평면형 구조에 적합한 3-way 전력 분배기 설계

김현태,김귀수,류대원,임종식,안달,Kim, Hyun-Tai,Kim, Kwi-Soo,Yoo, Dae-Woun,Lim, Jong-Sik,Ahn, Dal 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.1

본 논문에서는 출력단 전력의 위상과 크기가 모두 대칭인 새로운 구조의 3-way 전력 분배기를 제안한다. 종래의 일반적인 Wilkinson 전력 분배기의 경우, 3-way 이상의 전력 분배시 격리 특성을 결정하는 저항 소자의 crossover로 인하여 평면형 구조로의 구현이 어려웠다. 반면, 본 논문에서 제안하는 회로는 평면형이면서 격리 저항을 쉽게 장착할 수 있는 장점을 가지고 있다. 그리고 대칭 구조이면서 선로 간 전기적 길이가 동일하므로 출력단 위상차를 위한 별도의 보상 선로가 불필요하다. 제작된 2.4 GHz 대 3-way 전력 분배기는 종래의 구조에 비하여 160% 만큼 개선된 $S_{11}$ 대역폭, 최하22.4 dB의 격리 특성, 그리고 출력 단자간 동일한 위상 특성을 보인다. This paper presents an equal 3-way planar-type power divider. In conventional 3-way Wilkinson dividers, it has been difficult to realize the circuit because of the crossover of isolation resistors. In the proposed divider, the isolation resistors can be easily attached to the planar structure of the divider. In addition, no phase difference is observed at output ports without extra line compensation because of its symmetric structure. The fabricated 3-way divider has a greatly improved bandwidth by 160 % in $S_{11}$, 22.4 dB, min of isolation, and in phase characteristics between output ports at 2.4 GHz of center frequency from measurement.

古典醫書 중 導引氣功法에 관한 文獻 硏究

김현태(Kim Hyun-tai),한창현(Han Chang-hyun),이상남(Lee Sang-nam),권영규(Kwon Young-kyu),안상우(Ahn Sang-woo),박지하(Park Ji-ha) 대한한의학원전학회 2009 대한한의학원전학회지 Vol.22 No.3

Objectives : Because of emphasizing a side of preventive medicine in the oriental medicine, an interest in Doinqigong(導引氣功: Physical and breathing exercise) has been elated recently. But, it has a limited sphere of application in the present south korea. Therefore we would like to bring out its sphere of application and detailed method in the oriental medicine classics. Method : We have researched theory and method of Doinqigong in the Junghwauijeon(中華醫典: Oriental medicine classic collections) DB according to below the procedure. (1) Making a related words list: We have used existing study of Doinqigong to make a list. It has been connected with Doinqigong. It includes not only technical terms, but also general terms. (2) Searching sentence: We have searched sentence that contain terms related with Doinqigong in the Junghwaeujeon DB. (3) Analysis of related sentence: We have searched and classified sentence by theory and method. Conclusions : (1) The total number of oriental medicine classics connected with Doinqigong is twelve. (2) The number of oriental medicine classics connected with Doinqigong's theory is four. and the contents are the working principle of Doinqigong, the Doinqigong following to time, the control of life's cultivation, the importance of consciousness, the consciousness of the running qigong and so on.

고착협 내탈립 기계수확 적응 장류⋅두부용 콩 품종 ‘새금’

김현태(Hyun Tae Kim),한원영(Won Young Han),이병원(Byung Won Lee),고종민(Jong Min Ko),이영훈(Yeong Hoon Lee),백인열(In Youl Baek),윤홍태(Hong Tai Yun),하태정(Tae Joung Ha),최만수(Man Soo Choi),강범규(Beom Kyu Kang),김현영(Hyun Yeong K 한국육종학회 2019 한국육종학회지 Vol.51 No.4

