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RFID를 위한 내장형 비접촉(Type-B) 프로토콜 지원 모듈 설계 및 구현
전용성,박지만,주홍일,전성익,Jeon, Yong-Sung,Park, Ji-Mann,Ju, Hong-Il,Jun, Sung-Ik 한국정보처리학회 2003 정보처리학회논문지 A Vol.10 No.3
RFID의 대표적 예인 비접촉식 IC 카드는 현재 교통 및 출입 통제 시스템 등에 널리 사용되고 있으며, RF 기술의 발달과 사용자 편의성 요구의 증대로 인해 점점 더 보편화되는 추세에 있다. 본 논문은 비접촉 IC 카드를 구현하기 위해 필요한 내장형 비접촉 프로토콜 처리용 하드웨어 모듈에 관한 것으로서 아날로그 회로부와 특화된 디지털 로직부로 구성된다. 그리고 비접촉 IC 카드 설계시 아날로그 회로, 디지털 로직, 그리고 소프트웨어가 담당한 기능을 잘 구분하여 설계할 수 있는 방법을 제시한다. In recent, as a typical example of RFID, the contactless IC card is widely used in traffic, access control system and so forth. And its use becomes a general tendency more and more because of the development of RF technology and improvement of requirement for user convenience. This paper describes the hardware module to process embedded contactless protocol for implementation contactless IC card. And the hardware module consists of analog circuits and specific digital logic circuits. This paper also describes more effective design method of contactless IC card, which method separates into analog circuit parts, digital logic circuit part, and software parts according to the role of the design parts.
전용성(Jeon Yong Sung),한종욱(Han Jong Wook),조현숙(Cho Hyun Sook) 한국정보보호학회 2010 情報保護學會誌 Vol.20 No.3
본 논문에서는 현재 산업체뿐 만 아니라, 개인 생활에 많은 영향을 미치고 있는 영상보안 산업의 기술 현황을 살펴보고, IP 환경으로 진화함에 따른 차세대 영상보안시스템이 가져야할 요구사항과 이에 대한 국내외 기술개발 현황을 살펴보았다. 특히, 영상보안 기술의 발전 방향으로 예상되는 고해상도 네트워크 카메라, NVR, 그리고 차세대 영상보안을 선도할 스마트카메라 기술에 대해 분석하였다.
간 절제술후 초기 예후 인자로서의 동맥혈 Ketone Body Ratio의 의의
전용성(Yong Sung Jeon),김홍진(Hong Jin Kim),심민철(Min Chul Shim),권굉보(Koing Bo Kwun) 대한소화기학회 1995 대한소화기학회지 Vol.27 No.5
N/A Background/Aims: Recent surgical techniques have enabled surgeons to undertake radical operations for a much wider range of liver diseases, but the invasive nature of such operations requires that they be followed up by careful and intensive postoperative management. Since the introduction of the oxidation-reduction(redox) theory in the beginning of 1980s, the significance of the arterial ketone body ratio(acetoactate/g-hydroxybutylate), which reflects hepatic mitochondria] oxidation-reduction potential, has been discussed as one of the metabolic parameters of organ failure. The aim of this study was to assess the significance of arterial ketone body ratio as an early prognostic indicator in liver surgery. Methods: In this study, arterial ketone body ratio and total ketone body concentration were serially measured in 83 patients who underwent liver resection in the department of surgery of Youngnam University Hospital between May 1992 and Feburary 1994. Results: At the postoperative 1 day, arterial ketone body ratio was significantly higher in successful recovery group(n=71, 1.22 0.59) than that of the postoperative complication and mortality group(n=12, 0.66 l 0.34). And patients were classified into three groups by the decrease of ketone body ratio in the postoperative 1 day: group A(70 cases) with ketone body ratio above 0.7, group B(12 cases) between 0.7 and 0.4, and group C(1 case) below 0.4. In group A, 63 patients(90%) were recovered, 6 patients complicated and 1 patient dead. In B group, 8 patients(66.6%) was recovered, 2 patients complicated and 2 patients dead. The only patient of group C(100%) was dead. Conclusions: Postoperative AKBR is useful as an early prognostic indicator in liver surgery, and maintenance of AKBR above 0.7 is crucial to obtain a good surgical outcome. (Korean J Gastroenterol 1995;27: 555 - 562)
