Outcomes of Internal Fixation with Compression Hip Screws in Lateral Decubitus Position for Treatment of Femoral Intertrochanteric Fractures

( Cheon-gon Park ),( Taek-rim Yoon ),( Kyung-soon Park ) 대한고관절학회 2018 Hip and Pelvis Vol.30 No.4

Purpose: Internal fixation using compression hip screws (CHS) and traction tables placing patients in the supine position is a gold standard option for treating intertrochanteric fractures; however, at our institution, we approach this treatment with patients in a lateral decubitus position. Here, the results of 100 consecutive elderly (i.e., ≥45 years of age) patients who underwent internal fixation with CHS in lateral decubitus position are analyzed. Materials and Methods: Between March 2009 and May 2011, 100 consecutive elderly patients who underwent internal fixation with CHS for femoral intertrochanteric fracture were retrospectively reviewed. Clinical outcomes (i.e., Koval score, Harris hip score [HHS]) and radiographic outcomes (i.e., bone union time, amount of sliding of lag screw, tip-apex distance [TAD]) were evaluated. Results: Clinical assessments revealed that the average postoperative Koval score decreased from 1.4 to 2.6 (range, 0-5; P<0.05); HHS was 85 (range, 72-90); and mean bone union time was 5.0 (range, 2.0-8.2) months. Radiographic assessments revealed that anteroposterior average TAD was 6.95 (range, 1.27-14.63) mm; lateral average TAD was 7.26 (range, 1.20-18.43) mm; total average TAD was 14.21 (range, 2.47-28.66) mm; average lag screw sliding was 4.63 (range, 0-44.81) mm; and average angulation was varus 0.72°(range, -7.6°-12.7°). There were no cases of screw tip migration or nonunion, however, there were four cases of excessive screw sliding and six cases of varus angulation at more than 5°. Conclusion: CHS fixation in lateral decubitus position provides favorable clinical and radiological outcomes. This technique is advisable for regular CHS fixation of intertrochanteric fractures.

난방시스템의 소비에너지 최소화를 위한 최적제어 적용방안 연구

안병천(Byung-Cheon Ahn),최상곤(Sang-Gon Choi),천원익(Won-Ig Cheon),조성환(Sung-Hwan Cho),양훈철(Hoon-Cheol Yang) 대한설비공학회 2004 대한설비공학회 학술발표대회논문집 Vol.2004 No.-

Mechanisms of Motility Change on Trinitrobenzenesulfonic Acid-Induced Colonic Inflammation in Mice

Cheon, Gab Jin,Cui, Yuan,Yeon, Dong-Soo,Kwon, Seong-Chun,Park, Byong-Gon The Korean Society of Pharmacology 2012 The Korean Journal of Physiology & Pharmacology Vol.16 No.6

Ulcerative colitis is an inflammatory bowel disease (IBD) characterized by recurrent episodes of colonic inflammation and tissue degeneration in human or animal models. The contractile force generated by the smooth muscle is significantly attenuated, resulting in altered motility leading to diarrhea or constipation in IBD. The aim of this study is to clarify the altered contractility of circular and longitudinal smooth muscle layers in proximal colon of trinitrobenzen sulfonic acid (TNBS)-induced colitis mouse. Colitis was induced by direct injection of TNBS (120 mg/kg, 50% ethanol) in proximal colon of ICR mouse using a 30 G needle anesthetized with ketamin (50 mg/kg), whereas animals in the control group were injected of 50% ethanol alone. In TNBS-induced colitis, the wall of the proximal colon is diffusely thickened with loss of haustration, and showed mucosal and mucular edema with inflammatory infiltration. The colonic inflammation is significantly induced the reduction of colonic contractile activity including spontaneous contractile activity, depolarization-induced contractility, and muscarinic acetylcholine receptor-mediated contractile response in circular muscle layer compared to the longitudinal muscle layer. The inward rectification of currents, especially, important to $Ca^{2+}$ and $Na^+$ influx-induced depolarization and contraction, was markedly reduced in the TNBS-induced colitis compared to the control. The muscarinic acetylcholine-mediated contractile responses were significantly attenuated in the circular and longitudinal smooth muscle strips induced by the reduction of membrane expression of canonical transient receptor potential (TRPC) channel isoforms from the proximal colon of the TNBS-induced colitis mouse than the control.

