정관문합술후 임신율에 영향을 미치는 인자에 관한 연구

박성태,이정구,김제종,조재흥,Park, Sung-Tae,Lee, Jeong-Gu,Kim, Je-Jong,Cho, Jae-Heug 대한생식의학회 1996 Clinical and Experimental Reproductive Medicine Vol.23 No.1

Vasectomy has become a popular method for male sterilization and this, in tum, has been followed by an increase in the number of patients requiring vasectomy reversal. Recently, many authors have reported a high success rate of vasovasostomy using microsurgical techniques. However, a significant discrepancy exist between the anatomical patency rate and pregnancy rate despite improvements in surgical techniques. Number of 420 patients who underwent vasovasostomy by a modified one layer reanastomosis from January 1986 to December 1994 were reviewed. Of the total, Complete follow up were possible in 115 patients. Of the 115 patients, 74 patients were treated by macroscopic reanastomosis, and microscopic technique were applied in 41 patients. Duration of vasal obstruction, gross apperance of vasal fluid, operative method, presence or absence of sperm and sperm granuloma, and results of postoperative semen analysis were analyzed as factors influencing the pregnancy rate. Success rates for patency and for pregnancy were 81% and, 42% respectively. Rate of pregnancy were increased if there were shorter periods of obstruction(<10years), bilateral observation of watery vasal fluid, presence of sperm bilaterally, bilateral presence of sperm granuloma at the vasectomy site, and normal results on postoperative semenalysis. With these results, we can conclude that all factors mentioned may affect the success rate of pregnancy following vasovasostomy.

고체산화물연료전지 연결재용 La_0.7Ca_0.3Cr_0.9Co_0.1O_3-_δ 조성계에 Ca Source 변화에 따른 소결 및 전기적 특성에 관한 연구

박성태,최병현,지미정,안용태,최헌진,Park, Sung-Tae,Choi, Byung-Hyun,Ji, Mi-Jung,An, Yong-Tae,Choi, Heon-Jin 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.3

Effects on sintering and electrical properties of $La_{0.7}Ca_{0.3}Cr_{0.9}Co_{0.1}O_{3-{\delta}}$ system, a interconnect material for cylindrical and flat tubular solid oxide fuel cells (SOFC), have been investigated by Ca-source when using $CaCO_3$ and $CaF_2$. When using $CaCO_3$ and $CaF_2$ was mixing as Ca-source, single phased perovskite solid solution was observed for each sample. The sintering temperature was decreased by $CaF_2$ contents was increased. When using 0.1 mole $CaF_2$ was densely sintered at $1400^{\circ}C$ and relative density was 93.8%. Also, electrical conductivity in oxidation and reducing atmosphere was 47, 4.3 S/cm, respectively, due to $F^-$ ion enhance the electrical conductivity in reducing atmosphere.

Au-conjugate 면역화학 진단용 금 나노입자 제조

박성태,이광민,Park, Sung-Tae,Lee, Kwang-Min 한국재료학회 2003 한국재료학회지 Vol.13 No.8

Current nanogold cluster synthesized by chemical routine with 11 or 55 atoms of gold has been widely used for immuno chemistry probe as a form of nanocluster conjugated with biomolecules. It would be an undeveloped region that the 1 nm size of nanogold could be made by materials engineering processing. Therefore, objective of this study is to minimize the size of gold nanocluster as a function of operating temperature and chamber pressure in inert gas condensation (IGC) processing. Evaporation temperature was controlled by input current from 50 A to 65 A. Chamber pressure was controlled by argon gas with a range of 0.05 to 2 torr. The gold nanocluster by IGC was evaluated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The gold nanocluster for TEM analysis was directly sampled with special in-situ method during the processing. Atomic force microscopy (AFM) was used to observe 3-D nanogold layer surfaces on a slide glass for the following biomolecule conjugation step. The size of gold nanoclusters had a close relationship with the processing condition such as evaporation temperature and chamber pressure. The approximately 1 nm size of nanogold was obtained at the processing condition for 1 torr at $1124 ^{\circ}C$.

