TINA 기반의 단말 이동성 기능 설계

송경철(Kyoung-Cheol Song),이상백(Sang-Baek Lee),박동선(Dong-Sun Park) 한국산업정보학회 2000 한국산업정보학회 학술대회논문집 Vol.2000 No.5

Double CFT기둥의 내화성능에 대한 실험적 연구

송경철(Song Kyung-Chul),방중석(Bang Jung-Seok),박수희(Park Su-Hee),정경수(Chung Kyung-Soo),최성모(Choi Sung-Mo) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)

Although an unprotected CFT column with a high axial-load ratio can be used to secure fire resistance for two hours or less in low-rise buildings, it does not satisfy the three-hour-long fire resistance required in high-rise buildings. Accordingly, so that the unprotected CFT column could be used for high-rise buildings, additional measures for the improvement of its fire resistance should be suggested. In this regard, the use of a CFDST (Concrete-filled Double Skin Tubular) column as a measure for improving the fire resistance of the unprotected CFT column was suggested in this paper. A fire resistance test was conducted on an unprotected CFT column and a CFDST column in real scale, under a load. Through such test, the effect of the CFDST column on fire resistance was evaluated and then compared with that of a variant shape of the cross-section of a steel column.

유무선 통합을 지향하는 3세대 WLL 시스템 개발 동향과 전망

송경철(Kyung Cheol Song),김종칠(Jong Chil Kim),유덕배(Deog Bae Yu),김성일(Sung Il Kim) 한국통신학회 2002 한국통신학회 학술대회논문집 Vol.2002 No.11

강합성구조 국제 학회 Steel Concrete Composite and Hybrid Structures(ASCCS`09) 참석 후기

송경철(Kyung Chul Song),이성회(Seong Hui Lee) 한국강구조학회 2009 韓國鋼構造學會誌 Vol.21 No.4

임신중기 원인불명의 융모성 성선자극호르몬 상승과 임신예후와의 연관성

송경철(Kyung Chul Song),이지성(Ji Sung Lee),임승욱(Seung Ug Lim),엄기남(Gi Nam Eom),강철규(Cheol Gyu Kang),최유덕(Yu Duk Choi),김석영(Sug Young Kim),황병철(Byoung Chul Hwang),김광준(Kwang Jun Kim),이의돈(Eui Don Lee),박찬용(Chan Yong 대한산부인과학회 2001 Obstetrics & Gynecology Science Vol.44 No.8

N/A Objective : The purpose of this study was to compare the neonatal and maternal infectious morbidity between single and multiple courses of antenatal betamethasone treatment in patients with preterm premature rupture of membranes. Methods : One hundred seventy patients who delivered neonates between 28 and 34 weeks' gestation after preterm premature rupture of membranes from January 1992 to July 2000 were reviewed retrospectively. Patients were divided into 3 groups on the basis of the following betamethasone exposures: (1) none (control subjects), (2) betamethasone 4 mg IM, IV simultaneously and then 4 mg IV q 8 hours for 24 hours (single course) and (3) weekly administration after initial single course (multiple courses). All included patients received prophylactic antibiotics for group B streptococci. The statistical analyses were done using χ2 test, Fisher's exact test and one way analysis of variance (ANOVA). Multiple logistic regression analysis was performed to determine the confounding effect of the multiple variables those were considered as risk factors for neonatal sepsis. Results : This study included 67 patients in the control group, 60 patients in the single course group, and 43 patients in the multiple courses group. The latency (p=.0001) was significantly longer in the patients exposed to multiple course than the patients in the control group and those in the single course group. No significant difference was demonstrated in the incidence of neonatal sepsis (p=.881) and postpartum endometritis (p=.619) among the three groups. Neonatal sepsis was significantly associated with clinical chorioamnionitis (p=.022). Conclusion : According to our data, multiple courses of antenatal betamethasone treatment in patients with preterm premature rupture of membranes was not associated with the increased incidence of neonatal sepsis and postpartum endometritis.

