Audio/Visual Session : Triple operation for uterine prolapse & SUI using polypropylene mesh with transobturator and suprapubic suspension of bladder and apical suspension

송준백 대한산부인과학회 2005 대한산부인과학회 학술대회 Vol.91 No.-

메틸트리클로로실란을 이용한 화학증착 탄화규소의 증착율 및 굽힘강도 특성에 미치는 온도의 영향

송준백 ( Jun-baek Song ),임항준 ( Hangjoon Im ),김영주 ( Young-ju Kim ),정연웅 ( Youn-woong Jung ),류희범 ( Hee-beom Ryu ),이주호 ( Ju-ho Lee ) 한국복합재료학회 2018 Composites research Vol.31 No.2

화학기상증착 탄화규소(CVD-SiC)의 높은 증착율과 우수한 굽힘강도 특성을 얻기 위해 증착온도에 대한 영향을 연구하였다. Hot-wall CVD 방법으로 메틸트리클로로실란(MTS : CH₃SiCl₃)을 이용하여 1250~1400℃ 조건에서 제조된 탄화규소는 95.7~117.2 μm/hr 정도의 증착율을 보였다. 율속반응은 1300℃ 미만에서는 표면반응, 그 이상의 온도에서는 물질전달 지배영역 특성을 나타내었다. Arrhenius plot을 통해 계산한 활성화 에너지는 각각 11.26kcal/mole과 4.47 kcal/mole이였다. 증착온도별 표면 형상은 1250℃ pebble에서 1300℃ facet 구조로 변하였고, 1350℃ 이상에서는 multi-facet 구조를 나타내었다. 단면 형상은 1300℃ 이하에서 columnar, 1350℃ 이상에서 isometric 구조를 보였다. 결정상은 모두 β-SiC로 확인되었지만 결정성장 방향은 1250℃ (111)에서 1300℃ 이상부터 (220) peak가 관찰되었으며, 1400℃에서는 (220)으로 완전히 변함을 알 수 있었다. 굽힘강도 특성은 증착온도가 증가할수록 치밀화되고, columnar에서 isometric 조직으로 변화되면서 1350℃에서 최대값을 나타내었으며, 1400℃에서는 grain size 증가와 결정성장 방향이 최밀충진면인 (111)에서 (220)으로 완전히 변하면서 감소된 것으로 보인다. The effects of deposition temperature on chemical vapor deposited silicon carbide (CVD-SiC) were studied to obtain high deposition rates and excellent bending strength characteristics. Silicon carbide prepared at 1250~1400℃ using methyltrichlorosilane(MTS : CH₃SiCl₃) by hot-wall CVD showed deposition rates of 95.7~117.2 μm/hr. The rate-limiting reaction showed the surface reaction at less than 1300℃, and the mass transfer dominant region at higher temperature. The activation energies calculated by Arrhenius plot were 11.26 kcal/mole and 4.47 kcal/mole, respectively. The surface morphology by the deposition temperature changed from 1250℃ pebble to 1300℃ facet structure and multi-facet structure at above 1350℃. The cross sectional microstructures were columnar at below 1300℃ and isometric at above 1350℃. The crystal phases were all identified as β-SiC, but (220) peak was observed from 1300℃ or higher at 1250℃ (111) and completely changed to (220) at 1400℃. The bending strength showed the maximum value at 1350℃ as densification increased at high temperatures and the microstructure changed from columnar to isometric. On the other hand, at 1400℃, the increasing of grain size and the direction of crystal growth were completely changed from (111) to (220), which is the closest packing face, so the bending strength value seems to have decreased.

신경내분비적 분화가 포함된 자궁의 악성혼합 뮬러리안 종양

송준백 ( Jun Baek Song ),김준홍 ( Jun Hong Kim ),박옥랑 ( Ok Rang Park ),김주경 ( Ju Kyeong Kim ),김태상 ( Tae Sang Kim ),김동자 ( Dong Ja Kim ) 대한산부인과학회 2003 Obstetrics & Gynecology Science Vol.46 No.1

Malignant mixed mullerian tumor (MMMT) of the uterus are uncommon tumor and highly malignant containing epithelial and stromal components which is classified as homologous or heterologous based on the nature of sarcomatous component. It is highly malignan

