Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae)
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | LOCUS Repositório Institucional da UFV |
Texto Completo: | http://locus.ufv.br/handle/123456789/4055 |
Resumo: | In survival analysis, the response variable is the time of occurrence of an event of interest, denominated failure time. Another characteristic of the survival analysis is to incorporate to the study incomplete sample data, in which for a determined reason the occurrence of the event was not verified, being these data defined as censured. The objective of this paper was to compare the use of the parametric and non-parametric techniques to estimate the survival time of C. externa (Neuroptera: Chrysopidae), predator insect which feed on other insects as well as mite, under the effect of three commercial products nim-based: Neempro (10 g of azadirachtina L-1), Organic neem (3,3 g of Azadirachtina L-1) and Natuneem (1,5 g of azadirachtina L-1). With this objective the survival functions for the different concentrations of each product, through the non-parametric method of Kaplan-Meier were estimated and compared by the logrank test and by parametric techniques, using the Weibull and log-normal exponential tests. Besides that, a study in order to select the most parsimonious model was done, using for that the likelihood ratio test (LRT) as well as the Akaike information criterion (AIC). The estimates of the selected parametric model were used to determine the survival functions in the concentrations of the three products, with the purpose of comparing with the nonparametric estimator Kaplan-Meier. Once the best model was defined the median survival time of C. externa was calculated in the tested concentrations of the products. Taking into consideration the conditions described in this experiment, one can conclude that the concentrations of the nim-based products have influence in the survival of C. externa. The higher the concentration of the used products, the lower was the survival time and among the evaluated products, Neempro was the one which presented the least lethal to the natural predator. |
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Miranda, Marconi Silvahttp://lattes.cnpq.br/2270502181985004Silva, Fabyano Fonseca ehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4766260Z2Venzon, Madelainehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4795615T1Martins Filho, Sebastiãohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723282T5Siqueira, Maria Augusta Limahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4777253E4Ribeiro Junior, José Ivohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723282Y62015-03-26T13:32:15Z2013-03-252015-03-26T13:32:15Z2012-03-13MIRANDA, Marconi Silva. Non-Parametric and Parametric Techniques used in the survival analysis of Chrysoperla externa (Neuroptera: Chrysopidae). 2012. 69 f. Dissertação (Mestrado em Estatística Aplicada e Biometria) - Universidade Federal de Viçosa, Viçosa, 2012.http://locus.ufv.br/handle/123456789/4055In survival analysis, the response variable is the time of occurrence of an event of interest, denominated failure time. Another characteristic of the survival analysis is to incorporate to the study incomplete sample data, in which for a determined reason the occurrence of the event was not verified, being these data defined as censured. The objective of this paper was to compare the use of the parametric and non-parametric techniques to estimate the survival time of C. externa (Neuroptera: Chrysopidae), predator insect which feed on other insects as well as mite, under the effect of three commercial products nim-based: Neempro (10 g of azadirachtina L-1), Organic neem (3,3 g of Azadirachtina L-1) and Natuneem (1,5 g of azadirachtina L-1). With this objective the survival functions for the different concentrations of each product, through the non-parametric method of Kaplan-Meier were estimated and compared by the logrank test and by parametric techniques, using the Weibull and log-normal exponential tests. Besides that, a study in order to select the most parsimonious model was done, using for that the likelihood ratio test (LRT) as well as the Akaike information criterion (AIC). The estimates of the selected parametric model were used to determine the survival functions in the concentrations of the three products, with the purpose of comparing with the nonparametric estimator Kaplan-Meier. Once the best model was defined the median survival time of C. externa was calculated in the tested concentrations of the products. Taking into consideration the conditions described in this experiment, one can conclude that the concentrations of the nim-based products have influence in the