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전용진(Chun Yong-Jin) 한국산학기술학회 2007 한국산학기술학회 학술대회 Vol.- No.-
콘크리트 중의 철근이 염분에 의해 부식되는 것을 억제 또는 예방하고, 각종 부식 환경으로부터 구조물의 수명을 연장할 목적으로 사용되는 방청혼화제의 최적 formulation과 그에 대한 물성 및 성능 시험을 실시하였다. 철근 부식에 대한 방청 메카니즘의 이해와 방청 혼화제의 formulation에 따른 물성 시험과 성능평가를 실시하여 최적 조건을 확립하였다. 성능평가는 콘크리트 공시체의 Slump, 공기량, 압축강도(3일, 7일, 28일) 측정과 함께 염수침지시험 등의 방청성능 평가를 실시하였다.
주식시장 개방과 외국인 투자 행태 및 성과에 관한 연구
전용수(Yong-Soo Chun),태석준(Suk-Joon Tae) 인하대학교 산업경제연구소 1993 경상논집 Vol.7 No.-
This paper examines the effects of the stock market opening on the domestic capital and financial markets, and analyzes the relationships between the amount of stock purchase by foreign investors and the movement of KOSPI(Korea Comosite Stock Price Index), and investment behavior and performance of the foreign investors. Since the stock market opening in January 1992, the flow of foreign capital for stock investment has not caused problems in monetary control, and its influence on domestic foreign exchange market has been trivial. After the opening of the stock market, rational investment patterns based on the intrinsic value of the company is expanding, and the inflow of foreign capital has had positive effects on the domestic stock market. The results of the causality test between the KOPSI and the amount of stock purchase by foreign investors indicate that the movement of KOSPI influenced the stock purchase of the foreign indicate that the movement of KOSPI influenced the stock purchase of the foreign investors, and not vice versa. Foreign investors show investment pattens emphasizing profitability and stability of the companies, and especially the profitability seems to be the major factor for foreign investors in selecting stock. Although the weighted average daily return of the foreign investors, during the period between January 3 and September 30, 1992, turned out to be negative, it was slightly higher than the daily average return of KOSPI. The weighed average daily excess return and the cumlative weighed average excess return for the roreign investors indicate that the performance of the foreign investors was better than that of As the Korean stock market. recovers, the investment of foreigners in Korean stock market will be augmented further and the influences of foreign investment on domestic stock market are expected to be increased. the market index. However, this analysis on investment performance uses the foreign investment data of only one securities company. In addition, 9 month-period is not long enough to give meaningful results.
전용석(Yong Suk Chun),원석규(Seok Kyu Won),이명의( 대한통증학회 1998 The Korean Journal of Pain Vol.11 No.1
The presence of an enlarged transverse process on one or both sides of the last lumbar vertebra is a common congenital anomaly of the lumbar vertebra. It is thought to be a genetic or developmental anatomical variant. The first reported assimilation of the fifth lumbar vertebra into the sacrum associated with low back pain was in 1917 by Bertolotti. However, clinical significance of lumbosacral transitional vertebra has not been fully considered due to lack of scientific investigations dealing with it. We experienced a case of symptomatic lumbosacral transitional vertebra during management of low back pain. Low back pain was relieved after infiltration of local anesthetics and steroid into the false joint of lumbosacral transitional vertebra. This result may possibly indicate a significant correlation between low back pain and lumbosacral transitional vertebra.
전용순(Yong Soon Chun),김선희(Sun Whe Kim),윤용범(Young Bum Yoon),박용현(Young Hyun park) 대한소화기학회 1994 대한소화기학회지 Vol.26 No.3
N/A Choledochal cyst is not so rare in the far east Asian countries as in the western countries. Reflux of pancreatic juice to the bile duct through anomalous pancreatobiliary ductal union (APBD) is considered as one of the important etiologic factors. To study the clinical charac- teristics of choledochal cyst in adults and the significance of APBD and reflux of pancreatic juice into bile duct in this disease, we reviewed 57 choledochal cyst cases. APBD is defined as long common channel(>1.5cm) and we interpreted as presence of pancreatic juice reflux if bile amylase was greater than 600 IU/dl. Ages ranged from 16 to 72 years and the fourth decade was the most prevalent. One third of the patients had all triad symptoms-abdominal pain, mass and jaundice. Diagnosis was made by ultrasonography and cholangiography in most of the cases, and preoperative diagnosis was rnade in 82%. Gallstones were associated in 45.6% of the cases (26 cases) and biliary tract malignancy in 8.8% (5 cases). Three of the latter patients expired within 1 year aft.er operation. Todani type I(68.4%), and IV(26.3%) are the two most common types. Long common channel was found in 65% of the cases (11/ 17) and bile amylase was above 600 IU in 78.6% of the cases (22/28). Forty six patients were followed up for a median period of 6.5 years after initia] operation. Among 17 patients who underwent cystojejunostomy, pancreatitis or cholangitis developed in 3 patients and 1 case expired due to periampullary cancer 1 year after operation and 1 case developed CBD cancer and expired 10 months after a second operation. Among 21 patients who underwent cyst excision, 5 patients suffered frorn cholangitis or pancreatitis. In conclusion, choledochal cyst in adults is frequently associated with other biliary tract disease, the most significantly biliary tract malignancy. APBD seems to play an important role in the pathogenesis of choledochal cyst, especially type Ia and 1V. Excision of the cyst is the procedure of choice for the treatment because it eliminate APBD and potentials to develop malignancy or preexisting malignancy. (Korean J Gastroenterol 1994; 26: 549 560)