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| Registros recuperados: 140 | |
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| FASIABEN, M. do C. R.; SANTUCCI, J. M.; MAIA, A. G.; ALMEIDA, M. M. T. B.; OLIVEIRA, O. C. de; BARIONI, L. G.. |
| Resumo: Num país com as dimensões do Brasil é muito acentuada a variabilidade dos sistemas de produção agropecuária praticados pelos produtores. Conhecer esta diferenciação é fundamental para propor linhas de pesquisa, desenvolvimento, transferência de tecnologia e políticas públicas apropriadas. Dados do Censo Agropecuário brasileiro de 2006, realizado pelo Instituto Brasileiro de Geografia e Estatística (IBGE), mostram que mais da metade dos estabelecimentos agropecuários do país possuíam pelo menos um bovino, correspondendo a 2,7 milhões de estabelecimentos e 176,1 milhões de cabeças. Este trabalho trata da classificação e caracterização dos municípios produtores de bovinos no Brasil, empregando técnicas de análise multivariada (análise fatorial e de... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Análise fatorial; Análise de cluster; Produção de bovinos; Tipologia de municípios.; Estatística.; Statistics; Cluster analysis; Cattle. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/981008 |
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| MORETTI, C. J. P.; PEIXOTO, B. M.; MOURA, M. F.. |
| A ferramenta TaxTools foi desenvolvida pelo Laboratório de Inteligência Computacional (Labic) do Instituto de Ciência Matemática e de Computação (ICMC) da Universidade de São Paulo (USP), campus de São Carlos, SP, com o objetivo de auxiliar no processo de mineração de textos. Atualmente, ela tem sido mantida e evoluída pelo Laboratório de Inteligência Computacional (LabIC) da Embrapa Informática Agropecuária. Esse tutorial abrange apenas as opções disponíveis na TaxTools, que completam o processo de obtenção de uma taxonomia de tópicos (MOURA et al., 2008); como clusterização, cálculos de medidas intercluster e de joinability, métodos de podas, métodos de visualização de resultados e algumas opções auxiliares. |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Recuperação da informação; Mineração de textos; Agrupamento de documentos; Cortes de agrupamento; Visualização de agrupamentos; Descrição de agrupamentos; Clusterização; Cluster analysis; Information retrieval. |
| Ano: 2010 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/882099 |
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| Lupo, Coralie; Mandard, Yann-vari; Arzul, Isabelle; Francois, Cyrille; Garcia, Celine; Renault, Tristan; Bareille, Nathalie. |
| Current monitoring of exceptional mortality events of oysters in France consists in passive surveillance, leading to delayed investigation of causation by scientists and management by policy makers. Early detection of clusters of mortality events in time and space would increase possibilities for their investigation and management. A space-time cluster analysis of existing mortality notifications in Pacific oysters was conducted in France, Charente sluices, from 2008 to 2010. As an example of potential demographic confounder of clustering, the analyses were adjusted on oyster age. Several clusters were identified in space and time each studied year. Patterns of mortality notifications were consistent with the introduction and spread of a contagious disease... |
| Tipo: Text |
Palavras-chave: Notification; Oyster; Mortality; Cluster analysis; Saptiotemporal. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00058/16915/14393.pdf |
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| Pinto,Benjamin Carvalho Teixeira; Peixoto,Magna Galvão; Araújo,Francisco Gerson. |
| This work aims to analyze changes in the fish assemblages along a longitudinal reaches of the rio Paraíba do Sul, one of the most used Brazilian aquatic systems, to assess the river "health" and to identify eventual recovery trends. Standardized monthly samplings were carried out at six sites, from October 1997 to September 1999, using casting, sieves, seine and gill nets. Three zones were searched: upstream (Z I), downstream (Z III) and nearby the source of pollution (Z II). Three univariate distribution methods were used: ABC (abundance-biomass curves), K-dominance curves, and geometric class's distribution. Additionally, cluster analysis was applied to detect eventual patterns. The ABC and K-dominance curves showed Z II with evident indication of stress... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish community; Neotropical fauna; Pollution; Water quality; ABC curves; Cluster analysis. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200013 |
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| Amabile,Renato Fernando; Faleiro,Fábio Gelape; Vieira,Eduardo Alano; Peixoto,José Ricardo; Capettini,Flávio; Ribeiro Júnior,Walter Quadros. |
| The objective of this work was to quantify the genetic diversity of elite genotypes of irrigated barley in the Brazilian savanna. Thirty elite barley genotypes from Embrapa Cerrados' collection were evaluated using 160 RAPD markers, 12 agronomic traits related to yield components, and 10 malting quality parameters. The genetic dissimilarity matrices based on molecular markers, quantitative traits, and malting quality characters were calculated and a cluster analysis was performed using the unweighted pair-group method with arithmetic mean (UPGMA) as grouping criterion. High genetic diversity among accessions were observed. The estimated genetic dissimilarities were weakly correlated, showing the complementarity of the different character groups. Selection... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hordeum vulgare; Breeding; Cerrado; Cluster analysis; Genetic resources; Selection indices. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000700007 |
