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      • KCI등재

        Double Negative, Positive 전승 선로를 이용한 대칭적적인 주파수 스캐닝 누설파 안테나

        이재곤,이정해 한국전자파학회 2004 한국전자파학회논문지 Vol.15 No.11

        본 논문에서는 직렬 inter-digital 커패시터와 이중 병렬 인덕티브 쇼트 스텁으로 구성된 double negative(DNG) 전송 선로를 설계하였다. 이러한 DNG 전송 선로는 특정한 주파수 이상에서는 double positive(DPS) 전송 선로의 특성을 가진다. 다시 말해서, 설계된 전송 선로는 DNG와DPS전송 선로의 특성을 주파수에 따라서 동시에 가진다. 누설파 대역에서의 DPS/DNG 전송 선로는 주파수 스캐닝 안테나로 이용되어 질 수 있다. 대칭 누설파 안테나의 분산 특성과 원거리 방사 패턴을 모의실험하였고 제작 및 측정하였다. 모의실험 결과는 측정결과와 대략 일치하였다. In this paper, we have designed artificial double negative(DNG) transmission line composed of series inter-digital capacitor and two shunt inductive short stubs. This artificial DNG transmission line has the property of double positive (DPS) transmission line over some frequency ranges due to RF nature. In detail, this transmission line simultaneously has the contrary properties of DNG and DPS transmission line depending on operation frequency. DPS/DNG transmission line at leaky region is utilized to design frequency scanning antenna with backfire-to-endfire. We have simulated and measured the dispersion and for-field radiation beam patterns of symmetrical leaky wave antenna. The results show rough agreement.

      • 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.

      • 멘솔 첨가방법이 제품담배의 멘솔 전이형태에 미치는 영향

        이재곤,장희진,권효진,곽재진,이동욱 한국연초학회 2001 한국연초학회지 Vol.23 No.1

        This study was conducted to determine menthol migration from the tobacco to the filter and the change in percentage of menthol in pack for different mentholated cigarettes. Methanol was used to extract menthol from tobacco, filter and foil. A known weight of internal standard was added to each extract and then the extracts were analyzed by gas chromatography. After 4 days, 95% of the menthol applied to the foil was delivered into the tobacco and filter, but in case of menthol applied to the tobacco, the percentage of menthol that migrated from the tobacco to the filter was below 10%. After 100 days, 30-45% of the menthol in the tobacco had migrated into the filter. The amount of menthol in the pack decreased after 20 days of storage, however, the remaining menthol in cigarette treated with 0.30% propylene glycol was higher in amount than that with 0.12% propylene glycol In analysis on menthol transfer to mainstream smoke, the most efficient sample was the cigarette with menthol applied to the foil rather than to the tobacco.

      • Remote PECVD SiO$_{2}$ 를 이용한 InSb MIS 소자의 특성

        이재곤,최시영 대한전자공학회 1996 전자공학회논문지-A Vol.33 No.12

        InSb MIS devices prepared by remote PECVD SiO$_{2}$ were fabricated. The SiO$_{2}$ films on InSb were deposited at atemperature range of 67~190$^{\circ}$C. The effects of deposition temperature on the structural characteristics of the SiO$_{2}$ films evaluated Auger electron spectroscopy showed that atomic raito of silicon to oxygen was 0.5 and composition toms were distributed uniformaly throuout the oxide film. The transition region is about 100$\AA$ for SiO$_{2}$/InSb interface. The leakage current density at 1MV/cm and the breakdownelectric field of the MiS device using SiO$_{2}$ film deposited at 105$^{\circ}$C were about 22 nA/cm$^{2}$ and 3.5MV/cm, respectively. The interface-state density at mid-bandgap extracted from 1 MHz high frequency C-V measurement was about 2X10$^{11}$ cm$^{-2}$eV$^{-1}$.

      • KCI등재후보
      • 리조트 속성중요도에 관한 연구

        이주형,이재곤 문화관광연구학회 1999 문화관광연구 Vol.1 No.1

        ABSTRACTThe purpose of this study is to examine the importance of attributes in resorts and to help the managers of resort in marketing, management and sales promotion in such a competitive situation of the resort industry for member/non-member.This study adapted and modified components of a number of previously tests and validated research instruments to make the hypotheses of test. This exploratory study surveyed a random sample of 1,000 resorts tourists. After follow-up procedures were applied, responses rate of 85 percent was achieved. However, useable responses 812 of the 856 questionnaires.Findings generally indicate that through the classification of member/non-member and preferential importance-satisfaction group, each group make an assumption to understand the keynote of vital statistics and the difference of utilization circumstantial variable and a variable in the interrelation, and through the verification, they try to get useful information in the search of management strategy. In the interrelation of importance of attribute by the member/non-member tries to authorize to understand the difference between any other attributes and it.Therefor, this study presented the reform measures of management as follows. First, the vital statistical trait and utilization circumstantial variable to the product and service, institution and surroundings, promotion, scenery constitution., and regional traffic means and price should be deliberated to get rid of importance of attribute. Second, the employee and equipment of service should be developed to reinforce the customer service. Third, it is necessary to develop the new products and provide the new experience and atmosphere for tourists. Forth, the marketers have to classify the tourist into a high-demand season and a low-demand season. Fifth, there is a need to apply a competitive price strategy non-member. In other words, marketer should solve a pricing problem in dealing with non-member showing a meaningful difference, and provide service and low price in using utilities to keep star resort position.The tourist behavior in choosing resort facilities should be continued studying theoretically for managers or marketer in the resort industry.

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