• 생태와환경
• /
• 제40권4호
• /
• pp.546-552
• /
• 2007

The objectives of this study were to analyze fish compositions, based on trophic guilds and tolerance guilds and determine community characteristics structure at five sampling sites of Yeongsan Lake during July 2006-May 2007. Total number of species sampled was 30 species and the number was 1350. Cyprinidae (77%) and Centrarchidae (15.7%) dominated the community and then followed by Cobitidae(2.7%), Gobiidae(2.4%), Mugilidae (0.5%), and others (0.1%). The relative abundance of tolerant and omnivore species at all sites was 63% and 77% of the total, respectively, suggesting an ecological degradations in the Lake. Exotics species such as large mouth bass (Micropterus salmoides), which is a top-carnivore in the water distributed at all sampling sites, implying that ecological disturbance was severe based on previous reference of US EPA (1991). Also, we found external anomalies such as external deformities, bleeding and tumors and not found migratory fish. Analysis of fish community structure showed that species diversity index and richness index was the highest in Site 1 and the dominance index was the highest in Site 2. In this study, high proportions of tolerant species and omnivore species, widespread exotic species, and frequent observations of abnormal fish. Such problems may be directly or indirectly associated with high nutrient enrichments and the reduced flow velocity by the dam construction. The ecosystem restoration by dam removal or removal of exotic top-carnivore fish may be one of the best strategies for better lak management.

• 한국의류학회지
• /
• 제35권8호
• /
• pp.890-905
• /
• 2011

This study investigated service quality perception, purchase satisfaction, recommendation intention, and switching intention of fashion consumers according to the types of internet shopping malls. The survey was conducted from February 7 to 21 in 2011, and 294 responses were used in the data analysis. The statistical analysis methods were frequency analysis, factor analysis, reliability analysis, ANOVA, and regression analysis. The result of the service quality perception of internet fashion consumers was classified by site characteristics, reliability, enjoyment, product diversity, responsibility, security, and order convenience. There were significant differences in the site characteristics, reliability, enjoyment, responsibility, and security of service quality perception by the types of internet shopping malls. In addition, the factors of service quality perception that could affect the purchase satisfaction of fashion consumers showed differently according to the types of internet shopping malls. The purchase satisfaction of fashion consumers influenced the recommendation intention in all types of internet shopping malls and the purchase satisfaction influenced the switching intention in fashion specialized internet shopping malls.

• ALGAE
• /
• 제26권4호
• /
• pp.333-342
• /
• 2011

Macroalgae are important primary producers in marine ecosystem. They don't only play an important role as bioindicators but also provide economic resources for humans. Seasonal and vertical variations in seaweed species composition and biomass were examined to determine the ecological status of seaweed beds around Udo, near Jeju Island. We obtained samples at two sites in the high-intertidal to subtidal zones using the quadrat method between June 2010 and May 2011. A total of 262 species were collected, including 31 green, 61 brown, and 170 red algae. The composition of algal species revealed a decrease in species growing in cold water in comparison with the list 20 years ago. The macroalgal mean biomass (g wet wt $m^{-2}$) was 3,476 g and 2,393 g from the two sites, respectively. Ecklonia cava had the greatest biomass at both sites. The seasonal dominant species by biomass at site 1 from the low-intertidal to 1-3 m depth of the subtidal zone was mostly comprised of thick-leathery form, such as Sargassum hemiphyllum, S. coreanum, and Ecklonia cava, whereas site 2 was comprised of the turf form, such as Chondrophycus intermedius, Chondracanthus intermedius, Dictyopteris prolifera, and Gelidium elegans. The current ecological status of the seaweed community in Udo is stable based on diversity and dominance indices.

