30 Words And Phrases To Learn Before Any Vacation

Traveling to another country when you don't know the language can be tricky. Here are some important phrases to look up ...

Learning a second language can protect your brain. Here’s how.

A new study suggests that everyday multilingual habits—from chatting with neighbors to revisiting a childhood language—may ...

In 1995, a Netscape employee wrote a hack in 10 days that now runs the Internet

“Bill Gates was bitching about us changing JS all the time,” Eich later recalled of the fall of 1996. Microsoft created its ...
IEEE

A Hybrid Sign Detection-Adaptive Learning Control Scheme for Nonlinear Systems with Unknown Time-Varying Control Directions

Abstract: The control direction of a plant may switch during operation, which will lead to positive feedback and quickly cause system instability. To address the trajectory tracking problem under ...