Two cases of actinic cheilitis treated with ingenol mebutate gel

( Byung Gon Choi ),( Min Seok Hur ),( Hye In Cheon ),( Song Hee Han ),( Hae Jeong Youn ),( Min Jung Kim ),( Nam Kyung Roh ),( Soo Young Kim ),( Yang Won Lee ),( Yong Beom Choe ),( Kyu Joong Ahn ) 대한피부과학회 2016 대한피부과학회 학술발표대회집 Vol.68 No.1

Actinic cheilitis (AC) is considered as a precancerous disease that has potential to progress to invasive squamous cell carcinoma. Its treatment, therefore, should be radical, but the optimal therapy is not well established. Ingenol mebutate is a new topical drug extracted from plant Euphorbia peplus, which was approved by the US Food and Drug Administration for field therapy of actinic keratosis (AK) in 2012. Although it was approved for treatment of AK there are attempts of applying it on other lesions such as Bowen’s disease, squamous cell carcinoma and basal cell carcinoma. There is only one case report, however, of AC treatment with ingenol mebutate in Spain, and no report in Korean literature. We applied ingenol mebutate 0.015% gel to two 65-year-old patients (one is female and the other is male) diagnosed with AC by punch biopsy. We made a barrier surrounding the accurate lesion by antimicrobial ointment and conducted spot therapy for reducing local skin reaction (LSR) and drug inflow into intraoral cavity. Eight weeks after the treatment, the size of lesions was much decreased in both patients. The female patient showed almost complete clearance, and less than 50% of lesions remained of the male patient. Erosion, discharge and mild pain were accompanied as LSR, and resolved in 2 weeks. We report our experience and suggest that ingenol mebutate 0.015% gel could be an effective and safe treatment option for AC.

A Method to Reduce the Human Error in the Design Process of the Auxiliary Feed-water System of APR

Jong Cheon,Han Gon Kim 대한인간공학회 2012 대한인간공학회 학술대회논문집 Vol.2012 No.5

Objective: This paper introduces a method to reduce the human error during the design process of the Auxiliary Feed-water System (AFS) of Advanced Power Reactor plus (APR+). Background: Korea Hydro & Nuclear Power Co. has been developing APR+, a type of GEN III+ reactor. The AFS feeds emergency water to steam generators to cool down the reactor coolant system when the main feed-water is lost. Specially, The AFS is important for core cooling against station black out like Fukushima accident. The AFS consists of two motor driven pumps, two turbine driven pumps, two water storage tanks and related pipes and valves. So, the AFS has a possibility to make human errors by operator. Method: In order to reduce the human error, The Passive Auxiliary Feed-water System (PAFS) replaces the conventional active AFS by introducing a natural driving force mechanism while maintaining the system's basic function of cooling down the primary side and removing the decay heat. The PAFS design consists of steam condensing heat exchanger, passive condensation cooling water tank, check valves, battery(Class 1E DC) powered isolation valves, piping, and instrumentation and control systems. Conclusion: It is shown that human error is significantly reduced due to the adoption of passive system by reducing human's intervention for system control during accident operation.

資産再評價公示가 株主의 富에 미치는 影響 : Cash Flow를 중심으로

윤석곤,전정수 남서울대학교 1998 남서울대학교 논문집 Vol.4 No.-

The asset revaluation system, which was introduced for the first time in 1958, has been amended eight times. This system stipulates that the company might voluntarily revaluate the book value of fixed assets to the market value when the rate of wholesale prices rises cumulatively over 25 percent. This study intends to analyzed the effect the announcement of asset revaluation commencement has on the abnormal rate of return and its determinants. To analyze the effect of revaluation commencement on the stock prices, the cumulative abnormal rate of return for the 61 cases between January 1, 1989 and December 31, 1996 was measured for 30 days before and after the announcement day of asset revaluation commencement using the market and risk adjusted returns model. For this perpose, cross-sectional regression analysis was conducted. The variables used for the model are the ratio of depreciation cost to sales, the ratio of the sum of capital surplus plus earned surplus to total assets, the ratio of bond to capital, the ratio of the sum of tangible fixed assets plus investment assets to total assets, the ratio of revaluation balance to total assets and the ratio of revaluation taxes to the revaluation balance. This paper contributes to the previous understanding for the relationship between the revaluation system and market behavior; that is, the revaluation system generally has an information content for the stock market behavior even though some variables have not.

정책결정자의 인지지도 비교를 통한 갈등 원인 분석: 구룡마을 개발갈등사례를 중심으로

천지은 ( Cheon Ji-eun ),김민곤 ( Kim Min-gon ),송용찬 ( Song Yong-chan ) 한국시스템다이내믹스학회 2018 한국시스템다이내믹스 연구 Vol.19 No.2

