The use of manual (i.e., active) restraint systems (or seat belts) in cars has increased dramatically over the last several decades, changing from around 10% in the late 1970s to as much as 68% in the 1990s (Datta & Guzek, 1992; National Highway Traffic Safety Administration [NHTSA], 1996b). Several factors are responsible for this increase. One important determinant has been the passage of man...

Asteroids, mainly rocky or metallic bodies in the inner solar system, orbit the Sun in various distinct populations (planet-crossers, main-belt asteroids, trans-Neptunian Edgeworth-Kuiper belt objects, Centaurs in the outer planetary region) between which there are transfers over substantial timescales. For example the main belt is the main reservoir replenishing the Earth-crossing asteroids, t...

The main belt is believed to have originally contained an Earth mass or more of material, enough to allow the asteroids to accrete on relatively short timescales. The present-day main belt, however, only contains ∼5 × 10−4 Earth masses. Numerical simulations suggest that this mass loss can be explained by the dynamical depletion of main belt material via gravitational perturbations from planeta...

Each year thousands of children are injured by falling from shopping carts. Buckling children into the seats of shopping carts could prevent many of these injuries. A combined reversal and multiple baseline across settings design was used to evaluate the impact of verbal prompts on shopping cart safety-belt use in two stores. Safety-belt use increased following implementation of the verbal prom...

The 1,652 additional lives saved in all 38 States and the District of Columbia resulting from the increase in seat belt use would represent an increase of 11 percent above the estimate of lives saved by seat belts (15,147) for 2007. Over 50 percent of the total benefits in lives saved (842 out of the total of 1,652 lives saved), non-fatal injuries saved (22,677 out of the total of 39,486 non-fa...

A battery drives a motor that in turn drives a paddlewheel via a belt drive. The paddlewheel turns in a water bath that heats up as a consequence. Hence, energy E is transferred from the battery to the water bath, and as a result the mass of the battery decreases by E/c while the mass of the water increases by the same amount, where c is the speed of light. How does this energy get from the bat...

BACKGROUND Stroke is a costly and debilitating disease that disproportionately affects blacks. Despite the efficacy of statins, evidence suggests racial disparities may exist in statin prescribing. METHODS AND RESULTS We analyzed discharge medications for participants hospitalized for an ischemic stroke during follow-up of the REGARDS (Reasons for Geographic and Racial Differences in Stroke) ...

OBJECTIVES Stroke disparities in relation to the Stroke Belt have been studied extensively, but little is known about stroke mortality disparities outside the Stroke Belt. We examined the hypothesis that racial and rural-urban stroke disparities exist outside the Stroke Belt. DESIGN, SETTING, PARTICIPANTS A county-based population study of stroke mortality in adults, aged -25 years, for a sev...

A series of sled tests was performed using the Q3S anthropomorphic test device (ATD) and the ECE R44 sled buck to study CRS and pediatric occupant kinematics in far-side impacts. Using one model of convertible child restraint system (CRS), tests were performed using a 24 km/hr, 20 g pulse to compare ATD and CRS response to lateral loading in both forward-facing (FF) and rearward-facing (RF) con...

The kinematics of the Gould Belt is considered taking into account its orientation in space and the motions of its member stars parallel and perpendicular to the galactic plane. An analysis of Hipparcos data for these stars, complemented with published radial velocities, shows that there is a mild gradient along the galactic plane in the velocity component perpendicular to it. The maintenance o...