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Allocation of New Construction Land Based on Land Competitiveness Evaluation AgEcon
Huo, Guang-hui; Huang, Liang-xiang.
Connotation of land competitiveness is expatiated from both the narrow sense and broad sense. Evaluation index system of land competitiveness is established according to the 2008 China Statistical Yearbook and 2008 China Land Resources Statistical Yearbook. Efficiency Coefficient Method and Principal Component Analysis Method are used to evaluate the land competitiveness of 31 provincial units in China. Result shows that in the year 2007, land competitiveness gradually decreases from southeast to northwest. The land competitiveness and GDP per unit land have significant negative correlation. The rank of approved new construction land has low positive correlation with the rank of land competitiveness in China. This indicates that there is little correlation...
Tipo: Journal Article Palavras-chave: Land competitiveness; New construction land; Pareto Optimality; Efficiency coefficient method; Principal component analysis; China; Agribusiness.
Ano: 2010 URL: http://purl.umn.edu/102394
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An electronic tongue taste evaluation: identification of goat milk adulteration with bovine milk IPB - Escola Superior Agrária
Dias, L.G.; Peres, António M.; Veloso, Ana C.A.; Reis, F.S.; Vilas-Boas, Miguel; Machado, A.A.S.C..
An electronic tongue with 36 cross-sensibility sensors was built allowing a successful recognition of the five basic taste standards, showing high sensibility to acid, salty and umami taste substances and lower performance to bitter and sweet tastes. The taste recognition capability was afterwards tested in the detection of goat milk adulteration with bovine milk, which is a problem for the dairy industry. This new methodology is an alternative to the classical analyticalmethods used to detect caprine milk adulterations with bovine milk, being a simpler, faster and economical procedure. The different signal profiles recorded by the e-tongue device together with linear discriminant analysis allowed the implementation of a model that could distinguish...
Tipo: Article Palavras-chave: Electronic tongue; Taste standards; Milk adulteration; Cow milk; Goat milk; Principal component analysis; Linear discriminant analysis.
Ano: 2009 URL: http://hdl.handle.net/10198/1029
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Análise de agrupamento de dados de expressão gênica na Rede Genômica Animal. Infoteca-e
HIGA, R. H.; GIACHETTO, P. F.; YAMAGISHI, M. E. B.; IBELLI, A. M. G.; REGITANO, L. C. de A.; CARDOSO, F. F..
O objetivo deste trabalho é apresentar a análise de agrupamento de dados de expressão gênica, conforme realizada no escopo da ?Rede Genômica Animal?. Na seção 2, são apresentados conceitos básicos sobre análises de agrupamento. Em particular, os algoritmos de agrupamento utilizados nessas análises compreendem aqueles mais conhecidos, como k-means, SOM e agrupamento hierárquico. A plataforma de análise escolhida para realização das análises de agrupamento na ?Rede Genômica Animal? é o ambiente de análise estatística R (R DEVELOPMENT CORE TEAM, 2010) e o projeto Bioconductor (GENTLEMAN et al., 2004). Assim, na seção 3 é apresentado um exemplo completo de análise de agrupamento e seu respectivo script R.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Agrupamento de dados; Expressão gênica; Rede Genômica Animal; Análise de componentes principais - PCA.; Análise Estatística.; Gene expression; Algorithms; Statistical analysis; Principal component analysis.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/883623
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Analise de estabilidade de producao de genotipos de batata no Rio Grande do Sul. Repositório Alice
PEREIRA, A. da S.; COSTA, D. M. da..
Este trabalho teve os objetivos de: comparar os valores da interacao genotipo-ambiente (GA) obtidos com o uso do modelo dos efeitos principais aditivos e interacao multiplicativa (AMMI) e na analise da regressao linear (RL); comparar a estabilidade de producao de genotipos de batata (Solanum tuberosum L.). Dez genotipos foram avaliados em 34 ambientes (combinacoes de local, periodo de cultivo e ano) no Rio Grande do Sul, Brasil, em 1994 e 1995. A soma dos quadrados (SQ) das regressoes explicou somente 19,5% da SQ da interacao GA, ao passo que o primeiro componente (CP1) da analise dos componentes principais explicou 44,6%. A SQ do CPI foi maior que o dobro das SQ de todas as tres regressoes combinadas (conjunta, genotipa e ambiental). Portanto, a analise...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Batata; Solanum tuberosum; Interacao genotipo-ambiente; Modelo AMMI; Regressao linear; Analise de componentes principais; Genotype-environement interaction; AAMI Model; Linear regression; Principal component analysis.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/handle/doc/85559
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Aplicativo para análise de componentes principais. Infoteca-e
PALUMBO, F. V. P.; CARVALHO, J. R. P. de; MOURA, M. F..
