민속-영덕 노물리 어로요

이재곤,Lee, Jae-Gon 한국어촌어항협회 2005 어항어장 Vol.73 No.-

향유와 꽃향유의 향기성분 조성 비교

이재곤,곽재진,임홍빈,정재훈,Lee Jae-Gon,Kwang Jae-Jin,Lim Heung-Bin,Jeong Jae-Hoon 한국연초학회 2004 한국연초학회지 Vol.26 No.2

This study was conducted to investigate the composition of flavor components of Elsholtzia ciliata and Eisholtzia splendens in order to obtain basic informations for the application of tobacco and food industry. Flavor components extracted were divided into three fractions ; essential oil, absolute and oleoresin from E. ciliata and E. splendens. Essential oil was extracted by simultaneous steam distillation(SDE), absolute and oleoresin were extracted by $100\%$ n-hexane and $50\%$ ethanol, respectively. Yields of the essential oil, absolute and oleoresin fractions from E. ciliata were $0.34\%,\;11.34\%\;and\;15.24\%,$ and those from E. splendends were $0.28\%,\;12.45\%\;and\;9.95\%$, respectively. The major components of essential oil of E. ciliata were naginata ketone$(29.37\%)$, elsholtzia ketone$(14.37\%)$ and rosefuran$(11.76\%)$. The major components of essential oil of E. splendens were 2-cyclohexen-1-one$(26.81\%)$, elsholtzia ketone$(13.46\%)$ and naginata ketone$(5.26\%).$ The composition of flavor components showed a slight difference between essential oils of E. ciliata and E. splendens. The major components of absolute fraction from E. ciliata were linoleic acid$(12.07\%),$ palmitic acid$(10.46\%)$ and 2-cyclohexene-1-one$(5.39\%).$ And those from E. splendens were linoleic acid$(12.38\%),$ palmitic acid$(9.47\%)$ and naginata ketone$(8.86\%).$ Ethyl linoleolate was a major component in oleoresin of E. ciliata and E. splendens.

스마트 NUX용 고해상도 광각렌즈모듈 및 영상왜곡보정 설계

이재곤,강민구,김원규,이경택,Lee, Jae-Gon,Kang, Min-Goo,Kim, Won-Kyu,Lee, Kyung-Taek 한국전자통신학회 2012 한국전자통신학회 논문지 Vol.7 No.5

본 논문에서는 광각렌즈기반의 WDR(Wide Dynamic Range)인 2M(Mega)급 CMOS 이미지 센서를 통해 왜곡영상을 보정하는 카메라 모듈의 설계와 렌즈영상의 성능을 분석한다. 또한, 설계한 광각렌즈모듈의 광각렌즈($176^{\circ}$) 특성으로 인한 왜곡영상의 보정된 결과를 분석하였으며, 카메라 모듈의 스마트 NUX(Natural User eXprience) 활용방안을 제안하였다. In this paper, camera modules and lens's images were analyzed for the compensation of distortion image by wide angle lens based WDR(Wide Dynamic Range) with high resolution sensor(2-Mega CMOS Image sensor). Due to wide angle ($176^{\circ}$) of designed wide angle camera modules, the compensation result of distorted image was analyzed, and the application of these modules was proposed for smart NUX(Natural User eXprience).

열분해 조건에 의한 담배 성분과 첨가제의 열분해 특성

이재곤,장희진,곽재진,이동욱,이창국,Lee Jae Gon,Jang Hee Jin,Kwag Jae Jin,Lee Dong Wook,Lee Chang Gook 한국연초학회 2004 한국연초학회지 Vol.26 No.2

This study was conducted to evaluate the characterization of the pyrolysis products of tobacco constituents such as cellulose, lignin and tobacco additives. The pyrolysis condition was designed to simulate the pyrolysis/distillation zone$(200\~600^{\circ}C)$ and combustion zone$(700\~950^{\circ}C)$of burning com in the smoking cigarette. The pyrolysis products were determined by GC/MS after pyrolysis using Double-Shot pyrolyzer. In the case of cellulose and lignin, the number of pyrolysis product in the condition that simulate the pyrolysis/distillation zone was much more than the combustion zone simulating one. The major products of cellulose were levoglucosan, furfural, and 1, 6-anhydro-$\beta$-D-glucofuranose and that of lignin were phenol, 2-methoxy phenol, and 1, 2-dimethoxy benzene. In the case of tobacco additives such as 2, 6-dimethyl pyrazine, maltol, and piperonal, the pyrolysis products of these additives were evaporated from the pyrolyszer at least $96\%$ intactly. These results indicate that tobacco constituents such as cellulose and lignin were thermally degraded at the pyrolysis/distillation zone and thoroughly broke down at the combustion zone, but tobacco additives were intactly evaporated from burning com of smoking cigarette.

