• The Journal of the Korea Contents Association
• /
• v.20 no.12
• /
• pp.250-265
• /
• 2020

In the N-Screen environment, HTML5 standard-based content development is inevitable. However, it is still passive the development of HTML5 manipulation type contents due to high development cost and insufficient infrastructure. Therefor we propose an efficient contents development model by convergence multimedia contents (such as video and audio) with HTML5 documents that can implement dynamic manipulation for user interaction. The proposed model is designed to divide the multimedia and iframe areas in the HTML5 layout page included the player for integrated contents control. Interactive HTML5 documents are divided into screen units and provided through iframe. The integrated control player composed based on the HTML5

• Transactions on Electrical and Electronic Materials
• /
• v.4 no.4
• /
• pp.22-25
• /
• 2003

High series resistance due to the presence of glass frit is one of the major problems for screen printed silicon solar cells. Cells having electrical parameters below the prescribed values are usually rejected during solar module fabrication. Therefore, it is highly desirable to improve the electrical parameters of the silicon solar cells and thereby to increase the overall production yield. It was observed that, the performance of low quality mono-crystalline silicon solar cells made by standard screen printing technology could be improved remarkably by novel surface treatment. We have chemically treated the surface using sodium hydroxide (NaOH) and silver nitrate ($AgNO_3$) solutions. NaOH treatment helps to reduce the series resistance by decreasing the presence of excess glass frit on the top silver grid contact. The $AgNO_3$ treatment is used to reduce the series resistance comes from the deposition of silver on the grids by filling the holes present (if any) within the grid pattern.

• Molecular & Cellular Toxicology
• /
• v.2 no.2
• /
• pp.106-113
• /
• 2006

Phthalate analogues are a plasticizer and solvent used in industry. Phthalates were classified in the category of "suspected" endocrine disruptors. The purpose of our study was to screen and elucidate the endocrine disrupting activity of seven phthalate analogues. E-screen assay was performed in MCF-7 human breast cancer cells with seven phthalate analogues. In this cell proliferation assay, benzyl butyl phthalate (BBP) and dibutyl phthalate (DBP) showed high estrogenic activity. Their relative proliferation efficiencies (RPE) were 109 and 106%, respectively. In vitro estrogen receptor (ER) binding assay, BBP, di-n-octyl phthalate (DOP) and dinonyl phthalate (DNP) showed weak relative binding affinity (RBA: 0.02%) compared to $17{\beta}-estradiol\;(E2)$ (RBA: 100%). In uterotrophic assay, E2 produced a significant increase, whereas four tested phthalate analogues had potential estrogenic effects in vitro did not increased in uterus weight in immature rats. From these results, we demonstrated that phthalate analogues exhibit weak estrogenic activity in vitro assays at high concentrations. Although phthalates induced an increase in MCF-7 cell proliferation by an estrogenic effect, they could not induce a uterus weight increase in vivo. From these, we may suggest that these phthalate analogues are easily metabolized to inactive forms in vivo. Further investigation in other in vitro and in vivo experimental systems might be required.

• Polymer(Korea)
• /
• v.25 no.2
• /
• pp.186-198
• /
• 2001

pH/Thermal sensitive copolymers with the various acidic comonomer compositions composed of N-isopropylacrylamide (NIPAAm) with acrylic acid (AAc), 2-acrylamido glycolic acid (AAmGAc), and 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) were synthesized by free radial polymerization. In this study, to characterize the effect of different acidic comonomer composition and pH on the lower critical solution temperature (LCST) behaviors of their copolymers. phase transition experiments were performed with a thermo-optical analyzer (TOA). The phase transition temperature (T$^{p}$ ) of aqueous poly(NIPAAm-co-AAc) solution was lowered with increasing the ionization of the acid group in AAc, that is, the ionized state induced the electrostatic repulsion of ionized groups. In contrast, when AAmGAc was introduced into PNIPAAm, T$^{p}$ was little changed at pH 1-3, whereas climbed up significantly from pH 1 to pH 3. In the range of pH 6-10, Tp was lower than that of pH 3-5. This result was considered to be \"Ionic Screen Effect\" and this effect had been also observed in the case of poly(NIPAAm-co-AMPS).-co-AMPS).

