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99mTc - phytate 간스캔을 이용한 간 경변증의 예후 평가
박성기(Sung Ki Park),변종훈(Jong Hoon Byun),양수현(Soo Hyun Yang),박봉철(Bong Chul Park),채동호(Dong Ho Che),조준구(Jun Koo Cho),송태원(Tae Won Song) 대한핵의학회 1991 핵의학 분자영상 Vol.25 No.1
N/A To evaluate the prognostic significance of 99mTc-phytate liver scintigraphy in patients with cirrhosis, we measured the grade of extrahepatic uptake (EHU) of 99mTc-phytate, from 0 (absent EHU) to 5 (irnportant EHU), according to the relative distribution of the radiotracer among liver, spleen and bone marrow. The results were as follows: 1) EHU score was correlated to the Pugh score (r=0.64) and to survival. 2) The ROC curve on an observed status of death was superior for EHU score. In conclusion, 99mTc-phytate liver scintigraphy may be a useful prognostic method in patients with liver cirrhosis.
박성기 ( Sung Ki Park ),이정엽 ( Jung Yup Lee ),김신윤 ( Shin Yoon Kim ) 대한고관절학회 2009 Hip and Pelvis Vol.21 No.4
Various materials of artificial bearing surfaces are developed and applied to reduce wear and osteolysis and to improve the survival rate of total hip arthroplasty. The survival rate of artificial joint is affected by mechanical properties and biological response. The wear rate of alternative bearing surfaces as ceramic-on-ceramic, metal-on-metal, highly cross-linked polyethylene decreased significantly compared with conventional polyethylene, but long-term results are still under follow-up and several problems have been unsettled. Particularly acetabular component should be in appropriate position to reduce complications. Each bearing surface should be selected considering age, activity, obesity, underlying disease, and socio-economic state of patients because it has its own pros and cons.
배양된 정상 갑상선세포에서 LECTIN 에 의한 HLA - DR 항원 발현에 관한 연구
박성기(Sung Ki Park),이명식(Myung Shik Lee),조보연(Bo Youn Cho),고창순(Chang Soon Koh),이문호(Mun Ho Lee),차창룡(Chang Young Cha),황응수(Eung Soo Hwang),오승근(Seung Keun Oh) 대한내과학회 1988 대한내과학회지 Vol.35 No.5
N/A Although it has been suggested that HLA-DR Ag expression in thyrocytes by nonspecific immune stimuli such as lectin may play an important pathogenetic role in autoimmune thyroid diseases, its precise mechanism has not been established. The purpose of this study is to investigate a part of the mechanism and features of lectin-induced expression of HLA-DR antigenicity in cultured normal thyrocytes. By an indirect immunofluorescence method using monoclonal anti-HLA-DR Ab, this study was performed to assess the effects of various lectins, as well as the effects of culture duration, cyclosporine, prostaglandin E₂, and gamma-interferon on HLA-DR Ag expression in cultured normal thyrocytes, and also to compare cytoplasmic and surface expression of HLA-DR Ag. The results were summarized as follows: 1) In 5 separate experiments with normal thyrocytes cultured with 10 mg/ml leucoagglutinin, HLA-DR Ag was detected on the 2nd day of culture. The expression rate increased to a maximum on the 7th to 9th day of culture and decreased thereafter. 2) The positivity of HLA-DR Ag expression by T-cell specific mitogenic lectins was 60% in the cultured cells with 2 mg/ml phytohemagglutinin, 60% in those with 10 mg/ml concanavalin A, and 50% in those with 10 mg/ml leucoagglutinin on the 7th day of culture, There were no significant changes of HLA-DR Ag expression in higher concentrations. HLA-DR Ag was expressed in 40% of cultured thyrocytes with 100 mg/ml pokeweed mitogen but HLA- DR Ag expression was not induced by lipopolysaccharide, which is not a T-cell mitogenic lectin. 3) Leucoagglutinin-induced expression of HLA-DR Ag was reduced by cyclosporine which suppresses secretion of lymphokines from T-lymphocyte, but not by prostaglandin E₂, which suppresses HLA-DR Ag expression in macrophages. 4) Gamma-interferon-induced expression of HLA-DR Ag was not reduced by cyclosporine. 5) HLA-DR Ag expression was not induced by hormones such as TSH, insulin and hydrocortisone. 6) In normal thyrocytes cultured with concanavalin A or leucoagglutinin, the HLA-DR Ag expression rates in the cytoplasm and cell surface were nearly similar. These results, that HLA-DR Ag expression was induced by T-cell mitogenic lectin but suppressed by cyclosporine (inhibitor of gamma-interferon synthesis in T-lymphocyte) and that the expression rates in the cytoplasm and cell surface were nearly similar suggest that the T-lymphocyte is involved in lectin-induced expression of I-ILA-DR Ag in cultured normal thyrocytes and that HLA-DR Ag is produced in the cytoplasm of thyrocytes.