"HEBEI SPIRIT"호 기름오염사고 방제조치현황

이재곤,Lee, Jae-Gon 한국해안해양공학회 2008 해안과 해양 Vol.1 No.2

추출방법에 의한 아니스의 휘발성 성분 조성 비교

이재곤,권여주,장희진,곽재진,김옥찬,최영현 ( Jae Gon Lee,Young Ju Kown,Hee Jin Jang Jae Jin Kwag,Ok Chan Kim,Young Hyun Choi ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.2

Different isolation methods for the volatile components of Anise(Pimpinella anisum L.) are compared in terms of the difference of components obtained with each analytical procedure. These methods include headspace(purge & trap) sampling procedure, simultaneous distillation extraction(SDE), steam distillation and solvent extraction. Total 43 components were identified by comparing gas chromatography retention time and mass spectral data. Different isolation techniques result in compositionally different isolates. The headspace(purge & trap) sampling procedure was found to be the best method of choice for a qualitative analysis of the volatile components.

슬라이버의 압축특성에 관한 연구 -슬라이버 선밀도 변동계수의 측정-

이재곤,박일규,김종섭,강태진,Lee, Jae-Gon,Park, Il-Gyu,Kim, Jong-Seop,Gang, Tae-Jin 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.6

In order to develop the on-line measurement system of sliver linear density-variation, the authors made, by try-and-error method, a pneumatic micrometer device which is consisted of specially designed trumpet for passing the sliver-specimen and a back pressure tank with strain transducer. When several kinds of sliver were passed through the trumpet, the back pressure variation in the pressure tank were sensed. And the back pressure-variation data(experiment data) were recorded by X-Y plotter. The experimental data were compared with the data from Uster Evenness Tester for the same sliver specimen. It was founded that, by this comparison, the back pressure-variation data measured by this experiment were proportional to the sliver linear density variation only if the average value of back pressure-variations were proportional to the weight of sliver. The slight deviations between the data from Uster Evenness Tester and from this experiment are caused by the structural characteristics of constituent fibers in sliver specimen.

링 방적사의 기하학적 구조에 관한 연구

이재곤,강태진,박일규,Lee, Jae-Gon,Gang, Tae-Jin,Park, Il-Gyu 한국섬유공학회 1989 한국섬유공학회지 Vol.26 No.4

The geometrical parameters of spun yarn such as orientation angle, radial position of fiber and length of fiber were measured using the tracer fiber technique and correlations between them were investigated at five different numbers of twist of yarns, i.e., 420, 470, 570, 770, 970 tpm. Length of fiber(L) increased with the value of orientation angle($\theta$) of fiber. However, there were no correlation between length of fiber and radial position of fiber(r/R) as well as between orientation angle of fiber and radial position of fiber. Not only the orientation angle but also its relative frequency of fibers were measured using the tracer fiber technique. Their frequency curves were followed normal distribution and the shape of curves were shifted to higher orientation angle with number of twist of yarns. The mean value of orientation angle of fiber at each radial position showed an increase with the radial position of fiber. The initial tensile modulus of spun yarn determined experimentally showed lower value than theoretically determined for the yarns with low twist levels of 420, 470, 570 tpm. These results can be explained by the slippage between fibers.

평행 결합 Mushroom 구조를 이용한 대역 통과 여파기의 고조파 성분 억제

이재곤,이정해,Lee, Jae-Gon,Lee, Jeong-Hae 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.2

본 논문에서는 평행 결합 버섯 구조를 이용하여 대역 통과 필터의 고조파 성분을 제거하였다. Double positive(DPS)전송 선로인 마이크로스트립 라인과double negative(DNG)전송 선로인 버섯 구조 사이에서는 격리된 마이크로스트립 라인과 버섯 구조의 교차되는 분산 곡선 주파수 대역에서 강한 결합이 복소 전파 상수로 인해서 발생한다. 교차되는 분산 곡선 주파수에서 강한 결합으로 인하여 전파가 전파를 하지 못하기 때문에 이와 같은 구조는 대역 저지 필터로 이용할 수 있는 것이다. 제안된 대역 저지 필터는 공진기를 이용한 형태가 아니라 평행 결합 전송 선로를 이용하였기 때문에 넓은 대역폭을 가지고 DPS와 DNG 전송 선로 사이의 강한 결합으로 인해서 소형화에 유리하다는 장점을 가지고 있다. 본 논문에서는 중심 주파수 4 GHz, 3 dB fractional 대역폭은 40%인 평행 결합 대역 저지 필터를 설계하였고, 이를 두 가지 종류의 대역 통과 필터의 고조파 모드를 억제하는데 이용하였다. Harmonic band of bandpass filter(BPF) is suppressed using coupled mushroom structure. Between double positive (DPS) transmission line such as microstrip and double negative(DNG) transmission line such as one dimensional mushroom structure, strong coupling broadly arises in the cross range of dispersion curves of isolated microstrip and mushroom structure because of complex propagation constant in the cross range. Strong coupling inhibits wave propagation, so that this kind of structure can be utilized as bandstop filter(BSF). This BSF utilizes coupled transmission line instead of coupled resonator, resulting in broad bandwidth(>30 %), shan-rejection, and high rejection level. The strong coupling between DPS and DNG transmissionline makes it possible shorten coupling length, resulting in compact size. In this paper, parallel coupled BSF having center frequency of 4 GHz and 3 dB fractional bandwidth of 40 % is designed and utilized to suppressed spurious mode of two bandpass filters.

원로과학기술자의 증언(24)-통신위성 발사하는 그날을 기대

이재곤,Lee, Jae-Gon 한국과학기술단체총연합회 1981 과학과 기술 Vol.14 No.12