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[1984년도 춘계총회 및 학술발표회 행사진행 및 발표논문요지] 흠함을 갖는 불연속 평판구조물의 안정성 연구
김시영,이선우,홍봉기 한국수산학회 1984 한국수산과학회지 Vol.17 No.3
木 論文은 不連續 平板構造物 그內部에 欠陷을 가질때 千涉에 依한 安定性 問題의 評價에 대해서 硏究한 바를 報告한다. 여기에 關係하는 종래의 硏究들은 대개 平滑平板等의 連續構造物 內部에 어떤 종류의 欠陷이 存在하여 그 附近에 局所的으로 降伏點을 초월하는 경우에 그 破壞要因인 許容限界應力評價를 爲하여 그 支配特性 媒介變數인 K値, COD, J積分値等이 報告되어 있으나 이들은 欠陷部의 境界가 압축을 받을때 그 部分에서는 全體變形및 J積分의 經路의 獨立性이 問題가 되고 또 精度面에서도 만족치 못하다. 그런데 特히 變位가 없는 접촉境界面에서 適用解析方法이 容易하며 大形高速電子 計算機 利用方法의 하나이고 精度가 뛰어난 BEM(境界要素法)으로 그 特性値를 구했다. 이를 檢定하기 爲하여 光彈性實驗을 병행하여 確認하고 또 지금까지 보고된 COD, J積分値의 式들을 壓縮이 아닌 境界部分에서 修正하여 그 計算例를 BEM 및 실험치와 비교하였다. 그리고 本實驗에 사용된 시험편은 RJ series이며 平面內에 壓縮分布荷重이 作用할때의 欠陷附近의 그 特性値들을 比較檢討하였다.
폐쇄성 수면무호흡 증후군에서 앙와위 자세시간과 수면관련변인 간 상관관계 분석
김시영,박두흠,유재학,유승호,하지현,Kim, Si Young,Park, Doo-Heum,Yu, Jaehak,Ryu, Seung-Ho,Ha, Ji-Hyeon 대한수면의학회 2017 수면·정신생리 Vol.24 No.1
목 적 : 폐쇄성 수면무호흡 증후군(obstructive sleep apnea syndrome, OSAS)에서 앙와위는 비앙와위보다 수면무호흡을 증가시키는 것으로 알려져 있다. 앙와위 자세시간(supine position time, SPT)과 OSAS의 무호흡-저호흡 지수(apnea-hypopnea index, AHI)의 관련성에 대해서 많은 연구가 있었으나, SPT가 OSAS에서 어떤 변수의 영향을 받는지는 알려져 있지 않다. OSAS에서 수면다원검사상 어떤 변수가 SPT과 관련이 있는지를 평가하였다. 방 법 : 수면다원검사로 진단된 치료받지 않은 365 명의 OSAS 남자 환자를 선정하였다. SPT($276.4{\pm}92.3$ 분)가 인구 통계학적 데이터, 수면구조 관련변수, OSAS 관련변수 및 심박변이도(Heart rate variability, HRV)와 상관관계가 있는지 분석했다. SPT에 영향을 주는 요인을 알아보기 위해 SPT에 대해 다중회귀분석을 시행하였다. 결 과 : 전체 대상군의 상관분석에서 SPT는 총수면시간(total sleep time, TST) (r = 0.443, p < 0.001)과 수면 효율(r = 0.300, p < 0.001)과 가장 유의한 상관관계가 있었고, 코골이 시간(r = 0.238, p < 0.001), 산소포화도 90 % 미만시간(r = 0.188, p < 0.001), AHI (r = 0.180, p = 0.001), 산소탈포화지수(oxygen desaturation index, ODI), (r = 0.149, p = 0.004), NN50 count(r = 0.137, p = 0.036)와 SPT 간에 유의한 상관관계가 있었다. 다중회귀분석 결과 SPT에 유의한 영향을 끼치는 요인으로 TST (t = 7.781, p < 0.001), 코골이 시간(t = 3.794, p < 0.001), AHI (t = 3.768, p < 0.001), NN50 count (t = 1.993, p = 0.047)가 있었다. 결 론 : SPT는 OSAS 관련변수보다 수면구조 관련변수와 더 높은 상관관계를 보였다. 특히 SPT는 TST과 AHI 뿐만 아니라 NN50 count와도 밀접하게 관련되어 있었다. 이것은 SPT가 OSAS의 심각도뿐만 아니라 수면구조와 심박변이도에 의해서도 결정될 가능성이 있음을 시사한다. Objectives: A supine sleep position increases sleep apneas compared to non-supine positions in obstructive sleep apnea syndrome (OSAS). However, supine position time (SPT) is not highly associated with apnea-hypopnea index (AHI) in OSAS. We evaluated the correlation among sleep-related variables and SPT in OSAS. Methods: A total of 365 men with OSAS were enrolled in this study. We analyzed how SPT was correlated with demographic data, sleep structure-related variables, OSAS-related variables and heart rate variability (HRV). Multiple linear regression analysis was conducted to investigate the factors that affected SPT. Results: SPT had the most significant correlation with total sleep time (TST ; r = 0.443, p < 0.001), followed by sleep efficiency (SE ; r = 0.300, p < 0.001). Snoring time (r = 0.238, p < 0.001), time at < 90% SpO2 (r = 0.188, p < 0.001), apnea-hypopnea index (AHI ; r = 0.180, p = 0.001) and oxygen desaturation index (ODI ; r = 0.149, p = 0.004) were significantly correlated with SPT. Multiple regression analysis revealed that TST (t = 7.781, p < 0.001), snoring time (t = 3.794, p < 0.001), AHI (t = 3.768, p < 0.001) and NN50 count (t = 1.993, p = 0.047) were associated with SPT. Conclusion: SPT was more highly associated with sleep structure-related parameters than OSAS-related variables. SPT was correlated with TST, SE, AHI, snoring time and NN50 count. This suggests that SPT is likely to be determined by sleep structure, HRV and the severity of OSAS.
