Consulta: subjectFacets:"Statistical analysis"
Registros recuperados: 65
Data/hora: 11/06/2024 03:36:49

Clasificación integral de sistemas de cultivo minifundistas irrigados = Classification of small-farm irrigated cropping systems
Provedor de dados: Depósito Institucional Abierto de Documentos Digitales del Colegio de Postgraduados (COLPOS DIGITAL )
Autores: Fortanelli Martínez, Javier; Figueroa Sandoval, Benjamín; González Cossío, Felix Valerio.
En este trabajo se ensaya la aplicación de un principio integral para la clasificación de sistemas de cultivo minifundistas irrigados por bombeo. Se utiliza como herramienta estadística básica el análisis multivariado, con base en las técnicas de componentes principales, de correlación canónica y de conglomerados. Los criterios de clasificación utilizados, acordes con el enfoque integral de la agricultura, son técnicos, económicos y de orientación productiva. Los resultados señalan la existencia hipotética de cinco sistemas de cultivo ubicados dentro de una tendencia que va de aquellos que cultivan principalmente maíz (Zea mays L.) y frijol (Phaseolus vulgaris L.) con técnica tradicional, bajos costos de producción e intenso uso de la fuerza de trabajo...
Tipo: Artículo
Palavras-chave: Sistemas de cultivo; Análisis multivariado; Zea mays; Phaseolus vulgaris; Farming systems; Multivariate analysis; Análisis estadístico; Statistical analysis.
Ano: 2012
URL: http://hdl.handle.net/10521/1753

Repeatability of agronomic and morphological characteristics in ornamental pepper
Provedor de dados: Horticultura Brasileira
Autores: Ribeiro,Wellington S; Costa,Lucas C; Dias,Fabíola S; Silva,Francisco CS; Pinto,Cleide MF; Finger,Fernando L.
Breeding programs seek to reduce the time spent assessing characteristics more times than necessary. However, this reduction should in no way undermine the representativeness and reliability of the information. Thus, an important success factor in breeding programs is the knowledge of the ideal number of assessments needed to evaluate commercially important characteristics in each species or population. In this context, this study aimed to determine the repeatability coefficient of eight biometric traits in four populations of ornamental pepper, seeking to increase the efficiency of evaluation and selection processes. There was no significant influence of the calculation method used over the estimate of the repeatability coefficient. The results indicated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Capsicum; Ornamental plants; Statistical analysis; Breeding; Germplasm.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362015000300352

Biometric and statistical investigations on the cnidoma of the genus Hydra (Cnidaria, Hydrozoa)
Provedor de dados: Iheringia Série Zoologia
Autores: Deserti,Maria I.; Zamponi,Mauricio O.
This paper deals about the nematocysts like a source of biometric information for comparison between the species Hydra vulgaris Pallas, 1766, Hydra vulgaris pedunculata Deserti et al., 2011 and Hydra pseudoligactis (Hyman, 1931). This biometric tool lets us carry out statistical comparisons and adding these results to the identification of specimens from different classificatory groups. In this particular study, we obtained significant differences between species, individuals of each species and nematocysts type when compared the biometry of its nematocysts. Another result was the variation in of particular nematocysts, like atrichous isorhiza and holotrichous isorhiza for the species H. vulgaris in relation to the column size.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nematocysts; Biometry; Statistical analysis.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300008

Borrachas naturais brasileiras II. Borrachas fracas; borrachas de H. benthamiana e H. guianensis.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: WISNIEWSKI, A.; MELO, C. F. M. de.
bitstream/item/59516/1/Miscelanea-7.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Borracha natural; Análise socio-economica; Borracha fraca; Propriedade; Hevea benthamiana; Hevea guianensis; Belém; Manaus; Pará; Amazonas; Brasil; Natural rubber; Socioeconomic analysis; Weak rubber; Property.; Análise Estatística; Hevea Brasiliensis; Tecnologia.; Technology.; Statistical analysis.
Ano: 1981
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/379779

Uso do SOC na análise de curvas de crescimento.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ANDRADE, D. F. de; SINGER, J. da M.
bitstream/item/76084/1/CNPTIA-COM.TEC.-8901-89.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Software científico; Curvas de crescimento.; Análise Estatística.; Computer software; Statistical analysis.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/2306

Uma aplicação do software cientifico "SOC" em programação linear: implementação do método Simplex Revisado.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: NASCIMENTO, M. A. do; PACHECO, O. I. P.
Neste trabalho é apresentada uma implementação do método Simplez Revisado [1], para resolver problemas de programação linear (p.p.l.), utilizando os recursos disponíveis no SOC, software Científico desenvolvido pela EMBRAPA no ámbito do Projeto Fábrica de Software.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Software científico.; Análise Estatística; Programação Linear.; Computer software; Statistical analysis; Linear programming.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/2315

SOC: sôbre a ordenação das medias de mínimos quadrados geradas pelo comando MED do MODLIN.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FESTA, M. N.
bitstream/item/76080/1/CNPTIA-COM.TEC.-8801-88.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Software científico; Comando MED.; Análise Estatística.; Computer software; Statistical analysis.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/2308

Normas DRIS multivariadas para avaliação do estado nutricional de Pimenta-Longa.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: WADT, P. G. S.; SILVA, L. M. da; CATANI, V.
O gênero Piper contém mais de mil espécies que se distribuem no sub-bosque e na vegetação secundária de ?orestas tropicais, principalmente na Ásia e América Tropical (WADT et al., 2004). Na Amazônia Sul-Ocidental o gênero Piper também é abundante, destacando-se entre as espécies conhecidas a pimenta-longa (P. hispidinervum), cujo principal produto comercial é o safrol. Sua produtividade depende da produção de biomassa, do teor de óleo essencial na biomassa e do teor de safrol no óleo essencial. Em condições naturais, a variabilidade do teor de safrol no óleo essencial é baixa, com coe? ciente de variação de 2,58% (MIRANDA, 2001). No outro extremo, a produção de biomassa tem variado sob diferentes condições experimentais de 799 kg ha-1 (SILVA et al., 2001)...
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Normas DRIS; Leaf analysis; Análisis foliar; Sistema integrado de formulación evaluación y monitoreo.; Análisis estadístico; Estatus nutricional; Fertilidad del suelo; Nutrición de las plantas; Nutrição vegetal; Pimenta longa; Piper hispidinervum; Estado nutricional; Análise foliar; Adubação; Fertilidade do solo; Análise estatística; Método estatístico; Plant nutrition; Nutritional status; Soil fertility; Statistical analysis; Diagnosis and Recommendation Integrated System.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1004590

Diagnose foliar e recomendação de adubação para lavouras comerciais.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: WADT, P. G. S.
A pesquisa agropecuária brasileira tem proporcionado, nos últimos 20 anos, importantes avanços no desenvolvimento de técnicas de avaliação do estado nutricional das plantas para o manejo dos sistemas de adubação. Essas técnicas possibilitam uma nova abordagem para o desenvolvimento de sistemas de recomendação de adubação de nutrientes destinados às culturas agrícolas, nos quais o monitoramento nutricional passa a ser um fator decisivo, substituindo a necessidade de condução de ensaios de calibração de adubação por longos períodos e em diferentes locais. Este trabalho apresenta o referencial teórico e prático relacionado ao método do potencial de resposta à adubação, o qual permite utilizar a interpretação do estado nutricional das lavouras na recomendação...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Lavoura comercial; Leaf analysis; Análisis foliar; Normas DRIS; Rendimiento de los cultivos; Sistema integrado de formulación evaluación y monitoreo.; Análisis estadístico; Explotación de venta directa; Fertilidad del suelo; Fertilizantes; Nutrición de las plantas; Nutrição vegetal; Lavoura; Estado nutricional; Análise foliar; Adubação; Fertilidade do solo; Rendimento; Análise estatística; Método estatístico; Plant nutrition; Commercial farms; Crop yield; Fertilizers; Soil fertility; Statistical analysis; Diagnosis and Recommendation Integrated System.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/993571

