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Search Results: 1 - 10 of 13930 matches for " Ant?nio Feriani Branco "
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DEGRADA O RUMINAL DA MATéRIA SECA, DA PROTEíNA BRUTA E DA FRA O FIBRA DE SILAGENS DE MILHO E DE CAPIM-ELEFANTE
Lindomar Luiz Sarti,Clóves Cabreira Jobim,Antnio Feriani Branco,Fábio Jacobs
Ciência Animal Brasileira , 2006,
Abstract: O trabalho foi realizado na Fazenda Experimental de Iguatemi, da Universidade Estadual de Maringá, com o objetivo de avaliar a degradabilidade ruminal in situ da matéria seca (MS), da proteína bruta (PB) e da fibra de detergente neutro (FD)N da silagem de milho e de silagens de capim-elefante (Pennisetum purpureum Schum.) cv. Cameroon, inoculadas com inoculante enzimo-bacteriano (SCE-IEB) e inoculante bacteriano (SCE-IB). A degradabilidade potencial (DP) da MS e da FDN foi superior (P<0,05) para as silagens de milho e SCE-IEB em rela o a SCE-IB, fato também observado para a degradabilidade efetiva (DE) da PB. Os valores observados para DP da MS, da PB e FDN para as silagens de milho, SCE-IEB e SCE-IB foram: 79,13%; 76,52% e 69,00%; 80,88%; 79,99% e 71,42%; 80,88%; 80,00% e 60,51%, respectivamente. A SCE-IB foi a que apresentou as maiores taxas da fra o n o-degradável, tanto para MS como para PB e FDN. Entre as silagens de capim-elefante, SCE-IEB apresentou os melhores resultados de degradabilidade ruminal, o que pode ser atribuído, em parte, à a o do inoculante enzimo-bacteriano. PALAVRAS-CHAVE: Degradabilidade efetiva, nitrogênio amoniacal, silagem de gramíneas.
O programa de Literatura Portuguesa do ensino secundário: O último reduto?
António Branco
Revista Portuguesa de Educa??o , 2001,
Abstract: The syllabus of the new subject of Portuguese Literature in secondary schools contrasts vividly with that of Portuguese Language in several respects. Unlike the latter, it cherishes the literary text and its teaching, and suggests methodologies in keeping with aesthetic learning process, without effacing the knowledge fostered by traditional literary studies. Unfortunately, it will only reach a small minority of students.
O uso da estatística de qui-quadrado no controle de processos
Costa, Antnio Fernando Branco;Magalh?es, Maysa Sacramento de;
Gest?o & Produ??o , 2005, DOI: 10.1590/S0104-530X2005000200010
Abstract: it is standard practice to use joint charts in process control, one designed to detect shifts in the mean and the other to detect changes in the variance of the process. in this paper, we propose the use of a single chart to control both mean and variance. based on the noncentral chi square statistic, the single chart is faster in detecting shifts in the mean and increases in variance than its competitor, the joint "xbar" and r charts. the noncentral chi square statistic can also be used with the ewma procedure, particularly in the detection of small mean shifts, accompanied or not by slight increases in variance.
Monitoring the mean vector and the covariance -matrix of multivariate processes with sample means and sample ranges
Costa, Antnio Fernando Branco;Machado, Marcela Aparecida Guerreiro;
Produ??o , 2011, DOI: 10.1590/S0103-65132011005000029
Abstract: the joint and r charts and the joint and s2 charts are the most common charts used for monitoring the process mean and dispersion. with the usual sample sizes of 4 and 5, the joint and r charts are slightly inferior to the joint and s2 charts in terms of efficiency in detecting process shifts. in this article, we show that for the multivariate case, the charts based on the standardized sample means and sample ranges (mrmax chart) or on the standardized sample means and sample variances (mvmax chart) are similar in terms of efficiency in detecting shifts in the mean vector and/or in the covariance matrix. user's familiarity with the computation of sample ranges is a point in favor of the mrmax chart. an example is presented to illustrate the application of the proposed chart.
Monitoring the mean vector and the covariance -matrix of multivariate processes with sample means and sample ranges Monitoramento do vetor de médias e da matriz de covariancias de processos multivariados baseado nas médias e nas amplitudes amostrais
Antnio Fernando Branco Costa,Marcela Aparecida Guerreiro Machado
Produ??o , 2011,
Abstract: The joint and R charts and the joint and S2 charts are the most common charts used for monitoring the process mean and dispersion. With the usual sample sizes of 4 and 5, the joint and R charts are slightly inferior to the joint and S2 charts in terms of efficiency in detecting process shifts. In this article, we show that for the multivariate case, the charts based on the standardized sample means and sample ranges (MRMAX chart) or on the standardized sample means and sample variances (MVMAX chart) are similar in terms of efficiency in detecting shifts in the mean vector and/or in the covariance matrix. User's familiarity with the computation of sample ranges is a point in favor of the MRMAX chart. An example is presented to illustrate the application of the proposed chart. Os gráficos conjuntos de e R e e S2 s o os mais utilizados para o monitoramento da média e da dispers o do processo. Com os tamanhos de amostra usuais de 4 e 5, os gráficos de e R em uso conjunto s o ligeiramente inferior aos gráficos de e S2 em uso conjunto em termos da eficiência em detectar altera es no processo. Neste artigo, mostra-se que para o caso multivariado, os gráficos baseados nas médias amostrais padronizadas e amplitudes amostrais (gráfico MRMAX) ou nas médias amostrais padronizadas e variancias amostrais (gráfico MVMAX) s o similares em termos da eficiência em detectar altera es no vetor de médias e/ou na matriz de covariancias. A familiaridade do usuário com o cálculo de amplitudes amostrais é um aspecto favorável do gráfico MRMAX. Um exemplo é apresentado para ilustrar a aplica o do gráfico proposto.
