Today I would like to present the turbine-powered optical isolator, a steampunk-sounding bit of hardware that only allows light to pass in one direction. That, I must admit, is a sentence I never ...

An increasing number of rheumatologists have access to ultrasound equipment that provide both color and power Doppler modes, which can be used to investigate musculoskeletal and vascular pathologies.

Representative transvaginal US images of nonclassic lesions; color Doppler blood flow with color bar signifies direction of flow. (A) Transverse color Doppler image of right adnexa depicts a ...

When it comes to finding what direction a radio signal is coming from, the best and cheapest way to accomplish the task is usually a Yagi and getting dizzy. There are other methods, and at Shmoocon ...

We have all heard the change in pitch when an ambulance or police car drives by with its siren blaring. The pitch is higher as the vehicle comes toward you, and shifts to a lower pitch as it goes away ...