Genetic Diversity in the Modern Horse Illustrated from Genome-Wide SNP Data

Horses were domesticated from the Eurasian steppes 5,000-6,000 years ago. Since then, the use of horses for transportation, warfare, and agriculture, as well as selection for desired traits and fitness, has resulted in diverse populations distributed across the world, many of which have become or are in the process of becoming formally organized into closed, breeding populations (breeds). This report describes the use of a genome-wide set of autosomal SNPs and 814 horses from 36 breeds to provide the first detailed description of equine breed diversity. FST calculations, parsimony, and distance analysis demonstrated relationships among the breeds that largely reflect geographic origins and known breed histories. Low levels of population divergence were observed between breeds that are relatively early on in the process of breed development, and between those with high levels of within-breed diversity, whether due to large population size, ongoing outcrossing, or large within-breed phenotypic diversity. Populations with low within-breed diversity included those which have experienced population bottlenecks, have been under intense selective pressure, or are closed populations with long breed histories. These results provide new insights into the relationships among and the diversity within breeds of horses. In addition these results will facilitate future genome-wide association studies and investigations into genomic targets of selection. © 2013 Petersen et al.

Optimal impulsive control in a powered Swing-By

This paper studies the problem of applying an impulsive control in a spacecraft that is performing a Swing-By maneuver. The objective is to study the changes in velocity, energy and angular momentum for this maneuver as a function of the three usual parameters of the standard Swing-By plus the three parameters (the magnitude of the impulse, the point of its application and the angle between the impulse and the velocity of the spacecraft) that specify the impulse applied. The dynamics used is the restricted three body problem under the regularization of Lemaitre, made to increase the accuracy of the numerical integration near the primaries. The present research develops an algorithm to calculate the variation of energy and angular momentum in a maneuver where the application of the impulsive control occurs before or after the passage of the spacecraft by the periapsis, but within the sphere of influence of the secondary body and in a non-tangential direction. Using this approach, it is possible to find the best position and direction to apply the impulse to maximize the energy change of the total maneuver. The results showed that the application of the impulse at the periapsis and in the direction of motion of the spacecraft is usually not the optimal solution.

Avaliação da suscetibilidade eletromagnética dos cabos metálicos dos sistemas de supervisão, proteção, comunicação e controle de subestações de alta tensão

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Respiração freno labial em indivíduos com doença pulmonar obstrutiva crônica: revisão da literatura e influência sobre a modulação autonômica cardíaca

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O pensamento de Che Guevara: um homem novo, trabalho e consciência na Revolução Cubana

Pós-graduação em Ciências Sociais - FFC

Controle orbital de satélites artificias com propulsão e uso de gravidade lunar

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

The fiscal impact of trade liberalization and commodity price fluctuation: the case of Dominican Republic, 1980-1998

Includes bibliography

Avaliação da força aplicada à articulação do ombro em cadeirantes durante a manobra de transferência

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Manobra orbital terra-lua-terra

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Encontros próximos: captura gravitacional temporária e esfera de influência

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação dos efeitos de diferentes manobras de fisioterapia respitatória no desfecho de pacientes ventilados mecanicamente

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

História e guerrilha: entre a tradição rural e a prática urbana. O Brasil das décadas de 60 e 70 do século XX

Pós-graduação em História - FCHS

O Brasil e a política estratégica dos Estados Unidos: o fim da Guerra Fria : hemisfério Ocidental, América Latina e as Relações Brasil-Estados Unidos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Manobras ótimas de atitude de satélites artificiais utilizando algoritmos genéticos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise eletromiográfica e de acelerometria na manobra fisioterápica de vibração torácica manual

Pós-graduação em Engenharia Mecânica - FEG