Lifeboat Foundation

When optical beams, consisting of photons, travel through fibers, they cause vibrations that generate acoustic waves, consisting of phonons. The phenomenon, called Brillouin scattering, has been harnessed by researchers to optomechanically “couple” acoustic waves with light waves. This coupling allows information carried by photons to be transduced, or converted, to the phonons, which travel nearly a million times more slowly than light waves.

Opto-acoustic coupling has enabled researchers to read and manipulate the transduced information more easily. To date, however, many of the Brillouin scattering techniques researchers have used rely on standard fiber geometries that cause acoustic waves to die out quickly, limiting the efficacy of the coupling.

Now, using an optical fiber with a micron-sized waist, University of Rochester researchers have demonstrated how to couple propagating optical waves and long-lived acoustic waves, with strong optical-acoustic interactions.

Gas clouds in the Cygnus X Region, a region where stars form, are composed of a dense core of molecular hydrogen (H₂) and an atomic shell. These ensembles of clouds interact with each other dynamically in order to quickly form new stars. That is the result of observations conducted by an international team led by scientists at the University of Cologne’s Institute of Astrophysics and at the University of Maryland.

Until now, it was unclear how this process precisely unfolds. The Cygnus X region is a vast luminous cloud of gas and dust approximately 5,000 light years from Earth. Using observations of spectral lines of ionized carbon (CII), the scientists showed that the clouds have formed there over several million years, which is a fast process by astronomical standards. The results of the study, “Ionized carbon as a tracer for the assembly of interstellar clouds,” will appear in the next issue of Nature Astronomy.

The observations were carried out in an international project led by Dr. Nicola Schneider at the University of Cologne and Prof Alexander Tielens at the University of Maryland as part of the FEEDBACK program on board the flying observatory SOFIA (Stratospheric Observatory for Infrared Astronomy). The new findings modify previous perceptions that this specific process of star formation is quasi-static and quite slow. The dynamic formation process now observed would also explain the formation of particularly massive stars.

WASHINGTON, Feb 17 (Reuters) — U.S. diplomatic communications with China remain open after the shooting down of a Chinese spy balloon this month, but contact between the countries’ militaries “unfortunately” remains shut down, the White House said on Friday.

White House National Security Council spokesman John Kirby also said it was not the “right time” for Secretary of State Antony Blinken to travel to China after he postponed a Feb. 5–6 trip over the balloon episode, but President Joe Biden wanted to speak to Chinese President Xi Jinping when it was “appropriate.”

Kirby told a White House news briefing that U.S. and Chinese diplomats can still communicate despite tensions over the balloon incident.

https://youtube.com/watch?v=hNlgfvtS5qw

Welcome to the first issue of Rushing Robotics with brief overviews of each section.

In a stunning development, a neural network now has the intuitive skills of a 9-year-old.

The project that resulted has helped slash the district’s annual energy consumption by 1.6 million kilowatts and in three years generated enough savings to transform the district’s $250,000 budget deficit into a $1.8 million surplus.

Just as Hester envisioned at the outset, a major chunk of the money is going toward teachers’ salaries — fueling pay raises that average between $2,000 and $3,000 per educator per month.

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This process is no less relevant to humans than any other species in nature, but since our species is such an evolutionary newcomer, the extent of its influence — and how it might work today — is still difficult to pin down.

The challenge: A team of researchers in Greece and Ireland, led by Nikolaos Vakirlis at the Alexander Fleming Biomedical Sciences Research Center in Athens, argues that a key to understanding human evolution lies with short sequences of DNA named “open reading frames” (ORFs). These structures are small sections of the genome that encode tiny protein molecules — microproteins — which can perform a diverse range of crucial biological tasks, from regulating muscle performance to alerting cells to damaging stresses.

Due to their minuscule sizes, ORFs are notoriously difficult to study. Because of this, their full relevance has gone under the radar in mainstream genomics research until recently, and even today, they still aren’t considered to be proper genes in themselves. For Vakirlis’ team, this potential oversight masks the fact that the microproteins encoded by ORFs can develop their own de novo sequences over generations, which may eventually develop into new genes.

Also weighing in with an online essay was the Rev. Russell Moore, formerly head of the Southern Baptist Convention’s public policy division and now editor-in-chief of the evangelical magazine Christianity Today. He confided to his readers that his first sermon, delivered at age 12, was a well-intentioned mess.

“Preaching needs someone who knows the text and can convey that to the people — but it’s not just about transmitting information,” Moore wrote. “When we listen to the Word preached, we are hearing not just a word about God but a word from God.”

“Such life-altering news needs to be delivered by a human, in person,” he added. “A chatbot can research. A chatbot can write. Perhaps a chatbot can even orate. But a chatbot can’t preach.”

“OpenAI was created as an open source (which is why I named it ‘Open’ AI), non-profit company to serve as a counterweight to Google, but now it has become a closed source, maximum-profit company effectively controlled by Microsoft,” Musk tweeted (Opens in a new window) today. “Not what I intended at all.”

OpenAI this week acknowledged that its process for “fine-tuning” ChatGPT is “imperfect.”

“Sometimes the fine-tuning process falls short of our intent (producing a safe and useful tool) and the user’s intent (getting a helpful output in response to a given input),” OpenAI says (Opens in a new window). “Improving our methods for aligning AI systems with human values is a top priority (Opens in a new window) for our company, particularly as AI systems become more capable.”