근수축 구현 방식에 따른 레그프레스 트레이닝이 하지근력에 미치는 영향

전태원 ( Tae Won Jun ),신현정 ( Hyun Jung Sin ),김용운 ( Yong Woon Kim ),박성태 ( Sung Tae Park ) 한국운동생리학회(구 한국운동과학회) 2011 운동과학 Vol.20 No.4

전태원, 신현정, 김용운, 박성태. 근수축 구현 방식에 따른 레그프레스 트레이닝이 하지근력에 미치는 영향. 운동과학, 제20권 제4호. 397-404, 2011. 본 연구는 12주간의 레그프레스 동작을 통한 등장성 트레이닝과 등속성 트레이닝이 하지근력에 미치는 효과 차이를 분석하는 것이다. 연구대상자는 20대 젊은 성인 남성으로 규칙적인 운동 트레이닝의 경험이 없는 60명을 선정하였다. 이들을 20명씩 세 그룹으로 무선배정하여 등장성 트레이닝 집단(IT), 등속성 트레이닝 집단(IK) 그리고 통제집단(Con)으로 나누었다. 각 집단은 사전에 등장성 및 등속성 근력측정을 시행하였고, 12주 트레이닝 기간 후에 같은 측정을 시행하였다. 두 트레이닝 집단은 등장성 및 등속성 측정과 트레이닝이 동시에 가능한 장비를 이용하였으며, 통제집단은 12주간 일상생활을 유지하도록 하였다. 본 연구의 결과는 다음과 같다. 첫째, 등장성 근력측정 결과, 등장성 트레이닝집단과 등속성 트레이닝집단은 양측, 우측, 좌측 근력측정 모두에서 트레이닝 전에 비해 트레이닝 후에 최대근력의 증가를 나타내었고, 통제집단은 트레이닝 전후에 유의한 차이가 없었으며. 두 트레이닝집단 간의 유의한 차이는 나타나지 않았다. 둘째, 등속성 근력측정 결과에서도 등장성 트레이닝집단과 등속성 트레이닝집단은 모든 측정 모드와 저속, 고속측정에서 트레이닝 후에 최대근력의 증가를 나타내었고, 통제집단은 트레이닝 전후에 유의한 차이가 없었으며. 두 트레이닝집단 간의 유의한 차이는 나타나지 않았다. 결론적으로 등장성 및 등속성 레그프레스 트레이닝은 하지근력의 향상을 위한 트레이닝 방법으로 적합한 것으로 제안될 수 있다. Jun, T. W., Sin, H. J., Kim, Y. W., Park, S. T. Effect of leg press training on low-extremity muscle strength to muscle contraction modes. Exercise Science. 20(4): 397-404, 2011. The purpose of this study was to investigate the difference of low-extremity muscle strength to isotonic and isokinetic leg press training. For this purpose, sixty healthy male participants were randomly assigned to the isotonic (IT: n=20), the isokinetic (IK: n=20) and the control (Con: n=20) group. Both IT and IK groups trained their bilateral (UI), unilateral right (ULR), unilateral left (ULL) leg 3 sessions/week for 12 weeks on dynamometer with isotonic or isokinetic method, respectively. Isotonic and isokinetic tests were performed on a dynamometer before and after strength training. Significant strength increases in both two test conditions were noticed for IT and IK groups without any significant difference between the two trained groups. And there is no change in control group. In conclusion, both isotonic and isokinetic training methods could be proposed to improve muscle strength in various training fields.

Wavelet based knock detection for gasoline engines

박성태(Sung-Tae Park),양진국(Yang Jianguo) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_1

Engine knock is a major cause of pollution, engine parts damage and metallic noise in an engine. But somewhat light knock in an engine can improve the power and economic performance of it Therefore, whether knock is present, when it occurs and how high its intensity is are preconditions for automatic knock control system to work. Wavelet transform is an effective and promising signal processing method for shock feature detection, especially for light shock feature detection. In this work, knock phenomenon is measured from a gasoline engine by a pressure sensor mounted in a spark plug and an accelerometer mounted in the engine block head, and the discrete wavelet transform (DWT) is applied to detect knock feature from the measured pressure signals. It is shown that there is a significant improvement on the signal to noise ratio (SNR) by using this approach, especially for light knock.

