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비선형 간섭계를 이용한 광 코드 분할 다중 접속 부호기와 복호기
정제명,Jeong, Je-Myung 대한전자공학회 2000 電子工學會論文誌-SD (Semiconductor and devices) Vol.37 No.1
방송 네트워크 또는 근거리 통신망에서 사용 가능한 비선형 간섭계를 이용한 광 부호 분할 다중 접속 (Optical Code division multiple access) 방식의 통신을 위한 부호기와 복호기를 제안하였다. 제안된 부호기와 복호기의 동작 원리는 광섬유 간섭계 내에서 두 개의 광신호가 같이 진행할 때 생기는 비선형 효과인 교차 위상 변조(cross phase modulation)에 기초를 두고 있으며, 교차 위상 변조를 통해 WDM 결합기 위치 배열에 따라 임의의 광 펄스-시퀀스를 생성(generation)하고 상관(correlation)할 수 있다. 이러한 기본 동작 원리를 보이기 위해 기존의 레이저 및 광섬유로 구성되는 Sagnac 간섭계를 이요해서 기초 실험을 하였다. 실험 결과에서 상관된 출력 값은 예상한 바와 같이 Incoherent 파워 중첩이 아니라 상관된 위상 값의 $sin^2$으로 중앙 첨두치 대 부엽의 위상 비는 2:1이나 출력 값은 3:1이었다. We propose a modified nonlinear fiber optic interferometer which can serve to generate binary optical pulse sequences for CDMA networks, and to decode them. In one arm cross-phase modulation between a CW signal and a counter- or copropagating high-power pulse takes place in sequences of segment connected via VDM couplers. Preliminary experimental results on code generation as well as autocorrelation and crosscorrelation are presented, using Sagnac interferometer. As we expected, the experimental results show that the outputs of the interferometer device are not summed simply on the basis of power, but the sin-squared version of it. Arbitrary codes can in principle be implemented.
Design and Performance Analysis of a Bio-optical Sub-assembly for Diffuse Optical Technologies
정제명,박경수,김세환 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.9
This paper presents a compact, multi-wavelength, and high-frequency-response light sourcenamed the bio-optical sub-assembly (BiOSA). The BiOSA is used to measure the absorption andthe reduced scattering coefficients from diffuse optics-based biomedical systems. It is equippedwith six laser diodes and one optical fiber with a 400-μm diameter core. Simulations can be usedto determine the design parameters and to confirm the feasibility of the BiOSA. The evaluationresults indicate that the coupling efficiency of the fabricated BiOSA is 80 85%, and the frequencyresponse is up to 3.38 GHz.
유선질환에서 Estrogen 수용체출현에 관한 면역조직화학적 관찰
정제명,박용욱,유재형,송계용 중앙대학교 의과대학 의과학연구소 1988 中央醫大誌 Vol.13 No.1
To observe the epithelial staining reaction and the distribution of Estrogen recepter (ER) in carcinomas and a variety of benign breast diseases, immunohistochemical studies were carried out with paraffin embedded sections. The studies consisted of 8 cases of infiltrating ductal carcinoma, 4 cases of medullary carcinoma, 2 cases of infiltrating mucinous carcinoma, 2 cases of infiltrating lobular carcinoma, 3 cases of intraductal carcinoma, 1 cases of intraductal papillary carcinoma, 1 cases of intraductal papilloma, 6 cases of fibroadenoma and 16 cases of fibrocystic diseases. Method of immunohistochemical staining was immunoperoxidase technique labeled with avidin-peroxidase complex. The results were as follows: 1. The intracytoplasmic and intranuclear ER positive reaction was observed in 1 case of the fibroadenoma and 3 cases of the infiltrating ductal carcinoma. 2. The positive reaction of ER in the intraductal carcinomas was weaker than of the infiltrating ductal carcinoma. 3. The positive reaction of ER in the infiltrating ductal carcinoma was the strongest among the subtypes of the invasive mammary carcinoma. 4. The positive reaction of ER in the benign breast diseases was focally and weakly observed, although that was weaker than of the carcinoma.
박삼식,강재구,왕순주,정제명 대한응급의학회 1998 대한응급의학회지 Vol.9 No.1
Intussusception is a condition of invagination of the proximal segment of bowel into the more distal receiving bowel. Intussusception is one of the common pediatric and surgical emergencies of infancy and childhood in Korea. Intussusception is the most common cause of acquired intestinal obstruction in infancy and childhood, and it needs emergency treatment. 1) On the age and sex distribution, the age under 15 month was the most common(70.6%), and the peak incidence was 3-12 months of age(60.1%). In sex distribution, male to female ratio was 1.25:1. 2) The seasonal distribution was summer(27.4%), spring, autumn and winter in order of frequency 3) As to the etiology of Intussusception treated by surgery, idiopathic was the most common(75%). 4) The cardinal symptoms and signs were vomiting (72.5%), bloody or bloody mucoid stool (57.5%), abdominal pain(49.7%), abdominal distention(20.9%), abdominal mass(19.6%) and others in order of frequency. 5) On the hematologic finding, 60.8% revealed leukocytosis above 10,000/mm3 6) As to the duration from the onset of the symptom to admission, 84.2% was within 24hours, 9.8% was from 24 hours to 48 hours, and 5% was over 48 hours. 7) The common anatomical types were ileocolic(73.2%), and ileocecal(17.0%). 8) The success rate of air reduction was 84.3%. 9) In the method of operation, manual reduction was performed in 91.7% and intestinal resection in 8.3% 10) The recurrence rate after air reduction was 12.4%, and after operative manual reduction was 8.3%