• Journal of the Korean Data and Information Science Society
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• v.27 no.3
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• pp.653-661
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• 2016

In this paper, we provide a suitable optimal exponent in the generalized Pythagorean theorem and propose to use the logistic model & the probit model to estimate the winning rate in Korean professional baseball league. Under a criterion of root-mean-square-error (RMSE), the efficiencies of the proposed models have been compared with those of the Pythagorean theorem. We use the team historic win-loss records of Korean professional baseball league from 1982 to the first half of 2015, and the proposed methods show slight outperformances over the generalized Pythagorean method under the criterion of RMSE.

• Korean Journal of Microbiology
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• v.44 no.1
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• pp.43-48
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• 2008

Standard sample for quality control of total coliform measurement was procured by addition of nalidixic acid and cephalexin as bacteriostatic agents to Escherichia coli cultured broth. After making the standard sample, the number of E. coli was measured by fluorescence microscopic count method and plate count method by 12 hr interval. The numbers of E. coli remained unchanged for at least for 48 hr at room temperature which ranged from 3.5 to $4.2{\times}10^5\;cells/ml$ and from 1.0 to $1.2{\times}10^4\;CFU/ml$ by direct fluorescence microscopic count method and plate count method, respectively. This result suggests that microbial standard sample with bacteriostatic agents of nalidixic acid and cephalexin is usable for quantitative quality control.

• Journal of Korean Society of Forest Science
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• v.100 no.1
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• pp.118-123
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• 2011

Pine (Pinus densiflora) forests of 315 sites were classified by applying the phytosociological method, TWINSPAN and DCA (detrended correspondence analysis). The floristic composition and diversity patterns of the vegetation types analyzed and documented. The vegetation types were classified 8 groups including 4 groups of Quercus mongolica type and 4 groups of Quercus serrata-Smilax china type. Taxonomically, Compositae was the most diverse family (21 genus, 45 species) and followed in order of Liliaceae (18 genus, 34 species), Rosaceae (17 genus, 34 species), and Leguminosae (15 genus, 25 species). The patterns of species richness, diveristy and evenness were significantly different among the vegetation types. In altitudinal pattern of species diversity, species richness monotonically decreased but species evenness increased with increasing altitude.

• Proceedings of the Korea Contents Association Conference
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• 2010.05a
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• pp.613-615
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• 2010

이 연구는 민간경호경비조직의 서비스품질과 고객만족 및 로열티의 관계를 규명하는데 목적을 두고 있다. 이를 위해 이 연구에서는 서울시 소재 민간경호경비회사의 서비스를 이용하고 있는 고객을 대상으로 집락무선표집법을 활용하여 총 209명을 표집하였다. 설문지의 타당도 및 신뢰도를 검증하기 위하여 이 연구에서는 전문가회의와 요인분석을 통하여 타당도를 검증하였으며, 신뢰도분석을 통하여 신뢰도검증을 실시하였다. 통계처리방법은 SPSSWIN 17.0프로그램을 활용하여 요인분석, 신뢰도분석, 다중회귀분석과 경로분석을 실시하였다. 결론은 다음과 같다. 첫째, 서비스품질이 좋을수록 고객만족은 높아진다. 둘째, 서비스품질이 좋을수록 로열티는 강화된다. 셋째, 고객만족이 높을수록 로열티는 높아진다. 넷째, 서비스품질은 고객만족 및 로열티에 인과적 영향을 미친다.

• Horticultural Science & Technology
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• v.32 no.1
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• pp.46-52
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• 2014

This study was conducted to compare colony forming unit (CFU) of microorganisms in closed and open soilless culture systems for estimating the possibility for potential disease occurrence. Samples were collected at four different positions in four commercial greenhouses with closed or open soilless culture system using rock wool or coir as substrate, respectively. The distance between sampling positions was 3 cm starting from the substrate and the surface area of each position was $25cm^2$. The CFU of fungi was significantly higher in the open system, while that of bacteria was not significantly different but showed relatively lower in the closed system. Samples collected at the plastic surface of the substrates where little environmental effects occurred from drainage showed lower CFU than any other positions. The principal component analysis showed that samples collected on the drainage pathway highly affected the changes in microbial population in the greenhouse. These results indicated that greenhouses with closed soilless culture are expected to have more advantageous conditions for restraining the microbial growth, resulting in the lower potential of disease occurence in greenhouse ecosystem.

