Laser-guided lightning.

Lightning discharges between charged clouds and the Earth's surface are responsible for considerable damages and casualties. It is therefore important to develop better protection methods in addition to the traditional Franklin rod. Here we present the first demonstration that laser-induced filaments-formed in the sky by short and intense laser pulses-can guide lightning discharges over considerable distances.

Rising From the Floor in Persons With Parkinson's Disease.

Although considerable research has targeted fall prevention among older adults with Parkinson's disease (PD), less is known about their ability to rise from the floor. The aim of the current exploratory study was to examine the relationship between floor rise and physical performance tests. A cross-sectional design was used.

Test of a customized compliant ankle rehabilitation device in unpowered mode.

Presented is the design, implementation, and initial gait testing of a lightweight, compliant robotic device for ankle rehabilitation. Many patients with neuromuscular disorders suffer deficits in sensorimotor control of the ankle joint, leading to an abnormal walking pattern. Robotic devices have been used to assist ankle rehabilitation.