http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전성택(Sung-Teck Jeon),김내현(Nae-Hyun Kim),조진표(Jin-Pyo Cho),음현진(Hyun-Jin Eum),김도균(Do-Kyun Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
Fan through the rotor mechanical energy applied to the gas pressure and the rate of energy change what survives of the industrial system, the fluid machine is a major component. Axial flow fan used in this study, the blade and hub are separate blades can adjust the pitch angle is constructed. Variation of pitch axial flow fan performance was confirmed by experiments investigated the effect of the length of the blade. Pitch angle of 5° to 20°~45° at intervals of 6 degrees were measured by varying the fan blade airfoil in the form of the same length 90㎜, 100㎜, 110㎜, 120㎜ axial flow fans by changing the performance; The following conclusions were drawn. The pitch angle of 35° above the blade length of all the values in the airflow and static pressure grows, so look sharp decline. According to the same pitch angle, air flow from the static pressure has a similar slope. If you have the same pitch angle, power consumption, depending on the value of airflow and gentle slopes that have a longer blade length, which shows higher power consumption. fan efficiency is maximum value was observed in 30° pitch angle 20°~30° pitch angle shows a similar result
평행류형 열교환기를 이용한 분리형 히트파이프의 성능에 관한 연구
전성택(Sung-Taek Jeon),조진표(Jin-Pyo Cho),음현진(Hyun-Jin Eum) 한국산학기술학회 2014 한국산학기술학회 학술대회 Vol.- No.-
자동차용 에어컨의 열교환기로 사용되고 있는 평행류형 열교환기의 배기열 회수 환기장치로 적용 가능성을 알아보기 위해 냉매 충진량에 따른 열교환 효율 특성을 시험적으로 평가 하였다. 본 연구에서 사용된 히트 파이프는 환기장치에 적용이 가능하도록 분리형으로 제작되었다. 작동유체는 R22 냉매이고 유체의 충진량은 40~60(%vol)로 10(%vol) 단위로 충진 하였다. 환기량은 전면풍속을 기준으로 0. 3~1.5m/s로 0.3 m/s 간격으로 바꿔 가며 측정하였다. 시험결과 최대 효율을 가지는 냉매 충진량이 환기량에 따라 다름을 알 수 있었고, 실험 결과 분석을 통하여 분리형 히트파이프의 환기량에 따른 최적 냉매 충진량을 찾을 수 있었다.
피치각과 날개 길이 변화에 따른 축류팬의 성능 및 소음 특성에 관한 실험적 연구
전성택(Sung-Teck Jeon),김내현(Nae-Hyun Kim),조진표(Jin-Pyo Cho),음현진(Hyun-Jin Eum),김도균(Do-Kyun Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10
In this study, the blade and hub are separate blades can adjust the pitch angle is constructed. Variation of pitch axial flow fan performance was confirmed by experiments investigated the effect of the length of the blade. Pitch angle of 5° to 20°~45° at intervals of 6 set were measured by varying the fan blade airfoil in the form of the same length five steps(80mm, 90mm, 100mm, 110mm, 120mm) axial flow fans by changing the performance. According to the same pitch angle, air flow from the static pressure has a similar slope. Same pitch angle, power consumption, depending on the value of airflow and gentle slopes that have a longer blade length, pitch angle change was difficult to find a relationship in which each pitch, each of surging point is judged to be due to the impact of the change. Due to changes in the length of the fan blade pitch angle, which shows the noise characteristics by pitch angle increases, the noise also increases the value and the same pitch angle.
Sil-Select와 Percoll이 정충의 미세구조에 미치는 영향
김성훈(Sung Hoon Kim),김정훈(Chung Hoon Kim),박은주(Eun Ju Park),홍석호(Seok Ho Hong),나희영(Hee Young Nah),김정희(Jung Hee Kim),음현진(Hyun Jin Em),김숙희(Sook Hee Kim),채희동(Hee Dong Chae),강병문(Byung Moon Kang),허주령(Joo Ryung 대한산부인과학회 2000 Obstetrics & Gynecology Science Vol.43 No.7
목적 : 일반적으로 정자의 회수시 사용되는 Percoll과 silane-표면처리된 아교 규소 입자로 이루어진 Sil-Select의 효과를 평가해 보고자 본 연구를 시행하였다. 연구방법 : 세계보건기구(WHO)의 기준에 의거하여 정상적인 정액 소견을 보이는 환자 22명의 정액을 채취하고 채취한 정액을 이등분하여 각각 Percoll과 Sil-Select를 이용하여 정자를 회수하였다. 정자의 처리가 끝난 후 양 군의 정자의 농도, 활동성, 정밀기준(strict criteria)에 의거한 형태학적 특성을 평가하였고 모든 정액 표본은 주사전자현미경하에서의 형태학적 비교를 위하여 고정된 후 염색되었다. 결과 : 광학현미경 관찰 상 Sil-Select 군과 Percoll 군 사이에 정자 농도, 활동성 정충의 비율, 정밀기준에 의거한 정상 형태의 정충 비율은 유의한 차이가 없었다. 그러나 주사현미경 관찰 상 첨체의 형태와 위치가 정상인 정충의 비율, 미토콘드리아의 정상 나선형 구조를 가진 정충의 비율은 Percoll 군에 비해 Sil-Select 군에서 유의하게 높았다(p<0.001, p<0.001, p<0.001). 결론 : 본 연구 결과 정자 처리 과정에서 Sil-Select는 Percoll에 비해 정충의 첨체와 미토콘드리아에 해가 적은 것으로 여겨진다. Objective : We performed this study to evaluate the effects of Sil-Select and Percoll in sperm preparation. Methods : Semen samples of 22 patients with normal sperm parameters by WHO criteria were divided into two equal parts and prepared with Percoll and Sil-Select. After completion of semen preparation procedures with Percoll and Sil-Select, sperm concentration, motility and morphology using strict criteria were evaluated in each group and all semen samples were fixed and stained for transmission electron microscopy(TEM). Results : There were no significant diffrences in sperm concentration, percentage of motile spermatozoa and percentage of normal spermatozoa in morphology evaluation using strict criteria under light microscopy between Percoll and Sil-Select-treated groups. However, the percentage of normal shape and position of acrosome, and normal helix assembly of mitochondria under TEM were significantly higher in the Sil-Select-treated group compared to Percoll-treated group (p < 0.001, p < 0.001, p < 0.001). Conclusion : These data demonstrate that Sil-Select is less detrimental to the acrosome and mitochondria of spermatozoa in sperm preparation compared to Percoll.
