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박범석,명남숙,이형주,박홍석,한철우,구수권,Park, Beom-Seok,Myung, Nam-Sook,Lee, Hyoung-Ju,Park, Hong-Seok,Han, Cheol-Woo,Koo, Soo-Kweon 대한기관식도과학회 2009 大韓氣管食道科學會誌 Vol.15 No.2
Background and Objectives : Peritonsillar abscess is one of the most common illnesses m the ENT field, though its prevalence has been drastically reduced with the development of antibiotics and appropriate early treatment. We analyzed recent clinical characteristics of peritonsillar abscess and compared them with ones of 7 and 14 years ago respectively. Materials and Methods : Sixty-six cases of peritonsillar abscess from 2006 through 2008 were investigated retrospectively and compared with results of 7 and 14 years ago on various clinical factors. Results : Peritonsillar abscess was prevalent in men in their 20s and 30s. Mean period from symptom onset to visit to hospital tended to decrease(5.2 days) but admission days has increased(7.4 days). Body temperature on admission was lower than that of previous studies($36.4^{\circ}C$). Bacteria were isolated in 26 cases(74.2%) out of 35 cases in which culture had been performed. The most common cultured organism was a-hemolytic streptococcus and $\beta$-hemolytic streptococcus that had been most frequently cultured 14 years ago wasn't detected in this study. Conclusion : We found some changes of clinical features in peritonsillar abscess when compared with previous researches. Although there were some differences in cultured organism, antibiotics used commonly-cephalosporin, aminoglycoside, quinolone - were still effective for their eradication.
박범석(Beom Seok Park),유성구(Sung Goo Yoo),정길도(Kil To Chong) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.3
In the bilateral tele-operation system, time delay may be a critical problem. Even if system modeling error or time delay occurs, when applied to wave transformation system, the system"s stability can be achieved. Using the characterisitc b which is an important parameter of wave transformation, the system can display robust performance for time delay. However, since assuming and that the time delay was fixed developing a theory, a stability cannot be guaranteed about the time varying delay. Therefore, In the paper, Therefore in this paper, we studied for the method that controls this by applying the fuzzy algorithm which surveyed the time-varying delay characterisitcs and can adjust the b according to it adaptively.