• Proceedings of the KIEE Conference
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• 2005.07c
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• pp.2465-2467
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• 2005

In this paper, we propose the system that can monitor and control the camera in the remote place using the PDA. The server PC attached to the PLC (Programmable Logic Controller) acquires the current status (On/Off) of the devices through the RS-232 serial communications. Also, the moving image frames captured from the wireless camera is compressed in the JPEG format and is stored in the server. The PDA, which is connected to the server through wireless internet, receives the data about the status of the devices and controls the devices according to the circumstances of them. Also, it can receive the images from the server simultaneously. So, we can monitor and control the specified area in the remote place using the PDA through the wireless communication.

• Proceedings of the KIEE Conference
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• 2005.07b
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• pp.1823-1825
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• 2005

In this paper, we propose the system that can monitor and control the camera in the remote place using the PDA. The server PC attached to the PLC(Programmable Logic Controller) acquires the current status(On/Off) of the devices through the RS-232 serial communications. Also, the moving image frames captured from the wireless camera is compressed in the JPEG format and is stored in the server. The PDA, which is connected to the server through wireless internet, receives the data about the status of the devices and controls the devices according to the circumstances of them. Also, it can receive the images from the server simultaneously. So, we can monitor and control the specified area in the remote place using the PDA through the wireless communication.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.26-28
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• 2019

Parse Server는 오픈소스 백엔드 서비스를 제공함으로 IoT 최적의 서비스 플랫폼이며, 개발자에게 프론트 엔드 개발 집중이 가능하도록 일련의 도구를 제공한다. 본 논문에서는 교육용 활용 사례 개발을 위해 Parse Server를 오픈소스 기반의 게임과 연동하여, 게임 랭킹 서비스 시스템 구현을 통해 IoT 시스템 프로그래밍 교육 콘텐츠로의 가능성 확인을 목표로 한다. 구현 결과는 게임 랭킹의 변화를 Parse Dashboard를 통하여 확인하였다.

• Journal of KIISE:Computer Systems and Theory
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• v.29 no.6
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• pp.318-330
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• 2002

This paper discusses the design and implementation of a video server which uses tertiary device, such as magneto-optical jukebox or tape library, as a source of media archiving. In order to handle the tertiary device in the framework of disk-based stream service model, a sophisticated streaming model is required for server and it should consider the device-specific performance characteristics of tertiary storage. We have carefully designed the streaming mechanism for server whose key functionalities include stream scheduling, disk caching and admission control. The proposed system has been implemented on Windows 2000 platform which is equipped with a magneto-optical jukebox. The design principles of the server are validated with the experiments and the performance characteristics is analyzed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.579-582
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• 2004

File share system in client/server method requires server of High performance and capacity and this server is very expensive and management is complex and is been influenced much to flatform. Also, extension of correct memory or hard drive etc. causes a lot of expenses to server. While, may minimise human who happen by buying high-capacity server by dispersing file public ownership way unuse expensive server in client/serve. way who put up files in PC(client) to a sewer and manage files and make use of only client computers because public ownership of data and government official in P2P(peer to peer) environment, waste of material resources. Many people are interested to P2P by such reason, researches that use P2P to connection field to be Moba that have Gakgwangbatgo current are gone vigorously.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.01a
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• pp.69-70
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• 2022

본 논문에서는 Photon Network를 사용하여 경찰과 도둑 컨셉으로 5명이 함께 즐길 수 있는 Multi Game을 구현하였다. 서버는 리슨 서버 방식으로 Master Client가 게임을 시작하면 Game에 참가한 모든 Player는 Photon Network의 RPC 기능을 사용하여 Player의 동작, Game 진행 상황 등을 실시간으로 Server에 동기화한다.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06a
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• pp.321-322
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• 2008

• Proceedings of the IEEK Conference
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• 2000.07a
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• pp.257-259
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• 2000

In this paper, a word-unit recognition is performed to implement a speech recognition system over the web, using JAVA Applet and continuous distributed HMM. The system based on Client/server model is designed. A client computer processes speech with Applet, and then transmits feature parameters to the server computer though the Internet. The speech recognition system in the server computer transmits the result applied by the forward algorithm to the client computer and the result is displayed in the client computer by text.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04b
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• pp.1045-1048
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• 2002

사회 전반에 걸친 정보화의 물결은 각종 새로운 패러다임을 형성해 가고 있다. 이와 더불어 매우 보수적이고 일반인이 접근하기에는 다분히 폐쇄적인 병원환경에서도 정보화의 필요성을 절감하고 정보화의 도입이 이루어지고 있는 실정이다. 의학분야의 정보화를 이루기 위해 PACS(Picture Archiving and Communications System)가 개발되었으며 현재는 여러 병원에서 이를 도입하여 업무향상과 경비절감을 이루고 있다. 본 논문에서는 PACS에 대한 간략한 소개와 PACS를 구성하는 여러 가지 구성 요소들에 대한 설명 및 PACS 도입에 따른 여러 가지 장점들과, 본 논문에서 제안하는 PACS용 Server System의 설계 및 구현에 대하여 논의한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.1
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• pp.22-37
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• 2013

Content distribution to a large number of concurrent clients stresses both server and network. While the server limitation can be circumvented by deploying server clusters, the network limitation is far less easy to cope with, due to the difficulty in measuring and balancing network load. In this paper, we use two useful network load metrics, the worst link stress (WLS) and the degree of interference (DOI), and formulate the problem as partitioning the clients into disjoint subsets subject to the server capacity constraint so that the WLS and the DOI are reduced for each session and also well balanced across the sessions. We present a network load-aware partition algorithm, which is practicable and effective in achieving the design goals. Through experiments on PlanetLab, we show that the proposed scheme has the remarkable advantages over existing schemes in reducing and balancing the network load. We expect the algorithm and performance metrics can be easily applied to various Internet applications, such as media streaming, multicast group member selection.