요양급여적정성 평가자료를 이용한 예방적 항생제 사용과 수술부위 감염 발생의 관련성 연구

김경훈,박춘선,장진희,김남순,이진서,최보람,이병란,이규덕,김선민,염선아,Kim, Kyoung-Hoon,Park, Choon-Seon,Chang, Jin-Hee,Kim, Nam-Soon,Lee, Jin-Seo,Choi, Bo-Ram,Lee, Byung-Ran,Lee, Kyoo-Duck,Kim, Sun-Min,Yeom, Seon-A 대한예방의학회 2010 예방의학회지 Vol.43 No.3

Objectives: To examine the prophylactic antibiotic use in reducing surgical site infection. Methods: This was a retrospective study for patients aged 18 years and older who underwent gastrectomy, cholecystectomy, colectomy, cesarean section and hysterectomy. The data source was quality assessment data of the Health Insurance Review & Assessment Service gathered from medical records of 302 national hospitals. Prophylactic antibiotic use was defined as: timely antibiotic administration or inappropriate antibiotic selection. We performed hierarchical logistic regression to examine the association between prophylactic antibiotic use and surgical site infection with adjustment for covariates. Results: The study population consisted of 16 348 patients (1588 gastrectomies, 2327 cholecystectomies, 1,384 colectomies, 3977 hysterectomies and 7072 cesarean sections) and surgical site infection was identified in 351 (2.1%) patients. The rates of timely antibiotic administration and inappropriate antibiotic selection varied according to procedures. Cholecystectomy patients who received timely prophylactic antibiotic had a significantly reduced risk of surgical site infection compared with those who did not receive a timely prophylactic antibiotics (OR 0.64, 95% CI=0.50-0.83), but no significant reduction was observed for other procedures. When inappropriate prophylactic antibiotics were given, the risk of surgical site infection significantly increased: 8.26-fold (95% CI=4.34-15.7) for gastrectomy, 4.73-fold (95% CI=2.09-10.7) for colectomy, 2.34-fold (95% CI=1.14-4.80) for cesarean section, 4.03-fold (95% CI=1.93-8.42) for hysterectomy. Conclusions: This study examines the association among timely antibiotic administration, inappropriate antibiotic selection and surgical site infection. Patients who received timely and appropriate antibiotics had a decreased risk of surgical site infection. Efforts to improve the timing of antibiotic administration and use of appropriate antibiotic are needed to lower the risk of surgical site infection.

신뢰도를 요구하는 임베디드 시스템에서의 저전력 태스크 스케쥴링

김경훈,김유나,김종,Kim, Kyong Hoon,Kim, Yuna,Kim, Jong 대한임베디드공학회 2008 대한임베디드공학회논문지 Vol.3 No.1

In this paper, we provide an adaptive power-aware checkpointing scheme for fixed priority-based DVS scheduling in dependable real-time systems. In the provided scheme, we analyze the minimum number of tolerable faults of a task and the optimal checkpointing interval in order to meet the deadline and guarantee its specified reliability. The energy-efficient voltage level at a fault arrival is also analyzed and used in the recovery of the faulty task.

Sol-Gel 법을 이용한 칼슘-알루미네이트계 전자화물 박막의 제조와 특성

김경훈,박주석,채재홍,서원선,소성민,김태관,김형순,이병하,Kim, K.H.,Park, J.S.,Chae, J.H.,Seo, W.S.,So, S.M.,Kim, T.K.,Kim, H.S.,Lee, B.H. 한국결정성장학회 2010 한국결정성장학회지 Vol.20 No.6

Sol-gel법을 적용하여 $12CaO{\cdot}7Al_2O_3$(C12A7) 전자화물 박막을 제조하기 위해 CaO-$Al_2O_3$ sol을 제조하여 dip 코팅법을 적용하여 quartz 기판에 박막을 형성하였으며 열처리를 통해 C12A7의 박막을 제조하였다. C12A7 상의 형성 $800^{\circ}C$에서 시작되었고 $1,200^{\circ}C$ 온도에서 1시간 열처리를 통해 치밀화된 박막을 제조할 수 있었다. 제조된 C12A7 박막은 부도체였지만 수소 환원 분위기 열처리를 통해 전기전도도를 나타내기 시작했으며 $1,200^{\circ}C$ 48시간 열처리 시 120 S/cm의 전기전도도를 나타내었다. The Calcium-aluminate electride thin films on the quartz substrates was coated by sol-gel process. The crystallization of the C12A7 thin film was observed at $800^{\circ}C$ and high density C12A7 thin film was achieved on heat treatment at $1,200^{\circ}C$ for 1 hour. The reduction heat treatment of C12A7 thin film could be converted from insulator to conductor and the electrical conductivity was 120 S/cm in the C12A7 thin film heat treated at $1,200^{\circ}C$ with $H_2$ gas for 48 hours.

