LANDFILLING OR BIKING?

Biking Without Pedaling

It is well known that skilled bicycle riders can balance and propel themselves forward using motions of the handlebar. We present the complete nonlinear dynamics and control of such a pedal-less bicycle with a rider. Propulsion is achieved not by pedaling but by a cyclic motion of the steering axis of the bicycle. It is shown that this kind of actuation results in net forward motion of the bicy...

From Sanitary to Sustainable Landfilling

Active living and biking: tracing the evolution of a biking system in Arlington, Virginia.

In Arlington, Virginia, a steady evolutionary change in biking policy during the last three decades has yielded some of the nation's best biking assets. It has a comprehensive, well-connected, highly integrated, well-mapped, and well-signed system of shared-use paved trails, bike lanes, bike routes, and other biking assets, such as workplace showers. Understanding the conditions that led to Arl...

Comparative Outcomes of Traumatic Brain Injury from Biking Accidents With or Without Helmet Use.

OBJECTIVE To determine if health outcomes and demographics differ according to helmet status between persons with cycling-related traumatic brain injuries (TBI). METHODS This is a retrospective study of 128 patients admitted to the Montreal General Hospital following a TBI that occurred while cycling from 2007-2011. Information was collected from the Quebec trauma registry and the coroner's o...

Models are not the answer to improved landfilling.

Hillary Inyang’s article in the September 1, 2004, Environmental Science &Technology, “Modeling the Long-Term Performance of Waste Containment Systems: Better models will help predict what happens to containments in 50 or 1000 years” presents a discussion of some of the issues that need to be considered/evaluated in developing landfills for waste storage. However, her statement at the conclusio...