• Journal of the Korea Society of Computer and Information
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• v.15 no.1
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• pp.103-109
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• 2010

As color was used for formative language since a human activity was beginning, all the symptoms in the world that the human eye can see is present. In this paper, we identify Korea traditional color harmony for extracted key frames from scene change detection. Traditional color is classified as 5-Jung-color and 5-Kan-color, and determine whether to harmony. Red, blue, yellow, black, and white, called 5-Jung-color and pink, blue, purple, sulfur, and green, called the 5-Kan-color was identified. First, we extract edge using Canny algorithm. And, we are labeling and clustering colors around the edge. Finally, we identify the traditional color using identification method of traditional color harmony. The proposed study in this paper has been proven through experiments.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2006.06a
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• pp.424-425
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• 2006

Zinc sulfide is a well-known host material of phosphor emitting different radiations dependent on different doping impurities of metallic ion. It emits green, blue, orange-yellow or white colors by doping with activators such as copper, silver, manganese and so on. In this study, manganese, copper and chlorine doped ZnS phosphor (ZnS:Mn,Cu,Cl) was synthesized by solid-state reaction method. The optical properties were investigated according to different concentrations of sulfur and activators used during the synthesis process.

• Journal of Life Science
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• v.7 no.4
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• pp.316-321
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• 1997

The effects of the silver ion-exchanged water treatment agent (Ag-Os) upon E. coli RB 797 and Bacillus sp. have been discussed in this study. Silver ion causes a number of toxic effects with no known biological function. Silver ion-exchanged water treatment agent (Ag-Os) using oyster shell here showed antimicrobial activities. the soluble form of silver ion in water is more toxic to the growth of Bacillus sp. than that of E. Coli RB 797. The minium amount of Ag-Os needed for growth inhibition is 0.2 mg/ml for E. Coli RB 797 and 0.02 mg/ml for Bacillus sp., which is consistant with the data of the survival cell fraction. Binding studies suggested that binding of silver to the cell surface was a rapid, metabolic-independent process and different from active transport. Bacillus sp. showed more binding than E. Coli RB 797. Reducing substances of the cell cultures in the presence of Ag-Os was detected using Methylen blue as an indicator. From these results, we suggest that Ag-Os is effective as an antimicrobial agent on E. Coli RB 797 and Bacillus sp. and silver binds to the cells through rapid, metabolic-independent process and might complex to sulfur group in the cells for its toxicity.

• Korean Journal of Environmental Agriculture
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• v.42 no.4
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• pp.279-285
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• 2023

The demand for the fresh leaf of hooker chive, which is mainly used as functional roots and contains dietary sulfur or saponin, is increasing, but the leaves are only harvested 3-4 times per year under conventional field conditions. A plant factory system with different light qualities or intensities was applied for year-round production of the fresh leaves. Hooker chive (Allium hookeri) roots were hydroponically cultured under the plant factory with a mixture of blue plus red LEDs (Light-Emitting Diodes) and fluorescent lights for 50 weeks. Maximum leaf growth was attained with the 1.5 dS/m EC in the culture medium under the plant factory. The average leaf and shoot numbers of hooker chive grown hydroponically under a mixture of 200 µmol/m²/s LEDs increased by 147% and 140%, respectively compared to those under 100 µmol/m²/s LEDs at the 10th harvest. The leaf length of hooker chive grown under the LEDs treatment with the lowest light intensity significantly increased by 27% compared with the natural light treatment at the 10th harvest. However, there was no significant difference in leaf pigmentation between natural and 200 µmol/m²/s LEDs treatments. Plant factory with the mixture LEDs of blue and red lights can be applied for year-round production of hooker chive fresh leaves to ensure a stable supply of leafy vegetable throughout the year.

• KSBB Journal
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• v.20 no.6
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• pp.393-400
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• 2005

Hydrogen($H_2$) as a clean, and renewable energy carrier will be served an important role in the future energy economy. Several biological $H_2$ production processes are known and currently under development, ranging from direct bio-photolysis of water by green algae, indirect bio-photolysis by cyanobacteria including the separated two stage photolysis using the combination of green algae and photosynthetic microorganisms or green algae alone, dark anaerobic fermentation by fermentative bacteria, photo-fermentation by purple bacteria, and water gas shift reaction by photosynthetic or fermentative bacteria. In this paper, biological $H_2$ production processes, that are being explored in fundamental and applied research, are reviewed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.10a
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• pp.613-616
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• 2001

The effect of codopants on the electroluminescent properties for SrS-Ce based thin films was studied. The active layer was deposited by electron beam with sulfur The wavelength of eletroluminecence shifted with codopants and their concentrations. The intensity ratio of blue to green were found In the CeP-doped device, but the highest total intensity of luminance showed about 850cd/$m^2$ in the CeCl$_3$+KCL-doped device, which indicates that codopants are playing an important role of luminance. At any device, the luminance was the strongest at 0.2 mol% concentration among the concentration studied, suggesting the existence of optimum concentration. By post-annealing Luminance of most devices was improved, but the shift of wavelength was not observed.