IR Activities and Relationship Marketing

김경훈,박기홍,김동율,Kim, Kyung-Hoon,Park, Kee-Hong,Kim, Dong-Yul Korean Academy of Marketing Science 2003 마케팅과학연구 Vol.11 No.-

The purpose of this study was to examine the relationship between IR(investor Relations) activities and relationship marketing toward shareholders. This study constructed a research model delineating relationships between IR activities and relationship marketing variables based upon literature review and extensive interviews with IR experts. LISREL analysis upon empirical data was conducted. IR activities were found to be key determinants of Trust and Commitment of investors. Trust and Commitment were found to be positively related to firms' performance. Thus, IR activities had positive effects on a company's relationship marketing and performance.

도시열섬 완화를 위한 나무심기운동에 따른 지표면 온도 변화 분석 - 구미시를 사례로 -

김경훈,김형수,권용하,박인선,정윤재,KIM, Kyunghun,KIM, Hung Soo,KWON, Yong-Ha,PARK, Insun,CHOUNG, Yun-Jae 한국지리정보학회 2022 한국지리정보학회지 Vol.25 No.1

Due to climate change, temperature is rising worldwide. Since rapid growth has been achieved focused on cities, South Korea is experiencing serious environmental problems such as heat island and air pollution in urban areas. To solve this problem, the central and each local government are actively promoting tree planting campaigns. This study quantitatively calculated changes in green areas and vegetation of Gumi by the tree planting campaign, and analyzed the temperature changes accordingly. For the target area, the green area, vegetation index, and ground temperature were calculated for 4 different time periods using the given Landsat satellite images. As a result of the study, the green area of was increased by 7.24km² and 4.93km² for two regions, respectively. Accordingly, the vegetation index increased by 0.14 to 0.16, and the temperature decreased by 0.8 to 1.2℃. The Tree planting campaign not only plays a role in lowering the temperature of the city but also does various roles such as air purification, carbon absorption, and providing green rest areas to citizens. Therefore the campaign should be carried out continuously.

가설비계 설치작업의 재해요인 및 개선방안

김경훈,부윤섭,Kim, Gyeong-Hun,Bu, Yun-Seop 한국건설관리학회 2019 한국건설관리학회 논문집 Vol.20 No.6

한국의 도로분야 기술수준 분석에 관한 연구

김경훈,이두헌,Kim, Kyong-Hoon,Lee, Du-Heon 한국건설관리학회 2015 한국건설관리학회 논문집 Vol.16 No.4

In this study, the road construction field of high impact in the construction industry were selected, and the analysis of the detailed technology level was carried out. and we derived the main fields for future overseas. As results, the technology level of road facilities in korea was high about road operations and management sector, while it was relatively row about road pavements. And this study, we analyzed the economic, social and technological priority, and derived main fields to have the high investment efficiency. A derived items are found to be "maintenance-free Modular Road Pavements" and "Cities temperature reduction-type road". 본 연구에서는 건설산업에 있어서 파급효과가 높은 도로시설물을 선정하여, 세부적인 기술수준 분석을 실시하고, 향후 해외 진출을 위한 중점추진분야를 도출하였다. 분석결과, 한국의 도로시설물에 대한 기술수준은 도로 운영 및 관리기술 부문에 대한 기술수준이 높은 반면, 도로포장기술 부문은 상대적으로 낮은 기술수준을 보유한 것으로 나타났다. 그리고 본 연구에서는 경제적, 사회적, 기술적 중요도를 분석하여 투자효율이 높을 것으로 판단되는 중점 추진 분야를 도출하였으며, 도출된 항목으로는 "무보수 모듈러 도로포장 기술"과 "도시 온도저감형 도로 기술"로 나타났다.

