• Journal of Korean Society for Atmospheric Environment
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• v.23 no.E2
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• pp.74-81
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• 2007

Feasibility test for a biofilter was performed to treat VOCs. The applied loading rate to the biofilter was calculated between 60 to $3,700\;kg\;COD/m^3$. Trimethyl-pentene and trimethyl-hexene were the two most dominant compounds and they occupy about 85 percent. During the acclimation period, it is desirable for a biofilter to receive relatively lower VOCs concentration and flow rate, until it can adjust to new substrate and operational environment. Temperature at various points inside the biofilter reactor was observed with more than 23 temperature sensors. With steam heating, temperatures of the top sections of the media were greater than those of bottom sections. Without steam heating, intermediate stages generally had higher temperature measurement than those of bottom and top stages. Because the pH values for different biofilter materials vary significantly, measurement of the pH for the mixture of different combinations of biofilter materials is necessary. Based on the types and brands of media, the measured pH ranged from 5.38 to 9.10. The range of measured pH of different mixtures with perlite, compost, saw dust, peat moss, limestone, vermiculite was 7.05 to 8.62.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.10a
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• pp.451-456
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• 1997

Temperature distribution measurements in the mockup apparatus of reactor vessel were performed to determine the effective thermal conductivity of porous media with different geometry and to obtain the experimental data for the heat transfer processes by natural convection occurring in the air duct. The temperature distributions at four separated sections with different arrangements of porous media have different slopes according to the geometrical configuration. From the measured temperature distribution, effective thermal conductivity have been derived using the least square fitting method. The test at air duct was performed to the high heat removal at 3.4kW/$m^2$ by the natural convection from the outer wall to the air. And also the temperature distributions in the air duct agree well with the 1/7th power-law turbulent temperature distribution. The obtained heat transfer data have been compared with the Shin's and Sieger's correlations.

• Asian-Australasian Journal of Animal Sciences
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• v.19 no.1
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• pp.119-125
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• 2006

The present study including two experiments was designed to determine the effect of media containing different rare earth elements (REE) on proliferation and fatty acids accumulation in 3T3-L1 cell cultures. In Experiment 1, 3T3-L1 preadipocytes in 96-well plates ($1.5{\times}10^4cells/ml$) were cultured with Dulbecco's modified Eagle's medium (DMEM) containing 10% fetal bovine serum (FBS) for 24 h. Then the media were changed to the following 10 different media for 48 h: DMEM containing 10% FBS for the control; the above media containing $5{\mu}M$, $10{\mu}M$ or $15{\mu}M$ of $LaCl_3$, $CeCl_3$ or the mixture of these REE chlorides. The proliferation rate of the cells was measured and compared by a non-isotope method-XTT method. In Experiment 2 the cells in 24-well plates ($1.5{\times}10^4cells/ml$) were cultured in DMEM containing 10% FBS for 7 days until confluent and then were changed to above DMEM containing dexamethasone, methyl-isobutylxanthine and insulin (DMI) for two days. Afterwards the media were changed to the 10 different media with REE supplements as in Experiment 1 and cultured for 6 days. The cells were then harvested for fatty acids analysis by gas chromatography. It was found that supplementation of La (5, 10 and $15{\mu}M$), Ce ($5{\mu}M$ and $15{\mu}M$) and the mixture REE (5, 10 and $15{\mu}M$) stimulated (p<0.05) the proliferation of 3T3-L1 preadipocytes (Experiment 1). In the differentiating 3T3-L1 cells supplementation of La ($5{\mu}M$ and $10{\mu}M$), Ce ($5{\mu}M$) and the mixture REE ($5{\mu}M$ and $15{\mu}M$) decreased (p<0.05) the concentration of monounsaturated fatty acids (MUFA) per $10^5cells$, while the supplementation of La ($5{\mu}M$), Ce ($5{\mu}M$) and the mixture REE ($15{\mu}M$) increased (p<0.05) the ratio of saturated fatty acids (SFA) to MUFA. These results indicate that the supplementation of REE to the media may affect proliferation, differentiation and lipogenesis rates of 3T3-L1 cells. However, the effect may depend upon the level or type of REE applied.

