Dry Ice Fountain

submitted by: L3ahLov3ly

In this video we made a fountain using dry ice, water, and soap.

Magnetic Warp (Hypotrochoid)

submitted by: SirZerp
This investigation describes and demonstrates a novel technique for the visualization of magnetic fields. Two ferrofluid Hele-Shaw cells have been constructed to facilitate the imaging of magnetic field lines. We deduce that magnetically induced photonic band gap arrays similar to electrostatic liquid crystal operation are responsible for the photographed images and seek to mathematically prove the images are of exact dipole nature. This is the hypotrochoid ring magnet version, and the...

Effect of the California Tobacco Control Program on Personal Health Care Expenditures

submitted by: glantz
Background Large state tobacco control programs have been shown to reduce smoking and would be expected to affect health care costs. We investigate the effect of California's large-scale tobacco control program on aggregate personal health care expenditures in the state. Methods and Findings Cointegrating regressions were used to predict (1) the difference in per capita cigarette consumption between California and 38 control states as a function of the...
Authors: James M Lightwood, Alexis Dinno, Stanton A Glantz

Shannon Memorial Lecture: Information Theory and Minimum Mean-Square Estimation

submitted by: dougramsey

Talk by Sergio Verdu about "Information Theory and Minimum Mean-Square Estimation"

standing wave intrerference

submitted by: kelemengabi

liquid and powder infrasound stimulated

Elevator Physics

submitted by: jsrott

Basic high school physics in an elevator