Month: June 2016

Isolated DNA in tubes. (credit: Patrick Alexander / flickr)

The US Supreme Court has taken up its next patent case, which may well lead to another decision sharply overturning a ruling by the nation's top patent court.

Here's how the case made it to the high court: Life Technologies Corporation, part of Thermo Fisher Scientific, manufactures a genetic testing kit in the United Kingdom. The company sells this product worldwide. Life Tech made one element of the kit, called a Taq polymerase, in the United States and then shipped it to the UK to combine with the larger product.

In 2010, Promega sued Life Technologies for patent infringement and won a jury verdict awarding $52 million. Promega is a California biotech company that says its patent covers Life Technologies’ genetic testing kit. The judge overturned the decision after trial, however, finding merely shipping the polymerase from the US wasn't enough to warrant such a result. Promega took its case to the Federal Circuit, which hears all US patent appeals. A split Federal Circuit panel sided with Promega, reinstating the $52 million verdict. Today, the Supreme Court said they will review the case at the request (PDF) of Life Technologies.

(credit: Jayson Trevino)

The federal government is taking another step it says would make the US homeland safer from terrorism. US border authorities are proposing that millions of tourists entering the country each year reveal their social media identities.

The proposal from US Customs and Border Protection, announced last week in the Federal Register, would add a line to the online or paper form that US-bound visitors must fill out if they don't have a visa and plan on staying for up to 90 days for vacation, business, or other affairs. The agency says travelers coming to the US under the Visa Waiver Program won't be forced to disclose their social media handles, but leaving it blank obviously could raise red flags.

Here's what will be asked: "Please enter information associated with your online presence—Provider/Platform—Social media identifier." This field doesn't call for additional information such as passwords, but it's likely to yield many if applicants aren't paying attention and overshare.

(credit: Hawaii Invasive Species Council)

Chameleons have the seemingly impossible ability to capture their prey while remaining motionless simply through the flick of their tongue. This sensationalized predatory ability depends in part on a sophisticated ballistic projection of the chameleon’s tongue. The chameleon is able to extend its tongue as far as two body lengths away during a predatory attack, sending it towards its victim using accelerations that range from 300 to 1500 m/s².

Given the forces involved, what happens next is a bit surprising: the victim sticks to the tongue, even in cases where the prey is up to 30 percent of the chameleon's own body weight. Recently, a team of scientists investigated how this works.

It all depends on extremely viscous spit. The team characterized the viscosity of the mucus that's present on the chameleon's tongue by rolling small steel beads over a thin mucus film. During the rolling, the viscous forces of the mucus produce a drag force on the beads, which can be used to indirectly measure the viscosity. The scientists determined that the mucus viscosity (0.4 ± 0.1 Pa-s) is roughly 400 times larger than that of human saliva (~10^-3 Pa-s).

Version 1.0 of .NET Core, the open source, cross-platform .NET runtime platform that was first announced in 2014, has been released today. .NET Core is arriving alongside ASP.NET Core 1.0, the open source, cross-platform version of Microsoft's Web development stack.

Microsoft picked an unusual venue to announce the release: the Red Hat Summit. One of the purposes of .NET Core was to make Linux and OS X into first-class supported platforms, with .NET developers able to reach Windows, OS X, Linux, and (with Xamarin) iOS and Android, too. At the summit today, Red Hat announced that this release would be actively supported by the company on Red Hat Enterprise Linux.

After many years of non-cooperation between Microsoft and the largest of the open source commercial Linux companies, Microsoft and Red Hat announced a new partnership in November 2015. This union heralded official support for Red Hat virtual machines in Azure and closer cooperation on .NET. Full support for .NET Core 1.0 marks the next step in that partnership.