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송류화분(松類花粉)의 아미노산 조성 및 화분발아(花粉發芽)에 따른 그 조성의 변화
홍성옥 한국임학회 1967 한국산림과학회지 Vol.6 No.1
In the present experiment the amino acid composition in the pollen of Pinus taeda and Pinus rigida and methbolic changes of the composition occurring in germinating pollen were examined by the method of paper chromatography. The results obtained in this study are as follows. 1. The mature pollen of Pinus taeda and Pinus rigida contained 12.00%, 13.19% crude protein respectively and sixteen protein-constituting amino acids and three unknowns were detected on the chromatogram. 2. Main components of the protein-constituting amino acids were leucines, valine, alanine, glutamic acid and aspartic acid. 3. The free amino acids such as leucines, valine, tyrosine, alanine and glutamic acid increased evidently during germination of the pine pollen.
Power density of various light curing units through resin inlays with modified layer thickness
홍성옥,오용희,민정범,김진우,이빛나,황윤찬,황인남,오원만,장훈상 대한치과보존학회 2012 Restorative Dentistry & Endodontics Vol.37 No.3
Objectives: The purpose of this study was to enhance curing light penetration through resin inlays by modifying the thicknesses of the dentin, enamel, and translucent layers. Materials and Methods: To investigate the layer dominantly affecting the power density of light curing units, resin wafers of each layer with 0.5 mm thickness were prepared and power density through resin wafers was measured with a dental radiometer (Cure Rite, Kerr). The dentin layer, which had the dominant effect on power density reduction, was decreased in thickness from 0.5 to 0.1 mm while thickness of the enamel layer was kept unchanged at 0.5 mm and thickness of the translucent layer was increased from 0.5 to 0.9 mm and vice versa, in order to maintain the total thickness of 1.5 mm of the resin inlay. Power density of various light curing units through resin inlays was measured. Results: Power density measured through 0.5 mm resin wafers decreased more significantly with the dentin layer than with the enamel and translucent layers (p < 0.05). Power density through 1.5 mm resin inlays increased when the dentin layer thickness was reduced and the enamel or translucent layer thickness was increased. The highest power density was recorded with dentin layer thickness of 0.1 mm and increased translucent layer thickness in all light curing units. Conclusions: To enhance the power density through resin inlays, reducing the dentin layer thickness and increasing the translucent layer thickness would be recommendable when fabricating resin inlays. Objectives: The purpose of this study was to enhance curing light penetration through resin inlays by modifying the thicknesses of the dentin, enamel, and translucent layers. Materials and Methods: To investigate the layer dominantly affecting the power density of light curing units, resin wafers of each layer with 0.5 mm thickness were prepared and power density through resin wafers was measured with a dental radiometer (Cure Rite, Kerr). The dentin layer, which had the dominant effect on power density reduction, was decreased in thickness from 0.5 to 0.1 mm while thickness of the enamel layer was kept unchanged at 0.5 mm and thickness of the translucent layer was increased from 0.5 to 0.9 mm and vice versa, in order to maintain the total thickness of 1.5 mm of the resin inlay. Power density of various light curing units through resin inlays was measured. Results: Power density measured through 0.5 mm resin wafers decreased more significantly with the dentin layer than with the enamel and translucent layers (p < 0.05). Power density through 1.5 mm resin inlays increased when the dentin layer thickness was reduced and the enamel or translucent layer thickness was increased. The highest power density was recorded with dentin layer thickness of 0.1 mm and increased translucent layer thickness in all light curing units. Conclusions: To enhance the power density through resin inlays, reducing the dentin layer thickness and increasing the translucent layer thickness would be recommendable when fabricating resin inlays.
와이블 고장모형 하에서의 이중샘플링 T<sup>2</sup> 관리도의 경제적-통계적 설계 (이중샘플링 T<sup>2</sup> 관리도의 경제적-통계적 설계)
홍성옥,이민구,이주호,Hong, Seong-Ok,Lee, Min-Koo,Lee, Jooho 한국품질경영학회 2015 품질경영학회지 Vol.43 No.4
Purpose: Double sampling $T^2$ chart is a useful tool for detecting a relatively small shift in process mean when the process is controlled by multiple variables. This paper finds the optimal design of the double sampling $T^2$ chart in both economical and statistical sense under Weibull failure model. Methods: The expected cost function is mathematically derived using recursive equation approach. The optimal designs are found using a genetic algorithm for numerical examples and compared to those of single sampling $T^2$ chart. Sensitivity analysis is performed to see the parameter effects. Results: The proposed design outperforms the optimal design of the single sampling $T^2$ chart in terms of the expected cost per unit time and Type-I error rate for all the numerical examples considered. Conclusion: Double sampling $T^2$ chart can be designed to satisfy both economic and statistical requirements under Weibull failure model and the resulting design is better than the single sampling counterpart.
홍성옥 대한통합치과학회 2013 대한통합치과학회지 Vol.2 No.2
Majority of traumatic dental injuries occurs in younger people. Traumatic dental injury of maxillary anterior teeth can influence the pychologic and emotional states of patient. Proper diagnosis, rapid emergency treatment and periodic follow up are important for increasing a favorable outcome. The guidelines of IADT represent the current best evidence and practice based on literature research and professional’s opinion. The most important thing is to prevent trauma and to treat quickly following guidelines of IADT when injury occur for minimizing the complications.
홍성옥 건국대학교 조형연구소 2003 조형연구 Vol.11 No.-
Milton Glaser is the one of the distinctive designer representing the unique beauty of the modern graphic illustraition. He presents self-distinctive techneque as studying of all modern trend of art movement. He developed traditional formative base into the origianal creative base. This is an effect of new technique which emphasize on the symbolism as not only the means of the communication but also as the expression of the designer's intention. Therefore, his artwork owns special character that makes observers feel and think, together with the function of the informative delivery including idea and concept of artist's. Especially, he produces artwork of poster as mixing the san-serif's literary style with the image of brightness and magnifience. The purpose of this study is to summarize Milton Glazer's contribution on the modern art history to grasp the new trend of art movement, and to rediscover him who raise the graphic design's status. His contribution is great expectation of the status of Modern graphic design.