This study reports important findings about the nature of feedback to primary visual cortex (V1) during object recognition. The state-of-the-art functional MRI evidence for the main claims is solid, ...

A decrease in processing speed is associated with several antecedents, including old age, a decline in fine motor function, and the deterioration of brain connectivity. Patient processing speed is a ...

A windowed sinc function can implement a low-pass filter, and a two-dimensional convolutional filter can blur or sharpen images. In part 3 of this series, we introduced a low-pass filter based on the ...

In our day-to-day lives, we're constantly making a slew of decisions, from immediate matters to prospects on the far horizon. But the evolutionary nuts-and-bolts of how our brains weigh these numerous ...

The National Security Agency sent out an operational security special bulletin to its employees in February 2025 warning them of vulnerabilities in using the encrypted messaging application Signal, ...

Purdue University’s online Graduate Certificate in Digital Signal Processing (DSP) provides specialized knowledge and practical skills in signal theory, programming, and algorithm development, ...

Signal, as an encrypted messaging app and protocol, remains relatively secure. But Signal’s growing popularity as a tool to circumvent surveillance has led agents affiliated with Russia to try to ...

For more than a decade now, Russian cyberwarfare has used Ukraine as a test lab for its latest hacking techniques, methods that often target Ukrainians first before they're deployed more broadly. Now ...

Multiple Russia-aligned threat groups are actively targeting the Signal Messenger application of individuals likely to exchange sensitive military and government communications related to the ...