We describe a model of visual processing in which feedback connections from a higher- to a lower-order visual cortical area carry predictions of lower-level neural activities, whereas the feedforward ...

Feb. 6, 2026 Inspired by the shape-shifting skin of octopuses, Penn State researchers developed a smart hydrogel that can change appearance, texture, and shape on command. The material is programmed ...

PayPal offers an easy-to-use option for accepting credit card payments with transparent pricing. This guide breaks down how PayPal credit card processing works and what you can expect when adopting it ...