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노경호,이광진,정용안 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.6
반도체 웨이퍼의 표면 변화에 따른 대체세정제의 세정효율을 측정하기 위하여 ESCA(Electron Spectroscopy for Chemical Analysis)를 이용하여 웨이퍼의 표면을 분석하였다. 농도가 1,000ppm인 4개(Fe, Cu, Ni, Zn)의 표준 용액을 오염물질로 사용하였고, 대체세정제로 APG C_(8-12)와 APG C_14를 사용하였다. ESCA 분석결과 Si, C, O peak가 검출되었으며, 각 오염물질에 대해서 APG C_14가 APG C_(8-12)보다 우수한 세정도를 나타냈다. To measure the cleaning efficiency of alternative cleaning solvents by surface variation of semi-conductive wafer, the experiments were carried out surface analysis of wafer by ESCA(Electron Spectroscopy for Chemical Analysis). Five 1,000 ppm standard solutions(Fe, Cu, Zn, Ni) were used as contaminant materials, and APG C_(8-12) and C_14 were used as alternative cleaning solvents. To result the analysis of ESCA, Si, C and O were detected to major peak and for each contaminant material, APG C_14 was shown better cleaning efficiency than APG C_(8-12).
노경호,정혜란,김수현,최희정,정선주,손희정,한수하,최준용,김상운,김홍빈,김영근 대한의료관련감염관리학회 2020 의료관련감염관리 Vol.25 No.2
Background: The incidence of surgical site infection (SSI) after 20 operative procedures was accessed via a web-based surveillance of the Korean National Healthcare-associated Infections Surveillance (KONIS) system. Methods: A total of 213 hospitals participated in the surveillance system. All operative procedures were prospectively monitored to determine whether SSI could occur in each hospital. All data was collected using a real-time web-based reporting system. Results: From April 2018 through March 2019, SSI surveillance data for 130,345 operative procedures were collected from 213 institutions. SSI occurred in 1.06% of cases. With regard to surgical procedures, SSI rates were 3.16% in colon surgery, 2.26% in rectal surgery, 2.38% in neck surgery, 2.17% in gastric surgery, 1.64% in appendectomy, 0.40% in vaginal hysterectomy, 0.39% in cesarean section, 0.37% in laminectomy, 0.34% in abdominal hysterectomy, 0.33% in cholecystectomy, 0.31% in thoracic surgery, and 0.0% in prostate surgery. Implantrelated SSI rates were 2.67% in ventricular shunt operation, 2.00% in coronary artery bypass graft with both incisions, 1.47% in craniotomy, 1.36% in spinal fusion, 1.12% in cardiac surgery, 1.11% in coronary artery bypass graft with chest only incision, 0.55% in hip prosthesis and 0.29% in knee prosthesis. Conclusion: Between 2014 and 2018, there was an overall decrease in SSI from 1.56% to 1.06%, according to KONIS. Maintaining surveillance of SSI is essential, as it can decrease SSI numbers through feedback to the surgeon and infection control person.
1,1,1 TCE 의 대체 세정제에 대한 세정 성능 비교
정용안,황영한,노경호 ( Yong An Jung,Young Han Hwang,Kyung Ho Row ) 한국공업화학회 1995 공업화학 Vol.6 No.6
Many alternatives to 1,1,1 TCE (1,1,1 trichloroethane) mainly used as cleaning solvent for metal parts are developed and commercialized because the solvent is scheduled to phaseout after 1996. Considering there are many kinds of parts and contaminants in metal cleaning, it is essential to investigating the characteristics and performance of the alternatives prior to use. For the contaminant of a cutting oil, Actrel 1047L and Solena vda which are the commercially available and promising alternatives were experimented at the same cleaning condition of 1,1,1 TCE to check the cleaning performance. The experimental results showed that the removal efficiency of 1,1,1 TCE was the lowest at the dipping cleaning condition, but it was better at the ultrasonic condition. Overally, the removal efficiency of Solena vda was better than that of Actrel 1047L for removing the cutting oil used in this experiment. But the small portion of spot was not entirely cleaned out with Solena vda, and its removal efficiency in terms of the number of experiments was worse than that of Actrel 1047L. Also trichloroethylene which is one of the conventional chlorinated solvents showed the smallest change in the removal efficiency.