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Jan 4, 2025

Entropy of black holes with arbitrary shapes in loop quantum gravity

Posted by in categories: cosmology, quantum physics

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Year 2021 face_with_colon_three


The quasi-local notion of an isolated horizon is employed to study the entropy of black holes without any particular symmetry in loop quantum gravity. The idea of characterizing the shape of a horizon by a sequence of local areas is successfully applied in the scheme to calculate the entropy by the S O(1, 1) BF boundary theory matching loop quantum gravity in the bulk. The generating function for calculating the microscopical degrees of freedom of a given isolated horizon is obtained. Numerical computations of small black holes indicate a new entropy formula containing the quantum correction related to the partition of the horizon. Further evidence shows that, for a given horizon area, the entropy decreases as a black hole deviates from the spherically symmetric one, and the entropy formula is also well suitable for big black holes.

Jan 4, 2025

WHO declares Mpox global health emergency

Posted by in categories: biotech/medical, health

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The World Health Organization (WHO) has declared the mpox outbreak in parts of Africa a public health emergency of international concern.

The highly contagious disease — formerly known as monkeypox — has killed at least 450 people during an initial outbreak in the Democratic Republic of Congo.

It has now spread across parts of central and east Africa, and scientists are concerned about how fast a new variant of the disease is spreading and its high fatality rate.

Jan 4, 2025

World’s most powerful anti-fungal drugs make fungi commit suicide: Study

Posted by in category: biotech/medical

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University of Exeter scientists found that common antifungals cause pathogens to self-destruct.


The study reveals that the most common anti-fungals prompt pathogens to undergo self-destructive processes.

Jan 4, 2025

“Extraordinary” phenomenon as a white dwarf star flickers “on and off” every 30 minutes

Posted by in category: cosmology

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The white dwarf’s brightness plunges in a mere 30 minutes—faster than any observed before.

Jan 4, 2025

Astronomers have discovered the largest radio galaxy ever, 100 times larger than the Milky Way

Posted by in category: space

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Astronomers discover massive radio galaxy 100 times larger than the Milky Way.

Jan 3, 2025

Gramicidin: Interesting Wikipedia article on gramicidin: a non-ribosomal peptide which can be used as a topical antibacterial (against gram positive bacterial)

Posted by in category: biotech/medical

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Gramicidins work as antibiotics against gram-positive bacteria like Bacillus subtilis and Staphylococcus aureus, but not well against gram-negative ones like E. coli. [ 3 ]

Gramicidins are used in medicinal lozenges for sore throat and in topical medicines to treat infected wounds.s are often mixed with other antibiotics like tyrocidine and antiseptics. [ 4 ] s are also used in eye drops for bacterial eye infections. In drops, they are often mixed with other antibiotics like polymyxin B or neomycin. Multiple antibiotics increase efficiency against various strains of bacteria. [ 5 ] Such eye-drops are also used to treat eye infections of animals, like horses. [ 6 ]

[ edit ].

Jan 3, 2025

Surveying the Effects of Quality, Diversity, and Complexity in Synthetic Data From Large Language Models. Surveying the Effects of Quality, Diversity

Posted by in category: futurism

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Surveying the effects of quality, diversity, and complexity in synthetic data from large language models w/ alex havrilla of georgia tech.

Speakers: Cecile Tamura, Robert Pray, Riju Pahwa

Jan 3, 2025

Fast-Switching Luminescent Nanocrystals Could Make Computing Low-Energy

Posted by in category: robotics/AI

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AI is driving a surge in energy consumption, but tiny crystals that can toggle between light to dark, and stay there indefinitely, could be the answer.

Jan 3, 2025

Understanding And Preparing For The 7 Levels Of AI Agents

Posted by in categories: business, robotics/AI

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Agentic AI will be a critical differentiating capability. This framework can help business executives define, understand, and prepare for artificial intelligence agents.

Jan 3, 2025

Robots In Space — Mars Express

Posted by in categories: robotics/AI, space

A new episode of Robots In Space will premiere on Saturday, January 4th at 1 PM PT.

The topic is the mysterious Noctis Labyrinthus — Labyrinth of Night — on Mars! Mars Express is one of the spacecraft investigating it.

Continue reading “Robots In Space — Mars Express” »

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