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2022.10a
• /
• pp.400-403
• /
• 2022

This paper propose a GPU-based N-body collision detection algorithm using LBVH (Linear Bounding Volume Hierarchy) technique. This algorithm introduces a new modified Morton code scheme where the codes use an information about how much each body takes a space in the screen space. This scheme improves the GPU sorting performance of the N-Body because it culls out invisible objects in natural manner. Through the experiments, we verifies that the proposed algorithms can have at least 15% performance improvement over the existing methods

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.457-458
• /
• 2015

Recently, the development of cloud technology, related to service has spread to various fields. In the game field, to develop the N screen services using cloud technology without regard to the performance of the device, there is incresing interest to have been able to play to share any information of user in a variety of platforms. This paper aims to find the feature of game was developed using the cloud technology. After literature on the cloud technology research were reviewed, it is checked to how apply in the currently released cloud based game, based on find the features of the game. We expect to develop the cloud based game with feature of cloud and apply to develop the N screen game in the future.

• Microbiology and Biotechnology Letters
• /
• v.27 no.2
• /
• pp.96-101
• /
• 1999

Various side-chains are introduced to the 7-amino position of 7-aminocepha-losporanic acid (7-ACA) to make semi-synthetic cephalosporin antibiotics. In order to convert cephalosporin C (CPC) to 7-ACA, two enzymatic reactions are generally imployed. Glutary1-7-aminocephalosporanic acid (Gl-7-ACA) acylase is involved in the second step where the reaction intermediate, Gl-7-ACa is converted into 7-ACA. It was recently reported that CPC amidase can convert CPC directly into 7-ACA in a single enzymatic reaction. A study was undertaken to screen microorganisms conferring enzyme activity to convert Gl-7-ACA or CPC into 7-ACA by one or two enzymatic reactions. In order to screen the microorganisms rapidly, a non-$\beta$-lactam model compund, glutaryl-$\rho$-nitroanilide, was utilized in an early stage, thereafter the selected microorganisms were examined with real substrates. One microorganism exhibiting both Gl-7-ACA acylase and CPC amidase activities was obtained by the colorimetry method and HPLC assay, and was identified as a strain of Serratia species, designated as Serratia sp. N14.4. The optimal fermentation conditions for Serratia sp. N14.4 was pH9.0 and 3$0^{\circ}C$.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2007.11a
• /
• pp.15-16
• /
• 2007

The high efficiency and low cost solar cells in order to it applied a dopant pastes diffusion process. The dopant pastes diffusion process which it uses is easily applied in screen-printing solar cells output line. in this paper, it used the Ferro 99-038 phosphorus diffusion pastes source and it analyzed a sheet resistance and a uniformity degree. And it knew the quality of the sheet resistance which it follows in temperature and time condition. The temperature variable it let and it fixed the time in 7 minutes. It will be able to measure the sheet resistance of $40({\Omega}/sq),\;30({\Omega}/sq),\; 20({\Omega}/sq)$. also average uniformity of the sheet resistance was below 5%.

• Journal of Korea Society of Digital Industry and Information Management
• /
• v.10 no.4
• /
• pp.181-195
• /
• 2014

The game Industry has been a major leader in business world with its size and volume in terms of profit and culture contents, and ever increasing at the moment. Cloud Game has appeared as a new, combined game format, playable on smart TV and smart phone with its upgraded storage size and fast spreading N-screen. This research studies the present reality of the cloud industry by focusing on three categories which are device type, Platform, and game contents consequently in order to determine the future prospect of cloud games. First, the cloud game business will thrive as devices such as smart TV and smart phone are used widely. Second, the cloud game industry will have a new era when OS systems of Platform are united effectively. Third, the previous platform holders will have to face new challenges brought up by cloud games' service providers. Forth, the gamer, developer, and service provider need each other in order to widen the spectrum of business in cloud game industry.

• Journal of Korean Society of Environmental Engineers
• /
• v.28 no.7
• /
• pp.697-703
• /
• 2006

Endocrine disruptors were measured with GC/MS in effluents discharged from sewage treatment processes in pilot scale for the purpose of water reuse. From that analysis, we compared the removal rate of them by treatment processes. Nonylphenol was mainly detected in effluents and high concentration from 0.36 to 0.94 ${\mu}g/L$. $17{\beta}$-estradiol(E2) and $17{\alpha}$-ethynylestradiol(EE2) were detected as below the limit of detection in effluent. Endocrine disruptors were removed effectively in the range from 50 to 100% by treatment process. EC50 value($9.0{\times}10^{-3}$ M) of $17{\beta}$-estradiol(E2) by dose response curve of E-screen assay has higher than that of bisphenol A($2.736{\times}10^{-5}M$) and p-octylphenol($9.760{\times}10^{-6}$ M). These results showed that alkylphenols have lower relative estrogen potency than other estrogens such as $17{\beta}$-estradiol(E2). Calculated estrogenic activity(ng-EEQ/L) was 2 times higher than measured total estrogenic activity which estimated by E-screen assay. Moreover estrogenic activity of effluent by treatment process showed very low as below 1 ng-EEQ/L.