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01 / 05
Breakthrough Step Toward Revealing Hidden Structure of Prime Numbers

Science | Science & Education

Breakthrough Step Toward Revealing Hidden Structure of Prime Numbers

“Just as molecules are composed of atoms, in math, every natural number can be broken down into its prime factors—those that are divisible only by themselves and 1. Mathematicians want to understand how primes are distributed along the number line, in the hope of revealing an organizing principle for the atoms of arithmetic.

‘At first sight, they look pretty random,’ says James Maynard, a mathematician at the University of Oxford. ‘But actually, there’s believed to be this hidden structure within the prime numbers.’

For 165 years, mathematicians seeking that structure have focused on the Riemann hypothesis. Proving it would offer a Rosetta Stone for decoding the primes—as well as a $1 million award from the Clay Mathematics Institute. Now, in a preprint posted online on 31 May, Maynard and Larry Guth of the Massachusetts Institute of Technology have taken a step in this direction by ruling out certain exceptions to the Riemann hypothesis. The result is unlikely to win the cash prize, but it represents the first progress in decades on a major knot in math’s biggest unsolved problem, and it promises to spark new advances throughout number theory.”

From Science.

Rest of World | Motor Vehicles

Chinese Robotaxis Are Catching Up to Silicon Valley’s

“The Alphabet-owned Waymo, which launched the world’s first fully driverless service in Phoenix in 2020, remains the largest operator in the U.S. But Chinese rivals are quickly catching up in both scale and technological capability. Chinese tech giant Baidu recently announced its Apollo Go robotaxi service has completed more than 11 million rides, surpassing Waymo’s reported 10 million. The company is now testing in Hong Kong and the United Arab Emirates, with reported plans to expand to Switzerland and Turkey. 

Top Chinese contenders WeRide and Pony.ai — both listed in the U.S. and backed by investors including Nvidia and Toyota — are also rapidly expanding through partnerships with Uber in Europe and the Middle East. Both companies have secured permits to test in the U.S.  

Meanwhile, Elon Musk recently said Tesla will launch its much-delayed robotaxi service in Austin this month, with San Francisco and Los Angeles to follow.”

From Rest of World.

Rest of World | Health & Medical Care

AI Is Making Health Care Safer in the Remote Amazon

“The Amazonian municipality of Caracaraí has 22,000 inhabitants and an overworked pharmacist named Samuel Andrade.

Andrade arrives at work at 8 a.m. to handle hundreds of prescriptions from free government clinics. Most days, he can’t get through all of them. He sometimes gets stuck for hours cross-checking drug databases to ensure nothing has been prescribed incorrectly by rural doctors. 

It is stressful work. He has to help the dozens of patients who line up at his dispensary every day, some of whom have traveled for days to get there. Sometimes he has to rush through prescriptions, and worries he will miss something dangerous.  

In April, Andrade welcomed a new assistant: artificial intelligence software that flags potentially problematic prescriptions and digs up the data to help him decide if they are safe. It has quadrupled his capacity to clear prescriptions, he told Rest of World. In the months since he started using the AI assistant, it has caught more than 50 errors, he said.”

From Rest of World.

Nature | Communications

Brain Implant Lets Man Speak with Expression — And Sing

“A man with a severe speech disability is able to speak expressively and sing using a brain implant that translates his neural activity into words almost instantly. The device conveys changes of tone when he asks questions, emphasizes the words of his choice and allows him to hum a string of notes in three pitches.

The system — known as a brain–computer interface (BCI) — used artificial intelligence (AI) to decode the participant’s electrical brain activity as he attempted to speak. The device is the first to reproduce not only a person’s intended words but also features of natural speech such as tone, pitch and emphasis, which help to express meaning and emotion.

In a study, a synthetic voice that mimicked the participant’s own spoke his words within 10 milliseconds of the neural activity that signalled his intention to speak. The system, described today in Nature, marks a significant improvement over earlier BCI models, which streamed speech within three seconds or produced it only after users finished miming an entire sentence.”

From Nature.

The Guardian | Science & Technology

An AI-Based Tool Restores Age-Damaged Artworks in Hours

“The centuries can leave their mark on oil paintings as wear and tear and natural ageing produce cracks, discoloration and patches where pieces of pigment have flaked off.

Repairing the damage can take conservators years, so the effort is reserved for the most valuable works, but a fresh approach promises to transform the process by restoring aged artworks in hours.

The technique draws on artificial intelligence and other computer tools to create a digital reconstruction of the damaged painting. This is then printed on to a transparent polymer sheet that is carefully laid over the work.

To demonstrate the technique, Alex Kachkine, a graduate researcher at Massachusetts Institute of Technology, restored a damaged oil-on-panel work attributed to the Master of the Prado Adoration, a Dutch painter whose name has been lost, as a late 15th-century painting after Martin Schongauer…

In an accompanying article, Prof Hartmut Kutzke at the University of Oslo’s Museum of Cultural History, said the approach provided a way to restore damaged paintings faster and more cheaply than was possible with conventional techniques. ‘The method is likely to be most applicable to paintings of relatively low value that would otherwise be housed behind closed doors, and might not be suitable for famous, valuable artworks,’ he said. ‘However, it could widen public access to art, bringing damaged paintings out of storage and in front of a new audience.'”

From The Guardian.