외상성 중심성 척수 증후군 후 신경학적 및 기능적 결과

송경철(Kyoung-Chul Song),유재원(Jae-Won You),김현학(Hyun-Hak Kim),손홍문(Hong-Moon Sohn) 대한정형외과학회 2014 대한정형외과학회지 Vol.49 No.1

목적: 외상성 중심성 척수 증후군에서 수술적 치료와 보존적 치료의 신경적 및 기능적 결과를 비교하여 치료의 방향을 결정하고 호전에 영향을 미치는 요소들을 알아보고자 하였다. 대상 및 방법: 2005년 1월부터 2008년 12월까지 중심성 척수 증후군으로 진단받고, 최소 1년 이상 추시 관찰이 가능했던 28예를 후향적으로 분석하였다. 수술적 치료군(group 1)이 15예, 보존적 치료군(group 2)이 13예였으며, 방사선적 평가는 maximum canal compromise (MCC), maximum spinal cord compression (MSCC), 기능적 결과는 American Spinal Injury Association motor score (AMS), Japanese Orthopaedic Association (JOA) score, neck disability index (NDI)를 사용하였다. 결과: MCC는 평균 47.2%, MSCC는 평균 20.0%였으며, 최종 AMS는 평균 92.0 (group 1: 92.9, group 2: 90.9), JOA score는 평균 12.8 (group 1: 14.0, group 2: 11.4), NDI는 평균 25.0 (group 1: 25.7, group 2: 24.3)이었다. 결론: 외상성 중심성 척수 증후군 치료에서 연령이 젊고, 골절이 동반된 고 에너지 손상이면서 척수 압박은 심하나 초기 신경적 결손이 심하지 않은 경우 조기에 수술적 치료를 시행하는 것이 좋을 것으로 생각된다. Purpose: The purpose of this study was to determine the direction for treatment and to evaluate factors influencing improvement by comparison of neurologic and functional outcomes of surgical treatment and conservative treatment for traumatic central cord syndrome. Materials and Methods: A total of 28 patients, who were available for follow-up for at least more than one year from January 2005 to December 2008, who were diagnosed as traumatic central cord syndrome were analyzed retrospectively. Fifteen patients underwent surgical treatment (group 1), and 13 patients received conservative treatment (group 2). Maximum canal compromise (MCC), and maximum spinal cord compression (MSCC) were used for radiologic assessment, and American Spinal Injury Association (ASIA) motor score, Japanese Orthopaedic Association (JOA) score, and neck disability index (NDI) were used for assessment of functional outcomes. Results: The mean MCC was 47.2%, mean MSCC was 20.0%, and mean ASIA motor scale was 92.0 (group 1: 92.9, group 2: 90.9) at the final follow-up. The mean JOA score was 12.8 (group 1: 14.0, group 2: 11.4) and mean NDI was 25.0 (group 1: 25.7, group 2: 24.3) at the final follow-up. Conclusion: It is concluded that if a patient with traumatic central cord syndrome is young, with a high energy injury combined with fractures, and has severe spinal compression and mild initial neurologic defect, early surgical treatment would be needed as soon as possible.

한국 여성의 FMR1 유전자의 CGG 반복횟수 분포

송경철(Kyung Chul Song),김광준(Gwang Jun Kim),황유진(Yu Jin Whang),최수란(Su Ran Choi),이순표(Soon Pyeu Lee),황병철(Byung Chul Whang),이의돈(Eyi Don Lee) 대한산부인과학회 2002 Obstetrics & Gynecology Science Vol.45 No.6

연구 목적 : 취약 X 증후군은 FMR1 유전자 CGG 삼염기의 이상 반복에 의해 발생되며, 모체에서 삼염기의 반복횟수가 많을수록 다음 대에서 이상 반복이 나타날 가능성이 높아짐으로 질환의 발생위험도가 높다. 또한 이러한 FMR1 유전자 CGG 염기반복 횟수는 각 인종마다 차이가 있다고 알려져 있다. 본 연구는 우리나라 일반 여성의 CGG 삼염기 반복횟수 분포를 알아봄으로 취약 X 증후군의 위험율과 보인자율을 알아보고자 하였다. 대상 및 방법 : 1999년 1월부터 1999년 12월까지 가천의대 산부인과 외래를 방문한 정신지체가 없는 일반 여성 1000명의 혈액에서 백혈구를 채취하여 DNA를 분리하였고 중합효소 연쇄반응 (PCR)을 이용하여 FMR1 유전자의 CGG 삼염기 반복횟수를 분석하였다. 결과 : 우리나라 여성의 FMR1 유전자의 CGG 삼염기 반복횟수는 6회에서 50회 사이에 존재하였으며, 삼염기 반복의 평균은 26.9회였다. 하나의 밴드가 나타난 경우는 6-20회 사이는 34명, 21-25회는 325명, 26-30회는 260명이었고, 31-35회는 145명, 36-50회는 3명이였으며, 13명에서는 밴드가 보이지 않았다. 또한 두 개 이상의 밴드가 나타난 경우는 446예 (22.3%)로 대부분 (396예)이 21-35회 사이에 존재하였다. 결론 : 우리나라 여성의 FMR1 유전자의 CGG 삼염기 반복횟수 분포는 21회에서 25회 사이가 가장 많았으며, 35회 미만이 전체의 97%를 차지하여 취약 X 증후군의 위험도는 다른 인종에 관한 보고와 비교하여 낮다고 볼 수 있다. Objective : Fragile X syndrome is the most common form of familial mental retardation, attributable to (CGG)n expansion in the FMR1 gene. This study was undertaken to ascertain the distribution of FMR1 CGG repeat in the general Korean women and to identify ethnic difference in FMR1 CGG repeat number. Material and method : Between January 1999 and December 1999, we evaluated 1,000 low risk women who visited Gachon Medical School Hospital. DNA samples were extracted from the venous bloods by routine methods, and G-C specific Polymerase Chain Reaction (PCR)s were performed to evaluate FMR1 CGG repeat number. Results : Mean FMR1 CGG repeat number was 26.9 (6-50), single PCR bands were detected in 776 cases (77.7%). There were two more bands in 22.3% of the cases. Most of the cases are located between 21 and 35 repeats, especially 21-25 repeats. The pattern of distribution of CGG repeat is dispersed. In 13 cases, we could not obtain the PCR results. Conclusion : Low risk of transmission rate of the FRX in Korea can be expected.

