Unusual signals called quasi periodic eruptions appear to come from black holes, but we don't know what creates them. Now ...

We represent discrete time periodic functions in a Hilbert space spanned by the orthogonal harmonically related complex exponential functions. The discrete nature of the signal enables us to replace ...

Thus, they span an infinite‐dimensional function space, called Hilbert space, where each periodic function is uniquely represented by a set of coordinates, called the spectral coefficients, provided ...

Defense Secretary Pete Hegseth is facing growing scrutiny over his use of the commercial messaging app Signal to discuss U.S. military operations, including operational details about strikes in Yemen.

where one can operate as a receiver while the other re-transmits the received signal. Each is connected to a log-periodic antenna to greatly increase the range of the repeater along the direction ...

It's possible that the White House may be looking to replace Defense Secretary Pete Hegseth after critics warned that a pair of controversial Signal chats risked compromising US national security.

Examination of (a)periodic brain activity has gained particular interest in the last few years in the neuroscience fields relating to cognition, disorders, and brain states. Using large EEG/MEG ...

Defense Secretary Pete Hegseth shared details about impending U.S. airstrikes in Yemen with a private Signal group that included his wife, brother and personal attorney, according to sources ...

Pete Hegseth is under fire for a series of scandals including the departures of several of his top officials at the Pentagon and new reporting about his use of Signal to discuss sensitive information.

SignalGate, as it's come to be called, may be the biggest scandal to hit the Trump administration in its first months in power.But it's been great for Signal. Since the news broke on Monday that ...

"Without this wealth of data, it would have been impossible to detect the periodic signal with the level of accuracy we achieved." Unlike the aurorae of Earth, Jupiter, or Saturn, Uranus' aurorae ...