Symbols and markings carved into tools and figurines by Stone Age humans over 40,000 years ago could be an ancient precursor to writing, according to a new analysis. The marks, found on 260 artifacts ...

Add Yahoo as a preferred source to see more of our stories on Google. Police scanner audio provides more details in Urbandale police’s response to investigate a dead body on Sunday night.

Abstract: In this paper, a wideband, wide-scan tightly coupled dipole array (TCDA) is designed. The dipole elements and integrated strip line balun are printed on a vertical printed circuit board (PCB ...

Abstract: Active electronically scanned arrays and reconfigurable intelligent surfaces are becoming ubiquitous in radar and telecommunication applications. A major issue in these devices is to achieve ...