ASFE`09 International Conference 참관기

송경철(Kyung Chul Song),박수희(Su Hee Park) 한국강구조학회 2009 韓國鋼構造學會誌 Vol.21 No.2

일정 축력을 받는 콘크리트충전 원형 강관기둥의 내화성능 평가

박수희,송경철,류재용,정경수,최성모,Park, Su Hee,Song, Kyung Chul,Ryoo, Jae Yong,Chung, Kyung Soo,Choi, Sung Mo 한국강구조학회 2008 韓國鋼構造學會 論文集 Vol.20 No.5

In this research, the fire resistance of Concrete-Filled Circular Steel Tube Columns (CFT) was evaluated by numerical analysis. As the materials of CFT columns, the steel of SPSR 400 grade and the concrete of 27.5MPa, 37.8MPa strengths were used. Significant parameters,such as concrete strength, axial load, and cross-sectional dimensions were determined. To verify the accuracy of the numerical analysis,the analysis results were compared with the former experiment results. The effect of the fire resistance time, axial load ratio, cross-sectional dimensions and concrete strength was evaluated by comparison with the fire resistance of the square CFT columns. This research showed that the structural behavior and fire resistance from the findings of numerical parametric studies showed a similarity to that of the experimental results. Therefore, this numerical analysis is reasonable in estimating the fire resistance of the circular CFT column. 본 연구에서는 콘크리트충전 원형강관(원형 CFT)기둥의 내화성능을 평가하기 위하여 수치해석을 수행하였다. 강관은 SPSR 400 강재를 사용하였으며 강관 내에는 27.5MPa와 37.8MPa 강도의 콘크리트를 사용하였다. 콘크리트 강도, 작용 축력, 단면 직경을 변수로 설정하였다. 수치해석의 정확성을 검증하기 위하여, 기존의 각국 내화성능설계식들에 의한 계산 결과값과 비교 평가 하였다. 또한, 기존의 실대 원형 CFT기둥의 내화성능 평가 실험 결과와 함께 비교 분석하여 수치해석의 타당성을 검증하였다. 원형 CFT기둥의 내화실험 및 수치해석적 연구를 통해 도출된 내화저항시간과 축력비, 단면직경, 콘크리트 강도의 영향을 각형 CFT기둥의 내화성능과 비교 분석하여 각 영향인자들의 영향을 평가하였다. 본 연구의 수치해석적 연구는 실험결과와 비슷한 거동 및 내화성능을 보였다. 따라서 본 연구에서의 수치해석에 의한 CFT기둥의 내화 성능 예측은 타당하다고 판단된다.

관혈적 정복술 및 내고정술 후 군인에게 발생한 경비골 원위부 골결합증(1예 보고)

이준영,남기영,송경철,Lee, Jun-Young,Nam, Ki-Young,Song, Kyoung-Chul 대한족부족관절학회 2010 대한족부족관절학회지 Vol.14 No.1

The scanty literature on distal tibiofibular synostosis includes descriptions of relatively few specific complaints. Here we report a case of a 24-year-old young soldier who sustained a left ankle lateral malleolar fracture about 6 months ago and was initially treated by the open reduction and internal fixation with plate & screw. But 6 months later, he suffered from an vague ankle pain, each time the symptoms occurred right after an active ambulation, ankle dorsiflexion, especially when he had exercised aggressively. The radiographs revealed that there was a mature distal tibiofibular synostosis. We treated the patient with surgical excision of synostosis. Post-operative condition was satisfied to all concern and the result was found to be excellent during one-year follow-up.