• Journal of the Microelectronics and Packaging Society
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• v.9 no.1
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• pp.29-33
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• 2002

The SrS:Cu, Ag thin film electroluminescient devices were fabricated on $AlTiO_3$/ITO/glass substrates by electron-beam evaporation. The emission spectrum of the device was about 460 nm with $\chi$=0.20, y=0.29 in the CIE color coordinator. It was found that the emission spectrum was saturated to pure blue color when Ag sensitizer was doped in SrS:CuCl phosphors. The luminance of the device was increased by increasing the sulfur pressure. The measured luminance was saturated with 430 cd/$m^2$at the applied voltage of 90 V and the maximum luminance was 580 cd/$m^2$at 110V. The polarization charge and conduction charge of the devices were found to be found to be about $3.5\mu$C/$\textrm{cm}^2$ and $7.4\mu$C/$\textrm{cm}^2$, respectively.

• Korean Journal of Environmental Biology
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• v.35 no.2
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• pp.116-122
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• 2017

Basic dyes such as malachite green and methylene blue have been used as disinfectants to control water fungal infections since the 1930s. However, after succeeding reports of carcinogenicity and bioaccumulation of the dye, their use was forbidden in lieu of public health. This study undertook to evaluate the therapeutic effect of sulfur solution processed by effective microorganisms (EM-PSS) against Saprolegnia parasitica infection, and its safety in fish. In vitro antifungal evaluation of EM-PSS inhibited the growth of S. parasitica mycelia at concentrations of 50 ppm or higher. The acute toxicity test of EM-PSS to the mud fish (Misgurnus mizolepis) measured a no effect concentration (NOEC) at 100 ppm, the lowest effect concentration (LOEC) at 125 ppm, and the half-lethal concentration ($LC_{50}$) at 125 ppm in juvenile and 250 ppm in the immature stage. In addition, the ecotoxicity test of EM-PSS using Daphnia magna inhibited swimming of D. magna at concentrations of 100 ppm or less. Lastly, the EM-PSS prevented infection of S. parasitica to mud fish, at concentrations of 50 ppm. Furthermore, at 100 ppm concentration, the EM-PSS showed no acute toxicity on mud fish, nor any eco-toxic effects on D. magnano. Therefore, we conclude that carcinogenic disinfectants such as malachite green and methylene blue could be replaced by EM-PSS to remove S. parasitica in mud fish farming, and might be a potential eco-friendly disinfectant in aquaculture.

• Journal of Conservation Science
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• v.28 no.4
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• pp.321-328
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• 2012

A $SO_2$ gas acceleration test was carried out on four textile groups (silk, cotton, ramie cloth, hemp cloth) which were categoried in five categories by the dyeing materials (undyed, red, yellow, blue, black) and the relation between the concentration of $SO_2$ and deterioration rate was evaluated. The textiles were exposed to 0.01, 0.12, 1, 10, 100, 1000, and 5000 ppm of $SO_2$ for 24 hours and the optical, physical, and chemical deterioration rates were studied. An optical change was identified as the color difference and grey scale rating (colorfastness) enhanced with the increase of gas concentration while there was little physical change. Chemical damage was caused by the acidification of the textile material due to the trapped sulfate ion concentration. The result of optical, physical, and chemical deterioration rates shows that 1 ppm/day $SO_2$ is a critical level of deterioration of traditional textiles.

• Journal of Environmental Health Sciences
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• v.24 no.3
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• pp.131-136
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• 1998

Attached algal community and several physico-chemicai characters were investigated at Seokjong hot spring in Chollabukdo in February and in April, 1997. The results of physico-chemicai factors are as follows : water temperatures were varied from 6.5$^{\circ}$C to 32.0$^{\circ}$C; pH range was 6.9 to 7.7; The levels of electric conductivity were 105 $\mu$mhos/cm to 477 $\mu$mhos/cm; chemical oxygen demand(COD) range was 1.5 mg/l to 21.2 mg/l; ammonia concentration was 0.20 mg/l to 8.74 mg/l; nitrate concentrations were 0.36 mg/l to 2.43 mg/l; phosphate concentration was N.D. to 0.52 mg/l; sulfur concentration was 14.6 mg/l to 66.1 mg/l. Attacched algal species were identified. Totally, 63 taxa were classified and composed of 4 phylum, 4 class, 10 order, 17 family and 31 genera. The total biomass of attacched algae was $1.036 \times 10^{7}$ cells/l that composed of $5.39 \times 10^{6}$ cells/l of blue-green algae, $4.05 \times 10^{6}$ cells/l of diatom and $0.93 \times 10^{6}$ cells/l of green algae. The succession of dominant species was Synechocystis thermalis. This could be due to the thermal wastewaters. in biotic indices tests, the values of dominance index(DI) were 0.33 to 0.67 in winter, 0.18 to 0.68 in spring. The values of diversity index(H') were 1.44 to 2.69 in winter, 1.62 to 2.89 in spring. And the values of eveness index (J) were 0.31 to 0.61 in winter, 0.37 to 0.65 in spring.