• 가정과삶의질연구
• /
• 제22권6호
• /
• pp.89-97
• /
• 2004

The purpose of this study was to investigate the characteristics of leisure facilities and to examine residents' needs for leisure facilities in apartment complex. The questionnaire survey and content analysis were used. The Data for content analysis were 476 site plans, and the subjects of questionnaire survey were 673 residents lilving in 35 apartment complex. Frequency, Percentage, and mean, ANOVA-A, x^{2}-test, and multiple regression were used for data analysis. The major results were as follows. 1) Facilities for children play, and senior, sports facilities, community center, green area, and resting place were included in leisure facilities in apartment complex. These facilities were different according to complex site and built-period. 2)The degree of satisfaction of leisure facilities was lower than neutral. The satisfaction of leisure facilities related with diversity of leisure facilities and program, and poor environment. 3) Subjects needed the facilities recommended in housing act including diverse leisure facilities such as sports center and resident's self government facilities. And they needed divers facilities for sports. 4) In terms of location, they needed leisure facilities which was closer to their house.

• Journal of Microbiology and Biotechnology
• /
• 제28권8호
• /
• pp.1339-1345
• /
• 2018

2-Keto-3-deoxy-6-phosphogluconate (KDPG) aldolase, which catalyzes aldol cleavage and condensation reactions, has two distinct substrate-binding sites. The substrate-binding mode at the catalytic site and Schiff-base formation have been well studied. However, structural information on the phosphate-binding loop (P-loop) is limited. Zymomonas mobilis KDPG aldolase is one of the aldolases with a wide substrate spectrum. Its structure in complex with the substrate-mimicking 3-phosphoglycerate (3PG) shows that the phosphate moiety of 3PG interacts with the P-loop and a nearby conserved serine residue. 3PG-binding to the P-loop replaces water molecules aligned from the P-loop to the catalytic site, as observed in the apostructure. The extra electron density near the P-loop and comparison with other aldolases suggest the diversity and flexibility of the serine-containing loop among KDPG aldolases. These structural data may help to understand the substrate-binding mode and the broad substrate specificity of the Zymomonas KDPG aldolase.

• 미생물학회지
• /
• 제28권3호
• /
• pp.204-209
• /
• 1990

1987년 9월부터 1988년 8월까지 소양호 4개 정점에서 총 세균수, 종속영양세균수의 분포와 각 종의 alkaline phosphatase의 분비 비율과 활성도를 측정하였다. 총 세균은 $3.2{\times}10^{5}$ - $3.2{\times}10^{6}$ cells/${\mu}\ell$의 범위였으며, 종속 영양세균의 총 세균수는 0.07-2.63%이였다. 종속영양세균의 종 당양성은 여롬과 양어장 인근, Peridinium이 발생하는 곳에서 낮았다. Pseudomonas. Flavobacterium은 모든 정점에서 우점종으로 나타났다. Alkaline phosphatase를 분비하는 비율과 활성도는 Flavobacterium에서 높게 나타나, 유기인산염 분해에 우점세균 중 가장 큰 기여를 하는 것으로 밝혀졌다.

• Journal of Forest and Environmental Science
• /
• 제35권3호
• /
• pp.189-196
• /
• 2019

Plants are consumed by a myriad of organisms that compete for resources. Direct interactions among multiple plant-feeding organisms in a single host can range for each species from positive to negative. Wood-boring beetle faces a number of biotic and abiotic constraints that interfere with the good prospects from the tree. Biotic factors, including arthropod pests and diseases, and abiotic factors, such as drought and water-logging, are the major constraints affecting the species. The present study aimed to provide basic data for analyzing forest health, identify the kinds of wood-boring beetles in the central part of Korea. Our second goal was to analyze the species composition and diversity of regional communities and to examine. A total of 10,461 individual wood-boring beetles belonging to 8 families and 50 species attracted to trap trees in the pine forests were recorded during the study period on study sites. The results of the analysis of collected species showed that the community structure on all study sites was similar. Seasonal occurrences of dominant wood-boring beetles (5 species) from each study site showed the highest number of all species, except for Siphalinus gigas in May, followed by a gradual decline, and the largest number of Siphalinus gigas appeared in June. The similarity index of species composition was relatively high, ranging from 0.75 to 0.90 for each study site.

