영아 담도폐쇄증 진단에서 Tc-99m DISIDA 간담도주사와 경피간침생검의 의의

김우석,박우현,최순옥,김상표,Kim, Woo-Suk,Park, Woo-Hyun,Choi, Soon-Ok,Kim, Sang-Pyo 대한소아외과학회 1997 소아외과 Vol.3 No.1

본 저자들은 1992년 3월부터 1996년 4월까지 신생아 울체성 황달의 감별진단, 특히 신생아담도폐쇄증과 신생아 간염의 감별진단에 있어 Tc-99m DISIDA 간담도주사와 경피간침생검을 시행하여 다음과 같은 결과를 얻었다. 질환별로 볼 때 전체 60예의 환아 중에서 담도패쇄증이 23예, 신생아 감염이 34예였으며 경정맥고영양법으로 인한 황달이 2예, Alagille 증후군이 1예였다. Tc-99m DISIDA 간담도주사는 60명의 환아를 대상으로 실시하였다. BA 진단에 대한 민감도와 특이도는 각각 96%와 32%로서 높은 민감도를 보인 반면 특이도는 낮게 나타났으며 전체적인 진단 정확도는 57%였다. 경피간침생검은 Tc-99m DISIDA 간담도주사를 실시한 60명의 환아중 장관내 방사능이 나타나지 않았던 38명의 환아에서 40회 실시하였는데, 경피간침생검에 BA 진단에 대한 민감도는 88%, 특이도는 96%로 모두 높았으며 전체적인 진단 정확도는 93%였다. 본 연구를 요약하면 Tc-99m DISIDA 간담도주사는 특이도 32%, 양성예측율 47%로서 Tc-99m DlSIDA 간담도주사에서 장관내 방사능이 배설이 되지 않을 때는 경피간침생검이 반드시 필요하리라 생각되며, 일단 장관내 방사능이 배출되면 BA는 배제할 수 있으리라 생각된다. 경피간침생검은 전체적인 진단율이 93%로 높으나, BA 환아에서 8주전에 경피간침생검시는 NH와 감별이 어려울 수 있으며, 또 일부 NH, 경정맥고영양법 관련 울체성 황달에서는 경피간침생검시 BA와 감별이 어려울 수 있으므로, 임상경과를 보아서 의심스러우면 재 경피간침생검을 시행하던지 타 진단법을 응용해서 참고하여야 할 것으로 생각된다. To differentiate biliary atresia from intraheaptic cholestasis, Tc-99m DlSIDA hepatobiliary scintigraphies and percutaneous needle biopsies of 60 consecutive infants were evaluated retrospectively. Twenty three patients had biliary atresia and 37 patients intraheaptic cholestasis(neonatal hepatitis 34, TPN induced jaundice 2 and Dubin-Johnson syndrome 1). All sixty patients underwent Tc-99m DlSIDA hepatobiliary scintigraphy with phenobarbital pretreatment. Of 23 patients with biliary atresia, 22 were correctly interpreted showing 96% sensitivity while of 37 patients with intraheaptic cholestasis, only 12 had intestinal excretion of radionuclide showing 32% specificity. Among the forty needle biopsies, 17 of biliary atresia and 23 of intrahepatic cholestasis, 37 were correctly interpreted as either having biliary atresia or intrahepatic cholestasis. The overall diagnostic accuracy was 93%. Of 3 misdiagnosed cases, the histologic findings of two patients with biliary atresia(aged 43 days and 54 days at the first needle biopsy) were essentially the same as those of neonatal hepatitis. Follow-up biopsies, however, showed findings consistent with biliary atresia. The third one(VLBW premie with history of 8 weeks of TPN) showed mild ductal proliferation and portal fibrosis. This was interpreted as suspicious for biliary atresia. Jaundice resolved gradually. In summary, patients who have intestinal excretion of radionuclide on Tc-99m DlSIDA hepatobiliary scintigraphy, biliary atresia can be ruled out. But the patients who do not have intestinal excretion of radionuclide should have further investigation by needle biopsy. Judicious use of Tc-99m DISIDA hepatobiliary scintigraphy and percutaneous needle biopsy can give a diagnostic accuracy of 95% or more in cases of infantile cholestasis.

