http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김경자,허동섭,김종석,안병국,서수교,한옥경 한국고무학회 1987 엘라스토머 및 콤포지트 Vol.22 No.1
A coil pyrolyzer and processor-controlled gas chromatograph were used for analysis of rubber for compounding ratio of the single and blend rubber vlucanizates. Variables such as sample size, pyrolysis temperature, time allowed for pyrolysis, the column packing material, its length and programmable temperature for gas chromatography were examined to obtain optimum condition for application to NR, BR and SBR blends. By application fixed conditions, three kinds of standard curves were finally obtained from thirty samples of blend vulcanizates which were prepared in the pilot plant, NIRL It is possible to determine rubber composition and their ratio in NR, BR and SBR products by pyrolysis.
차정옥(J. O. Cha),안정선(J. S. Ahn),이광배(K. B. Lee) 한국진공학회(ASCT) 2010 Applied Science and Convergence Technology Vol.19 No.1
BiFeO₃(BFO)/Pb(Zr0.52Ti0.48)O₃(PZT) bilayer와 multilayer의 다층구조를 만들어 전기적 특성을 측정하여 같은 두께의 BFO 단층박막과 비교해 보았다. BFO와 PZT 용액을 이용하였으며 chemical solution deposition 방법으로 Pt/Ti/SiO₂/Si(100) 기판위에 각 박막을 증착하였다. X-ray diffraction 분석을 통해 모든 박막이 다배향(multi-orientation) 페로브스카이트(perovskite) 구조를 가졌음을 확인하였다. BFO/PZT Bilayer와 multilayer 박막들은 BFO 단층박막의 비해 누설전류 값이 500 ㎸/㎝에서 약 4, 5차수 정도 감소했으며, 이로 인해 BFO/PZT 다층박막의 강유전체 특성이 크게 향상되었다. BFO/PZT multilayer 다층구조 박막의 경우 안정된 이력곡선(hysteresis loop)을 나타냈으며, 잔류 분극(remanent polarization)의 값은 44.3μC/㎠이었으며, 항전계(2Ec) 값은 681.4 ㎸/㎝였다. BiFeO₃/Pb(Zr0.52Ti0.48)O₃(BFO/PZT) multilayer thin films have been prepared on a Pt/Ti/SiO₂/Si(100) substrate by chemical solution deposition. BFO single layer, BFO/PZT bilayer and multilayer thin films were studied for comparison. X-ray diffraction analysis showed that the crystal structure of all films was multi-orientated perovskite phase without amorphous and impurity phase. The leakage current density at 500 ㎸/㎝ was reduced by approximately four and five orders of magnitude by bilayer and multilayer structure films, compared with BFO single layer film. The low leakage current density leads to saturated P-E hysteresis loops of bilayer and multilayer films. In BFO/PZT multlayer film, saturated remanent polarization of 44.3μC/㎠ was obtained at room temperature at 1 ㎑ with the coercive field(2Ec) of 681.4 ㎸/㎝.
차정옥,안정선,이광배,Cha, J.O.,Ahn, J.S.,Lee, K.B. 한국진공학회 2010 Applied Science and Convergence Technology Vol.19 No.1
$BiFeO_3(BFO)/Pb(Zr_{0.52}Ti_{0.48})O_3$(PZT) bilayer와 multilayer의 다층구조를 만들어 전기적 특성을 측정하여 같은 두께의 BFO 단층박막과 비교해 보았다. BFO와 PZT 용액을 이용하였으며 chemical solution deposition 방법으로 Pt/Ti/$SiO_2$/Si(100) 기판위에 각 박막을 증착하였다. X-ray diffraction 분석을 통해 모든 박막이 다배향(multi-orientation) 페로브스카이트 (perovskite) 구조를 가졌음을 확인하였다. BFO/PZT Bilayer와 multilayer 박막들은 BFO 단층박막의 비해 누설전류 값이 500 kV/cm에서 약 4, 5차수 정도 감소했으며, 이로 인해 BFO/PZT 다층박막의 강유전체 특성이 크게 향상되었다. BFO/PZT multilayer 다층구조 박막의 경우 안정된 이력곡선(hysteresis loop)을 나타냈으며, 잔류 분극(remanent polarization)의 값은 $44.3{\mu}C/cm^2$이었으며, 항전계($2E_c$) 값은 681.4 kV/cm였다. $BiFeO_3/Pb(Zr_{0.52}Ti_{0.48})O_3$(BFO/PZT) multilayer thin films have been prepared on a Pt/Ti/$SiO_2$/Si(100) substrate by chemical solution deposition. BFO single layer, BFO/PZT bilayer and multilayer thin films were studied for comparison. X-ray diffraction analysis showed that the crystal structure of all films was multi-orientated perovskite phase without amorphous and impurity phase. The leakage current density at 500 kV/cm was reduced by approximately four and five orders of magnitude by bilayer and multilayer structure films, compared with BFO single layer film. The low leakage current density leads to saturated P-E hysteresis loops of bilayer and multilayer films. In BFO/PZT multlayer film, saturated remanent polarization of $44.3{\mu}C/cm^2$ was obtained at room temperature at 1 kHz with the coercive field($2E_c$) of 681.4 kV/cm.