Uso do SOC na análise de modelos lineares multivariados.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: ANDRADE, D. F de; MOURA, M. F; TERNES, S.
bitstream/item/76201/1/CNPTIA-COM.TEC.-8805-88.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Software científico; Modelos lineares multivariados.; Análise Estatística.; Computer software; Statistical analysis.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/2312

Análise de agrupamento de dados de expressão gênica na Rede Genômica Animal.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: 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

Uma aplicação do SOC na estimação por intervalo do parametro razão de produtos cruzados em tabelas de contingência 2 x 2.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: TERNES, S.; SOLER, J. M. P.
Neste sentido, foi desenvolvido o programa TAB2x2.ENT utilizando os recursos do módulo CM do SOC - Fevereiro/88, o qual fornece, para dados não pareados dispostos em uma tabela 2x2, as estimativas pontuais do parâmetro razão de produtos cruzados, os limites dos intervalos assintáticos de Cornfield (1956) , Ccx (1958) , Wolf (1954) com correção de continuidade e Gart (1962) , comprimento dos intervalos e, para os métodos assintáticos condicionais, os níveis de significância exatos unicaudais e os coeficientes de confiança exatos.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Software científico.; Análise Estatística.; Computer software; Statistical analysis.
Ano: 1988
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/2307

Fatores de forma para 20 espécies florestais comerciais da Amazônia.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FIGUEIREDO, E. O.; SCHROEDER, R.; PAPA, D. de A.
Em plano de manejo florestal, o inventário censitário das árvores, com diâmetro à altura do peito a partir de 30 cm, apresenta como principal objetivo o conhecimento de estimativas de volume comercial de madeira para a atual colheita e árvores potenciais destinadas ao futuro ciclo. O fator de forma é uma opção antiga que deve ser utilizada nas situações em que não se tenha nenhuma informação sobre a forma da árvore ou, ainda, quando for necessário rapidez no trabalho de inventário. Ele fornece estimativas confi áveis, desde que se controle a tipologia florestal, espécie e classe diamétrica. Apesar do conceito simples do fator de forma, são escassos os trabalhos que fornecem informações técnicas dessa natureza para árvores de florestas tropicais que...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Manejo florestal; Fator de forma; Form factor; Factor de forma; Manejo forestal.; Análisis estadístico; Inventario forestal; Biometria; Administração florestal; Análise estatística.; Inventário florestal; Statistical analysis; Forest management; Forest inventory; Biometry.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697548

Uso do SOC para ajuste de modelos log-lineares a dados categorizados.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: REIS, I. M. dos; SINGER, J. da M.
bitstream/item/76193/1/CNPTIA-COM.TEC.-8904-89.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Software científico; Análise de dados categorizados.; Análise Estatística.; Computer software; Statistical analysis.
Ano: 1989
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/2313

Estimativa do percentual de casca e do fator de forma em povoamentos jovens de teca(Tectona grandis L. f.).
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: FIGUEIREDO, E. O.; SCOLFORO, J. R. S.; OLIVEIRA, A. D. de.
Um dos principais objetivos nos diagnósticos florestais é a obtenção de estimativas de volume total e comercial de madeira. Para isso existem metodologias que propiciam diferentes detalhamentos destas informações, como as funções de afilamentos e as equações de volume, dentre outras. Porém, em levantamentos rápidos, o fator de forma e as estimativas de percentual de casca podem ser empregados com segurança. O percentual de casca é um dos aspectos mais importantes no processo de avaliação de povoamentos florestais implantados, visto que, em algumas espécies florestais e em função da idade, o volume de casca representa um significativo percentual do volume total. Para teca, o comércio de toras é feito com base no diâmetro da extremidade mais fina da tora sem...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Teak; Tecnona grandis; Form factor; Fator de forma; Factor de forma; Dendrometry; Análisis estadístico; Corteza; Rodales.; Teca; Povoamento florestal; Análise estatística; Biometria; Casca; Dendrometria.; Forest stands; Bark.; Biometry; Statistical analysis.
Ano: 2005
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/510535

Controle leiteiro reduzido para estimação da produção de leite acumulada na lactação de vacas mestiças no Acre.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: CARNEIRO JUNIOR, J. M.; CAVALCANTE, F. A.; BRAGA, A. P.; PINHEIRO, A. K.
O presente trabalho tem por objetivos definir o número mínimo de controles leiteiros para estimação acurada da produção de leite aos 255 dias de lactação em vacas mestiças Girolando e verificar a adequabilidade da equação oferecida pelo Ministério da Agricultura, Pecuária e Abastecimento (Mapa). Foi simulado um conjunto de dados com informações de 50 rebanhos leiteiros com 10 repetições contendo, em média, 100 vacas em lactação. As lactações foram simuladas de acordo com os parâmetros observados na literatura para a raça Girolando. A simulação continha os controles leiteiros diários até os 255 dias com pico de lactação aos 38 dias e produção média de cinco quilos de leite. Foram comparados protocolos de controle leiteiro com intervalos variando de 7 até...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Raça Girolando; Método de estimação da produção de leite; Statistical Analysis System (SAS); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Vacas lecheras.; Análisis estadístico; Elaboración de leche; Ganado de leche; Productos del cruzamiento; Simulación por computadora; Gado leiteiro; Gado mestiço; Controle leiteiro; Produção leiteira; Estimativa; Análise estatística; Método estatístico; Programa de computador; Dairy cattle; Dairy cows; Crossbreds; Milk production; Statistical analysis; Computer simulation.
Ano: 2016
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1070620

Analise de experimentos com dados repetidos ao longo do tempo ou espaco.
Provedor de dados: Informação Tecnológica em Agricultura (Infoteca-e)
Autores: VIVALDI, L. J.
Em uma grande parte dos experimentos uma variavel resposta e observada ao longo do tempo, do espaco ou de ambos; a analise de cada resposta, isoladamente, e ineficiente pois nao leva em consideracao seu comportamento no tempo ou no espaco e as implicacoes dai advindas. Na analise multivariada, ignora-se que exista uma sequencia no tempo ou no espaco e os testes de significancia sao menos sensiveis do que os proprios da anaalise univariada. Dentro deste contexto, buscam-se procedimentos corretos para a analise de variancia univariada de experimentos que considerem o tempo e o espaco como fatores. As dificuldades de se tomar o tempo e o espaco como fatores ocorrem, porque eles nao sao casualizados, ao contrario dos tratamentos aplicados as unidades...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Análise multivariada; Brasil; Delineamento; Estatístico; Experimento; Modelo estatístico; Statistical methods; Statistics models.; Estatística; Método; Método Estatístico.; Brazil; Statistics.; Statistical analysis.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/555301

Is the choice of conservation measures influenced by the targeted natural habitats? The case of French coastal Natura 2000 sites
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Duhalde, Michel; Levrel, Harold; Guyader, Olivier.
Natura 2000 (N2K) is a European network of protected areas that has grown out of the implementation of the Birds Directive (1979) and the Habitats Directive (1992). To date, the literature focussing on “conservation measures” required by the directives has been scarce. This article contributes to a better understanding of associated practices with regard to these measures in the case of France. We put forward a quantitative approach based on 1378 “action-sheets” randomly extracted from 113 management documents of French Natura 2000 coastal sites. These action-sheets are considered to be the physical embodiment of the notion of the conservation measure itself. The analysis concentrates on the “type” of the proposed measures, expressed in terms of a...
Tipo: Text
Palavras-chave: Natura 2000; Conservation measures; Policy instruments; Coastal; Statistical analysis.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00378/48972/49760.pdf

