• Journal of the Korean Society for Marine Environment & Energy
• /
• v.10 no.4
• /
• pp.201-210
• /
• 2007

Pollution by chemical substances such as POPs, EDCs and PBTs in the ecosystem has become more complex and varied, increasing the possibility of irreversible damage to human health or the ecosystem. It is necessary to have a exposure assessment in a multi-media environment for various chemical substances is required for efficient management. This study applied MUSEM(Multi-media Simplebox-systems Environmental Model), a multimedia environmental model that can simultaneously evaluate the possibility of exposure of hundreds of chemical substances in order to efficiently manage chemical substances that can have negative impact on human health or ecological environment through environmental contamination. MUSEM executed the modeling for Japan by setting all 47 prefectures of japan as the regional area for 62 chemical substances and the rest of the territory of japan, excluding regional area, as the continental area and made the estimation of concentration among environment media in each administrative area and made the sensitivity analysis on Tokyo area. The results of simulation for chemical distribution showed that most of the target chemicals located in water region. The result of sensitivity analysis for octanol-water partition rate showed that the concentration change of soil in urban/industrial area and sediment in freshwater was high. In the case of sensitivity analysis for degradation rate showed that the concentration change of freshwater, soil in urban/industrial area, and sediment in freshwater was high.

• Korean Chemical Engineering Research
• /
• v.56 no.4
• /
• pp.479-495
• /
• 2018

This study was carried out to research the multimedia fate modeling, concentration distribution and impact assessment of polycyclic aromatic hydrocarbons (PAHs) emitted from automobiles, which are known as carcinogenic and mutation chemicals. The amount of emissions of PAHs was determined based on the census data of automobiles at a target S-city and emission factors of PAHs, where multimedia fugacity modeling was conducted by the restriction of PAHs transfer between air-soil at the impervious area. PAHs' Concentrations and their distributions at several environmental media were predicted by multimedia fugacity model (level III). The residual amounts and the distributions of PAHs through mass transfer of PAHs between environment media were used to assess the health risk of PAHs at unsteady state (level IV), where the sensitivity analyses of the model parameter of each variable were conducted based on Monte Carlo simulation. The experimental result at S-city showed that Fluoranthene among PAHs substances are the highest residual concentrations (60%, 53%, 32% and 34%) at all mediums (atmospheric, water, soil, sediment), respectively, where most of the PAHs were highly accumulated in the sediment media (more than 80%). A result of PAHs concentration changes in S-city over the past 34 years identified that PAHs emissions from all environmental media increased from 1983 to 2005 and decreased until 2016, where the emission of heavy-duty vehicle including truck revealed the largest contribution to the automotive emissions of PAHs at all environment media. The PAHs concentrations in soil and water for the last 34 years showed the less value than the legal standards of PAHs, but the PAHs in air exceeded the air quality standards from 1996 to 2016. The result of this study is expected to contribute the effective management and monitoring of toxic chemicals of PAHs at various environment media of Metropolitan city.

• Proceedings of the Korean Society for Information Management Conference
• /
• 1999.08a
• /
• pp.185-188
• /
• 1999

본고에서는 네트웍환경에서의 매체변화와 장서관리의 향후관계에 대해서 분석하였다. 도서관의 주요자원이 인쇄매체에서 전자매체로 변화함에 따라서, 소장과 접근이라는 전통적인 장서관리로는 이용자 중심의 정보제공 기능을 효과적으로 수행하기에 한계가 있음을 지적하고, 물리적이고 형식적인 매체중심의 장서관리에서 다양한 정보매체가 담고 있는 내용중심의 내용관리(content management)로의 패러다임 전환이 필요함을 규명하였다.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.12 no.2
• /
• pp.71-84
• /
• 2001

The purpose of this study is to provide the methods of preservation for paper, microfilm, digital media. First of all, for acidic papers produced in 19~20 centuries, this study evaluates and analyses deterioration and factors causing deterioration. For book, also, environmental condition for preservation, and a preservation mechanism through acid-free procedure were suggested. Second for microfilm, it emphasized physical and chemical properties, oxidised substance during developing film, materials related to preservation. Third, for digital storages, storage conditions and needs, such as life-cycle and capacity were introduced.

