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Ovarian dysgerminoma with Mullerian anomaly: a case report
( Ha Na Kim ),( Jung Mi Byun ),( Jin Ok Park ),( Hye Kyoung Yoon ),( Da Hyun Kim ),( Dae Hoon Jeong ),( Young Nam Kim ),( Kyung Bok Lee ),( Moon Su Sung ) 대한산부인과학회 2020 Obstetrics & Gynecology Science Vol.63 No.1
Mullerian anomalies are rare deformities in women, and only a few cases concerning gynecologic malignancies arising in patients with congenital uterine malformations have been reported. Herein, we present the case of a 34-yearold woman with dysgerminoma with a Mullerian anomaly (uterus didelphys). She had secondary amenorrhea, and an ovarian mass and uterus didelphys were discovered during examination. After right salpingo-oophorectomy, the tumor was confirmed as dysgerminoma, and a chromosome study revealed a normal female karyotype (46, XX). The patient completely responded to 6 cycles of chemotherapy. To our knowledge, this is the first reported case of dysgerminoma with uterus didelphys. Although gynecologic malignancies in patients with Mullerian anomalies are very rare, clinicians should be aware of the coexistence of gynecologic malignancies and uterine malformations.
Ha, Ok-Nam,Kwon, Il-Wook,Hong, Suck-Ju,Kim, Jae-Yeol,Lee, Jong-In,Jeon, Sang-Sin,Ha, Kyung-Soo,Lee, Seung-Jae,Park, Chan-Soo,Jeong, Song-Tae 한국공작기계학회 2005 한국생산제조학회지 Vol.14 No.2
Since the use of CFC and HCFC refrigerants is to be restricted due to the depletion of ozone layer, this experiment applies the NH3 gas to study the performance characteristics from the superheat control for improving the energy efficiency. The experiments are carried out for the condensing pressure of refrigeration system from 1500kPa to 1600kPa by 50kPa and for degree of superheat from 0℃ to 10℃ by 1°C at each condensing pressure. As a result of experiment, 1) As degree of superheat increased, evaporating pressure of the compressor decreased so equilibrium temperature decreased. And specific volume of refrigerant vapors increased so refrigerant mass flow and heat load of the evaporator decreased. 2) An influence of change of condensing pressure on heat load of the evaporator was insignificant. 3) With the identical degree of superheat, change of compressed temperature was insignificant according to each condensing pressure, so there was little change in enthalpy. 4) when the degree of superheat is 0℃ at each condensing pressure, the refrigeration system has the highest performance.
Comparion of stability in titanium implants with different surface topographies in dogs
Nam-Sook Kim,Mong-Sook Vang,Hong-So Yang,Sang-Won Park,Ha-Ok Park,Hyun-Pil Lim 대한치과보철학회 2009 The Journal of Advanced Prosthodontics Vol.1 No.1
STATEMENT OF PROBLEM. A few of studies which compared and continuously measured the stability of various surface treated implants in the same individual had been performed. PURPOSE. We aim to find the clinical significance of surface treatments by observing the differences in the stabilization stages of implant stability. MATERIAL AND METHODS. Eight different surface topographies of dental implants were especially designed for the present study. Machined surface implants were used as a control group. 4 nano-treated surface implants (20 nm TiO2 coating surface, heat-treated 80 nm TiO2 coating surface, CaP coating surface, heat treated CaP coating surface) and 3 micro-treated surface implants [resorbable blast media (RBM) surface, sandblast and acid-etched (SAE) surface, anodized RBM surface] were used as experiment groups. All 24 implants were placed in 3 adult dogs. Periotest® & ISQ values measured for 8 weeks and all animals were sacrificed at 8 weeks after surgery. Then the histological analyses were done. RESULTS. In PTV, all implants were stabilized except 1 failed implants. In ISQ values, The lowest stability was observed at different times for each individual. The ISQ values were showed increased tendency after 5 weeks in every groups. After 4 to 5 weeks, the values were stabilized. There was no statistical correlation between the ISQ values and PTV. In the histological findings, the bone formation was observed to be adequate in general and no differences among the 8 surface treated implants. CONCLUSIONS. In this study, the difference in the stability of the implants was determined not by the differences in the surface treatment but by the individual specificity.
Study on performance test of orchard tractor power transmission systems
Nam-Seok Sung,Dong-Il Chang,Yun-Kun Huh,Sun-Ok Chung,Jong-Seung Cho,Jong-Kyou Ha 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.3
This study started to export an orchard tractor to Europe under the situations that R&D activities for orchard tractor were marginal and even it was not produced. The R&D for orchard tractor has been progressed and the most of it is accomplishing the goal. In this study, the durability of clutch friction part was tested for F/R clutch and moment of inertia of PTO clutch, and it was compared with the design criteria of transmission of tractor. According to the results of inertia test of F/R clutch, hydraulic pressures of clutch satisfied 1,961.33 ± 196.13 ㎪ of design criteria, and the variations of torque for forward and reverse operation were relatively constant. Therefore, it was found that the durability of clutch friction part was stable and reliable. Test results showed that the main hydraulic pressures were maintained 1,961.33 ± 196.13 ㎪ during the tests of moment of inertia of PTO clutch, and when it was operated, the hydraulic pressures were reached 1,961.33±196.13 ㎪. Therefore, it was found that the hydraulic pressures of PTO satisfied the design criteria. By the results that the time of the hydraulic pressures of PTO reaching main hydraulic pressure, and that of torque values restoring to the original was same as the time of the first gear of PTO reaching the maximum rotational speed, it was found that PTO could transfer power to attachments as it was designed.
