선분할법(Method of Line)을 이용한 마이크로스트립 선로의 분산특성에 관한 해석

이승엽 麗水水産大學校 産業技術硏究所 1995 産業基術硏究所 論文集 Vol.4 No.-

In order to design the structure of MMIC(Monolithic Microwave Integrated Circuits) in microwave and millimeter wave bands, an efficient method for calculating the dispersion characteristics is needed. This paper treats "the Method of Lines(MoL)" in mathematical literature that can be applied to microstrip lines the basic structure of MMIC. MoL discretizes the wave equation can be solved analytically. Therefore this method consumes the computing time in comparision with the Full wave method. Using this Method, the frequency-dependent characteristics of single microstrip lines is obtained with the various parameters of the line. And numerical results calculated by this method are compared with data by Full wave method in order to confirm the accuracy.

SDA를 이용한 마이크로스트립-슬롯 결합 급전선 해석

이권연,이승엽 麗水水産大學校 産業技術硏究所 1996 産業基術硏究所 論文集 Vol.5 No.-

The new feeding technique which is introduced for aperture coupled microstrip antenna, is analysed in this paper, in microstrip-slot coupled feeder, the microstripline is the first feeder and the narrow slotline which is on the ground is the second feeder to antenna above the slot. The reflection coefficient and the transmission coefficient caused by a slot type discontunuity is analysed using the reciprocity theorem. To analyse microstrip-slot coupled feeder, the equivalent magnetic current is obtained from the schematic of the substrate with a feed line and a slot. The exact Green's function is derived from the equivalent magnetic current and then analysed in a moment method solution using PWS mode functions assumed as an unknown E field an a slot aperture. The unknown E field can be represented by one PWS mode, since the operational frequency is in S-band. The equivalent series impedance seen by the microstrip feed line is added to the equivalent admittance of the slot. The SDA(Spectral Domain Approach) with Green' function is carried and the characteristics of microstrip-slot coupled feeder can be considered with varying many parameters of the substrates.

인체혈 중 임파구로부터 감마 - 인터페론의 생산

이상기,정태화,한문희,염영일,정일엽 생화학분자생물학회 1991 BMB Reports Vol.19 No.3

Interferon-γ (IFN-γ) was produced from human peripheral blood lymphocytes (Hu-PBL) by stimulating them with various kinds of mitogens. T-cell mitogens such as Con A and PHA-M were much more potent than B-cell mitogen such as PWM in producing IFN-γ from Hu-PBL. The combined treatment of TPA with these mitogens enhanced IFN-γ production ten fold compared with the single treatment of each mitogen. Both DNA synthesis and IFN-γ production yielded bell-shaped dose-response curves for a given population of Hu-PBL in response to Con A. The effect of fetal calf serum(FCS) on IFN-γ production was found to be critical: titer of IFN-γ produced was very low in the absence of FCS and reached peak point at 2% FCS, beginning to decrease precipitously with an increasing FCS concentration up to 20%. Using the relationship between IFN-γ production and mitogenic stimulation, it was found that one of factors responsible for the decrease of IFN-γ production at the high serum concentration could be the binding of Con A to serum proteins which rendered Con A to be removed from the production system.

선천성 대망낭종 1예

최승욱 ( Sung Uk Choi ),오상엽 ( Sang Yup Oh ),박준철 ( Joon Cheol Park ),이정호 ( Jeong Ho Rhee ),김종인 ( Jong In Kim ) 대한주산의학회 2002 Perinatology Vol.13 No.3

대망낭종은 드문질환으로 아직 그 발생기전이 확실히 밝혀져 있지 않으며 후천성으로 생기기도 하지만 선천성으로 생길 경우 심할시 태아의 복부 팽만으로 인한 복강 및 흉강 장기에 대한 압박으로 장기 형성 부전 등을 유발하여 태아사망을 초래할수 있는 질환으로 알려져 있다. 아직 태아의 선천성 대망낭종에 대해 전에 문헌상 보고된 예는 별로 없다. 본 증례에서는 제태기간 16주 1일의 산모에게서 태아에 수반된 선천성 대망낭종을 경험하였기에 간단한 문헌고찰과 함께 보고하는 바이다. Omental cyst is a rare disease and its accurate time and cause of outbreak has not been reported. This disease is known as can be afflicted with postnatally and in case of being afflicted with pre-natally the abdominal cavity and thoracic organ of fetus are oppressed due to fetal abdominal distention leading to fetal death caused by organ dysgenesis. No medical report has yet been published on congenital omental cyst of fetus. This study was conducted on a case of congenital omental cyst of fetus we have experienced in a mother with 16weeks of gestational period and the result is hereby reported along with literally documents.