Análise por componentes principais. Entrada de dados para o aplicativo: Procedimento. Opções do aplicativo. Especificação de algoritmos: Descrição de método. Cálculo usando a matriz de variâncias e covariâncias(S). Cálculo usando a matriz de correlação (R). Cálculo usando a Matriz Parcial.
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Algoritmos; Software NTIA; Análise de componentes principais; Análise multivariada; Algorithms; Computer software; Principal component analysis; Multivariate analysis.
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/6923
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Assessment of heavy metals in soils of a vineyard region with the use of principal component analysis. Repositório Alice
VALLADARES, G. S.; CAMARGO, O. A. de; CARVALHO, J. R. P. de; SILVA, A. M. C..
Agricultural management with chemicals may contaminate the soil with heavy metals. The objective of this study was to apply Principal Component Analysis and geoprocessing techniques to identify the origin of the metals Cu, Fe, Mn, Zn, Ni, Pb, Cr and Cd as potential contaminants of agricultural soils. The study was developed in an area of vineyard cultivation in the State of São Paulo, Brazil. Soil samples were collected and GPS located under different uses and coverings. The metal concentrations in the soils were determined using the DTPA method. The Cu and Zn content was considered high in most of the samples, and was larger in the areas cultivated with vineyards that had been under the application of fungicides for several decades. The concentrations of...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Poluição do solo; Análise de componentes principais; Cobre; Zinco; Principal component analysis; Geographic information systems; Soil pollution; Copper; Zinc.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/575988
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Bacteria diversity and microbial biomass in forest, pasture and fallow soils in the southwestern Amazon basin Rev. Bras. Ciênc. Solo
Cenciani,Karina; Lambais,Marcio Rodrigues; Cerri,Carlos Clemente; Azevedo,Lucas Carvalho Basílio de; Feigl,Brigitte Josefine.
It is well-known that Amazon tropical forest soils contain high microbial biodiversity. However, anthropogenic actions of slash and burn, mainly for pasture establishment, induce profound changes in the well-balanced biogeochemical cycles. After a few years the grass yield usually declines, the pasture is abandoned and is transformed into a secondary vegetation called "capoeira" or fallow. The aim of this study was to examine how the clearing of Amazon rainforest for pasture affects: (1) the diversity of the Bacteria domain evaluated by Polymerase Chain Reaction and Denaturing Gradient Gel Electrophoresis (PCR-DGGE), (2) microbial biomass and some soil chemical properties (pH, moisture, P, K, Ca, Mg, Al, H + Al, and BS), and (3) the influence of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Land use changes; PCR-DGGE; Bacterial diversity; Microbial biomass; Principal component analysis.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000400015
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BEHAVIOR OF BROILERS UNDER THE INFLUENCE OF LED LIGHTING AND MICROMETEOROLOGICAL ELEMENTS REA
Rodrigues,Tatiana P. N. da S.; Pandorfi,Héliton; Guiselini,Cristiane; Almeida,Gledson L. P. de; Morrill,Waldirene B. B..
ABSTRACT The objective of this research was to analyze the differences between the food behaviors observed under the factors of production environment, sex and lighting system, using stochastic tools of multivariate analysis. As for the thermal characteristics of the environment, air temperature (T, °C), enthalpy (H, kJ kg-1), and black globe temperature and humidity index (BGTHI) showed high positive correlation with each other and strong negative correlation with relative humidity (RH, %). The “male drinking” behavior was positively associated with thermal characteristics of the environment in the three periods of the day, that is, the act of drinking more water would be a way to alleviate thermal stress. Birds subjected to red LED showed a strong...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal welfare; Broiler farming; Lighting system; Principal component analysis; Thermal comfort.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300272
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Benchmarking pathway interaction network for colorectal cancer to identify dysregulated pathways BJMBR
Wang,Q.; Shi,C.-J.; Lv,S.-H..
