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정명화,김은경 동의공업대학 1998 論文集 Vol.24 No.1
The purpose of this study was to investigate the sociological approach to adult education. The sociological approach included social systems and the social actions of sociology. The sociology of social systems included Functionalism and Marxism. These prefer social systems to social actions. They implied "education from above" in adult education. Education from above included development, creativeness. democracy. and participation in the curriculum of adult education. By contrast. a sociology of social action included Symbolic interactionism. Phenomenology, and Ethnomethodology. They preferred social actions to social systems. They suggested social actions to the "education of equals" in adult education. The education of equals in adult education made students learn under contract learning and self-directed learning.
희토류 monoantimonides에서 캐리어들과의 적외흡수 correlation
정명화,이경렬,조은상,권용성 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1
The optical conductivity spectra were obtained in the single crystals LaSb, PrSb, GdSb and DySb at several temperatures. In these materials excepting LaSb, the spectra show Drude's behaviors with the hump due to an anomalous absorption lied at about 0.25eV. For quantitative analysis, we decomposed the spectrum into two parts; the free-electron absorption and the infrared absorption. The sum of the number of the effective electrons due to the Drude absorption and that due to the infrared absorption well agrees with the number of carriers obtained from their band calculations or their dHvAs. Thus, it is concluded that the infrared absorption is due to the transition of carriers.
희토류 monoantimonides에서의 특이한 적외흡수의 온도 의존성
정명화,조은상,권용성 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1
The optical reflectivity spectra were measured on the single crystals LaSb, PrSb, GdSb and DySb at several temperatures. In the spectra of these materials excepting LaSb, the dip due to an anomalous absorption was found at about 0.25eV. The number of the effective electron N_LA taking part in the absorption was evaluated from quantitative analysis. The inverse of N_LA is linear to temperature and the N_LA at each temperature is dependent on square of the effective Bohr magnetron of each rare-earth ion. Therefore, this absorption seems to be due to the scattering between the spin of carriers and the localized magnetic moments at each site of rare-earth ion.
정명화,정성주 한국어병학회 2019 한국어병학회지 Vol.32 No.1
Rock bream iridovirus (RBIV) is a member of the Megalocytivirus genus that causes severe mortality to rock bream (Oplegnathus fasciatus) with characteristic clinical signs of spleen enlargement. In this study, we assessed spleen size and RBIV copy number patterns in RBIV-infected rock bream to determine lethal and safe levels of virus copy number/spleen index that may define disease progress. We found that rock bream infected with RBIV (1.1×107 virus copy number/100 μl) and held at 29, 26, 23 or 20°C exhibited significantly higher levels of spleen size compared to 17°C. In dead condition (100% mortality at 20~29°C), the spleen index (spleen weight / fish weight×100) and virus copy number were 3.00~5.38 and 106~108/μl, respectively. Conversely, in survived condition (0% mortality at 17°C), spleen index and virus copy number was as low as not-infected control (0.34~1.22/100~101/μl, respectively). These findings suggest that spleen index can be an indicator of disease severity of RBIV disease.
CERTAIN SUBGROUPS OF SELF-HOMOTOPY EQUIVALENCES OF THE WEDGE OF TWO MOORE SPACES II.
정명화 한국수학교육학회 2009 純粹 및 應用數學 Vol.16 No.2
In the previous work [5] we have determined the group [수식] for [수식] for all integers q > 1. In this paper, we investigate the group [수식] for all odd numbers q > 1 .
정명화,정엽,정대식,권종원,양중익,민신홍,Chung, Myung-Hwa,Jheong, Yeoub,Jheong, Dae-Sik,Kwon, Jong-Won,Yang, Joong-Ik,Min, Shin-Hong 한국약제학회 1988 Journal of Pharmaceutical Investigation Vol.18 No.1
Physicochemical properties of oil in water microemulsions containing soybean oil and egg phosphatide were observed for 3 weeks under the storage condition of $4^{\circ}C$ refrigerator. Changes in major fatty acid content, particle size distribution, rheogram, acid value and pH value were measured by gas chromatograph, laser particle sizer, Coulter counter and rheometer. From above experiments following conclusions were obtained; 1) Mean particle diameter was shifted from 240 to 266mm. 2) No significant changes were observed in the content of major fatty acids of soybean oil, rheogram, acid value and pH value.
Preparation and Luminescence of Europium-doped Yttrium Oxide Thin Films
정명화,김주한 한국진공학회 2017 Applied Science and Convergence Technology Vol.26 No.2
Thin films of europium-doped yttrium oxide (Y2O3:Eu) were prepared on Si (100) substrates by using a radio frequency (RF) magnetron sputtering. After the deposition, the films were annealed at 1000oC in an air ambient for 1 hour. X-ray diffraction analysis revealed that the Y2O3:Eu films had a polycrystalline cubic α-Y2O3 structure. The as-deposited films showed no photoluminescence (PL), which was due to poor crystalline quality of the films. The crystallinity of the Y2O3:Eu films was significantly improved by annealing. The strong red PL emission was observed from the annealed Y2O3:Eu films and the highest intensity peak was centered at around 613 nm. This emission peak originated from the 5D0→ 7F2 transition of the trivalent Eu ions occupying the C2 sites in the cubic α-Y2O3 lattice. The broad PL excitation band was observed at wavelengths below 280 nm, which was attributed to the charge transfer transition of the trivalent Eu ion.