Lifeboat Foundation

A large team of biomedical researchers affiliated with a host of institutions across the U.S., the U.K., Saudi Arabia and France, has learned more about many of the factors involved in xenotransplantation as they conducted a large number of tests on two brain-dead human patients that had received genetically engineered pig hearts.

OpenAI CEO Sam Altman, who has said the 2013 Spike Jonze film is his favorite movie, invited comparisons by posting the word “Her” on X after the company announced the new ChatGPT version. But later, OpenAI executives denied any connection between Johansson and the new voice assistant.

Then the company suddenly dropped the voice.

In a post on X just before midnight Pacific time Sunday, OpenAI said the voice would be halted as it addresses “questions about how we chose the voices in ChatGPT.” A company spokeswoman would not provide further detail.

A Dyson sphere is a hypothetical giant structure that surrounds a star and can capture its solar output. Two separate groups of astronomers have claimed that they have detected dozens of possible Dyson spheres within the Milky Way galaxy. NBC’s Gadi Schwartz speaks with Dr. Michio Kaku about what it would take to create a Dyson sphere and how advanced a civilization would need to be to make it happen.

Astronomers have identified seven star systems in our galaxy that could potentially host a Dyson sphere — a hypothetical megastructure an alien civilization could build around a star or black hole to capture most of its power in the form of radiation.

The concept, first proposed by theoretical physicist Freeman Dyson in 1960, could take on a number of different shapes, from giant cage structures to ring shells to constellations of mirrors.

Of course, it’s an entirely theoretical idea. After all, we haven’t even discovered the existence of extraterrestrial life, let alone an intelligent alien civilization.

OpenAI has introduced GPT-4o, in the form of a digital personal assistant that can interact using text and visuals 🤖

Here, we look back at GPT-4’s performance in human exams from a year ago for comparison.

From the archive:

A new Winows 11 feature that will remember what you did in your PC.

Microsoft has announced a new AI-powered feature for Windows 11 called ‘Recall,’ which records everything you do on your PC and lets you search through your historical activities.

Recall works like a photographic memory for your PC, letting you access everything you’ve seen or done on your computer in an organized way using queries in your native language.

Continue reading “Windows 11 Recall AI feature will record everything you do on your PC” »

Testing two families of large language models (LLMs) (GPT and LLaMA2) on a battery of measurements spanning different theory of mind abilities, Strachan et al. find that the performance of LLMs can mirror that of humans on most of these tasks. The authors explored potential reasons for this.

A hormone already present in the human body could be used to stop Alzheimer’s disease in its tracks, scientists have announced.

Researchers discovered that a small part of an appetite-suppressing hormone called leptin, which is present in everyone, can have dramatic effects on the brain, including stopping the development of Alzheimer’s disease in its earliest stages.

Their tests have shown that leptin can reduce the effects of two toxic proteins in the brain called amyloid and tau, which build up and lead to memory loss and development of Alzheimer’s disease.

A team led by Chen Xianhui and Professor Xiang Ziji from the CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics and the Department of Physics at the University of Science and Technology of China, uncovered a unique superconducting state characterized by one-dimensional superconducting stripes. This state is induced by the ferromagnetic proximity effect in an oxide heterostructure made up of ferromagnetic EuO and (110)-oriented KTaO3 (KTO). Their findings were published in Nature Physics.

The academic community concurs that the emergence of unconventional superconducting pairings is intricately linked to magnetism, particularly in copper oxides and iron-based high-temperature superconductors. Magnetic fluctuations are deemed pivotal in the genesis of high-temperature superconductivity, where the interplay between superconductivity and magnetism gives rise to superconducting states exhibiting unique spatial modulation. Superconducting oxide heterostructures encompassing magnetic structural units emerge as an optimal platform for investigating such superconducting states.

Building upon their prior achievements, the research team delved deeper into the superconductivity of this system and its relationship with the ferromagnetic proximity effect, meticulously adjusting the carrier concentration of the two-dimensional electron gas residing at the interface. They uncovered an intriguing in-plane anisotropy in superconductivity among samples with low carrier concentrations, which nevertheless vanished in samples exhibiting higher carrier concentrations.