Abstract: This paper investigates the attitude tracking control problem for spacecraft. A tanh-type self-learning control (TSLC) approach with variable learning intensity (VLI) is proposed, which ...

Texas sheriff's deputies credit a quick-thinking father and phone-tracking technology with saving a teenager from a violent kidnapping on Christmas. On the afternoon of Dec. 25, a 15-year-old girl ...

NORAD (North American Aerospace Defense Command) had the first ever Santa tracker in 1955. While it used to be just a boring animation of Santa’s sleigh and reindeer flying across a map, NORAD has ...

Melodee Buzzard's mother was arrested Tuesday and accused in the death of her 9-year-old daughter after the girl's body was found in a rural area of Utah more than two months after she disappeared in ...

After rounds of flooding in Washington state, another atmospheric river will likely bring more rain to the West Coast during Christmas week. Many places across the country, however, are set to ...

I work with a lot of clients over 65 who are brand new to exercise. While I often start my beginners with moves like push-ups and overhead presses, seniors sometimes find these moves too challenging.