Scalable CGeSbTe-based phase change memory devices employing U-shaped cells
Park, J.H.,Kim, J.H.,Ko, D.-H.,Wu, Z.,Ahn, D.H.,Park, S.O.,Hwang, K.H. Elsevier S.A. 2017 Thin Solid Films Vol.634 No.-
<P><B>Abstract</B></P> <P>Phase change memory (PCM) that is operated on resistance changes caused by joule heating has been suggested as the next-generation memory for scaling since its programming current scales linearly. We propose a U-shaped cell design to further reduce the reset current in PCM devices, which enables easier and more efficient scaling than conventional PCMs. Simulation studies of heat transfer demonstrated that our U-shaped design with a dashed heater has a higher thermal efficiency of 4.97K/μA compared to 3.36K/μA in a lance cell with a ring heater for the same storage node. The reset current can be better scaled proportionate to k<SUP>2.0</SUP> in which the exponent is higher than the lance cell of k<SUP>1.5</SUP> in non-isotropic scaling. This better scalability is attributed to the small programming volume of the U-shaped cell, which was verified by transmission electron microscopy analysis. Furthermore, the cyclic endurance of the U-shaped cell was enhanced by 1 order of magnitude compared to a lance cell and the thinner CGeSbTe films reduced the reset current further. Our results show that a U-shaped cell is a highly promising design to scale reset current in next-generation PCM devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> U-shaped cell is a promising cell design to scale phase change memory. </LI> <LI> U-shaped cell with dashed heater is more thermally efficient than lance cell with ring heater. </LI> <LI> Thinner CGeSbTe layer can reduce the reset current further. </LI> </UL> </P>
진용옥,안광선 광운대학교 1977 論文集 Vol.6 No.-
This paper is described about processing of random telegraphy signals and auto receiving system without human action. In this system, an auto telegraphy receiving system consist of below block diagram and we are explained a method for statistical analysis (Estimater) In Data processing system, first, we assumed that random telegraphy signal are provided into digitized number, for example, A(·―)=111000111111111 will change into 10111, then this data number campare with previous memory data 10111 by this result, will print a A. By computer processes, we confirm that this method are right. We also think, filter and estimater for statistical signal analysis stage must stuty more detail, sampling device and morse/TTY code comerter are also same.
충수염의 염증부위, 염증정도 및 부위별 병리조직학적 소견과 기생충과의 관계
김정란,안영옥,오은석,최금숙,최윤주 이화여자대학교 의과대학 1977 梨花醫學誌 Vol.- No.9
An examination 36 ectomized appendices based on pathohistologic studies in regard to the location and degree of inflammation as well as the relation to parasites has been made. The results were obtained as follows 1) location of inflammation is highest incidence on middle portion. 2) Degree of inflammation revealed 36.1% in severe, 27.8% in moderate, 29.6% in mild, 6.5% in intact. 3) Pathohistologic studies of appendicitis revealed 58.3% in Catarrh, 9.2% in ulceration, 27.8% in obstruction, 3.8% in intact, and obstruction on middle portion was characteristic. 4) Detection rate of ova in 36 appendices were Trichocephalus trichiurus(41.7%), Ascaris lumbricoides (5.5%), and Enterbius vermicularis(2.8%), Findings of adult worms in 36 appendices were 2 cases of Enterobius vermicularis. 5) In 18 appendices which were detected ova of parasites, inflammation took a 94.4% and degree of inflammation were 29.4% in mild, 29.4% in moderate, 41.2% in severe.