Modified Gravity Away from a Λ\LambdaCDM Background

Within the effective field theory approach to cosmic acceleration, the background expansion can be specified separately from the gravitational modifications. We explore the impact of modified gravity in a background different from a cosmological constant plus cold dark matter ($\Lambda$CDM) on the stability and cosmological observables, including covariance between gravity and expansion parameters. In No Slip Gravity the more general background allows more gravitational freedom, including both positive and negative Planck mass running. We examine the effects on cosmic structure growth, as well as showing that a viable positive integrated Sachs-Wolfe effect crosscorrelation easily arises from this modified gravity theory. Using current data we constrain parameters with a Monte Carlo analysis, finding a maximum running $|\alpha_M|\lesssim 0.03$. We provide the modified {\tt hi\_class} code publicly on GitHub, now enabling computation and inclusion of the redshift space distortion observable $f\sigma_8$ as well as the No Slip Gravity modifications.Comment: 14 pages, 13 figures. Matches published version in JCAP, LCDM discussion adde

The RBP's mission in the continuing medical education

Universidade de São Paulo Departamento de PsiquiatriaDuke University Departamento de Psicologia e NeurociênciaUniversidade Federal doRio de Janeiro Instituto dePsiquiatria Departamento de Psiquiatria e Medicina LegalUniversidade de São Paulo Faculdade de Medicina Instituto de PsiquiatriaUniversidade Federal do Rio Grande do Sul Departamento de PsiquiatriaUniversidade Federal de São Paulo (UNIFESP) Departamento de PsiquiatriaUNIFESP, Depto. de PsiquiatriaSciEL

Controle do nematóide Aphelenchoides besseyi das sementes de arroz

Six trials were carried out at Lorena and Pindamonhangaba, SP, Brazil, to study the control of the rice nematode Aphelenchoides besseyi Christie 1942, for irrigated conditions. Some chemicals and one thermal treatment were effective in decreasing nematode density; nevertheless, there was no association with yield increases. The cultivars IR 841, IAC 435, IAC 120 and IAC 899 were very tolerant to nematode with yields prominence of IAC 899. Em seis experimentos conduzidos nos municípios de Lorena e Pindamonhangaba, SP, procurou-se verificar o efeito de tratamentos químicos e térmico de sementes sobre o nematóide Aphelenchoides besseyi Christie 1942, em condições de cultivo irrigado. Alguns produtos e o tratamento térmico reduziram o nível populacional do nematóide, porém não houve associação entre os dados de redução e aumento na produção. As cultivares utilizadas, IR 841, IAC 435, IAC 120 e IAC 899, demonstraram elevada tolerância ao nematóide, com destaque de produtividade da IAC 899

Closed orbits and the harmonic Manev potential

Velten H, Sampaio RV. Closed orbits and the harmonic Manev potential. Revista Brasileira de Ensino de Fisica. 2009;31(1): 1301.We study conditions for the existence of closed orbits in three distinct potentials. Firstly, we confirm well known conditions for the Manev problem. In a second step, inspired by the result of Bertrand's theorem, we construct a harmonic Manev potential with a harmonic oscillator term instead of the Newtonian one. As in the original Manev potential we find similar conditions for closed orbits that are correlated with restrict values of angular momenta. We analyse also a harmonic corrected Newtonian potential