• Asian Journal of Turfgrass Science
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• v.21 no.2
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• pp.113-126
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• 2007

Mineral nutrients and population dynamics of soil microbes in the root zones of zoysiagrass infected by Rhizoctonia solani AG2-2 and that of healthy plants were sampled from ten golf courses using a cup cutter(diameter $10\;cm\;{\times}\;8\;cm$ deep). Analysis of variance(ANOVA) showed significant differences in content of $NO_3$-N(P = 0.05), $NH_4$-N(P = 0.1), and K(P = 0.1) between infected and healthy samples. The content of $NO_3$-N in the soils of large patch was 9.49 mg/kg and that in soil of healthγ plants was 7.02 mg/kg. However, the content of $NH_4$-N in the soil of large patch was 12.02 mg/kg whereas 14.40 mg/kg for the soil under the healthy plants. The content of K in the soil of large patch was lower than that of soil of healthy plants. There was few numbers of Pseudomonas colonies In the soils of large patch compared to that of healthy plants. These results indicated that the content of $NO_3$-N, NH4-N, and K and the microbial population dynamics in root zones correlated to occurrence of large patch.

• Journal of Digital Convergence
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• v.15 no.6
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• pp.339-344
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• 2017

In this study, microorganisms were isolated from nosocomial environment and are identified by biochemical analysis as the part of biochemical and technical convergence. Microorganisms were collected at intense care unit of general hospital located in Pyeongtak (2014.11.28. - 2014. 11. 30). Using a VITEK2 equipment of biochemical approaches, eleven microorganisms e.g., Micrococcus luteus (or M. lylae), Granulicatella adiacens (M. luteus or M. lylae), Staphylococcus caprae, Sphingomonas paucimobilis, Kocuria kristinae, G elegans, Aerococcus viridans (or Staphylococcus arlettae), Methylobacterium spp., Dermacoccus nishinomiyaensis (or Kytococcus sedentarius), Kocuria kristinae (or M. luteus, M. lylae), Pseudomonas oryzihabitans were identified. And then identified bacteria plates were applied with a plastic stick, so called with "FarmeTok (medistick/Puristic) to produce ClO2. ClO2-releasing plastic stick showed the very strong inhibition of bacterial growth with about 99.9%. There were no bacterial colonies on the ClO2-incubated plate. Taken together, it is suggested that chlorine dioxide should be very strong inhibitor to microorganisms of nosocomial infections.

• Journal of the Korean Data and Information Science Society
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• v.27 no.5
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• pp.1285-1291
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• 2016

To quantify an concept we often use Likert summated rating scale of original or standardized variables in case the variables are relatively less. When variables have different scales, standardized values tends to be used rather than the original values. This is also true in evaluating systems. For example, we may use standardized values of local tax levy, population, and etc. and use the summed value of the standardized values to access the degrees of development. In this paper, we propose using a data-driven weighted sum for a scoring system and the way how to obtain the weights. We apply the proposed method to a real data set and find that proposed method is better than the usual summated rating scale.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.249-250
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• 2011

이 연구의 목적은 무용전승자들의 중요무형문화재보유자에 대한 신뢰가 전수만족 및 전수애착도에 미치는 영향을 규명하는데 있다. 이 연구는 2011년 중요무형문화재무용으로 지정된 7개 단체 보존회에 등록된 보존회원을 모집단으로 설정한 후 집락무선표집법을 이용하여 최종분석에 이용된 사례 수는 총 229명이다. SPSSWIN 18.0을 이용하여 요인분석, 신뢰도분석, 회귀분석 등을 실시하였다. 설문지의 신뢰도는 Cronbach's ${\alpha}$값이 .829이상으로 나타났다. 결론은 다음과 같다. 첫째, 보유자신뢰는 전수만족에 영향을 미친다. 즉, 보유자신뢰가 높을수록 전수만족 또한 높아진다. 둘째, 보유자신뢰는 전수애착도에 영향을 미친다. 즉, 보유자신뢰가 높을수록 전수애착도 또한 높아진다. 셋째, 전수만족은 전수애착도에 영향을 미친다. 즉, 전수만족이 높을수록 전수애착도 또한 높아진다.

• Journal of the Korean earth science society
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• v.18 no.6
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• pp.515-521
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• 1997

To investigate the nature of the waste materials in the Nanjido Landfill, we have conducted multivariate statistical analysis of geophysical data set comprised of magnetic, gravity, LandSat TM thermal band and surface depression measurement data. Because these data sets show different responses to the depth, we have transformed the observed total field magnetic data and gravity data to the residual reduced-to-pole(RTP) magnetic anomalies and the three dimensional density anomalies, respectively, and utilized the informations about the upper shallow part of the landfills only in the following process. For the statistical analysis at the points of depression measurement, the magnetic, density and LandSat data values at these points are determined by interpolation process. Since the multivarite statistical analysis technique utilizes a clustering algorithm for classification of data set and we have measured the dissimilarity between objects by using Euclidean distance, standardization was applied prior to distance calculation in order to eliminate any scaling effects due to different measurement unit of each data set. The hierarchial grouping technique was used to construct the dendrogram. The optimum number of statistical groups(clusters), which are classified on the basis of geophysical and geotechnical characteristics, appeared to be six on the resulting dendrogram. The result of this study suggests that the dimension and nature of the multicomponent waste landfills can be identified by application of the multivarite statistical analysis technique to integrated geophysical data sets.