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Donor-Acceptor 발색단과 디케토피롤로피롤(DPP) 유도체에 관한 연구
김헌수(HunSoo Kim),김승회(SeungHoi Kim),박수열(SooYoul Park) 한국트라이볼로지학회 2016 한국윤활학회지(윤활학회지) Vol.32 No.5
The diketopyrrolopyrrole (DPP) pigment is a bicyclic 8-π-electron system containing two lactam units. Typical DPP derivative pigments have melting points of over 350℃ and very low solubility in most solvents, and show absorption in the visible region with a molar extinction coefficient of 33,000 dm²mol<SUP>-1</SUP> and strong photoluminescence with maxima in the range 500–600 nm. X-ray structure analyses of DPP show that the whole molecule is almost in one plane. The phenyl rings are twisted out of the heterocyclic plane and the intermolecular hydrogen bonding between neighboring lactam NH and carbonyl units influences the structure of the DPP pigment in the solid state. In this study, mono-N-alkylation and mono-N-arylation were undertaken for Pigment Red 264 or Pigment Orange 73 with alkyl halide and aryl halide, respectively, in the presence of sodium tert-butoxide as a base catalyst to improve the solubility of DPP pigments and their application as CO₂ indicators. The synthetic yield was in the range 11–88%. The indicator dyes are highly soluble in organic solvents and shows pHdependent absorption (λmax 501 and 572 nm for the protonated and deprotonated forms, respectively) and emission (λmax 524 and 605 nm for the protonated and deprotonated forms, respectively) spectra. The mono-Nalkylated and mono-N-arylated DPP pigment was identified by ¹H-NMR (¹H-Nuclear Magnetic Resonance Spectrometer), FT-IR (Fourier Transform Infrared Spectroscopy), and MS (Mass Spectrometry). According to the results of color and hue properties obtained by a color matching analyzer, the synthesized DPP pigment material can be used as a CO₂ indicator.
김재환(Jae-Hwan Kim),정용운(Yong Wun Jung),문경찬(Gyeong Chan Moon),박수열(Sooyoul Park),김명효(Myeonghyo Kim) 한국추진공학회 2017 한국추진공학회 학술대회논문집 Vol.2017 No.5
소형민수헬기(LCH, Light Civil Helicopter) 개발사업을 통해 개발된 엔진은 민수 인증(형식 증명) 획득 후 소형무장헬기(LAH, Light Armed Helicopter)용으로 활용될 예정이다. 따라서 민수 인증 엔진의 군용 엔진 적용의 적합성 분석을 위한 기초자료로의 활용을 위해 미연방항공청(FAA)의 형식 증명 규격 FAR Part 33과 유럽항공안전기구(EASA)의 CS-E를 비교 분석하였다. 이 분석 자료는 향후 군용 항공기 추진 시스템의 감항성 입증을 위해 필요한 민수 엔진 형식 증명 기준 적합성 입증 자료의 추적성 분석을 위해 사용되었다. An comparative analysis between two engine type certification specifications which are FAR Part 33 and EASA CS-E has been performed to provide fundamental information for validity assessment of civil certified engine when it is installed to a military rotorcraft. The analysis result has been used to build a traceability information between CS-E and MIL-HDBK-516C by which the substantiation data for engine type certification can be used as parts of aircraft propulsion system airworthiness substantiation.
김재환(Jae-Hwan Kim),이경재(Kyungjae Lee),문경찬(Gyeong Chan Moon),박수열(Sooyoul Park),김명효(Myeonghyo Kim) 한국추진공학회 2018 한국추진공학회 학술대회논문집 Vol.2018 No.5
소형민수헬기(LCH, Light Civil Helicopter) 개발사업을 통해 개발된 엔진은 민수 인증(형식 증명) 획득 후 소형무장헬기(LAH, Light Armed Helicopter)용으로 활용될 예정이다. 따라서 형식 증명된 민수 엔진의 군용 항공기 적용 적합성 입증을 위해 추가적인 요구도와 입증이 필요한 지에 대한 분석은 매우 중요하다. 본 연구에서는 이를 위한 기초자료 제공을 위해 군용 엔진 개발기준인 미 국방성의 합동운용규격지침서(JSSG-2007)와 민수엔진 형식 증명 기준인 EASA의 CS-E를 비교 분석하여 민/군 규격의 차이점(특히 엔진 운용 환경 조건)을 분석하고 향후 추가적 입증 여부 분석을 위한 기초자료를 제시하였다. An comparative analysis between military and civil airworthiness certification specification for aeroengine has been performed to provide basic information to specify additional substantiation activities, if any, to show compliance of a type certified civil engine to airworthiness criteria of a military rotorcraft. The military and civil airworthiness certification specification of aeroengine is JSSG-2007 by DOD and CS-E by EASA, respectively. Special attention has been paid to environmental conditions such as atmospheric conditions, ingestion capabilities and E3.
Development of Wave Overtopping–Overflow Transition Model Based on Full-scale Experiments
Hajime Mase,Sooyoul Kim,Makoto Hasegawa,Jae-Hoon Jeong,윤종성 한국해양공학회 2020 韓國海洋工學會誌 Vol.34 No.2
When high waves and storm surge strike simultaneously, the characteristics of the fluid field change drastically from overtopping according to the wave runup height to overflow through a transition state that combines overtopping and overflows. However, an estimation model or evaluation method has not yet been established because there is not enough engineering data. This study developed a wave overtopping-overflow transition model based on a full-scale experiment involving wave overtopping and overflow transition, which appropriately reproduced the effect of waves or the temporal change in inundation flow. Using this model to perform a calculation for the wave overtopping and overflow transition process under typical circumstances, this study determined the wave runup height and features of the inundation flow under time series changes as an example.