Comparison of individual-based model output to data using a model of walleye pollock early life history in the Gulf of Alaska
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Hinckley, Sarah; Parada, Carolina; Horne, John K.; Mazur, Michael; Woillez, Mathieu.
Biophysical individual-based models (IBMs) have been used to study aspects of early life history of marine fishes such as recruitment, connectivity of spawning and nursery areas, and marine reserve design. However, there is no consistent approach to validating the spatial outputs of these models. In this study, we hope to rectify this gap. We document additions to an existing individual-based biophysical model for Alaska walleye pollock (Gadus chalcogrammus), some simulations made with this model and methods that were used to describe and compare spatial output of the model versus field data derived from ichthyoplankton surveys in the Gulf of Alaska. We used visual methods (e.g. distributional centroids with directional ellipses), several indices (such as...
Tipo: Text
Palavras-chave: Mathematical models; Statistical analysis; Marine fish; Spatial distributions; Spatial analysis; Individual-based models; USA gulf of alaska; Walleye pollock.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00327/43775/43332.pdf

Statistical analysis of the concentrations of twelve metals in the Ligurian atmospheric aerosol
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Migon, C; Gentili, B; Journel, B.
A correlation analysis based on the concept of singular-value decomposition of a matrix is applied here to an atmospheric aerosol data set, for twelve metals (Al, Ca, Cd, Co, Cu, Fe, Mg, Mn, Na, Ni, Pb and Zn),in the Ligurian Sea coastal environment. An iterative procedure allows atypical samples to be discarded, i.e. samples with characteristics significantly different to those of the whole data set. After five atypical samples have been objectively discarded, the general characteristics of the data set are better described and some features are enhanced according to a decreasing order of importance, For example, the mineral dust character of almost every metal is shown, which points out that the marine recycling component is negligible. Marine (Mg, Na)...
Tipo: Text
Palavras-chave: Mer Ligure; Aérosol atmosphérique; Métaux-traces; Analyse statistique; Ligurian Sea; Atmospheric aerosol; Trace metals; Statistical analysis.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43576/44044.pdf

Measure and mis-measure of species diversity in deep-sea chemosynthetic communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Gauthier, Olivier; Sarrazin, Jozee; Desbruyeres, Daniel.
Our knowledge of species diversity in deep-sea chemosynthetic communities has come a long way since their discovery in the late 1970s, However, their study poses serious challenges that are linked to their remoteness, the variable selectivity and effectiveness of sampling tools in different conditions, a lack of consensus on the size compartments and sieve size used in practice, and the persistent discovery of species that are previously unknown to science. Still, with increasing accessibility and new sampling tools, quantitative data are becoming both more frequent and extensive, reducing limitations in the estimation and comparison of species diversity. Here, we review the literature for common difficulties encountered in the measurement and comparison...
Tipo: Text
Palavras-chave: Deep-sea ecosystems; Chemosynthetic community; Species diversity; Richness; Evenness; Rarefaction; Diversity profiles; Diversity ordering; Alpha diversity; Statistical analysis.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00001/11274/7842.pdf

MOVIES-B: an acoustic detection description software. Application to shoal species' classification
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Weill, Alain; Scalabrin, Carla; Diner, Noel.
Software, MOVIES-B, developed by IFREMER (Institut français de recherche pour l'exploitation de la mer), enables the recognition of echogram features as acoustic detection structures according to spatial-energetic contiguity criteria. These structures (shoals, plankton layers) are described by energetic, morphological, spatial and temporal descriptors. Specifying acoustic detections as individual shoals will allow shoal by shoal echo-integration and may lead to better biomass estimation and shoal species description. The conceptual and operational framework of MOVIES-B is presented in the first part of this paper. The second part presents preliminary work performed in order to assess the feasibility of classification and possible species identification of...
Tipo: Text
Palavras-chave: Echo-intégration; Banc de poissons; Acoustique halieutique; Analyse statistique; Classification hiérarchique; Echo-integration; Fish shoal; Fisheries acoustics; Statistical analysis; Clustering analysis.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00190/30078/28573.pdf

Analyse de l'évolution temporelle de communautés macrobenthiques à partir des probabilités de présence des espèces
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Mante, C; Durbec, Jp; Dauvin, Jc.
Statistical analysis of long-term changes in marine communities generally involves recourse to multivariate methods. Some of these, such as Correspondence Analysis (CA), are very sensitive to the presence of rare species in the data, whereas other methods, such as Principal Components analysis (PCA) or Multidimensional Scaling (MDS) are only sensitive to the dominant species. Thus, it is necessary to identify rare species. We used an original method of species determination, based on a multinomial scheme and permitting the generalization of the classical presence/absence coding from a probabilistic viewpoint. This selection method was applied to the identification of the different categories of species (rare, intermediate or dominant) that constitute the...
Tipo: Text
Palavras-chave: Statistical analysis; Probability; Long-term changes; Macrobenthic community.
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00093/20428/18095.pdf

Effect of subjective choices on the objective analysis of sea surface temperature data in the tropical Atlantic and Pacific oceans
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Molinari, Rl; Festa, Jf.
Many subjective choices are required to perform an objective interpolation (OI) analysis of environmental variables. Herein, we consider the effects on the statistical analysis of sea surface temperature (SST) using (1) a structure function or covariance analysis, (2) different analytical expressions to represent the statistics of the raw data, and (3) different historical SST data sets. The historical data sets are the well-sampled Comprehensive Ocean-Atmospheric Data Set (COADS) and the poorly sampled historical expendable bathythermograph (XBT) data set. Results from these analyses are used to generate error maps for a poorly-sampled, two month XBT array and a proposed well-sampled profiling float array. For the relatively data-rich GOADS analysis,...
Tipo: Text
Palavras-chave: Analyse objective; Température superficielle; Fonction de structure; Analyse statistique; Interpolation objective; Objective analysis; Sea surface temperature; Structure function; Statistical analysis; Objective interpolation.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00325/43573/44041.pdf

Seasonal variation of microbial population from sediments of Vellar Estuary, South India.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lakshmanaperumalsamy, P; Chandramohan, D; Natarajan, R.
A seasonal study on the occurrence and distribution of total aerobic microbial population (TMP), total aerobic heterotrophic bacteria (THB), actinomycetes and fungi in the sediments of Vellar Estuary, South India (11 degree 29'N 79 degree 46'E) was carried out during Jan. to Dec. 1975. Sediment samples were collected at monthly intervals, from 4 stations and analysed microbiologically. In general, bacterial population was found to be dominant followed by actinomycetes and fungi. The max peak for TMP, THB and fungi were recorded in Nov. in all stations. Monsoon season supported TMP, THB and fungi to a high level and it was summer for actinomycetes. Statistical analysis (Kendall's tau) showed a significantly positive correlation among TMP, THB, actinomycetes...
Tipo: Text
Palavras-chave: Actinomycetes; Population number; Statistical analysis; Seasonal variations; Fungi; Bacteria; Sediment analysis; Microbiological analysis.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-943.pdf

Bulletin des statistiques de pêche en ZEE de la République Islamique de Mauritanie en 1987
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Foucher, E.; Damiano, A.
Ce Bulletin préparé par Alain Damiano, Eric Foucher et l'ensemble du personnel du Service Statistique du CNROP présente les statistiques de pêche pour l'année 1987
Tipo: Other
Palavras-chave: Collecte de données; Description des pêcheries; Effort de pêche; Flottille de pêche; Traitement des données; Statistiques des pêches; Statistical analysis; Statistical sampling; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 1989
URL: http://hdl.handle.net/1834/1095