Different pathways act synergistically to participate in many biological processes. Thus, the purpose of our study was to extract dysregulated pathways to investigate the pathogenesis of colorectal cancer (CRC) based on the functional dependency among pathways. Protein-protein interaction (PPI) information and pathway data were retrieved from STRING and Reactome databases, respectively. After genes were aligned to the pathways, each pathway activity was calculated using the principal component analysis (PCA) method, and the seed pathway was discovered. Subsequently, we constructed the pathway interaction network (PIN), where each node represented a biological pathway based on gene expression profile, PPI data, as well as pathways. Dysregulated pathways...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pathway interaction network; Colorectal cancer; Dysregulated pathways; Principal component analysis; Protein-protein interaction.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000500602
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Bioactive phytochemicals and antioxidant activity in fresh and dried lychee fractions1 Rev. Ciênc. Agron.
Queiroz,Estela de Rezende; Abreu,Celeste Maria Patto de; Oliveira,Kelly da Silva; Ramos,Vinicius de Oliveira; Fráguas,Rodrigo Martins.
Fruit of the lychee cv. Bengal are approximately 50% peel and seeds, which are discarded. These by-products have antioxidant compounds which are capable of blocking the harmful effects of free radicals in the body. Bioactive compounds (ascorbic acid, beta-carotene, lycopene and phenols) and antioxidant activity were evaluated in different extracts, both fresh and dried at 45 °C, of the skin, pulp and seeds of the lychee, which were subjected to principal component analysis to clarify which of the compounds are responsible for this activity. Principal component analysis explained 82.90% of the variance of the antioxidant profile of the lychee. The peel displayed higher levels of phenols, ascorbic acid, beta-carotene and antioxidant activity, while the seeds...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lychee; Antioxidants; Principal component analysis.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100163
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Characterization of organic matter in sediment cores of the Todos os Santos Bay, Bahia, Brazil, by elemental analysis and 13C NMR. Repositório Alice
COSTA, A.B.; NOVOTNY, E. H.; BLOISE, A. C.; AZEVEDO, E. R. de; BONAGAMBA, T. J.; ZUCCHI, M.R.; SANTOS, V. L. C. S.; AZEVEDO, A. E. G..
2011
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Cores; Principal component analysis; Refinery; Autoregressive Integrated Moving Average; Environmental impact.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/handle/doc/896516
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Characterization of phosphate structures in biochar from swine bones PAB
Novotny,Etelvino Henrique; Auccaise,Ruben; Velloso,Marcia Helena Rodrigues; Corrêa,Juliano Corulli; Higarashi,Martha Mayumi; Abreu,Valéria Maria Nascimento; Rocha,José Dilcio; Kwapinski,Witold.
The objective of this work was to develop an alternative methodology to study and characterize the phosphate crystalline properties, directly associated with solubility and plant availability, in biochar from swine bones. Some phosphate symmetry properties of pyrolyzed swine bones were established, using solid state nuclear magnetic resonance spectroscopy, principal component analysis, and multivariate curve resolution analysis, on four pyrolyzed samples at different carbonization intensities. Increasing carbonization parameters (temperature or residence time) generates diverse phosphate structures, increasing their symmetry and decreasing the crossed polarizability of the pair ¹H-31P, producing phosphates with, probably, lower solubility than the ones...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone phosphate; Phosphate availability; Principal component analysis; Pyrolysis; Multivariedade curve resolution analysis; Soil fertility.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500006
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Chemical characteristics of grape juices from different cultivar and rootstock combinations. Repositório Alice
NASSUR, R. de C. M. R.; PEREIRA, G. E.; ALVES, J. A.; LIMA, L. C. de O..
