Golfland Sunsplash in Mesa has officially opened Riptide, a nearly 10-story-tall attraction billed as Arizona’s tallest ...

Arizona has a brand-new tallest waterslide that is now open for the summer. Here's what makes the thrilling attraction unique ...

Starre Vartan is an environmental and science journalist. She holds an MFA degree from Columbia University and Geology and English degrees from Syracuse University. Echeveria comes in many sizes, ...

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Abstract: Sliding mode control is widely used to enhance the speed control performance of permanent magnet synchronous motors (PMSM). However, the slow reaching onto the sliding surface and chatting ...