• Korean journal of communication and information
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• v.80
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• pp.224-253
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• 2016

In this study, we analyzed the television news frames related to private school irregularities. Television broadcasting stations have not dealt with underlying problems of private school irregularities, but their reporting have been focused more on stating the situations. While Public announcing frame, Interference and solutions frame, Moral hazard frame and Protests and strikes frame have been applied in reporting, Autonomy highlighted frame and Publicity highlighted frame which are fundamental to the existence of private schools hardly appeared. In particular, the adhesion between private schools and political power has been continuously pointed out to be a cause of raising problems, whereas articles with such perspectives were hard to find. As a result, television broadcasting stations are required to change the way in reporting of private school irregularities in order for a lively discussion about them as the social agenda.

• KSBB Journal
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• v.10 no.2
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• pp.131-136
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• 1995

0.374(1/day) of specific growth rate and 0.435(mg/108 viable cells) of Anti-Microbial factor (AMF) productivity were obseaved for the batch cultivation of human promyelocytic cells in 10% serum containing medium. The crude protein was purified 10 folds by a serial purification steps of ion exchange chromatography, Bio-Rex 70 and gel filtration chromatography, Sephadex G-70 and 100. The ranges of MIC(Minimal Inhibitory Concentration) of commercially available antibiotics, penicillin G, streptomycin and ampicillin was estimated as 40 to ($70\mu\textrm{g}$/ml) on Gram (-) E. coli and Gram (＋) Streptococcus aureus. The values of the MBC (Minimal Bactericidal Concentration) of Purified AMF was ($0.5\mu\textrm{g}$/ml) and 0.4($\mu\textrm{g}$/ml), respectively. The molecular weight of the AMF was estimated as 15,000 dalton by SDS-PAGE.

• Journal of the Institute of Electronics Engineers of Korea SC
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• v.48 no.5
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• pp.93-98
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• 2011

In this paper, we propose the surveillance and combat robot framework for remote monitoring and robot control on the smart phone, which is implemented with the fusion technology called RITS(Robot technology & Information Technology System). In our implemented system, the camera phone mounted on the robot generates signals to control the robot and sends images to the smart phone of the operator. Therefore, we can monitor the surrounding area of the robot with the smart phone. Besides the control of the movement of the robot, we can fire the weapons armed on the robot by sending the fire command. From experimental results, we can conclude that it's possible to control the robot and monitor the surrounding area of the robot and fire the weapons in real time in the region where the 3G(Generation) mobile communication is possible. In addition, we controlled the robot using the 2G mobile communication or wired phone when the robot is in the visual range.

• Fisheries and Aquatic Sciences
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• v.18 no.1
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• pp.1-6
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• 2015

In an effort to discover alternative antimicrobials against Listeria monocytogenes, several marine algae were screened. The methanolic extract of Ecklonia cava exhibited the highest antibacterial activity against L. monocytogenes, with the ethyl acetate (EtOAc) soluble fraction of E. cava methanolic extract having a MIC value of $256{\mu}g/mL$ and a MBC value of ${\mu}g/mL$. The MIC values of streptomycin in combination with the EtOAc fraction were markedly reduced up to 64-fold, suggesting that the antibacterial activity of the antibiotic was restored when combined with the EtOAc fraction. The interaction between streptomycin and the EtOAc fraction was assessed by fractional inhibitory concentration (FIC) indices. The combination of streptomycin and the EtOAc fraction against L. monocytogenes resulted in ${\Sigma}FIC_{min}$ range of 0.141 to 0.266 and ${\Sigma}FIC_{max}$ of 0.531 for all strains. The median ${\Sigma}FIC$ against L. monocytogenes strains ranged from 0.172 to 0.344. Thus, synergistic ranges of FIC <1 were observed for all combinations of streptomycin and the EtOAc fraction against L. monocytogenes strains. Indeed, the median ${\Sigma}FIC$ of streptomycin-EtOAc fraction ranged from 0.172 to 0.344, suggesting a marked synergy.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.113-122
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• 2011

Visual images are very close to our living and we make decisions and choose behavioral options with the visual images on mass media. In current-affair documentary programs, interviews have potential effects that can change public opinions on important issues. Therefore, it's a consequence that the study examined how different expressions of visual images in documentary. Using preceding research methods, this study focus on form, color, movement and depth of visual images. This study analyzed quantitatively all interview shots with 15 current-affair documentary programs from major TV stations such as KBS, MBC and SBS. The findings of the study are 1) half of interview shots used the visual image expressions to hide interviewees' face according to the shield law, 2) choosing close-up shots in company with bust shots, 3) using natural lights and hand-held camera techniques for interviews, and 4) showing wide angles without depths of visual image.