폐경기 여성에서 혈중 에스트라디올 농도 및 골밀도와 청력 기능과의 연관성
박은주 ( Eun Ju Park ),이동선 ( Dong Sun Lee ),김성훈 ( Sung Hoon Kim ),채희동 ( Hee Dong Chae ),김정훈 ( Chung Hoon Kim ),강병문 ( Byung Moon Kang ),전대준 ( Dae Joon Cheon ),박견 ( Kyun Park ),유항조 ( Hang Jo You ),음현진 ( Hy 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.7
N/A Objective: To clarify whether hearing sensitivity in postmenopausal women is associated with serum estradiol level or bone mineral density (BMD) Materials and Methods: From January 1999 to December 1999, serum concentration of estradiol, bone mineral densities of the lumbar vertebrae and femoral neck, and hearing sensitivity were measured in 1162 postmenopausal women. Serum concentration of estradiol was measured by radioimmunoassay. Dual energy X-ray absorptiometry (DEXA) was used to measure bone mineral densities of the lumbar vertebrae and femoral neck. Pure tone thresholds were evaluated by screening pure tone audiometry. All data were analyzed with Student`s t-test, multiple logistic regression analysis, and multiple linear regression analysis. Results: A total of 1155 patients were analyzed; 155 patients were in the hearing-loss group and 1000 patients were in the control group. On univariate analysis, significant differences were found in mean age, concentration of serum estradiol, and BMD of the fernoral neck between the two groups (mean±SD, 58.1±5.2 vs 56.0±4.3, 11.6±6.0 vs 13.1±12.0, 0.67±0.11 vs 0.70±0.11; p-value: 0.0001, 0.01, 0.02). On multiple logistic regression analysis and multiple linear regression analysis, significant association was found between age and hearing loss and between age and pure tone threshold (p-value: 0.0001, 0.0001, respectively). However, neither seum concentration of estradiol nor BMD was associated with hearing loss or pure tone threshold. Conclusion: This study suggests that hearing sensitivity in postmenopausal women is not directly associated with serum estradiol level or BMD.
박은주 ( Eun Ju Park ),김성훈 ( Sung Hoon Kim ),장윤석 ( Yoon Seok Chang ),채희동 ( Hee Dong Chae ),김정훈 ( Chung Hoon Kim ),강병문 ( Byung Moon Kang ),전대준 ( Dae Joon Cheon ),박견 ( Kyun Park ),차지만 ( Ji Man Cha ),음현진 ( 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.7
N/A Objectives: To evaluate the causes of intrauterine adhesion (IUA) and the efficacy of hysteroscopic adhesiolysis in patients with IUA Methods: From January 1995 to June 1999, a total of 63 patients with IUA were underwent hysteroscopic adhesiolysis. The patients with IUA only were trying to be pegnant spontaneous whereas, intrauterine insemination (IUI) or in vitro fertilization and embryo transfer (IVF-ET) were performed in the patients who have other infertility factors and IUA as well. The data such as the changes of menstrual amount and pattern, fertility, and full-term live birth rate were analyzed. Results: The most common cause of IUA was curettage related problems; after incomplete abortion 20.6%, postpartum bleeding 9.5%, elective abortion 47.6%, missed abortion 11.1%, and for treatment of hydatidiform mole 1.6%. All patients with amenorrhea or oligomenorrhea had improvement of their menstrual patterns. Forty seven patients wanted pregnancy and 31 patients achieved pregnancy (68.4%). Full-term live birth rate 38.3% and there was one placenta accreta in full-term live birth case, which was resolved by postpartum curettage. Conclusion: Hysteroscopic adhesiolysis of IUA could be effective for restoring the normal menstrual pattern and fertility.