폐유리를 재활용한 타일 제조 및 물리적 특성

김영길,정연길,송준백,신민철,이희수,Kim, Young-Kil,Jung, Yeon-Gil,Song, Jun-Baek,Shin, Min-Chul,Lee, Hee-Soo 한국세라믹학회 2005 한국세라믹학회지 Vol.42 No.3

폐유리와 점토를 이용하여 일축 가압 성형법으로 타익을 제조하였다. 유리함량, 소성온도 및 소성시간에 따른 타일의 흡수율, 밀도, 겉보기 기공률, 압축강도, 마모감량 등을 고찰하였다. 소성온도 및 유리함량이 증가함에 따라 타일의 특성은 향상되었다. 폐유리를 $70wt.\%$ 사용하고 $1,050^{circ}C$에서 소성한 타일이 가장 우수한 특성을 나타내었으며, 이 때의 흡수율, 밀도, 겉보기 기공률, 압축강도, 마모감량은 각각 $0.9\%,\;2.3g/cm^3,\;2.1\%$, 210 MPa, 0.022g이었다. 이는 유리상의 혈성에 의잔 결과로서 타일의 기공 감소 및 치밀화에 기여하기 때문이다. 제조된 타일의 특성은 상용화되고 있는 일반 자기질 타일과 비교하여 우수한 특성을 나타내고 있으며, 바닥 및 내$\cdot$외벽용 무유타일로 적용 가능할 것이다. Wall and floor tiles were fabricated by a dry pressing method using waste glass and clay. The physical properties of the tiles such as absorption, bulk density, porosity, compressive strength, and abrasion loss are investigated with the firing temperature and glass contents. The physical properties are improved with increasing the firing temperature and glass contents. The composition containing the glass of $70 wt%$ and fired at $1050^{\circ}C$ for 2 h has the good properties. The optimal properties obtained in the tiles are the water absorprion of about $0.9\%$, the bulk density of about $2.3\;g/cm^3$, the apparent porosity of about $2.1 \%$, the compressive strength of about 210 MPa, and the abrasion loss of about 0.022 g, when the composition containing the glass of $70\;wt\%$ is fired at $1050^{\circ}C$. The physical proper1ies of tiles fabricated were enhanced compared to the commercial clay tiles, due to easy melting and densification of glassy phase during the firing process.

복막 봉입체 낭포의 임상적 고찰

김수현 ( Su Hyun Kim ),송준백 ( Jun Baek Song ),박정현 ( Jeong Hyun Park ),이창환 ( Chang Hwan Lee ),구수정 ( Su Jung Ku ),김태상 ( Tae Sang Kim ) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.12

목적 : 대구 파티마병원에서 6년 동안 경험한 복막 봉입체 낭포를 조사 분석하기 위함이다. 연구 방법 : 1996년 1월 1일부터 2001년 12월 31일까지 진단, 치료한 복막 봉입체 낭포 13예에 대해 의무기록, 수술기록 및 병리보고서를 검토하여 임상적 특징, 진단 방사선적 소견과 치료 방법 등을 문헌 고찰과 함께 비교하였다. 결과 : 복막 봉입체 낭포 환자의 연령 분포는 대부분 가임기이다. 주증상은 하복부 통증이나 만져지는 복부 종괴가 많았다. 대 Objective : The aim of this study is to review 6 years` experience of peritoneal inclusion cysts at our hospital. Methods : A retrospective study of 13 cases of peritoneal inclusion cysts between Jan. 1, 1996 and Dec. 31, 2001 was carried out and then cli

적층 SMD형 PTC 써미스터의 열처리 조건에 따른 PTCR 특성 변화

이미재,장재원,임태영,박성철,송준백,한정화,Lee, Mi-Jai,Jang, Jae-Woon,Lim, Tae-Young,Park, Seong-Chul,Song, Jun-Baek,Han, Cheong-Hwa 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.5

