9 documents found, page 1 of 1
Feasibility of the expectation-maximization algorithm for assessing individuals...
Oliveira, Larissa Karolina de; Resende, Mariana; Borém, Flávio Meira; Cirillo, Marcelo AngeloThe results of sensory evaluations of coffees are associated with latent factors, such as the particular subjectivity of each individual. Based on the foregoing, assessing the quality of a sensory panel for product discrimination basically depends on the statistical methodology to be used in data analysis. Following this argument, this study aimed to evaluate the feasibility of the EM - Expectation Maximization...
Proposal of a metric selection index for correspondence analysis: an applicatio...
Costa, Adilson Silva da; Resende, Mariana; Nakano, Eduardo Yoshio; Cirillo, Marcelo Angelo; Borém, Flávio Meira; Ribeiro, Diego EgídioCorrespondence analysis is a multivariate dimensionality-reduction technique applied to data structured into contingency tables. The main outcome of this approach is the generation of perceptual maps aimed at the study of similarity between categorical levels. In most cases, interpretations of these similarities present subjectivity when different metrics are considered; e.g., Hellinger distance and Chi-square....
Generalized estimating equations to evaluate the dependence of lifetime in conf...
Brighenti, Carla Guimarães; Miranda, Yola Serpa; Resende, Mariana; Cirillo, Marcelo Angelo; Brighenti, Deodoro MagnoOs bioensaios laboratoriais para avaliar o tempo de vida de Apis mellifera têm algumas particularidades, pois cada unidade amostral contém um grupo de abelhas confinadas em uma gaiola. O presente estudo teve como objetivo realizar uma análise longitudinal para avaliar o efeito da dependência do tempo de vida entre abelhas confinadas alimentadas com diferentes dietas. Foi utilizado o método de estimação de equaç...
A new approach to simple correspondence analysis with emphasis on the violation...
Costa, André Luís Alves; Brighenti, Carla Regina Guimarães; Cirillo, Marcelo AngeloThe main hypothesis of correspondence analysis is given by the independence between the levels of categorical variables. Due to violation of this hypothesis, this study aims to improve the technique of correspondence analysis, providing a new approach for the calculation of the coordinates through the residual incorporation by tables in which categories have different levels of correlation. For this purpose, th...
Evaluation of sensory panels of consumers of specialty coffee beverages using t...
Liska, Gilberto Rodrigues; Menezes, Fortunato Silva de; Cirillo, Marcelo Angelo; Borém, Flávio Meira; Cortez, Ricardo Miguel; Ribeiro, Diego EgídioAutomatic classification methods have been widely used in numerous situations and the boosting method has become known for use of a classification algorithm, which considers a set of training data and, from that set, constructs a classifier with reweighted versions of the training set. Given this characteristic, the aim of this study is to assess a sensory experiment related to acceptance tests with specialty c...
Post-harvest operations and physicochemical and sensory quality of coffees
Clemente, Aline Consolação Sampaio; Cirillo, Marcelo Angelo; Malta, Marcelo Ribeiro; Caixeta, Franciele; Pereira, Cristiane CarvalhoThe effects of post-harvest processing and drying operations and storage conditions are relevant factors for consideration in assessing coffee quality. In this respect, depending on the processing and drying conditions, coffee beans may undergo changes in their physicochemical composition, with a direct affect on beverage quality and, consequently, sensory assessment. Univariate statistical techniques are usual...
Análise de sobrevivência aplicada ao desenvolvimento do pulgão Aphis gossypii G...
da Costa Zache, Ronelza Rodrigues [UNESP]; Carvalho, Geraldo Andrade; Cirillo, Marcelo Angelo; Carvalho, Cesar Freire; Zache, Bruno [UNESP]Made available in DSpace on 2013-09-27T14:53:18Z (GMT). No. of bitstreams: 1 WOS000297940500011.pdf: 1077727 bytes, checksum: d0c9e12db1b22f04cbfe408ceab85ff0 (MD5) Previous issue date: 2011-01-01; Made available in DSpace on 2013-09-30T17:48:03Z (GMT). No. of bitstreams: 1 WOS000297940500011.pdf: 1077727 bytes, checksum: d0c9e12db1b22f04cbfe408ceab85ff0 (MD5) Previous issue date: 2011-01-01; Submitted by Vitor...
A study of the score test in discrimination poisson and zero-inflated poisson m...
Silva, Vanessa Siqueira Peres da; Cirillo, Marcelo Angelo; Cespedes, Juliana GarciaIn many experimental situations the sample may present excess zero observations and generally are used probabilistic models for zero inflated to represent them. However no one knows precisely the amount of zero observations that these models support. Depending on the sample size and null observations number the Poisson model can be used. Based on this question, the objective of this paper is to evaluate the pro...
Evaluating the power and the size of multivariate Levene’s test using Monte Car...
Cirillo, Marcelo Angelo; Ferreira, Daniel Furtado; Sáfadi, ThelmaThis work aimed to evaluate the I-type error rate and the power of Levene’s multivariate test using different location parameters to compare k covariance matrices. Monte Carlo’s simulation and bootstrap were used for this purpose. Configurations were considered with different degrees of correlations, heterogeneity of covariance matrices, sample sizes and number of variants. Results showed that Levene’s multivar...