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박종근,이정준,Park, Jong-Geun,Lee, Jung-Joon 한국조류학회(藻類) 2005 ALGAE Vol.20 No.3
Temporal variability in lake phytoplankton is controlled by a complex between hydrological and chemical factors, and biological interactions. We explored annual change of phytoplankton in Lake Daecheong, using phytoplankton analysis data from 1997 to 2002 (except 2000). The standing crop of phytoplankton was ranged from 3.5 x 10 to 1.5 x 106 cells mL$^{-1}$ and the highest mean value was at site 1. The class composition ratios of phytoplankton standing crop were divided into three classes. From January to March, diatoms showed a dominance (68.1-77.7%). From April to June, diatoms were mixed with cryptomonad etc. or blue-green algae. From July to October, blue-green algae showed a dominance (54.7-84.0%). In the case of green algae, the class composition ratios were below 10%. But green algae appeared all the year round.
박종근,김연숙,이정준,장성현,이정호,Park, Jong-Geun,Kim, Yeoun-Suk,Lee, Jung-Jun,Jang, Sung-Hyun,Lee, Jung-Ho 한국조류학회(藻類) 2006 ALGAE Vol.21 No.1
Cyanobacteria regulate their buoyancy in response to changing environmental conditions. This process is essential for cyanobacterial development and can account for their dominance in eutrophic waters in summer. The present investigation was conducted to understand the 24-hour vertical distribution of cyanobacteria and water quality characteristics in Lake Daecheong. Water samples were collected and analyzed at depth intervals of 2 or 3 m and at an interval of three hours for a day on August 28, 2001 and September 24, 2002. In 2001 the accumulated standing crop of Microcystis spp. from surface to a depth of 6 m was 94.9%. Microcystis spp. showed no vertical migration below the thermocline. Microcystis spp. had maximum density near the surface, but shifted to 2 m depth at 2 p.m. A dense population of Anabaena spp. accumulated near the surface from 2 to 5 p.m. in 2002.
박종근 ( Jong-geun Park ),안창원 ( Chang-won Ahn ),우영춘 ( Young-choon Woo ),최훈 ( Hoon Choi ) 한국정보처리학회 2007 한국정보처리학회 학술대회논문집 Vol.14 No.1
이기종의 다양한 컴퓨터 시스템과 네트워크 장비 그리고 소프트웨어가 서로 혼재되어 있는 오늘날의 IT 환경을 효과적으로 관리하기 어려워짐에 따라 기업은 막대한 총 소유비용을 지출하고 있다. 이러한 상황을 효과적으로 대처하기 위하여, 분산 이기종 환경에서 플랫폼 독립적인 동시에 기술 중립적인 방법으로 시스템 자원을 감시, 통제, 조정하기 위한 표준 기술이 DMTF 를 중심으로 활발하게 개발되고 있다. 본 논문에서는 소형 단말기를 포함한 수많은 정보기기가 모두 네트워크로 연결되는 유비쿼터스 환경에서의 표준화된 시스템 관리를 가능케 하는 경량 CIM 서버가 가져야 할 요구사항을 도출하기 위해 현재 가장 대표적인 CIM 서버 솔루션을 중심으로 그 특징을 분석한다.