The soybean cultivar, ‘Saegeum’, has been developed for preparing soy-paste and tofu. The soybean cultivars ‘Daepung’ and ‘SS98207-3SSD-168’ were crossed in 2003 to obtain ‘Saegeum’. Single seed descent method was used to advance the generation from F3 to F5, and the plant lines with promising traits were selected from F6 to F7 by pedigree method. The preliminary yield (PYT) and advanced yield trials (AYT) were conducted from 2009 to 2010, and the regional yield trial (RYT) was conducted in 12 regions between 2011 and 2013. The morphological characteristics of ‘Saegeum’ were as follows: determinate plant type, white flower, tawny pubescence color, and brown pod color. Flowering and maturity dates were August 2, XXXX and October 17, XXXX, respectively. Plant height, first pod height, number of nodes, number of branches, and number of pods were 79 cm, 18 cm, 16, 2.3, and 44, respectively. The seed characteristics of ‘Saegeum’ were as follows: yellow spherical shape, yellow hilum, and the 100-seed weight was 25.4 g. ‘Saegeum’ was resistant to bacterial pustule and SMV in the field test, and its lodging resistance was mildly strong, whereas its shattering resistance was excellent. The ability of this cultivar to be processed into tofu, soybean malt, and other fermented products was comparable with that of ‘Daewonkong’. The yield of ‘Saegeum’ in the adaptable regions was 3.02 ton ha-1. Thus, ‘Saegeum’ is adaptable to mechanized harvesting because of its high first pod height, as well as lodging and shattering resistance. (Registration number: 5929)

중립 내병 다수성 장류⋅두부용 콩 ‘늘찬’

김현태(Hyun Tae Kim),고종민(Jong Min Ko),백인열(In Youl Baek),한원영(Won Young Han),윤홍태(Hong Tai Yun),이병원(Byoung Won Lee),신상욱(Sang Ouk Shin),서정현(Jeong Hyun Seo),김홍식(Hong Sik Kim),곽도연(Do Yeon Kwak) 한국육종학회 2019 한국육종학회지 Vol.51 No.4

The soybean cultivar ‘Neulchan’ was developed for production of soy-paste and tofu. SS91501-9-1-1 and SS96205 (F2) were crossed in 1998, and F3 to F7 were selected by the pedigree method. A preliminary yield trial (PYT) and an advanced yield trial (AYT) were conducted from 2006 to 2008, and a regional yield trial (RYT) in nine regions was conducted from 2009 to 2011. In the RYT, ‘Neulchan’ was stable n variable environments and generated high yield. ‘Neulchan’ was determinate with white flower, light brown pod color, yellow spherical seed, and yellow hilum. Its flowering date and maturity date were Jul. 30 and Oct. 9, respectively. The plant height was shorter than that of ‘Daewonkong’(a standard cultivar). ‘Neulchan’ had the same node number (14), higher first-pod height (12 cm), and lighter seed weight (21.7 g/100-seed weight) than those of ‘Daewonkong’ (14, 11, and 24.2 g/100-seed weight, respectively). ‘Neulchan’ had high resistance to bacterial pustule, and its resistance to soybean mosaic virus was similar to that of ‘Daewonkong’. The yield and color of ‘Neulchan’ tofu were similar to those of ‘Daewonkong’ tofu, but the hardness was lower than that of ‘Daewonkong’ tofu. The soybean malt scent, fermented soybean yield, and γ-polyglutamic acid (γ-PGA) of ‘Neulchan’ were 3, 215%, and 24.6 mg/g, respectively. Its yield in adaptable regions was 307 kg/10a, higher than that of ‘Daewonkong’. ‘Neulchan’ was expected to be cultivated and used widely for soy-paste and tofu production. (Registration No. 4904).

