• 한국물환경학회지
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• 제28권1호
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• pp.84-93
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• 2012

The study was conducted to analyze the spatio-temporal changes in water quality of the major 36 sampling stations of Nakdong River, depending on each station, season using the 17 water quality variables from 2000 to 2010. The result was verified to interpret the characteristics of water quality variables in a more accurate manners. According to the Principal component analysis (PCA) and Exploratory factor analysis (EFA) results; the results of these analyses were identified 4 factors, Factor 1 (nutrients) included the concentrations of T-N, T-P, $NO_{3}-N$, $PO_{4}-P$, DTN, DTP for sampling station and season, Factor 2 (organic pollutants) included the concentrations of BOD, COD, Chl-a, Factor 3 (microbes) included the concentrations of F.Coli, T.Coli, and Factor 4 (others) included the concentrations of pH, DO. The results of a Cluster analysis indicated that Geumhogang 6 was the most contaminated site, while tributaries and most of the down stream sites of Nakdong River were mainly affected by each nutrients (Factor 1) and organic pollutants (Factor 2). The verification consequence of Confirmatory factor analysis (CFA) from Exploratory factor analysis (EFA) result can be summarized as follows: we could find additional relations between variables besides the structure from EFA, which we obtained through the second-order final modeling adopted in CFA. Nutrients had the biggest impact on water pollution for each sampling station and season. In particular, It was analyzed that P-series pollutant should be controlled during spring and winter and N-series pollutant should be controlled during summer and fall.

• Journal of Microbiology
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• 제40권4호
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• pp.335-339
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• 2002

Partial sequences of 16S rRNA gene of five chroococcalian blue-green algal strains, Aphanothece nidulans KCTC AG10041, Aphanothece naegelii KCTC AG10042, Microcystis aeruginosa KCTC AG10159, Microcystis ichthyoblabe KCTC AG10160, and Microcystis viridis KCTC AG10198, which were isolated from water from the Geumgang River, were determined and were inferred their phylogenetic and taxonomic positions among taxa of order Chroococcales. Most taxa of Chroococcales whose partial 16S rRNA gene sequences were aligned in this study, are clustered with other related taxa. Aphanothece nidulans KCTC AG10041 and Aphanothece naegelii KCTC AG10042 made a cluster with other European species of these genera, which supported 100% of the bootstrap trees with a very high sequence similarity (97.4-99.4%) in this study. Three strains, Microcystis aeruginosa KCTC AG10159, M. ichthyoblabe KCTC AG10160, and M. viridis KCTC AG10198, formed a cluster with other Microcystis spp. supported 100 % of the bootstrap trees with a similarity of 97.0-99.9% except for two strains. However, this phylogentic tree made no resolution among the species of Microcystis spp. The topology of the tree reconfirmed the taxonomic status of three species of Microcystis, identified in this study based on the morphology, as three colonial types of Microcystis aeruginosa com. nov. Otsuka et al. (1999c). The genera of chroococcalian cyanophytes are heterogeneously clustered in these sequence analyses. We suggest that more molecular studies on the genera of Chroococcales with reference strains, widely collected from restricted geographic or environmental ranges, get accurate taxonomic or phylogenetic determinations.

• 한국식품조리과학회지
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• 제22권3호통권93호
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• pp.259-269
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• 2006

The purposes of this study were to measure the correlation between leadership style and job satisfaction in family restaurants, and to compare the effectiveness of two different styles of leadership: transformational and transactional. The questionnaire used in this study was designed to measure all variables in the research model, and was made two kinds for employees and for managers. It was distributed to 550 employees and 12 managers in 16 stores of 4 family restaurants, from September 10 to October 7, 2004. A total of 303 usable employees' questionnaires were received, giving a 55.0% response rate, and all of managers responded. Statistical data analysis was completed using SPSS Win(11.0) for the following analyses: descriptive, reliability, factor, ANOVA, correlation and cluster. The results were as follows. First, the most influential leader was the senior staff in most of the hierarchies that were studied. Second, transformational leadership had a positive correlation with job satisfaction for family restaurant employees, while transactional leadership had a negative correlation. Third, using cluster analysis, four leadership groups were identified: transformational(44%), transactional(29%), a combination of both styles(4%), and unidentifiable style(23%). Fourth the transformational leadership group produced e highest rates job satisfaction for family restaurant employees. The transactional leadership group produced the lowest job satisfaction. According to the results, the most reasonable leadership style in family restaurants is transformational leadership.

