Abstract: Intelligent reflecting surface (IRS) is an enabling technology to engineer the radio signal propagation in wireless networks. By smartly tuning the signal reflection via a large number of ...

Every year during a small period of time a ray of mystical light appears in the Keyhole Arch at the Pfeiffer Beach, California. This natural phenomenon draws lots of visitors, as well as professional ...

A weekend outing at one of Sedona's most photographed caves turned tragic Saturday afternoon when a climber in his 50s fell while rappelling into Keyhole Cave above the Sugarloaf Trailhead and later ...