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노형운(HW Roh),이갑수(GS Lee),박영무(YM Park),김범석(BS Kim),이영호(YH Lee) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
In general, the hollow jet valve, the fixed cone valve had been used for the urgency released or maintenance of the flow rate. Nowadays, the butterfly valve, the gate valve are applied in economic performance and operation maintenance more than the hollow jet valve, the fixed cone valve. However, in the case of butterfly valve, it should be required the strict application standard to the cavitation coefficient because the structural axis and disk were situated in pipe channel and the occurring the shock problem by Karman Vortex. And, the judgment data for choice were slight lowdown in water supply and drainage facilities standard or Japanese penstock technology standard, various standard of KOWACO etc. Therefore, there were investigated the valve inside phenomenon (cavitation, disk chattering, vibration) by velocity of flow and the stability examination of body by high velocity of flow through flow scale model test using the numerical analysis and PIV to establish the applicable extensibility of the butterfly valve for the urgency released valve.
이현원(HW.LEE),장성영(SY.JANG),김연준(YJ.KIM),이광주(KJ.LEE),김남해(N.H.KIM) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
The AC-to-DC single-phase PWM rectifier for traction applications using high POWE semiconductor, IGCT is made and tested. Parallel operation of two PWM converter is adopted of increasing capacity of converters For reducing harmonics, the harmonic content is eliminated by th phase shift between two converters switching phase The output voltage control is achieved by intern. calculation without detecting the input current. The part of PLL used for controlling power factor i, simply implemented by software.
최희원(HW Choi),송승규(SK Song),이헌영(HY Lee) 대한산부인과학회 1975 Obstetrics & Gynecology Science Vol.18 No.3
이상을 요약하면 부인과의사는 cervix, vagina, vulva 등에 종양을 가진 환자를 치료하기 전에 multicentric neoplastic change in large epithelial field를 염두에 두어 다른 부위에 종양이 잇는지 여부를 철저히 검사할 것이며 또한 한 부위에 종양을 치료한 후에 주기적으로 다른 부위를 추적 검사하여야 한다. Primary vulva carcinoma is rare disease, and multiple primary malignancy in lower genital tract of the same individual is very rare. A case of vulva ca. arising from labium minor combined with cervix carcinoma in 46 years old multiparous woman was presented. The patients was treated with radical vulvectomy and hysterctomy and she had been followed for 3 years without any complications and evidence of recurrence. And a brief review of the theory of multicentric ongin in lower gentital tract on the literature is made.
강희운(HW Kang),유한선(HS Yoo),전정일(CI Chun) 대한산부인과학회 1977 Obstetrics & Gynecology Science Vol.20 No.12
저자들은 신체 여러 부위에 기형을 동반한 선천성 사지결손증 2예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. Congenital skeletal limb deficiencies are rare cases in congenital anomalies of newborn infants. Authors experienced two cases of peromelia, who had multiple anomalies such as absence of external genitalia, anal atresia, hemivertebrae, anencephaly and cephalocele. In case 1, autopsy findimgs revealed the complete duodenal obstruction between second and third portion, and anal atresia. X-ray findings showed multiple bone anomalies such as hemivertebrae, dislocation of femoral head due to incomplete formation of the pelvis. In this case, we could not recognize sex of the baby grossly so we confirmed that is male by chromosomal study and pathologic findings. In the second case, we could observed that the baby was anencephalic monster with cephslocele, but other organs were normal in autopsy findings except multiple skeletal limb deficiencies.
노형운(HW Roh),오상현(OS Oh),이영호(YH Lee) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
In general, the function of intake structure, whether it be a open channel, a fully wetted tunnel, a sump or a tank, is to supply an evenly distributed flow to a pump station. An even distribution of flow, characterized by strong local flow, can result in formation of surface or submerged vortices, and with certain low values of submergence, may introduce air into pump, causing a reduction of capacity and efficiency, an increase in vibration and additional noise. Unfortunately in order to design the sump station, the reasonable code or the standards weren't presented yet in Korea. Thus, some researchers had often referred the HI code, JSME code or CEN code to design the sump station. This study aims to prescribe the standard of sump design which were matched well the Korean pump station. Thus, the HI code and TSJ code would be interpreted fully to Korean language, the part of interpreted clauses of the western codes would be selected to compose the standard.