The objective of this work was to evaluate the influence of different combinations of grape cultivars and rootstocks on chemical characteristics of grape juices. Six treatments were evaluated, consisting of combinations between the Isabel Precoce and BRS Cora grape cultivars and the 'IAC 766', 'IAC 313', and 'IAC 572' rootstocks. Approximately 10 L of juice were obtained per treatment. Analyses of color, total soluble solids content, pH, anthocyanins, total phenolics, total sugars, and quantification and identification of biogenic amines by HPLC were performed. Biogenic amines, such as putrescine, cadaverine, spermidine, and spermine, were found in all evaluated cultivars. By principal component analysis (PCA), treatments can be divided into two groups,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Suco de uva; Antocianinas; Aminas biogênicas; Fenólicos; Características químicas; Uva; Vitis Labrusca; Grapes; Anthocyanins; Biogenic amines; Principal component analysis.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/995023
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Chemical characteristics of grape juices from different cultivar and rootstock combinations PAB
Nassur,Rita de Cássia Mirela Resende; Pereira,Giuliano Elias; Alves,Juliana Alvarenga; Lima,Luiz Carlos de Oliveira.
The objective of this work was to evaluate the influence of different combinations of grape cultivars and rootstocks on chemical characteristics of grape juices. Six treatments were evaluated, consisting of combinations between the Isabel Precoce and BRS Cora grape cultivars and the 'IAC 766', 'IAC 313', and 'IAC 572' rootstocks. Approximately 10 L of juice were obtained per treatment. Analyses of color, total soluble solids content, pH, anthocyanins, total phenolics, total sugars, and quantification and identification of biogenic amines by HPLC were performed. Biogenic amines, such as putrescine, cadaverine, spermidine, and spermine, were found in all evaluated cultivars. By principal component analysis (PCA), treatments can be divided into two groups,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitis labrusca; Anthocyanins; Biogenic amines; Phenolics; Principal component analysis.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000700540
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Chemical quality of bottled mineral waters from markets of Curitiba-PR-Brazil BABT
Santos,Éder José dos; Oliveira Junior,Dasio Roberto de; Hermann,Amanda Beatriz; Sturgeon,Ralph Edward.
ABSTRACT Twenty-seven bottled mineral waters from local markets in Curitiba, State of Paraná, Brazil were analyzed for a number of constituents, including: pH, conductivity, total dissolved solids, hardness, HCO3 - and CO 3 2-, as well as Ca2+, Mg2+, Na+, K+, NH4 + , F-, Cl-, NO3 -, NO2 - and SO4 2- by ion chromatography (IC); Al, Ba, Cd, Cr, Cu, Fe, Li, Mn, Ni, Sr, V and Zn by inductively coupled plasma optical emission spectrometry (ICP OES); Hg by cold vapor generation-ICP OES and As, Pb, Sb and Se by ICP-mass spectrometry (ICP-MS). The obtained limits of quantitation (LOQ) were adequate for the determination of all analytes using the various analytical techniques. Results for the analysis of AccuStandard certified reference materials QCS-01-5,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bottled mineral waters; Elemental composition; Chemical quality; Principal component analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100513
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Chemometrics applied to the incorporation of omega-3 in tilapia fillet feed flaxseed flour Ciênc. Tecnol. Aliment.
Nishiyama,Márcia Fernandes; Souza,Aloisio Henrique Pereira de; Gohara,Aline Kirie; Santos,Hevelyse Munise Celestino dos; Oliveira,Carlos Antonio Lopes de; Ribeiro,Ricardo Pereira; Souza,Nilson Evelázio de; Gomes,Sandra Terezinha Marques; Matsushita,Makoto.
This study evaluated the effect of adding flaxseed flour to the diet of Nile tilapia on the fatty acid composition of fillets using chemometrics. A traditional and an experimental diet containing flaxseed flour were used to feed the fish for 60 days. An increase of 18:3 n-3 and 22:6 n-3 and a decrease of 18:2 n-6 were observed in the tilapia fillets fed the experimental diet. There was a reduction in the n-6:n-3 ratio. A period of 45 days of incorporation caused a significant change in tilapia chemical composition. Principal Component Analysis showed that the time periods of 45 and 60 days positively contributed to the total content of n-3, LNA, and DHA, highlighting the effect of omega-3 incorporation in the treatment containing flaxseed flour.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nile tilapia; Essential fatty acids; Flaxseed flour; Principal component analysis.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000300003
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Classificação da capacidade produtiva de povoamentos não desbastados de clones de eucalipto. Repositório Alice
OLIVEIRA, M.L.R. de; LEITE, H.G.; NOGUEIRA, G.S.; GARCIA, S.L.R.; SOUZA, A.L. de.
