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A note on the connectedness locus of the families of polynomials Pc(z)=z n - cz n-j Anais da ABC (AABC)
Arteaga,Carlos; Alves,Alexandre.
Let j be a positive integer. For each integer n &gt; j we consider the connectedness locus Mn of the family of polynomials Pc(z) = z n - cz n-j, where c is a complex parameter. We prove that lim n→&#8734; Mn = D in the Hausdorff topology, where D is the unitary closed disk {c;|c|<1}.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Julia set; Connectedness locus; Hyperbolic components; Principal components.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100002
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A SENSITIVITY ANALYSIS OF QUALITY OF LIFE INDICES ACROSS COUNTRIES AgEcon
Rahman, Tauhidur; Mittelhammer, Ronald C.; Wandschneider, Philip R..
This paper attempts to provide a comprehensive analysis of interrelationships among the determinants of the Quality of Life (QOL). We show that various measures of well-being are highly sensitive to domains of QOL that are considered in the construction of comparative indices, and how measurable inputs into the well-being indicators are aggregated and weighted to arrive at composite measures of QOL. We present a picture of conditions among the 43 countries of the world with respect to such interrelated domains of QOL as the relationship with family and friends, emotional well-being, health, work and productivity, material well-being, feeling part of one's community, personal safety, and the quality of environment. On the basis of Borda Rule and the...
Tipo: Conference Paper or Presentation Palavras-chave: Quality of life; Domains; Borda rule; Principal components; And rankings; Institutional and Behavioral Economics; I31; D60; D63.
Ano: 2003 URL: http://purl.umn.edu/22045
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Alteração no método centroide de avaliação da adaptabilidade genotípica. Repositório Alice
NASCIMENTO, M.; CRUZ, C.D.; CAMPANA, A.C.M.; TOMAZ, R.S.; SALGADO, C.C.; FERREIRA, R. de P..
O objetivo deste trabalho foi alterar o método centroide de avaliação da adaptabilidade e estabilidade fenotípica de genótipos, para deixá-lo com maior sentido biológico e melhorar aspectos quantitativos e qualitativos de sua análise. A alteração se deu pela adição de mais três ideótipos, definidos de acordo com valores médios dos genótipos nos ambientes. Foram utilizados dados provenientes de um experimento sobre produção de matéria seca de 92 genótipos de alfafa (Medicago sativa) realizado em blocos ao acaso, com duas repetições. Os genótipos foram submetidos a 20 cortes, no período de novembro de 2004 a junho de 2006. Cada corte foi considerado um ambiente. A inclusão dos ideótipos de maior sentido biológico (valores médios nos ambientes) resultou em...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Medicago sativa; Análise gráfica; Componentes principais; Interação genótipos x ambientes; Graphical analysis; Principal components; Genotype x environment interaction.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125770
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AMMI analysis to evaluate the adaptability and phenotypic stability of sugarcane genotypes Scientia Agricola
Silveira,Luís Cláudio Inácio da; Kist,Volmir; Paula,Thiago Otávio Mendes de; Barbosa,Márcio Henrique Pereira; Peternelli,Luiz Alexandre; Daros,Edelclaiton.
Sugarcane (Saccharum sp.) is one of the most important crops in Brazil. The high demand for sugarcane-derived products has stimulated the expansion of sugarcane cultivation in recent years, exploring different environments. The adaptability and the phenotypic stability of sugarcane genotypes in the Minas Gerais state, Brazil, were evaluated based on the additive main effects and multiplicative interaction (AMMI) method. We evaluated 15 genotypes (13 clones and two checks: RB867515 and RB72454) in nine environments. The average of two cuttings for the variable tons of pol per hectare (TPH) measure was used to discriminate genotypes. Besides the check RB867515 (20.44 t ha-1), the genotype RB987935 showed a high average TPH (20.71 t ha-1), general...
