967 resultados para Odd third order intensity parameters


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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Pós-graduação em Agronomia (Produção Vegetal) - FCAV

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Pós-graduação em Agronomia (Produção Vegetal) - FCAV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Critical exponents that describe a transition from unlimited to limited diffusion for a ratchet system are obtained analytically and numerically. The system is described by a two dimensional nonlinear mapping with three relevant control parameters. Two of them control the non-linearity while the third one controls the intensity of the dissipation. Chaotic attractors appear in the phase space due to the dissipation and considering large non-linearity are characterised by the use of Lyapunov exponents. The critical exponents are used to overlap different curves of average momentum (dynamical variable) onto a single plot confirming a scale invariance. The formalism used is general and the procedure can be extended to different systems.

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In this study, we estimated the heritability (h(2)) of earnings in the Quarter Horse in order to evaluate the inclusion of this trait in breeding programs. Records from 14,754 races of 2443 horses from 1978-2009 were provided by Sorocaba Hippodrome, Sao Paulo, Brazil. All ancestors of the registered horses were included in the pedigree file until the 4th generation. Log-transformed performance measures (LPM) were analyzed for animals aged 2, 3, and 4 years and during their entire career. The h(2) estimates were obtained using a multi-trait model and Gibbs sampling that included the effects of sex, year of race, and animal in all analyses. Five analyses were performed: 1 in which LPM was divided by the number of prizes, 1 in which LPM was divided by the number of race starts, and 3 analyses that included the number of prizes, number of race starts, and both (LPM_cNPS) as covariates. Analysis was performed with and without inclusion of the maternal effect. Models were compared based on the deviance information criterion and LPM_cNPS including maternal effects was found to be the best model. The h(2) estimates and standard deviation obtained using model LPM_cNPS were 0.19 +/- 0.08, 0.21 +/- 0.08, 0.22 +/- 0.09, and 0.21 +/- 0.07 for earnings at 2, 3, and 4 years of age and total career, respectively. Our analyses indicate that earnings are subject to selection and can be included in breeding programs to improve the racing performance of Quarter Horses.

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The prescription of strength training intensity (ST) by maximum repetition (RM) is characterized by a decrease in the number of repetitions in multiple series. Some studies have shown that reductions in the intensity of exercise can optimize the volume of training with similar acute neuromuscular behaviors. The objective of the study was to investigate the acute effect of two different ST intensities on the training volume, maximum voluntary contraction (MVC) and rate of force development (RFD) in elderly women. The study included eight trained women (66.7 ± 6.7 years; 7.6 ± 17.8 kg; 159 cm; 29.33 ± 5.80 kg/m²). They underwent to three experimental conditions: two different intensities of ST (100% and 80% of 15-RM) on a chair for Leg Extension and a control condition. In the condition to 100% of 15 RM, all participants performed three sets to the concentric muscle fatigue, whereas in the condition to 80% involved the use of two sets of 15 repetitions and only the third to the concentric muscle fatigue. The order of experimental conditions was randomized. The MVC and RFD were determined on the basis of the isometric forcetime curve analysis which was obtained by a force transducer fixed on the unit Bonnet Chair, in the pre and after four and ten minutes for each experimental conditions. The total volume was calculated by multiplying the number of repetitions in three sets by the load in kg. Descriptive statistical analysis procedures were employed (mean ± standard deviation) in addition to two-way ANOVA. The level of significance was set at p <0.05. It was neither main effect of moment or condition, nor condition x moment interaction for MVC and RFD. For the total volume, no significant difference was noted between the conditions (100 and 80% of 15-RM). For sustainability of ...(Complete abstract click electronic access below)

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The aim of this work was to evaluate the types of resistance of soybean genotypes to the attack of Spodoptera cosmioides (Walker, 1858), under laboratory conditions. Plants of the soybean genotypes, IAC 100, Dowling, PI 227687, PI 274454, BR 16, IGRA RA 626 RR, PI 227682, BRSGO 8360, IGRA RA 516 RR e P 98Y11 RR, were cultivated in vases and placed in a greenhouse in order to have their leaves used afterwards in free-choice and no-choice no-preference for feeding tests and evaluation of the biological parameters of S. cosmioides fed on the genotypes. For free-choice no preference for feeding test, 10 leaf discs were prepared and placed in Petri dishes equidistantly among themselves, and then two recently-hatched caterpillar per genotype were release in the center of the plate. The same test was performed for third instar larvae, so that one caterpillar per genotype was used. In non-choice test, only one genotype was used in each Petri dish, where two recently-hatched or one third instar caterpillars were released, respectively. For both tests, the attractiveness was assessed at 1, 3, 5, 10, 15, 30, 60, 120, 360, 720 and 1440 minutes after the release of the insects. In addition, the leaf area consumed was evaluated. Randomized blocks design and completely randomized design were used for free-choice and non-choice tests, respectively, with 10 replications. In biology test, recently-hatched larvae were transferred to Petri dishes with leaves of the genotypes, evaluating the period of larvae, pupae and overall (larvae + pupae), viability of larvae, pupae and overall, weight of 12 days-old larvae and 24 hours-old pupae and longevity of the adults. Completely randomized design was used for this test, with 30 replications. Genotypes IGRA RA 516 RR and IGRA RA 626 RR were the least and the most consumed by recently-hatched larvae of S. cosmioides, respectively, in non-choice non-preference for feeding test. Genotypes PI 274454 and PI 227687 were...