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Layer-by-Layer Doping of Few-Layer Graphene Film
Gü,neş,, Fethullah,Shin, Hyeon-Jin,Biswas, Chandan,Han, Gang Hee,Kim, Eun Sung,Chae, Seung Jin,Choi, Jae-Young,Lee, Young Hee American Chemical Society 2010 ACS NANO Vol.4 No.8
<P>We propose a new method of layer-by-layer (LbL) doping of thin graphene films. Large area monolayer graphene was synthesized on Cu foil by using the chemical vapor deposition method. Each layer was transferred on a polyethylene terephthalate substrate followed by a salt-solution casting, where the whole process was repeated several times to get LbL-doped thin layers. With this method, sheet resistance was significantly decreased up to ∼80% with little sacrifice in transmittance. Unlike samples fabricated by topmost layer doping, our sample shows better environmental stability due to the presence of dominant neutral Au atoms on the surface which was confirmed by angle-resolved X-ray photoelectron spectroscopy. The sheet resistance of the LbL-doped four-layer graphene (11 × 11 cm<SUP>2</SUP>) was 54 Ω/sq at 85% transmittance, which meets the technical target for industrial applications.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2010/ancac3.2010.4.issue-8/nn1008808/production/images/medium/nn-2010-008808_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn1008808'>ACS Electronic Supporting Info</A></P>
서순림,이은남,박송자,양영희,이동숙,최은옥,구미옥,김인자,이인숙,김성재,박영임,이은옥 서울대학교 간호대학 간호과학연구소 1997 간호학 논문집 Vol.11 No.1
Today human needs for health promotion and maintenance are increasing. The nursing progression has a great responsibility for helping clients to practice good health behavior. self efficacy was found to be potent predictor in initiating and maintaining the health-related behavior. Therefore, the concept is important in nursig intervention for change of health behavior. The purpose of this paper was to analyze and clarify the meaning of the concept, self efficacy. This study used Walder & Avant's process of concept analysis. Critical attributes of self efficacy were : 1) positive perception of his won capability; 2) intrapersonal strength; 3) possibility of being learned; 4) individuality; 5) specificity; 6) generalizability. Antecedents of self efficacy consist of those facts that 1) new situation occurs; 2) individuals have needs to change the new situation; 3) there are some required actions in new situation. Consequences occurring as a result of self efficacy consist of those facts that 1) individual initiates the of failure; 5) cope with the situation; 6) controls the situation; 7) the level of self efficacy is enhanced; 8) the level of self-esteem is enhanced.
구자균,이은석 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(계획계)
Recently, economical withering and environmental pollutions are appearing in the mine area in Taeba다 뭉 jungsun because over 300 coal mines have been closed. We have to consider the coal mine industries as cultural things and improve them through preservation, proper development, recovery of nature and giving them new functions. Therefore, in this study, I suggest the new coal museum, which is connected to existing coal mine industries architecturally, and make the active space, which is able to solve the problems above. In addition, through harmony of things to preserve, recording of history, education about underground resources and connecting to tourist resort such as casino, the museum take an important role as a cultural space and we can expect new functions and values of closed mine area, which is causing environmental and civil problems.
동심원관 제트유동장내에서 초음파에 의한 난류증진에 관한 연구
구자훈,박영호,이상범,주은선 경상대학교 생산기술연구소 2000 生産技術硏究所論文集 Vol.16 No.-
A study on the turbulence enhancement by ultrasonic vibration was dealt with an experiment on flow characteristics with ultrasonic forcing in a jet field of coaxialcircular pipe. A large transparent acryl tank and a coaxial circular pipe nozzle were made for the above research. Experimental data have been obtained using PIV. City water of 25℃ was selected as an experimental liquid and the front flow field of the coaxial circular pipe was divided horizontally as 3 measuring regions to observe characteristics of flow phenomena. Characteristics of fluid flow such as velocity vector distribution, kinetic energy, turbulent intensity and etc. were visualized, observed, examined and considered at 3 kinds of Re No. such as Re=2×10³, 3×10³ and 5×10³. In result, it was proved that ultrasonic vibration affected the enhancement of turbulent flow.
횡문근융해증과 경한 신손상을 동반한 급성 A형 간염 1예
조규민,김창욱,성현진,허준,전부석,이종환,심은희,이석종,이창돈 영남대학교 의과대학 2012 Yeungnam University Journal of Medicine Vol.29 No.1
A 48-year-old male visited the emergency room of the authors’ hospital due to nausea, vomiting, and myalgia for four days. Acute hepatitis A was identified from the serologic marker of the hepatitis A virus. Mild elevation of the serum creatinine and creatinine phosphokinase(CPK) suggested rhabomyolysis, which was confirmed with the serum aldolase, myoglobin, and urine myoglobin. With supportive care, both the liver and renal func- tions were recovered gradually and fully. This case shows that rhabdomyolysis can be one of the mechanisms of renal complication in cases of acute symptomatic hepatitis A.
주개 이온을 첨가한 강유전체 Bi₄Ti₃O_12(BIT) 박막의 특성
최은경,박문흠,김두회,구영건,김상수 昌原大學校 基礎科學硏究所 2001 基礎科學硏究所論文集 Vol.13 No.-
Bismuth layered structure ferroelectric thin films, BIT and donor (V, Nb and W) doped BIT, were prepared on the Pt/Ti/SiO2/Si substrates by sol-gel method. BIT film was characterized by strong c-axis prepared orientation. In the case of donor doped BIT thin films, the degree of c-axis prepared orientation decreased systematically V-BIT→W-BIT→Nb-BIT and Nb-BIT film was shown random orientation. Surface morphologies of BIT and V-BIT films had a plate-like and Nb-BIT and W-BIT had a mixture of plate-like and rod-like. In the results of ferroelectric hysteresis loops, the remanent polarization (2Pr) of random-oriented Nb-BIT capacitor was 26 μC/cm2, and this value was over two times higher than that of 12 μC/cm2 for BIT capacitor. The polarization fatigue up to 4.5×1010 read/write switching cycles of W-BIT capacitor was shown superior to the other capacitors. The polarization of the W-BIT capacitor decreased only 10% of the initial value after 4.5×1010 switching cycles.
여은구,조선형,이용신 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.4
Formability in deep drawing process depends not only on a drawability of workpiece material but also on process conditions such as die punch corner radius, lubricant conditions, punch-die clearance etc. For instance, bending resistance should be reduced by increasing die round appropriately, drawing load should be minimized by improving the lubricant condition between die and material, and blanking load should be increased by selecting a pertinent punch round and by augmenting the friction resistance in punch. In this study, a multi-stage deep drawing process is analyzed using ABAQUS. The effects of formability factors, such as die shoulder radius, punch-die clearance and coefficient, are investigated, and the results are also discussed in detail.