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PCS 회로 및 PWM 방식에 따른 저주파 리플전류 분석
신동건(Dong-gun Shin),김종수(Jong-Soo Kim),강현수(Hyun-Soo Kang),이병국(Byoung-Kuk Lee) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
본 논문에서는 연료전지 시스템에서 발생하는 저주파 리플 전류의 발생 및 전달과정을 분석하고, PCS 회로 및 PWM 방식에 따른 저주파 리플 영향을 비교 분석한다. 전압형 풀브리지 컨버터와 전류형 풀브리지 컨버터에서의 저주파 리플 전류 발생 양상을 시뮬레이션을 통하여 비교 분석한다.
임동규 ( Dong Kuy Lim ),유광열 ( Kwang Yeol Yoo ),신동건 ( Dong Gun Shin ),김종응 ( Jong Eung Kim ),배준영 ( Jun Young Bae ),배승철 ( Sung Chul C. BAI ),이정열 ( Jeong Yeol Lee ) 한국수산학회 2009 한국수산과학회지 Vol.42 No.3
A 8-week feeding trial was conducted to investigate the effects of dietary supplementation of Kugija (Lycium chinense) on the growth and immunological response in juvenile Korean rockfish (Sebastes schlegeli). Six experimental diets were supplemented with Kugija at 0, 0.1, 0.5 1.0, 3.0 and 5.0% (K0, K0.1, K0.5, K1.0, K3.0, K5.0) on a dry-matter basis. After 2 weeks, triplicate groups of 30 fish initially averaging 3.36±0.2 g (mean±SD) were randomly distributed into the aquarium and were fed one of the experimental diets for 8 weeks. By the end of the 8-week feeding trial, fish fed the K0.5 and K1.0 diets exhibited a higher weight gain and specific growth rate than fish fed K0 and K0.1 diets (P<0.05). Feed efficiency of fish fed the K0.5 diet showed significant higher value than that of fish fed the K0, K3.0 and K5.0 diets (P<0.05). Hepatosomatic index of fish fed the K5.0 diet was significantly higher than that of fish fed the K0.1 and K5.0 diets (P<0.05). Hematocrit of fish fed the K0.5, K1.0 and K5.0 diets was significantly higher than that of fish fed the K0 diet (P<0.05). Glutamic oxaloacetic transaminase of fish fed the K0.5, K1.0, K3.0 and K5.0 diets was significantly lower than in fish fed the other diets (P<0.05). Glutamic pyruvic transaminase activity of fish fed the K3.0 diet was significantly lower than those of fish fed the K0 and K0.1 diets (P<0.05). However, there was no significant difference in the activity of the transaminase in fish fed the K0.5 K1.0, K3.0 and K5.0 diets. Lysozyme activity of fish fed the K0.5 and K1.0 diets was significantly higher than that in fish fed the K0 and K0.1 diets (P<0.05). Respiratory burst activity of fish fed the K3.0 diet was significantly higher than those of fish fed the K0 and K0.1 diets (P<0.05). However, there was no significant difference in respiratory burst activity of fish fed the K0.5 K1.0, K3.0 and K5.0 diets. Fish fed Kugija showed lower early mortality than fish fed a Kugija-free diet upon challenge with Vibrio ordalii. The results suggest that feeding of Kugija (Lycium chinense) enhances growth, non-specific immunity and disease resistance in juvenile Korean rockfish.