김화은(HW Kim),문제호(JH Moon),장병기(BK Chang),박영상(YS Park),강영호(YH Kang) 대한산부인과학회 1981 Obstetrics & Gynecology Science Vol.24 No.4
저자들은 1977년 5월부터 1978년 12월사이에 복강경 불임수술 후에 속발된 자궁외 임신 4예 를 경험하였기에 간략한 문헌고찰과 아울러 증례를 보고하였다. Four cases of Ectopic pregnancy following Laparoscopic Tubal Sterilization are presented with the review of literature available.
임신 제 3 기에 시행한 자가수혈의 안전성에 관한 연구
정환욱,김은성,한호원,김문영,류현미,윤재범,김재영,조동희 대한산부인과학회 1994 Obstetrics & Gynecology Science Vol.37 No.5
1991년 10월부터 1993년 7월까지 22개월동안 제일병원 산부인과를 방문한 임신말기의 산모 56명을 대상으로 91회의 자가혈액을 공혈, 예치하여 다음과 같은 결론을 얻었다. 1. 공혈부작용은 3%로 일반헌혈에서 볼 수 있는 공혈부작용과 비슷한 빈도였다. 2. 처음 공혈하기전 산모의 적혈구용적율과 분만을 위하여 입원 하였을 당시의 적혈구 용적율 사이에 통계학적으로 유의한 차이가 없었다(p$gt;0.05). 3. 공혈동안 측정한 산모의 혈압과 맥박수의 의미있는 변화를 관찰할 수 없었다. 4. 공혈전, 후 시행한 비수축성 검사와 공혈동안 시행한 지속적 태아심음감시상 1예를 제외하고 정상 반응을 보였다. 5. 신생아의 Apgar score는 출생 1분, 5분에 각각 6점 및 7점이상이고 체중은 2,530 gm에서 4,190 gm으로 평균 3,253 gm이었다. 6. 공혈에 참가한 산모가 분만후 자기혈액을 수혈을 받은 경우가 56명중 13명(23%)이였고 이중 전치 태반환자 12명중 10명이 수혈을 받았다. 이상의 연구결과로 임신 제 3기에 지속적 태아심음 감시하에서 시행한 자가수혈은 산모 및 태아에 안전하며 자가수혈의 유용성에 대해서는 전치태반의 경우나 희귀한 혈액형이 드문 지역에서는 도움이 되며 동종 혈액 수혈로의 전용을 고려한다면 임신중 자가수혈이 유용하다고 생각한다. Autologous blood donation (ABD) is now widely appreciated as a means of eliminating the trasmission of blood borne infection such as AIDS and hepatitis. However its safety for both mother and fetus, especially in the third trimester, has not been established. The aim of this study is to determine the safety and utility of autologous blood donation in the third trimester of pregnancy. Over a period 22 months, pregnant women (N=56) in their third trimester, who had a rare blood group or a predictable risk of hemorrhage, underwent 91 phlebotomies. Phlebotomies were performed at an aversage gestational age of 36.9 weeks up to three times and donated an average of 1.6 unit of blood. Changes of fetal heart rate were redorded by electronic fetal monitoring before, during and after phlebotomy. There was no significant change in fetal heart rate except in one case with temporary decrease. Changes in mean maternal diastolic blood pressure and pulse rate were not significantly different. All fetal outcomes were good. The average interval from last donation to delivery was 11.7 day. Change in mean maternal hematocrit between the initial donation and admission day for delivery was not statistically significant (p$gt;0.05). Only mild donor reactions occurred in three out of 91 (3%) phlebotomies. Thirteen patients received a total of 38 units of red blood cells (24 autologous, 14 homologous). Ten out of twelve patients with placenta previa used their autologous blood. We conclud that ABD in pregnant woman in third trimester is safe for mother and fetus. But further investigation is needed to determine its usefulness.