만성 간 질환에서 Thallium-201 간 스캔의 단락지수(Shunt Index)와 간 조직 검사 소견에 대한 연구

유영조(Young Jo Yoo),정진웅(Jin Woong Jung),최춘식(Choon Sik Choi),전대원(Dae Won Jeon),이오영(Oh Young Lee),최호순(Ho Soon Choi),윤병철(Byung Chul Yoon),함준수(Joon Soo Hahm),이민호(Min Ho Lee),최윤영(Yun Young Choi),홍은경(Eun Kyun 대한내과학회 2000 대한내과학회지 Vol.58 No.2

Background : The disturbances of portal circulation in chronic liver disease may cause hepatic failure, hepatic encephalopathy and variceal bleeding. The measure of porto-systemic shunt plays a significant role in the management and prognosis of the patients. So we have evaluated the relationship between the shunt index of thallium-201 liver scan and the histological grade and stage of chronic liver disease. Methods : The thallium-201 scintigraphy per rectum was evaluated in 159 patients with chronic liver disease, which were proven with percutaneous liver biopsy. We used the heart to liver activity ratio at 20 minute as shunt index, representing portal-systemic shunt. The two pathologists scored independently hepatitis activity (lobular and porto-periportal activity) and stage (fibrosis). Results : A significant difference was noted between the shunt index and the scores of fibrosis (p<0.001) although this correlation was statistically weak (r=0.26, p=0.008). In cumulative logistic regression test, the shunt index had a effect on the fibrosis (p<0.001) but not on the lobular and porto-periportal activity. Fibrosis was predicted as less than 2 if shunt index was less than 0.24, 3 if more than 0.24 but less than 0.46, 4 if more than 0.46. Conclusion : The shunt index of thallium-201 liver scintigraphy correlated only with fibrosis not with lobular and porto-periportal activity. As the fibrosis progresses in chronic liver disease, portal hypertension becomes more severe and the shunt index increases. Thallium-201 liver scan may be useful for evaluation of hepatic fibrosis instead of invasive liver biopsy in predicting the histological stage (fibrosis) of advanced chronic liver disease.(Korean J Med 58:152-160, 2000)

저전압 대전류 LLC 공진형 컨버터를 이용한 그린 PC용 전원공급장치 설계

유영도(Young-Do Yoo),김인동(In-Dong Kim),노의철(Eui-Cheol Nho),류명효(Myung-Hyo Ryu),백주원(Ju-Won Baek) 전력전자학회 2014 전력전자학회 논문지 Vol.19 No.3

한국농업의 기술변화에 대한 생산물편향성 분석

유영봉 ( Young Bong Yoo ) 한국농업경제학회 1993 農業經濟硏究 Vol.34 No.1

原發性 3重複癌

劉榮晩(Young Mann Yoo),李赫相(Hyueksang Lee),白樂晥(Nak Whan Paik) 대한외과학회 1986 Annals of Surgical Treatment and Research(ASRT) Vol.30 No.4

