Falling Boulders, Falling Trees and Icy Highways: The Policy/Operational Test Revisited

The weight of a falling chain, revisited

A vertically hanging chain is released from rest and falls due to gravity on a scale pan. We discuss the various experimental and theoretical aspects of this classic problem. Careful time-resolved force measurements allow us to determine the differences between the idealized problem and its implementation in the laboratory. We observe that, in spite of the upward force exerted by the pan on the...

Falling short of Pap test guidelines.

OBJECTIVES This article examines the associations between women's characteristics and getting or not getting a Pap test. DATA SOURCE The data are from the 1994/95 National Population Health Survey (NPHS) conducted by Statistics Canada. ANALYTICAL TECHNIQUES Multivariate logistic regressions were used to determine the odds of women not complying with Pap test guidelines, that is, of never ha...

Preventing death and serious injury from falling trees and branches

Of 128 outdoor education related deaths examined since 1960, 14 have been due to falling trees or branches. This article examines the grounds on which death or serious injury due to falling trees or branches can be regarded as an inherent risk in outdoor education, and the extent to which such incidents can be regarded as preventible. It compares alternative approaches to prevention, and draws ...

Falling apart

Destabilized nanobodies can be used to deliver fluorescent proteins and enzymes to specific targets inside cells.

Falling Between the Cracks