FDR수분센서 센서간 간격에 따른 수분함량 측정값의 변화 특징

박성태(Sung Tae Park),정금향(Geum Hyang Jung),최기영(Ki Young Choi),이용범(Yong-Beom Lee),오정심(Jeong Sim Oh),유형주(Hyung Joo Yoo) 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.10

6주간의 달리기 운동이 고지방 식이 쥐의 혈중 인슐린 농도와 비복근 GLUT4 단백질 발현에 미치는 영향

박성태 ( Sung Tae Park ),오명진 ( Myung Jin Oh ),윤재석 ( Jae Seok Yoon ),김종오 ( Jong Oh Kim ),이희혁 ( Hee Hyuk Lee ),김진영 ( Jin Young Kim ),윤진환 ( Jin Hwan Yoon ),정일규 ( Il Gyu Jeong ),김경래 ( Kyeong Lae Kim ) 한국운동생리학회(구-한국운동과학회) 2005 운동과학 Vol.14 No.3

RW와 LQ기법을 이용한 지역경제구조 및 지역산업연관분석

박성태(Sung-Tae Park),주병철(Byeoung-Chul Ju) 한국산업경제학회 2016 산업경제연구 Vol.29 No.2

지역경제 개발정책 수립과 그 성과 분석을 위해서는 지역산업간 상호연관관계를 파악하는 것이 매우 중요하다. 그러나 지역경제와 관련된 산업체계가 명확하지 않고 지역사회계정의 한계로 신뢰성 있는 계량적 자료의 생산이 어려운 실정이다. 본 연구에서는 지역단위에서 적용 가능한 지역산업연관분석 모형을 이용하여 진안군을 대상으로 산업연관분석을 수행하였다. 지역산업연관표 작성은 전국생산자가격표를 기초로 활용하였으며, 지역산업분류는 22×22부문으로 통합·조정하였고, 지역투입계수 도출에는 다단계접근법을 사용하였다. 분석결과, 지역산업 총산출액과 종사자규모는 전국 대비 0.037%로 매우 낮은 수준을 나타냈으며, 지역내 생산유발계수 전산업평균은 1.6166, 부가가치유발계수 0.9161, 고용유발계수 0.0123으로 추정되었다. 후방연관효과를 나타내는 영향력계수는 음식료품 1.4853, 음식점 및 숙박 1.3396, 비금속광물제품 1.2884 순으로, 전방연관효과 지표인 감응도계수는 석유·석탄 및 화학 1.6187, 음식료품 1.5167, 부동산 및 사업서비스 1.3223 순으로 나타났다. 추가적으로 시행한 산업유형분석에서는 음식료품, 음식점 및 숙박, 농림수산품 등의 6개 부문이 전후방연관효과가 높은 중간수요적 제조업형으로 분류되었으며, 이들 산업의 생산유발효과는 평균 1.91배로 지역경제 활성화에 기여할 수 있는 주요산업으로 판단된다. This study conducts an interindustry analysis on ‘Jinan’ district using a regional interindustry analysis model that can be applied to the local economy. A regional interindustry analysis chart has been formulated based on the national producer price chart and each regional industry has been standardized and categorized using a 22 X 22 format. Also, a local input coefficient has been derived using the multi-stage approach. The results indicate that total gross revenue and workforce size was 0.037% below the national average. Further, the local production inducement coefficient across all regional industries has been estimated to be 1.6166, with a value added inducement coefficient of 0.9161, and an employment inducement coefficient of 0.0123. The impact factor coefficient, which shows rear linkage impact, has resulted in the following figures: 1.4853 in food industry; 1.3396 in the restaurant and hospitality industry; and 1.2884 in the non-metal mineral industry. The sensitivity coefficient, which shows front linkage impact, has resulted in the following figures: 1.6187 in the oil, coal, and petrochemical industry; 1.5167 in the food product industry; and 1.3223 in the service and real estate industry. An additional study on six industries, including the food product, restaurant and hospitality, and agricultural goods industry, has indicated high front and rear linkage impact value, which can be categorized as an intermediate demand manufacturing industry. Such industries have shown to have 1.91 times the production inducement effect that can stimulate local economic activity and be considered as the main regional industry.