Caractères biométriques de la squille squilla mantis dans les eaux tunisiennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mili, S.; Jarboui, O.; Missaoui, H.
Pour l’étude biométrique de la squille Squilla mantis, un échantillonnage régulier a été réalisé dans le golfe de Tunis, le golfe de Hammamet et le golfe de Gabès de janvier 2005 à décembre 2006. Les équations morphométriques de la squille, dans le golfe de Gabès, ont montré que la croissance relative du telson, celle de la masse totale et celle de la masse éviscérée par rapport à celle du céphalothorax sont caractérisées par une allométrie positive. Par contre, la longueur totale croît négativement par rapport à celle du céphalothorax. Pour le golfe de Hammamet, ces caractères ont une croissance marquée par une allométrie négative à part la masse éviscérée. Les équations morphométriques de la squille du golfe de Tunis ont montré une allométrie positive...
Tipo: Journal Contribution
Palavras-chave: Biometrics; Comparative studies; Population dynamics; Population structure; Statistical analysis; Squilla mantis; Http://aims.fao.org/aos/agrovoc/c_46197.
Ano: 2008
URL: http://hdl.handle.net/1834/4241

Estimación de un índice de abundancia anual de gatuzo (Mustelus schmitti) a partir de datos de la flota comercial argentina. Período 1992-2008
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Pérez, M.; Massa, A.M.; Cordo, H.D.
Patagonian smoothhound (Mustelus schmitti) is one of the predominant cartilaginous fishes of the Argentine Sea (SW Atlantic Ocean). It is caught, mainly, in the coastal multispecific fishery with nearly other 30 bony and cartilaginous species. The group is known as ‘variado costero’. In this work the smoothhound abundance indices (CPUE) and standardized efforts for the 1992-2008 period in the area between 34~’S-42~’S were estimated. The General Lineal Model (GLM) and data derived from the argentine commercial fleet were used. Other aspects that could affect estimates and trends of the annual indices were also analyzed. Mean CPUE values estimated with the GLM, considered as annual standardized abundance indices, show an increasing trend as of 2000; the...
Tipo: Journal Contribution
Palavras-chave: Abundance; Catch/effort; Coastal fisheries; Statistical analysis; Mustelus schmitti; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4881

Estimación cuantitativa del descarte en la pesquería de merluza realizado por la flota comercial argentina
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Dato, C.V.; Bambill, G.A.; Cañete, G.R.; Villarino, M.F.; Aubone, A.
Based on the comparison between length composition of landings and that of research cruises, filtered by the selectivity of the mesh used by the commercial fleet, to rebuild length distribution of catches, an indirect quantitative method was developed and used to estimate, in weight and number, the individuals discarded by the commercial fleet south of 41° S. Discards ranged between 15,563 and 46,113 annual tons in the 1986-1993 period which represented 10-13% in weight and 28-32% in number of actual catches, composed of around 87% of individuals age group 1, 12% of age group 2 and the rest of individuals age groups 0 and 3.
Tipo: Journal Contribution
Palavras-chave: Gadoid fisheries; Commercial fishing; Statistical analysis; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2006
URL: http://hdl.handle.net/1834/1587

Evaluación de la polaca (Micromesistius australis) del Atlántico sudoccidental, período 1987-1999.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Wöhler, O.C.; Cordo, H.D.; Cassia, M.C.; Hansen, J.E.
Taking into account the commercial catches by the Argentine fleet and other fleets that operated around Malvinas Islands (SW Atlantic) in the 1987-1999 period, the current state of southern blue whiting (Micromesistius australis) is assessed. A sequential analysis (Cohort Analysis) tuned, in an ADAPT conceptual framework with six independent indices of abundance, was performed for the southern blue whiting stock of the SW Atlantic. Commercial catch data of the Argentinian fleet and other fleets that operate around Malvinas Islands were used.The indices included catch per unit of effort of different fleets and data from Argentine-British research surveys. The analysis showed that the decreasing trend in biomass observed in previous studies went on during...
Tipo: Journal Contribution
Palavras-chave: Stock assessment; Fishing mortality; Biomass; Demersal fisheries; Statistical analysis; Gadoid fisheries; Stock assessment; Biomass; Demersal fisheries; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2002
URL: http://hdl.handle.net/1834/2546

Les analyses statistiques multivariées : application sur deux espèces de Soleidea des cotes Tunisiennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Glid, A.; Mosbah, S.; Ghorbel, M.; Bradai, M.N.
Une analyse statistique multivariée a été entreprise sur la base de 11 caractères métriques et 10 caractères méristiques de 3 échantillons de Soleidae appartenant à 2 espèces différentes en provenance de 3 localités distinctes : S. aegyptiaca de Sfax et de Djerba et S. senegalensis de Bizerte. Cette étude a montré une différence significative de certains caractères entre les deux espèces d’une part et au sein de la même espèce péchée dans 2 localités différentes. Le recours aux fonctions canoniques a permis d’élaborer des équations pouvant classer un échantillon dans l’espèce adéquate et dans la localité de sa capture. Une étude complémentaire intégrant toutes les espèces de cette famille, morphologiquement très semblable, pourrait être une méthodologie de...
Tipo: Journal Contribution
Palavras-chave: Animal morphology; Fishery regulations; Fishing rights; Meristic counts; Multivariate analysis; Statistical analysis; Taxonomy; Variance analysis; Fishery policies.
Ano: 2009
URL: http://hdl.handle.net/1834/4488

Aplicación estadística en los bioensayos de toxicidad con sedimentos extraído del Estero Salado, canal de acceso al Puerto Marítimo de Guayaquil
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Villamar, F.
With the purpose of proving and determining in a short term the impact of the dredged material that can be caused by the organisms that inhabit the marine-estuary ecosystem, was performed toxicity bioassay of the sediment extracted from the bottom of the Salado Estuary. This sediment obstructs the access channels of the Marítime Port of Guayaquil. For this bioassay, was used white shrimp larvae of the species Litopenaeus vannamei, a commercially important organism that depends for its food on the organic detritus coming from the sediment and the column of estuary water in the studied area. The results obtained were analyzed applying the graphic arithmetic method and statistical analysis, through which it was determined that there is a direct relation...
Tipo: Journal Contribution
Palavras-chave: Bioassays; Toxicity; Marine organisms; Sediments; Statistical analysis; Kurtosis; Dredged samples; Bioassays; Toxicity; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_15731; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2002
URL: http://hdl.handle.net/1834/2257

Sobre los conceptos de utilización de biomasa excedentes de merluza de cola Macruronus magellanicus bajo esquemas de administración pesquera basadas en F 0,1, y F 30. RDP.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ehrhardt, N.M.; Legault, C.; Prenski, L.B.
In this work we present a process of risk analysis related to the adoption of a Total Allowable Catch (TAC)based in series of allowable biological catches which contain uncertainty derived of the recruitment patterns which characterize the stock. With the information obtained by the F0,1, and F30. RDP, the exploitation ratio and with the 500 values of the projected biomass of 1995 obtained by Monte Carlo simulation, we calculate the distribution of the allowable biological catches under a scheme of F0,1, and F30. RDP andfor a natural mortality of 0.38. The selected TAC is expected to beas closer as possible to the reference fishery mortality F0,1, and F30. RDP. As a result of the present risk analysis in this study in Macruronus magellanicus of the SW...
Tipo: Journal Contribution
Palavras-chave: Fishery management; Risks; Biomass; Statistical analysis; Gadoid fisheries; Fishery management; Biomass; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 1997
URL: http://hdl.handle.net/1834/1936

Régimen del oleaje en la zona de Jaramijó y Salinas
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Vera, L.
Mediante el uso de series de tiempo de altura y período de olas, medidas cada tres horas durante aproximadamente 6 años consecutivos, se realizó un análisis estadístico del comportamiento estacional y mensual de las ondas en las localidades de Jaramijó y Salinas, encontrándose que las alturas de olas muestran diferencias estacionales. Los mayores valores se encontraron en la época húmeda (Enero a mayo). Se realizó el análisis espectral de la serie, de donde se deducen los picos de frecuencia más significativos y se determina que el régimen de oleaje, es el mismo en las dos localidades.
Tipo: Journal Contribution
Palavras-chave: Wave period; Spectral analysis; Time series; Statistical analysis; Statistical analysis; Spectral analysis; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_28964.
Ano: 2000
URL: http://hdl.handle.net/1834/2244

