Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Start by trimming the tree with your Christmas lighting of choice (you can never go wrong with warm lights, in my opinion), ...

It may take you short of a day to find the perfect Christmas tree for your family, but for those that grow them, it takes ...

So if you’re ready to experience Christmas in a more traditional way, why not try a real Christmas tree this year? The holiday season is upon us, and with it comes the cherished tradition of setting ...

The winter storm season is just around the corner, which comes with plenty of concerns for Southern California residents in the wake of several devastating wildfires that left behind large burn scars.

Abstract: In Dempster-Shafer evidence theory, basic probability assignment (BPA) plays a important role in representing uncertain and unknown information. How to generate highquality BPA is essential, ...

Abstract: The existence of periodic windows in the parameter space is a common feature of nonlinear systems capable to produce chaotic behavior. Detection of positions of periodic windows is important ...

SUMMARY One Tree Hill first aired in 2003 and became a cult favorite. Many of the actors have settled down and started families. Almost all the main actors — including Chad Michael Murray, James ...