http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
慢性副鼻洞炎에 있어서 上顎洞內 貯溜液 및 洞粘膜의 細菌學的 硏究 : aerobic and anaerobic study in secretion and mucosa
孫昇基,車洪秀 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.3
The bacteriological characteristics of chronic maxillary sinusitis have been widely studied with varying results. Recently, the author performed a study on aerobic and anaerobic bacteria isolated from antial secretion and mucosa of 51 maxillary sinuses, employing an intraoperative technique for sample collection. The isolated bacteria were compared to nature of secretion, histopathology of mucosa and other findings such as radiology of sinus and duration of illness. The obtained results are as follows; 1. In secretion of sinuses, aerobes were isolated in 52.9% (14 species; 27 strains) and anaerobes in 25.9% (4 species; 13 strains). In mucosa, aerobes were isolated in 31.4% (8 species; 16 strains) and anaerobes in 13.7% (4 species; 7 strains). 2. The most frequently isolated bacteria were Staphylococcus aureus and K. pneumonia in aerobes, and Peptostreptococcus in anaerobes. 3. Among the 20 cases in which bacteria were isolated from both secretion and mucosa, Staphylococci were the most common in aerobes, Peptostreptococci were the most common in anaerobes. 4. In nature of each secretion, the rate of bacterial isolation was relatively higher in purulent, large amount and foul odour secretions. 5. There seems to be no relationship between bacterial findings and histopathological types of mucosa. 6. In radiologic findings of antrum, the rate of bacterial isolation was high in more cloud density in X-ray, but no specific relations were found in each isolated bacteria. 7. There was increasing tendency of bacterial isolation rate. when the duration of illness was longer. 8. In sensitivity to antibiotics, cephalothin was the most sensitive in Gram(+) bacteria, amikacin was the most sensitive in Gram(-) bacteria. In general, the sensitivity to antibiotics was high in Gram(-) bacteria compared to Gram(+) bacteria.
손지한,김원섭,한승기 한국물리학회 2016 새물리 Vol.66 No.6
We report our experimental results on the synchronization of two coupled Wien-bridge oscillators. The experiments were performed on electric circuits developed by using the MULTISIM electric circuit simulator, and the main results are summarized as follows: 1) The frequency response curve was obtained taking the resistor $R$ in the $RC$ circuits as the main control parameter; 2) when two Wien-bridge oscillators were connected by a resistor $R_{c}$, 1/$R_{c}$ acted as the coupling strength; 3) because of mutual synchronization, the frequency mismatch between the two oscillators decreased with increasing 1/$R_{c}$; 4) in addition to 1:1 frequency locking, higher-order 1:$n$ frequency locking was also observed; 5) a unidirectional coupling between the two oscillators was implemented by using a voltage follower circuit; 6) depending on the direction of coupling, frequency entrainment was observed between the master and the slave systems. In conclusion, the circuit experiments on the synchronization of two coupled Wien-bridge oscillators were performed easily by using the MULTISIM simulator, and the techniques can be applied for education and training on the dynamic analysis of nonlinear systems. 본 연구에서는 윈-브리지 발진회로의 결합에 의한 동기화 현상 실험 결과를 기술한다. 실험은 멀티심 전자회로 시뮬레이터를 이용해 수행했으며, 중요한 실험 결과는 다음과 같이 요약할 수 있다; 1) 발진기의 진동수 특성을 $RC$ 회로의 저항 $R$을 중요 조절 변수로 하여 구했다; 2) 두 개의 발진기를 결합저항 $R_c$로 연결했을 때, 저항의 역수 1/$R_{c}$가 결합의 세기 역할을 한다; 3) 상호 동기화 현상으로 두 발진기 사이의 진동수 불일치는 1/$R_{c}$에 따라서 감소한다; 4) 1:1 진동수 잠김뿐 만 아니라, 고차항의 1:$n$ 진동수 잠김 영역을 측정했다; 5) 전압 플로워 회로를 이용해 한 방향 결합을 구성했다; 6) 결합의 방향에 따라서 주인 회로와 하인회로 사이의 진동수 동반 현상을 관측했다. 결론적으로 윈-브리지 발진기의 동기화 실험은 멀티심을 활용하여 용이하게 수행할 수 있었으며, 이 기술은 다른 비선형 동력계의 교육과 훈련에도 활용될 수 있을 것이다.
