• Interdisciplinary Bio Central
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• 제1권1호
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• pp.1.1-1.5
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• 2009

Many organisms control their physiology and behavior in response to the local light environment, which is first perceived by photoreceptors that undergo light-dependent conformational changes. Phytochromes are one of the major photoreceptors in plants, controlling wide aspects of plant physiology by recognizing the light in red (R) and far-red (FR) spectra. Higher plants have two types of phytochromes; the photo-labile type I (phyA in Arabidopsis) and photo-stable type II (phyB-E in Arabidopsis). Phytochrome B (phyB), a member of the type II phytochromes in Arabidopsis, shows classical R and FR reversibility between the inter-convertible photoisomers, Pr and Pfr. Interestingly, the Pr and Pfr isomers show partitioning in the cytosol and nucleus, respectively. In the over 50 years since its discovery, it has been thought that the type II phytochromes only function to mediate R light. As described in the text, we have now discovered phyB has an active function in FR light. Even striking is that the R and FR light exert an opposite effect. Thus, FR light is not simply nullifying the R effect but has an opposing effect to R light. What is more interesting is that the phyB-mediated actions of FR and R light occur at different cellular compartment of the plant cell, cytosol and nucleus, respectively, which was proven through utilization of the cytosolic and nuclear-localized mutant versions of phyB. Our observations thus shoot down a major dogma in plant physiology and will be considered highly provocative in phytochrome function. We argue that it would make much more sense that plants utilize the two isoforms rather than only one form, to effectively monitor the changing environmental light information and to incorporate the information into their developmental programs.

• 한국콘텐츠학회논문지
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• 제18권3호
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• pp.472-485
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• 2018

본 연구는 용인시의 채무제로화 정책과정을 Kingdon의 다중흐름모형을 통해 분석하여 지방정부의 재정역량 강화 및 경쟁력 제고에 기여하고자 하였다. 용인시는 2012년 기준 약 8,000억원의 지방채무를 가지고 있었으나 2017년 초 채무상환을 완료하였다는 점에서 분석대상으로 선정하였다. 분석 결과 첫째, 정책문제의 흐름은 용인시의 채무지표에 대한 인식, 경전철사업의 실패 및 역북지구의 택지분양 실패이다. 둘째, 정치의 흐름은 새로운 지방자치단체장의 당선과 공무원 예산 삭감 등의 행정부 협조, 주민들의 협조로 볼 수 있다. 셋째, 정책대안의 흐름은 대규모 투자사업 축소, 유휴공유 재산 매각을 통한 세입확대 및 세수증대, 경전철 활성화 정책이다. 이러한 정책문제의 흐름, 정치흐름, 정책대안의 흐름이 독립적으로 흐르다가 부동산경기 활성화와 역북지구 매각이라는 정책의 창이 열리면서 경전철 활성화 등의 기타 정책적 요소와 결합하였다. 이 과정에서 긴축재정을 위한 관계기관 협상과 설득 등의 정책선도가의 역할이 크게 작용하였다. 이러한 정책의 산출물로써 용인시는 채무제로를 달성하게 되었다. 본 연구를 통해 지방재정 역량 제고를 위해서 정책선도가의 역할의 중요성 뿐만 아니라 행정부와 시민의 협조, 대형 투자사업 추진 검토체계 등의 제도적 보완이 필요함을 밝혔다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 추계학술대회 논문집
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• pp.32-39
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• 2000

It is hard for central and local government, constructor to decide an appropriate system any city, because there are many factors that must considered. So, we considered various factor such as capability, accessibility, usability, durability, serviceability, availability, reliability, dependability, maintainability, etc that used previous research and feasibility study. As more important factors, they should take into consideration prices, a possibility on whether or not technology is applicable for repairing or keeping the system, the localization rate, and all kinds of contracts, when deciding a system. We put in order factors and grouping for interested party. This article present almost factors that be used to decide light railway system, maybe these factor consideration will be helpful for system decider.