Caractères biométriques de la Squille &lt;Squilla mantis&gt; dans les eaux tunisiennes
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mili, S.; Jarboui, O.
Pour l’étude biométrique de la squille Squilla mantis, un échantillonnage régulier a été réalisé dans le golfe de Tunis, le golfe de Hammamet et le golfe de Gabès de janvier 2005 à décembre 2006. Les équations morphométriques de la squille, dans le golfe de Gabès, ont montré que la croissance relative du telson, celle de la masse totale et celle de la masse éviscérée par rapport à celle du céphalothorax sont caractérisées par une allométrie positive. Par contre, la longueur totale croît négativement par rapport à celle du céphalothorax. Pour le golfe de Hammamet, ces caractères ont une croissance marquée par une allométrie négative à part la masse éviscérée. Les équations morphométriques de la squille du golfe de Tunis ont montré une allométrie positive...
Tipo: Journal Contribution
Palavras-chave: Squilla mantis; Biometrics; Comparative studies; Population dynamics; Statistical analysis; Shrimp culture; Statistical analysis; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2008
URL: http://hdl.handle.net/1834/3789

Regeneración de colonias y transplante de fragmentos de Acropora palmata (Cnidaria: Scleractinia) en el Parque Nacional Natural Corales del Rosario, Caribe colombiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: García-U., R. P.; Alvarado-Ch., E. M.; Acosta, A.
El presente trabajo fue realizado con el fin de estudiar la posibilidad de recuperación de la especie de coral Acropora pálmate en el Parque Nacional Natural Corales del Rosario. Se determinó el porcentaje de regeneración de 42 colonias fragmentadas mecánicamente y la sobrevivencia de 53 fragmentos de esta especie. El tiempo de regeneración del tejido coralino para 25 colonias fragmentadas entre septiembre y diciembre de 1992 (período 1), fue de 3 meses; para las 17 colonias fragmentadas entre marzo y mayo de 1993 fue de 2 meses. Los fragmentos obtenidos de las colonias donantes fueron sometidos a 4 tratamientos. El tratamiento 1 consistió en el amarre con pita del fragmento a coral muerto y el traslado hacia Isla Kalua. Para el tratamiento 2, se colocaron...
Tipo: Journal Contribution
Palavras-chave: Ecology; Condition factor; Survival; Regeneration; Statistical analysis; Ecology; Statistical analysis; Survival; Regeneration; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_7538; Http://aims.fao.org/aos/agrovoc/c_6486.
Ano: 1995
URL: http://hdl.handle.net/1834/3773

Estudio de las características sedimentológicas de la zona costera frente al balneario de Manta, Ecuador
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Soledispa P., B.
se estudian 17 muestras de sedimentos superficiales de fondo de la zona costera de Manta. Se presentan las características sedimentológicas en base al análisis granulométrico, parámetros estadísticos y distribución de los sedimentos. Se establece que los sedimentos arenosos predominan en el área, y se ubican en el lado oeste y este del área de estudio. También hay limo y mezclas de este con arena.
Tipo: Journal Contribution
Palavras-chave: Sediments; Sediment distribution; Granulometry; Statistical analysis; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2009
URL: http://hdl.handle.net/1834/3363

Polymorphisme intraspécifique chez le syngnathe aiguille, &lt;Syngnathus acus&gt; (osteichthyes, syngnathidae) des eaux Tunisennes (Méditérranée centrale)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Ben Amor, M. M.; Ben Salem, M.; Capapé, C.
De juin 2002 à juin 2005, 267 syngnathes aiguilles, &lt;Syngnathus acus&gt; Linnaeus, 1758, ont été récoltés dans les eaux tunisiennes: 204 dans Bahiret El Biban (Tunisie méridionale), 24 dans la lagune Sud de Tunis et 39 devant La Goulette (Tunisie septentrionale). Trois types d'études ont été effectués à partir de l’ensemble des variables biométriques: la première repose sur l'analyse de la variance et de la moyenne à l'aide du test "F" de Ficher et du test "t" de Student; la deuxième est fondée sur l’analyse de la multivariance (ANOVA); et la troisième est fondée sur des analyses multidimensionnelles. La première et la deuxième études ont montré des différences significatives dans les variances et les moyennes pour la plupart des caractères examinés,...
Tipo: Journal Contribution
Palavras-chave: Biometrics; Biopolymorphism; Population genetics; Statistical analysis.
Ano: 2008
URL: http://hdl.handle.net/1834/4234

Introducción al análisis Bayesiano
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Hernandez, D.R.
An introduction to the Bayesian Analysis is presented and conceptual aspects highlighted. Initially, the probability concept is analyzed from its objective perspective such as frequency, and from its subjective perspective such as degree of belief. It is discussed how, within the context of Bayesian statistics, probability as degree of belief allows to give sense to the probability of a hypothesis and, therefore, enables to resolve problems of scientific interest that could not be otherwise addressed. The likelihood concept is discussed and the Bayes formula, which integrates a priori information and knowledge with information provided by current data demonstrated. Basic concepts of the Decision Theory within the Bayesian perspective are introduced. The...
Tipo: Book
Palavras-chave: Statistical analysis; Statistical models; Fishery resources; Stock assessment; Prediction; Probability theory; Statistical analysis; Stock assessment; Fishery resources; Prediction; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_29367.
Ano: 2007
URL: http://hdl.handle.net/1834/2560

Analyse de la variabilité spatio-temporelle des populations phytoplanctoniques observées dans le réseau national de surveillance du phytoplancton dans le golfe de Gabés
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Feki-Sahnoun, W.
Le long des côtes du golfe de Gabès, les données collectées dans le cadre du Réseau de Surveillance du Phytoplancton et des Phycotoxines (REPHY), constituent une base pertinente pour examiner la structure et la dynamique des communautés phytoplanctoniques à grandes échelles temporelle (1997-2007) et géographique (l’ensemble de littoral du golfe). S’appuyant sur les données du REPHY, l’objectif de cette étude était de décrire les principales formes de variabilité des communautés phytoplanctoniques observées sur nos côtes.  Les schémas de la variabilité des populations phytoplanctoniques ont été examinés à différentes échelles temporelles et géographiques à l’aide de méthodes statistiques multivariées. Dans un premier temps, l’analyse de la dynamique des...
Tipo: Theses and Dissertations
Palavras-chave: Phytoplankton; Temporal variations; Geographical distribution; Statistical analysis; Models.
Ano: 2013
URL: http://hdl.handle.net/1834/5444

Impact of agro-industrial activities on the water quality of River Nyando, Lake Victoria Basin, Kenya
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Raburu, P. O.; Okeyo-Owuor, J.B.
The impact of agro-industrial activities on the water quality within River Nyando, Lake Victoria Basin (Kenya) was studied at different hierarchical levels between August 1997 and June 1999. Triplicate water samples were collected on a monthly basis from various stations ranging from the source to the mouth of the river and analyzed for selected physical and chemical water quality parameters using standard analytical methods. Statistical analysis was performed using MINITAB and STATISTICA computer packages. Agricultural land use was found to be the major factor contributing to changes in water quality. Salinity and pH varied at river basin scale, turbidity, TDS and conductivity at catchment scale, while DO, alkalinity and pH at subcatchment and river reach...
Tipo: Proceedings Paper
Palavras-chave: Water quality; Environmental impact; Industrial wastes; Inland waters; Rivers; Anthropogenic factors; River basin management; Statistical analysis; Physicochemical properties; Land use; Limnological data; Environmental monitoring; Resource management; Environment management; Agricultural pollution; Water quality; Environmental impact; Rivers; Statistical analysis; Land use; Environmental monitoring; Industrial wastes; Inland waters; Anthropogenic factors; Physicochemical properties; Resource management; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_4182; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_11763; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_13330; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006
URL: http://hdl.handle.net/1834/3501

