http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Je-Ryung Lee,Tae-Jin Je,Sangwon Woo,Yeong-Eun Yoo,Jun-Ho Jeong,Eun-chae Jeon,Hwi Kim 한국광학회 2018 Current Optics and Photonics Vol.2 No.2
In this paper, mesoscale optical surface structures are found to possess both geometric and wave optics features. The study reveals that geometric optic analysis cannot correctly predict the experimental results of light transmission or reflection by mesoscale optical structures, and that, for reliable analyses, a hybrid approach incorporating both geometric and wave optic theories should be employed. By analyzing the transmission patterns generated by the mesoscale periodic pyramid prism plates, we show that the wave optic feature is mainly ascribed to the edge diffraction effect and we estimate the relative contributions of the wave optic diffraction effect and the geometric refraction effect to the total scattering field distribution with respect to the relative dimension of the structures.
Lee, Je-Ryung,Jeon, Eun-chae,Kim, Hwi,Woo, Sang-Won,Je, Tae-Jin,Yoo, Young-Eun,Lee, Eung-Sug Korean Society for Precision Engineering 2015 International Journal of Precision Engineering and Vol.16 No.7
The use of an optical plate to enhance light efficiency of LED systems was suggested. The optical plate technology indicates that polymeric optical plates having optical patterns on themselves are placed on LED systems. We designed and manufactured an optical plate that enhance light efficiency, and verified its optical characteristics in this study. The shape and the size of the spherical lens patterns were designed based on the lens formula including the refraction indices of air and PMMA, thickness of the optical component and the optical distance. To manufacture the optical plate having the designed spherical lens patterns, a metal mold was machined by ultra-fine punching machining technology. Using the ultra-fine punching machining system, spherical lens patterns with 0.45 mm in height, 1.15 mm in diameter were successfully machined on the top of a mold of 90 * 60 mm2 size. Using the machined mold and transparent PMMA, an optical plate with the spherical lens patterns was molded by injection molding technology. The optical plate was placed on the LED system, and the luminance was measured with and without the optical plate, and as a result the average and the maximum intensity increased by 1.4 times and 1.3 times respectively.
Manufacture of microscale random pattern using indentation machining technology
Je-Ryung Lee,Seung Hwan Moon,Tae-Jin Je,Doo-Sun Choi,Hwi Kim,Eun-chae Jeon 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.7 No.6
The display industries recently demand new microscale dot-type patterns for thinner and brighter displays with high energy efficiency, which are randomly distributed with irregular separation distances and have uniform optical characteristics. We developed a new program to generate the coordinates of the controlled microscale random patterns considering their diameter and the distance to the nearest pattern for preventing overlap of each pattern. Then the microscale random patterns were machined on a metal mold using the indentation machining which is a simple and low-cost machining method. We decreased the total machining time by the optimization of machining order of the random patterns. The coordinates, the diameter and the fi ll-factor of the machined patterns by the indentation machining were much consistent to the designed values. The controlled microscale random patterns had uniform optical characteristics over all areas of the manufactured optical fi lm. Moreover, if optical films have the same diameters and fi ll-factor, they showed the same optical characteristics even they have totally different coordinates of random microscale patterns. This technology is expected to reduce the number of the optical films and the light sources in the display, which can save much energies.
이재령(Je-Ryung Lee),전은채(Eun-chae Jeon),제태진(Tae-Jin Je),우상원(SangWon Woo),최두선(Do-Sun Choi),유영은(Yeong-Eun Yoo),김휘(Hwi Kim) 한국기계가공학회 2014 한국기계가공학회지 Vol.13 No.4
A transparent poly methyl methacrylate (PMMA) optical micro-pyramid array-pattern is designed and fabricated using an injection modeling technique. The device’s optical characteristics are tested and analyzed theoretically. In the optical pattern generated using the fabricated PMMA pattern, the components, due to not only refraction but also diffraction, are observed simultaneously. Wave optic modeling and analysis reveals that the energy ratio between the diffraction and refraction in the optical pattern are dependent on the critical dimension of the optical pattern such that refraction and diffraction tend to be directly and inversely proportional to the pattern dimension, respectively.
( Je Byeong Chae ),( Jung-won Shin ),( Hye-ryung Choi ),( Kyung-mi Nam ),( Hyun-sun Lee ),( Sung-ae Kim ),( Hyun-jae Joe ),( Kyoung-chan Park ) 대한피부과학회 2017 대한피부과학회 학술발표대회집 Vol.69 No.2
Background: Stem cell markers of interfollicular epidermis (IEF) have not been established thus far. Objectives: The aim of this study is to suggest a new way to disclose IFE-stem cells by combining the expression of histone deacetylases (HDAC) 1 and p63. Methods: Immunohistochemical staining of HDAC1 and p63 was performed in six normal human samples. Moreover, a skin equivalent (SE) model was treated with suberoylanilohydroxamic acid (SAHA, a HDAC inhibitor) to elucidate the role of HDAC1. Finally, rapidly adhering (RA) keratinocytes to type IV collagen, which have been identified to represent epidermal stem cells, were subjected to Western blot analysis with antibodies against HDAC1. Results: In normal samples, there was a minor subpopulation comprised of p63-positive and HDAC1-negative cells in the basal layers. The proportion of this subpopulation was decreased with age. In the SE model, SAHA treatment increased the epidermal thickness and number of p63-positive cells in a dose dependent manner. After SAHA treatment, the expression of differentiation markers was decreased, while that of basement membrane markers was increased. In a Western blot analysis, HDAC1 was not expressed in RA cells. Conclusion: The combination of p63-positive and HDAC1-negative expressions can be a potential new way for distinguishing epidermal stem cells.
Lee, Sun-Ryung,Sonn, Jong-Kyung,Yoo, Byung-Je,Lim, Young-Bin,Kang, Shin-Sung Korean Society for Biochemistry and Molecular Biol 1998 Journal of biochemistry and molecular biology Vol.31 No.4
To understand the role of protein kinase C (PKC) in the regulation of chondrogenesis, we examined proteins which are phosphorylated by PKC. Stage 23/24 chick embryo wing mesenchymes were micromass-cultured to induce chondrogenesis and cell extracts were phosphorylated in a condition that activates PKC. Several proteins including 63 and 66 kDa proteins were phosphorylated. The 66 kDa protein was phosphorylated only in the presence of phorbol 12-myristate 13-acetate (PMA) and phosphatidylserine CPS), and the phosphorylation was almost completely diminished by bisindolylmaleimide, a PKC inhibitor. In addition, partially purified PKC increased the phosphorylation of the 66 kDa protein. Treatment of cultures with lysophosphatidylcholine (LPC) promoted chondrogenesis and phosphorylation of 66 kDa protein, while PMA and thymeleatoxin inhibited both of the two events. Our results suggest that the 66 kDa protein is a putative substrate of PKC, and phosphorylation of the 66 kDa protein, probably by $PKC\alpha$ is required for chondrogenesis.