the vocal modalities. Gaussian mixture model and Kalman filter are used to detect the player's position in the left, right, and depth direction and to avoid the noises caused by the player's posture variation around the net. The sports robot is designed by the pan-tilt structure to shot a serve ball by pneumatic control under the multi layered software architecture. Finally, the proposed tracking and the machine performance are discussed by experimental results.