• Journal of Sericultural and Entomological Science
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• v.29 no.1
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• pp.64-68
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• 1987

견에 대한 비닐단량체의 증량가공에 있어서 메타크릴아마이드(metacrylamide) 크라프트 가공견의 판별 방법을 확립하기 위하여 가공견에 대한 정성분석과 미세구조를 관찰한 결과 가공견의 용해성 및 실소함유량은 미가공견에 비하여 저하되었으며 IR-Spectra도 파장 1385cm-1, 1210cm-1에서 미가공견과 다른 흡수 peak를 보였고 가공견의 pyrogram은 메타크릴아마이드의 세분해로 미가공견에서는 나타나지 않은 또 다른 peak를 보였다. 또한 가공견의 표면미세구조는 미가공견에 비하여 fibril이 팽대하여져 거친 면을 보였다.

• The Optical Journal
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• s.107
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• pp.25-29
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• 2007

초정밀 가공기술은 선진국에서 기술이전을 회피하는 가장 심한 분야로 광산업의 핵심부품인 반사경, 비구면 렌즈, 광통신매체의 가공과 관련하여 국내의 초정밀 관련 기술의 한계에 의하여 전적으로 수입에 의존하고 있다. 이에 한국기초과학지원연구원은 2005년부터 기존의 측정분석위주의 단순지원에서 국가적 수요에 대응하는 대형첨단연구장비의 국산화를 위한 기술개발에 역점을 두고 있다. 이를 위한 기반기술로써 초정밀 가공 및 측정장비의 설치운영을 통한 첨단 연구장비의 핵심부품을 개발하고 있다. 특히 천문관측용 적외선(IR) 광학계의 초정밀가공기술 개발을 통한 항공우주용 광학계의 국산화 기술 향상에 기여하고 있다.

• The Optical Journal
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• s.111
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• pp.29-31
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• 2007

한국기초과학지원연구원(www.kbsi.re.kr/upel) 초정밀가공팀(팀장.김건희)에서는 2005년부터 기존의 측정분석위주의 단순지원에서 국가적 수요에 대응하는 대형첨단연구장비의 국산화를 위한 기술개발에 역점을 두고 있다. 이를 위한 기반기술로써 초정밀 가공 및 측정 장비의 설치운영을 통한 첨단연구장비의 핵심부품을 개발하고 있다. 특히 천문관측용 적외선(IR) 광학계의 초정밀가공기술 개발을 통한 항공우주용광학계의 국산화 기술 향상에 기여하고 있다.

• Archives of Pharmacal Research
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• v.29 no.1
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• pp.46-49
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• 2006

In this study, 2-N-arylimino-2,3-dihydro-1,3,4-thiadiazoles derivatives (6a-h) were synthetized. The mechanism of the studied reactions was discussed. The chemical structures of the compounds were elucidated by their IR, $^1H-NMR,\;^{13}C-NMR$, and Mass spectral data and elemental analyses. The compounds were tested for antimicrobial activity using diffusion agar technique.

• Journal of the Korean Ceramic Society
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• v.29 no.8
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• pp.593-600
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• 1992

Through sol-gel processing, Inorganic-organic composite was obtained. The influence of water content used in hydrolysis on the bonding state, microstructure, strength, and elongation into IR, NMR, Tg, etc. As the water content was increased, the bonds between inorganic Si-(OH) and organic Si-(OH) increased, and relatively denser microstructure was formed. Tensile strength and elongation decreased with amount of water content.

• Bulletin of the Korean Chemical Society
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• v.16 no.1
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• pp.26-29
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• 1995

Six-coordinate molybdenum(Ⅴ)-oxo complexes (PyH)[MoOCl2L] and (R4N)-[MoOCl2L] (R=CH3 and C2H5) with N-salicylidene-2-aminophenol(L1) and its derivatives(L2=5-CH3, L3=3-CH3O, L4=5,6-C4H4 and L5=5-NO2) as ONO-donor ligands have been synthesized and the spectral and electrochemical properties of the complexes by elemental analysis, molar conductivity, UV-vis, IR, 1H NMR and CV have been studied.

