Humans adapt the instructions provided in route directions to the assumed spatial knowledge of the receivers; the majority of route directions is provided to wayfinders with at least partial spatial knowledge of the environment. However, today’s navigation systems assume no a-priori knowledge. Most of current research addresses this by exploring means to personalize assistance through the captu...

U-turn maneuver is a special taxiing behavior on the ground. This paper studied the behavior and aimed to research the problem of position and attitude during the movement. From the perspective of airport tower control simulation, the calculation methods that the aircraft did U-turn maneuver under the nonholonomic constraints were proposed. According to the real geometrical constraints and kine...

New Scientific Support for astrology comes from a surprising source. In 1985, Nature, one of the world's most prestigious scientific journals, published “A Double Blind Test of Astrology”, now known as the ‘Carlson experiment’. The conclusion was that natal astrology as practised by reputable astrologers was no better than chance. For astrology, it was a landmark experiment that continues to un...

Two crystal structures of the hammerhead ribozyme provide the first atomic-resolution views of an RNA active site, and suggest that the catalytic center may reside in a U-turn motif which was first seen in tRNA(Phe).

Signalized intersections on high-volume arterials are often congested during peak hours, causing a decrease in through movement efficiency on the arterial. Much of the vehicle delay incurred at conventional intersections is caused by high left-turn demand. Unconventional intersection designs attempt to reduce intersection delay and travel time by rerouting left-turns away from the main intersec...