• Weed & Turfgrass Science
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• v.4 no.4
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• pp.288-294
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• 2015

This study was conducted to investigate efficient adjuvants to increase herbicidal efficacy of metabolites from Streptpmyces scopuliridis KR-001. Commonly used 21 adjuvants mixed with the metabolites were applied to eight weed species (six grass weeds and two broadleaved weeds). Based on the visual evaluation, two adjuvants, LE7 (Polyoxyethylene lauryl ether) and EP4C (Sodium bis (2-ethylhexyl) sulfosuccinate), were selected as most efficient adjuvants to elevate herbicidal efficacy of the metabolites. Higher efficacy in the LE7 and EP4C was obtained when overall spray volume was $2,000L\;ha^{-1}(65{\mu}g\;a.i.\;ml^{-1})$ than $1,000L\;ha^{-1}(130{\mu}g\;a.i.\;ml^{-1})$. Field study demonstrated that $1,300{\mu}g\;ml^{-1}$ of metabolites from KR-001 applied with EP4C at concentration of $2{\mu}g\;ml^{-1}$ provided a highly effective post-emergence weed control which was almost equivalent to the glufosinate-ammonium at $540g\;a.i.\;ha^{-1}$. On the basis of these results, combination and multiple application methods could be developed to enhance herbicidal efficacy of metabolites from KR-001.

• Journal of Plant Biotechnology
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• v.41 no.2
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• pp.89-93
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• 2014

Long-term subcultured rose embryogenic calluses, which had been maintained for more than 5 to 6 years since the first embryogenesis from calluses induced from in vitro roots of rose, were identified as potential material for the development of transgenic plants. The first embryogenic calluses from 'Sweet Yellow' and two breeding lines (KR056002 and KR056006) were obtained in 2007 and 2009, respectively. Subsequently, we found that plants regenerated from long-term embryogenic calluses (LEC). Whereas the LEC from 'Sweet Yellow' takes 3 to 4 months to regenerate plants, those of the two breeding lines take 4 to 5 months. This period of time is the same as that taken for plants to regenerate from the first embryogenic callus. New embryogenesis was observed from atypical bodies (ABs) that appeared during the process of long-term subculture. We found that it is possible to use the AB as a material for new embryogenesis.

• Korean Journal of Optics and Photonics
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• v.4 no.1
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• pp.15-21
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• 1993

This paper describes the design and development of a KrF excimer laser stepper and discusses the detailed system parameters and characterization data obtained from the performance test. We have developed a deep UV step-and-repeat system, operating at 248 nm, by retrofitting a commercial modules such as KrF excimer laser, precision wafer stage and fused silica illumination and 5X projection optics of numerical aperture 0.42. What we have developed, to the basic structure, are wafer alignment optics, reticle alignment system, autofocusing/leveling mechanisms and environment chamber. Finally, all these subsystem were integrated under the control of microprocessor-based controllers and computer. The wafer alignment system comprises the OFF-AXIS and the TTL alignment. The OFF-AXIS alignment system was realized with two kinds of optics. One is the magnification system with the image processing technique and the other is He-Ne laser diffraction type system using the alignment grating on the wafer. 'The TTL alignment system employs a dual beam inteferometric method, which takes advantages of higher diffraction efficiency compared with other TTL type alignment systems. As the results, alignment accuracy for OFF-AXIS and TTL alignment system were obtained within 0.1 $\mu\textrm{m}$/ 3 $\sigma$ for the various substrate on the wafers. The wafer focusing and leveling system is modified version of the conventional systems using position sensitive detectors (PSD). This type of detection method showed focusing and leveling accuracies of about $\pm$ 0.1 $\mu\textrm{m}$ and $\pm$ 0.5 arcsec, respectively. From the CD measurement, we obtained 0.4 $\mu\textrm{m}$ resolution features over the full field with routine use, and 0.3 $\mu\textrm{m}$ resolution was attainable under more strict conditions.

• Korean Journal of Food Science and Technology
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• v.46 no.5
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• pp.544-548
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• 2014

This study was conducted to investigate the nutritional components and quality characteristics of the root of Allium hookeri grown in Korea and Myanmar. The root of A. hookeri grown in Hadong, Korea (KR), contained higher levels of carbohydrate, crude ash, and crude lipid, but the root of A. hookeri grown in Shan, Myanmar (MR), contained higher levels of crude protein and crude fiber. The free sugar and organic acid contents were higher in KR than in MR. Fructose, glucose, and sucrose were the major free sugars and arginine was the major free amino acid. KR contained higher amounts of essential amino acids, non-essential amino acids, ${\gamma}$-amino butyric acid, and citrulline than MR. Potassium was a prominent mineral constituent in both KR and MR, and KR contained higher mineral content than MR. KR contained twice the amount of sulfur and crude saponin, relative to MR.

