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Avoiding a fall requires fast and appropriate step responses, stepping speed as a fall risk indicator has only been assessed in older adults. We have developed a new measurement system that applies a laser range finder to assess temporal and spatial parameters of stepping performance such as step speed, length, and accuracy. This measurement system has(More)
A compact V-band GaAs MMIC chip set consisting of (1) a single highly integrated receiver MMIC with 6.5 dB NF and 2 dB conversion gain using a subharmonically pumped mixer and (2) a transmitter MMIC having a state-of-the-art 30-60 GHz doubler with 14.3 dB maximum conversion gain, 17.7 dBm output power and broadband RF characteristics has been successfully(More)
BACKGROUND AND AIMS Avoiding falls requires fast and appropriate step responses in real-life situations. We developed a step-tracking device that uses an infrared laser sensor for convenient assessment of stepping performance, including concurrent assessment of temporal and spatial parameters. In the present study, we created a new index for assessment of(More)