조현수,박종선,손장원,윤준철,손창우,이상희,홍그루,신동구,김영조,정명호,채성철,허승호,홍택종,성인환,채제건,류제영,채인호,조명찬,배장호,나승운,김종진,최동훈,장양수,윤정한,정욱성,승기배,박승정 대한심장학회 2011 Korean Circulation Journal Vol.41 No.12
Background and Objectives: In patients with ST-segment elevation myocardial infarction (STEMI) and multivessel disease, complete revascularization (CR) for non-culprit lesions is not routinely recommended. The aim of this study was to compare the clinical outcomes of multivessel compared with infarct-related artery (IRA)-only revascularization in patients undergoing primary percutaneous coronary intervention (PCI) for STEMI. Subjects and Methods: From the Korean Acute Myocardial Infarction Registry (KAMIR) database, 1,094 STEMI patients with multivessel disease who underwent primary PCI with drug-eluting stents were enrolled in this study. The patients were divided into two groups: culprit-vessel-only revascularization (COR, n=827) group; multivessel revascularization, including non-IRA (MVR, n=267) group. The primary endpoint of this study included major adverse cardiac events (MACEs), such as death, myocardial infarction, or target or nontarget lesion revascularization at one year. Results: There was no difference in clinical characteristics between the two groups. During the one-year follow-up, 102 (15.2%) patients in the COR group and 32 (14.2%) in the MVR group experienced at least one MACE (p=0.330). There were no differences between the two groups in terms of rates of death, myocardial infarction, or revascularization (2.1% vs. 2.0%, 0.7% vs. 0.8%, and 11.7% vs. 10.1%, respectively; p=0.822, 0.910, and 0.301, respectively). The MACE rate was higher in the incompletely revascularized patients than in the completely revascularized patients (15% vs. 9.5%, p=0.039), and the difference was attributable to a higher rate of nontarget vessel revascularization (8.6% vs. 1.8%, p=0.002). Conclusion: Although multivessel angioplasty during primary PCI for STEMI did not reduce the MACE rate compared with culprit-vessel-only PCI, CR was associated with a lower rate of repeat revascularization after multivessel PCI.
배전시스템 전기설비 구성에 따른 확률론적 전력품질의 정량적 평가기법 개발
김용하,이성준,우성민,임현성,손승기,구민서,Kim, Yong-Ha,Lee, Sung-Jun,Woo, Sung-Min,Lim, Hyun-Sung,Son, Seung-Ki,Ku, Min-Seo 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.8
This paper presents a methodology on the AHP(Analytic Hierarchy Process) to calculate unified power quality index which provide an overall assessment of the distribution system performance. To obtain the unified power quality index. we propose the use of the AHP model and consider contingency using Monte Carlo simulation. The proposed method is especially useful and effective for planning. We have applied the proposed method to an actual relatively large system. 본 연구에서는 배전시스템 안정성의 요소라 할 수 있는 고조파, 전압변동, Sag/Swell, 신뢰도의 측면에서 배전시스템을 전력품질 측면에서 안정성을 종합적으로 평가하는 방법을 개발하였다. 시스템이 전력품질의 측면에서 얼마나 안정적인가를 정량적으로 평가하기 위해서 AHP(Analytic Hierarchy Process)를 사용하여 종합 전력품질 통합지수를 산정하는 방법을 제안하였다. 또한 몬테카를로 시뮬레이션을 수행함으로서 사고를 고려한 배전계통의 안정성을 평가하였다.