일차원과 이차원 Ka-대역 프린티드 다이폴 배열 안테나의 스캔 블라인드니스 분석

구한이,송성찬,남상욱 한국전자파학회 2019 한국전자파학회논문지 Vol.30 No.3

In this study, an active element pattern (AEP) of a printed dipole was analyzed in 1D and 2D arrays. First, an AEP of the printed dipole was obtained using the simulation in the 2D infinite array. The scan blindness in the 2D array occurred in the E-plane direction at around ±36°; however, it was barely observed in the 1D array. To analyze the cause of the scan blindness in the 2D array, the dispersion properties of a unit cell was obtained and compared with the scan blindness by frequency change. The difference between the scan blindness of the 1D and 2D arrays was clarified using the comparison of the Q value in the unit cell in the 1D and 2D arrays. Then, the coupling of the electric field in the E-plane direction was observed when nine elements were separated between the two ports in a linearly arranged dipole structure. Finally, the printed dipole array was fabricated, and an AEP was measured for the 11×1 and 11×3 sub arrays. The proposed theory was verified using these observations and by comparison with the simulation results.

빔 조향이 가능한 직사각형 루프 배열 안테나의 설계

구한이,한인희,김동석,김찬홍,박동철,Koo, Han-Ni,Han, In-Hee,Kim, Dong-Seok,Kim, Chan-Hong,Park, Dong-Chul 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.8

본 논문에서는 빔 조향이 가능한 직사각형 루프 배열 안테나를 설계하였다. 먼저 RWG 모멘트 법(RWG MoM: Rao Wilton Glisson Method of Moment)을 통해 안테나의 조향 소자 패턴을 이론적으로 고찰하였다. 다음, 상용 툴(tool)인 CST사의 MWS(Microwave Studio)를 이용하여 얻은 시뮬레이션 결과와 모멘트 법 결과를 비교하였다. $8{\times}5$ 부배열을 제작하고 측정하여 그 결과를 시뮬레이션 결과, 그리고 모멘트 법 결과와 비교함으로써 접근 방법의 타당성을 검증하였다. 제작된 $8{\times}5$ 부배열 안테나는 E-면에서 고각 방향으로의 ${\pm}45^{\circ}$ 빔 조향 범위 내에서 평탄한 이득 특성을 갖는 것을 확인하였다. In this paper, a rectangular loop array antenna for beam scanning is designed. A program using RWG MoM(Rao Wilton Glisson Method of Moment) is developed for SEP(Scan Element Pattern) theoretically. Simulation results obtained by using a commercial software tool, MWS are compared with the MoM results to confirm the validity of the program. Also these results are compared with the measured ones for the case of an $8{\times}5$ subarray. The fabricated $8{\times}5$ subarray showed a flat gain characteristic in the elevation scan range of ${\pm}45^{\circ}$ in the E-plane.

Burley종 담배의 품종별 재식밀도 및 시비량에 따른 주요 형질의 변화 제2보. 시비량에 따른 초형 변화

구한서 한국연초학회 1994 한국연초학회지 Vol.16 No.1

To investigate the factors of the improvement of cultivation methods according to the plant type, three Burley tobacco cultivars were done. Experiments on the variability of plant type and factors representing the productivity and quality of the cultivar were subsequently carried out in relation to different fertilizer levels. Results are summarized as below. Use of more fertilizer resulted in higher plant height and longer leaf length but smaller mean leaf inclination(MLI). The horizontal leaf area distribution became greater in parts distal to the stem and the vertical leaf area distribution became greater in lower half than in upper half as the amount of fertilizer applied was increased. Br. 49 was the largest but Br. 21 and NTN 77 were similar with respect to both CGR and NAR. The yield was greater in larger MLI cultivars. These three characteristics became greater when the tobacco were heavier in the cultivars of larger MLI and increased with higher amount of fertilizer. Harvest index became greater as the amount of fertilizer decreased but not significantly differ among the cultivars. Total nitrogen content and nitrate - form nitrogen content were greater, more amount of fertilizer, and larger MLI cultivar plots. Total nitrogen content was higher in upper leaves. The filling power of tobacco leaves decreased but combustibility of leaves showed not significant trend as fertilizer application level increased.