Tipo: Info:eu-repo/semantics/article Palavras-chave: G × E interaction; Principal components; Multivariate analysis.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000100005
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ATTRIBUTES OF IDEAL SOIL SUBSTITUTES: RESULTS OF A SURVEY OF DEMAND SECTORS AgEcon
Lohr, Luanne.
This paper describes preferences for attributes of ideal soil substitutes reported by industry demand segments, and relates those attributes to willingness to pay for soil substitutes. Regression results on principal components indicate that concern over product stability, safety and environmental protection induce higher willingness to pay for ideal soil products.
Tipo: Working or Discussion Paper Palavras-chave: Compost; Markets; Principal components; Product attributes; Demand and Price Analysis; Farm Management.
Ano: 1996 URL: http://purl.umn.edu/16719
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BIOPHOTONICS: ACCLIMATION OF PRE-SPROUTED SUGARCANE SEEDLINGS IN PROTECTED ENVIRONMENT REA
Almeida Neto,Luiz A.; Pandorfi,Héliton; Moraes,Alex S.; Guiselini,Cristiane; C. Júnior,José J. Florentino.
ABSTRACT Sugarcane is considered one of the main alternatives for biofuel production and an important product of Brazilian agriculture, so it is indispensable to adopt new techniques for its cultivation and management. Thus, the present study aimed to evaluate the effect of the quality of supplemental lighting, based on light-emitting diode (LED), on the acclimation of pre-sprouted sugarcane seedlings in a protected environment. The experimental design was completely randomized, consisting of three supplemental LED lighting systems, with light proportions of 90% red + 10% blue (R:B 90/10), 80% red + 20% blue (R:B 80/20) and 70% red + 30% blue (R:B 70/30), and a control, with natural solar radiation, with 5 replicates. Multivariate principal component...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Principal components; Light-emitting diode; Supplemental lighting; Solar radiation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000400410
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Breed comparison for heat adaptation in rams using multivariate analysis. Repositório Alice
CRUZ JÚNIOR, C. A. da; LUCCI, C. M.; PERIPOLLI, V.; TANURE, C. B.; SILVA, A. F. da; MENEZES, A. M. de; RAMOS, A. F.; MCMANUS, C..
bitstream/item/183238/1/29741-133577-1-PB.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Canonical average; Discriminant; Principal components; Tree diagram.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1052626
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Characterization and selection of "Maracujá-do-mato" (Passiflora cincinnata mast) morphoagronomic descriptors Rev. Bras. Frutic.
Dutra,Jéssica Alves; Oliveira,Antonio Carlos de; Porto,Antonio Carlos Mota; Mathias,Jéssika Layanne Moreira.
Abstract The present study consists of the in situ characterization and selection of minimal morphoagronomic descriptors in Passiflora cincinnata genotypes. Forty-one quantitative morphoagronomic descriptors were used, divided in “Plant and Leaf”, “Floral” and “Fruit”. Principal component analysis were used to eliminate descriptors that were less important in the study of multivariate dissimilarity among genotypes. The formation of groups was carried out using Ward’s hierarchical grouping method. The importance of the characters was estimated through the participation of the components by Singh’s method (1981) in order to verify the similarity between lower participation variables in the components. For the set of descriptors “Plant and Leaf” the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Principal components; Hierarchical grouping; Singh’s method.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000500801
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Choosing components in the additive main effect and multiplicative interaction (AMMI) models Scientia Agricola
Dias,Carlos Tadeu dos Santos; Krzanowski,Wojtek Janusz.
The additive main effect and multiplicative interaction (AMMI) models allows analysts to detect interactions between rows and columns in a two-way table. However, there are many methods proposed in the literature to determine the number of multiplicative components to include in the AMMI model. These methods typically give different results for any particular data set, so the user needs some guidance as to which methods to use. In this paper we compare four commonly used methods using simulated data based on real experiments, and provide some general recommendations.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Two-way table; Principal components; Simulation.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200009
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Coeficiente de repetibilidade e parâmetros genéticos em capim-elefante. Repositório Alice
CAVALCANTE, M.; LIRA, M. de A.; SANTOS, M. V. F dos; PITA, E. B. A. F.; FERREIRA, R. L. C.; TABOSA, J. N..
