• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 1부
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• pp.1240-1245
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• 2006

한국어 문장을 구조 분석할 때에 모호성을 발생시키는 유형 중의 하나가 나열 및 병렬형이다. 문장 구조 복잡도를 증가시키는 나열 및 병렬형을 구조 분석 전에 미리 하나의 단위로 묶어서 처리하는 것이 문장 구조 분석의 정확도를 높이는데 중요하다. 본 연구에서는 형태소 태그를 이용한 기본 규칙으로 문장을 청크 단위로 분할하고 분할된 청크 중에서 나열형을 인식하여 해당되는 청크들을 하나의 나열 청크로 통합하여 청크의 개수를 줄인다. 병렬형에 대해서는 반복되는 병렬 청크의 범위와 생략된 용언을 복원한다. 이러한 인식은 첫 단계로 기호(symbol)를 중심으로 구축된 간단한 규칙으로 인식을 하고 이러한 규칙에 해당되지 않는 형태의 나열 및 병렬형은 Maximum Entropy 모델을 이용하여 적용한다. ME모델은 어휘자질, 형태소 품사 자질, 거리 자질, 의미자질, 구 단위 태그 자질(NP:명사구, VP:동사구, AP:형용사구), BIO 태그(Begin, Inside, Outside) 자질에 대한 ME(Maximum Entropy) 모델을 이용하여 구축되었다.

• Archives of Pharmacal Research
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• 제20권1호
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• pp.58-67
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• 1997

In order to find antiviral compounds against Herpes simplex virus type I (HSV-1) and II (HSV2) from natural products, a convenient virus-induced cytopathic effect (CPE) inhibition assay was introduced. More than 300 fractions were prepared by solvent fractionation from sixty collected plants or purchased herbal medicines, and their anti-herpetic activities were evaluated. Among them, several medicinal plants showed potent anti-herpetic activity. Selective indexes (SI) of the EtOAc extract of Caraganae Radix (Caragana sinica) against HSV-1 and HSV-2 were more than 8.06 and 24.79, SI of the MeOH extract of Acer okamotoanum leaves were 3.92 and 3.51, SI of the $CH_{2}Cl_{2}$ extract of Veratri Rhizoma et Radix (Veratrum patulum) were 5.49 and 1.31 and SI of the MeOH extract of aerial part of Osmundae Rhizoma (Osmunda japonica) were more than 3.45 and 1.25, respectively.

• Journal of Microbiology and Biotechnology
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• 제29권7호
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• pp.1137-1143
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• 2019

Hepatitis E virus (HEV) accounts for 20 million infections in humans worldwide. In most cases, the infections are self-limiting while HEV genotype 1 infection cases may lead to lethal infections in pregnant women (~ 20% fatality). The lack of small animal models has hampered detailed analysis of virus-host interactions and HEV-induced pathology. Here, by employing a recently developed culture-adapted HEV, we demonstrated that methyltransferase, a non-structural protein, strongly inhibits melanoma differentiation-associated gene 5 (MDA5)-mediated activation of type I interferon responses. Compared to uninfected controls, HEV-infected cells display significantly lower levels of $IFN-{\beta}$ promoter activation when assessed by luciferase assay and RT-PCR. HEV genome-wide screening showed that HEV-encoded methyltransferase (MeT) strongly inhibits MDA5-mediated transcriptional activation of $IFN-{\beta}$ and $NF-{\kappa}B$ in a dose-responsive manner whether or not it is expressed in the presence/absence of a tag fused to it. Taken together, current studies clearly demonstrated that HEV MeT is a novel antagonist of MDA5-mediated induction of $IFN-{\beta}$ signaling.

