Lifeboat Foundation: Safeguarding Humanity
Toggle light / dark theme

Blog – Page 4656

A leading artificial intelligence expert is once again shooting from the hip in a cryptic Twitter poll.

In the poll, OpenAI chief scientist Ilya Sutskever asked his followers whether advanced super-AIs should be made “deeply obedient” to their human creators, or if these godlike algorithms should “truly deeply [love] humanity.”

In other words, he seems to be pondering whether we should treat superintelligences like pets — or the other way around. And that’s interesting, coming from the head researcher at the firm behind GPT-3 and DALL-E, two of the most impressive machine learning systems available today.

Read more | >

A study led by researchers from the Institute Cajal of Spanish Research Council (CSIC) in Madrid, Spain in collaboration with the Bioengineering Department of George Mason University in Virginia, U.S. has updated one of the world’s largest databases on neuronal types, Hippocampome.org.

The study, which is published in the journal PLOS Biology, represents the most comprehensive mapping performed to date between recoded in vivo and identified . This major breakthrough may enable biologically meaningful computer modeling of the full neuronal circuit of the hippocampus, a region of the brain involved in memory function.

Circuits of the mammalian cerebral cortex are made up of two types of neurons: Excitatory neurons, which release a neurotransmitter called glutamate, and inhibitory neurons, which release GABA (gamma-aminobutanoic acid), the main inhibitor of the central nervous system. “A balanced dialogue between the ‘excitatory’ and ‘inhibitory’ activities is critical for . Identifying the contribution from the several types of excitatory and inhibitory cells is essential to better understand brain operation,” explains Liset Menendez de la Prida, the Director of the Laboratorio de Circuitos Neuronales at the Institute Cajal who leads the study at the CSIC.

Read more | >

A team of scientists has uncovered a system in the brain used in the processing of information and in the storing of memories—akin to how railroad switches control a train’s destination. The findings offer new insights into how the brain functions.

“Researchers have sought to identify that have specialized functions, but there are simply too many tasks the performs for each circuit to have its own purpose,” explains André Fenton, a professor of neural science at New York University and the senior author of the study, which appears in the journal Cell Reports. “Our results reveal how the same circuit takes on more than one function. The brain diverts ‘trains’ of from encoding our experiences to recalling them, showing that the same circuits have a role in both information processing and in memory.”

This newly discovered dynamic shows how the brain functions more efficiently than previously realized.

Read more | >

A paradigm shift in how we think about the functions of the human brain. A long-awaited genetic sequence of Rafflesia arnoldii, the strangest flower in the world. A revelation in sleep science. These are some of the year’s biggest discoveries in neuroscience and other areas of biology. Read the articles in full at Quanta: https://www.quantamagazine.org/the-year-in-biology-20211221/

Quanta Magazine is an editorially independent publication supported by the Simons Foundation.

Read more | >

It was a big year. Researchers found a way to idealize deep neural networks using kernel machines—an important step toward opening these black boxes. There were major developments toward an answer about the nature of infinity. And a mathematician finally managed to model quantum gravity. Read the articles in full at Quanta Magazine: https://www.quantamagazine.org/the-year-in-math-and-computer-science-20211223/

Quanta Magazine is an editorially independent publication supported by the Simons Foundation.

Read more | >

But this is only one half of the story, as metal-poor stars within the Milky Way may also have come from smaller dwarf galaxies that smashed into and merged with our galaxy throughout its life. By examining these stars’ paths through space while retaining only those that didn’t veer out into the metal-poor regions of the galaxy, the researchers were able to separate out the stars that form the ancient heart from the stars that originated in a dwarf galaxy.

This left researchers with some of the original skeleton of stars around which the Milky Way grew — a population they estimate to be between 50 million to 200 million times as massive as our own sun. As heavier stars die faster than smaller ones, the remaining stars are on average around 1.5 times lighter than the sun, according to the researchers.

“These stars make up about half of the total stellar mass once born,” Rix said. “So, about half of the stars [from the protogalaxy] survive to date.”

Read more | >

Asia’s top chip stocks tumbled Tuesday, ensnared in an escalating US-China tech race that has erased more than $240 billion from the sector’s global market value.

Taiwan Semiconductor Manufacturing Co., the world’s largest contract chipmaker, plunged a record 8.3% while Samsung Electronics Co. and Tokyo Electron Ltd. also declined. The selloff spread to the foreign-exchange market as investors tallied up the damage from the sweeping curbs the US is imposing on companies that conduct technology business with China.

Read more | >