Stenosoma stephenseni sp. n. (Isopoda, Idoteidae), from the southwestern Mediterranean, with a note on the nomenclatural status of Synisoma Collinge, 1917
António Santos,Raquel Xavier,Saliha Zenboudji,Tristao Branco
ZooKeys , 2011, DOI: 10.3897/zookeys.141.1376
Abstract: Recent collections of isopods in Alboran Island and Algeria included several specimens of the species Stenosoma stephenseni sp. n. This is the fourteenth species described in the genus Stenosoma Leach, 1814. Examination of two specimens collected during the Danish oceanographic cruises of the Thor (1908–10) close to the Galite Islands, and identified as S. acuminatum Leach, 1814, revealed that both belong to S. stephenseni sp. n. In light of these findings, the Mediterranean records of S. acuminatum are revised, and it is proposed that S. acuminatum is a strictly Atlantic species. An updated diagnosis for the genus Stenosoma is given, together with a key for the identification of its species. The nomenclatural status of the name Synisoma Collinge, 1917 is addressed, and although it is in prevailing usage, it is shown that Stenosoma Leach, 1814 is the valid name of the genus.
Monitoring the Mean Vector and the Covariance Matrix of Bivariate Processes
Marcela Aparecida Guerreiro Machado,Antnio Fernando Branco Costa
Brazilian Journal of Operations & Production Management , 2010,
Abstract: This paper proposes the joint use of two charts based on the non-central chi-square statistic (NCS statistic) for monitoring the mean vector and the covariance matrix of bivariate processes, named as the joint NCS charts. The expression to compute the ARL, which is defined as the average number of samples the joint charts need to signal an out-of-control condition, is derived. The joint NCS charts might be more sensitive to changes in the mean vector or, alternatively, more sensitive to changes in the covariance matrix, accordingly to the values of their design parameters. In general, the joint NCS charts are faster than the combined T2 and |S| charts in signaling out-of-control conditions. Once the proposed scheme signals, the user can immediately identify the out-of-control variable. The risk of misidentifying the out-of-control variable is small (less than 5.0%).
Gráfico de controle MCMAX para o monitoramento simultaneo do vetor de médias e da matriz de covariancias
Costa, Antnio Fernando Branco;Machado, Marcela Aparecida Guerreiro;Claro, Fernando Antnio Elias;
Gest?o & Produ??o , 2010, DOI: 10.1590/S0104-530X2010000100012
Abstract: the control chart and the generalized variance |s| chart are used for monitoring the mean vector and the covariance matrix of multivariate processes. in this article, we propose the use of a single chart for monitoring bivariate processes, that is, the mcmax control chart based on a new statistic, which corresponds to the maximum among four sample values: the standardized sample means (in module) and the standardized sample variances (weighted). the sample means and sample variances are well known by the users; the same cannot be said for the hotelling's statistic or the generalized variance. consequently, they will prefer to use the proposed chart instead of the joint and |s| charts. in general, the user prefers to wait until the occurrence of a second point beyond the control limit (not far from the first one) before interfering in the process. with this new rule, the proposed chart is faster in signaling out-of-control conditions, except when the correlation between the two quality characteristics is too high. in this case, the joint and |s| charts are faster is signaling assignable causes that only affect one of the two quality characteristics, changing its mean and/or increasing its variance.
Understanding Tremor in Rapid Upper Limb Movements Using 3D Accelerometers Data  [PDF]
Paula Pascoal-Faria, Miguel Patrício, Adriana Leal, Francisco Caramelo, António Freire, Cristina Januário, Miguel Castelo-Branco
Neuroscience & Medicine (NM) , 2014, DOI: 10.4236/nm.2014.55024
Abstract: Tremor is a manifestation of a variety of human neurodegenerative diseases, notably Parkinson’s disease (PD) and Essential Tremor (ET), both affecting millions worldwide. PD is primarily caused by a progressive loss of dopamine neurons in the nigrostriatal system that leads to widespread motor symptoms such as bradykinesia, rigidity, tremor and postural instability. ET typically involves a tremor of the arms, hands or fingers. No definitive test or biomarker is yet available for PD or ET, so the rate of misdiagnosis is relatively high. As tremor is a very common feature at the onset of both diseases, it is crucial to be able to characterize it. This is made possible using acce?lerometers to quantify the tremor amplitude and frequency. In this work we aim to find tasks involving upper limb movements that are suitable to modulate both types of tremor. Four tasks were tested, differing on whether the arms moved together or alternatingly and whether loads were added. Significant differences in tremor measures were found when patients were asked to perform simultaneous rapid arms movements with loads placed on their wrists. These results may allow the design of an efficient fMRI protocol for identifying the cortical circuits responsible for the modulation of tremor.
An efficient methodology for the synthesis of 3-styryl coumarins
Martins, Sérgio M. A.;Branco, Paula C. S.;Pereira, António M. D. R. L.;
Journal of the Brazilian Chemical Society , 2012, DOI: 10.1590/S0103-50532012000400014
Abstract: regioselective and highly efficient heck arylation of 3-vinyl-6,7-dimethoxycoumarin has been developed to afford 3-styryl coumarins in good to very high yields. the increase in conjugation reflects on the absorbance of the synthesized compounds revealing all pronounced bathochromic shifts and hyperchromic effects.
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