The purpose of this study is to draw a significant analysis by conducting a case study on the conflict case from Guryong Village development, through analyzing cognitive map with focusing on possible conflicts caused by differences in perceptive and cognitive structures of policymakers. For this study, official interviews and words from provincial governors in city of Seoul and Gangnam district were analyzed to draw a cognitive map. Furthermore, differences found in cognitive map as well as 1) target variable, 2) instrumental variable, 3) recognized causal relationship, 4) feedback loop cognition, and 5) word nuance rate (positive or negative) used by policymakers, were analyzed. According to results from the analysis, there were differences found in every factors and results from the interview performed with provincial governors in city of Seoul and Gangnam district, to study whether the analyzed results reflect actual reality, showed an identical conclusion with results from the analysis above. It implies that there actually was a difference in cognitive structure by differences in cognition on conflict of Gyrong Village development. This result reveals the fact that existing policies are unable to solve conflicts between governments caused by the difference in conception among policymakers and this leads to conclusion that institutional foundation making parties, central government, and civil society perform intervention on conflicts by enforcing more direct influential power on policymakers is required. This study has a significance in terms of that it studied potential for contributing to drawing proposal for solving conflicts by analyzing cause of conflict by utilizing cognitive map on the case study.

A Study On The Characterization Of Acid-Producing Fungi For Bioleaching Of Heavy Metals

Byung-Gon Ryu(류병곤),Hye Yeon Mun(문혜연),Wonsu Cheon(천원수),Min Jeong Seo(서민정),Jaeduk Goh(고재덕),Mi-Hwa Lee(이미화) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11

지방자치단체 복식부기 회계정보시스템의 품질과 사용자만족과의 관계

전정수(Cheon, Choung Soo),박문곤(Park, Moon Gon) 글로벌경영학회 2006 글로벌경영학회지 Vol.3 No.1

지방자치단체 복식부기․발생주의 회계는 지방재정법이 개정(법률 제7663호, 2005.8.4.)됨에 따라 2007년부터 전국적으로 실시할 계획이다. 복식부기․발생주의 회계 시험 운영과 동시에 진행하였던 정보시스템도 올바른 운영이 이루어져야한다. 이 시점에서 지방자치단체 복식부기 회계정보시스템에 대한 성과평가의 필요성을 인식하여 본 연구를 하게 되었다. 본 연구에서는 자산․부채의 평가관리기준 수립 및 전산시스템 구축이 완료된 강남구․부천시를 대상으로 설문조사 하여 수집한 자료를 기초로 지방자치단체 복식부기 회계정보시스템 품질변수(시스템 품질, 정보 품질, 서비스 품질)가 사용자만족에 미치는 영향에 대한 실증연구모형 및 가설을 설정하고 실증조사하였다. 본 연구를 위하여 지방자치단체 복식부기 회계정보시스템 시스템, 정보, 서비스 품질이 사용자 만족에 정(+)의 영향을 미칠 것이다. 라는 연구모형 및 가설을 설정하고, 가설검증을 위하여 SPSS 10.0K로 통계처리하였다. 그리고 다음과 같은 결론을 도출하였다. 본 연구에서의 가설은 모두 부분채택 되었으며, 다음과 같은 세 가지 결론을 도출하였다. (1) 지방자치단체 복식부기 회계정보시스템을 위하여 개발된 하드웨어 전산시스템은 타 행정업무와 연계가 어려우며, 행정업무의 효율성을 위해서는 연계 가능 시스템의 구축, (2) 지방자치단체 복식부기회계정보시스템을 위하여 개발된 소프트웨어 시스템의 정보는 사용자의 의도대로 제공되지 않고 있으므로, 운영실무 담당자의 능동적인 참여 동기유발, (3) 지방자치단체 복식부기 회계정보시스템 의 서비스 제공자들의 질 높은 전문적 교육과 단순 문제 발생 시 해결을 위한 시스템 사용자들의 교육 확대를 제안한다. Local government double-entry bookkeeping․accrual accounting system will be effected to all over the country from 2007 according to revision of locality finance Act. (Law 7663, 2005. 8.4.) Information system progressed altogether with trail operation of double-entry bookkeepin g․accrual accounting system has to operate adequately. In this time, I wrote this paper because I realized needs of for Local government double-entry bookkeeping accounting information system. For this research, I developed survey questionares to Gangnam-gu & Buchoen city which have been completed establishment about asset and liabilities. For this, I set up research model and hypothesis about having an effect in Local government Double-entry accounting, quality variables (system, information, service) on user s satisfactions, and did empirical test. Research proposal (1) realization of possible connected system within hard-ware computer system for Local government Double-entry Accounting Information System and other government administrative affairs, (2) motivation of positive participation to operator about soft-ware information system developed for Local government Double-entry Accounting Information System and (3) high qualified professional education to service supplier of Local government Double-entry Accounting Information System and educational extension for service user to solve when simple problems were taken place

Design of the Passive Auxiliary Feedwater System in APR+

Jong Cheon,Han-Gon Kim 한국에너지학회 2013 한국에너지공학회 학술발표회 Vol.2013 No.11