중등 체육교사의 운동부 담당에 따른 역할갈등의 근거 이론적 접근
박성기(Sung Ki Park),김성훈(Sung Hoon Kim),이안수(An Su Lee) 한국스포츠교육학회 2012 한국스포츠교육학회지 Vol.19 No.1
본 연구는 중등학교에서 운동부를 담당하는 체육교사들이 겪는 역할갈등을 심층적으로 분석하고, 그러한 역할갈등의 대처방안을 알아보는 것이 목적이다. 연구 참여자는 A광역시 소재의 중학교 체육교사 4명, 고등학교 체육교사 1명이 선정되었으며, 심층면담과 참여관찰, 관련문서들을 통해 자료가 수집되었다. 운동부를 담당하는 체육교사들이 겪는 역할갈등의 대처과정을 심층적으로 알아보기 위해 근거이론 방법을 사용하였다. 연구결과 하위범주 15개, 상위범주 9개가 도출되었다. 중심현상을 유발시키는 인과적 상황은 두 마리 토끼를 쫓는 생활이라는 측면에서 체육교사와 감독으로서의 어려움이 나타났다. 이들에게 영향을 미치는 맥락적 상황은 학교관리자, 가족, 학부모 등과의 관계형성에서 오는 어려움과 운동부에 대한 부정적 인식으로 나타났다. 또한 중심현상과 관련하여 상호작용을 촉진하는 중재적 상황은 감독에 대한 배려, 협회의 올바른 변화라는 제도적 측면과, 운동부를 지도하는 체육교사들의 열정, 자신의 역할 재인식, 긍정적인 생각이라는 정신적 측면으로 분류되었으며, 상호작용 전략으로는 적극적인 역할수행, 중요 타자들과 우호적 관계 형성하기라는 적극적인 측면과, 관리자들이 주는 스트레스에 대해 체념하기, 구시대적인 훈련방법 선택하기라는 소극적인 측면으로 나타났다. 이와 같은 방법으로 역할갈등에 대처한 결과 연구 참여자들은 역할갈등의 해소와 역할갈등의 지속이라는 상반된 적응과정을 경험하는 것으로 도출되었다. 체육교사이자 운동부 감독이라는 과중한 책무로부터 비롯되는 역할갈등이 극복될 수 있도록 제도적 개선과 같은 보다 적절하면서 다각도의 노력이 이루어 질 때 학교교육은 보다 더 발전될 수 있을 것이다. The purposes of this study were to analyze the teacher/coach role conflict and find out how one can deal with it. Participants in the research consisted of four physical education teachers in middle schools and one physical education teacher in a high school in "A" Metropolitan City, South Korea. The data were collected through participant observation and in-depth interviews. Main concepts and their interrelationships were identified through the process of analyzing the data gathered from physical education teachers experiencing the role conflict by grounded theory method. Results indicated that 94 concepts were derived from the research on the teacher/coach role conflict, and those concepts were grouped into 15 subcategories and then again into 9 parent categories. The main phenomenon turned out to be caused by the hectic daily routines and stress from chasing two rabbits at the same time. The contextual situations that affect this phenomenon are the difficulty in situational relations with people. The arbitration situations that help ease the main phenomenon are consideration for the physical education teacher/coach. Active coping strategies include thinking positively, redefining one`s roles, and forming positive relationships with important others. Passive strategies include giving up the effort to keep up with the demand of those people at the managerial level and adopting old-fashioned way of training the student-athletes. By using these strategies some participants resolved his or her role conflict while others didn`t. Multilateral efforts for institutional improvement in secondary physical education to relieve a physical education teacher of his or her excessive responsibility as a physical education teacher/coach will be rewarded with better educational outcomes.