Fall speed measurement and high-resolution multi-angle photography of hydrometeors in free fall

The rise and fall of third-party high-speed access

While Internet usage blossomed during the entire 1995 – 2001 time period, there was a large change in the nature of the high-speed Internet access business. Initially, connection, routing and content were three separate parts of high-speed Internet service. Cable companies initially teamed with affiliated third-party providers to create their highspeed access combination of connection and routi...

In situ granular charge measurement by free-fall videography.

We present the design and performance characterization of a new experimental technique for measuring individual particle charges in large ensembles of macroscopic grains. The measurement principle is qualitatively similar to that used in determining the elementary charge by Millikan in that it follows individual particle trajectories. However, by taking advantage of new technology we are able t...

Free fall and cellular automata

Three reasonable hypotheses—homogeneity in time and space, bounded velocity of propagation of information, and bounded density of information—lead to the thesis that physical phenomena can be described and simulated with cellular automata. This implication has in fact been formalized into a theorem both in the classical [6] and the quantum case [1], albeit in flat space. Further evaluating this...

High-Resolution Time-frequency Distributions for Fall Detection

In this paper, we examine the role of high-resolution time-frequency distributions (TFDs) of radar micro-Doppler signatures for fall detection. The work supports the recent and rising interest in using emerging radar technology for elderly care and assisted living. Spectrograms have been the de facto joint-variable signal representation, depicting the signal power in both time and frequency. Al...

Medicare's reputation in free fall before budget.