PHOENIX — APS is evaluating the future of its Cholla Power Plant now that President Donald Trump has signed multiple executive orders aimed at boosting the coal industry. Electricity generation ...

Acoustic guitars aren’t very metal. That is, until you hear the intro of Metallica’s Fade to Black, or till Black Sabbath’s Planet Caravan sparks a compulsion to turn the overdrive down and jam the ...

Use our acoustic guitar chord charts - from basic open chords to the daddy ... The A7, D7 and E9 shapes shown here are all you need for a 12-bar blues improv in the key of A. A13 and E7#9 have an ...

State Key Laboratory for Strength and Vibration of Structures, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China ...