In this paper we analyze the behavior of tornado time-series in the U.S. from the perspective of dynamical systems. A tornado is a violently rotating column of air extending from a cumulonimbus cloud down to the ground. Such phenomena reveal features that are well described by power law functions and unveil characteristics found in systems with long range memory effects. Tornado time series are...

The El Niño-Southern Oscillation (ENSO) is characterized by changes in sea surface temperature (SST) and atmospheric convection in the tropical Pacific, and modulates global weather and climate1–4. The phase of ENSO influences United States (US) temperature and precipitation and has long been hypothesized to influence severe thunderstorm occurrence over the US5–11. However, limitations12 of the...

A Digital Fountain is an approach used to provide reliability in multicast networks without the use of receiver initiated packet retransmissions. Prior work to Digital Fountain has shown that use of receiver initiated retransmissions to recover lost data is unscalable in multicast networks and the impact is significant in lossy networks. Instead, like many other techniques that transmit redunda...

Since taking office, President Obama has made substantial investments in promoting the diffusion of health information technology (IT). The objective of the national health IT program is, generally, to enable health care providers to better manage patient care through secure use and sharing of health information. Through the use of technologies including electronic health records, providers can...

Tropical cyclone (TC) tornadoes represent a relatively small subset of total tornado reports, but garner specialized attention in applied research and operational forecasting because of their distinctive origin within the envelope of either a landfalling or remnant TC. As with midlatitude weather systems, the predominant vehicle for tornadogenesis in TCs appears to be the supercell, particularl...