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김준관,Sun Jin Yun,Jae Min Lee,Jung Wook Lim 한국물리학회 2010 Current Applied Physics Vol.10 No.3
Gallium-doped zinc oxide (GZO) films were studied using rf-magnetron sputter deposition technique for the use of transparent conducting oxide film. The effects of deposition parameters such as pressure, rfpower,and film thickness on electrical and optical characteristics of GZO films were evaluated to obtain transparent conducting film with high transmittance and low resistivity for a-Si:H thin film solar cells. The resistivity and the structural properties of GZO film strongly depended on rf-power density and film thickness. The 1200 nm-thick GZO film deposited at 15 mTorr and 150 ℃ with rf-power density of 4.46 W/㎠ showed the resistivity as low as 6.2 × 10-4 Ω cm and the average transmittance of 86.5%in visible light wavelength region of 400–800 nm.
원광대학교 치과병원 교정과에 내원한 환자의 분포 및 변동 추이에 관한 연구
김준관,김상철 원광대학교 치의학연구소 1990 圓光齒醫學 Vol.1 No.1
1065 patients (male ; 379, female : 686)who visited at depatment of orthodontics in Wonkwang University Dental Hospital form 1983-09-05 to 1990-10-05, were surveyed and analyzed to study the distribution and the trend of malocclusion patterns. 1. The number of visiting, patients has increased, year by year. And female patients has visited more than males. 2. The percentage of the age group form 8 to 15 was 63.8 : above 20, 14.1% : under 7, 10.1%. 3. The patients lived in Iri, Kun San, lk San, Ok Gu, Kim Je, in that order of frequency. The percentage of patients in above addresses was 92.3. 4. Anterior cross bite showed the highest percentage in chief complaints. 5. Hellman dental age Ⅲ b showed the highest percentage in male : Ⅳ a, in female : Ⅳa, in total. 6. The percentage of skeletodental dysplasia was 64.9: dental dysplasia, 24.9%skeletal dysplasis, 10.1%. 7. The percentage of Class Ⅰ malocclusion was 362% : Class Ⅱ division 1, 25.0% : Class Ⅱ division 2, 2.7% class Ⅲ, 36.1%. 8. The percentage of patients, treated with preventive orthodontics, were 38.0: with comprehensive orthodontics, 62.0%, 43.5% of comprehensive orthodontics cases were extraction cases and 56.5%, non-extraction cases. And 4 first bicuspids have been extracted in the highest percentage.