Stochastic Dominance
Mostrando 13-19 de 19 artigos, teses e dissertações.
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13. ANÁLISE DE DESEMPENHO DE FUNDOS DE GERENCIAMENTO ATIVO: UM ESTUDO COMPARATIVO / PERFORMANCE ANALYSIS OF ACTIVE MANAGED INVESTMENTS FUNDS A COMPARATIVE STUDY
The scope of this dissertation is the comparison between the meanvariance based performance measurers of active management Brazilian-based stock funds and stochastic dominance of first, second and third orders criteria. 84 funds were considered and the period studied goes from May 1999 to April 2001. For the stochastic dominance calculus a Matlab function wa
Publicado em: 2004
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14. Gene dosage and stochastic effects determine the severity and direction of uniparental ribosomal RNA gene silencing (nucleolar dominance) in Arabidopsis allopolyploids
Nucleolar dominance is an epigenetic phenomenon in which one parental set of ribosomal RNA (rRNA) genes is silenced in an interspecific hybrid. In natural Arabidopsis suecica, an allotetraploid (amphidiploid) hybrid of Arabidopsis thaliana and Cardaminopsis arenosa, the A. thaliana rRNA genes are repressed. Interestingly, A. thaliana rRNA gene silencing is v
The National Academy of Sciences.
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15. Evolutionary Dynamics of Sporophytic Self-Incompatibility Alleles in Plants
The stationary frequency distribution and allelic dynamics in finite populations are analyzed through stochastic simulations in three models of single-locus, multi-allelic sporophytic self-incompatibility. The models differ in the dominance relationships among alleles. In one model, alleles act codominantly in both pollen and style (SSIcod), in the second, a
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16. Reconsidering the null hypothesis: Is maternal rank associated with birth sex ratios in primate groups?
Trivers and Willard hypothesized that vertebrates adaptively vary the sex ratio of their offspring in response to the mother's physical condition [Trivers, R. L. & Willard, D. (1973) Science 179, 90–92]. This hypothesis has produced considerable debate within evolutionary biology. Here we use meta-analysis techniques to evaluate claims that nonhuman primat
National Academy of Sciences.
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17. Genetic Variation in a Heterogeneous Environment. II. Temporal Heterogeneity and Directional Selection
The maintenance of genetic variation is investigated in a finite population where selection at an autosomal locus with two alleles varies temporally between two environments and the heterozygote has an intermediate fitness value. When there is additive gene action and equal selection in both environments, the autocorrelation between subsequent environments m
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18. Methodology and Accuracy of Estimation of Quantitative Trait Loci Parameters in a Half-Sib Design Using Maximum Likelihood
Maximum likelihood methods were developed for estimation of the six parameters relating to a marker-linked quantitative trait locus (QTL) segregating in a half-sib design, namely the QTL additive effect, the QTL dominance effect, the population mean, recombination between the marker and the QTL, the population frequency of the QTL alleles, and the within-fam
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19. Unusual Distribution of Mutations Associated with Serial Bottleneck Passages of Human Immunodeficiency Virus Type 1
Repeated bottleneck passages result in fitness losses of RNA viruses. In the case of human immunodeficiency virus type 1 (HIV-1), decreases in fitness after a limited number of plaque-to-plaque transfers in MT-4 cells were very drastic. Here we report an analysis of entire genomic nucleotide sequences of four HIV-1 clones derived from the same HIV-1 isolate
American Society for Microbiology.