Burley종 담배의 품종별 재식밀도 및 시비량에 따른 주요 형질의 변화 제1 보. 재식밀도에 따른 초형 변화

구한서 한국연초학회 1994 한국연초학회지 Vol.16 No.1

Experiments on the variability of plant type and factors representing the productivity and quality of the cultivars were subsequently carried out in relation to different plant density. Results are summarized as below. The higher was the plant density, the greater was the plant height and mean leaf inclination(MLI). As the plant density increased, the horizontal leaf area distribution became greater in proximal to the stem in NTN 77 and Br.49 but evenly in distal part in Br.21. Meanwhile, in terms of vertical leaf area distribution, it was decreased much more in middle and lower leaves than in upper in NTN 77 and Br.49 although it steadily decreased in any part of the plant in Br.21. Br.49 was the largest but Br.21 and NTN 77 were similar with respect to both CGR and NAR. The yield was greater in larger MLI cultivars(NTN 77>Br.49>Br.21). These three characteristics became greater when the tobacco were planted more densely in the field. Dry leaf weight and dry matter weight per plant were heavier in the larger MLI and increased with lower plant density. Total nitrogen content was greater in lower plant density and larger MLI cultivar. The plant density increases filling power seems to be enhanced regardless to the plant type. There was no discernible tendency on combustibility according to the plant density or plant type.

영상에서의 구름 검출 및 제거를 위한 알고리즘

구한서(H. S. Koo),전병문(B. M. Jeon),정창성(C. S. Jeong) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.1B

본 논문에서는 구름을 포함하는 영상을 처리하여 구름이 제거된 개선된 영상을 얻음으로써 효율적으로 지상정보를 예측할 수 있는 기법을 제시한다. 구름 검출 알고리즘을 통해 구름으로 여겨지는 영역을 분리해 내고, 이 영역에 한해 Iterative 알고리즘을 적용하여 구름제거를 수행할 경우 보다 향상된 구름제거 성능을 기대할 수 있다. 우선 영상에서 구름을 효과적으로 검출하기 위해 luminance와 variance를 이용한 알고리즘과 개선된 Lim 방법을 iterative하게 적용하여 보다 향상된 결과를 얻을 수 있는 알고리즘을 제시하고 성능 비교를 한다.

