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Microplastics in food containers and biological samples
Jaehak Jung(정재학) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
Humans, who have been benefiting from plastics for a long time, will finally face the counterattack of plastics as they experience the COVID-19 Pandemic. Various masks and disposable food packaging used exceeded the processing capacity of each country. Eventually, various untreated plastics flow into the sea along the river, become secondary microplastics, and eventually become contaminated with various aquatic organisms. It will come up to the table. Even the soil was contaminated for a long time due to agricultural seeds and fertilizers that were used by making micro-encapsulated microplastics, and as a result, root plants (carrots, etc.) and fruits (apples, etc.). The discovery of microplastics in the size of microns shows that the world is contaminated with microplastics in a very wide range. Since 2018, KIAST which has been leading the microplastics testing service and standardization for the first time in Korea, has recently been providing testing services for food containers such as tea bags, paper cups, baby feeding bottles, and various seafood. It will be introduced the results of microplastics analysis on oysters samples in Korea and the intestines of dead penguins collected at the King George Island in the Antarctic. Among biological samples, microplastics testing is the most difficult, and it is a field that requires a lot of technology development in the future, and a lot of research is needed for human risk assessment, so it is a situation that requires great interest and collaboration among global researchers.
IEC 62321 국제표준화의 Projector Leader 수임에 의한 국가 경쟁력 강화
김재우(Kim Jae Woo),정재학(Jung Jaehak),이성익(Lee Seong-Ik),최은경(Choe Eun Kyung),명영찬(Myoung Young Chan),정남용(Cheong Nam-Yong) 표준인증안전학회 2012 표준인증안전학회지 Vol.2 No.2
Many electrical and electronic companies are realizing that they need to be able to identify materials containing hazardous substances. Thus, TC 111 working group 3 that developed test methods of hazardous substances was organized in the IEC. Korea has contributed to WG 3 by dispatching around 10 Korean experts since 2008. Particularly, NWIP(New Work Item Proposal) on the test method of phthalates that has been recently an issue in the international environmental regulation was proposed by Korean experts of WG 3 and approved officially by IEC TC 111 WG 3. As such the standardization of phthalates is now in progress and is expected to be published officially as international standard, IEC 62321-8 in 2015. Another successful example where Korean expert took on responsibility as a project leader is standardization of IEC 62321-3-2 by developing screening method for total bromine. In this paper, detailed processes of standardization of IEC62321-3-2 and IEC62321-8 under Korea s leadership will be reported with resulting positive effects of Korea national committee s aggressive participation in international standardization.
질의어 패턴 자동분석을 통한 커뮤니티 기반 개인화 검색 (pp.37-38)
박건우(Gunwoo Park),정재학(Jaehak Jung),이상훈(Sanghoon Lee) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1
기존의 웹 검색 엔진들은 사용자의 검색 의도를 충분히 반영하지 못하기 때문에 개인이 원하는 정보를 보다 정확하게 제공 할 수 없는 단점을 가지고 있다. 따라서 개인의 특성을 이해하고 검색에 반영함으로써 보다 정확한 개인화 검색 서비스를 제공하기 위한 많은 연구들이 진행되고 있다. 이러한 개인화된 검색 서비스를 통해, 사용자는 방대한 웹상의 정보를 보다 효율적으로 검색하여 자신에게 적합한 정보를 편리하게 획득 할 수 있으며 짧은 시간에 정확한 정보 획득을 보장 받을 수 있다. 본 논문에서는 개인의 질의어 패턴을 자동으로 분석하고 상위에 순위화 된 질의어 유형에 따라 주요 관심사 별 커뮤니티를 형성하여 검색에 반영함으로써 개인의 정보요구에 보다 근접한 개인화 검색 방안을 제안한다.