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| Macedo,Leandro Roberto de; Cecon,Paulo Roberto; Silva,Fabyano Fonseca e; Nascimento,Moysés; Puiatti,Guilherme Alves; Oliveira,Ana Carolina Ribeiro de; Puiatti,Mario. |
| Abstract: The objective of this work was to identify nonlinear regression models that best describe dry matter accumulation curves over time, in garlic (Allium sativum) accessions, using Bayesian and frequentist approaches. Multivariate cluster analyses were made to group similar accessions according to the estimates of the parameters with biological interpretation (β1 and β3). In order to verify if the obtained groups were equal, statistical tests were applied to assess the parameter equality of the representative curves of each group. Thirty garlic accessions were used, which are kept by the vegetable germplasm bank of Universidade Federal de Viçosa, Brazil. The logistic model was the one that fit best to data in both approaches. Parameter estimates of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium sativum; Cluster analysis; Multivariate clustering curves; Nonlinear models. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000800572 |
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| Oliveira,Elisa Junqueira; Savegnago,Rodrigo Pelicioni; Freitas,Luara Afonso de; Freitas,Anielly Paula; Maia,Suellen Rodrigues; Simili,Flávia Fernanda; Faro,Lenira El; Costa,Ricardo Lopes Dias da; Santana Júnior,Mário Luiz; Paz,Claudia Cristina Paro de. |
| Abstract: The objective of this work was to estimate genetic parameters for traits related to resistance to endoparasites in Santa Inês sheep, for a possible inclusion in sheep breeding programs, as well as to evaluate the additive genetic pattern of the animals using cluster analyzes, in order to assess whether there are groups within the population that can be used as candidates for selection for resistance to endoparasites. The studied traits were: Famacha score, fecal egg counts (FEC), packed cell volume (PCV), total plasma protein (TPP), body condition score (BCS), and body weight (BW). Heritability estimates ranged from 0.17 (0.05) for TPP to 0.31 (0.07) for BCS. The cluster analyzes based on the breeding values identified four clusters. Famacha and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cluster analysis; Famacha; Genetic correlation; Heritability; K-means; Multivariate analysis. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001201338 |
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| NEJAT,N.; SADEGHI,H.. |
| ABSTRACT Taking into consideration that modeling and indicating relationship among traits and variables are among the most useful numerical techniques in the biological and botanical researches, and also undeniable impact of drought and salinity stresses, this research was implemented with the aim to consider change in relationship among the traits under separately drought and salinity stresses related to scarcely distributed medicinal plant called Christ thorn (Ziziphus spina-christi). A glass house experiment was implemented in controlled conditions at the College of Agriculture, Shiraz University, Shiraz, Iran. Five different water stress levels (irrigation at four, six, eight and 10 days intervals, compared to the unstressed control plants with every... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Salinity; Drought; Stepwise regressions; Principal component analysis; Cluster analysis. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000400667 |
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| Jung, Martina. |
| In the present study, CDM host countries are classified according to their attractiveness for CDM non-sink projects. A cluster analysis is conducted based on three different factors determining host country attractiveness (mitigation potential, institutional CDM capacity and general investment climate) in order to elaborate a CDM host country classification. The results suggest that only a small proportion of potential host countries will attract most of the CDM investment. The CDM (non-sink) stars are China, India, Brazil, Argentina, Mexico, South Africa, Indonesia and Thailand. They are followed by attractive countries like Costa Rica, Trinidad and Tobago, Mongolia, Panama, and Chile. While most of the promising CDM host countries are located in Latin... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Clean development mechanism; Kyoto Protocol; Attractiveness; Cluster analysis; Farm Management; Q25; C49. |
| Ano: 2005 |
URL: http://purl.umn.edu/26328 |
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| Arrington, Kendra; Dennis, Jennifer H.; Mazzocco, Michael A.. |
| In Spring 2005 and Fall 2009 consumer surveys were collected in several Metropolitan 4 cities in Indiana and Illinois to explore differences based on psychographic and behavioral 5 characteristics of farmers’ market consumers. Consumer intercept surveys were conducted in: 6 South Bend, IN; Bloomington, IN; Springfield, IL and Peoria, IL. Likert scale questions were 7 analyzed using factor and hierarchical cluster analysis to identify clusters of consumers based on 8 several farmers’ market characteristics. Survey results show that of the 164 Metropolitan 9 surveys analyzed, 85.3% of respondents were Caucasian, 71.9% were between the ages of 35 and 10 64 and 78% were female. Data analysis showed that four clusters were formed: Recreational 11 (42%),... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cluster analysis; Consumers; Farmers’ market; Primary data; Surveys; Agribusiness. |
| Ano: 2010 |
URL: http://purl.umn.edu/93919 |
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| Registros recuperados: 140 | |
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