한국과 미국의 재배환경 요인과 담배생육비교

具漢書,朴鉉錫,柳程根,張基運,李鎔得 韓國作物學會 1986 한국작물학회지 Vol.31 No.4

지역이 다른 기상환경 특히 재배환경 조건이 황색종 담배의 생육, 생산성 및 건엽의 품질에 미치는 영향을 구명하고 국내외 교차경작과 화학적 성분비교에 의한 한·미산 황색종 잎담배의 품질에 미치는 주요 요인을 조사하여 국내산 담배의 품질을 개선하고자 황색종 NC2326을 공시하여 재식밀도, 시비양, 재배형을 달리하여 시험한 결과를 요약하면 다음과 같다. 1. 토양성분중 유기물 함양은 거의 비슷하였고 유효인산함양은 Oxford가 상당히 높았으나 감기치환용량은 낮았다. 2. 삼요소중 103당 질소, 인산, 가리의 삼성분양은 수원이 Oxford보다 더 시용하고 있다. 3. 위도상으로 Oxford가 약간 낮으며 이식시기도 수원보다 늦다. 4. 월별 온도분포는 Oxford가 약간 높으며 생육과정중 강우양은 년중 Oxford가 1,070mm, 수원이 1,327mm로서 Oxford는 고르게 분포되어 있으나 수원은 성숙기에 집중 분포되어 있다. 5. 이식묘의 크기와 건물중은 Oxford가 높았다. 6. 초장, 최대엽의 엽장, 엽폭, 엽후, 중골비율은 수원보다 Oxford가 컸으며 무피복구가 피복구에 비해 컸다. 7. Nicotine함양은 수원이 높았으나 당함양은 낮았다. Nicotine과 당함양은 피복구에서 높았다. 8. 생육과정중 유기산함양은 수원이 높았으나 건엽에서 낮았으며, 무피복구에서 높았다. 지방산함양은 수원이 낮았으나 건엽에서 높았으며 무피복구가 높은 경향이었다. 9. 잎담배 정유성분중 43개 성분을 분리동정하였다. 수원이 낮은 경향이었으며 특히 피복구보다 무피복구가 상대적으로 높았다. 10. 향기성분신 Damascene, Damascennoe, Phrnethyl alcohol 및 Neophytadine 등은 한국이 높은 경향이나 Solanone과 Oxysolanone 등은 미국이 높은 경향이었다..7378*)과 유의적인 상관관계가 있었다. 8. 처리별 증발산양간에는 유의적인 차리가 없었으나, 투명비닐멀칭구가 다른 처리구에 비하여 높은 경향이었다.circC에서 22.5%, 10℃ 에서 2%가 각각 저하되어서 인삼의 광합성작용에는 광조건보다 고온조건이 아주 큰 영향을 미치는 것으로 보였다.e lower the gel temperature was in the epoxy system. In this study it is concluded that the curing of the silica filled epoxy system was found to be accelerated, as silica was added to the epoxy compound.ed by adults who are middle-aged or elderly. If altered colors are applied to the digital products as much as popular culture changes, it can assist the elderly with their weakened physical abilities.동위효소 사이의 특성을 나타냈고, 골격근과 눈 조직에서 피루브산에 대한 LDH의 친화력이 상당히 크므로 LDH가 혐기적 조건에서 효율적으로 기능을 하는 것으로 사료된다.5) and "Cleanliness of clothes & features" (p <0.05) of VIP ward were significantly higher than those of a general ward.tive to apply.아울러 고려(考慮)해야 한다. 이것은 고무기술자(技術者)가 당면(當面)해야할 과제(課題)에 속(屬)하며 바람직 한것은 본장(本章)의 내용(內容)이 여러 상황 To find main factors to affect tobacco culture and quality, NC 2326 (Nicotiana tabacum L.) was cultivated in Korea and in the United States under different plant density, fertilization, mulching and curing. Among the chemical characteristics of the both experimental soils, the organic matters were similar concentration in both locations but effective phosphorous contents were higher in Oxford in the United States. Plant height, length and width of the largest leaf, leaf thickness, and midrib ratios were larger in Oxford than in Suwon in Korea. Also they were larger in non mulching system than in mulching system. But the total numbers of the leaves were decreased in non mulching system. The content of nicotine was higher in the plant grown in Suwon than in Oxford. The concentrations of nicotine and sugar tend to increase in mulching system comparing of non mulching system. During the growing, the concentration of non-volatile organic acids was higher in Suwon, while it was lower in cured leaf produced in Suwon. Also the contents of total fatty acids were lower in the harvested leaf grown in Suwon, but not in cured tobacco. Forty three compounds identified among the volatile oils from these experimental samples were quantified. The concentrations of the major components related to the tobacco flavour such as damascone, damascenone, solanone, nor-solanadione, and megastigmatrienones were higher in the cured tobacco produced in Oxford rather than in Suwon.

生體磁氣經絡療法

구한서 한국정신과학학회 1997 韓國精神科學學會誌 Vol.1 No.1

필자가 발명한 자기경각조절기를 이용하여 기가 흐르는 통로인 음양장부의 경작을 조절하여 부조화 된 오장육부의 기능을 조화롭게 해 줌으로써 병을 예방, 치료하고 또 동양의학의 정수인 오운육기 철학을 입증하고자 한다.

생체 자기경락 요법

구한서 한국정신과학학회 1995 한국정신과학회 학술대회 논문집 Vol.2 No.-

生體磁氣經絡療法

구한서 圓光大學校 行政大學院 1996 最高政策管理論集 Vol.9 No.-

일장 및 온도처리가 관상용 Nicotiana species의 개화에 미치는 영향

구한서,김정환,이용득,Koo, Han-Seo,Kim, Chung-Whan,Lee, Young-Deuk 한국연초학회 1989 한국연초학회지 Vol.11 No.2

Several growth characteristics of two ornamental tobacco species, Nicotiana sanderae and N. affinis, were investigated in this study. Also effect of temperature and daylength on the flowering of the tobacco plants were evaluated to obtain basic information on breeding and cultivation. 1. The plants were great in high temperature-long day at the early stage and in low temperature-short day at the late stage of plant growth, for both Nicotana species. At the early growth stage the leaf length N. sanderae was great in high temperature-long day, and that of N. affinis was great in high temperature-short day period, while at the late stage of the plant growth the leaf lengths were more significantly effected by the temperature rather than daylength. Leaf width and leaf shape index were less sensitive to the conditions. 2. For both of the species, the total number of tobacco leaves not much influenced by the temperature and daylength. 3. There were no significant differences for budding and flowering period between the two species, both of which were sensitive to temperature and daylength with more influence by daylength than temperature. 4. Number of floral stalks, number of flower and flowering period were not much influenced by temperature and daylength; however, N. affinis had 2 more floral stalks, 31 more flowers, and 6 day longer flowering period than N. sanderae.