종피가 터지지 않고 탈립에 강한 녹자엽 검정콩 ‘청자4호’

김현태(Hyun Tae Kim),한원영(Won Young Han),서정현(Jeong Hyun Seo),강범규(Beom Kyu Kang),신상욱(Sang Ouk Shin),김홍식(Hong Sik Kim),이영훈(Yeong Hoon Lee),이병원(Byoung Won Lee),윤홍태(Hong Tai Yun),박장환(Chang Hwan Park),곽도연(Do Y 한국육종학회 2018 한국육종학회지 Vol.50 No.3

‘Cheongja4’ is a black soybean cultivar developed via a cross between ‘Milyang148’ and ‘Daemang’ in 2005. F1 and F2 populations were grown for 2 years, and promising lines were selected using the pedigree method from F3 to F5. The preliminary yield trial (PYT) and advanced yield trials (AYT) were conducted from 2011 to 2012, and regional yield trial (RYT) in 7 regions was conducted from 2013 to 2015. ‘Cheongja4’ is determinate and has purple flowers, a green cotyledon, and black spherical seeds. Flowering date and maturing date were Aug. 5 and Oct. 19, respectively. With respect to its quantitative characteristics, ‘Cheongja4’ has more pods (50) and smaller seed size (30.1g/100-seed weight) than ‘Cheongja3’ (38 and 35.2g/100-seed weight). ‘Cheongja4’ was revealed to be more tolerant to pod shattering than ‘Cheongja3’ in RYT field and indoor test. ‘Cheongja4’ had high levels of resistance to bacterial pustule and soybean mosaic virus in field and inoculation test. Although its seed quality-related characteristics were similar to those of ‘Cheongja3’, it contained more anthocyanin in the seed coat; this is the main functional component of black soybean. The mean yield of ‘Cheongja4’ in RYT was 314kg/10a, 123% of the yield of ‘Cheongja3’. ‘Cheongja4’ is expected to be widely used for variable functional purposes, such as cooking with rice and the production of processed food.

서울시 가구특성에 따른 생활권별 주택 점유형태 및 유형 선택에 관한 연구

김현태(Hyun-Tai Kim),남진(Jin Nam) 서울연구원 2012 서울도시연구 Vol.13 No.2

자동차사고로 인한 손해배상 - 특히 자동차손해배상보호법 제4조와 민법과의 (民法) 관계를 중심으로 -

김현태 ( Hyun Tai Kim ) 연세대학교 사회과학연구소 1970 社會科學論集 Vol.3 No.-

수직 대칭 마이크로스트립 결합선로의 특성 파라미터 추출방법에 관한 연구

유상태(Sang-Tai Yu),최영수(Young-Soo Choi),박선주(Sun-Ju Park),Baatarkhuu Dorjsuren,김현태(Hyun-Tai Kim),한상민(Sang-Min Han),임종식(Jong-Sik Lim),안달(Dal Ahn) 한국정보기술학회 2011 한국정보기술학회논문지 Vol.9 No.7

In this paper, A new extraction method of the characteristic parameters of a vertical symmetric coupled transmission line is suggested. We extract characteristic parameters using results of S-parameter for coupled line by simulation. To verify the accuracy of this extraction method, a vertical symmetric coupled line coupler that has -20㏈ coupling at the center frequency 1.8㎓ is used. The extraction method of the characteristic parameters shows the excellent accuracy by comparing the results of EM simulation to the extracted characteristic parameters.