• 천문학회보
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• 제43권1호
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• pp.62.3-63
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• 2018

Trends of Type Ia supernova (SN Ia) luminosities with the properties of host galaxies are important to study the underlying physics for an SN progenitor system and explosion mechanism. In the YONSEI SN catalog, we have a sample of ~600 SN and host data in the wider redshift range, and two independent light-curve models, SALT2 and MLCS2k2. From this catalog, here we present that SNe Ia in low-mass, globally and locally star-forming environments are fainter than those in high-mass, globally and locally passive environments, after light-curve shape and color or extinction corrections. Our results are then compared to previous studies, and show consistent results.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2006년도 추계학술대회 논문집
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• pp.158-163
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• 2006

The study of this study is to suggest the advanced vision of LRT O&M through comparing the domestic and japanese. Currently local government attract a private capital to construct the LRT competitively. It was investigated the O&M field participation of Light Rail Transit by the Seoul metro which operates Seoul subway 1,2,3,4 lines at this time. But, according to the restricted operation experiences in domestic, Japanese companies which operates a Light Rail Transit in Japan were analysed using several statistics. It were compared with operation plan of domestic execution design phase of representative 4 lines. The analysis gives us some points in common and suggestions that are very important and prerequisite for advancing seoul metro into LRT O&M business.

• Bulletin of the Korean Chemical Society
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• 제20권9호
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• pp.1021-1025
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• 1999

Near-infrared (NIR) spectroscopy has been successfully utilized for the rapid identification of six typical petroleum products such as light straight-run (LSR), naphtha, kerosine, light gas oil (LGO), gasoline, and diesel. The spectral features of each product were reasonably differentiated in the NIR region, and the spectral differences provided enough qualitative spectral information for discrimination. For discrimination, principal component analysis (PCA) combined with Mahalanobis distance was used to identify each petroleum product from NIR spectra. The results showed that each product was accurately identified with an accuracy over 95%. Most noticeably, LSR, kerosine, gasoline, and diesel samples were predicted with identification accuracy of 99%. The overall results ensure that a portable NIR instrument combined with a multivariate qualitative discrimination method can be efficiently utilized for rapid and simple identification of petroleum products. This is especially important when local at-site measurements are necessary, such as accidental petroleum leakage and regulation of illegal product blending.

• Nuclear Engineering and Technology
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• 제53권7호
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• pp.2133-2150
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• 2021

In this work, Esfahan light water subcritical reactor (ELWSCR) is analysed using experimental and theoretical diagnostic methods. Important neutronic parameters of the system such as prompt neutron lifetime, delayed neutron fraction, prompt neutron decay constant, negative reactivity of the core, fuel and moderator temperature coefficient of reactivity, and overall and local void coefficient of reactivity are estimated. Also, neutron flux distribution, reflector saving, water level effect, and lattice pitch of the core including operating point of the facility are studied in details. Theoretical results are calculated by MCNPX and measurements are performed utilizing zero power reactor noise method. Detailed descriptions of the results are explained in the text.

• Current Optics and Photonics
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• 제5권2호
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• pp.134-140
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• 2021

In this paper, I introduce a novel design method of a high performance nanophotonic beam deflector providing broadband operation, large active tunability, and signal efficiency, simultaneously. By combining thermo-optically tunable vanadium dioxide nano-ridges and a metallic mirror, reconfigurable local optical phase of reflected diffraction beams can be engineered in a desired manner over broad bandwidth. The active metagrating deflectors are systematically designed for tunable deflection of reflection beams according to the thermal phase-change of vanadium dioxide nano-ridges. Moreover, by multiplexing the phase-change supercells, a robust design of actively tunable beam splitter is also verified numerically. It is expected that the proposed intuitive and simple design method would contribute to development of next-generation optical interconnects and spatial light modulators with high performances. The author also envisions that this study would be fruitful for modern holographic displays and three-dimensional depth sensing technologies.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 하계학술대회 논문집
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• pp.335-337
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• 2008

In this paper, an X-Y channel dimming light emitting diode (LED) backlight with temperature compensation for in LCD TVs is proposed. It shows local dimming effects such as reduced power consumption and high dynamic contrast ratio even with much less number of LED drivers than that of the conventional two-dimensional local dimming method. Moreover, the image distortion caused by temperature variation of LED block can be effectively compensated. The validity of the proposed dimming method is verified by simulation and experimental results based on a RGB-LED backlight of a 32-inch LCD TV.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.57.3-57
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• 2001

This paper introduces a system which offers the possibility to access remote CAN devices over the Internet as if they were local. The system consists of a local computer and the DSP server. The DSP is connected to a CAN bus with a DC motor and to a Internet simultaneously. The DSP board consists of a LAN controller and a CAN controller. It can convert to a protocol between CAN and Internet. The DSP board is not based on a personal computer. This board is profited a small and light system.