Lifeboat Foundation

A paper posted online this month has settled a nearly 30-year-old conjecture about the structure of the fundamental building blocks of computer circuits. This “sensitivity” conjecture has stumped many of the most prominent computer scientists over the years, yet the new proof is so simple that one researcher summed it up in a single tweet.

“This conjecture has stood as one of the most frustrating and embarrassing open problems in all of combinatorics and theoretical computer science,” wrote Scott Aaronson of the University of Texas, Austin, in a blog post. “The list of people who tried to solve it and failed is like a who’s who of discrete math and theoretical computer science,” he added in an email.

The conjecture concerns Boolean functions, rules for transforming a string of input bits (0s and 1s) into a single output bit. One such rule is to output a 1 provided any of the input bits is 1, and a 0 otherwise; another rule is to output a 0 if the string has an even number of 1s, and a 1 otherwise. Every computer circuit is some combination of Boolean functions, making them “the bricks and mortar of whatever you’re doing in computer science,” said Rocco Servedio of Columbia University.

Amazon billionaire Jeff Bezos is showing off a picture of his Blue Origin space venture’s BE-4 rocket engine going full blast during a hot-fire test in Texas.

“BE-4 continues to rack up time on the test stand,” Bezos said in an Instagram post accompanied by a picture of today’s full-power engine test.

The research and development of neural networks is flourishing thanks to recent advancements in computational power, the discovery of new algorithms, and an increase in labelled data. Before the current explosion of activity in the space, the practical applications of neural networks were limited.

Much of the recent research has allowed for broad application, the heavy computational requirements for machine learning models still restrain it from truly entering the mainstream. Now, emerging algorithms are on the cusp of pushing neural networks into more conventional applications through exponentially increased efficiency.

Sexy cyborg face paint by: Mimi Choi!

It’s an intruiging technology. All it takes to set up is burying a sensor in the plant’s dirt, and it works for living and non-living things alike. Given that the experience is going to be wildly different depending on the plant, it’s not like this would be useful for doing anything with accuracy. But for doing weird, unique things (while fondling plants) it’s perfect.

In this era of Kinect, Wii, and Leap, everyone wants to capitalize on motion control. Disney still likes physical peripherals, like houseplants for example.

A short drive south of Alice Springs, the second largest population center in Australia’s Northern Territory, there is a high-security compound, code-named “RAINFALL.” The remote base, in the heart of the country’s barren outback, is one of the most important covert surveillance sites in the eastern hemisphere.

It’s a riddle of cosmic proportions: how can the universe contain stars older than itself?

That’s the conundrum now facing astronomers trying to establish the age of the universe – and its resolution could spark a scientific revolution.

At an international conference held in California last month, there was hope a resolution might be found. Instead, the latest findings only confirmed suspicions there is something fundamentally wrong with current ideas of how the universe works.

The U.S. Army has confirmed it is trying to speed up high-powered laser weapon program to develop a new system that will acquire, track, engage, and defeat unmanned aircraft system, cruise missile and rocket, artillery, and mortar threats.

The new Army’s high-powered laser weapon system is intended to provide 360º protection and simultaneously engage threats arriving from different azimuths.

The Army will adjust the current High Energy Laser Tactical Vehicle Demonstrator (HEL-TVD), a 100 kW-class laser system integrated on a Family of Medium Tactical Vehicles platform developed by Dynetics and subcontractor Lockheed Martin. Under the new directed energy strategy, the Army is leveraging progress made in that effort in order to merge the HEL-TVD with similar technologies in development by the Navy and the Office of the Secretary of Defense.

SELF-RENEWAL Fluorescent markers reveal which genes are turned on as hydras’ stem cells develop into specific cell types. For instance, nerve cells light up magenta in one hydra (second from left). Another (second from right) shows gene activity behind two of the stages of development (early, green; late, red) of the animal’s stinging cells.