• 원예과학기술지
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• 제35권2호
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• pp.220-231
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• 2017

Grafting using a pumpkin (Cucurbita sp.) rootstock is an effective way to improve cucumber (Cucumis sativus) resistance to a combination of chilling and salinity stresses. We evaluated the tolerance of 15 pumpkin cultivars to chilling, salinity, and combined stresses at the germination and seedling stages. Selected plant characteristics, including germination rate, germination potential, germination index, plant height, stem thickness, fresh weight, and dry weight, were analyzed. We used the unweighted pair group method with arithmetic mean for cluster analyses to determine the stress tolerance levels of the pumpkin cultivars. The 15 cultivars were divided into three clusters: tolerant, moderately tolerant, and susceptible to stress treatments. The stress tolerances of all cultivars were variable in the germination and seedling stages, and most cultivars were not tolerant to individual treatments of chilling or salinity stresses at both stages. These results suggest that identifying suitable cultivars for use as rootstock during cucumber grafting should involve the evaluation of stress tolerance during different growth stages. Additionally, cultivars tolerant to chilling stress may not be tolerant to salinity stress; therefore, the choice of pumpkin rootstock should depend on where the grafted plant will be grown. Cultivars tolerant to a combination of chilling and salinity stresses may be useful as rootstock for cucumber grafting. Our findings may serve as reference material for choosing appropriate pumpkin rootstocks for cucumber grafting.

• 한국경제지리학회지
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• 제12권3호
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• pp.260-276
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• 2009

캐나다 나이아가라 지역은 겨울에 영하 20도를 오르내리는 추위로 유명하다. 그런데도 불구하고 이 지역은 예로부터 포도, 자두, 옥수수 등과 같은 과일과 채소가 많이 생산되고 있다. 이 지역의 선도적인 포도주 양조업자들은 1970년대 중반부터 포도나무를 고급 포도주용으로 개량하고, 기후관계로 타 지역에서 쉽게 생산할 수 없는 아이스와인을 생산하기 시작하여 불과 30여 년만에 세계적인 아이스와인 클러스터로 성장하였다. 나이아가라의 포도주 양조업자들은 포도원(Winery)을 중심으로 음악회 등 각종 컨벤션을 개최하여 포도원 관광객을 유치하는가 하면, 대학과 연구소 등과 협력하여 포도재배와 포도주 양조에 관한 연구개발 및 교육분야에 많은 고용기회를 창출하였다. 또한 주 정부는 주류 판매망과 와인 카운슬(Ontario Wine Council)이라는 기관을 통해 포도주 산업 클러스터의 성장과 발전에 기여하였다. 본 연구는 나이아가라의 이러한 산업집적 현상을 지역혁신론에 입각해서 분석하고, 정책적, 이론적 시사점을 제시한다.

• 한국조리학회지
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• 제19권2호
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• pp.52-64
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• 2013

본 연구의 목적은 (1) 선택결정요인에 따른 가정식사대용식(HMR) 소비자를 세분화 하고, (2) 각 세분시장의 독특한 인구통계적인 특성과 구매행태를 조사하는 것이다. 이를 위해 총 266개의 응답을 SPSS 19.0을 이용해 분석하였다. 통계분석은 빈도분석, 교차분석, 요인분석, 군집분석, 다변량 분산분석, 판별분석이 사용되었다. 요인분석 결과 음식의 질(food quality), 디자인(design), 편리성(convenience), 접근성(accessibility) 과 같이 4개의 요인이 도출되었다. 도출된 요인을 이용해 군집분석을 실시한 결과 2개의 세분시장이 파악되었으며, 각각 고관여 HMR 소비자와 저관여 HMR 소비자로 명명되었다. 고관여 HMR 소비자는 모든 선택결정요인에 걸쳐 저관여 HMR 소비자에 비해 더 중요하게 지각하고 있는 것으로 나타났다. 또한 두 집단은 인구통계적 특성과 구매행태에 있어 차이가 있는 것으로 나타났다. 위와 같은 통계분석 결과에 따른 시사점이 결론부에 제시되었다.

