• Journal of Animal Environmental Science
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• v.16 no.3
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• pp.167-174
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• 2010

This study was performed to evaluate the removal effects of nutritive salts and organic pollutants in experimental aeration reactor for treatment of piggery slurry. In this study, three types of reactors were manufactured and operated. The fibrous media was equipped in one of three reactors. Another reactor was equipped with the siliceous media and the other reactor used as a control was equipped with typical aeration system only. Treatment efficacy of three types of reactors were evaluated according to the pollutants removal rate of the piggery slurry. The results obtained in this study are as follows : 1) In the reactor containing fibrous media, the removal efficiency of BOD, T-N and T-P was 11%, 13.9% and 21.2%, respectively. 2) In the reactor containing siliceous media, the removal efficiency of BOD, T-N and T-P was 6.9%, 25.3% and 47.8%, respectively. 3) In the reactor not containing media, the removal efficiency of BOD. T-N and T-P was 6.1%, 8.1.% and 23.6%, respectively. 4) Sludge accumulation in the reactor equipped with filamentous media was lower than that of other experimental reactors.

• The Korean Journal of Mycology
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• v.44 no.2
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• pp.100-102
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• 2016

Ergothioneine is a natural compound with strong antioxidant properties. In this study, the effects of different nitrogen sources including ammonium nitrate, ammonium sulfate, sodium nitrate, and histidine in sawdust media were investigated to enhance ergothioneine contents in Shiitake (Lentinula edodes) fruit bodies. The addition of 0.2% ammonium sulfate in the growth media showed the highest enhancement of ergothioneine content in shiitake fruit bodies which was 1.7-fold higher than the control. On the other hand, histidine, a building block of ergothioneine decreased the concentration of ergothioneine significantly. Our results demonstrate that the cultivation of shiitake in sawdust media with suitable nutrients was effective to enhance its ergothioneine contents.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.598-600
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• 2005

본 논문에서는 터치스크린을 사용한 디지털보드게임에서 사용자에게 게임의 전락 정보 제공을 통해 게임의 습득 속도를 증가시켜 줄 수 있는 PGA(Portable game assistant)를 제안한다. 기존의 디지털보드게임은 모든 게이머를 위한 공동영역과 개인만을 위한 개인영역으로 나눈다. 공동영역에서는 모든 사용자가 알아야 하는 게임환경과 도움말을 제공하고, 개인영역에서는 게임 진행에 필요한 게임화면과 말의 정보를 제공한다. 우리는 공동영역인 게임테이블에서 터치스크린을 사용하여 게임을 진행하고, 개인영역에 게임의 재미를 더 하기 위하여 PGA를 사용하여 게임의 전략을 그래픽으로 제공한다. 우리는 배우기 쉽고 전략적으로 지원이 필요한 장기게임에 제안된 시스템을 적용하였으며, 앞으로 본 시스템에 게임 애니메이션, 사운드 등을 추가하여 다양한 테이블보드게임에 전략적인 측면과 동적인 측면을 함께 제공할 것이다.

• Journal of Korean Library and Information Science Society
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• v.51 no.3
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• pp.223-250
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• 2020

The purpose of this study is to define the concept of media information literacy and to develop educational content. To achieve the purpose of the study, literature analysis, interviews with field experts, and surveys with teacher librarians were conducted. The field experts recognized the media as a tool to use information and recognized information problem-solving skills, reading comprehension ability, media functions, case activities, and affective domain as the areas of media information literacy education. The teacher-librarians thought that information and media literacy which include its competency and educational content are more important than the digital literacy. As a result of the study, the concept of media information literacy was defined as knowledge, skills, and attitudes including the concepts of literacy, media literacy, information literacy, and digital literacy. In addition, educational contents of media information literacy were developed so that 'participation in democratic society', 'classification of media tools and contents', 'basic human rights', 'skills', 'digital tool manipulation' and 'information problem solving process' can be combined and applied in context.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.3
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• pp.987-996
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• 2021

The development of Internet technology can affect firm value through the use of social media by business people. Nowadays, social media affect businesses of all sizes in several different ways. Despite the various benefits obtained by using social media, research at the organizational level and its impact on business performance have not grown as fast as desired. This research aims to examine the effect of social media on oil and gas firms' value. The research sample consists of 9 oil and gas firms listed on the Indonesian Stock Exchange 2013-2018. Social media proxies are firms' social media, other social media mentions, and social media sentiment. Firm value is measured by the market value to assets ratio. Data analysis uses a random-effect regression test. Based on the analysis, the social media account of a firm has a positive effect on firm value. It indicates that social media give advantages for oil and gas firms to give a signal of business prospect, make use of opportunities related to industry alliances, recruit employees globally, and c. On the other hand, the positive sentiment on social media has no effect on oil and gas firms' value.