전자간증에서의 혈청내 용해성 Fas/Fas 배위자 값 및 태반 조직의 Fas/Fas 배위자 발현에 관한 연구

오상엽 ( Sang Yup Oh ),박준철 ( Joon Cheol Park ),권상훈 ( Sang Hoon Kwon ),조치흠 ( Chi Hum Cho ),이정호 ( Jeong Ho Rhee ),차순도 ( Soon Do Cha ),윤성도 ( Sung Do Yoon ),김종인 ( Jong In Kim ) 대한산부인과학회 2006 Obstetrics & Gynecology Science Vol.49 No.3

Analysis of Triangular Microstrip Antennas with Frequency Agility and Polarization Diversity in Mobile Communication

Kyung Jae Kim,Sung Yup Rhee,Han Kyu Park 대한전자공학회 1991 JTC-CSCC : Joint Technical Conference on Circuits Vol.- No.-

Detection of Ultralow level UO₂<SUP>2+</SUP> in Natural Water with Plasmonic Interstice Sensor

Seung Min YOO,Raekeun GWAK,Hongki KIM,Sang Yup LEE,Gyoung-Ja LEE,Min-Ku LEE,Chang-Kyu RHEE,Taejoon KANG,Bongsoo KIM 한국생물공학회 2016 한국생물공학회 학술대회 Vol.2016 No.4

치료가 지연된 대퇴골 원위부 골절의 골결손에 대한 자가해면골과 전처리된 이종골의 혼합이식

권순용,이화성,이주엽,우영균,이승구 대한골절학회 1996 대한골절학회지 Vol.9 No.4

There are many difficulties and problems to get anatomical reduction and rigid internal fixation in treatment of supracondylar and intercondylar fracture of the femur. Authors reviewed and clinically analysed 7 patients with supracondylar and intercondylar fracture of the femur treated by delayed reconstruction from August 1993 to December 1995. Of 7 cases , there were 5 cases of open and 2 cases of closed fracture. According to AO classification, 7 cases were classified as followed;A3 type- 1 case, C2 type-4 cases . and C3 type-2 cases. They underwent surgical treatment at average 35 days after injury(range from 25 days to 58 days). Main causes of delay in surgical treatment were poor preoperative condition associated with multiple injuries in 3 cases, wound problems at the site of open fracture in 3 cases and the combined state in 1 case. For internal fixation of fractures, a supracondylar nail in 4 cases and a dynamic condylar screw in 3 cases were used, and the bony defective area of fracture site in all 7 cases was replaced by the composite graft made of the autogenous cancellous bone and the processing allograft (Tutoplast). The period of follow up was from 8 months to 30 months(average time 14.8 months). There were no infection or allograft-rejection postoperatively. Clinical union was achieved from 6 months to 10 months in 6 cases. and nonunion associated with incomplete incorporation of graft bone was developed in l case. In 6 cases of clinical union, clinical assessment estimated by Schatzker and Lambert's criteria was fair in 1 case and failure in 5 cases. and change of libiofemoral alignment occurred in 2 cases. The above poor clinical results could be considered to be derived from the delayed operative intervention multing in joint stffness due to soft tissue contracture. arthritis and large bony defect. In conclusion. even if it showed poor clinical results, the composite graft made of the autogenous cancellous bone and the processing allograft could serve as a possible alternative for restoration of large bony defect in delayed restoration of supracondylar and intercondylar fracture of the fumur.

최근 10년동안 동산 의료원에서 시행한 제왕절개술의 적응증 및 빈도의 분석

박준철 ( Joon Cheol Park ),오상엽 ( Sang Yup Oh ),이동호 ( Dong Ho Lee ),이정호 ( Jeong Ho Rhee ),김종인 ( Jong In Kim ) 대한주산의학회 2003 Perinatology Vol.14 No.2