O objetivo deste trabalho foi determinar os coeficientes de repetibilidade de caracteres morfofisiológicos em genótipos de capim-elefante (Pennisetum spp.), a partir de dados obtidos durante seis ciclos de avaliação. Foram estimados: número mínimo de medições e parâmetros genéticos. Utilizou-se o delineamento experimental de blocos ao acaso, em arranjo de parcelas subdivididas, com quatro níveis de N (controle, 30, 60 e 90 kg ha-1 por corte) e 16 genótipos de Pennisetum (11 híbridos interespecíficos e cinco cultivares). Os ciclos consistiram de avaliações em 2010 (21/4, 19/7 e 28/9) e 2011 (6/1, 7/4 e 3/8). Os coeficientes de repetibilidade foram de média&#8209;alta magnitude para todas as variáveis, o que indica que houve regularidade entre as medidas...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Capim elefante; Coeficiente de repetibilidade; Herdabilidade; Componentes principais; Principal components; Pennisetum purpureum; Parâmetro genético; Genótipo; Heritability.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/930564
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Comparison between multivariate methods applied for the evaluation of genetic divergence in Cacao (Theobroma cacao L.) BABT
Dias,Luiz Antônio dos Santos; Kageyama,Paulo Yoshio.
Several multivariate methods have been used in divergence analyses of populations. Consistency and relative association among four methods were assessed using a 5 x 5 complete-diallel data involving cacao cultivars. Over a 5-year period, five cultivars were analyzed based upon five yield components. In assessing the divergence of parents only the data obtained from five cacao cultivars were analyzed. Four multivariate statistics presented close association when considered in pairs, in this case the Mahalanobis' (D²) with the mean Euclidean distance obtained from canonical variates (d cv), and mean Euclidean distance (d e) with the mean Euclidean distance obtained from principal components (d pc). In both cases, high correlations (r > 0.95) were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cacao cultivars; Canonical variates; Genetic divergence; Mahalanobis' and mean Euclidean distances; Principal components.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131998000200005
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Egg production evaluation of laying hens by multivariate analysis Arq. Bras. Med. Vet. Zootec.
Ferreira,P.B.; Rorato,P.R.N.; Mello,F.C.B.; Bevilaqua,B.; Macedo,A.; Brittes,L.B.P..
ABSTRACT This study aimed to verify the existence of differences between hens from the Barred Plymouth Rock (PRB) breed and White Plymouth Rock (PRW) breed by multivariate analysis of weekly egg production and cumulative during the years of 1998 and 2010, from the Laboratório de Avicultura (LAVIC) of the Departamento de Zootecnia at the Universidade Federal de Santa Maria (UFSM). For the analysis of the univariate and multivariate variance, the experimental design was completely randomized with two treatments (breed) and 299 repetitions of the PRW breed and 350 of the PRB breed. The parameters analyzed were the weekly productions of eggs per bird from the 21st to the 50th week of age (P21, P22, ..., P50) and production of eggs accumulated being from the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Analysis of multivariate variance; Cluster; Principal components.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000300676
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El crédito rural y las condiciones de vida de las familias rurales en localidades de alta y muy alta marginación del Estado de Campeche. Colegio de Postgraduados
Uc Hernández, Cruz Alberto.
El desarrollo del sistema financiero contribuye a mitigar la pobreza, tiene una función determinante en el crecimiento y desarrollo económico, si bien hay diferentes hipótesis sobre la forma en que ocurre ese efecto. El objetivo del presente estudio fue obtener modelos de respuesta entre la calidad de vida, la competitividad, el desarrollo institucional y la calidad de los servicios financieros rurales, con información obtenida de una encuesta aplicada a 245 productores del estado de Campeche, México. Con el algoritmo de componentes principales, se obtuvieron los índices apropiados y con las técnicas de regresión lineal, se obtuvieron cinco funciones de respuesta y se mostró que las condiciones de vida de las familias rurales están relacionadas...