웨이브렛변환을 이용한 기어결함의 진단

박성태(Park Sung-Tae),김재웅(Gim Jae-Woong),양건국(Jianguo Yang) 한국소음진동공학회 2002 한국소음진동공학회 학술대회논문집 Vol.2002 No.11

코코넛 코이어 혼합 조성, 급액량 및 급액횟수에 따른 배지 수분 특성

박성태(Sung Tae Park),최기영(Ki Young Choi),이용범(Yong Beom Lee) 한국원예학회 2010 원예과학기술지 Vol.28 No.2

2008년 1월부터 2008년 5월까지 코코넛코이어 배지를 이용한 자루재배형(35L) 장미 수경재배에서 FDR(Frequency domain reflectometry) 센서를 사용하여 코이어 혼합(fiber 또는 chip) 조성, 급액량과 공급횟수 차이에 따른 배지 내 수분 함량 변화 특성을 측정하였다. 하루 급액량을 1회 60mL, 총 10회 공급하였을 때 배지 내 평균 수분함량은 fiber함량이 0, 10, 20, 30, 50%인 배지에서 각각 48.7, 42.7, 37.1, 35.8, 34.8%였고 chip함량이 0, 30, 60, 80%인 배지에서도 각각 51.1, 45.3, 37.6, 30.3%였다. 배지간 최고수분함량과 최저 수분함량의 차이는 fiber함량이 20%인 배지와 chip의 함량이 30%인 배지에서 가장 낮았다. 따라서 배지의 수분 함량의 변동이 적고 일정하게 유지되는 장미 수경재배에서 fiber와 chip수준은 20-30%가 적합하였다. Fiber가 20% 함유된 코이어배지에서 1일 급액량을 주당 600mL로 고정하고 1회 급액량을 30, 45, 60, 90, 120 및 150mL로 급액했을 때 배지내 평균 수분함량은 35.4-37.7%, 최저 수분함량은 31.7-34.1%, 최대 수분함량은 37.4-41.4%이었다. 60mL 이상의 급액은 1회의 급액 만으로 평균수분함량에 도달하였다. 평균수분함량과 최저수분함량간의 차이는 1회 급액량이 60-90mL 공급될 때 가장 낮았다. 따라서 급액량을 60-90mL/회로 설정하고 수분의 필요 유무에 따라 급액 횟수를 조절하여 관리하는 것이 적절한 것으로 판단하였다. This experiment was conducted to investigate the water content characteristics of coconut coir substrates on component (dust + fiber or chip) ratios and irrigation rates and times using FDR (Frequency domain reflectometry) sensor for rose in bag culture (35 L) hydroponics from January to May 2008. When water supply rate was 60 mL, average water contents of substrate were 48.7, 42.7, 37.1, 35.8 and 34.8% for 0, 10, 20, 30 and 50% of fiber mixed substrates, respectively and 51.1, 45.3, 37.6 and 30.3% in 0, 30, 60 and 80% of chip mixed substrates, respectively. The margins between maximum and average water contents were the smallest for the substrates with 20% fiber and 30% chip. Substrate with 20-30% of fiber or chip looked appropriate for hydroponics because of low water content variation. Water content changes by water supply rates were investigated with 20% of fiber mixed substrates. The total amount of daily water supply was 600 mL per plant with 30, 45, 60, 90, 120 or 150 mL each time. The average, minimum and maximum water contents of the substrates were 35.4-37.7, 31.7-34.1 and 37.4-41.4%, respectively. It was possible to reach average water content with water supply over 60 mL each time. Margin between average water content and minimum water content was the smallest with water supply of 60-90 mL each time. The water supply of 60-90 mL each time was proper for the coconut coir substrate with 20% fiber.