Electrical properties of the laminated SMD-type PTC thermistor for microcircuit protection were investigated as a function of calcination and sintering temperature. $BaTiO_3$ with $Y_2O_3$ and $MnO_2$ were calcined at 1000 to $1150^{\circ}C$ for 2h and the laminated SMD-type PTC thermistor was sintered at 1350 to $1400^{\circ}C$ for 2h in a reduced atmosphere (1% $H_2/N_2$). Sintered density of the sample was dependent on the calcination and sintering temperature. Electrical properties of the sintered samples were strongly dependent on the densities of samples. For the samples with density below 4.6 g/$cm^3$, the insulator characteristics were observed, while PTC jump characteristics (R150/R30) were disappeared for the sample with density above 5.05 g/$m^3$. Optimal PTC characteristics were obtained for the sintered samples with density of 5.05 g/$m^3$. The laminated SMD-type PTC thermistor prepared by calcination at $1100^{\circ}C$ for 2h and sintering at $1270^{\circ}C$ for 2h showed the room temperature resistivity of $11{\Omega}{\cdot}cm$ and PTC jump characteristics of $10^2$ order.

초소형 회로보호용 적층 PTC 써미스터의 출발원료 및 Sr 첨가에 따른 전기적 특성

이미재,김빛남,황종희,김진호,박성철,송준백,Lee, Mi-Jai,Kim, Bit-Nan,Hwang, Jong-Hee,Kim, Jin-Ho,Park, Seong-Chul,Song, Jun-Baek 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.6

We investigated the electrical properties the starting material and sintering condition on the laminated PTC thermistor for micro circuit protection. The influences of $BaTiO_3$ powder with the 0.3 and 0.45 ${\mu}m$ size and the electrical characteristics (Ba,Sr)$TiO_3$ sintered at 1350~1400$^{\circ}C$ for 2 h in a reducing atmosphere (1% $H_2/N_2$). The sintered (Ba,Sr)$TiO_3$ was increased pore and the grain size was decreased according to increasing Sr additions. In relative permittivity, the phase transition temperature of (Ba,Sr)$TiO_3$ was decreased for 2.5$^{\circ}C$ according to increasing 0.01 mole Sr additions, and the phase transition dose not appeared about 0.3 mole Sr addition. The (Ba,Sr)$TiO_3$ was show the low resistance from 0.01 mole to 0.05 mole by Sr addition, regardless of sintering temperature. The (Ba,Sr)$TiO_3$ was show $10^2$ jump order at 0.1 and 0.2 mole Sr addition, and PTCR of the sintered $(Ba_{0.7}Sr_{0.3})TiO_3$ does not appeared about 0.3 mole Sr addition, regardless of the sintering temperature and starting material size.

무심쌍태아 1례

박학열(Hak Youle Park),서준영(Jun Young Seo),송준백(June Baek Song),김태상(Tae Sang Kim),김익수(Ik Soo Kim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.10

Acardiac twinning affects 1 in 100 monozygotic twin pregnancies and 1 in 35,000 pregnancies overall. This condition is characterized by the absence or rudimentary development of fetal heart, and associated with various anomaly. The presence of an acardiac twin requires the normal (or pump) twin to provide circulation for itself, as well as the acardiac sibling. The acardiac malformations are uniformly fatal in the affected twin, and mortality in the co-twin is as high as 55%. The principal perinatal problems associated with acardiac twinning are pump-twin congestive heart failure, maternal hydramnios, and preterm delivery. We recently experienced a case of acardius anceps associated with a normal male infant, so present with a brief review of the literature.

반응소결 탄화규소의 다양한 α-SiC 조성에 따른 기계적 특성과 전기저항 특성에 관한 연구

김영주 ( Young Ju Kim ),박영식 ( Young Shik Park ),정연웅 ( Youn Woong Jung ),송준백 ( Jun Baek Song ),박소영 ( So Young Park ),임항준 ( Hang Joon Im ) 한국복합재료학회 2012 Composites research Vol.25 No.6