• Clinical and Experimental Reproductive Medicine
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• v.19 no.2
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• pp.125-131
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• 1992

The possible effect of human follicular fluid(hFF) on the growth and development of fertilized oocytes and embryos is important because the fallopian tubes are exposed to FF after follicular rupture and the processes of fertilization and embryo cleavage occur inside the fallopian tubes. Previously, it was suggested that human FF might adversely affect on the development of early mouse embryos. In order to investigate the effect of hFF on the development of embryos, early mouse embryos were cultured in media containing various protein sources as bovine serum albumin(BSA), fetal cord serum(FCS) and FF. And we evaluated the development of early mouse embryos in terms of the morphology, cleavage rate, and cell count of blastcysts. There were no significant differences in the morula and blstocyst formation rates of 2-cell mouse embryos cultured in the media containg three different protein sources and three different concentrations of FF. The blastocyst formation rate of 1-cell mouse embryo cultured in FF group was significantly higher than that cultured in BSA group(P<0.05). The morula and blastocyst formation rates of 2-cell mouse embryos of the group cultured in the media containing FF were comparable with those of other two groups, in addition, the cell count of blastocysts of FF group in the 2-cell embryo culture was higher than those of BSA group and HCS group(P<0.01), and this finding was also noted in 1-cell embryo culture. There was no difference in the morula and blastocyst formation rates of the 2-cell mouse embryos cultured in the media containing different concentrations of FF. These results suggest that mature human follicular fluid has no inhibitory activity on the development of early mouse embryos even in high concentration and may be a good protein source which is positively associated with the development of mouse embryos in vitro especially in 1 cell embryo culture.

• Korean Journal of Optics and Photonics
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• v.20 no.2
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• pp.87-93
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• 2009

Variation of the observer's viewing position is one of the major causes of image space distortion in the stereoscopic display. Especially, a large image distortion, which is caused by different depth direction positions of the observer's two eyes, is made by the observer's rotation movement in relation to the center of the screen. This is different from distortion of horizontal and depth directional movement of the observer. In this paper, we analyzed distortion of the image space due to the observer's rotation movement and showed the corrected result of distortion through simulation in the stereoscopic display. Finally, we showed that the distortion shape of the observer's rotation movement is different from horizontal and depth directional movement of the observer.

• Journal of Arbitration Studies
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• v.31 no.4
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• pp.71-97
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• 2021

The meaning of the amendment to the Media Arbitration Act in our society is not limited to media companies. And it's not just a problem for a specific group. It expresses public value because it is an issue that can affect members of society as a whole and furthermore, it becomes a bill that can infringe or strengthen individual freedom guaranteed by the Constitution, but makes different arguments. Freedom of speech is not achieved in a day and should not be easily lost by someone. Although it is not a frequent problem, fatal threats arising from wrong media reports take away an individual's present and future. It is because of this problem that the responsibility is important. Freedom of speech and control are heading in different directions, but they are the same as the front and back of the coin. The freedom pursued is different, but it consists of one body. If freedom and responsibility of speech made up of one body criticize or ignore each other, the results are scattered into a distorted On the other hand, the flexion of responsibility without freedom serves as a speaker that conveys the ideology of some classes or represents the interests of a particular group. The fact that the media should act as the air of society means that it should represent the interests of the majority, make them aware of the rights of unfair or marginalized members, and be their strength.

• Journal of Digital Convergence
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• v.13 no.10
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• pp.195-207
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• 2015

Social media marketing should be approached in a different way from traditional media marketing. This study uses a theoritical and empirical method to analyze what impact social media's key elements - provide information, interactivity and playfulness - have on corporate performance and awareness. As a result, the increase in the level of provide information, and the level of interactivity turned out to have positive impact on corporate performance and awareness. To improve the impact of social media on corporate performance, it is better to use it more extensively for customer management and marketing, rather than simply focusing on a specific part of social media. In conclusion, it is important to have a better understanding of the key elements of social media in order to improve corporate performance and image. In a situation where senior firms are increasingly adopting social media, it is increasingly important to have social media-related PR marketing subject included in senior education.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.18 no.4
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• pp.1-14
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• 2015

