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The past year has seen a steep rise in generative AI systems that claim to be open. But how open are they really? New research shows there's widespread practice of 'open-washing' by companies like Meta and Google: claiming brownie points for openness while evading actual scrutiny. The question of what counts as open source in generative AI takes on particular importance in light of the EU AI Act that regulates "open source" models differently, creating an urgent need for practical openness assessment.

On January 8, professor and cardiologist Hareld Kemps will hold his oration within the Department of Industrial Design. To improve supervision of patients with chronic heart failure, Hareld Kemps, a cardiologist specializing in sports, took inspiration from the professional soccer players and cyclists that come see him.

A dart that is less sensitive to player errors and is therefore almost 50% more accurate than a conventional dart. TU Delft researchers may have developed a groundbreaking dart that can significantly improve the performance of elite-level darts players. The new dart is designed using knowledge from aerodynamics and flight mechanics and aims to give players more control over their throw.

Just like the professional riders from the Jumbo-Visma team, amateur cyclists will soon be able to analyse and improve their performance. Leiden data scientists working with the cycling team are making their smart data model available so that every serious cyclist can keep track of their fitness. To win major race competitions like the Tour de France, optimal training is vitally important.

Have you ever been amazed by a curveball goal scored by Diego Maradona, Lionel Messi or Christiano Ronaldo? Then you have - possibly without knowing it - been exposed to the Magnus effect: the fact that spinning objects tend to move along curved paths. In a new publication that appeared in Physical Review Letters this week, Robert Spreeuw shows that the same effect occurs to atoms moving through light - and that this effect has practical consequences.