Influência da época de semadura na duração dos estádios reprodutivos de cultivares de soja.

O objetivo deste trabalho foi avaliar a influencia de quatro épocas de semeadura sobre os estádios reprodutivos de 14 cultivares e quatro linhagens de soja, na safra 2010/2011. O trabalho foi realizado na área experimental Fazenda Retiro, da Embrapa Arroz e Feijão, em Goiânia, GO. Os ensaios foram instalados sob delineamento experimental em blocos casualizados, com três repetições. Foram coletadas as durações, em dias, dos estádios R1 a R8, da escala de Fehr e Caviness (1977). Observou-se tendência de redução do ciclo total, do período vegetativo (Vê até R1), do florescimento (de R1 até R2) e R6, grãos cheios, com o afastamento da semeadura em relação à época recomendada (novembro)

Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics

A detailed study is presented of the expected performance of the ATLAS detector. The reconstruction of tracks, leptons, photons, missing energy and jets is investigated, together with the performance of b-tagging and the trigger. The physics potential for a variety of interesting physics processes, within the Standard Model and beyond, is examined. The study comprises a series of notes based on simulations of the detector and physics processes, with particular emphasis given to the data expected from the first years of operation of the LHC at CERN

A social and ecological assessment of tropical land uses at multiple scales: the Sustainable amazon network

Science has a critical role to play in guiding more sustainable development trajectories. Here, we present the Sustainable Amazon Network (Rede Amazônia Sustentável, RAS): a multidisciplinary research initiative involving more than 30 partner organizations working to assess both social and ecological dimensions of land-use sustainability in eastern Brazilian Amazonia. The research approach adopted by RAS offers three advantages for addressing land-use sustainability problems: (i) the collection of synchronized and co-located ecological and socioeconomic data across broad gradients of past and present human use; (ii) a nested sampling design to aid comparison of ecological and socioeconomic conditions associated with different land uses across local, landscape and regional scales; and (iii) a strong engagement with a wide variety of actors and non-research institutions. Here, we elaborate on these key features, and identify the ways in which RAS can help in highlighting those problems in most urgent need of attention, and in guiding improvements in land-use sustainability in Amazonia and elsewhere in the tropics. We also discuss some of the practical lessons, limitations and realities faced during the development of the RAS initiative so far