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언어 지향적 모델을 이용한 프로토콜 표현 기법의 비교 연구
나정은(Jeong Eun Na),송주석(Joo Seok Song) 한국정보과학회 1989 한국정보과학회 학술발표논문집 Vol.16 No.2
형식적 표현은 프로토콜의 명세와 분석을 위하여, 컴퓨터 네트워크나 데이타 통신에 관심있는 여러 사람들에 의해 수년간 연구되어 왔다. 본 논문에서는 형식적 표현 방법중 언어 지향적 모델을 택하여, 6가지 모델링 기법 -- Temporal Logic, LOTOS. Estelle, CSP. Prolog, Concurrent Pascal -- 을 살펴보고, 표현 방법이나 명세서의 차이점, 그들이 가지는 특징들을 비교, 고찰해 보고자 한다.
나정은 ( Jeong Eun Na ),이학영 ( Hak Young Lee ) 한국환경생물학회 2011 환경생물 : 환경생물학회지 Vol.29 No.1
Distributional patterns of benthic microalgae were studied in the tidal flats of Saemangeum lake, Korea, from March 2007 to October 2009. As benthic microalgae of tidal flats of Saemangeum lake, 44 species belong to 5 classes were identified. Diatoms predominated the benthic microalgal flora with 75.0% of total species occurred. Dominant species were Achnanthes lanceolata, Aulacoseira granulata, Cymbella tumida, Fragilaria construens var. ventor, Melosira varians, Navicula cryptocephala, Navicula cryptocephala var. veneta, Nitzschia palea, and Paralia sulcata. The cell density and biomass of benthic microalgae were highest in 2009, and clear tendency of increment was observed at D1 and D2 sites. In vertical profiles, cell density and biomass of the benthic microalgae showed maximum cells and biomass at 0~1 mm depth of sediments from all sampled sites.
영산강,섬진강 수계 호소의 규모에 따른 식물플랑크톤 분포
나정은 ( Jeong Eun Na ),정명화 ( Myoung Hwa Jung ),박종환 ( Jong Hwan Park ),김상돈 ( Sang Don Kim ),임병진 ( Byung Jin Lim ),김현우 ( Hyun Woo Kim ),이학영 ( Hak Young Lee ) 한국환경생물학회 2011 환경생물 : 환경생물학회지 Vol.29 No.2
The relationships between the phytoplankton community and sizes of reservoirs are investigated from 29 reservoirs in Yeongsan and Seomjin River Basins, Korea. As a microalgal flora, a total of 371 species of phytoplankton were identified. There were spatial and seasonal variations in standing crops and species diversity of phytoplankton. Statistical analysis showed that the size of reservoirs did not affect greatly on the community of phytoplankton. Species diversity and standing crops were higher in reservoirs of smaller surface area. However, there were no distinctive relationships between the size of basins of reservoirs and standing crops, species diversity, and chlorophyll a concentrations. Relationships between the constructed years of reservoirs and standing crops, species diversity, and chlorophyll a concentrations also showed very low level.
나정은 ( Jeong Eun Na ),정명화 ( Myoung Hwa Jung ),조인숙 ( In Sook Cho ),박종환 ( Jong Hwan Park ),황경섭 ( Kyung Sub Hwang ),송효정 ( Hyo Jeong Song ),임병진 ( Byung Jin Lim ),라긍환 ( Geung Hwan La ),김현우 ( Hyun Woo Kim ) 한국환경생물학회 2012 환경생물 : 환경생물학회지 Vol.30 No.1
Abstract - The distributions of phytoplankton community are investigated from 29 reservoirs in Yeongsan and Seomjin River Basins, Korea. As a microalgal flora, a total of 424 species of phytoplankton were identified. They were 157 Chlorophyceae, 161 Bacillariophyceae, 39 Cyanophyceae, and 67 other algal taxa. The phytoplankton diversity were low in stream type reservoirs such as Kumho, Youngsan and Youngam Reservoirs. The population density of phytoplankton ranged from 29 cells mL-1 to 53,161 cells mL-1. The dominant phytoplankton species more than 20% of total standing crops were Asterionella formosa, Aulacoseira ambigua, Aulacoseira distans, Aulacoseira granulata, Cyclotella sp., Synedra acus, Coelastrum reticulatum, Pandorina morum, Scenedesmus arcuatus, Aphanothece clathrata, Microcystis aeruginosa, Phormidium sp. The concentration of chlorophyll a ranged from 0.41 mg m-3~220.72 mg m-3, and showed highest concentration in Gaecho-je. The concentrations of TN and TP have no clear relationships with chlorophyll a concentrations.
