Predicted Torque Model in Low-Frequency-Assisted Boring (LFAB) Operations

Detection of spin torque magnetization dynamics through low frequency noise

Low Frequency Noise: A Major Risk Factor in Military Operations

Background. Noise is a major factor in many military environments. Usually the concern is with the higher frequency bands (> 500 Hz) that cause hearing damage or interfere with speech. Protection against noise is thus focused on these higher frequencies, while the bands of lower frequencies (< 500 Hz) are neglected, and non-audible bands, infrasound (< 20Hz) are ignored. In reality, long-term e...

Low-Frequency Model for Radio-Frequency Absorbers

A simple model is developed to characterize the behavior of radio-frequency absorbers at low frequency. The absorber is represented by a flat, homogeneous, isotropic slab of lossy material, with effective constitutive parameters. These parameters are determined by a fit to measured data. Excellent fits are obtained in the two applications considered. The model is intended for use in the charact...

Wrist extensor torque production and discomfort associated with low-frequency and burst-modulated kilohertz-frequency currents.

BACKGROUND AND PURPOSE A randomized controlled trial to compare 2 forms of monophasic pulsed currents with 2 forms of burst-modulated, kilohertz-frequency alternating current ("Russian current" and "Aussie current") was conducted to establish whether different amounts of wrist extensor torque were produced and whether discomfort varied with stimulus type. SUBJECTS The 32 subjects were adults ...

A Model of Human Teamwork for Agent-Assisted Search Operations

Coalition forces are engaged in distributed collaborative decision making in time-pressured, high-stakes situations. Providing automated decision support for such environments is a very challenging problem, due to shortening decision cycles, the changing nature of threats, opponent tactics, and environmental unpredictability. Intelligent agents have the promise to provide timely assistance in v...