• 국제학술발표논문집
• /
• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
• /
• pp.335-339
• /
• 2011

The unique characteristics of the construction industry - such as the fragmentation of its processes, varied scope of works and diversity of its participants - are contributory factors to poor project performance. Several issues are unresolved due to the lack of a comprehensive technique to measure project outcomes including: inefficient decision making, insufficient communication, uncertain site conditions, a continuously changing environment, inharmonious working relationships, mismatched objectives within the project team and a blame culture. One approach to overcoming these problems appears to be to measure performance by gauging contractor satisfaction (Co-S) levels, but this has not been widely investigated as yet. Additionally, the key Co-S dimensions at the project level are still not fully identified. This paper concerns a study of satisfaction dimensions, primarily by a postal questionnaire survey of construction contractors registered by the Malaysian Construction Industry Development Board (CIDB). Eight satisfaction dimensions are identified that are significantly and substantially relate to these contractors - comprising: project cost performance, schedule performance, product performance, design satisfaction, site safety, project profitability, business performance and relationships between participants. -Each of these dimensions is accorded different priority levels of satisfaction by different contractors. The output of this study will be useful in raising the awareness and understanding of project teams regarding contractors' needs, mutual objectives and open communication to help to deliver a successful project.

• 한국환경생태학회지
• /
• 제30권6호
• /
• pp.996-1008
• /
• 2016

제주 연안 저서생물(해조류, 무척추동물)의 군집구조가 저서 기질 형태에 따른 차이를 파악하기 위해 신흥해역에서 2015년 2월부터 11월까지 매월 조사되었다. 암반정점에서는 해조류 57종과 무척추동물 102종이 출현하였고, 몽돌정점에서는 해조류 42종과 무척추동물 67종이 관찰되어 암반기질에서 저서생물의 출현종수가 높은 것으로 나타났다. 해조류의 연평균 생물량은 암반정점에서 $1,601.13g\;wet\;wt./m^2$으로 몽돌정점의 $448.85g\;wet\;wt./m^2$보다 약 4배 높았다. 감태는 암반정점에서 전체 생물량의 62.64% ($1,002.93g/m^2$)를 차지하는 우점종이었고, 몽돌정점에서는 넓은게발, 감태, 붉은뼈까막살, 자루바다표고, 갈래곰보가 우점하였다. 저서무척추동물의 개체수 및 생물량은 암반정점에서 각각 $106.9indivi./m^2$, $871.93g/m^2$이며, 몽돌정점에서는 $64.6indivi./m^2$, $984.28g/m^2$로 나타났다. 무척추동물의 생물량 우점종을 파악한 결과, 암반정점에서는 소라(36.40%), 바퀴고둥(19.18%), 보라성게(13.61%)였고, 몽돌정점에서는 거품돌산호(54.13%)와 그물코돌산호(24.28%)로 기질에 따른 우점종의 차이를 확인하였다.

• 한국환경생태학회지
• /
• 제24권1호
• /
• pp.1-13
• /
• 2010

운문산 상류 수계의 저서성 대형무척추동물상 조사 및 생물학적 수질평가는 2007년 11월에서 2008년 9월까지 시행되었으며 조사결과 4문 5강 13목 61과 106속 140종이 조사되었다. 전 지점을 종합해 볼 때 날도래목의 네모집날도래 KUa가 우점종이며 지점별 우점도지수(DI)를 살펴보면 2지점이 0.553으로 가장 높았으며 7지점이 0.354로 가장 낮게 나타났다. 다양도지수(H')에서는 7지점이 2.18로 가장 높았으며 2지점이 1.75로 가장 낮게 나타났다. 저서성 대형무척추동물 생태점수(ESB)애서는 4지점과 7지점이 85로 가장 높게 나타나 '최우선보호수역'으로 판정되었으며 5 지점이 51 로 가장 낮게 나타나 '보호수역'으로 판정되었으며 전 지점 모두 오수생물계열에서 '변부수성'을 나타냈다.