Lifeboat Foundation

Taxonomy of principal distances and divergences v/ Frank Nielsen.

We define duo Bregman divergences, duo Fenchel-Young divergences, duo Jensen divergences. We show how those divergences occur naturally when calculating the Kullback-Leibler divergence and skew Bhattacharyya distances between densities belonging to nested exponential families. We report the KLD between truncated normal distributions as a duo Bregman divergence. Demo code:

Kurt Gödel was born #OTD 1906.

Today marks Kurt Gödel’s one hundred and eleventh birthday. Along with Aristotle, Gödel is often considered the greatest logician in history. But I believe his influence goes much farther. In an age when both science and politics seem to be riddled with an incessant search for “truth” — often truth that aligns with one’s preconceived social or political opinions — Gödel’s work is a useful antidote and a powerful reminder against the illusion of certainty.

It turns out that such cannibalism cannot explain the missing pulsar problem, according to Caizzo. “We found that in our current model PBHs are not able to disrupt these objects but this is only considering our simplified model of 2 body interactions,” he said. It doesn’t rule out the existence of PHBs, only that in specific instances, such capture isn’t happening.

So, what’s left to examine? If there are PHBs in the cores and they’re merging, no one’s seen them yet. But, the center of the Galaxy is a busy place. A lot of bodies crowd the central parsecs. You have to calculate the effects of all those objects interacting in such a small space. That “many-body dynamics” problem has to account for other interactions, as well as the dynamics and capture of PBHs.

Astronomers looking to use PBH-neutron star mergers to explain the lack of pulsar observations in the core of the Galaxy will need to better understand both the proposed observations and the larger populations of pulsars. The team suggests that future observations of old neutron stars close to Sgr A could be very useful. They’d help set stronger limits on the number of PBHs in the core. In addition, it would be useful to get an idea of the masses of these PBHs, since those on the lower end (asteroid-mass types) could interact very differently.

In Seville, 3,000-year-old underground technology is being transformed in modern day air-conditioning.

U.S. produces the most futuristic energy, the same that all countries are looking for: 900 MW with this massive natural monument.

A study that could help revolutionize wireless communication introduces a novel method to curve terahertz signals around an obstacle.

While cellular networks and Wi-Fi systems are more advanced than ever, they are also quickly reaching their bandwidth limits. Scientists know that in the near future they’ll need to transition to much higher communication frequencies than what current systems rely on, but before that can happen there are a number of — quite literal — obstacles standing in the way.

Researchers from Brown University and Rice University say they’ve advanced one step closer to getting around these solid obstacles, like walls, furniture and even people — and they do it by curving light.

A new biomarker test successfully predicted the early onset of knee osteoarthritis years ahead of noticeable signs.

The world’s first artificial energy island is being built off the coast of Belgium and will serve as future interconnector between countries as well.

In a new study, a Yale Pathology team has identified a possible therapeutic target for treating obesity-induced liver cancer.

Researchers say inhibiting a molecule called fatty acid binding protein 5 (FABP5) could block tumor progression in many cases:

Inhibiting a certain protein in mice reduced obesity-induced liver tumor development, Yale researchers found. It could reveal a future treatment route.

Continue reading “Study identifies driver of liver cancer that could be target for treatment” »