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경기도 지역 농경지의 천부 지하수 내 질산염 오염특성과 변화
이은재,우남칠,이병선,김양빈,Lee, Eun-Jae,Woo, Nam-Chil,Lee, Byung-Sun,Kim, Yang-Bin 대한자원환경지질학회 2008 자원환경지질 Vol.41 No.4
Hydrogeochemistry of groundwater was studied in order to identify the influence of cow manure, distributed to a farmland as organic fertilizer, on nitrate concentrations in shallow groundwater and its spatio-temporal variations. From monitoring wells, water levels were measured using automatic data loggers, and water samples collected and analyzed in Feb., April, June and Oct. 2007. The average electric conductivity and concentration of nitrate in the groundwater show the highest levels in April and decline in subsequent sampling times. Decreases in dissolved oxygen(DO) and nitrate concentrations from April to Oct. and corresponding increases in $HCO_3$ concentrations indicate denitrification processes by microorganisms. Spatial variation of nitrate concentration appeared to be affected by the redox conditions of groundwater controlled by geochemical reactions of Mn, Fe and DOC contents.
광대역 무선 네트워크에서 멀티미디어 스트리밍 서비스를 위한 혼잡 제어 기법
이은재,정광수,Lee, Eun-Jae,Chung, Kwang-Sue 한국정보통신학회 2013 한국정보통신학회논문지 Vol.17 No.11
It is difficult for TCP congestion control algorithm to ensure the bandwidth and delay bound required for media streaming services in broadband wireless network environments. In this paper, we propose the COIN TCP (COncave INcrease TCP) scheme for providing a high-quality media streaming services. The COIN TCP concavely increases the congestion window size by adjusting the increment rate of congestion window, that is inversely proportional to the amount of data accumulated in the router queue. As a result, our scheme can quickly occupy the available bandwidth and prevent the heavy congestion. It also improves the link utilization by adjusting the decrement rate of congestion window according to the packet loss rate with the random loss. Through the simulation results, we prove that our scheme improves the total throughput in broadband wireless network.
이은재,심완섭,Lee, Eun-Jae,Sim, Wan-Seop 한국데이터베이스진흥원 2002 디지털콘텐츠 Vol.7 No.-
본고는 국제 e-비즈니스학회 춘계 정책포럼에서 발표된 것으로 'AIO로 본 모티즌의 유형과 특징'에 대해 연구한 보고서이다. 무선인터넷 붐이 장밋빛 환상으로 끝나지 않기를 바라며, 모티즌에 대한 연구로 마케팅 전략에 이정표를 제시해주고 있다.
인터넷쇼핑몰 B2C 거래자의 라이프스타일 유형과 고객만족에 관한 연구
이은재(Lee, Eun-Jae),심완섭(Shim, Wan-Seop) 한국통상정보학회 2002 통상정보연구 Vol.4 No.1
본 연구는 인터넷쇼핑몰 B2C 거래자의 라이프스타일과 고객만족의 관계를 알아보려는 의도로 설문지 측정도구를 이용하였으며 선행연구와 실증분석을 시행하였다. 인터넷쇼핑몰 고객만족은 어떠한 인지적인 상황이나 태도에서 나아가 사후 행동과 연관지어 생각한다면 제품에 대한 재구매나 높은 애호도, 호의적인 구매행위 등의 결정하는 원인으로 나타나기 때문에 인터넷쇼핑몰 관리자에게 B2C 거래의 성공적으로 이끌기 위한 필요한 마케팅정보를 제공할 수 있다. 분석결과 라이프스타일 유형중에서 열광매니아형이 고객만족에 긍정적으로 나타났다. 이러한 결과는 인터넷쇼핑몰에서 구매한 사이버소비자 집단의 구성원의 생활의식과 행동에 어떤 영향을 미치고 그 결과로 라이프스타일과 소비자행동의 관계를 파악해 줌으로써 체계적인 시장세분화에 접근할 수 있는 프레임웍(framework)을 제공해 줄 것이다.
산불피해 후 자연복원과 소나무 조림을 실시한 지역에서 설치류 3종의 개체군 밀도 차이
이은재 ( Eun Jae Lee ),손승훈 ( Seung Hun Son ),이우신 ( Woo Shin Lee ),어수형 ( Soo Hyung Eo ),임신재 ( Shin Jae Rhim ) 한국산림과학회 2010 한국산림과학회지 Vol.99 No.4
This study was conducted to clarify the differences in rodents population densities between natural restored and red pine silvicultured forests after forest tire in Samcheok, Gangwon Province, Korea from March to December 2008. One ha size of 3 study plots were set up in each natural restored and silvicultured stand. We trapped the small rodents during 4 consecutive nights every 2 months in each stand. Understory coverage and number of shrub stems were higher in silvicultured stand than in natural restored stand. Coverage of overstory, suboverstory and midstory, number of tree stem, woody seedling stems and dead wood, and amount of coarse woody debris were higher in natural restored stand than in silvicultured stand. Six hundred eighty eight individuals of four species, such as Apodemus agrarius, A. peninsulae, Eothenomys regulus and Tamias sibiricus were captured in our study. Number of captured small rodents were higher in natural restored stand than in silvicultured stand. Also, species compositions were differed in both stands. The captured number of A. agrarius and A. peninslllae were most highest in April and December. E. reglilus were shown higher number of captured in April and June, and r sibiricus were in June and October. Removal of coarse woody debris and silvicultural practice would not be good for the inhabitation of small rodents. For the conservation of small rodents diversity, management of understory and canopy would be needed in forest fired area.
한국무역보험공사의 중소 조선 산업에 대한 보증제도 운영지원과정상의 문제점과 정책시사점
이은재(Eun-Jae Lee) 한국통상정보학회 2012 통상정보연구 Vol.14 No.4
본 논문은 글로벌금융위기시기 정부의 정책의지에 따라 운영될 수 밖 에 없었던 정책금융지원기관으로서, 공적수출신용보증기관 무보가 중소조선기업 보증지원 시 운영상의 문제점을 개선할 수 있도록 방안을 제시하다. 그러므로 본 연구는 기존연구와는 달리 중소조선사를 대표하는 S조선 지원 사례를 서지(書誌)분석을 통하여, 무보의 선박수출보증보험운영상의 불합리한 규정의 개선 뿐 만아니라 무보의 중소조선사 총괄 보증제도 까지 연구범위를 확대하여, 무보의 선박수출보증제도의 운영상의 문제점 및 시사점 뿐 만 아니라 경제위기상황에서 정부의 정책적 오류 발생 및 이와 연관된 정책집행기구의 역할에 대한 정책적 시사점을 제시하였다. We have more risks in international trade market than in the domestic business market because economic activities are going on with business transactions in different countries. K-sure’s Refund Guarantee System is the most important system for Korean Small and Middle Shipbuilding Industries’ business, but Korean exporters of Shipbuilding Industries are more interested in export financing through K-sure rather than its financial supporting services. The export insurance becomes more important service for international trade business and it its count as the only one indirect way of supporting export business because export insurance is accepted internationally under the WTO system. Also, it is the only measure that can cover emergency risk, credit risk, exchange risk which cannot be covered by private insurance. As the major risk manager for Korean exporters, the K-sure needs to provide an integrated risk management service for customers. Korean exporters can take more challenges in ever competitive international trade market and we can witness promotion of export in the future which is essential to Korea’s economic growth.