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김범수,Kim, Bom Soo 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.4
Open reduction and internal fixation is currently considered as a gold standard of treatment in most of the intra-articular calcaneal fractures. Among various different approaches, extensile lateral approach is the most popular since it provides good exposure to the subtalar joint. However, wide skin incision followed by extensive soft tissue dissection leading to increased risk of wound breakdown is the most serious drawback. Sinus tarsi approach, a minimal invasive technique to approach the subtalar joint and reduce the intra-articular calcaneal fractures, provides good clinical outcome and less wound complications compared to the extensile lateral approach. This article introduces the surgical technique and review of the literature regarding the sinus tarsi approach.
김범수,김가영,Kim, Beomsoo,Kim, Ga-young 한국개발연구원 2015 KDI Journal of Economic Policy (KDI JEP) Vol.37 No.-
Park et al.(2012)은 서울의 학군 내 고등학교 무작위 배정정책을 이용하여 특정 학생이 남녀공학에 배정될지 남(여)학교에 배정되는지에 따라 대학수학능력시험에서 학생들의 성적이 어떠한 영향을 받는지를 확인하고자 하였다. 하지만 이 논문은 학군 내 무작위 배정이 아닌 대중교통을 이용하여 30분 이내 학교들 중에서만 무작위 배정이 이루어졌다는 중요한 현실을 고려하고 있지 않으므로 본 논문에서는 각각의 남녀공학과 가장 가까운 남(여)학교 두 곳을 찾아서 이 학교들과의 성적의 차이만을 찾음으로써 보다 정확한 남녀공학과 비교한 남(여)학교의 효과를 측정하고자 하였다. 또한 Park et al.(2012)에서는 한 해 연도의 자료만을 사용하였지만 본 논문에서는 다년도의 자료를 이용하여 결과가 안정적인지도 확인하였다. 이러한 보다 정확한 분석의 결과, 남녀 모두 단성학교가 공학에 비해 통계적으로 유의하게 성적이 향상되는 결과를 보이고 있다. 이 결과를 Park et al.(2012)과 비교하면 여학생의 경우에는 단성학교의 효과가 Park et al.(2012)보다 작고, 남학생의 경우에는 Park et al.(2012)보다 큰 것으로 확인되었다. Park et al. (2012) examined the impacts of coeducation in high school on the college scholastic ability test using random assignment in Seoul high schools. However, the student random assignment in Seoul within a school district was performed only within 30 min commutable areas using public transportation and Park et al. (2012) did not aware of this rule. This paper reexamines the question by matching nearest two single sex schools with a coeducation school within a school district. We found single sex school students achieve higher test score than that of coeducation school for both male and female. The magnitude of test score improvement for female is smaller than that of Park et al. (2012). However, the magnitude for male is bigger than that of Park et al. (2012).
변동량 분석을 이용한 암반대수층의 수리학적 매개변수 산출
김범수,양동철,여인욱,Kim, Bum-Su,Yang, Dong-Chul,Yeo, In-Wook 한국지하수토양환경학회 2010 지하수토양환경 Vol.15 No.6
Derivative analysis, based on the derivative of the drawdown as a function of time (i.e., rate of drawdown change), was applied to the evaluation of hydraulic parameters of the aquifer as an aid of the aquifer test interpretation based on the Theis solutions. Pumping tests were conducted at a coastal fractured aquifer in Muan county, Korea, of which the drawdown data, measured at the two observation wells, were used for derivative analysis. Wellbore storage and transition period were hard to identify at conventional log-log and semi long plots, but was easily recognized by distinctive curves of positive unit slope, hump and negative unit slope in the derivative plot. For the observation well of OW-2 at which wellbore storage and transition lasted over an hour, conventional aquifer analysis would suffer from the uniqueness problems and in further result in erroneous hydraulic parameters. Derivative analysis was found to be effective for distinguishing the drawdown data directly reflecting the aquifer property from those reflecting non aquifer effects such as wellbore storage and transition, which offers a unified methodology to yield correct hydraulic parameters from aquifer test data.
장무지굴건 건초염에 대한 건내시경적 치료의 임상적 결과 및 합병증
김범수,최근홍,Kim, Bom Soo,Choi, Geun Hong 대한족부족관절학회 2013 대한족부족관절학회지 Vol.17 No.4
Purpose: To report the clinical outcomes and complications of flexor hallucis longus (FHL) tendoscopy using 3 portals. Materials and Methods: Between January 2012 and April 2013, 10 patients (10 ankles) received tendoscopic surgery for the treatment of FHL tenosynovitis. Patients complaining of pain and tenderness along the course of FHL despite over 6 months of conservative treatments were indicated for surgery. The mean age was 41.7 years (range: 18-57) and the follow up period was 12.7 months (range: 6-20). Tendoscopy was performed using posteromedial, posterolateral, and plantar portals. Clinical evaluations included preoperative and postoperative visual analogue scale (VAS), American orthopaedic foot and ankle society (AOFAS) score, and patients' satisfaction. Results: Tendoscopic findings included tenosynovitis in 10 cases, degenerated vinculae in 6 cases, stenosis of the tendon at its entrance into the fibro-osseous tunnel in 5 cases, and degenerative partial tendon tear in 3 cases. Two cases had associated symptomatic os trigonum and 3 cases had posterior ankle impingement syndrome. Preoperative pain decreased from median VAS 6 (range: 4-10) to 2.1 (range: 1-5) at the last follow up and AOFAS score improved from 50.1 (range: 36-63) to 82.1 (range: 61-89) (p<0.05). Nine patients were satisfied or very satisfied with the outcome. Injury of the lateral plantar nerve occurred in one case. Conclusion: FHL tendoscopy using 3 portals is a feasible and useful minimal invasive surgical technique for the management of FHL tenosynovitis.