남북한 동질성 회복을 위한 교육정책의 방향

유영옥(Yoo Young-ock) 한국국학진흥원 2007 국학연구 Vol.10 No.-

남북한의 동질성을 회복하기 위해서는 여러 가지 방법이 있을 수 있지만 남북한 사회의 성장세대가 어떠한 교육을 통하여 어떠한 인간으로 길러지고 있는가를 비교ㆍ분석해 보는 일이 선행되어야 할 것이다. 왜냐하면 한 사회에 있어서 정치ㆍ경제ㆍ사회ㆍ문화적 발전의 과정에 참여하는 주체로서의 인간이 갖고 있는 사랑은 일반적으로 그 사회의 제도적 혹은 비제도적 교육을 통해 많은 부분이 형성되기 때문이다. 그러므로 남북한이 물리적ㆍ정치적 통일을 넘어 동질성 확보를 통한 인간의 통일을 이룸으로써 진정한 의미의 통일을 실현하는 데 있어서 기장 중요한 것이 교육이라 할 수 있다. 교육은 본질적으로 개인의 학식과 인격을 도야하는 기능을 수행하지만, 동시에 특정 사회체제를 유지하고 발전시키는 수단적 기능도 함께 지니고 있을 뿐만 아니라, 한 사회가 추구하는 문화체제의 지향이념을 표현하기 때문에 사회통합의 근간을 이루고 있다고 할 수 있다. 교육은 그 사회가 지향하는 가치와 규범을 사회구성원에게 전달하여 사회 속에서 자신의 역할을 할 수 있도록 준비시켜 주는 것이다. 그리고 교육이야 말로 인간의 내면적인 통일을 성취하는 기능을 수행하고 있기 때문에 남북한 주민들이 서로 이해하고 화합하면서 하나의 공동체를 형성하는 데 필요한 의식, 가치관, 태도를 형성하는 것은 교육이 해야 할 주요 기능이다. 따라서 교육이념과 목적, 교육내용과 방법 등에 있어서의 통일을 이루기 위해서는 상호 협력과 양보의 정신이 필요하다. To annex two separated bodies one, it is required to first determine the specific element of heterogeneity and homogeneity between them, and then reduce the heterogeneity while increasing the homogeneity by mutual comparison and analysis of the characteristic properties of each. In other words, actual unification requires a process of : comparison of each system expansion of commonalties and deemphasis on the differences recovery of homogeneity completion of unified system. More specifically, of the unification of South and North Korea, it is required to overcome the heterogeneity of politics, economics, administration, ideology, social culture, education, religion, and education through education. To accomplish this, it is necessary to connect the differentiated elements and develop them to homogeneous elements. The second stage, the expansion of commonalties, has begun to some extent with the limited initial efforts for economic, cultural and sports exchanges. These exchanges need to be gradually broadened in scope and size, and could expand to include radio and television broadcast exchanges, postal service between the two countries, and use of the Internet to provide ways for exchanges among individuals. These exchanges are symbols themselves as well as means of communicating other symbols of peace and unity. The most important aspect of this stage, however, concerns students. This study has examined the use of symbols in the textbook contents of all levels of the education systems in both the North and South, and their impact on the geterogeneity between the two. Gradual textbook reform in both countries is necessary to achieve real social unification.

주가지수선물과 옵션간 일중 차익거래전략에 관한 실증연구

유영중 ( Young Joong Yoo ),황성수 ( Sung Soo Hwang ) 상명대학교 산업과학연구소 2005 産業科學硏究 Vol.- No.18

This study explores arbitrage opportunities between the KOSPI 200 futures and options markets. The sample period covers from Jan 2, 2001 to December 30, 2003. For the empirical analysis model, this study used Put-Call Parity. The results of this study show that 93.65% of a total of 17,361 observations were fairly priced and the remaining 6.35% were either overpriced or underpriced. The arbitrage opportunities were found to violate lower bands more then upper bands.

피부 평골근육종 (平滑筋肉腫)

유영은(Young Eun Yoo),정태복(Tae Bock Chung),황선욱(Sun Wook Hwang),전인기(Inn Ki Chun),김영표(Young Pio Kim) 대한피부과학회 1983 대한피부과학회지 Vol.21 No.2

Leiomyosarcoma arising in the skin is rare tumor, and diagnosis usually is made microscopically. After local excision, these lesions recur in large proportion of pat ients. The authors herein report a 53-year-old male with leiomyosarcoma appeared in the skin of the right forearm and presenting as a dark reddish colored, 5*6cm in diameter, superficial ulcerated single firm nodule with intermittent pain. Histopathological examination showed poorly circumscribed tumor consisting of interlacing bundles of spindle shaped smooth muscle cells in the middle and lower parts of the dermis. The nuclei were hyperchromatic, large, vacuolated, and irregular in shape. Electron microscopic findings revealed cytoplasmic organelles such as rough endoplasmic reticulum and mitochondria of malignant smooth muscle cells in the paranuclear area, Characteristic subsarcoelmmal caveolae and dense plaque were noted and myofilaments were distributed in the peripheral cytoplasm. The tumor did not recur in 10 months' follow-up.