Applying a non-parametric bootstrap technique to assess the accuracy of biomass estimates of argentine anchovy (Engraulis anchoita) northern stock (34º S-41º S) with the Daily Egg Production Method. 1993-2008 period
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Pájaro, M.; Hansen, J.E.; Leonarduzzi, E.
Engraulis anchoita northern stock reproductive biomass (SSB) during the 1993-2008 period was estimated applying the Daily Egg Production Method (DEPM) and accuracy of estimates assessed using a bootstrap technique (SW Atlantic Ocean, Argentine Sea). The basic data were collected in different research surveys carried out in late Spring, at the peak of the spawning season. The aim of this work was to build reliable confidence intervals around the estimates of the mean reproductive biomass applying a non-parametric bootstrap method. Resampling methods are becoming increasingly popular as statistical tools as they are robust and do not require the assumption of any particular distribution of the basic data. This is especially relevant when assessing the DEPM...
Tipo: Journal Contribution
Palavras-chave: Spawning; Stocks; Fecundity; Biomass; Statistical analysis.
Ano: 2013
URL: http://hdl.handle.net/1834/5494

Análisis de clasificación de series temporales: el caso de la salinidad en la Ciénaga Grande de Santa Marta
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Giraldo-H., R.; Martínez-C., J.; Hurtado-T., L.H.; Zea, S.; Madera-R., E.R.
Se realizó una clasificación numérica de 21 estaciones de monitoreo del sistema laguno -estuarino comprendido por la Ciénaga Grande de Santa Marta y el Complejo Pajarales, de acuerdo a su similaridad en el comportamiento de la salinidad del agua. Se utilizó información quincenal comprendida entre enero de 1987 y octubre de 1991. Debido a la estructura de autocorrelación de los datos fue necesario emplear los modelos ARIMA de series de tiempo en primer lugar, y posteriormente aplicar una técnica de clasificación normal con los coeficientes de la representación infinita AR calculados para cada estación. Los resultados del análisis fueron coherentes con las hipótesis planteadas acerca de la distribución de la variable en el sistema.
Tipo: Journal Contribution
Palavras-chave: Ecology; Salinity effects; Autocorrelation; Monitoring; Coastal lagoons; Estuaries; Statistical analysis; Ecology; Monitoring; Estuaries; Statistical analysis; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_4911; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_7378; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1995
URL: http://hdl.handle.net/1834/3813

Critical values of nitrogen indices in tomato plants grown in soil and nutrient solution determined by different statistical procedures
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Fontes,Paulo Cezar Rezende; Ronchi,Cláudio Pagotto.
The objective of this study was to establish critical values of the N indices, namely soil-plant analysis development (SPAD), petiole sap N-NO3 and organic N in the tomato leaf adjacent to the first cluster (LAC), under soil and nutrient solution conditions, determined by different statistical approaches. Two experiments were conducted in randomized complete block design with four repli-cations. Tomato plants were grown in soil, in 3 L pot, with five N rates (0, 100, 200, 400 and 800 mg kg-1) and in solution at N rates of 0, 4, 8, 12 and 16 mmol L-1. Experiments in nutrient solution and soil were finished at thirty seven and forty two days after transplanting, respectively. At those times, SPAD index and petiole sap N-NO3 were evaluated in the LAC. Then,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lycopersicon esculentum; Nitrogen fertilizers; Plant soil relations; Statistical analysis.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2002001000010

STATISTICAL COMPARATIVE PETIOL ANATOMY OF Salvia SP.
Provedor de dados: Planta Daninha
Autores: ÖZDEMIR,A.; ÖZDEMIR,A.Y.; YETISEN,K.
ABSTRACT In this study, petiol anatomy of 17 Salvia sp. taxa were compared statistically. In all the studied taxa, some differences were found in the petiole shape, number of vascular bundles and the presence of chlorenchyma. Anatomical variations in 17 Salvia taxa have been investigated by means of numerical methods (Analysis of variance and Pearson correlation). By the analysis of the investigated taxa from 17 leaf anatomy related characters, it has been determined that epidermis width and trachea diameter are the best character pairs which represent the variations in them. It has been also found that the results from numerical analysis of the leaf anatomy characters can provide additional evidences that correspond to the anatomy for the recognition of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Lamiaceae; Petiole; Salvia; Statistical analysis.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300465

A comparative analysis of the technical efficiency of rain-fed and smallholder irrigation in Ethiopia
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Makambe,   Godswill; Namara,   Regassa E.; Hagos,   Fitsum; Awulachew,   Seleshi Bekele; Ayana,   Mekonnen; Bossio,   Deborah A.
Agriculture is the most significant contributor to Ethiopia’s economy. Most of the agricultural production is under rainfed conditions and thus extremely sensitive to rainfall variability. Irrigation development, including smallholder irrigation, is used by the Ethiopian Government to attempt to mitigate the effects of rainfall variability. In this study, we look at smallholder irrigation - modern and traditional irrigation systems. A detailed description of the cropping patterns is given. The stochastic frontier production function approach is used to estimate technical inefficiency, and constraints to production are analyzed. Since the traditional system is found to be efficient but on a lower production frontier, the study shows that significant gains...
Tipo: Working or Discussion Paper
Palavras-chave: Rainfed farming; Irrigated farming; Efficiency; Irrigation schemes; Small scale systems; Cropping patterns; Crop production; Economic aspects; Statistical analysis; Agricultural and Food Policy; Crop Production/Industries; Production Economics.
Ano: 2011
URL: http://purl.umn.edu/118298

Patterns of Pass-through of Commodity Price Shocks to Retail Prices
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Berck,   Peter; Leibtag,   Ephraim S.; Villas-Boas,   Sofia Berto; Solis,   Alex.
Commodity prices have been rising at unprecedented rates over the last two years.  The primary objective of this paper is to assess if and how firms pass through upstream cost increases to final good prices.  First, we investigate what happens to the shelf prices (the regular prices) of goods that contain significant amounts of a commodity whose price has changed.  The objective is to document patterns of price rigidity depending on the share of the commodity in the final good that is sold to consumers.  For example, given an abnormal commodity price change in wheat, what happens to the shelf regular price of bread, wheat cereals, and other goods that contain wheat?  Commodity pass-through patterns for ready to eat cereal (smallest share of commodity in...
Tipo: Working or Discussion Paper
Palavras-chave: Commodity prices; Retail prices; Statistical analysis; Consumer/Household Economics; Demand and Price Analysis; Research Methods/ Statistical Methods.
Ano: 2009
URL: http://purl.umn.edu/51600

A comparative analysis of the technical efficiency of rain-fed and smallholder irrigation in Ethiopia
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Makombe,   Godswill; Namara,   Regassa E.; Hagos,   Fitsum; Awulachew,   Seleshi Bekele; Ayana,   Mekonnen; Bossio,   Deborah A.
Agriculture is the most significant contributor to Ethiopia’s economy. Most of the agricultural production is under rainfed conditions and thus extremely sensitive to rainfall variability. Irrigation development, including smallholder irrigation, is used by the Ethiopian Government to attempt to mitigate the effects of rainfall variability. In this study, we look at smallholder irrigation - modern and traditional irrigation systems. A detailed description of the cropping patterns is given. The stochastic frontier production function approach is used to estimate technical inefficiency, and constraints to production are analyzed. Since the traditional system is found to be efficient but on a lower production frontier, the study shows that significant gains...
Tipo: Working or Discussion Paper
Palavras-chave: Rainfed farming; Irrigated farming; Efficiency; Irrigation schemes; Small scale systems; Cropping patterns; Crop production; Economic aspects; Statistical analysis; Crop Production/Industries; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/113012