• Digital Contents
• /
• no.8 s.123
• /
• pp.106-115
• /
• 2003

'디지털 스토리텔링(Digita0l Storytelling)'이란 디지털 기술을 매체환경 또는 표현 수단으로 수용해 이루어지는 스토리텔링이다. 영화를 비롯한 미디어 영상물은 대개 6단계의 표준 제작 공정으로 만들어진다. 1)기획개발단계(Develop) 2)제작준비단계(Pre-Production)3)제작단계(Production) 4)후반작업단계(Post-Production)5)배급단계(Distribution) 6)상영단계(Exhibition)가 그것이다. 디지털 스토리텔링이란 1)에서 6)에 이르는 매체 환경전체에 디지털 기술이 수용되거나, 최소한 1)에서 4)에 이르는 스토리에서 담화까지의 창작에 표현 수단으로 디지털 기술이 수용된 경우를 말한다.

• Journal of Radiation Protection and Research
• /
• v.40 no.4
• /
• pp.267-276
• /
• 2015

Several analyses on tritium that is the largest release of gas or liquid radioactive waste from domestic PWR and PHWR NPPs were carried out, such as release comparison, directional frequency of wind and tritium behavior changes in environmental samples. First of all, analysis result showed that tritium released from PHWR was more than ten times as gas and double to three times as liquid in comparison to PWR in 2013. Independent release management in NPP units is needed to precisely control and analyze tritium, since there were 2 units of some NPPs having the same amount of release during analysis. In analysis on frequency of wind direction, average range showed 1.7 to 11.5% by 16-point compass. In case of analysis on sampling points by wind direction, Result showed most of the sampling points are right in places. However, There are some areas needed to examine. In analysis on tritium concentration changes in environmental samples, tritium concentration near NPPs was higher than one far away from NPPs. In case of environmental samples far from PWR, a trace of tritium occur. While, tritium concentration near NPPs was more than or equal to one further from PHWR. In conclusion, tritium occurs considerably in PHWR and is lower than standard in samples. but, it is still detected. Therefore, it is needed to strengthen control in system in NPPs and to consistently monitor tritium in environment.

• Proceedings of the Korean Society for Information Management Conference
• /
• 2000.08a
• /
• pp.101-104
• /
• 2000

인터넷과 디지털 환경은 지금까지 운영되어 왔던 학술정보시스템에 대한 재검토를 요구하고 있다. 도서관 운영에 있어서도 새로운 정보환경과 매체의 발전으로 인하여 자료의 수집에서 서비스 정보에 이르기까지 변화된 정보환경에 부합하는 평가모형의 개발을 요하고 있다. 따라서 새로운 정보환경과 매체 변화에 적합한 도서관의 운영과 서비스를 창출하기 위하여 국내외의 평가기준을 분석하여 디지털 환경에 적합한 대학도서관의 평가 항목과 평과 지표를 제안하고자 한다.

• Korean Journal of Environment and Ecology
• /
• v.20 no.2
• /
• pp.143-152
• /
• 2006

The purposes of this study were to provide basic visitor information for effective park management and to understand visitors' perception about the interpretive media which is utilized as a self-guide environmental interpretation in Weolchusan National Park. To accomplish the purposes of study, a questionnaire survey was chosen and the 196 valid samples among them were analyzed. Among who used the interpretive media, the largest proportion used the information board of park use-resources, and the usage rate of interpretive label of woody plant, interpretive sign of cultural asset, and self-guide tour were shown to be relatively high. However, the park brochures(map), bulletin boards, park web sites, LED sign, and visitor center exhibits were evaluated that use efficiency was low. In the analysis of importance-performance, visitors were perceiving the importance of all form of interpretive media greatly. The performance of interpretive media was also evaluated as affirmative.

• The Korean Publising Journal, Monthly
• /
• s.303
• /
• pp.28-28
• /
• 2001

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
• /
• 2003.12a
• /
• pp.585-590
• /
• 2003

무선랜 환경에서는 데이터 링크 레이어의 전달 매체와 물리적 계층이 기존의 유선 네트워크와는 근본적으로 다른 특성을 지닌다. 무선랜 환경에서는 공중망을 전달 매체로 하여 통신이 이루어진다. 그리고 무선랜 환경에서는 단말기들의 이동성에 의해 네트워크 상태가 가변적으로 변하기 때문에, 이러한 환경에서 유선과는 또 다른 보안상의 문제점들을 가지게 된다. 본 논문은 무선 구간에서 유동적으로 발생하는 네트워크의 상태와 정보들을 수집하여 무선 구간에서만 이루어질 수 있는 보안상의 문제점들을 파악하고 대처하는 무선랜 환경에서 상태 정보 수집 에이전트를 설계하고 구현한다.