survival of C. externa. The higher the concentration of the used products, the lower was the survival time and among the evaluated products, Neempro was the one which presented the least lethal to the natural predator.Em análise de sobrevivência, a variável resposta é o tempo de ocorrência de um evento de interesse, denominado tempo de falha. Outra característica da análise de sobrevivência é incorporar ao estudo dados amostrais incompletos, que por algum motivo a ocorrência do evento não foi verificada, dados estes definidos como censurados. O objetivo deste trabalho foi comparar o uso das técnicas paramétricas e não-paramétricas para estimar o tempo de sobrevivência de C. externa (Neuroptera: Chrysopidae), inseto predador que se alimenta de outros insetos e ácaros, sob efeito de três produtos comerciais à base de nim: Neempro (10 g de azadirachtina L-1), Organic neem (3,3 g de Azadirachtina L-1) e Natuneem (1,5 g de azadiractina L-1). Com esse objetivo foram estimadas as funções de sobrevivência para as diferentes concentrações de cada produto, por meio do método não-paramétrico de Kaplan-Meier, e comparadas pelo teste logrank e por meio das técnicas paramétricas, utilizando os modelos exponencial, de Weibull e log-normal. Foi realizado ainda, um estudo com a finalidade de selecionar o modelo mais parcimonioso, utilizando para isto o teste da razão de verossimilhança (TRV) e o critério de informação de Akaike (AIC). As estimativas do modelo paramétrico selecionado foram usadas para determinar as funções de sobrevivência nas concentrações dos três produtos, com o objetivo de comparar com o estimador não-paramétrico de Kaplan-Meier. Definido o melhor modelo foi calculado o tempo mediano de sobrevivência do C. externa nas concentrações testadas dos produtos. Levando em consideração as condições descritas neste experimento, pode-se concluir que as concentrações dos produtos a base de nim possuem influencia na sobrevivência de C. externa. Quanto maior foi a concentração dos produtos utilizados, menor foi o tempo de sobrevivência e entre os produtos avaliados o Neempro foi o que apresentou ser o menos letal ao predador natural.application/pdfporUniversidade Federal de ViçosaMestrado em Estatística Aplicada e BiometriaUFVBREstatística Aplicada e BiometriaKaplan-MeierModelo exponencialModelo de WeibullModelo log-normalKaplan-MeierExponential modelWeibull modelLog-normal modelCNPQ::CIENCIAS EXATAS E DA TERRA::PROBABILIDADE E ESTATISTICA::ESTATISTICATécnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae)Non-Parametric and Parametric Techniques used in the survival analysis of Chrysoperla externa (Neuroptera: Chrysopidae)info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf512216https://locus.ufv.br//bitstream/123456789/4055/1/texto%20completo.pdffd4223913c0ad60bce75a563695255ecMD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain115155https://locus.ufv.br//bitstream/123456789/4055/2/texto%20completo.pdf.txt426ce079d66355140cbd6df83e28f7fbMD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3552https://locus.ufv.br//bitstream/123456789/4055/3/texto%20completo.pdf.jpg434812ca3d8700482ee1924ae0264aa5MD53123456789/40552016-04-09 23:18:13.206oai:locus.ufv.br:123456789/4055Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-10T02:18:13LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false |
dc.title.por.fl_str_mv |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
dc.title.alternative.eng.fl_str_mv |
Non-Parametric and Parametric Techniques used in the survival analysis of Chrysoperla externa (Neuroptera: Chrysopidae) |
title |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
spellingShingle |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) Miranda, Marconi Silva Kaplan-Meier Modelo exponencial Modelo de Weibull Modelo log-normal Kaplan-Meier Exponential model Weibull model Log-normal model CNPQ::CIENCIAS EXATAS E DA TERRA::PROBABILIDADE E ESTATISTICA::ESTATISTICA |
title_short |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
title_full |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
title_fullStr |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
title_full_unstemmed |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
title_sort |
Técnicas não-paramétricas e paramétricas usadas na análise de sobrevivência de Chrysoperla externa (Neuroptera: Chrysopidae) |
author |
Miranda, Marconi Silva |
author_facet |
Miranda, Marconi Silva |
author_role |
author |
dc.contributor.authorLattes.por.fl_str_mv |
http://lattes.cnpq.br/2270502181985004 |
dc.contributor.author.fl_str_mv |
Miranda, Marconi Silva |
dc.contributor.advisor-co1.fl_str_mv |
Silva, Fabyano Fonseca e |
dc.contributor.advisor-co1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4766260Z2 |