연구목적: 제왕절개술에 대한 적응증, 제왕절개분만의 연령별 분포 및 주수에 따른 제왕절개분만의 빈도를 알아보기 위해 계획되었다. 방법: 본 연구에서는 계명대학교 동산의료원에서 1993년 1월부터 2002년 12월까지 만 10년간 분만한 35,891례 중에서 제왕절개술로 분만한 10,411례를 대상으로 제왕절개술의 빈도와 그 적응증, 제왕절개 분만 산모의 연령별 분포 및 분만 주수에 따른 제왕절개분만의 빈도를 알아보기 위해 후향적 조사를 통하여 결과를 분석하였다. 결과: 1) 총 분만 35,891례 중에서 총 제왕절개분만의 빈도는 29.0%였으며, 1차 제왕절개분만이 16.8%, 반복 제왕절개분만이 12.2%였다. 전체 제왕절개분만 중에서 반복 제왕절개 분만이 42.0%를 차지하였다. 연도별 반복 제왕절개술 비율은 35.6~49.3%를 나타내었다. 2) 연령별 제왕절개술의 빈도는 26~30세 사이에 가장 높은 빈도를 나타내었고 임신 주수는 36주 이상에서 9,100례로 가장 많았다. 그러나 35세이상의 고령산모와 37주미만의 조산산모들의 증가가 두드러졌다. 3) 일차 제왕절개술의 적응증은 이상 태위와 아두골반불균형이 가장 높은 빈도(19.17%)를 나타내었고, 태아곤란증(16.4%), 모성 질환(9.34%) 순이였다. 결론: 제왕절개술에 의한 분만은 지난 수년 동안 크게 증가하고 있다. 제왕절개술의 4가지 중요한 적응증은 반복절제, 난산, 이상 태위 그리고 태아 곤란증으로서, 이중 반복절제와 이상 태위가 전체 제왕절제술 적응증의 절반 이상을 차지하고 있다. 또한 3차 병원으로서 모성질환을 갖고 있거나 노령산모, 조산 산모 등 고위험 임산부가 증가하였으며, 반복제왕절개술을 위해 내원한 산모가 증가함으로써 본원의 제왕절개술의 빈도가 점차 증가하고 있다고 본다. Objective:The aim of this study was to evaluate the rate and indications of cesarean delivery. Methods:All live birth>27weeks at the Dongsan Medical Center, Keimyung University from 1993 to 2002(n=35,891) were retrospectively analyzed of delivery route, indication of cesarean birth, gestational age, and maternal age. Results:Total cesarean rate was 29.0%(10,411/35,891) and primary rate was 16.8%(6,041/35,891). The annual primary cesarean birth rate number was increased gradually. The most common maternal age of cesarean section patients was between 26-30 years(43.7%). The most common gestational age of cesarean section patients was over 36 weeks(87.4%). Abnormal presentation and CPD were the most common indication(19.17%, 1,158/6,041) at primary cesarean deliveries. The third common indication was fetal distress(16.44%, 993/6,041). Conclusions:Total cesarean rate was increased gradually by increasing the previous section rate as well as the primary section rate. Further evaluation will be needed about the relationship between cesarean deliveries and long term fetal outcome, and the effort for VBAC will be needed.

Production of Interferon-$\gamma$ from Human Peripheral Blood Lymphocytes

정일엽,염영일,이상기,정태화,한문희,Chung, Il-Yup,Yeom, Young-Il,Rhee, Sang-Ki,Chung, Tai-Wha,Han, Moon-Hi 생화학분자생물학회 1986 한국생화학회지 Vol.19 No.3

인체혈액에서 분리한 임파구세포를 PHA-M, Con A, PWM등의 mitogen으로 자극시켜 여러가지 조건하에서 감마-인터페론을 생산하였다. 유도물질로 사용된 T-세포 mitogen인 PHA-M이나 Con A가 B-세포 mitogen 인 PWM보다 감마-인터페론 유도에 훨씬 효율적이었으며 이로부터 임파구세포 중에서 T-세포가 감마-인터페론을 생산하는 주요세포원 임을 확인하였다. 감마-인터페론 생산시 Con A의 적정농도는 $5-10\;{\mu}g/ml$이었다. 유도개시 약 48시간 경과 후 인터페론이 최대로 생산되었고 그 이후에도 인터페론의 활성은 감소되지 않았다. Phorbolester인 TPA를 첨가할 경우 Con A 또는 PHA-M 단독으로 인터페론을 유도시킨 것보다 10배 이상의 감마-인터페론의 생산이 증가되었다. 생산배양액에 첨가되는 혈청의 농도가 인터페론의 생산에 마치는 영향은 매우 극적이어서 태아 송아지 혈청농도 2%에서 최대로 생산되었고 농도가 증가함에 따라 생산역가는 급격히 떨어졌다. 혈청 대신 사용한 알부민 단백질도 비슷한 효과를 나타냈다. 혈액중에 임파구세포에 처리된 Con A가 DNA 합성을 촉진시키는 성질을 이용하여 $^3H$-thymidine 표식으로 cpm을 측정해 본 결과, 이와같은 현상은 10-20%의 높은 혈청농도에서 Con A가 과량의 혈청단백질과 흡착하여 실제적인 Con A 농도를 적정농도 이하로 떨어뜨리기 때문인 것으로 나타났다. Interferon-$\gamma$(IFN-$\gamma$) was produced from human peripheral blood lymphocytes (Hu-PBL) by stimulating them with various kinds of mitogens. T-cell mitogens such as Con A and PHA-M were much more potent than B-cell mitogen such as PWM in producing IFN-$\gamma$ from Hu-PBL. The combined treatment of TP A with these mitogens enhanced IFN-$\gamma$ production ten fold compared with the single treatment of each mitogen. Both DNA synthesis and IFN-$\gamma$ production yielded bell-shaped dose-response curves for a given population of Hu-PBL in response to Con A. The effect of fetal calf serum(FCS) on IFN-$\gamma$ production was found to be critical: titer of IFN-$\gamma$ produced was very low in the absence of FCS and reached peak point at 2% FCS, beginning to decrease precipitously with an increasing FCS concentration up to 20%. Using the relationship between IFN-$\gamma$ production and mitogenic stimulation, it was found that one of factors responsible for the decrease of IFN-$\gamma$ production at the high serum concentration could be the binding of Con A to serum proteins which rendered Con A to be removed from the production system.