Unavoidable Conflict Between Massive Gravity Models and Massive Topological Terms

Massive gravity models in 2+1 dimensions, such as those obtained by adding to Einstein's gravity the usual Fierz-Pauli, or the more complicated Ricci scalar squared ($R^2$), terms, are tree level unitary. Interesting enough these seemingly harmless systems have their unitarity spoiled when they are augmented by a Chern-Simons term. Furthermore, if the massive topological term is added to $R + R_{\mu\nu}^2$ gravity, or to $R + R_{\mu\nu}^2 + R^2$ gravity (higher-derivative gravity), which are nonunitary at the tree level, the resulting models remain nonunitary. Therefore, unlike the common belief, as well as the claims in the literature, the coexistence between three-dimensional massive gravity models and massive topological terms is conflicting.Comment: 13 pages, no figure

Spin-orbit mode transfer via a classical analog of quantum teleportation

We translate the quantum teleportation protocol into a sequence of coherent operations involving three degrees of freedom of a classical laser beam. The protocol, which we demonstrate experimentally, transfers the polarisation state of the input beam to the transverse mode of the output beam. The role of quantum entanglement is played by a non-separable mode describing the path and transverse degrees of freedom. Our protocol illustrates the possibility of new optical applications based on this intriguing classical analogue of quantum entanglement.Comment: 5 pages, 7 figure

Medidas gerais de controle de nematóides de batata.

bitstream/CNPH-2010/36356/5/Medidas-gerais-de-controle.pd

Pre-diagnosis health-related quality of life, surgery, and survival in women with advanced epithelial ovarian cancer: A SEER-MHOS study

Health-related quality of life (HRQOL) has been found to be associated with overall survival in women with ovarian cancer. However, previous studies assessed HRQOL after surgery within clinical trial populations only. The study goal was to determine the association of pre-cancer diagnosis HRQOL with the likelihood of receiving surgery and with overall survival in a national, population-based cohort of older women with advanced ovarian cancer

Relação do índice de satisfação das necessidades de água com a produtividade da soja em diferentes sistemas de manejo e de culturas.

O objetivo do trabalho foi relacionar os efeitos dos sistemas de manejo e de culturas sobre a produtividade da soja à disponibilidade hídrica de cada safra. Foram utilizados dados de produtividade da soja obtidos em três sistemas de manejo do solo (sistema plantio direto - SPD; plantio direto escarificado a cada três anos; e sistema preparo convencional) e dois sistemas de culturas (rotação tremoço/milho-aveia/sojatrigo/ soja-trigo/soja e sucessão trigo/soja) nas safras de 1995/96 a 2008/09. O experimento foi conduzido desde 1988 sobre um Latossolo Vermelho distroférrico em Londrina/PR. A produtividade da soja foi relacionada a um indicador da condição hídrica da cultura, o índice de satisfação das necessidades de água (ISNA). Para cada safra, estimou-se o valor médio do ISNA na fase reprodutiva da soja, por meio do modelo BIPZON. O SPD diminuiu a suscetibilidade da soja a perdas de produtividade pela seca. A escarificação esporádica no SPD e a rotação de culturas não modificaram a eficiência de uso da água pela soja.(INCAPER. Documentos, 14)