A manipulation of zoysiagrass's lateral stems and soil-media; used for slope revegetation, is expected to facilitate the production of high-quality grass. To study the influences on the growth of zoysiagrass depending upon various soil-media conditions, two different types of soil are used. The results obtained - through investigation of its cover rates, leaf color and number - are summarized as follows. In mountain regions soil, there are no significant differences in growth and development of grass in treatments: zoysiagrass's lateral stems treatments with 1cm, 2cm, and 3cm soil-media and treatment with only seeding. Zoysiagrass, in most of the treatments, show about the same growth rates, and at the end, fair visual quality. Zoysiagrass's lateral stems treatments with 2cm, 3cm show slightly better growth, however, thickness of soil-media need not be more than 1cm to obtain an expected quality of lawn. In decomposed granite soil, there appears statistical significance in growth of the grass in treatments: zoysiagrass's lateral stems treatments with 1cm, 2cm, and 3cm soil-media and treatment with only seeding. The thicker the soil-media, the better the growth of grass, and that in treatment with seeding-only shows poor quality in general. And therefore, it is efficacious to plant in 3cm soil-media when quick formation of lawn is necessary; however, using 2cm soil-media is ultimately the most cost-efficient way of formation. But, when time allows - that is, more than three months - 1cm soil-media in decomposed granite soil is reasonable to formate just as effective lawn. And so when performing seeding, additional covering, fertilization or increasing the quantity of seed must be considered.

• Journal of Information Processing Systems
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• v.10 no.1
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• pp.1-22
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• 2014

Recent technological advances provide the opportunity to use large amounts of multimedia data from a multitude of sensors with different modalities (e.g., video, text) for the detection and characterization of criminal activity. Their integration can compensate for sensor and modality deficiencies by using data from other available sensors and modalities. However, building such an integrated system at the scale of neighborhood and cities is challenging due to the large amount of data to be considered and the need to ensure a short response time to potential criminal activity. In this paper, we present a system that enables multi-modal data collection at scale and automates the detection of events of interest for the surveillance and reconnaissance of criminal activity. The proposed system showcases novel analytical tools that fuse multimedia data streams to automatically detect and identify specific criminal events and activities. More specifically, the system detects and analyzes series of incidents (an incident is an occurrence or artifact relevant to a criminal activity extracted from a single media stream) in the spatiotemporal domain to extract events (actual instances of criminal events) while cross-referencing multimodal media streams and incidents in time and space to provide a comprehensive view to a human operator while avoiding information overload. We present several case studies that demonstrate how the proposed system can provide law enforcement personnel with forensic and real time tools to identify and track potential criminal activity.

• Human Ecology Research
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• v.60 no.1
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• pp.115-130
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• 2022

This study aimed to understand what factors the mothers of infants consider to be important when choosing screen media programs for their children, and to investigate whether those features differ according to maternal socio-demographic characteristics (i.e., age, education level, employment status, and family income). The study participants comprised 948 mothers who were the primary caregivers and had at least one child aged 4-6. They were asked to select three of the following aspects as critical criteria for determining if a given screen media program is appropriate for infants: (a) contents suitable to the child's developmental level, (b) behaviors of characters, (c) appearance of characters, (d) visual aspects of program, (e) duration of screen media program, (f) whether the screen media program includes instructive contents, and (g) whether the program leads to opportunities for conversations among family members and activities with children. Multiple response frequency analysis and multiple response cross-analysis were used to analyze the mothers' responses. The results revealed that the majority of the mothers reported that 'contents suitable to the child's developmental level' represented the first-ranked criterion for selecting screen media programs for their child, which was followed by 'behaviors of characters,' and 'whether the screen media program includes instructive contents.' However, such criteria for screen media programs for infants differed according to maternal age, education level, employment status, and family income. These outcomes suggest that different information needs to be provided based on maternal characteristics in order to help mothers determine the quality of screen media programs for their infants.