The Survey on Korean Menopausal Women`s Behavior and Perception of Hormone Therapy
( Nam Kung Jeong ),( Youn Jee Chung ),( Jae Eun Ha ),( Hyun Hee Jo ),( Eun Jung Kim ),( Dong Jin Kwon ),( Young Ok Lew ),( Jang Heub Kim ),( Mee Ran Kim ) 대한폐경학회 2011 대한폐경학회지 Vol.17 No.3
연구목적: 폐경 여성에서 호르몬 요법은 그 이점이 많음에도 불구하고 WHI 연구 결과 발표 이후로 호르몬 요법에 대한 인식의 전환으로 호르몬 사용이 감소되었다. 이에 본 연구는 폐경 증상으로 병원을 방문한 여성 중 폐경 여성의 호르몬 요법에 대한 반응과 인지도 및 태도에 대해 조사하였다. 연구재료 및 방법: 본 연구는 2009년 9월부터 2009년 10월까지 4주간에 걸쳐 폐경 증상으로 병원을 방문한 45~64세 여성으로 대상으로 하여 설문을 통해 조사하였다. 설문은 일대일 직접 면담을 통해 30분 이내로 이뤄졌으며 대상군을 45~49세, 50~54세, 55~59세, 60~64세로 구분하여 각각 150명씩 총 600명의 여성을 대상으로 하였다. 결과: 폐경 증상으로 찾은 병원의 형태는 산부인과가 80%를 차지하였다. 그 중 현재까지 호르몬을 복용하고 있는 여성은 16%, 그 외 84%는 호르몬 치료 경험이 전혀 없거나 (53%) 사용하다가 중단한 경우였다 (31%). 호르몬 사용자중에서 단지 9%만이 5년 이상 호르몬 요법을 받았고 80%에서는 호르몬 사용기간이 2년 이내로 나타났다. 호르몬 요법경험 여부와 관계없이 가장 불편한 증상은 안면 홍조였으며, 의사가 권유했을 때 72%의 환자에서 호르몬 요법을 받아들였다. 호르몬 비사용자의 경우 호르몬 요법을 받지 않은 가장 큰 이유가 부작용 때문이었으며 (51%), 그 중에서도 암에 대한 우려가 67%로 나타났다. 결론: 폐경 증상 호전에 있어 호르몬 요법이 효과적임에도 불구하고 많은 여성에서 호르몬 요법을 받아들이지 않고, 호르몬 요법을 시작했더라도 반수 이상에서 호르몬 요법을 중단한다. 가장 흔한 이유는 부작용에 대한 걱정, 그중에서도 암 발생과 관련된 우려 때문인 것으로 나타났다. 따라서 폐경기 호르몬 요법은 폐경 증상 호전과 삶의 질향상을 위해 가능한 단기간 최소 용량으로 사용하는 것이 좋겠다. Objectives: After Women`s Health Initiative (WHI) study had been published, the use of hormone therapy (HT) have been decreasing even though it is the most effective therapy for menopausal symptom. The survey was conducted to investigate Korean menopausal women`s perception of HT and behavior when they are treated by HT. Methods: During 4 weeks from September 2009 to October 2009, total 600 women aged 45~64 participated in the survey by face to face interview. Out of answering women, women who have visited clinic/hospital at least 1 time to treat their menopausal symptom during last 1 year were included. One hundred fifty women for each age group, 45~49, 50~54, 55~59 and 60~64, were recruited in consecutive order. Results: Eighty percent women who have visited clinic/hospital to treat menopausal symptom, visited obstetrics and gynecology. Only 16% of these women were current user, and other 84% of these women had no experience of HT (53%) or stopped therapy (31%). Among current user, only 9% of women have used HT more than 5 years. Eighty percent of current user had used HT less than 2 years. Most distressing menopausal symptom is ``hot flush`` regardless HT experience. When doctor recommend HT, 72% of patients accept HT in overall. Among women who had no experience of HT, the most common reason of not to take HT was concern of side effects (51%). And 67% of women who had concern of side effects worried about cancer incidence. Conclusion: Many women with menopausal symptom do not take HT even though it is the most effective therapy. Most of women who take HT stop treatment within 1 year. Most common reason of not to take HT is concern about side effect, increasing incidence of cancer related to HT. Therefore, HT should be considered to short-term relief of menopausal symptoms and at the minimal dose, if possible. (J Korean Soc Menopause 2011;17:142-149)
Ha, Ok-Nam,Hong, Suck-Ju,Youn, Kab-Sik,Lee, Jong-In,Kwon, Il-Wook,Lee, Seung-Jae,Jeon, Sang-Sin,Ha, Kyung-Soo,Jung, Song-Tae 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.2
Since the use of CFC and HCFC refrigerants are to be restricted due to the depletion of ozone layer, this experiment applies the NH₃ gas to study the performance characteristics from the superheat control for improving the energy efficiency. The experiments are carried out for the condensing pressure of refrigeration system from 14.5 bar to 16.0 bar by 0.5 bar and for superheat temperature from O℃ to 10℃ by 1℃ at each condensing pressure. As a result of experiment, when the superheat temperature is 1℃ at each condensing pressure, the refrigeration system has the highest performance.