O objetivo deste trabalho foi desenvolver e propor um procedimento para a estratificação de florestas de clones de eucalipto não desbastados, para a classificação de sua capacidade produtiva. Utilizaram-se dados provenientes de 70 clones, distribuídos em 5.020 parcelas permanentes de inventários florestais contínuos, com pelo menos três medições, de periodicidade anual, em cada clone. Para todos os clones, foi ajustado o modelo de Schumacher para as variáveis: área basal; altura dominante; diâmetro médio; e volume comercial, com casca. Com esses parâmetros, foi utilizado o método de Tocher, que se mostrou eficiente para agrupar clones com tendências semelhantes de crescimento em altura dominante. A estimativa de índice de local, para clones com menos de...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Eucalyptus; Análise de agrupamento; Análise de componentes principais; Índice de local; Inventário florestal; Método da curva-guia; Cluster analysis; Principal component analysis; Site index; Forest inventory; Guide-curve method.
Ano: 2008 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125670
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CLASSIFICATION OF ROBUSTA COFFEE FRUITS AT DIFFERENT MATURATION STAGES USING COLORIMETRIC CHARACTERISTICS REA
Costa,Anderson G.; Sousa,Daniela A. G. de; Paes,Juliana L.; Cunha,João P. B.; Oliveira,Marcus V. M. de.
ABSTRACT Coffee growers who produce the robusta species (Conilon) have sought to increase productivity and drink quality by improving production techniques. Artificial vision systems can assist in increasing the efficiency of operations associated with crop management. This study aimed to obtain colorimetric characteristics of robusta coffee fruits at different stages of maturity and use them for classifying fruits from digital images. A digital camera with spectral resolution in the visible was used to acquire images from 60 samples of coffee fruits at the green, cherry, and over-ripe stages of maturity. Colorimetric variables were extracted from the RGB, HIS, and L*a*b* color models and correlated with the physicochemical attributes of the fruits. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Artificial vision systems; Coffea canephora; Principal component analysis.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000400518
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Classification of soybean genotypes assessed under different water availability and at different phenological stages using leaf-based hyperspectral reflectance. Repositório Alice
CRUSIOL, L. G. T.; NANNI, M. R.; FURLANETTO, R. H.; SIBALDELLI, R. N. R.; CEZAR, E.; SUN, L.; FOLONI, J. S. S.; MERTZ-HENNING, L. M.; NEPOMUCENO, A. L.; NEUMAIER, N.; FARIAS, J. R. B..
bitstream/item/222042/1/2021-remotesensing-13-00172-v2-classificacao-genotipos.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Glycine max (L) Merrill; Estresse hídrico; Estágios fenológicos; Assinatura espectral; Análise do componente principal; Análise discriminante linear; Refletância hiperespectral; Drought stress; Phenological stages; Spectral signature; Linear discriminant analysis; Hyperspectral reflectance; Soja; Glycine Max; Soybeans; Principal component analysis; Discriminant analysis.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1130862
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Classification of the EU countries labour markets AgEcon
Kaba, Bohumil.
The objective of the paper is to classify the labour markets of the EU member states on the basis of selected employment and unemployment indicators. In order to achieve the study target, the adequate multivariate exploration procedures have been chosen. In the first part of processing original data, principal component analysis (PCA) was employed. PCA is a multivariate statistical procedure used to reduce the number of observed variables into a smaller number of uncorrelated variables with a minimum loss of information. Moreover, the PCA results can be used for effective ranking of the EU countries according to observed indicators of labour markets. This paper describes the crucial steps in PCA and procedure for ranking mentioned and it reviews how...
Tipo: Journal Article Palavras-chave: Classification; Employment; Unemployment; Principal component analysis; Cluster; International Development; Public Economics; Research Methods/ Statistical Methods; GA; IN.
Ano: 2010 URL: http://purl.umn.edu/99227
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