A VIDÉKI TURIZMUS SZEREPE AZ ÉSZAK-MAGYARORSZÁG RÉGIÓBAN, KÜLÖNÖS TEKINTETTEL A VIDÉKFEJLESZTÉSRE A 2007-13. ÉVI AGRÁR- ÉS VIDÉKPOLITIKA TÜKRÉBEN
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: David,   Lorant; Toth,   Geza; Kelemen,   Nora; Kincses,   Aron.
Észak-Magyarország három megyéje közül Borsod-Abaúj-Zemplén megyé-ben a legjelentősebb a magánszállásadás szerepe, a vendéglátók 50,5%-a találha-tó itt, Hevesben 41,6%-a, miközben Nógrád megyében 7,9%-a. Észak-Magyarország magánszállás férőhelyeinek eloszlása a 2005-ös adatokat vizsgálva területileg meglehetősen egyenlőtlen. A magánszálláshelyeken belül a 2005-ös adatok alapján a falusi szállásadás szálláshelyei 58%-ot tesznek ki, mellyel a régió eltér az országos megoszlástól. A legtöbb mutató vonatkozásában megállapítottuk, hogy a régió megyéinek falusi szállásadással, illetve magánszállásadással rendelkező települései társadalmi-gazdasági fejlettsége, illetve folyamatai sok tekintetben kedvezőtlenebbek az ilyen szállásadással rendelkező települések...
Tipo: Journal Article
Palavras-chave: Vidéki turizmus; Falusi szállásadás; Fizetővendéglátás; Statisztikai elemzés; Versenyképesség; Countryside tourism; Village accommodation; Commercial hospitality; Statistical analysis; Competitiveness; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2007
URL: http://purl.umn.edu/57687

Technical Compendium: Descriptive Agricultural Statistics and Analysis for Zambia in Support of the USAID Mission’s Feed the Future Strategic Review
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Sitko,   Nicholas J.; Chapoto,   Antony; Kabwe,   Stephen; Tembo,   Solomon; Hichaambwa,   Munguzwe; Lubinda,   Rebecca; Chiwawa,   Harrison; Mataa,   Mebelo; Heck,   Simon; Nthani,   Dorothy.
This technical compendium was developed to serve two interrelated purposes: 1.To assist in the development of USAID Zambia’s Feed the Future (FtF) strategy by providing a broad empirical analysis of the current conditions and historical trends shaping Zambia’s agricultural and food sector; and 2. To serve as a technical reference for organizations tasked with designing and implementing programs associated with FtF.
Tipo: Working or Discussion Paper
Palavras-chave: Zambia; Feed the Future; FtF; Statistical analysis; Agricultural and Food Policy; Food Security and Poverty; Research Methods/ Statistical Methods.
Ano: 2011
URL: http://purl.umn.edu/104016

A Comparison Of Characteristics Of Forest and Farm Cooperative Members
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Berlin,   Christina; Erikson,   Ljusk Ola.
The forest owner cooperatives in Sweden were established almost a century ago with the aim to improve the private forest owners’ bargaining situation and improve silviculture (the study, cultivation, and management of forest trees). The characteristics of today’s private forest owners and forest industry are changing, something which should encourage the forest owner cooperatives to consider adaptations of their organizations. The aims of this paper are, first, to describe characteristics of forest owner cooperative members and second, to probe the applicability of farm cooperative research in this venture. The statements that are tested are based on characteristics established in farm cooperative research and refer to (i) a negative relation between...
Tipo: Journal Article
Palavras-chave: Private forest owners; Cooperative theory; Statistical analysis; Member’s age; Property size; Transaction; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/46580

An Evaluation of the Use of Statistical Procedures in Soil Science
Provedor de dados: Revista Brasileira de Ciência do Solo
Autores: Tavares,Laene de Fátima; Carvalho,André Mundstock Xavier de; Machado,Lucas Gonçalves.
ABSTRACT Experimental statistical procedures used in almost all scientific papers are fundamental for clearer interpretation of the results of experiments conducted in agrarian sciences. However, incorrect use of these procedures can lead the researcher to incorrect or incomplete conclusions. Therefore, the aim of this study was to evaluate the characteristics of the experiments and quality of the use of statistical procedures in soil science in order to promote better use of statistical procedures. For that purpose, 200 articles, published between 2010 and 2014, involving only experimentation and studies by sampling in the soil areas of fertility, chemistry, physics, biology, use and management were randomly selected. A questionnaire containing 28...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Statistical analysis; Means test; Misuse of statistics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100307

Environmental variables influencing the expression of morphological characteristics in clones of the forage cactus
Provedor de dados: Revista Ciência Agronômica (RCA)
Autores: Barbosa,Marcela Lúcia; Silva,Thieres George Freire da; Zolnier,Sérgio; Silva,Sérvulo Mercier Siqueira e; Ferreira,Williams Pinto Marques.
ABSTRACT The environmental factors that affect the morphological characteristics of different genera of cacti are little known. The aim of this study therefore was to analyse the contribution of environmental variables to growth in cladodes and plant of forage cactus clones of the genera Nopalea and Opuntia. The data used in this study were obtained from an experiment conducted in Serra Talhada, Pernambuco, Brazil, between 2012 and 2013, where the clones 'IPA Sertânia' (Nopalea), 'Miúda' (Nopalea) and 'Orelha de Elefante Mexicana' (Opuntia) were submitted to different irrigation depths (2.5, 5.0 and 7.5 mm) and fixed irrigation intervals (7, 14 and 28 days). Morphological characteristics of the cladodes and plants and weather variables were obtained over...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Statistical analysis; Nopalea sp; Opuntia sp; Weather variables.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300399

Analyzing one-way experiments: a piece of cake of a pain in the neck?
Provedor de dados: Scientia Agricola
Autores: Kozak,Marcin.
Statistics may be intricate. In practical data analysis many researchers stick to the most common methods, not even trying to find out whether these methods are appropriate for their data and whether other methods might be more useful. In this paper I attempt to show that when analyzing even simple one-way factorial experiments, a lot of issues need to be considered. A classical method to analyze such data is the analysis of variance, quite likely the most often used statistical method in agricultural, biological, ecological and environmental studies. I suspect this is why this method is quite often applied inappropriately: since the method is that common, it does not require too much consideration-this is how some may think. An incorrect analysis may...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Analysis of variance; Assumptions; Graphical statistics; Multiple comparisons; Normal distribution; Non-parametric statistics; One-way designs; Statistical analysis.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000400020

Survey of statistical methods applied in articles published in Acta Scientiarum. Agronomy from 1998 to 2016
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Possatto Junior, Omar; Bertagna, Filipe Augusto Bengosi; Peterlini, Edicarlos; Baleroni, Alessandra Guedes; Rossi, Robson Marcelo; Zeni Neto, Hugo.
Statistics is the main science by which researchers validate the results of scientific work, and the choice of an inadequate statistical method may lead to conclusions that are considered questionable by reviewers. This study had the objective of describing the characteristics of the statistical methods used in the papers published in Acta Scientiarum. Agronomy from 1998 to 2016 as part of a a critical analysis of the journal to pinpoint possible failures in the application of these methods. All scientific articles (n = 1,237) published in the journal were surveyed, of which 54.1% addressed areas of crop production. The mean comparison methods were the most commonly used (75.5%) and, consequently, they represented the highest proportion of errors (60.8%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Statistical analysis; Comparison of means; Parametric methods; Revisão estatística.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42641

GENES - a software package for analysis in experimental statistics and quantitative genetics - doi: 10.4025/actasciagron.v35i3.21251
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Cruz, Cosme Damião; Universidade Federal de Viçosa.
GENES is a software package used for data analysis and processing with different biometric models and is essential in genetic studies applied to plant and animal breeding. It allows parameter estimation to analyze biological phenomena and is fundamental for the decision-making process and predictions of success and viability of selection strategies. The program can be downloaded from the Internet (http://www.ufv.br/dbg/genes/genes.htm or http://www.ufv.br/dbg/biodata.htm) and is available in Portuguese, English and Spanish. Specific literature (http://www.livraria.ufv.br/) and a set of sample files are also provided, making GENES easy to use. The software is integrated into the programs MS Word, MS Excel and Paint, ensuring simplicity and effectiveness in...
Palavras-chave: Software; Statistical analysis; Genetic analysis; Quantitative genetics; Biometry software  análise estatística  análise genética  genética quantitativa  biometria.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/21251

