• Journal of Convergence for Information Technology
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• v.7 no.6
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• pp.173-179
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• 2017

Recently, with the development of IoT, there have been increasing cases of transmitting and receiving data by connecting more than one devices supporting various communication methods. In this paper, we propose a multi-terminal emulator supporting various communication methods. The system supports multiple channel connections for each communication method, schedules data transmission, collects communication statistics, represents them into graphs, and stores log records. By using this system, it is possible to test the communication connection between multiple devices, and it is expected to provide convenience for IoT system development.

• The Journal of the Korea institute of electronic communication sciences
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• v.2 no.4
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• pp.236-243
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• 2007

Radio frequencies used by the logistics of RFID in various areas, including research the core of ubiquitous computing. Moreover, RFID and the convergence of mobile terminals RFID research started as a B2B service area, B2C services and the expansion of the zone. B2B2C to in order to provide services ranging from mobile terminals for RFID technology development is needed. We develop middleware for a mobile RFID terminal. It consists of multi-code recognition module, the reader control module, the module code interpretation, and Dispatcher module. We present the implementation of these functions on an emulator.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.538-540
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• 2001

인터넷 기술의 발달과 사용자들은 언제 어디서나 원하는 정보를 얻기를 원하게 되었다. 이러한 요구론 배경으로 무선 인터넷 시장은 급속한 발전을 이루고 있다. 그리고 사용자들의 요구도 점차 다양화되고 있는 실정이다. 그로 인해 대표적인 무선 인터넷 기반 언어인 WML(Wireless Markup Language)과 WMLScript를 개발자가 좀 더 실제와 같은 상황에서 편리하게 개발할 수 있는 환경이 필요하게 되었다. 본 논문에서는 CP(Content provider)들이 현실감 있게 무선 컨텐츠를 개발, 브라우징 할 수 있도록 하는 WAP Emulator에서 브라우저의 구조와 WMLScript Interpreter글 포함하고 있는 인터페이스 설계와 구현에 대하여 기술한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.12 no.1
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• pp.71-81
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• 1987

To fuly utilize the availability of the ISDN, it is very important to develop the ISDN user terminals which can provide various user services. In this paper, the basic concept of the ISDN user terminal is briefly studied and, based on this study, a stimulus type digital telephone which can be connected directly to the ISDN is designed. This digital telephone can provide the basic voice service and has general functions such as voice encoding / decoding(PCM is used), user-network signalling, digital tone supply, channel selection, key pad and atatus display. Echo cancellation method is adopted for the digital subscirber loop transmission and user-network signalling is implemented according to the LAPD(Link Access Procedure on D-channel) protocol recommended by the CCITT's recommendations I.440-I.441. The validity of designed S/W and H/W functions are verified by testing them with ISDN circuit switching emulator described in the first part of this paper.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.380-381
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• 2016

MIDS(Multifunctional Information Distribution System)은 Link16의 작전 운용성을 공중/지상/해상 플랫폼에 확장하기 위해 설계된 전술정보 통신 체계이다. MIDS LVT(Low Volume Terminal)는 제한된 공간, 전력, 공조 시스템 환경에서도 MIDS 운용이 가능하도록 설계가 된 장비로써 본 장비를 탑재한 플랫폼은 Link16 시스템 상에서 통합위치 결정(Intergrated position determination), 운항 및 식별(Navigation and identification), 음성 및 데이터 통신 기능을 수행할 수가 있다. 본 논문에서는 이러한 MIDS에 대한 간략한 소개 및 MIDS LVT 에뮬레이터와의 연동을 통한 시뮬레이션 환경 구축 사례에 대해 다루도록 하겠다.

• International Journal of Fuzzy Logic and Intelligent Systems
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• v.4 no.2
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• pp.223-230
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• 2004

In this paper, we will introduce a control strategy based on the permanent magnet linear synchronous motor (PMLSM) container transfer system using soft-computing algorithm. Linear motor-based container transport system (LMCTS) is horizontal transfer system for the yard automation, which has been proposed to take the place of automated guided vehicle in the maritime container terminal. LMCTS is considered as that the system is changed its model suddenly and variously by loading and unloading container. The proposed control system is consisted of two DR-FNNs that act the role of controller and system emulator. Consequently, the system had the predictable structure and an ability to adapt for a huge variation of rolling friction, detent force, and sudden changes of its weight by loading and unloading.

• Journal of Biomedical Engineering Research
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• v.14 no.4
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• pp.321-326
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• 1993

Recently, microcomputer technology has been developed rapidly and it provides not only graphic user interface that can be fraendly accessable but also large storage capacity to han- dle much hospital information. Almost all the order communication system for hospital has been developed under the concept of host and terminal environment since last 20 years. However, host-terminal system has not been successful in korea simply because most of physicians prescibe for rrlany patients a day(sometimes more than 150 patients a day). Also, under the host-terminal environment, programs are not friendly implemented for users. Since March 1991, we had developed order communication system for out-patients(named YONSEI-PC) using personal computer(PC) and local area network(LAN) . Since September 1992, we has applied succesfully in the Yonsei Cardiovascular Center, Sevrance Hospital, Yonsei University College of Medicine. This system consisted with Server and Clients which is communicated through LAN(Ethernet). The system also use the Host computer(IBM 9221 170) as a data bank and communicates to the Server with emulation card(3270 emulator, Interlink Inc., Korea) . After introducing this system, it enables patients to receive drugs witllin 20 minutes after prescription of 300-400 patients per day and it seemed to be effective system not to reduce waiting time for the patients but also to remove charge-troubling(due to His-entry of prescription) . This system also seems to be effective in terms of office automatism for hospital management. However users, usually physitions, required more friendly and easy system to operate and we thought that the most important one to successfully introduce order communication computer system in the hospital is user interface.