Methanol washing effects on spark plasma sintering behavior and mechanical properties of B4C ceramics

김경훈,Jae Hong Chae,Joo Seok Park,Dae Keun Kim,심광보,이병하 한양대학교 세라믹연구소 2007 Journal of Ceramic Processing Research Vol.8 No.4

B4C ceramics were fabricated by a spark plasma sintering process and their sintering behavior, microstructure and mechanical properties were evaluated. The relative densities of B4C ceramics obtained by spark plasma sintering method reached were as high as a 99% at lower temperature than used in the conventional sintering method, in addition, without any sintering additives. The mechanical properties of B4C ceramics were improved by a methanol washing process which can remove B2O3 coatings from the B4C powder surface. This improvement results from the formation of a fine and homogeneous microstructure because the grain coarsening was suppressed by the elimination of the B2O3 coating. In particular, the fracture toughness of the sintered specimen using a methanol washed powder improved by more than 30% compared with the specimen using an as-received commercial powder. B4C ceramics were fabricated by a spark plasma sintering process and their sintering behavior, microstructure and mechanical properties were evaluated. The relative densities of B4C ceramics obtained by spark plasma sintering method reached were as high as a 99% at lower temperature than used in the conventional sintering method, in addition, without any sintering additives. The mechanical properties of B4C ceramics were improved by a methanol washing process which can remove B2O3 coatings from the B4C powder surface. This improvement results from the formation of a fine and homogeneous microstructure because the grain coarsening was suppressed by the elimination of the B2O3 coating. In particular, the fracture toughness of the sintered specimen using a methanol washed powder improved by more than 30% compared with the specimen using an as-received commercial powder.

건설공사 사후평가시스템 입력오류 분석에 관한 연구

김경훈,이두헌,김태영,Kim, Kyong-Hoon,Lee, Du-Heon,Kim, Tae-Yeong 한국건설관리학회 2015 건설관리 : 한국건설관리학회 학회지 Vol.16 No.2

현재 건설공사 사후평가시스템 입력과정에서 자료가 오류 및 누락이 발생되는 경우가 많아 데이터의 신뢰성이 떨어지는 경우가 많다. 이에 따라 본 연구에서는 사후평가 결과분석의 신뢰성 확보를 위해 건설공사 사후평가시스템의 입력누락 및 입력오류에 대한 세부적인 분석을 실시하였다. 분석결과, 건설사업 초기 단계일수록 자료의 미입력된 자료의 비중이 높게 나타났다. 그리고 분석된 등록오류로는 참고자료의 부정확, "원" 단위 오류, 입력항목에 대한 이해부족 등으로 나타났다. The data are often missed and many errors of the data are generated in the input process for the post evaluation system on the construction projects, and the reliability of the data falls down much. Accordingly, the detailed analysis about missing and error of data was conducted to ensure reliability of the analysis results about post evaluation on the construction projects. As results in this study, a lot of input data were missed at the initial construction phase, and the data errors were found in the inaccuracy of reference reports, the lack of understanding about input data, and the failure of KRW unit.

키네시오 테이핑을 병행한 하프 스쿼트 훈련이 일반인의 몸통과 다리 근활성도 및 균형능력에 미치는 영향

김경훈,Kim, Kyung-Hun 대한고유수용성신경근촉진법학회 2022 PNF and Movement Vol.20 No.2

Purpose: The aim of this study was to identify the effects of performing the half squat exercise with Kinesio taping (HSEKT) on trunk and lower extremity muscle activity and balance ability in general university students. Methods: The 32 participants were randomly assigned to either the HSEKT group (half squats with Kinesio taping) or the control group (half squats with sham Kinesio taping). Both groups performed half squats with either Kinesio taping (HSEKT group) or sham Kinesio taping (control group) for 30 min/day, 3 times/week for 6 weeks. The Noraxon mini direct transmission system (DTS) electromyography (EMG) system was used to evaluate trunk and lower extremity muscle activity. BioRescue equipment was used to measure the movement area of the center of pressure with eyes open and eyes closed. The muscle activity of the trunk and lower extremities and the balance ability of all participants were measured before and after the intervention. An independent t-test was used to statistically analyze the pre- and post-intervention EMG and balance ability results. Results: The trunk and lower extremity muscle activity was found to have significantly improved in the HSEKT group and the control group after the intervention (p < 0.05). Also, the balance ability of the HSEKT group differed significantly after 6 weeks of training compared to that of the control group (p < 0.05). Conclusion: The findings of this study show that performing half squats with Kinesio taping had a positive effect on trunk and lower extremity muscle activity and balance ability in general university students.