• The Korean Journal of Food And Nutrition
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• v.13 no.1
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• pp.36-44
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• 2000

Survival of pathogenic bacteris(S. aureus, L. monocytogenes, E. coli and S. typhimurium) in tryptic soy broth containing green tea water extract(GTW), green tea ethanol extract(GTE), potassium sorbate (PS) and sodium benzoate(SB) stored at various pH was evaluated. Tryptic soy broth(TSB) containing 0∼2%(w/v) of green tea extracts and preservatives adjusted to pH 5.5, 6.0, 6.5 and 7.0 was inoculated approximately 105 CFU/ml of pathogenic bacteria and incubated at 35$^{\circ}C$ for 24∼48 hours. Survival of bacteria was determined by viable cell counts of bacterial culture at each pH. Minimum inhibitory concentration(MIC) and minimum bactericidal concentration(MBC) of green tea extracts and preservatives against pathogenic bacteria were derived from survival curves of each bacteria. Antibacterial activities of green tea extracts increased with increasing pH but those of preservatives decreased with increrasing pH. S. aureus was the most sensitive strain to GTW and GTE but the most resistant to PS and SB. The MICs of green tea extracts to S. aureus were 0.52∼0.98% at pH 5.5∼6.0 and non inhibitory at pH 7.0. S. typhimurium was the most resistant to green tea extracts while the most sensitive to SB. The MICs of green tea extracts to S. typhimurium were 0.46∼1.62% at pH 5.5∼6.0 and 2% of PS was bactericidal at pH 5.5. 1.0∼2.0% of GTE were bactericidal to all strains tested except L. m9oncytogenes at pH 7.0. GTE was most efficient at inactivating pathogenic bacteria, generally followed by GTW, PS and SB.

• YAKHAK HOEJI
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• v.38 no.3
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• pp.265-273
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• 1994

ln vitro and in vivo antibacterial activities of DWQ-013(1-cyclopropyl-6,8-difluoro-7-(3-methylthiomethylpyrrolidinyl)-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid), a new fluoroquinolone antibacterial agent, were compared with those of ciprofloxacin, sparfloxacin and ofloxacin against aerobic and anaerobic standard strains and clinical isolates. DWQ-013 had a broad spectrum and potent antibacterial activity against Gram-positive and Gram-negative bacteria. The antibacterial activity of DWQ-013 against Staphylococcus aureus was equal to that of sparfloxacin(SPFX) and superior to those of ciprofloxacin(CPFX). The antibacterial activity against Gram-negative bacteria was slightly lower than those of ciprofloxacin and sparfloxacin. MIC of DWQ-013 against Pseudomonas aeruginosa$(0.781{\sim}1.563\;{\mu}g/ml)$ was usually equal to that of sparfloxacin$(0.781\;{\mu}g/ml)$ and was inferior to that of ciprofloxacin$(0.098\;{\mu}g/ml)$. The number of viable cells was decreased rapidly after addition of DWQ-013 at concentration of $1{\sim}2$ folds of MIC.

• Journal of Veterinary Clinics
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• v.34 no.4
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• pp.261-267
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• 2017

The aim of this study was to investigate the antibacterial properties of chitosan silver nanocomposites (CAgNCs) using pathogenic Vibrio ichthyoenteri as a bacterial model. Results of agar disc diffusion and turbidimetric assays showed that CAgNCs could inhibit the growth of V. ichthyoenteri in concentration dependent manner. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of CAgNCs were 75 and $125{\mu}g/mL$, respectively. Furthermore, CAgNCs treatment induced the reactive oxygen species (ROS) level in V. ichthyoenteri cells in concentration and time dependent manner, suggesting that it generates oxidative stress, leading to bacterial cell death. The field emission scanning electron microscope (FE-SEM) images of CAgNCs treated V. ichthyoenteri exhibited strong cell membrane damage than un-treated control bacteria. MTT assay results showed the highest cell viability (22%) at $75{\mu}g/mL$ of CAgNCs treated bacteria samples. The results from this study suggest that CAgNCs is a potential antibacterial agent to control fish pathogenic bacteria.

• Korean journal of communication and information
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• v.23
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• pp.79-112
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• 2003

The purpose of this study is to explore the way that power in cyberspace is constructed and work and the factors that contribute to forming the power by analyzing a bulletin board system(BBS) on an everyday drama, "Can't Take My Eye Off You"(MBC). Research findings are as follows. The participants in the BBS produce various discourses and constantly compete with each other. In the process, the participants who produce a dominant discourse in quantity tend to exclude other discourses from the BBS and the participants who produce the minority discourses sometimes resist the dominant discourse but tend to refrain from expressing the minority discourses. These tendencies have intensified, and eventually the dominant discourse overwhelmingly powers over the BBS at the end of it. The dominant discourse in the BBS is confucian patriarchal one and this is primarily due to the characteristic of the BBS as the fandom of the drama, the participants' experience and dominant culture in their embodied social world, and the authorship of the drama.

• Korean journal of communication and information
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• v.48
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• pp.25-45
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• 2009

The convergence of broadcasting & telecommunication is not a reality by itself, but recognized as a reality by the discourse which defines and explains it. It is the premise from which this article aims at studying how the discourse on the broadcasting-telecommunication convergence is formed, practised and transformed. This study compares the case of France with the case of Korea in order to show how the same discourse can engender different consequences and evolve in a different way in different socio-political situations. The discourse of the convergence was born as a scientific knowledge in the reports of the European Commission and OECD, and accepted as an important object generating social debates. Then, the discourse faces the resistance of pre-existent discourses in France, while it spreads without clash in South Korea. The French discourse results in a horizontal regulation of contents and networks, while the Korean discourse creates a unique regulator for both traditionally distinguished sectors. Finally, unlike France, the scientific discourse of the convergence in South Korea is transformed into even a political, imaginary or utopian discourse.