• Journal of the Korean Ceramic Society
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• v.29 no.12
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• pp.949-955
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• 1992

R-curves, fracture resistance (KR) as a function of crack extension (Δa), of a gas-pressure sintered monolithic Si3N4 were determined by controlled flaw/strength technique. Rising R-curve behavior was observed, confirming the operation of microstructural toughening process during crack growth. The R-curve parameters, k and m in the equation, KR=k(Δa)m, were determined to 30.301 and 0.1146, respectively. Microstructural observation of growing crack revealed that the bridging in the crack wake by unbroken ligament of large elongated ${\beta}$-grains was the mechanism primarily for the rising R-curve behavior.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1481_1482
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• 2009

Pure Xe, Kr and Ne atoms and Mixures of Xe-Ne used in fluorescent induction lamps(FILs). However standard regulation of FILs is not made up until now. Therefore, the electron transport coefficients, the electron drift velocity W, the longitudinal diffusion coefficient NDL and the ionization coefficient $\alpha$/N in pure Xe, Kr, Ne gases and Xe-Ne mixtures(1:9, 5:5, 7:3) were calculated over the wide E/N range from 0.01 to 500 Td at 1 Torr by two-term approximation of the Boltzman equation.

• TTA Journal
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• s.70
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• pp.206-211
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• 2000

우리 협회(TTA)에서 $\ulcorner$제4판 정보통신용어사전$\lrcorner$발간(2000년 예정)을 위해 수집된 신규용어를 일부 발췌, 본 면에 정기적으로 수록함으로써 일반인들의 정보통신에 관한 이해를 돕고자 합니다. 또한 TTA 홈페이지(http://www.tta.or.kr)를 방문하시면 $\ulcorner$제3판 정보통신용어사전$\lrcorner$, 제3판 이후의 신규 수집 용어, 주요 표준화 용어 등의 서비스를 활용하실 수 있습니다. 아래 게재된 용어들에 대하여 의견이 있으시거나 신규용어를 제안하시고자 하는 분은 아래의 연락처로 문의해 주시기 바랍니다. 전화 (02)723-7084, 723-7094 담당 : 문정임/E-mail:jimun@tta.or.kr

• 프린팅코리아
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• s.26
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• pp.82-87
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• 2004

"카피와 프린트 문화를 올바르게 보급함과 동시에 회원사들의 권익을 보호하고 대변하는 단체로 거듭나는 것이 협회의 가장 큰 목적입니다." 백국인(48) 카피엔프린팅협회(www.cnp.or.kr, 이하 협회)회장은 협회의 존립 목적에 대해 궁극적으로는 저작.출판권의 존중이라고 강조한다. 또한 회원사뿐만 아니라 업계의 공동 발전을도모하는 공동체라고 말한다. 백 회장은 우수한 성능의 C&P호가 정박하기 좋은 항구를 찾기 위해서는 무엇보다도 결속력이 중요하다고 말했다. 1989년에 설립된 한학문화(www.hanhak.co.kr) 대표이사로 재임중인 백 회장의 고향은 경북 상주. 지난해 서대문 경제인상과 서울상공회 회장상을 수상한 바 있으며 이화여대 장학회 이사로 활동중이다. 재임 기간 1년여의 소회와 향후 계획에 대해 들어본다.

• Proceedings of the Korean Information Science Society Conference
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• 2010.06a
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• pp.319-320
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• 2010

• Proceedings of the Optical Society of Korea Conference
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• 1995.06a
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• pp.68-74
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• 1995

한국전자통신연구소에서 개발된 바 있는 KrF 엑시머 레이저 스탭퍼의 개발 과정과 그 결과를 보이고, 동시에 현재 개발중인 ArF 엑시머 레이저 스텝퍼의 진행상황을 보고한다. 본 논문에서는 스탭퍼의 주요 구성요소인 조명계, 투영광학계, 웨이퍼 자동초점 및 자동정렬 시스템을 중심으로 설명하여, KrF와 ArF 에시머 레이저 스탭퍼간의 차이점과 그 특성들을 상호 비교한다.