THUNDERSTORM TOP KNOTS

A severe thunderstorm climatology for Australia and associated thunderstorm environments

Automated extraction and classification of thunderstorm and non-thunderstorm wind data for extreme-value analysis

Design wind loads are partly based on extreme value analyses of historical wind data, and limitations on the quantity and spatial resolution of wind data pose a significant challenge in such analyses. A promising source of recent wind speed and direction data is the automated surface observing system (ASOS), a network of about 1000 standardized US weather stations. To facilitate the use of ASOS...

Lissajous Knots and Knots with Lissajous Projections

Knots in R which may be parameterized by a single cosine function in each coordinate are called Lissajous knots. We show that twist knots are Lissajous knots if and only if their Arf invariants are zero. We further prove that all 2-bridge knots and all (3, q)-torus knots have Lissajous projections.

On iterated torus knots and transversal knots

A knot type is exchange reducible if an arbitrary closed n{braid representative K of K can be changed to a closed braid of minimum braid index nmin(K) by a nite sequence of braid isotopies, exchange moves and {destabilizations. (See Figure 1). In the manuscript [6] a transversal knot in the standard contact structure for S3 is de ned to be transversally simple if it is characterized up to trans...

Upward Electrical Discharges from Thunderstorm Tops

AFFILIATIONS: LYONS AND NELSON—FMA Research, Inc., Fort Collins, Colorado; ARMSTRONG—Mission Research Corporation, Nashua, New Hampshire; PASKO—The Pennsylvania State University, University Park, Pennsylvania; STANLEY—Los Alamos National Laboratory, Los Alamos, New Mexico CORRESPONDING AUTHOR: Walter A. Lyons, CCM, FMA Research, Inc., Yucca Ridge Field Station, 46050 Weld County Road 13, Fort C...