• Journal of Food Hygiene and Safety
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• v.22 no.4
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• pp.388-394
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• 2007

This study was conducted to evaluate the selective media listed in currently available Food Code in Korea. The 29 different types of media of five different types of foodborne bacteria including Salmonella spp., Bacillus cereus, Listeria monocytogenes, Vibrio parahaemolyticus, Staphylococcus aureus were tested in the broth and food. The recovery test for five different types of foodborne bacteria was performed in the artificially inoculated into chicken, rice, pork and mackerel. There was no significant differences in isolation capabilities among twenty nine different types of isolation selective media for five different types of foodborne bacteria in broth condition, while there was significantly a little differences in isolation capabilities among those on foods (P<0.05). The higher number of foodborne pathogens were isolated from conventional selective media approved in Food Code than newly developed selective media such as chromogenic media. This results suggest that there was differences of selectivities among currently available isolation selective media in many countries and further studies are needed to be approved by Korean Food and Drug Administration.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.5 no.2
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• pp.359-373
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• 2011

Demand for rich media services is rapidly increasing and, as a result, several technologies are competing to deliver rich media services to mobile, resource-constrained devices. In this paper, we explore the existing rich media technologies and analyze their key features. In addition, in order to accommodate the new requirements introduced by emerging service models, such as service convergence, these technologies must evolve from their current status. We examine how the community intends to achieve this.

• Microbiology and Biotechnology Letters
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• v.13 no.1
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• pp.65-70
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• 1985

The production media, partial purification and the enzymatic characteristics of laccase from Pleurotus ostreatus were investigated. Among various media tried the double strength onion media showed much higher production of laccase compared to glucose and/or CMC added media. The laccase from Pleurotus ostreatus has the optimum pH of 5.94 for the activity and appears to be stable at relatively broad pH spectrum (4.7-8.7). The experiments on the temperature stability shows that above 90% activity could be preserved after holding at $30^{\circ}C$ for 40 min., 60% activity was remained after 40 min. at $50^{\circ}C$. The Km value of the laccase from Pleurotus ostreatus was estimated to be 3.209mM and the molecular weight of laccase was estimated to be 55,000 by SDS-Polyacrylamide gel electrophoresis.

• Journal of the Korean Society for Library and Information Science
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• v.39 no.2
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• pp.57-84
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• 2005

The standards for instructional media and equipments imply an essential element for curriculum. In knowledge-based society, school libraries are an educational environment to assist curriculum, offer information literacy and reading services. Therefore the standards for school libraries instructional media and equipments are able to suggest the mission of school library media center, and it should contain suitable elements for educational roles. But the current standards are insufficient from quantitatively as well as qualitatively. So the standards, if standards for instructional media and equipments are revised, should be contain following contents. 1. facilities guidelines: 2. basic equipment plan; 3. instructional media for educational roles; 4. equipments for each essential. area space: 5. more detailed information appliances; 6. improvement of standard for special school library

• Journal of Korea Multimedia Society
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• v.24 no.11
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• pp.1526-1537
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• 2021

Due to the difference between the underwater communication environment and the terrestrial communication environment, the radio communication mainly used on the ground cannot be used in underwater. For this reason, in the underwater communication environment, various communication media such as acoustic waves, infrared rays, light and so on has been studied, but there exist several difficulties in operating them individually due to their physical limitations. The concept for overcoming these difficulties is the very underwater multi-media communication, a method to select a communication medium best suitable for the current underwater environment among underwater communication multimedia whenever there occurs underwater communication failure. In this paper, we present an underwater multi-media communication network based on star topology and a fragmentation and reassembly technique to solve the problems caused by the different MTU (Maximum Transmission Unit) sizes among different underwater communication media. We also present the estimations and analysis on processing times in each of fragmentation and reassembly and the total data amount for transmitting fragments in our proposed underwater multi-media communication network.