http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Large tubular colonic duplication in an adult treated with a small midline incision
Yuen Geng Yong,Kyung Uk Jung,Yong Beom Cho,Seong Hyeon Yun,Hee Cheol Kim,Woo Yong Lee,Ho-Kyung Chun 대한외과학회 2012 Annals of Surgical Treatment and Research(ASRT) Vol.82 No.3
Tubular colonic duplication presenting in adults is rare and difficult to diagnose preoperatively. Only a few cases have been reported in the literature. We report a case of a 29-year-old lady presenting with a long history of chronic constipation, abdominal mass and repeated episodes of abdominal pain. The abdominal-pelvic computed tomography scan showed segmental bowel wall thickening thought to be small bowel, and dilatation with stasis of intraluminal content. The provisional diagnosis was small bowel duplication. She was scheduled for single port laparoscopic resection. However, a T-shaped tubular colonic duplication at sigmoid colon was found intraoperatively. Resection of the large T-shaped tubular colonic duplication containing multiple impacted large fecaloma and primary anastomosis was performed. There was no perioperative complication. We report, herein, the case of a T-shaped tubular colonic duplication at sigmoid colon in an adult who was successfully treated through mini-laparotomy assisted by single port laparoscopic surgery.
관성 추정기를 이용한 드럼 세탁기의 최적 세탁시간 조절 알고리즘
황춘환(Chun-Hwan Hwang),이정효(Jung-Hyo Lee),김경민(Kyung-Min Kim),공태웅(Tae-Woong Kong),이원철(Woncheol Lee),원충연(Chung-Yuen Won),김영렬(Young Real Kim) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
Conventional drum washing machine is divided by amount of laundry on 3 step. Because that, this method is arisen in case of washing smaller amount of laundry than each weight during same time. In other words, power is wasted by unnecessary washing time. In this paper, exact quantity of laundry is obtained by using inertia estimator considering features of drum washing machine, unnecessary washing time is decreased by selection proper washing time, thus the algorithm that increase efficiency by reducing power consumption is proposed.
황춘환(Chun-Hwan Hwang),박상훈(Sang-Hoon Park),장수진(Su-Jin Jang),원충연(Chung-Yuen Won),정용채(Yong-Chae Jung) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
일반적인 AC/DC변환 장치는 안정화된 직류 전원을 얻기 위해 대용량의 커패시터와 고속의 전력용 반도체 스위칭 소자를 사용한다. 하지만, 이러한 소자의 사용으로 인해 입력측의 고조파 손실 및 역률 저하의 문제점을 갖게 되고 고속 스위칭에 따른 스위칭 손실에 의한 효율이 저하되는 문제점을 갖게 된다. 따라서 본 논문에서는 역률개선이 가능하고 스위칭 손실이 저감되는 ZVS 방식을 이용한 새로운 형태의 역률개선용 소프트 스위칭 방식의 부스트 컨버터를 제안한다.
A time-dependent logit-based taxi customer-search model
Wai Yuen Szeto,Ryan Cheuk Pong Wong,Sze Chun Wong,HaiYang 서울시립대학교 도시과학연구원 2013 도시과학국제저널 Vol.17 No.2
In this study, global positioning system data from 460 urban taxis are used to develop a time-dependent logit model. The rate of return (ROR, also known as profit per unit time) is used as a factor underlying taxi drivers’ searching behaviour for customers. The data also reveal that the search behaviour across districts as well as the decisions towards a particular district in customer-search is strongly related to the daily profile of passenger demand, and that when the overall passenger demand is high, vacant taxi drivers tend to circulate within or wait at the area where their preceding customers got off to find their next customer. The results also show that the ROR is a significant factor that affects the customer-searching strategies of vacant taxi drivers over a day, and is inversely related to the percentage of taxi idling time. More importantly, this paper illustrates that there is a change in searching behaviour over time of day.
Learning curves for single incision and conventional laparoscopic right hemicolectomy
Yoonah Park,Yuen Geng Yong,Seong Hyeon Yun,Kyung Uk Jung,Jung Wook Huh,Yong Beom Cho,Hee Cheol Kim,Woo Yong Lee,Ho-Kyung Chun 대한외과학회 2015 Annals of Surgical Treatment and Research(ASRT) Vol.88 No.5
Purpose: This study aimed to compare the learning curves and early postoperative outcomes for conventional laparoscopic (CL) and single incision laparoscopic (SIL) right hemicolectomy (RHC). Methods: This retrospective study included the initial 35 cases in each group. Learning curves were evaluated by the moving average of operative time, mean operative time of every five consecutive cases, and cumulative sum (CUSUM) analysis. The learning phase was considered overcome when the moving average of operative times reached a plateau, and when the mean operative time of every five consecutive cases reached a low point and subsequently did not vary by more than 30 minutes. Results: Six patients with missing data in the CL RHC group were excluded from the analyses. According to the mean operative time of every five consecutive cases, learning phase of SIL and CL RHC was completed between 26 and 30 cases, and 16 and 20 cases, respectively. Moving average analysis revealed that approximately 31 (SIL) and 25 (CL) cases were needed to complete the learning phase, respectively. CUSUM analysis demonstrated that 10 (SIL) and two (CL) cases were required to reach a steady state of complication-free performance, respectively. Postoperative complications rate was higher in SIL than in CL group, but the difference was not statistically significant (17.1% vs. 3.4%). Conclusion: The learning phase of SIL RHC is longer than that of CL RHC. Early oncological outcomes of both techniques were comparable. However, SIL RHC had a statistically insignificant higher complication rate than CL RHC during the learning phase.