Adaptive Cruise Control (ACC) is assumed to have a potential to improve quality-of-service and safety and to reduce the environmental impact of the road traffic system. This paper use vehicle trajectories from traffic simulation to study impacts of ACC on vehicle acceleration and deceleration rates. The analysis is based on traffic simulations with car-following models including ACC functionali...

ACL injury continues to be the largest single problem in orthopedic sports medicine, with approximately 95,000 new injuries occurring every year. Non-contact mechanisms represent 80% of the traumatic events resulting in more than 2000 ACL injuries per years between young athletes aged 14–23 years. Acceleration, deceleration, change of direction, landing and pivoting are the most common mechanis...

Causality principle is a powerful criterion that allows us to discriminate between what is possible or not. In this paper we study the transition from decelerated to accelerated expansion in the context of Cardassian and dark energy models. We distinguish two important events during the transition. The first one is the end of the matter-dominated phase, which occurs at some time teq. The second...

In the present model, a unified picture of cosmology from early inflation to late acceleration is obtained from f(R)− gravity with nonlinear terms R and R of scalar curvature R. It is discussed that elementary particles and radiation are produced during early inflation. The emitted radiation thermalizes the universe to a very high temperature ∼ 10GeV. The exit of the universe from inflationary ...

Fundamental investigations about differential limen (DL) for word-based speech rate variations in Japanese are described. We carry out auditory tests with stimuli made by equally lengthening or shortening a duration of a word in a sentence. We set up the experiments to diffuse the subjects' focus of attention. When the focus is diffused, the DL value of acceleration increases in several cases. ...

A study was undertaken to investigate whether driver celeration (overall mean speed change) behavior can predict traffic accident involvement. Also, to test whether acceleration, deceleration or the combined celeration measure was the better predictor. Bus driver celeration behavior was measured repeatedly in real traffic, driving en route, and correlated with accidents for which the drivers we...

This paper uses the supernova data to explore the property of dark energy by some model independent methods. We first Taylor expand the scale factor a(t) and the luminosity distance dL to the fifth order to find out that the deceleration parameter q0 < 0. This result just invokes the Robertson-Walker metric. So the conclusion that the universe is expanding with acceleration is more general. The...

in this paper, the effect of bedrock inclination on seismic performance of slopes is investigated. the study was conducted based on dynamic analysis of different slopes, evaluation of the earthquake acceleration in sliding mass, and calculating the permanent displacement of the slope, using newmark sliding block. the investigation indicates that variation of the bedrock inclination may cause th...