One way to harness solar energy is by using solar electricity to split water molecules into oxygen and hydrogen. The hydrogen produced by the process is stored as fuel, in a form that can be transferred from one place to another and used to generate power upon demand. To split water molecules into their component parts, a catalyst is necessary, but the catalytic materials currently used in the process, also known as the oxygen evolution reaction, are not efficient enough to make the process practical.

Optimization is a key tool in machine learning, where the goal is to achieve the best possible objective function value in a minimum amount of time. Obtaining any form of global guarantees can usually be done with convex objective functions, or with special cases such as risk minimization with one-hidden over-parameterized layer neural networks (see the June post). In this post, I will consider low-dimensional problems (imagine 10 or 20), with no constraint on running time (thus get ready for some running-times that are exponential in dimension!).

Charles Darwin was very likely the first person to have understood nature in terms of a game played across deep time. I have wondered how much further the Chess-playing naturalist might have taken this metaphor if, like Kawabata, he had studied Go. Unlike Chess, where the objective is to expose and capture the King by eliminating pieces, in Go the objective is to capture territory by surrounding enemy pieces, called stones, and by protecting unclaimed area.

"Climate change and its enormous human migrations will transform agriculture and remake the world order - and no country stands to gain more than Russia."

The researchers investigated food consumption of the Huaca Prieta and Paredones peoples, two neighboring groups who lived less than half a mile apart. Participating were Tiffiny Tung, associate professor of anthropology, Larisa DeSantis, associate professor of biological sciences and earth and environmental sciences and Tom Dillehay, senior research professor and University Distinguished Professor of anthropology and religion and culture emeritus and Rebeca Webb Wilson University Chair Emeritus.

The virus flourishes by undermining the body's chemical defense system

.... elites are arguing from their class and demographic biases (a bias can be positive, to be clear), not from their expertise. That lowers the marginal value of expertise, at least given how our world operates. I recall earlier research blogged by Alex showing that if you are a French economist, your views are more influenced by being a French person than by being an economist.

The Shirky Principle declares that complex solutions (like a company, or an industry) can become so dedicated to the problem they are the solution to, that often they inadvertently perpetuate the problem.

In the few studies and examinations which exist, in using Treasury securities it's been figured these collateral re-pledging and rehypothecation chains average multiples of six to eight; meaning, that a single UST security might be reused for book and customer business six to eight times. Between 85% and 90% of all Treasuries taken on dealer books are re-used in some fashion. No wonder these banks might become skittish, and why Treasury (and similar collateral) prices remain the way they are. The value in UST's isn't as an investment; it's the liquidity premium demanded by a fragile global monetary system. These are balance sheet tools whose worth is derived from what central bankers and bank regulators (same thing) are in no rush to comprehend.

Researchers from The Institute for Integrative Systems Biology have discovered a new gene family of antimicrobial peptides (small proteins) -the Blattellicins- in a German cockroach (Blattella germanica). The study, published in the journal Scientific Reports, may help to understand how these insects can live in unsanitary environments and defend themselves against the fungal and bacterial pathogens they encounter via the beneficial symbiotic organisms that they harbor.