Palavras-chave: Campeche; Condiciones de vida; Competitividad; Territorio; Financiamiento; Institución; Componentes principales; Living conditions; Competitiveness; Territory; Institutions; Financing; Principal components; Economía; Doctorado.
Ano: 2011 URL: http://hdl.handle.net/10521/636
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Estimating Large-Scale Factor Models for Economic Activity in Germany: Do They Outperform Simpler Models? AgEcon
Dreger, Christian; Schumacher, Christian.
This paper discusses a large-scale factor model for the German economy. Following the recent literature, a data set of 121 time series is used via principal component analysis to determine the factors, which enter a dynamic model for German GDP. The model is compared with alternative univariate and multivariate models. These models are based on regression techniques and considerably smaller data sets. Out-of-sample forecasts show that the prediction errors of the factor model are smaller than the errors of the rival models. However, these advantages are not statistically significant, as a test for equal forecast accuracy shows. Therefore, the efficiency gains of using a large data set with this kind of factor models seem to be limited. Diese Arbeit...
Tipo: Working or Discussion Paper Palavras-chave: Factor models; Principal components; Forecasting accuracy; International Development; E32; C51; C43.
Ano: 2002 URL: http://purl.umn.edu/26321
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Evaluación morfométrica del crecimiento en fenotipos ovinos y su relación con rendimiento en canal. Colegio de Postgraduados
Mendoza Mendoza, Moisés Gerardo.
El objetivo de este estudio fue determinar las diferencias fenotípicas en ovinos utilizando variables morfométricas en el crecimiento, la productividad y el rendimiento en canal. Se evaluaron 36 corderos de las razas Suffolk, Dorset y su cruza tomando en cuenta el sexo, se formaron seis tratamientos. Se realizó análisis de componentes principales (ACP) con 19 variables que interactuaron entre sí y cinco estaciones de medición (0, 10, 20, 35 y 60 días), los resultados sugieren que para una prueba de comportamiento productivo es necesario tener un manejo especial para cada fenotipo por la respuesta al ambiente. Se obtuvieron cinco grupos morfométricos utilizando la dependencia entre las variables; el grupo uno es representado por peso vivo, grupo dos...
Palavras-chave: Morfometría; Componentes principales; Fenotipos ovinos; Morphometry; Principal components; Sheep phenotypes; Ganadería; Maestría.
Ano: 2011 URL: http://hdl.handle.net/10521/558
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Evaluación morfométrica del crecimiento en fenotipos ovinos y su relación con rendimiento en canal. Colegio de Postgraduados
Mendoza Mendoza, Moisés Gerardo.
El objetivo de este estudio fue determinar las diferencias fenotípicas en ovinos utilizando variables morfométricas en el crecimiento, la productividad y el rendimiento en canal. Se evaluaron 36 corderos de las razas Suffolk, Dorset y su cruza tomando en cuenta el sexo, se formaron seis tratamientos. Se realizó análisis de componentes principales (ACP) con 19 variables que interactuaron entre sí y cinco estaciones de medición (0, 10, 20, 35 y 60 días), los resultados sugieren que para una prueba de comportamiento productivo es necesario tener un manejo especial para cada fenotipo por la respuesta al ambiente. Se obtuvieron cinco grupos morfométricos utilizando la dependencia entre las variables; el grupo uno es representado por peso vivo, grupo dos...
Palavras-chave: Morfometría; Componentes principales; Fenotipos ovinos; Morphometry; Principal components; Sheep phenotypes; Ganadería; Maestría.