• Journal of Microbiology
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• 제40권3호
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• pp.211-218
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• 2002

A 4.8-kb DNA fragment encoding the P-450 type hydroxylase and ferredoxin genes was cloned from Pseudonocardia autotrophica IFO 12743 that can convert vitamin D$\_$3/ into its hydroxylated active forms. In order to isolate the P-450 gene cluster in this organism, we designed PCR primers on the basis of the regions of an oxygen binding site and a heme ligand pocket that are general characteristics of the P-450 hydroxylase. Sequencing analysis of the BamHI fragment revealed the presence of four complete and one incomplete ORFs, named PauA, PauB, PauC, and PauD, respectively. As a result of computer-based analyses, PauA and PauB have homology with enoyl-CoA hydratase from several organisms and the positive regulators belonging to the tetR family, respectively. PauC and PauD show similarity with SuaB/C proteins and ferredoxins, respectively, which are composed of P-450 monooxygenase systems for metabolizing two sulfonylurea herbicides in Streptomyces griseolus PauC shows the highest similarity with another CytP-450$\_$Sca2/ protein that is responsible for production of a specific HMG-CoA reductase inhibitor, pravastatin, in S. carbophilus. Cultures of Steptomyces lividans transformant, containing the P-450 gene cluster on the pWHM3 plasmid, was unable to convert vitamin D$\_$3/ to its hydroxylated forms.

• 한국지역지리학회지
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• 제6권3호
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• pp.169-184
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• 2000

미국의 씬씨내티 대도시지역을 대상으로 인자분석 및 Hot Spot 분석에 의해 산업 군집과 그것의 경계가 확인되어졌다. 전통적 투입 산출 접근법이 비공간적 산업 군집을 추출하는 반면 이 연구는 전통적 접근을 GIS 기법과 결합하여 경계를 설정한다. 투입 산출 산업 군집의 결과를 선도산업 부문과 결합하여 5개 선도 산업 군집을 추출하였는데 그것은 음식료품, 화학, 금속, 금속제품, 기계공업 부분이다. 그리고 Hot Spot 기법을 이용하여 연구지역의 산업 군집을 Arcview에 통합하여 시각화하였다. 산업 군집의 공간적 결합정도와 공간적 한계를 결정하는 것은 경제의 공간구조의 효율성을 측정하는 부가적 접근이 될 수 있다. 산업 군집과 산업의 공간적 군집 접근은 하나의 공장이나 기업의 수준보다 집계적인 차원에서 산업의 공간적 배열의 새로운 모형 개발 기초의 가능성을 제시한다.

• 농촌계획
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• 제21권1호
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• pp.129-141
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• 2015

This study classifies the types of spatio-functional differentiation in Korean island areas and analyses typical characters and suggests the development directions by each type. Eup/Myeon-level island areas are classified as six types by the factor analysis and the cluster analysis. First type is the traditional rural center. This type puts emphasis on maintaining phase as the central space and has to maximize development potential of the whole of settlement zone. Second type is the specialized region in manufacturing industry and the qualitative mutual growth of regional industries is able to be suggested. Third type is the specialized region in the neighborhood service provision. This type needs to devise the plan for utilizing potential customers actively and developing into the region specialized in tourism industry. Fourth type is the specialized region in tourism-support service functions. This type has to promote differentiated policies for maintaining amenity infra or value of countryside capital and preservation and utilization of resources by regional features. Fifth type is the fishing industry-dominated region. This type has to promote sustainable fishery development through the policy reflecting regional features and condition. Finally, sixth type is the sluggish region dominated with the traditional agriculture and fishery. This type is needed to aim at developing into the new food production base having the advantage of clean environment by strengthening support in specialized agro-fishery products. The existing researches on spatio-functional differentiation were mostly discussed with respect to land development, but this study highlights the difference in deal with the island areas distinguished from the condition of industry.

• 한국해양학회지
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• 제19권1호
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• pp.68-81
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• 1984

한국 서남해역에 있어서 식물플랑크톤의 군집구조와 분포를 밝히기 위하여 1980년 여름에 수평적, 수직적으로 채집한 정량 자료를 분석하였다. 연구해역은 상이한 水塊를 대표하는 상이한 3개의 특징적인 군집을 이루고 있음을 보여준다. 제 1 군집은 대부분 연안성 및 내수성 硅藻類로 구성되어 서남해의 연안 수역을 대표하며, 제 2 군집은 외양성 및 연안성 구조류와 2-3종의 鞭毛藻類로 구성되어 黑潮의 지류로 생각되는 高鹽 水性인 제주 부근의 수역을 대표한다. 제 3 군집은 주로 소형인 鞭毛藻류와 微細藻類로 구성되고 底鹽 수성인 중간 수역을 대표하는 것으로 나타났다. 또한 식물플랑크톤과 환경요인의 수직분포에서 세포수, chlorophyll-a, 및 용존산소등이 특히 계절적인 pycnocline 부근의 수층에서 높은 농도를 보여준다. nanoplankton은 군집내에서 90% 이상에 이를 만큼 점유율을 보여 중요성이 높음을 나타낸다.