• 한국진공학회:학술대회논문집
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• 한국진공학회 2012년도 제43회 하계 정기 학술대회 초록집
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• pp.435-435
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• 2012

ITER를 비롯한 실증로나 상용로급 토카막에서는 중성빔 가열이나 전류구동을 위해 1MeV이상의 빔 에너지가 요구된다. 빔 출력이 가속전압의 5/2승에 비례함에도 불구하고 양이온 빔의 경우 에너지가 높아지면 빔의 중성화 효율이 급격히 감소하여 ITER NBI의 경우 양이온 빔의 중성화 효율은 0%에 가깝다. 한편 음이온 빔은 1MeV 이상의 에너지영역에서도 빔 에너지와 거의 무관하게 60% 정도의 중성화 효율을 갖는다. 따라서 ITER는 음이온 빔을 바탕으로 한 중성빔 가열장치(N-NBI)를 채택하고 있다. 우리나라의 핵융합연구가 핵융합 발전을 지향하는한 N-NBI에 대한 연구를 시작해야 하며 그 출발점으로 음이온원 개념설계를 시작하였다. 개념설계는 음이온원 개발과정을 통해 1) 음이온 생성원리 규명, 2) 음 이온원 핵심기술 확보, 3) 음이온 및 음이온 빔 관련 진단 등을 연구할 수 있는 축소규모의 proto-type 음이온원 개발을 목표로 하였다. 음이온원 개발은, 초기에는 KAERI NB test stand 및 KAERI 이온원의 플라즈마 버켓을 활용하기 위해 filament-arc type으로 시작하지만 어느정도 기반이 확립되면 플라즈마 버켓의 electron dump를 제거하고 그 자리에 RF driver를 장착하여 궁극적으로 RF 음이온원을 개발할 계획이다. 본 학회에 발표하는 포스터는 filament-arc type 음이온원에 대한 개념설계이다. 설계된 음이온원은 Tent-type 자장필터를 장착하며, 0.5A의 수소 음이온빔 인출을 목표로 하고 있다. 이를 위해 플라즈마 버켓, 세슘 공급시스템, bias plate, 플라즈마 그리드, electron deflection 자석이 설치된 인출 그리드, 접지 그리드 등에 대한 개념설계가 이루어 졌다. 이 외에도 음이온원 전원과 진단 시스템에 대해서도 논의하였다.

• 한국결정성장학회지
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• 제10권2호
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• pp.96-99
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• 2000

우리는 hot-well epiraxy 방법으로 성장된 ZnSe 박막의 광발광 측정을 10 K에서 실행하였다. as-grown 박막은 upper polartion과 lower polarition으로 분리된 중성 도너(donor) bound exciton $I_2$($D^{\circ}$,X)가 아주 우세하게 관측되었고 Se분위기 열처리 결과 $I_2$기원이 Se-vacancy에 관련이 있음을 알았다. 또 중성 억셉터(acceptor) bound exciton $I_1$$^d$발광이 관측되었다. 그런데 ZnSe는 self-compensated에 의해 p-type 반전이 어렵다. 우리는 Se 분위기 열처리로부터 $I_1$$^d$ 봉우리가 아주 우세함을 보였다. 이것은 열처리한 ZnSe 박막에 억셉터가 풍부하게 존재한다는 것을 의미하며 결과적으로 광학적인 p-type 반전을 분명하게 관측 할 수 있었다. 또한 엑셉터 불순물의 결합 에너지는 268meV이였다. 장파장대에서 SA 발광은 Se 분위기 열처리 후 사라진 것으로 보아 Se-vacancy와 관련이 있는 것으로 고찰되었다.