LED 조명용 One-Stage PFC Flyback 컨버터에서의 출력단 리플 저감과 전해 커패시터의 제거에 관한 연구
전용성(Yong-Sung Jeon),진달래(Dal-Lae Jin),나재두(Jae-Du La),김영석(Young-Seok Kim) 대한전기학회 2012 전기학회논문지 Vol.61 No.11
In the lighting industry, a Lighting Emitting Diode (LED) is increasingly used because of many advantages and a eco-friendly product comparing with the conventional lighting. However, the LED lighting has to include various AC/DC converters because the direct current is used for the LED lighting. Among a lot of power converters, the flyback converter is widely used for the LED lighting and includes some electrolytic capacitors for the voltage regulation. But the electrolytic capacitor has shorter lifetime than the LED element. It makes the expected life-time of the converter having the electrolytic capacitor shorter than the LED element. This paper proposes the single-stage PFC flyback converter without electrolytic capacitors. To verify the performance of the proposed converter, simulated and experimental works were carried out.
전기자동차용 PTC 히터 구동을 위한 입력 필터를 갖는 벅 컨버터의 특성 분석 및 성능 평가
전용성(Yong-Sung Jeon),신혜수(Hye-Su Shin),채범석(Beom-Seok Chae),나재두(Jae-Du La),김영석(Young-Seok Kim) 대한전기학회 2012 전기학회논문지 P Vol.61 No.2
Recently, the market of Electric Vehicle(EV) is increasing more and more than before. Thus a new heater for the EV is required. The PTC devices may be used the heater for the EV. In this paper, a simple DC-DC Converter is proposed as the PTC Heater for the EV. The proposed circuit was optimally desired to decrease the stress of the power devices and reduce the current ripples. To apply the result of the test in the laboratory to the actual EV system with the high DC voltage, ripple current, average current and output peak current are predicted by using the least-squares method. Finally, the proposed circuit is validated, by various experiments.
전용성(Yong-Sung Jeon),박정선(Jung-Sun Park) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Satellite opper platform is optimized by response surface method which has non-gradient, semi-glogal, disorate and fast convency characteristies. Sampling poinrs are extraced by design of experments using Central Composite Method and Factorial. Also response surface is generetes by the warious regression functions. Strueture analysis is execuated with rehard for static and dynamic encvironment in launching sthage, As a result response method is superior to other optimization mathod with respect to optimum value and cost of computation time. Also a confidence is varified in the various regression models.
ITU-T SG17에서의 차량 통신 보안 국제 표준화 동향
이상우(Sang-Woo Lee),전용성(Yong-Sung Jeon) 한국정보보호학회 2022 情報保護學會誌 Vol.32 No.4
최근 자율주행차량등의 활발한 기술 개발 및 상용화가 추진되고 있다. 자율주행차량에서는 기존의 센서로부터 수집되는 주변 환경 정보의 한계를 극복하기 위하여 차량통신기술을 활용하여 주변 환경을 보다 정확하고 상세하게 인지하는 필요성이 강조되고 있는 실정이다. 이러한 차량통신기술의 활용성이 증대됨에 따라, 보안 위협에 대응하기 위한 보안 기술도 활발히 연구 개발 추진 중이며, 이와 연관된 국제표준화의 필요성도 부각되고 있다. 최근 IT 보안 국제표준화 기구인 ITU-T SG17에서는 연구반 구조 조정을 진행했으며, ITS(Intelligent Transport Systems) 보안 연구반(Q13)은 지속적으로 차량통 신표준화를 추진한다. 본 논문에서는 ITS 보안 연구반의 최근 활동 및 진행 계획을 소개한다.