복합섬유로 보강된 순환골재 콘크리트의 성능평가에 관한 연구 사례 고찰

김우석,곽윤근,Kim, Woo-Suk,Kwak, Yoon-Keun 한국복합신소재구조학회 2015 복합신소재학회논문집 Vol.6 No.2

순환골재를 사용한 고강도 철근콘크리트보의 휨거동에 관한 연구

김우석,여진동,곽윤근,강현구,홍성걸,Kim, Woo-Suk,Yeo, Jin-Dong,Kwak, Yoon-Keun,Kang, Thomas H.K.,Hong, Sung-Gul 대한건축학회 2012 대한건축학회논문집 Vol.28 No.3

Currently, approximately 90% of waste concrete is being used solely for landfills. Of the total waste concrete only about 14% is made into aggregate and recycled. Such usage is a very low-efficiency method of recycling these materials, under-utilizing an important and valuable asset. Common engineering practice has thus far failed to promote the design of structural members using recycled aggregates. Moreover, appropriate structural design standards for such materials have not been established, despite the number of domestic research studies which have been, and are being, conducted. Such practices overlook the fact that the recycling of aggregate from demolished concrete structures is both structurally and economically beneficial. In making full use of recycled concrete aggregates (RCA) it is necessary to understand its mechanical properties such as compressive, tensile and flexural strengths, and bond strength, as well as its structural performance. The main objectives of this research study are the investigation of flexural performance and the evaluation of the potential applications of RCA on concrete structures. For this, flexural tests of 12 reinforced high-strength concrete beams with RCA were performed. The current test data were examined in terms of flexural strength, along with the data from previously tested reinforced concrete beams with RCA. It is anticipated that this research will play a role of establishing the structural design standards for concrete members with RCA.

비분산 적외선 분광법을 이용한 Co₂농도 고속 분석기의 Sampling Module 특성에 관한 실험적 연구

김우석,손덕영,박영무,유재석,이종화,Kim, Woo-Seok,Shon, Deok-Young,Park, Young-Moo,Yoo, Jae-Suk,Lee, Jong-Hwa 대한기계학회 2003 大韓機械學會論文集B Vol.27 No.3

A fast response analyzer for measuring carbon dioxide concentration has been developed for transient characteristic and researches tested on internal combustion engine. The analyzer uses the well known NDIR(Non-Dispersive Infrared) method with miniaturized detection system, giving a time constant of approximately 30 microsecond, and sampling module consists of capillary tube. Since the transit time and the time constant of the sampling system depend on the sampling conditions, it is necessary to investigate the characteristics of sampling system before applied to exhaust gas measurement in engine. A unique method was designed to study the influence of the diameter of transfer sample line and operating conditions of the FRNDIR on transit time and time constant. A database of transit time and time constant was built up for different measured and simulated pressure conditions. The database can be used for correcting eventual $CO_2$ concentration measurement.

생활체육지도자 특성에 따른 다문화수용 태도에 관한 차이연구

김우석(Kim, Woo-Suk),한광령(Han, Kwang-Leoung),김기섭(Kim, Ki-Sup) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.5

The purpose of this study is to look into the difference in cultural receptive attitude toward understanding the belief and sentiment as to the cultural difference such as multi-culture receptiveness, a sense of social distance, and foreigners" stereotypes consequent on a director of Sport for AU. In an effort to achieve such research purposes, this study selected the directors of Sport for AU who belong to the Korea Council of Sport for All as a population and did sampling of 460 directors of Sport for All, who participated in "the 2011 Job Training for Directors of Sport for All", using simple random sampling, a kind of probability sampling. This study used a questionnaire as its research tool, and explained the intent of the research, purpose of each question and how to do filling-up; then, after getting survey subjects to respond to each question with a self-adminstration method, this study used a total of 435 copies of the collected questionnires for this research excluding the data judged to be unfaithfully responded, and 25 respondents" data in which a part of survey contents was left out. data processing, For his study conducted frequency analysis, factor analysis, reliability analysis, SPSS Windows 18.0 Version, conducted independent t-test and one-way ANOVA. Thus, this study was able to draw the conclusions as follows: First, the difference in multi-culture receptiveness consequent on the characteristic of a director of Sport for All was found to assume a significant difference in aiming for multi-culture, coaching events, whether to have a command of a foreign language, whether to have an experience in guiding foreigners, and guidance careers. Second, the sense of social distance consequent on the characteristic of a director of Sport for All was found to assume a significant difference in a sense of physical distance, guidance career, and age while the sense of interpersonal distance assumed a significant difference in coaching event, whether to have a command of a foreign language, and age. Third, as for the difference in stereotypes against foreigners consequent on the characteristic of a director of Sport for All, it was found that positive sentiments assume a statistically significant difference in age, and guidance in age and in the sentiments of anxiety and discomfort, and whether to have a command of a foreign language, and guidance careers in career, age and unpleasant sentiments were found to assume a statistically significant difference respectively.