• Journal of Microbiology and Biotechnology
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• 제28권9호
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• pp.1554-1562
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• 2018

The type I interferons (IFNs) play a vital role in activation of innate immunity in response to viral infection. Accordingly, viruses have evolved to employ various survival strategies to evade innate immune responses induced by type I IFNs. For example, hepatitis E virus (HEV) encoded papain-like cysteine protease (PCP) has been shown to inhibit IFN activation signaling by suppressing K63-linked de-ubiquitination of retinoic acid-inducible gene I (RIG-I) and TANK-binding kinase 1 (TBK1), thus effectively inhibiting down-stream activation of IFN signaling. In the present study, we demonstrated that HEV inhibits polyinosinic-polycytidylic acid (poly(I:C))-induced $IFN-{\beta}$ transcriptional induction. Moreover, by using reporter assay with individual HEV-encoded gene, we showed that HEV methyltransferase (MeT), a non-structural protein, significantly decreases RIG-I-induced $IFN-{\beta}$ induction and $NF-{\kappa}B$ signaling activities in a dose-dependent manner. Taken together, we report here that MeT, along with PCP, is responsible for the inhibition of RIG-I-induced activation of type I IFNs, expanding the list of HEV-encoded antagonists of the host innate immunity.

• 품질경영학회지
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• 제16권1호
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• pp.43-48
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• 1988

Most of silicone used for water repellent finish is MHP (methyl hydrodiene polysiloxane), which is formed by hydrolysis and condensation polymerization of MHD (methyl hydrodiene dichlorosilane: Me H Si $Cl_2$). The cross-linking theory explains the water repellent mechanism of MHP. The silicone finish on fiber could improve in handle, softness, abrasion resistance, soil repellency, tear strength and crease resistance, as well as water repellency. According to using method silicone-water repellent finishing agents, could be devided into air dry type and curing type. MHP is the typical curing type of water repellent finishing agent, and this type requires the curing temperature above $150^{\circ}C$ at least. High curing temperature is the very drawback of this curing type. For this reason, there has been global interest in the lowering of its temperature. The objective of this study is to investigate merits of alkali treatment for silicone finishing by ANOVA and LSD (least significant difference).

• 한국초전도ㆍ저온공학회논문지
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• 제7권3호
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• pp.9-12
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• 2005

[ $Y_1Ba_2Cu_3O_{7-8}$ ] (YBCO) coated conductor has been fabricated by batch-type process using oxide-precursor-based metal-organic deposition (MOD) method. The batch-type process can be scaled up more simply to Produce long-length YBCO conductor than the reel-to-reel process. Also, it has less handling problems and is adequate to the ambient gas environment. In this work, YBCO oride powder was used as a starting precursor for MOD method. After reel-to-reel dip coating process, me ter-long-buffered metal tape was wound around a cylinder and underwent calcination and annealing processes. Annealed YBCO films showed good c-axis alignment and dense surface morphology with no cracks, but exhibited very low critical current density of $10^5\;A/cm^2$.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.128-132
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• 2003

The increase of vehicles stagnations leads to the increasing attention to the way customers pay and a large number of projects on electronic cash system. Transport system is comprised of a number of advanced technologies, including information processing, communications, control, and electronics. Recently many research on a system which provides contact in order to protect driver's vehicle passage have been carried out. And some potential problems from that system are being reviewed by electronic cash system. In this papers, we suggest RF protocol developing technology using the concept of electronic cash. ATM electronic cash developing is consist of component of pre-developed coin throw, integration of component using its, and production of more requirement-satisfactory ITS solution. Result increase 15-40% pre-type vehicles stagnations. Especially, we expect this proposed concept would be well adapted to our national environments

• 전기전자학회논문지
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• 제22권2호
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• pp.484-487
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• 2018

5 MeV proton-irradiation with total dose of $10^{15}/cm^2$ was performed on AlGaN/GaN-on-Si high electron mobility transistors (HEMTs) with various gate metals including Ni, TaN, W, and TiN to investigate the degradation characteristics. The positive shift of pinch-off voltage and the reduction of on-current were observed from irradiated HEMTs regardless of a type of gate materials. Hall and transmission line measurements revealed the reduction of carrier mobility and sheet charge concentration due to displacement damage by proton irradiation. The shift of pinch-off voltage was dependent on Schottky barrier heights of gate metals. Gate leakage and capacitance-voltage characteristics did not show any significant degradation demonstrating the superior radiation hardness of Schottky gate contacts on GaN.