GenomicLand: Software for genome-wide association studies and genomic prediction
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Azevedo, Camila Ferreira; Nascimento, Moysés; Fontes, Vitor Cunha; Silva, Fabyano Fonseca e; Resende, Marcos Deon Vilela de; Cruz, Cosme Damião.
 GenomicLand is free software intended for prediction and genomic association studies based on the R software. This computational tool has an intuitive interface and supports large genomic databases, without requiring the user to use the command line. GenomicLand is available in English, can be downloaded from the Internet (https://licaeufv.wordpress.com/), and requires the Windows or Linux operating system. The software includes statistical procedures based on mixed models, Bayesian inference, dimensionality reduction and artificial intelligence. Examples of data files that can be processed by GenomicLand are available. The examples are useful to learn about the operation of the modules and statistical procedures.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Statistical analysis; Genomic analysis; Molecular markers; Biometrics.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/45361

GenomicLand: Software for genome-wide association studies and genomic prediction
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Azevedo, Camila Ferreira; Nascimento, Moysés; Fontes, Vitor Cunha; Silva, Fabyano Fonseca e; Resende, Marcos Deon Vilela de; Cruz, Cosme Damião.
 GenomicLand is free software intended for prediction and genomic association studies based on the R software. This computational tool has an intuitive interface and supports large genomic databases, without requiring the user to use the command line. GenomicLand is available in English, can be downloaded from the Internet (https://licaeufv.wordpress.com/), and requires the Windows or Linux operating system. The software includes statistical procedures based on mixed models, Bayesian inference, dimensionality reduction and artificial intelligence. Examples of data files that can be processed by GenomicLand are available. The examples are useful to learn about the operation of the modules and statistical procedures.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Statistical analysis; Genomic analysis; Molecular markers; Biometrics.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/45361

Effective engineering properties in the design of storage structures of postharvest dry bean grain
Provedor de dados: Acta Scientiarum: Agronomy
Autores: Kibar, Hakan; Igdir University; Öztürk, Turgut; Igdir University; Temizel, Kadir Ersin; Ondokuz Mayis University.
Selected engineering properties (physical and mechanical) of dry bean under non-irrigation and drip-irrigation were determined and compared. These properties are necessary for the design of equipments for harvesting, processing, transporting, estimating loads in storage structures for crops and flow problems in silos such as arching, ratholing, irregular flow and segregation. Some engineering characteristics such as: average length, width, thickness, the geometric mean diameter, sphericity, surface area, volume, thousand grain mass (M1000), bulk and true densities, porosity, angle of internal friction, static coefficient of friction, Poisson ratio and pressure ratio were studied. The highest average values for physical properties were recorded at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agricultural Engineering dry bean; Physical properties; Mechanical properties; Statistical analysis.
Ano: 2014
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/19394

Near accidents with agricultural vehicles, machinery and equipment in Austria in the year 2013
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Kogler, Robert.
Near accidents are in the lowest stage of the accident pyramid. A near accident is defined as an unplanned event, which includes a potential accident risk, but does not bring any injury or property damage with it. The consideration of near accident plays a very significant role in accident prevention. Near accident research provides an acceptable tool to determine safety deficiencies, potential risks and hidden dangers in various work areas early enough to avoid actual accidents. The aim of the study was to identify safety weaknesses of agricultural and forestry vehicles, machinery and equipment which almost led to an accident with workers in agriculture and forestry in Austria. Also to detect weaknesses and deficits in the design to derive improvements in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Work safety; Ergonomics Near accidents; Agricultural machinery; Near accident analysis; Statistical analysis.
Ano: 2015
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3087

Accident at work with fertilizer distributors in Austrian agriculture
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Kogler, Robert; Quendler, Elisabeth; Boxberger, Josef.
Accidents with fertilizer distributors at work happen in the Austrian agriculture every year.  In accordance with Machinery Directive 2006/42/EC and the standards ISO 4254-1 and DIN EN 14017, fertilizer distributors undergo a risk assessment before construction and market entry to ensure their complying with these legal recommendations and to eliminate largely the risk of injury for the operators.  To determine the accident scenarios, causes, and technical solutions, a narrative analysis of 14 reports of accidents that led to moderate and serious injuries from 2008 to 2010 was done, eight victims interviewed, and seven accident machines and eight new ones, which were sold in 2013, evaluated according to applicable regulations.  Mostly farm managers were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Work safety; Ergonomics Agricultural machinery; Fertilizer distributors; Accident analysis; Statistical analysis.
Ano: 2014
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2941

Some factors that may affect the physical-chemical properties of blueberries
Provedor de dados: Agricultural Engineering International : The CIGR e-journal
Autores: Guiné, Raquel P.F.; Gonçalves, Christophe; Gonçalves, Fernando; Costa, Daniela.
The aim of the present study was to investigate the effect of different production and conservation factors on some properties of blueberries. Among the production factors considered were cultivar (Duke, Bluecrop and Ozarkblue) and production mode (organic or conventional). Regarding the conservation factors were evaluated temperature (ambient or refrigeration) and storage time (0, 7 and 14 days). The properties under study belong to three categories: physical properties (color and texture); chemical properties (moisture content, sugars and acidity) and phenolic and antioxidant properties (total phenols, anthocyanins, tannins, ABTS antioxidant activity, DPPH antioxidant activity).The results revealed that moisture content was only influenced by cultivar...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food industry; Food properties; Food engineering blueberry; Cultivar; Conservation; Production mode; Statistical analysis.
Ano: 2016
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3833

Use of the correlation coefficient in agricultural sciences: problems, pitfalls and how to deal with them
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Kozak,Marcin; Krzanowski,Wojtek; Tartanus,MaŁgorzata.
This paper discusses a number of aspects concerning the analysis, interpretation and reporting of correlations in agricultural sciences. Various problems that one might encounter with these aspects are identified, and suggestions of how to overcome these problems are proposed. Some of the examples presented show how mistaken and even misleading the interpretation of correlation can be when one ignores simple rules of analysis.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Experimental design; Linearity; Path analysis; Simpson's paradox; Statistical analysis.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400029

Epidemiological aspects of acquired immunodeficiency syndrome in older Brazilians: a comparative approach
Provedor de dados: Brazilian Journal of Infectious Diseases
Autores: Carvalho,Luiz Max Fagundes de; Câmara,Fernando Portela.
OBJECTIVES: To compare epidemiological aspects of young (15 to 49 years old) and older (more than 50 years old) AIDS patients. METHODS: We analyzed 511,633 AIDS cases notified to the Brazilian Ministry of Health in the period of 1980-2008 looking at sex, age ranges, educational level and exposure category. Patients were divided into three age groups: under 15, from 15 to 49 and over 50 years old. Using a comparative approach, we analyzed data with regard to category of exposure, education (expressed in years of schooling), and sex ratio among younger (15-49) and older adults (over 50 years old). Time series data were log-transformed and normalized, and the temporal trend was evaluated. RESULTS: AIDS incidence is increasing among people over 50 years old in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acquired immunodeficiency; Syndrome; Health of the elderly; Statistical analysis; Epidemiology; Risk factors.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000100006

Comments on the paper "c-erbB-2 expression and nuclear pleomorphism in canine mammary tumors"
Provedor de dados: Brazilian Journal of Medical and Biological Research
Autores: Metze,K.; Adam,R.L.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Canine mammary tumors; Nuclear pleomorphism; Statistical analysis; Scientific methods; C-erbB-2 expression; MIB-1 expression.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000200001