정은정 ( Eun Jeong Jeong ),나정은 ( Jeong Eun Na ),김규만 ( Gyu Man Kim ),심성순 ( Sung Sun Shim ),이학영 ( Hak Young Lee ) 한국환경생물학회 2010 환경생물 : 환경생물학회지 Vol.28 No.2
In order to clarify the ecological properties of phytoplankton community, the distribution of phytoplankton and the relation of water temperature and size-fractionation measurements were studied from November 2004 to August 2005 in Youngsan River, Korea. A total of 265 phytoplankton species was identified. It consists of 48 genera and 123 species (46%) of Chlorophyceae, 27 genera and 89 species (34%) of Bacillariophyceae, 12 genera and 25 species (9%) of Cyanophyceae, respectively. From size fractionation analysis, nanophytoplankton (2~20 μm) dominated from early spring to early summer, and microphytoplankton (20~200 μm) from summer to winter. The relationship between chl-α and nanophytoplankton showed high correlation coefficient value (r2=0.93) from Najudaegyo site. The correlation coefficient values between water temperature and nanophytoplankton were low except Dongkangdaegyo site which showed high value (r2=0.73).
보 건설 이후 영산강 보 구간에서의 질소계열 영양염류 및 식물플랑크톤 동태
서경애 ( Kyung-ae Seo ),나정은 ( Jeong-eun Na ),류희성 ( Hui-seong Ryu ),김경현 ( Kyunghyun Kim ) 한국물환경학회(구 한국수질보전학회) 2018 한국물환경학회지 Vol.34 No.4
Insomuch as it is important to manage water quality, from the perspective of water management, it is essential to understand the effect of the weirs on water quality and phytoplankton dynamics in various regions. The purpose of this study is to investigate the characteristics of nitro-nutrients, as well as occurrences and succession patterns of phytoplankton, in the river sections of the two weirs in the Yeongsan River for the five years (from 2012 to 2016) after the weir construction. In respect to this data, the average water temperature measured at the representative point in the section of the Seungchon Weir (17.1 °C) was higher than that of the Juksan Weir (16.6 °C) by comparison. By way of an analysis of this data, it was found that the water quality variables such as, organic matter, nitrogen nutrients and phosphorus nutrients were improved gradually during the period, but the degree of the improvement differs as noted and measured between the weirs. Under the circumstances, it is especially noted that the NH3-N concentration was higher for the point of the Seungchon Weir (2.204 mg/L) than that of the Juksan Weir (1.157 mg/L). This indicates that effluent as seen from sewage treatment plants and hydrological feature near the densely population area, could be the main cause for the incidence of water pollution in the upstream section of the Seungchon Weir. Additionally, the phytoplankton analysis showed that a relative abundance of diatoms and green algae were 56.9 % and 25.8 % respectively. However, it is noted that the cyanobacteria was measured lower as 10.7 %. Also, in the study sites cell density and occurrence frequency of cyanobacteria were relatively lower than compared to the same measurements noted in other rivers.
국내 남서부지역 호수 및 저수지 생태계의 플랑크톤 동태 변화
김현우 ( Hyun Woo Kim ),라긍환 ( Geung Hwan La ),정광석 ( Kwang Seuk Jeong ),박종환 ( Jong Hwan Park ),허유정 ( Yu Jung Huh ),김상돈 ( Sang Don Kim ),나정은 ( Jeong Eun Na ),정명화 ( Myoung Hwa Jung ),이학영 ( Hak Young Lee ) 한국환경생물학회 2010 환경생물 : 환경생물학회지 Vol.28 No.2
This study compares and contrasts the dynamics of plankton in 31 temperate lakes and reservoirs, and considers particularly the biomass ratio of zooplankton to phytoplankton and ecological model application. A total of 89 species of zooplankton were identified (70 rotifers, 14 cladocerans and 5 copepods) and a total of 554 species of phytoplankton were identified (176 Bacillariophyceae, 237 Chlorophyceae, 68 Cyanophyceae, and 73 other algal taxa). The total plankton abundance and species diversity were showed distinctive spatial and seasonal variation. Annual average phytoplankton density was 7,350±15,592 cells mL-1 (n=124), and the lowest was 855±448 cells mL-1 (n=4), while the highest was 72,048±13,4631 cells mL-1 (n=4). For zooplankton, small rotifer groups dominated the study sites, and approximately 3~10 species appeared in the study sites. Statistical analysis and an ecological model application revealed that the size of reservoirs affected the structure size of plankton community, i.e. relatively large number of species were found in smaller reservoirs. From this result, we can conclude that management strategy for the reservoir environment has to be focused more on small-size reservoirs, in terms of plankton community ecology.