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배상욱,노철균,배영호,이득기 한국조명전기설비학회 2003 조명·전기설비학회논문지 Vol.17 No.2
천정크레인 설비의 자동화에 사용될 수 있는 반진동 제어알고리즘을 제안하였다. 제안하는 제어알고리즘은 1) 복잡한 비선형계통 제어에 유용한 것으로 알려진 보상 FLC를 갖는 FCL, 2) 화물의 진동을 적게 하도록 가속도, 속도, 위치 기준 궤적을 발생하는 기준패턴발생기, 3) 속도, 위치 오차를 궤환하는 가속도 궤환제어기로 구성된다. 특히, 제안한 알고리즘은 화물의 진동각 정보를 제어에 활용하지 않으므로 고가의 진동각 센서가 필요 없다는 특징을 갖는다. 시뮬레이션에 의한 연구와 모형 크레인에 대한 실험 연구에 의해 제안하는 알고리즘의 유용성을 보인다. In this paper, is proposed an anti-swing control algorithm for the automation of overhead crane. The algorithm consists of three parts, the FCL with compensatory FLC which generates acceleration, velocity and position reference to reduce swing angle and acceleration feedback controller which feedback control errors. Especially the algorithm dose not need angular sensor which detect swing angle of payload and requires high cost. By the simulation study and experiment with prototype crane, we showed the usefulness of the proposed algorithm.
과배란유도 전 기저 난소 낭종이 체외수정시술 결과에 미치는 영향
배상욱,이경진,이병석,박기현,조동제,송찬호,Bai, S.W.,Lee, K.J.,Lee, B.S.,Park, K.H.,Cho, D.J.,Song, C.H. 대한생식의학회 1999 Clinical and Experimental Reproductive Medicine Vol.26 No.2
This study was performed to determine the significance of a baseline ovarian cyst on the response to controlled ovarian hyperstimulation and the outcome of IVF-ET. One hundred one patients who underwent IVF-ET were enrolled in this study. The outcome of 31 patients, who had an ovarian cyst of >10mm detected at ultrasound examination performed on day 3, was compared with that of 70 patients who underwent a similar protocol and did not have an ovarian cyst. E2 level on the day of hCG administration, the number of follicles, the number of oocytes retrieved, the number of embryo transferred and the pregnancy rate were evaulated. The E2 level on the day of hCG adminstration and the number of mature oocytes retrieved were lower in the group with a baseline cyst. The pregnancy rate also was significantly lower in the group with a cyst (21% versus 38%). Therefore a baseline ovarian cyst on cycle day 3 was associated with a poorer outcome after IVF-ET.
배상욱,김의혁,신종승,김세광,박기현,이동한 연세대학교의과대학 2005 Yonsei medical journal Vol.46 No.1
This study was carried out in order to compare the effects in different surgeries using mesh in pelvic organ prolapse patients whose leading points were C. Thirty-nine patients were categorized into 3 groups: group A pelvic reconstruction with hysterectomy; group B hysterectomy prior to pelvic reconstruction; and group C pelvic reconstruction with uterus preserved. At first visit, POP-Q stage was determined, and age, BMI, admission days, operation time, post-operative stage and complications were observed and results were analyzed and compared. All patients who were operated upon converted to stage one month following the operation, and no further change was observed except in one patient. Group admission days were not significantly different, but tended to be lower in group C. Group average operation times between ‘group A and B’ and ‘group A and C’ were statistically different. No significant difference was observed in post-operative complications between the groups, but 3 members of group A developed erosion, whereas no erosion occurred in groups B and C. Pelvic reconstruction using mesh is a highly efficient method of treating pelvic organ prolapse. Improvements in stage and post-operative complications were not significantly different in the groups. However, uteropexy showed a shorter operation time, fewer admission days, and less erosion due to mesh than conventional pelvic reconstruction with hysterectomy.
배상욱,신종승,박주현,김세광,박기현,안중미 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.2
The purpose of this study was to compare the perioperative complication rates of reconstructive pelvic surgery and general gynecologic surgery, and to identify the predictive risk factors for perioperative complications in reconstructive pelvic surgery. The medical records of 148 reconstructive pelvic surgery patients and 146 general gynecologic surgery patients were reviewed, and the types of complications, along with their rates and predictive risk factors were examined. The statistical analysis included descriptive statistics and logistic regression. There was no difference in the type of complications between reconstructive pelvic surgery and general gynecologic surgery. The prevalences of perioperative complications were 34.4% in the reconstructive pelvic surgery group and 26.7% in the general gynecologic surgery group. Intraoperative blood loss (p= 0.006) and the duration of surgery (p=0.014) were independent risk factors for perioperative complications in the reconstructive pelvic surgery group. The perioperative complication rates for the patients undergoing reconstructive pelvic surgery were not higher than those of the patients undergoing general gynecologic surgery, even though more procedures were performed and a longer duration of surgery was needed in the former cases. Since the duration of surgery and the amount of blood loss are the major factors affecting the complication rate, decreasing these two factors would be the key to improving the outcomes of patients undergoing reconstructive pelvic surgery.