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齒牙硬組織에 있어 Chloranilic acid에 依한 Calcium의 組織化學的 觀察
朴聖浩 최신의학사 1969 最新醫學 Vol.12 No.4
This reports in dental tissue (tooth germ and dental hard tissue) were made using a method of chloranilic acid. The results were found to give satisfactory results with the test tissues.
치환된 다결정성 LiRbSO₄계의 상안정성 및 이온전도성
박성호 전주대학교 자연과학종합연구소 1997 전주대학교 자연과학연구소 학술논문집 Vol.10 No.2
The LiRbSO_4 Systems were synthesized by the different kinds of Ba doping methods. All kind of synthesized systems have many compounds which are identified as LiRbSO_4 doped with Ba, Rb_2SO_4, Li_2SO_4, etc. From this, it can be found that synthesized specimens from composites and X-ray results reveal that Li_1.0Rb_0.9(SO_4)_(1+0.05) system has orthorombic structure whose lattice parameter, ao and co are increased by the doping of Ba^2+ site. The room temperature conductivity of Li_1.0Rb_0.9(SO)_(1+0.5) was increased by one order of magnitude higher than that of pure LiRbSO_4 and this system has one resistance factor and one capacity factor which are considered as bulk properties.
Monte Carlo Method에 의한 GaAs의 Hydrodynamic Model Parameter의 추출
박성호,한백형,Park, Seong-Ho,Han, Baik-Hyung 대한전자공학회 1990 전자공학회논문지 Vol. No.
Hydrodynamic model에 의해서 submicron GaAs device를 simulation 할 때 필요한 hydrodynamic model parameter 들을 Monte Carlo code를 개발하여 추출하였다. GaAs 전도대의 밴드구조로 $\Gamma$, L, X세개의 valley를 고려하였고, 산란기구로는 polar optic phonon, acoustic phonon, equivalent intervalley, non-equivalent intervalley, ionized impurity 및 piezoelectric scattering을 고려하였다. 계산으로부터 얻은 속도 - 전계 곡선은 실험결과와 잘 일치하였고, 다른 연구자들이 소자 시뮬레이션에 사용할 수 있도록 모델 파라메터들을 표로 제시하였다. The hydrodynamic model parameters for the submicron GaAs simulation are calculated using the Monte Carlo method. $\Gamma$, L-, and X-valleys are included in the conduction band of GaAs, and polar optic phonon, acoustic phonon, equivalent intervalley, non-equivalent intervalley, ionized impurity, and piezoelectric scattering are taken into account. The velocity-electric field strength curve obtained in this paper is in good agreement with experimental one. We present the results in tabular form so that other participants can make use of them to simulate the submicron GaAs devices by the hydrodynamic model.
박성호 전주대학교 자연과학종합연구소 1997 전주대학교 자연과학연구소 학술논문집 Vol.10 No.2
Lithium Potassium Sulfate crystals have hexagonal symmetry and they belong to the space group P6_3. There is no information about ionic conductivity of Ba-doped LiKSO_4 therefore, Ba-doped LiKSO_4 systems investigated ionic conductivity and examined conduction mechanism. Stabilized systems of Ba-doped LiKSO_4 was obtained sintering time of 48 hours and sintering temperature of 600℃. The power crystal structure were investigated by the X-ray power diffractometer(XDR). XDR pattern analysis results showed that lattice parameters, a_0 and c_0 are decreased due to the substitution of Ba^2+. Ba^2+ion was substituted K^+ ion site with the consequence that lattice parameters are decreased by the ion size effect. Occurrences of the phase transition was identified by TG-DTA patterns and the morphology of the systems was examined by SEM. TG-DTA analyses, reveal that known phase transition temperature is lower. From SEM analyses, it could be confirmed that these synthesized systems consisted of hexagonal and orthorhombic structure. The ionic conductivity of these systems is investigated by frequency variable a.c. method at the temperature region of 25℃ to 600℃ under the Nitrogen gas and gold are deposited onto the specimens in order to use as an inert electrode.