하이브리드섬유보강 자기충전 콘크리트의 재료성능 평가에 관한 연구

김우석(Kim, Woo-Suk),안재형(Ahn, Jae-Hyung),이형주(Lee, Hyung-Joo) 한국콘크리트학회 2015 한국콘크리트학회 학술대회 논문집 Vol.2015 No.10

남성 생활체육지도자의 성태도가 감정분화 및 성폭력 인식에 미치는 영향

김우석(Kim, Woo-Suk),한광령(Han, Kwang-Leoung),김기섭(Kim, Ki-Sup),윤영준(Yoon, Young-Jun) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.6

This paper aims to examine the influence of community male physical education instructors’ sexual attitude on emotional differentiation and awareness of sexual violence. To that end, research questions were set as follows. First, how is the influence of community male physical education instructors’ sexual attitude on emotional differentiation? Second, how is the influence of community male physical education instructors’ sexual attitude on awareness of sexual violence? Third, how is the influence of community male physical education instructors’ emotional differentiation on attitude about sexual violence? Randomly sampled as subjects are 350 community male physical education instructors, who belonged to National Life Sports Association and that had one year experience in working at community’s public sports facilities and commercial sports facilities in Seoul and Gyeonggi region. A questionnaire was used for the survey. 329 effective answered copies of questionnaire were analyzed, using frequency analysis, reliability analysis, factor analysis, correlational analysis, and multi regression analysis. The research findings revealed this: First, male physical education instructors’ sexual attitude partially influences emotional differentiation. Second, male physical education instructors’ sexual attitude partially influences awareness of sexual violence. Third, male physical education instructors’ emotional differentiation partially influences awareness of sexual violence.

체육학전공 대학원생의 연구과정에서의 윤리적 의사결정에 관한 연구

김우석(Kim, Woo-Suk),김기섭(Kim, Ki-Sup) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.4

This research aims to inquire into ethical decision making on the research activities of graduate school students majoring in physical education. In order to achieve this research purpose, the following research questions were established. First, how is the ethical sensitivity on the research activities of graduate school students majoring in physical education? Second, how is the ethical judgment on the research activities of graduate school students majoring in physical education? Third, how is the ethical decision on the research activities of graduate school students majoring in physical education? As the research method, narrative interviews and semi-structured questionnaire survey were conducted on the master"s and doctor"s course graduate school students, who were selected by purposeful sampling, of K University in Gyeonggi-do, and for the analysis on the data, the text analysis was conducted and the following results were derived. First, in the ethical sensitivity on the research activities of graduate school students majoring in physical education, the tacit cognition of research ethics, the degree course and career path direction, and the research environment and atmosphere were found. Second, in the ethical judgment on the research activities of graduate school students majoring in physical education, the reliance on the authority, locus of control on researches, the spontaneous will to the ethical researcher, leaming according to gradual experiences, and check and control among colleagues were found. Third, in the ethical decision on the research activities of graduate school students majoring in physical education, the subjective intuition, the realistic compromise with results, and the hierarchical decision were found.

이종 네트워크 내 다중 안테나를 이용한 간섭 정렬 기법

김우석(Woo Suk Kim),최성규(Seong Kyu Choi) 한국통신학회 2013 한국통신학회 학술대회논문집 Vol.2013 No.11

유소년 스포츠클럽의 참여만족에 따른 정서적 행동이 학문적 자아개념에 미치는 영향

김우석(Kim, Woo-Suk) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.2

The purpose or this research is to establish the effects of emotional behavior according to participation satisfaction of the students who participate in juvenile sports clubs on academic self-concept. For the research subjects. 5 juvenile sports clubs located in Gyeonggi-do were selected and questionnaires were distributed to a total of 250 children who were selected from them using the random sampling method of the non-probability sampling methods and, of the collected questionnaires, inadequate and incomplete questionnaires were excluded and a total of 232 questionnaires were used for the analysis. For the research tools, the questionnaires were used, and frequency analysis, reliability analysis, correlation analysis, and multiple regression analysis were conducted using SPSS Windows 18.0 Version, and the research results were derived. The research results are as follows. First, participation satisfaction of the juvenile sports club has effects on emotional behavior partially. Second, the three subordinate variables of participation satisfaction of the juvenile sports club all have effects on academic self-concept. Thirds, the four subordinate variables of emotional behavior of the students who participated in the juvenile sports club all have effects on academic self-concept.