Abstract: The time-varying areal extent and duration of surface melt on ice sheets are important parameters for climate and cryosphere research and key indicators of climate change in polar regions.

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Abstract: Robotics has come a long way from industrial robotic arms and is all set to enter our homes. The capability of a robot to navigate in an unknown human populated environment with obstacles ...

Stephen G. Sheetz, the former president and CEO of convenience store chain Sheetz, died Sunday, the family-owned company announced. He was 77 years old. Sheetz died from respiratory complications ...

Stephen G. Sheetz, the former president, CEO and board chairman of his family’s Altoona, Pennsylvania-based c-store chain, died Sunday night. He was 77, the company said. Sheetz had a history with the ...