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문우남(Woo Nam Moon),윤재범(Jae Bum Yoon),양광문(Kwang Moon Yang),양재혁(Jae Hyug Yang) 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.2
Objective : This prospective study was done to find out common symptoms and beneficial physical examinations, and to evaluate relations among symptom, pain severity, physical examination method and width of symphysis pubis of symptom-giving pelvic girdle relaxation (PGR) in pregnant women. Methods : Four hundreds sixty-five pregnant women who complained pelvic pain were asked to fill out a questionnaire. Ninety-six pregnant women were diagnosed as PGR and were examined physically and took the sonogram. Statistical correlation was evaluated among symptoms, pain severity (visual analog scale: VAS), physical examination method and sonogram. Results : The most common complain was difficulty of rolling in bed (100%). The most frequent positive diagnostic physical method was posterior pelvic pain provocative test (PPPT) (85.4%). There was correlation between VAS and symptoms (r= 0.340, P=0.001) but no correlations between VAS or symptoms and numbers of positive physical examination (P>0.05). Conclusion : It is suggested that PPPT was most beneficial diagnostic methods of PGR in pregnancy.
문우남(Woo Nam Moon),김태진(Tae Jin Kim),윤재범(Jae Bum Yoon),오한진(Han Jin Oh) 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.3
Objective: This study was done to evaluate the risk factors and prevalence of symptom-giving pelvic girdle relaxation in pregnant women. Methods: Three hundreds thirty-two postpartum women were asked to fill out a questionnaire within one week after their parturition. The diagnostic criteria of this lesion were adopted from the Norwegian Medical Association's and Larsen's criteria. The questionnaire were included age, parity, BMI(kg/cm2), weight gain during the pregnancy, history of symptom giving pelvic girdle relaxation in previous pregnancy, level of exercise and vocational status during and before the pregnancy and baby's birth weight. The answers were evaluated to determine the risk factors. The correlation was tested by student t-test and logistic regression. Results: The prevalence of symptom-giving pelvic girdle relaxation during pregnancy was 18.9%. The history of symptom-giving pelvic girdle relaxation in previous pregnancy, multiparity and the absence of regular exercise before and during pregnancy showed correlation with symptom-giving pelvic girdle relaxation in pregnancy (p<0.05). Conclusion: It is suggested that women who experienced symptom-giving pelvic girdle relaxation in previous pregnancy should be checked for this lesion before pregnancy. Regular exercise is required to lower the incidence and lessen the severity of this lesion in pregnancy.
이희숙 ( Hee Suk Lee ),김주명 ( Joo Myung Kim ),유지희 ( Ji Hee Yoo ),육지형 ( Ji Hyung Yook ),김미라 ( Mi La Kim ),윤재범 ( Jae Bum Yoon ),주관영 ( Kwan Young Joo ),전종영 ( Jong Young Jun ),한호원 ( Ho Won Han ) 대한산부인과학회 2009 Obstetrics & Gynecology Science Vol.52 No.5
Objective: The purpose of this study was to evaluate the pregnancy outcomes of heterotopic pregnancy. Methods: Retrospective analysis was done in 24 patients who were diagnosed as heterotopic pregnancy between January 2000 and April 2008. Patients` characteristics, risk factors, treatment methods and pregnancy outcomes were evaluated. Results: A total of 24 patients were diagnosed as heterotopic pregnancy, all of these had undergone assisted reproductive technique. The mean age was 31.5 years and the mean gestational age at diagnosis was about 8 weeks. The most common etiology of infertility was tubal factor (54.2%). Four (16.7%) of the women had undergone ovulation induction, eighteen (75%) had undergone in vitro fertilization, but 2 patients (8.3%) had undergone assisted reproductive technique at other hospital and we didn`t know the exact method. The most common of ectopic site was tube (75%), and 50% of ectopic sites were ruptured status at diagnosis. Three (12.5%) of 24 patients were diagnosed ectopic pregnancy after dilatation and evacuation due to missed abortion, 4 (16.7%) were diagnosed ectopic pregnancy and missed abortion, and 17 (70.8%) were diagnosed ectopic pregnancy and living intrauterine pregnancy at the time of diagnosis. Laparotomy was done in 3 patients (12.5%) and laparoscopy was done in 21 patients (87.5%). Among 17 patients who had normal intrauterine pregnancy, 12 (70.6%) delivered singletones, 2 (11.8%) delivered twins, but 3 (17.6%) patients were lost follow up. Conclusion: Heterotopic pregnancy should be considered in pregnant woman with abdominal pain or vaginal bleeding, although confirmed normal intrauterine pregnancy using ultrasonography at early gestational age, especially if the woman have treatment history for infertility. And early diagnosis and proper management are important.
열등가회로를 이용한 5 kW 급 영구자석 동기전동기의 정상상태 열 특성 해석
김태현(Tae Hyun Kim),유영범(Young Bum Yoo),나종승(Jong Seung Na),유경태(Kyongtae Ryu),문윤재(Yoon Jae Moon),이재헌(Jae Heon Lee),이주(Ju Lee),박찬배(Chan Bae Park),문승재(Seung Jae Moon) 대한기계학회 2014 大韓機械學會論文集B Vol.38 No.11
본 논문에서는 영구자석 동기전동기의 특정 운행조건 중 발생하는 열 발생량에 대해, 열등가회로를 이용하여 정상상태 열 해석을 수행하였다. 최근 전동기는 소형, 경량화되며 극한 운행조건에서도 고출력 밀도를 견뎌야 한다. 특히, IPMSM 의 코일과 영구자석에서 발생하는 과도한 열은 전동기의 출력을 감소시키고, 전동기의 수명에 악영향을 끼치기 때문에 설계단계에서 IPMSM 의 열 해석이 중요하다. 그러므로, 본 연구에서는 열등가회로를 이용하여 IPMSM 의 설계변수 변화에 따라 정상상태 열 해석을 진행하였다. 변화된 설계변수는 하우징의 축방향 길이 그리고 하우징 두께이다. 마지막으로 열등가회로를 이용한 열 해석 결과와 유한요소법을 이용한 열 해석 결과를 비교하고, 열 해석 결과에 정확성과 신뢰성을 확인하고자 한다. Steady-state thermal analysis was performed on a thermal equivalent circuit to determine the heat generation during operation of an interior permanent magnet synchronous motor (IPMSM). New machines must be compact and light and produce high torque density under extreme environmental conditions. Thermal analysis of an IPMSM is particularly important because excessive heat generated from the core and magnet reduces the IPMSM"s output and has adverse effects on the durability. Therefore, steady-state thermal analysis of an IPMSM was performed for changes in the design variables using a thermal equivalent circuit. The changed variables were the axis length and thickness of the housing. The results of this method were compared with those of the finite element method to verify the accuracy and reliability.
海砂 混合率 變化에 따른 水中不分離性 콘크리트의 特性에 관한 硏究
김명식,윤재범,김광민,이상명 釜慶大學校 1999 釜慶大學校 論文集 Vol.4 No.1
The objective of this study is to investigate the characteristics change of antiwashout underwater concrete with variation of blen ratio of sea sand to total fine aggregates through experimental studies. The flowability(slump flow test), antiwashout properties(pH and suspension test), filling property(box test), air and chloride contents property, and the unit weight and the compressive strength of both cast-in-fresh water and cast-in-sea water have been examined experimentally. According to the experimental results, when sea sand are mixed in antiwashout underwater concrete mixture by about 40% per total fine aggregates, it is found that the flowability fit and the compressive strength is higher than others.