Are High-Frequency Wands the Next Big At-Home Device?

A cornerstone of the most effective facials, high-frequency technology quells acne, inflammation, and redness in a quick, painless treatment.

Vibrational spectroscopy technique enables nanoscale mapping of molecular orientation at surfaces

Sum-frequency generation (SFG) is a powerful vibrational spectroscopy that can selectively probe molecular structures at ...

Mercury's BepiColombo Mio and Earth's GEOTAIL show shared wave frequency properties across planetary magnetospheres

Tohoku University (Japan), LPP (France), and partners has demonstrated that chorus emissions, natural electromagnetic waves ...
Medscape

Physical Activity May Slow Kidney Function Decline

Exercising more frequently is associated with a significantly slower decline in measured glomerular filtration rate in a new ...
IEEE

Kernel-Based Estimation of Frequency Response Function of Strictly Passive Systems

Abstract: Estimating the Frequency Response Function (FRF) of Linear Time-Invariant (LTI) systems is critical for many applications. Conventional methods often neglect physical constraints such as ...
The New York Times

States and Cities Fear a Disaster Season Full of Unknowns Amid Federal Cuts

President Trump’s efforts to downsize the government threaten essential functions that Americans have come to rely on before, during and after natural disasters. By Patricia Mazzei Judson Jones ...
Microwaves & RF

What Should Proper High-Speed Converter Passband Flatness Look Like? (Part 1)

How to measure and characterize the analog bandwidth for a receiver’s ADC. The ins and outs of the fundamental frequency-response measurement method. How to assemble the proper test setup. With analog ...