• Korean Journal of Optics and Photonics
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• v.29 no.3
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• pp.110-118
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• 2018

We have designed a mid-infrared optical system for an airborne electro-optical targeting system. The mid-IR optical system is a dual-field-of-view (FOV) optics for an airborne electro-optical targeting system. The optics consists of a beam-reducer, a zoom lens group, a relay lens group, a cold stop conjugation optics, and an IR detector. The IR detector is an f/5.3 cooled detector with a resolution of $1280{\times}1024$ square pixels, with a pixel size of $15{\times}15{\mu}m$. The optics provides two stepwise FOVs ($1.50^{\circ}{\times}1.20^{\circ}$ and $5.40^{\circ}{\times}4.23^{\circ}$) by the insertion of two lenses into the zoom lens group. The IR optical system was designed in such a way that the working f-number (f/5.3) of the cold stop internally provided by the IR detector is maintained over the entire FOV when changing the zoom. We performed two analyses to investigate thermal effects on the image quality: athermalization analysis and Narcissus analysis. Athermalization analysis investigated the image focus shift and residual high-order wavefront aberrations as the working temperature changes from $-55^{\circ}C$ to $50^{\circ}C$. We first identified the best compensator for the thermal focus drift, using the Zernike polynomial decomposition method. With the selected compensator, the optics was shown to maintain the on-axis MTF at the Nyquist frequency of the detector over 10%, throughout the temperature range. Narcissus analysis investigated the existence of the thermal ghost images of the cold detector formed by the optics itself, which is quantified by the Narcissus Induced Temperature Difference (NITD). The reported design was shown to have an NITD of less than $1.5^{\circ}C$.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.1
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• pp.65-70
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• 1994

GaAs power MESFETs with 0.8$\mu$m gate lengths are fabricated using image reversal (IR) methods on the wafer with an undoped surface layer grown by MOCVD. The fabricated GaAs power MESFETs with an undoped surface layer show that an ideality factor 1.17, a built-in potential 0.83 V, a pinch-off voltage -2.7 V, a specfic contact resistance 1.21$\times$10$^{5}$ ~3.42$\times$10$^{2}$$\Omega$-cm$^{2}$ and an extrinsic g$_{m}$ = 103.5 mS/mm. The maximum RF output power densities of the 0.8$\mu$m devices are 360 mW/mm and 499 mW/mm, and power added efficiencies 29.67% and 29.05%, for the unit gate width 150$\mu$m and 200$\mu$m at 12 GHz.

• Bulletin of the Korean Chemical Society
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• v.29 no.1
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• pp.187-190
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• 2008

The synthesis of a novel N,C,N-type pincer, bis(N-aryl)-2-bromoisophthalaldimine 2,6-(2,6-Et2PhN = CH)2C6H3Br (1) and Ni(1)Br (2) is described. They were characterized by elemental analysis and spectroscopic techniques (IR and 1H NMR). Attempted ethylene polymerization catalyzed by 2 has been futile, leading only to the formation of a small amount of oily oligomers.

• Bulletin of the Korean Chemical Society
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• v.29 no.10
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• pp.1887-1892
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• 2008

Novel poly(aspartic acid) derivatives conjugated with L-lysine moieties and their amphiphilic analogs were synthesized and characterized. The chemical structures of these polymers were confirmed using FT-IR and $^1HNMR$ spectroscopy. The physicochemical properties of amphiphilic copolymers were characterized using an electrophonetic light scattering spectrophotometer (ELS) and transmission electron microscopy (TEM). These results indicated a stable nanoparticle formation within aqueous media. These polymers have potential applications in the pharmaceutical and cosmetic fields as delivery vehicles for bioactive molecules.