전산의 사용에 따른 업무능률성 분석 : 경상북도 구미시청의 사례 The Case of Gu Mi City Hall, Kyong Sang Book Do
김시영,정우열 영남대학교 지역발전연구소 1998 새마을지역개발연구 Vol.23 No.-
Nowadays, the Local government have become extensive users of computing. The increase in computing use has been based on the assumption is a tool which enables agencies to increase their business efficiency. According to the analysis of the data collected from the Gu-Mi city local government, analysis in efficiency attributable to the use of computing are perceived by local government employees in term of work speed, accuracy, cost saving, service improvement, and sense of accomplishment. However, much uncertainty exists regarding the utilization of time freed, coordination of service delivery by the use of computing.
김시영,고근아,윤휘중,조경삼 대한내과학회 1991 대한내과학회지 Vol.40 No.3
The development of leukemia during pregnancy is uncommon. Since acute leukemia is potentially curable, best available regimen should be used. But management decisions are difficult and data is not so much. One important consideration is the potential effect of chemotherapy on fetus. This, 23 years old female patient was successfully treated for ALL from second trimester of pregnancy and deliverd a 2,500 male infant through normal vaginal delivery at the 36th gestational week.
비대상성 알콜성 및 바이러스성 간경변증사이의 혈소판 감소증 비교
김시영,김창섭,박창영,김병익,이화영,조용균,이상종,금동극,구은실,전우규,이영래,정을순,손정일 대한간학회 2000 Clinical and Molecular Hepatology(대한간학회지) Vol.6 No.2
Background/Aims: Thrombocytopenia is frequently found among patients with chronic liver disease, and its mechanism, especially among patients with decompensated liver cirrhosis had not been established. Therefore to elucidate the mechanism of thrombocytopenia, the relationship between thrombocytopenia and severity of hepatic dysfunction, splenomegaly was measured. We measured the peripheral blood components with splenic volume obtained from a computerized tomography of decompensated liver cirrhosis patients. Methods: We studied 103 patients who had been diagnosed with decompensated liver cirrhosis with esophageal varices and ascites from January 1982 to August 1999. We checked their counts of platelets, albumin, bilirubin, splenic volume, degree of esophageal varices, hepatic encephalopathy and ascites by retrograde methods. Results: In viral liver cirrhosis, thrombocytopenia and splenomegaly correlated well with disease severity but they didn't in alcoholic cirrhosis. Of special note, the platelet count was significantly lower and the splenic volume was larger in the Child C of viral cirrhosis patients group than in the alcoholic group(p$lt;0.05). Conclusion: When we compared decompensated alcoholic with viral liver cirrhosis patients, the degrees of thrombocytopenia and splenomegaly were much less in the former group. The factors for this phenomena are Splenic Pooling theory, Platelet-associated IgG, Thrombopoietin and Toxic Marrow. We suggest that splenomegaly is an important factor among these, but the mechanisms involved in the pathogenesis of this hematologic phenomena are not completely understood. Especially in alcoholic liver cirrhosis, many other factors may be involved, including the direct effect of alcohol to bone marrow, so further studies will be needed to establish whether a causal relationship exists.(Korean J Hepatol 2000;6:215-222)