HELICAL FILAMENTS ARRAY GENERATED BY FEMTOSECOND VORTEX BEAMS WITH LENS ARRAY IN AIR


Plant food resources and the diet of a parrot community in a gallery forest of the southern Pantanal (Brazil)

Neotropical parrots usually forage in forest canopies for nectar, flowers, leaves, fruit pulp, and seeds.As they have no all-purpose territories, these birds usually exploit vegetation mosaics in order to use plentiful resources as they become available.In this study we examine the use of a gallery forest in the southern Pantanal (Brazil) by a dive

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Does managing a retirement portfolio via rate of return, Sharpe ratio and social interaction generate good returns? An analysis for the years 2017 to 2020

Motivated by the economic context, Dummy Launcher the social security reform in Brazil, and the behavior of Brazilian individual investors in the retirement-fund market, this study designs an algorithm to manage a real retirement-fund portfolio.In our model, the theoretical manager of the fund can allocate its resources among four securities belong

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