전통적인 성악 발성법과 SLS 발성법의 비교 분석: 계승과 변화를 중심으로

송양(YANG SONG),김현태(Hyun Tai Kim) 한국산학기술학회 2023 한국산학기술학회논문지 Vol.24 No.2

세스 릭스(Seth Riggs)가 고안한 SLS(Speech Level Singing, 이하 SLS) 발성법은 전 세계적으로 널리 알려졌지만 그 평가에는 상반된 논란이 있다. 현재의 대중음악처럼 마이크를 사용하는 가창 환경에서는 무리한 성대 사용을 방지하여 좋은 소리를 낼 수 있는 반면, 과거 클래식 성악곡과는 다른 발성법이기 때문에 음량을 증폭시키는 장치 없이 넓은 공간에서 풍부한 성량을 발휘하지 못하는 한계가 있다고 볼 수 있다. 본 연구는 전통적인 성악 발성법과 SLS 발성법의 비교 분석을 통해 두 발성법이 어떤 공통점과 차이점이 있는지 살펴보고 계승된 부분과 변화된 원인을 도출하여 핵심 개념과 관점을 체계적으로 정립하는데 그 목적이 있다. 두 발성은 발성 원리, 성대 및 후두 이론, 음색 생성 등에서 유사한 부분이 있지만 훈련 목적, 음향 공간 및 호흡 방법 등의 관점에서는 차이점을 보인다. SLS 발성법이 새로운 보컬훈련 방식으로서 인정받기 위해 전통적인 발성 기술의 기초와 장점 중 일부를 그대로 유지한 동시에 시대 변화에 유동적으로 적응하여 전파된 것을 볼 수 있다. The Speech Level Singing (SLS) vocalization method developed by Seth Riggs is widely known around the world, but its evaluation has caused conflicting controversies. In the current singing environment using a microphone (as seen in popular music), it is possible to make good sound while avoiding overuse of the vocal cords. However, because this method is different from classical music, the performer cannot produce enough volume without a device to amplify the voice in a wide space. The purpose of this study is to analyze the similarities and differences between traditional vocalization and SLS vocalization to find reasons for inheritance or change, and to systematically organize the core concepts and opinions. The two methods have similarities in vocalization principles, vocal cord theory, larynx theory, and sound production, but there are differences in terms of training, acoustical space, and breathing methods. This study shows that in order to be recognized as a new vocal training method, SLS vocalization must flexibly adapt to changing times and popularity while retaining a part of the foundation and advantages of the traditional vocalization method.

기상재해 대비 간척지 논 범용화를 위한 저비용 고효율 암거개발

박영준 ( Young-jun Park ),김현태 ( Hyun-tai Kim ),박찬기 ( Chan-gi Park ),전상옥 ( Sang-ok Jeon ),임청룡 ( Cheong-ryong Lim ) 한국농공학회 2022 한국농공학회 학술대회초록집 Vol.2022 No.-

간척지의 특징은 대구획으로 저지대에 위치하여 있고 지하수위가 20∼50 cm로 비교적 높아 배수정도가 불량하며, 토양이 환원상태로 유지되기 쉽다. 또한, 지형적인 영향으로 장마철에 침수될 우려가 있어 지하배수도 필요하지만, 장변이 길고 평지로 인해 경지 내 지표잔류수가 오래 지속되므로 습해 발생의 주요 원인인 지표수를 배제시킬 수 있는 기술이 필요하다. 반면 건기에는 작물에 필요한 물공급이 필요한데 담수관개를 하는 논과 달리, 간척지 대규모 밭에 지표관수는 관수시설의 설치, 이동, 철거 문제와 관수 후 표층토양 고결 문제 등의 어려움이 많아 간척지에 적합한 관개기술의 개발이 필요하다. 이에 본 연구에서는 저평지 대구획 간척지에서 지표잔류수 배수촉진을 위한 수직소수재(왕겨)를 수평매트 및 암거관과 함께 동시에 설치하는 수평매트+수직소수재 암거공법을 개발하였다. 또한 설치된 암거관을 활용하여 자동 지하수위계와 연동하며 지하에 급수가 가능한 지하관개시스템도 개발하여 현재 화옹 시험포에서 밭작물 재배시험과 연계하여 현장실증 연구를 수행하고 있다. 특히 재배시험의 경우 밀(조경)과 콩(대찬, 선풍)을 중심으로 시험하고 있으며 올해 처음 수확한 밀의 경우 약 3톤/ha(일반 밭과 비교 시 75%)의 수확량을 달성하여 그 가능성을 확인하였다. 앞으로 간척농지를 대상으로 생산기반기술 개발과 연계하여 콩, 옥수수, 사료작물 등 다양한 밭작물에 대해 실증연구를 수행할 계획이다. 본 연구를 통해 간척농지를 활용한 밀·콩 기초 식량 전문 생산단지 구축 및 국내 기초식량 자급 기반 마련을 도모하고자 한다.