• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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• pp.1312-1314
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• 2007

The effect of gate insulator surface treatment on electrical characteristics of bottom contact (BC) and suspended source/drain (SSD) organic thinfilm transistors (OTFTs) was studied. Triisopropylsilylethynyl pentacene was used as an active material and was printed by ink-jet printing method. In case of the BC OTFTs, threshold voltage was shifted from positive to near zero, and the fieldeffect mobility was increased when the gate insulator surface was treated with hexamethyldisilazane. However, in case of SSD OTFT, threshold voltage shift was not observed and the field-effect mobility was decreased.

• Biotechnology and Bioprocess Engineering:BBE
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• 제8권4호
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• pp.252-256
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• 2003

In this paper we describe the status of a silicon-based microelectrode for neural recording and an advanced neural interface. We have developed a silicon neural probe, using a combination of plasma and wet etching techniques. This process enables the probe thickness to be controlled precisely. To enhance the CMOS compatibility in the fabrication process, we investigated the feasibility of the site material of the doped polycrystalline silicon with small grains of around 50 nm in size. This silicon electrode demonstrated a favorable performance with respect to impedance spectra, surface topography and acute neural recording. These results showed that the silicon neural probe can be used as an advanced microelectrode for neurological applications.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.973-974
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• 2008

Optically transparent and flexible electronic circuits and displays are attractive for next-generation visual technologies, including windshield displays, head-mounted displays, and transparent screen monitors. Here we report on the fabrication of transparent transistors and circuits based on the combination of nanoscopic dielectrics and organic, inorganic, or hybrid semiconductors. Furthermore, the first demonstration of a transparent and flexible AMOLED display driven solely by $In_2O_3$ nanowire transistors (NWTs) is reported. The display region exhibits an optical transmittance of ~35% and a green peak luminance of ${\sim}300\;cd/m^2$. These results indicate that NWT-based drive circuits are attractive for fully transparent display technologies.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1398-1400
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• 2005

A novel data driver for passive matrix organic lightemitting devices (PM-OLEDs) with high gray scale images was designed. The proposed circuit consisted of a main current bias circuit as well as sample & hold circuits in each channel of the data driver to compensate a current offset. These results indicate that a data driver designed by using the current offset compensation technique holds promise for poten tial applications in PM-OLED displays with high gray scale images.

• Journal of Information Display
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• 제12권4호
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• pp.219-222
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• 2011

Iridium-(III)-bis[(4,6-di-fluorophenyl)-pyridinate-N,$C^2$' ]picolinate-based blue phosphorescent organic light-emitting diodes with different electron transport materials were fabricated. Each electron transport material had different electron mobilities and triplet energies. The device with 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene had the highest external quantum efficiency (20.1%) and luminous current efficiency (33.1 cd/A) due to its high electron mobility and triplet energy. The operational stability of each device was also compared with that of the others. The device with 2,2',2"(1,3,5-benzenetriyl)tris-(1-phenyl-1H-benzimidazole) was found to have a longer lifetime than the other devices.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 가을 학술발표논문집 Vol.33 No.2 (B)
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• pp.470-474
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• 2006

지문인식 시스템의 성능을 측정하기 위해 지문 데이터베이스가 필요하지만, 개인 사생활 문제나 데이터베이스를 구성하기 위한 제약조건 등으로 인해 실제 사용가능한 지문 데이터베이스는 많지 않다. 본 논문에서는 유전자 알고리즘을 이용하여 수집된 지문 영상으로부터 다양한 환경적 효과를 가진 지문 영상을 자동으로 생성해주는 방법을 제안한다. 제안하는 방법은 소량의 원본 영상으로부터 목표 환경의 지문을 생성하기 위한 필터 조합을 찾는다. 서로 다른 압력에서 수집된 지문을 대상으로 제안하는 방법을 적용하였으며, 생성된 지문 영상은 실제 환경에서 수집된 것과 비슷한 특성을 나타내었다. 제안하는 방법을 통해 실제로 다수의 지문을 수집하지 않고 각종 환경에서 시스템의 성능을 평가할 수 있다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1997년도 Proceedings International Workshop on New Video Media Technology
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• pp.89-94
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• 1997

In this paper, we present a VR-based interface method which provides users more natural, realistic, and interactive communication and collaboration tool. Since most services in the communication systems matches with the services in the real world, the best understanding would be achieved when the communication services are represented in accordance with the services in the real world. However, conventional text-based interface and 2D GUI cannot provide such reality to the users. In this paper, we discuss VR-based interface to overcome such difficulty and introduce one instance of communication system using the VR-based realistic, what we call Virtual Village, which we are currently developing. This application might be applied to education in virtual space, desktop conferencing system, and entertainment such as MUD or the games in the distributed environment, etc.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2002년도 가을 학술발표논문집 Vol.29 No.2 (2)
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• pp.667-669
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• 2002

중국어 V＋NP$_1$＋的＋NP$_2$형 패턴은 동사구와 명사구로 분석이 가능하여 중국어 구문분석의 결과에 중요한 영향을 미친다. 본 논문은 중국어 V＋NP$_1$＋的＋NP$_2$형 패턴의 구조적 중의성 문제를 해결하기 위한 방법을 제안한다. 제안하는 방법은 통계정보로 보완된 동사의 결합가 정보, 두 명사간의 결합도 정보 및 휴리스틱으로 구조적 애매성을 해소하고자 한다.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 1998년도 Proceedings of International Workshop on Advanced Image Technology
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• pp.99-104
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• 1998

Application sharing is the ability to use existing applications, such as Excel or MS-Word, during a group session without modification. In this paper, we present the design and implementation of an application sharing system, called ShareIt, which enable users to share arbitrary MS-Windows applications under the Win 3.1/95/NT and X window system, and evaluation of the system performance. To share an application, the image of the application window is captured and transmitted to other sites. With the use of the window capturing method, ShareIt allows any MS-Windows application to be shared regardless of not only the window systems but also the version-up of window systems.

• 한국정보과학회 언어공학연구회:학술대회논문집(한글 및 한국어 정보처리)
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• 한국정보과학회언어공학연구회 2007년도 제19회 한글 및 한국어 정보처리 학술대회
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• pp.165-168
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• 2007

본 연구에서는 문서의 문장들을 순위화하여 추출하는 일반적인 문서 요약 방법론을 소개한다. 첫 번째 단계는 주제와 관련되는 동사, 명사, 형용사(VNA) 단어들의 집합을 구하여 각 문장의 주제 관련성 정도를 결정하며, 두 번째 단계는 단어들의 의존관계를 통해 각 문장의 정보 함유량을 판단한다. 두 개의 방법은 모두 주제와 관련된 정보를 많이 내포하는 문장에 중요도를 부여하고 있다. 이러한 방법은 주제와 연관성이 높고 정보전달성이 높은 문서요약을 만들기 위함이다. 생성된 문서요약본의 성능평가는 문서요약의 결과로 추출된 문장들과 설문에 의해 추출된 문장들의 일치율에 의해 시행되었으며 68%의 일치율을 보였다.