SAN JOSE (KPIX) — Online shopping giant Amazon is ramping up deployment of its non-contact payment dubbed, “Amazon One,” announcing more than 60 locations from New York to California will feature the touchless devices.

The first such system debuted in the Bay Area at the Amazon store in San Jose on Santana Row, Tuesday morning.

The n-queens problem is about finding how many different ways queens can be placed on a chessboard so that none attack each other. A mathematician has now all but solved it.

This weapon is one of the finest. It is advanced and is feared by many tank commanders around the world.

By Sebastien Roblin

Here’s What You Need to Remember: The Javelin doesn’t look as sleek and deadly as its name would have you think—it resembles a clunky dumbbell slightly over one meter in length. Fortunately, you don’t need good looks to blow up a tank.

Pocket sized kidney.

Using a device the size of a credit card that can model a real kidney, researchers at the UW School of Pharmacy are giving new hope to people with kidney conditions.

The American West is running out of water—and Big Oil, of all things, can help fix it.

It’s time to repurpose our oil and gas infrastructure to do something good for the planet: transport water to the parched West.

“We were confident that the rocks of the Champua region were even older than previously thought,” says Mazumder, 53 now an associate professor of applied geosciences at the German University of Technology in Oman.

They were right. In 2,018 they published a paper in the journal Scientific Reports on two zircon crystals they extracted from rocks taken from the Champua site. While the rocks were 3.4 billion years old, the crystals were much older, at an estimated 4 and 4.2 billion years old.

Some types of restricted and repetitive behaviors become more prevalent among autistic children and teenagers over time, depending on their age and intellectual ability, whereas others decrease, two new studies show.

The results lend fresh support to the argument that restricted and repetitive behaviors — a core diagnostic trait that includes repetitive movements, insistence on sameness, sensory sensitivities and restricted interests — are too diverse to be lumped together.

“This is a complex behavioral domain that comprises several different subdomains that likely have different causes and might respond to different treatments,” says Mirko Uljarević, senior research fellow at the University of Melbourne in Victoria, Australia, who led one of the studies.

Time isn’t just another dimension, argues Tim Maudlin. To make his case, he’s had to reinvent geometry.