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채원석,장예석,이범규,김강진,Chae, Won Seok,Jang, Yeah Suk,Lee, Beom Gyu,Kim, Kang Jin 대한화학회 1995 대한화학회지 Vol.39 No.4
빛에 대한 폴리피롤(PPy)의 광전기화학적인 거동을 $Fe(CN)_6^{4-}/Fe(CN)_6^{3-}$과 $I^-/I_2$를 산화환원종으로 수용액에서 관찰하였다. PPy은 정전압법으로 Pt와 glassy-C 그리고 ITO에 각각 중합하였으며 PPy막을 입힌 전극에 빛이 쪼여졌을 때 산화환원종의 산화환원 전위에서 전류의 증가를 얻었다. 증가된 전류는 PPy이 갖는 반도체 특성과 빛에 의한 전극표면에서의 산화환원 광열촉진에 기인하며, PPy 중합시 사용한 지지전해질의 음이온(dopants)과 산화환원종, 용액의 pH에 의존하였다. The photoelectrochemical behavior of polypyrrole films on Pt, glassy-C and indium tin oxide(ITO) under illumination was studied in aqueous solution containing a redox couple such as I-/I2 or Fe(CN)64-/Fe(CN)63-. Polypyrrole(PPy) was coated on Pt, glassy-C and ITO electrodes using electrochemical polymerization of pyrrole by potentiostatic method. Illumination of the PPy film results in the increase of cathodic and anodic currents at redox potentials of the redox species. These enhanced currents are caused both by the semiconductor characteristics of PPy and by the photothermal acceleration of redox reaction at PPy-electrode surface, and are dependent on the pH of redox solutions and the dopants in PPy.
노인에게서 대퇴골 고관절 치환술시 마취관리 : 증례보고 A case report
채원석 순천향의학연구소 2004 Journal of Soonchunhyang Medical Science Vol.10 No.2
An Ninety-year old female patient was transferred to the operating room for hip arthroplasty under regional anesthesia. Pulmonary (unction studies revealed severe restrictive pattern, and cardiomegaly noted in her chest X-ray examination. For the prevention of hypothermia, we first prepared blanketrol and IV line warmer and attempted epidural anesthesia, but we failed. We then did spinal anesthesia which was successfully administered. After performing regional anesthesia and injection of methylmethacrylate bone cement into the intramedullary canal, blood pressure and pulse was stable and no other evidence of instability. In the recovery room, she did not show any other symtoms, and three weeks later, she was discharged hospital without any sequelaes.
채원석,박찬우,최완,안세영,노병석,이준우,Chae, W.S.,Park, C.W.,Choi, W.,Ahn, S.Y.,Roh, B.S.,Lee, J.W. 한국전자통신연구원 2012 전자통신동향분석 Vol.27 No.3
애플과 구글이 주도한 모바일 앱 장터에 새로운 변화가 찾아올 것으로 예상된다. HTML5(HyperText Mark-up Language 5)로 무장한 모바일 웹 앱의 등장은 모바일 인터넷 환경의 비약적인 발전과 고사양의 스마트기기 보급 확대에 힘입어 모바일 앱의 생태계를 재구성하고 있다. 본고에서는 애플리케이션 플랫폼의 발달 과정과 모바일 웹 환경에서의 HTML5의 역할에 대해서 알아보고 모바일 웹 프레임워크에 대해 정리하였다.
채원석 대진대학교 첨단소재연구소 1999 첨단소재연구소논문집 Vol.2 No.-
Porous silicon, electrochemically etched in HF solution, exhibits a unique properties including great potential for use as a light emitter as well as being suited to incorporation into biological systems. This application leads to the types of silicon known as 'light emitting silicon' and 'biosilicon'. The processes and techniques leading to the fabrication of these materials are closely related. Visible electroluminescence from the cathodically biased porous silicon electrode in electrolyte solution containing persulfate ions(S2O82-) exhibits a blue shift with increasing applied potential. The blue shift can be attributed to the formation of accumulation layer and to the Fermi level pinning in the porous silicon. However, the formation, luminescence, or reaction mechanism and electrochemical properties of porous silicon were still not completely understood in every detail. Although the surface of porous silicon layer was covered with hydrogen produced in as etchant, its hydrophobic property exhibited a abnormal current-decay curves under constant potential.
실습전 옥산호 주기관에 저질 연료유 사용에 대한 고찰 (1)
채원석 군산대학교 1969 群山水産專門大學 硏究報告 Vol.3 No.2
As the most suitable quality Bunker-A (JIS K-2205) has closely approximation for the main diesel engine (6MA-HTY) in the training, Og-San. But it is so expensive for daily use that we can find the poor economy. Here we cannot too strongly advise the necessity of any substitution. The author has got how to make use of the Light Residual Fuel Oil which is lower both in quality and price than Bunker-A mentioned above. For the useful management, two heater tanks and one oil purifier which are the minimum increase are fitted to the existing facilities in the engine room of Og-San.
채원석,송상우,김상현,조성환 순천향대학교 2006 Journal of Soonchunhyang Medical Science Vol.12 No.1
Postoperative delirium is defined as an acute change with cognitive status characterized by fluctuating consciousness and unattention occuring within 30 days after operation, Postoperative delirium is a common complication of surgery in elderly people, but have been often unrecognized, under-diagnosed, under-treated, and under-investigated. We present a case of postoperative delirium in adult woman patient after spine surgery who did not have any problem in preoperative evaluation.
채원석 대진대학교 2001 大眞論叢 Vol.9 No.-
It is possible that electrochemical reduction changes of Eu(Ⅲ) are observed by fluorescence spectroelectrochemical methods. Eu(Ⅲ) is electrochemically reduced at cathodic potential in the in the mixture of 5.0 x 10^(-3) M Eu(Ⅲ) and 0.1 M sodium benzoate containing 0.1 M LiClO₄ as supporting electrolyte on a pt or PIGE(Paraffin Impregnated Graphite Electrode). Sodium benzoate was used as energy donor because of small absorption cross section of Eu(Ⅲ). The Eu-complex formed by Eu(Ⅲ) and benzoate exhibits the hypersensitive peak at 618 nm corresponding to the _(5)D^(0)→_(7)F² transition. Under the of reduction potential of Eu(Ⅲ), the hypersensitive emission peak gradually decreases and a new and large absorption peak regarded as the 4f→5d transition of Eu(Ⅱ) appears at 248 nm and 328 nm. This is considered that the new absorption peak possessing large molar absorption coefficient can be used for the analysis of Eu(Ⅲ).
전도성 폴리피롤과 아크릴로니트릴-부타디엔 복합체에서의 전하이동 향상에 관한 연구
채원석 대진대학교 첨단소재연구소 2000 첨단소재연구소논문집 Vol.3 No.-
The charge transfer rate in polypyrrole(PPy) electropolymerized within poly(acrylonitrile-co-butadiene)(PAB) was compared with that in PPy deposited Pt electrodes by using cyclic voltammetry, chronoamperometry, and chronopotentiometry in acetonitrile. For both electrodes anodic and cathodic peak currents were proportional to scan rates below 100 mV/sec, but to square root of scan rates beyond 200 mV/sec. The apparent diffusion coefficient of ClO4- in the PPy/PAB composite is estimated to be 1.6 times larger than that in PPy. The PPy films composited within PAB layer showed higher anodic and cathodic currents and possessed faster charging-discharging process and larger capacity.