Geometric Locus
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. Situações de aprendizagem: a circunferência, a mediatriz e uma abordagem com o Geogebra
The research reported here describes a qualitative research, which was based in the Theory of Didactic Situations and in assumptions concerning the use of teaching strategies mediated by technologies in geometry. The didactic sequence proposed in this study aims to enable the participants, students in ninth grade of elementary school and first year of high s
Publicado em: 2010
-
2. Contextualização taxonômica, tafonômica e morfométrica dos remanescentes ósseos da megamastofauna da Gruta Cuvieri (MG), um sítio paleontológico do Pleistoceno tardio / Taxonomic, taphonomic and morphometric contextualization of the megamastofauna bone remains from Cuvieri Cave (MG), a Late Pleistocene Palaeontological Site.
The limited knowledge regarding the Brazilian megafauna (due to a mainly taxonomist tradition of brazilian paleontologists) and the lack of controlled stratigraphic excavations of paleontological sites in Brazil motivated the excavations of Cuvieri Cave, Minas Gerais, using an unprecedented method of excavation in the country, based on detailed exhumation of
Publicado em: 2008
-
3. Constitutive Expression of the Vi Polysaccharide Capsular Antigen in Attenuated Salmonella enterica Serovar Typhi Oral Vaccine Strain CVD 909
Live oral Ty21a and parenteral Vi polysaccharide vaccines provide significant protection against typhoid fever, albeit by distinct immune mechanisms. Vi stimulates serum immunoglobulin G Vi antibodies, whereas Ty21a, which does not express Vi, elicits humoral and cell-mediated immune responses other than Vi antibodies. Protection may be enhanced if serum Vi
American Society for Microbiology.
-
4. Evolutionarily Stable Mutation Rate in a Periodically Changing Environment
Evolution of mutation rate controlled by a neutral modifier is studied for a locus with two alleles under temporally fluctuating selection pressure. A general formula is derived to calculate the evolutionarily stable mutation rate μ(ess) in an infinitely large haploid population, and following results are obtained. (I) For any fluctuation, periodic or rando
-
5. Optimal Recombination Rate in Fluctuating Environments
The optimal recombination rate which maximizes the long-term geometric average of the population fitness is studied for a two-locus haploid model, assuming that the fitnesses of genotypes AB, Ab, aB and ab are 1 + s(t), 1 - s(t), 1 - s(t), and 1 + s(t), respectively, where s(t) follows various stationary stochastic processes with the average zero. With posi
-
6. Evolution under Fertility and Viability Selection
Evolution at a single multiallelic locus under arbitrary weak selection on both fertility and viability is investigated. Discrete, nonoverlapping generations are posited for autosomal and X-linked loci in dioecious populations, but monoecious populations are studied in both discrete and continuous time. Mating is random. The results hold after several genera