• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2008년도 하계종합학술대회
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• pp.507-508
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• 2008

• 한국진공학회:학술대회논문집
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• 한국진공학회 2006년도 제31회 학술논문발표회 초록집
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• pp.216-216
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• 2006

• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2007년도 학술대회
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• pp.247-250
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• 2007

There are three main kinds of service standards for 3G(Third-Generation) wireless communication as WCDMA, CDMA2000 and TD-SCDMA(Time Division-Synchronous Code Division Multiple Access). Compare with WCDMA and CDMA2000, TD-SCDMA system has distinguished technical characters. It is a TDD(Time Division Duplexing) based technology and deploys several advanced but in some respects complex technologies such as smart antenna, joint-detection and baton-handoff, etc. Therefore to analyze and design TD-SCDMA wireless network, it needs more efficient and systematic simulation tool. General simulation tool has so many analysis functions including path loss prediction, capacity and coverage analysis. For more suitable for TD-SCDMA, new additional technologies have to be implemented in simulation tool. Especially as the wireless network highly advancing focused on data service, it more needs to research and develop on the reliability of the simulation tool. In this paper, to give the concrete process and skill about how to implement TD-SCDMA simulation tool, we define the kinds of simulation tool and list basic analysis functions available for TD-SCDMA network design at first. And then we explain how to consider the effects of new technologies of TD-SCDMA and give the solutions about theses considerations.

• 한국인터넷방송통신학회논문지
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• 제12권6호
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• pp.65-73
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• 2012

본 연구에서는 일상생활에서 지속적으로 사용자의 맥박, 심전도, 활동량을 체크하고 이를 데이터베이스화 하여 원격지에서 모니터링 할 수 있도록 하는 손목형 단말기를 개발하였다. 이를 위해 맥파 측정을 위한 압력센서, 심전도 측정을 위한 기기 부착형 전극, 활동량 검출을 위한 3축 가속도센서를 이용하였다. 검출된 정보들에 대한 신호처리 과정을 거쳐서 사용자의 건강상태를 파악할 수 있는 정량적인 정보를 제공하는 알고리즘을 수립하고 펌웨어 프로그램을 적용하였다. 개발된 기기는 사용자가 손목에 착용하여 간단히 자신의 건강상태를 체크하고 블루투스 통신을 이용해 전송할 수 있는 개인용 단말기로서, 위급상황에 대한 신속하고 정확한 조치를 가능하게 함으로써 u-헬스케어 환경에 필요한 휴대형 기기로 활용될 수 있을 것이다.

• Clinical and Experimental Pediatrics
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• 제53권12호
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• pp.1012-1017
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• 2010

Purpose: Transcatheter closure has become an effective therapy in most patients with patent ductus arteriosus (PDA). However, there are difficulties in transcatheter closure of PDA in small children. We reviewed clinical outcomes of transcatheter closure of PDA in children weighing less than 10 kg in a single center. Methods: Between January 2003 and December 2009, 314 patients with PDA underwent transcatheter closure in our institute. Among them, 115 weighed less than 10 kg. All of these patients underwent transcatheter closure of PDA using either COOK Detachable $Coil^{(R)}$, PFM Nit-$Occlud^{(R)}$, or Amplatzer duct $occluder^{(R)}$. A retrospective review of the treatment results and complications was performed. Results: The mean age of patients was $9.1{\pm}5.9$ months (median, 8 months), and mean weight was $7.6{\pm}1.8kg$ (median, 7.8 kg). The mean diameter of PDA was $3.2{\pm}1.4mm$ (median, 3 mm). Complete occlusion occurred in 113 patients (98%). One patient was sent to surgery because of a failed attempt at device closure, and another patient had a small residual shunt after device placement. The average mean length of hospital stay was $3.0{\pm}3.3$ days, and mean follow-up duration was $21.0{\pm}19.6$ months. There were no major complications in any of the patients. Conclusion: Transcatheter closure of PDA is considered safe and efficacious in infants weighing less than 10 kg. With sufficient experience and further effort, transcatheter closure of PDA can be accepted as the gold standard of treatment for this group of patients.

• Journal of Information Display
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• 제8권2호
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• pp.10-14
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• 2007

A blazed $GxL^{TM}$ device is described as having high optical efficiency (> 70% for RGB lasers), and high contrast ratio (> 10,000:1), and that is highly reliable when used in a large-area laser projection system. It has a robust design and precise stress control technology to maintain a uniform shape (bow and tilt) of more than 6,000 ribbons, a $0.25-{\mu}m$ CMOS compatible fabrication processing and planarization techniques to reduce fluctuation of the ribbons, and a reliable Al-Cu reflective film that provided protection against a high-power laser. No degradation in characteristics of the GxL device is observed after operating a 5,000- lumen projector for 2,000 hours and conducting 2,000 temperature cycling tests at $-20^{\circ}C$ and $+80^{\circ}C$. At the 2005 World Exposition in Aichi, Japan the world's largest laser projection screen with a size of 2005 inches (10 m ${\times}$ 50 m) and 6 million pixels (1,080 ${\times}$ 5,760) was demonstrated.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 춘계학술대회 및 창립 30주년 심포지엄(논문집)
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• pp.241-246
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• 2006

이 논문에서는 안전한 해양레저 행위를 지원하기 위한 두 가지 개인 휴대용 전자장치 개발 내용을 기술한다. 하나는 조난자를 신속히 민-관-군 동시 다발적으로 수색하기 위한 선박용 9GHz 대역의 일반 레이더 전파에 응답하는 레이더 응답장치이다. 다른 하나는 조난자의 위치를 추적하고 식별할 수 있는 900MHz 스펙트럼 확산 주파수 홉핑 방식의 송수신기와 GPS를 이용한 해상 무선식별장치 개념의 전자장치이다. 해양경찰 함정을 이용한 해상에서의 다양한 현장실험을 통하여 두 가지 장비의 성능을 확인하였다. 그리고 향후 상용화 방안에 대해서 검토하였다.

• 정보학연구
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• 제9권3호
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• pp.49-57
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• 2006

Electronic paper technology is technology make e- paper, and studying an electronic device is thin like a paper book, an electronic device having made so as to be able to feel as it is feeling of paper like paper newspaper/paper magazines etc. and papers, and crumple freely, or to be able to fold. While electronic paper substitutes for role of paper, a digital function has at the same time a lot of the acids which shall exceed to implement. Necessary, and the continuous researcher who can solve a problem of a fast answer speed for animation implementation, collar implementation and low drive voltage is important a security of a patent right preparing for new market formation, too very in order to form the market where electronic paper can substitute for papers and the existing display as indication elements of a dream, and shall be made to achieve a continuous technical researcher.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.37-38
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• 2012

본 연구에서는 암호 칩의 부식방지를 위해 Si 기판위에 도핑된 산화물질로 구성된 복제 방지용 PUF 모델링 적용을 고려하였다. 이를 통하여 디바이스의 전자계 해석을 위한 정식화 방안을 모색하고 디바이스 복제기술에 대응할 수 있는 안전한 PUF를 설계하였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2005년도 추계학술대회 논문집 Vol.18
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• pp.16-17
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• 2005

Local lifetime control by ion implantation has become an useful tool for production of modern power devices. In this work, punch-through diodes were irradiated with protons for the high speed power diode fabrication. Proton irradiation was executed at the various energy and dose conditions. Characterization of the device was performed by I-V, C-V and Trr measurement. We obtained enhanced reverse recovery time characteristics which was about 45% of original device and about 73% of electron irradiated device. The measurement results showed that proton irradiation was able to effectively reduce minority carrier lifetime.