dc.contributor.advisor-co2.fl_str_mv |
Venzon, Madelaine |
dc.contributor.advisor-co2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4795615T1 |
dc.contributor.advisor1.fl_str_mv |
Martins Filho, Sebastião |
dc.contributor.advisor1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723282T5 |
dc.contributor.referee1.fl_str_mv |
Siqueira, Maria Augusta Lima |
dc.contributor.referee1Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4777253E4 |
dc.contributor.referee2.fl_str_mv |
Ribeiro Junior, José Ivo |
dc.contributor.referee2Lattes.fl_str_mv |
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4723282Y6 |
contributor_str_mv |
Silva, Fabyano Fonseca e Venzon, Madelaine Martins Filho, Sebastião Siqueira, Maria Augusta Lima Ribeiro Junior, José Ivo |
dc.subject.por.fl_str_mv |
Kaplan-Meier Modelo exponencial Modelo de Weibull Modelo log-normal |
topic |
Kaplan-Meier Modelo exponencial Modelo de Weibull Modelo log-normal Kaplan-Meier Exponential model Weibull model Log-normal model CNPQ::CIENCIAS EXATAS E DA TERRA::PROBABILIDADE E ESTATISTICA::ESTATISTICA |
dc.subject.eng.fl_str_mv |
Kaplan-Meier Exponential model Weibull model Log-normal model |
dc.subject.cnpq.fl_str_mv |
CNPQ::CIENCIAS EXATAS E DA TERRA::PROBABILIDADE E ESTATISTICA::ESTATISTICA |
description |
In survival analysis, the response variable is the time of occurrence of an event of interest, denominated failure time. Another characteristic of the survival analysis is to incorporate to the study incomplete sample data, in which for a determined reason the occurrence of the event was not verified, being these data defined as censured. The objective of this paper was to compare the use of the parametric and non-parametric techniques to estimate the survival time of C. externa (Neuroptera: Chrysopidae), predator insect which feed on other insects as well as mite, under the effect of three commercial products nim-based: Neempro (10 g of azadirachtina L-1), Organic neem (3,3 g of Azadirachtina L-1) and Natuneem (1,5 g of azadirachtina L-1). With this objective the survival functions for the different concentrations of each product, through the non-parametric method of Kaplan-Meier were estimated and compared by the logrank test and by parametric techniques, using the Weibull and log-normal exponential tests. Besides that, a study in order to select the most parsimonious model was done, using for that the likelihood ratio test (LRT) as well as the Akaike information criterion (AIC). The estimates of the selected parametric model were used to determine the survival functions in the concentrations of the three products, with the purpose of comparing with the nonparametric estimator Kaplan-Meier. Once the best model was defined the median survival time of C. externa was calculated in the tested concentrations of the products. Taking into consideration the conditions described in this experiment, one can conclude that the concentrations of the nim-based products have influence in the survival of C. externa. The higher the concentration of the used products, the lower was the survival time and among the evaluated products, Neempro was the one which presented the least lethal to the natural predator. |
publishDate |
2012 |
dc.date.issued.fl_str_mv |
2012-03-13 |
dc.date.available.fl_str_mv |
2013-03-25 2015-03-26T13:32:15Z |
dc.date.accessioned.fl_str_mv |
2015-03-26T13:32:15Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MIRANDA, Marconi Silva. Non-Parametric and Parametric Techniques used in the survival analysis of Chrysoperla externa (Neuroptera: Chrysopidae). 2012. 69 f. Dissertação (Mestrado em Estatística Aplicada e Biometria) - Universidade Federal de Viçosa, Viçosa, 2012. |
dc.identifier.uri.fl_str_mv |
http://locus.ufv.br/handle/123456789/4055 |
identifier_str_mv |
MIRANDA, Marconi Silva. Non-Parametric and Parametric Techniques used in the survival analysis of Chrysoperla externa (Neuroptera: Chrysopidae). 2012. 69 f. Dissertação (Mestrado em Estatística Aplicada e Biometria) - Universidade Federal de Viçosa, Viçosa, 2012. |
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http://locus.ufv.br/handle/123456789/4055 |
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por |
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Universidade Federal de Viçosa |
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Mestrado em Estatística Aplicada e Biometria |
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UFV |
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BR |
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Estatística Aplicada e Biometria |
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Universidade Federal de Viçosa |
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