Ano: 2011 URL: http://hdl.handle.net/10521/558
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Extensão bivariada do índice de confiabilidade univariado para avaliação da estabilidade fenotípica. Repositório Alice
ABREU, S. C. A. de; FERREIRA, D. F.; GURGEL, F. de L.; ABREU, Â. de F. B..
Com o presente trabalho, objetiva-se realizar a derivação teórica da extensão bivariada dos métodos de Annicchiarico (1992) e Annicchiarico et al. (1995) para estudar a estabiidade fenotípica.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Índice de risco; Distribuição normal bivariada; Componentes principais; Reliability index; Bivariate normal distribution; Principal components.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/206401
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Genetic diversity based on morphological data in Panicum maximum hybrids R. Bras. Zootec.
Martuscello,Janaina Azevedo; Braz,Thiago Gomes dos Santos; Jank,Liana; Cunha,Daniel de Noronha Figueiredo Vieira da; Fonseca,Dilermando Miranda da.
The objective of this experiment was to evaluate the genetic divergence between hybrids obtained from 10 sexual genitors of the Panicum maximum breeding program at Embrapa Beef Cattle. For this, the following morphological descriptors were used: plant height, growth habit, leaf aspect, leaf waxiness, hair density on the sheath (DePB) and blade (DePL), degree of hardiness of the hairs on the leaf sheath (DuPB) and blade (DuPL) and length of hairs on the sheath and blade. The characteristics growth habit and waxiness were not included in the analysis for being invariant. The phenotypic correlations were low and, therefore, not used to eliminate variables. By the principal component analysis, an 84.3% accumulation of the variation was observed until the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Discriminating analysis; Optimization method; Principal components; Relative importance of the characteristics; Tocher.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000900002
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Genetic Progress in Winter Wheat Cultivars released in Chile from 1920 to 2000 Chilean J. Agric. Res.
Matus,Iván; Mellado,Mario; Pinares,Marcos; Madariaga,Ricardo; del Pozo,Alejandro.
Wheat (Triticum aestivum L.) is the major crop in terms of planted area and presents the largest distribution in the country covering a wide range of climatic regions. This study assesses the changes of various agronomic traits of winter wheat cultivars released in Chile between 1920 and 2000. A total of 117 winter accessions, representing 45 old and 72 modern cultivars were tested in a humid Mediterranean-type climate, with irrigation, in 2003. Old cultivars were those released before 1960 and modern ones were those released after 1960. Principal component (PC) analysis using 10 agronomic traits clearly separate modern from old cultivars of winter wheat. Comparing modern cultivars with old ones, plant height have been reduced by 25.6%, but others traits...
Tipo: Journal article Palavras-chave: Genetic improvement; Grain quality; Mediterranean environment; Old and new cultivars; Principal components; Yield progress.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300001
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Growth of citrus rootstocks under aluminium stress in hydroponics Scientia Agricola
Pereira,Walter Esfrain; Siqueira,Dalmo Lopes de; Puiatti,Mario; Martínez,Carlos Alberto; Salomão,Luiz Carlos Chamhum; Cecon,Paulo Roberto.
Plants present different degrees of adaptation to aluminium (Al) concentrations in the soil, and the understanding of this characteristic can lead to a viable option for the utilization of acid soils. The objective of this experiment was to evaluate the effects of five Al concentrations (0, 50, 100, 200, and 400 mumol L-1) on the growth of 'Rangpur' lime (Citrus limonia Osbeck) and 'Volkamer' lemon (Citrus volkameriana Hort. ex Tan.), and tangerine rootstocks 'Cleópatra' (Citrus reshni Hort. ex Tan) and 'Sunki' (Citrus sunki Hort. ex Tan.), in hydroponic culture. The treatments were arranged in a randomized block design, with four replications. For all rootstocks, the relative growth rate in terms of plant total fresh matter increased under low and,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus sp.; Relative growth rate; Principal components; Nutrient solution.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100006
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