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어린이에서 수술 중 엎드린 자세와 누운 자세에서의 심박수변이도의 비교
김혜경,김종성,김성덕,김희수,염명걸,백진우 대한마취과학회 2001 Korean Journal of Anesthesiology Vol.41 No.4
Comparison of Heart Rate Variability between the Supine and Prone Plsition during General Anesthesia in Children Hee-Soo Kim, M.D., Jin-Woo Baik, M.D., Chong Sung Kim, M.D., Seong Deok Kim, M.D. Myung0Kul Yum, M.D.^*, and Hae Kyung Kim, M.D.^?? Department of Anesthesiology, College of Medicine, Seoul National University ^*Department of Pediatrics, College of Medicine, Hanyang University ^??Department of Anesthesiology, College of Medicine, Inha University, Incheon, Korea Background: It is well known that the prone position affects hemodynamics. In this study, we investigate whether the prone position will affect the heart rate variability compard with the supine position. Methods: Sixty five pediatric patients were assigned to supine group (n = 36) and prone group (n = 29) according to position during surgery. The patients were indeced with thiopental and vecuronium and maintained with O_2-enflurane-N_2O. ECG data was collected for 15 minutes after saturation at the end tidal concentration of the inhalent agent. From the ECG data, power spectral analysis was performed and approximate entropy was calculated. Results: IN the prone group, low frequency power and ratio of low to high frequency power were lower and approximate entropy was higher than those in the supine group. Mean heart rate and blood pressure were no different between the two groups. Conclusions: IN the prone position, sympathetic autonomic activity and balance of the autonomic nervous system decreased. However the complexity of regulation of heart rate variability was maintained in the prone position. (Korean J Anesthesiol 2001; 41: 455~460)
糞尿와 都市 廢棄物과의 混合處理에 대한 硏究 (Ⅰ) : 肥料化를 中心으로한 實驗室的 考察 Experimental study for the fertilization
金熙鐘,金相烈,金秀生,孫晋彦,金燦國,成周慶,吳英敏 동아대학교 환경문제연구소 1977 硏究報告 Vol.1 No.1
우리나라에 있어서 都市廢棄物의 主인 糞尿와 固形廢棄物의 太宗인 無煙炭재를 同時에 效果的으로 處理할 수 있고 또한 堆肥化시킬 수 있는 好氣性 酸化方式의 最適條件을 얻기 위하여 生糞尿 및 煉炭재의 理化學的 및 生物學的 數値를 測定하고 이를 基礎로하여 上記 兩者를 混合處理 할수 있는 消化條件(溫度, 糞尿와 煉炭재의 配合比, 기타 固形物의 添加量, 注入되는 空氣量의 變化)에 따른 C.O.D., B.O.D.의 變化, 水分 및 電氣傳導度의 變化, 熱灼減量, N量의 變化 等을 硏究하였으며 이들 사이의 相關關係를 檢討하여 다음과 같은 結論을 얻었다. 1. 生糞尿에 固形廢棄物인 煉炭재나 紙類를 配合시켜 消化시키므로서 케이크속의 질소成分의 量을 增加 시킬수 있다. 2. 煉炭재의 配合은 糞尿의 消化速度를 增加 시킨다. 3. 糞尿의 處理를 위한 反應槽의 溫度는 50℃보다 60℃로 維持 시킬때 消化速度가 크다. 4. 反應槽의 溫度를 一定하게 했을때 空氣의 注入速度는 初期 反應時는 적게하고 後期 反應時는 크게 함이 效果的 이다. For the effective treatment and usable disposal of urban wastes in the area of Busan city, the composition of the nightsoil and anthracite bulky ash which is the main munic ipal solid wastes have been studied on the digestion of the compositive mixtures with the variable conditions that are ratio of compounding between nightsoil and ash, amount of solid additives and volume of air for the effective airation at 50, 65℃. The digestion has been detected by the physico-chemical and biological data; pH, specific gravity, content of moisture, C.O.D., B.O.D., electroconductance of the solution of the results, decrease of nition, and volume of total free nitrogen etc. The results are obtained as follows. 1) The characteristics of domestic nightsoil are different to the foreign data as table 5, but the data of anthracite ash almost are same except the composition of Fe₂O₃ and Al₂O₃. 2) Amount of total free nitrogen are increased by the digestion with the addition of solid waste, as effective absorption, to the nightsoil. 3) The digestion are accelerated by the compounding of ash, but the adding of sulfuric acid to fix the free ammonia reduced reaction. 4) The airation have to proceed slowly at initial step, and then endure enough volume of air at the later step.
동종 골수이식 후 만성 이식편대숙주반응 환자에서 발생한 폐렴구균에 의한 수막뇌염 1예
신완식,김병욱,유진홍,김동집,김춘추,박종원,이종욱,김동욱,강문원,김양리 대한감염학회 1993 감염 Vol.25 No.3
Graft-versus-host disease (GVHD) is a frequent complication after bone marrow transplantation. Infectious complications are common in GVHD patients due to defect in cell-mediated immunity. A rare case of S. pneumoniae meningoencephalitis occured in a patient with extensive form of chronic GVHD after allogeneic bone marrow transplantation. He was immediately treated with full dosage of ceftriaxone and ampicillin. He suffered from various complications such as sepsis, acute renal failure, atelectasis, and seizure. Despite of aggressive treatment, he died probably due to renal shutdown and massive subacute cerebral infarction of left cerebral hemisphere. This report showed two unusual and rare features. First, the infection site was CNS rather than respiratory system. Second, the causative organism was S. pneumoniae, which is rare cause of CNS infection in immunocompromised patients.
단상전원에 접속된 3상 유도전동기의 운전특성분석(II)
김도진,좌종근 제주대학교 공과대학 첨단기술연구소 2007 尖端技術硏究所論文集 Vol.18 No.-
This paper analyzes the performance characteristics of a three-phase induction motor operating according to the steinmetz connection in which the capacitor is connected across the leading phase winding. The two capacitive reactances of capacitor are determined at the starting and rated speed using the condition of minimum voltage unbalance factor of steinmetz connection. The applicability of these capacitors is investigated by comparing the computed results in the whole slip range with the balanced three-phase operation. It is found that the capacitive reactance at the starting is more suitable for single phase operation.