When you have a hankering for Mexican food but don't feel like putting in all the effort to make it yourself, these nine ...

Abstract: Sparse arrays designed based on fourth-order difference co-array (DCA) can achieve significantly higher uniform degrees-of-freedom (uDOFs). However, most existing fourth-order sparse arrays ...

Spot the difference puzzles are a fun and easy way to test your observation skills while offering a brain workout during your leisure time. When you look at these puzzles first, the two pictures look ...

Spot the difference puzzles are quickly becoming an internet favorite activity and it is quite easy to see why. They offer entertainment and a brain workout that is quick, making it perfect for both ...