this research set out to evaluate the effect of combined biological and chemical nitrogen fertilizers on some corn hybrids. to this end an experiment was conducted as split plot on the basis of randomized complete block design with four replications. main plots were included: use of chemical and biological fertilizers in four levels: 100% chemical fertilizer, 75% chemical fertilizer + 100% bio-...

Many tasks in cryptography (e.g., digital signature verification) call for verification of a basic operation like modular exponentiation in some group: given (g, x, y) check that g = y. This is typically done by re-computing g and checking we get y. We would like to do it differently, and faster. The approach we use is batching. Focusing first on the basic modular exponentiation operation, we p...

The partition of unity is an essential ingredient for meshless methods named by GFEM, PUFEM (partition of unity FEM), XFEM(extended FEM), RKPM(reproducing kernel particle method), RPPM(reproducing polynomial particle method), the method of clouds in the literature. There are two popular choices for partition of unity: a piecewise linear FEM mesh and the Shepard-type partition of unity. However,...

Durante a pandemia de Covid-19, uma enfermidade mais antiga, do garimpo ilegal na Terra Indígena Yanomami, assumiu contornos epidêmicos e conflagrou o conflito entre indígenas garimpeiros que persiste há pelo menos quatro décadas região. Até dia 08 setembro 2020 já eram 8 óbitos 704 casos confirmados no interior da terra indígena. Assim, presente trabalho busca entender como mineração legal são...