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The Study of High Brightness Prism Patterned LGP using Optical Simulation Analysis
Chul-Ho Ok,한정민,Jeoung-Yeon Hwang,서대식 한국전기전자재료학회 2007 Transactions on Electrical and Electronic Material Vol.8 No.4
We have designed high performance prism light-guide plate (LGP) in 17 inch TFT-LCD. In test result to embody high brightness BLU in case of LGP of base and upper surface with 17 inch, thickness 8 mm adding prism construct, it is superior brightness improvement than previous that of printing form about some 20 % and in this course to embody actual material it succeeded prism LGP production by 17 inch injection form process.
Hwang, Hyun-Jun,Lim, Soo-Chul,Ok, Kyung-Chul,Park, Jin-Seong,Kim, Hak-Sung IOP 2016 Nanotechnology Vol.27 No.50
<P>An ultra-high speed photonic sintering method consisting of flash white light (FWL) combined with near infrared (NIR) and deep UV light irradiations was developed to fabricate a SrTiO<SUB>3</SUB> (STO) thin film for application in electro-vibration touch panels. The STO thin film was sintered on PEN by FWL irradiation at room temperature under ambient conditions, which is a dramatically simple and ultrahigh speed fabrication process compared to the conventional high temperature (600 °C–900 °C) thermal sintering process. The effects of the FWL irradiation conditions (energy density, pulse numbers, and pulse duration) on the dielectric constant of the sintered STO thin films were evaluated. Furthermore, the effects of NIR and deep UV irradiation during the FWL sintering process were also investigated.</P>
( Chul Ju Hwang ),( Hyung Mun Yun ),( Kyung Ran Park ),( Ju Kyung Song ),( Hyun Ok Seo ),( Byung Kook Hyun ),( Dong Young Choi ),( Hwan Soo Yoo ),( Ki Wan Oh ),( Dae Yeun Hwang ),( Sang Bae Han ),( Ji 영남대학교 약품개발연구소 2015 영남대학교 약품개발연구소 연구업적집 Vol.25 No.-
Estrogen has been known to reduce the development of Alzheimer’s disease (AD). However, exact mechanisms are not clear. We investigated whether estrogen can increase amyloid-beta (Aβ) degradation and affects Aβ- induced memory impairment in an estrogen deficiency model. Estrogen receptor alpha (ERα) knockout mice and wild-type mice were intracerebroventricular (ICV) infused with Aβ (300 pmol) for 2 weeks. Cognitive function was then assessed by the Morris water maze test and passive avoidance test. In addition, Western blot analysis, immunostaining, immunofluorescence staining, ELISA, and enzyme activity assays were used to examine the degree of Aβ deposition in the brains of ERα knockout mice. In our present study, Aβ was accumulated more in the ERα knockout mice brain and greatly worsened memory impairment and glial activation as well as neurogenic inflammation. These results suggest that estrogen may protect memory impairment by stimulating the degradation of Aβ and down-regulate neurogenic inflammation as well as amyloidogenesis.
Chul-Ho Ok,Dong-Hun Kang,Kang-Min Lee,Jin-Woo Han,Byoung-Yong Kim,오병윤,Young-Hwan Kim,Jeong-Yeon Hwang,Sang-Keuk Lee,한정민,서대식 한국전기전자재료학회 2007 Transactions on Electrical and Electronic Material Vol.8 No.6
The liquid crystal (LC) aligning capabilities of a nematic liquid crystal (NLC) on a homeotropic polyimide (PI) surface using a new ion-beam method were studied. Exposure ion-beam of 45 ° incidence angle shows a good LC alignment of the NLC on the homeotropic PI surface. Also, on the homeotropic PI surface, the tilt angle of the NLC by exposure ion-beam of 45 ° incidence angle had a tendency to decrease as increased ion-beam energy density. And, on the homeotropic PI surface, the alignment character of the NLC with respect to ion-beam energy was good at 1500 eV. And we achieved satisfactory result for EO character.
Ok, Chul-Ho,Kang, Dong-Hun,Lee, Kang-Min,Han, Jin-Woo,Kim, Byoung-Yong,Oh, Byeong-Yun,Kim, Young-Hwan,Hwang, Jeong-Yeon,Lee, Sang-Keuk,Han, Jeong-Min,Seo, Dae-Shik The Korean Institute of Electrical and Electronic 2007 Transactions on Electrical and Electronic Material Vol.8 No.6
The liquid crystal(LC) aligning capabilities of a nematic liquid crystal(NLC) on a homeotropic polyimide(PI) surface using a new ion-beam method were studied. Exposure ion-beam of $45^{\circ}$ incidence angle shows a good LC alignment of the NLC on the homeotropic PI surface. Also, on the homeotropic PI surface, the tilt angle of the NLC by exposure ion-beam of $45^{\circ}$ incidence angle had a tendency to decrease as increased ion-beam energy density. And, on the homeotropic PI surface, the alignment character of the NLC with respect to ion-beam energy was good at 1500 eV. And we achieved satisfactory result for EO character.
Memory Impairment in Estrogen Receptor α Knockout Mice Through Accumulation of Amyloid-β Peptides
Hwang, Chul Ju,Yun, Hyung-Mun,Park, Kyung-Ran,Song, Ju Kyung,Seo, Hyun Ok,Hyun, Byung Kook,Choi, Dong Young,Yoo, Hwan-Soo,Oh, Ki-Wan,Hwang, Dae Yeun,Han, Sang-Bae,Hong, Jin Tae Springer US 2015 Molecular Neurobiology Vol.52 No.1
<P>Estrogen has been known to reduce the development of Alzheimer’s disease (AD). However, exact mechanisms are not clear. We investigated whether estrogen can increase amyloid-beta (Aβ) degradation and affects Aβ-induced memory impairment in an estrogen deficiency model. Estrogen receptor alpha (ERα) knockout mice and wild-type mice were intracerebroventricular (ICV) infused with Aβ (300 pmol) for 2 weeks. Cognitive function was then assessed by the Morris water maze test and passive avoidance test. In addition, Western blot analysis, immunostaining, immunofluorescence staining, ELISA, and enzyme activity assays were used to examine the degree of Aβ deposition in the brains of ERα knockout mice. In our present study, Aβ was accumulated more in the ERα knockout mice brain and greatly worsened memory impairment and glial activation as well as neurogenic inflammation. These results suggest that estrogen may protect memory impairment by stimulating the degradation of Aβ and down-regulate neurogenic inflammation as well as amyloidogenesis.</P><P><B>Electronic supplementary material</B></P><P>The online version of this article (doi:10.1007/s12035-014-8853-z) contains supplementary material, which is available to authorized users.</P>