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DOI: 10.1590/S1679-45082016ED3725 Last March, many experts were brought together in Geneva in a meeting organized by the World Health Organization (WHO) to discuss the dramatically increase of Zika virus infection in the Americas.(1) Among attendees there were virologists, immunologists, neurologists and epidemiologists – all of them concerned on how to stop the rapid progress of Zika virus in ...
We present nebular-phase observations and spectral models of Type Ic superluminous supernovae. LSQ14an and SN 2015bn both display late-time spectra similar to SN 2007bi, and the class shows strong similarity with broad-lined Type Ic SNe such as SN 1998bw. Near-infrared observations of SN 2015bn at +315d show a strong Ca II triplet, O I 9263, O I 1.13 μm and Mg I 1.50 μm, but no strong He, Si or...
Most bus transit systems only offer direct service between a small fraction of the origin/destination pairs that they serve. As a consequence, many travelers must transfer between bus lines to complete their journey. In this paper schedule control policies are created to minimize transfer time under stochastic conditions. We determine how long a bus should be held at a transfer stop in anticipa...
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