소아전염병 표본감시체계의 구축 및 운영결과

유영옥(Young Ohk Yoo),정은경(Eun Kyeong Jeong),박옥(Ok Park),천병철(Byung-Chul Chun) 한국역학회 2004 Epidemiology and Health Vol.26 No.2

Purpose: The purpose of this study is to review the process for establishing a pediatric communicable diseases sentinel surveillance system, and the results of operation based on the accumulated data to understand the descriptive epidemiologic characteristics of pediatric communicable diseases. Methods: A sentinel surveillance system for pediatric communicable diseases was developed in May 2001 with the 202 doctors in pediatric clinics who participated voluntarily. The target diseases for sentinel surveillance were measles, mumps, rubella, chicken pox and aseptic meningitis. The case definitions of those diseases for surveillance were divided into confirmed cases and suspected cases by the diseases definitions of national notifiable diseases system. The participants should report as soon as possible when they diagnosed measles, mumps, rubella cases including suspected ones. But chicken pox and aseptic meningitis cases were reported once a week in regular base including zero report. We collected the data from May 2001 to December 2003 and showed the descriptive epidemiologic characteristics of each disease. Results: The average reporting proportion among survellance doctors has been increased, about 88% in 2003. For measles, 206 cases were reported in 2001, 10 cases in 2002, and 2 cases in 2003. Children under the age of 2 (53.4 %) showed the highest. Among the measles cases, 86.4% had no previous vaccination history. In case of mumps, 246 cases in 2001, 241 in 2002, and 566 cases in 2003 were reported. Mumps showed seasonality, highest from April to June in each year. The sex ratio was about 1.5 (M:F = 6:4). Among the reported cases, 76.9 % had previous MMR immunization history at least one time. For Rubella, 9 cases in 2001, 3 in 2002, and no case were reported in 2003. The chicken pox case proportion per 100 pediatric consultations showed peak in from May to June and from November to January. 3-5 year-old children (45.7%) were showed high proportion by age. Conclusion: This study described the process of establishing and operating a system for the pediatric communicable disease sentinel surveillance. We analyzed the desriptive epidemiologic characteristic of the reported data from May 2001 to December 2003. These data maybe useful to build the policy of public health management for communicable diseases control system and vaccine preventable diseases.

교량 점검진단의 제안 보수물량과 실제 보수물량의 편차 분석

유영달 ( Yoo Young-dal ),조은식 ( Cho Eun-sik ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.1

교량은 주요한 사회기반시설 중 하나로서 “시설물의 안전 및 유지관리에 관한 특별법”에 의하여 점검이 이뤄진다. 점검의 결과로 산출된 손상 물량은 정해진 비율로 할증되어 개략 공사비에 반영된다. 하지만, 이렇게 정해진 비율의 할증에 의해 산정된 물량은 실제로 보수 시에 발생하는 물량을 잘 반영하지 못하고 있다. 이 연구에서는 교량관리시스템의 최근 5년 점검, 보수이력 데이터를 수집하여 유지관리정보 항목 구분에 따른 제안 보수물량 할증율 편차에 대해서 상세하게 살펴보고, 더 나아가 손상 종류, 교량 형식, 교량 부재 등에 따른 적절한 할증율 및 물량 산정 방안을 제시하고자 한다.

1.5 ㎛ InGaAs/InGaAsP/InP 양자점 Superluminescent Diode의 광 특성

유영채(Young-Chae Yoo),이정일(Jung-Il Lee),김경찬(Kyoung-Chan Kim),김은규(Eun-Kyu Kim),김길호(Gil-Ho Kim),한일기(Il-Ki Han) 한국진공학회(ASCT) 2006 Applied Science and Convergence Technology Vol.15 No.5

MOCVD로 성장된 InGaAs 양자점을 이용하여 1.5 ㎛의 발광파장을 갖는 고휘도 발광소자(Superluminescent diode, SLD)를 제작하였다. 상온에서 SLD의 광출력은 CW 3 ㎽ 였고, 3?㏈ 파장대역폭은 55 ㎚ 이었다. Superluminescent diodes (SLD) with the emitting wavelength of 1.55 ㎛ was fabricated on InGaAs quantum dot structure grown by MOCVD. The output power and 3-㏈ bandwidth at room temperature and continuous wave operation were 3 mw and 55 ㎚, respectively.