조종대(Jong Dae Cho),정수룡(Su Ryoung Cheong),나인균(In Gyun Na),신동건(Dong Gun Shin),박동철(Dong Chul Park),이진관(Jin Kwan Lee) 대한내과학회 1998 대한내과학회지 Vol.54 No.2
N/A Background: A correct estimation of volume status and dry weight in dialysis patients remains a difficult clinical problem Clinical status and chest X-ray are not sensitive enough, while invasively measured central venous pressures are not routinely available. Recently, the ultrasonographic determination of the diameter and collapse index of the inferior vena cava has been proposed as a noninvasive method for estimating intravascular volume. We tried to evaluate the clinical relevance of this method in dialysis patients by comparing it with alphahuman-atrial natriuretic peptide (alpha-h-ANP) and cyclic guanosine 3:5-monophosphate (cGMP) levels. Methods: Using echocardiography, the diameter of the inferior vena cava (VCD) and its decrease on deep inspiration (collapse index : CI) were evaluated in 27 hemodialysis patients. Echocardiography of the inferior vena cava (IVC) was performed in the supine position after 10 minutes rest. The transducer was placed in the subxiphoid region and long and short axis views of the IVC were obtained just below the diaphragm in the hepatic segment. VCD was measured before the P-wave on the electrocardiogram to avoid interference with A-wave and V-wave on the venous pressure curve, and corrected for body surface area. Pre- and post-hemodialysis levels of the plasma alpha-h-ANP and cGMP were measured by radioimmunoassay. The relationship between VCD, CI determined by echocardiography, and alpha-h-ANP and cGMP concentrations were studied. Results: The levels of alpha-h-ANP and cGMP were markedly elevated before hemodialysis and significantly lower values were found after hemodialysis (alpha-h-ANP: 162.7 102.6 pg/ml vs 90.6 61.0 pg/ml, cGMP: 35.3 8.8 pmol/ml vs 21.3 6.2 pmol/ml). A significant correlation was found between VCD and alpha-h-ANP before (r=0.81, p<0.05) and hemodialysis (r=0.65, p<0.05). No such significant correlation was observed between CI and alpha-h-ANP levels. Furthermore, a significant correlation was observed between VCD before hemodialysis and the change in alpha-h-ANP during hemodialysis (r=0.64, p<0.05). The relationship between VCD and cGMP before hemodialysis was not significant (r=0.26, p>0.05) and also no relation was observed between the decrease of cGMP during hemodialysis and VCD before hemodialysis (r=0.12, p>0.05). A significant correlation between the percent change in body weight and the percent change in VCD during hemodialysis (r=0.91, p<0.05) and also significant relation was observed between the pecent change in body weight and the percent change in alpha-h-ANP levels (r=0.40, p, 0.05). Conclusion: Echocardiography of the inferior vena cava allow an estimation of changes of intravascular volume in ESRD patients without cardiac filling impairment as shown by the correlation to other indices of intravascular volume, such as alpha-h-ANP. In this study, CI and cGMP levels were less informative. Inferior vena cava echocardiography is noninvasive and easily available and serial measurements of VCD and alpha-h-ANP levels allow an estimation of chages of intravascular volume in FARD patients on maintenance hemodialysis.
포스터 전시 : 위장관 ; 십이지장 및 대장 침습을 동반한 후복막강 역분화 지방육종 1예
도윤경 ( Yun Kyung Do ),노태묵 ( Tae Mook No ),전재현 ( Jae Hyun Chyun ),김세환 ( Sae Hwan Kim ),김현수 ( Hyun Su Kim ),신동건 ( Dong Gun Shin ),김원호 ( Won Ho Kim ) 대한소화기학회 2002 대한소화기학회 춘계학술대회 Vol.2002 No.-
<배경> 육종의 15%를 차지하는 후복막강 육종은 가장 흔한 조직형이 지방육종이고, 이 중 40~50%가 저등급 육종인 점액성 지방육종(Myxoid Liposarcoma)이다. 역분화 지방육종(Dedifferentiated liposarcoma)은 드문 조직형으로 오랜 이환 기간동안 저등급에서 고등급 종양으로 진행되어 가며, 따라서 저등급 부위와 고등급 부위가 공존하는 조직형을 일컫는다. 연자들은 후복막강 종양에서 점액성 지방육종으로 진단된 환자에서,
신동건,김성호,권태환,조동규,이재태,이규보,김영욱 대한내과학회 1990 대한내과학회지 Vol.38 No.3
Thirty-four CAPD patients underwent peritoneal scintigraphy utilizing ^(99m)Tc-sulfur colloid. Patients were divided into three groups. Group 1(23 cases) had no complications secondary to CAPD. In 20 of these, radiocolloid was distributed evenly after the end of infusion, and an even distribution was maintained throughout the whole dwelling time. The average recovery rate of radioactivity from the drained dialysate was 70.7%. Three cases in group 1 had a poor radiocolloid recovery rate(21%), and their scintigram and postevacuation images showed multifocal accumulation of radiocolloid after three hours of ambulation. Its clinical significance was undetermined. Group 2(6 cases) had abnormal physical findings presented as external genital swelling(3), abdominal wall swelling(2), or leakage from exit-site(1). Scintigrams were abnormal in two patients with genital swelling and provided localizing information that aided in the management of leakage. In one instance of abdominal wall swelling, peritoneal scintigraphy demonstrated leakage from the previous operation site. Group 3 (5 cases) consisted of patients with recurrent peritonitis. Scintigrams were normal in all patients. No side effects or complications associated with the technique were observed. In conclusion, peritoneal scintigraphy with radiocolloid is a safe, non-invasive method of imaging of the peritoneal cavity and can be used effectively for the assessment of complications related to CAPD procedure.