저저항 Si-SiC 소결체 제조를 위해 α-SiC에서 조성과 C의 양을 변화시키면서 반응소결 특성을 고찰하였다. 시료준비는 정수압으로 성형체를 제조하였고, 용융Si 반응소결을 통해 시험편을 준비하였다. 반응소결체의 미세구조, 기계적 특성 및 전기 저항 분석 결과 용융Si과 반응 후 미립의 β-SiC가 생성되었고, 치밀한 소결체를 형성하였다. 미립 β-SiC 생성량은 카본 양 에 따라 증가하였다. 그리고 C함량 10wt%이내에서 기계·R전기저항특성은 입도조성 영향이 크고 카본 함량 10wt%이상에서는 상전이 반응의 영향이 큼을 알 수 있었다. For the manufacture of low resistance Si-SiC composite, the properties of reaction sintering in the green body of various mixed α-SiC powder size with the various carbon contents from 0wt% to 20wt% were investigated. The samples preparation was green body by CIP method under this condition, molten silicon infiltration process was conducted to reaction bonded silicon carbide. the results of sintered density, 3-point bending strength and resistance of analysis showed that varied carbon and silicon melt reacted to convert to fine β-SiC particle and the structure was changed to dense material. The amount of fine β-SiC particle was gradually increased as carbon content increase. According to mixed composite, it``s mechanical and specific resistivity properties was strongly influenced by carbon content within 10wt% more then carbon content 10wt% was strongly influenced by phase transition.

선행 제왕절개 임부의 경질분만에 대한 임상적 고찰

왕중서(Joong Seo Wang),박후철(Hoo Chul Park),김극원(Geug Won Kim),송준백(June Baek Song),이계현(Kei Hyun Lee),강상대(Sang Dae Kang) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.8

목적: 선행 제왕절개 임부에서 시도분만의 결과 및 안전성을 알기 위하여 본 연구를 시행 하였다. 연구방법: 1997년 5월부터 1998년 4월까지 마산 파티마병원 산부인과에서 분만한 선행 제왕절개 임부 303명을 대상으로 시도분만에 동의한 62명에게 질식분만을 시행하여 그 빈도, 성공률, 모성 이환률, 주산기 이환률과 사망률등을 비교 분석하였다. 결과: 선행 제왕절개 임부 303예 중 62예(20.5%)에서 시도분만을 시행하여 질식분만한 경우는 54예(87.1%)이었고, 8예(12.9%)는 제왕절개 분만을 하였다. 계획 제왕절개를 하였던 241예의 수술 적응증은 시도분만을 원하지 않은 경우(51.9%), 난관결찰술을 원해서(17.4%), 2회 이상 선행 제왕절개를 했던 경우(7.5%)등이다. 선행 제왕절개의 적응증이 난산인 경우에 성공적으로 질식분만한 경우는 85.0%(17/20)이며 난산이 아닌 경우는 88.1%(37/42)이다. 선행 제왕절개의 적응증에 따른 시도분만의 성공률에 유의한 차이는 없었다(P>0.05). 시도분만군에서 모성사망이나 자궁파열은 1예도 없었다. 계획 제왕절개군과 시도분만군간의 모성 이환률, 주산기 이환률 및 사망률에 대한 비교에서 유의한 차이는 없었다(P>0.05). 결론: 엄격한 적응증하에서의 선행 제왕절개 임부에 대한 질식분만의 시도는 비교적 안전하며, 계속 증가하고 있는 제왕절개의 빈도를 줄일 수 있을 것으로 사료된다. Objective: The purpose of this study was to evaluate the outcome and safety of vaginal delivery after previous cesarean birth. Methods: This study was based on 303 cases of delivery with previous cesarean birth at Masan, Fatima Hospital from May, 1997 to April, 1998. Among them, 62 cases had performed trial of labor. We had made a comparison between elective repeat section group and trial of labor group by analizing the frequency, successful rate, maternal morbidity, perinatal morbidity and mortality. Results: Among 303 cases with previous cesarean birth, trial of labor was done in 62 cases(20.5%). Among trial of labor group, vaginal delivery was done in 54 cases (87.1%) and repeat section was done in 8 cases(12.9%). Indications for elective repea section before the onset of labor were refuse trial of labor(51.9%), request for tubal ligation(17.4%), and previous section ≥2(7.5%), etc. The successful rate of vaginal delivery according to indication for previous cesarean birth was 85.0%(17/20) in the cases of dystocia and 88.1%(37/42) in the cases except dystocia. The successful rate was not influenced by the indication for previous cesarean birth(P>0.05). There were no maternal death or uterine rupture in the cases of trial of labor. There were no significant difference between elective repeat section group and trial of labor group in maternal morbidity, perinatal morbidity and mortality(P>0.05). Conclusion: Under strict indications, vaginal delivery subsequent to cesarean birth may be safe, and can reduce the rate of cesarean section that was increased constantly.