2+ week, 4+ day ago   (38+ words) Fluid simulations are one of the "killer apps" of high-performance computing, but if you can't afford the performance, they can take a depressingly long time to run. Depending on your use case, as lon......

6+ mon, 3+ week ago   (632+ words) Today, we take ice for granted. But having ice produced in your home is a relatively modern luxury. As early as 1750 BC, ancient people would find ice on mountains or in cold areas and would harvest it. They’d store it,…...

7+ mon, 3+ week ago   (633+ words) VLEO satellites hold considerable promise, but successfully operating in this unique environment requires certain design considerations. The result are vehicles that look less like the flying refrigerators we’re used to, with a hybrid design that features the sort of aerodynamic…...

9+ mon, 3+ day ago   (346+ words) https://www.nasa.gov/image-feature/japans-northernmost-main-island-of-hokkaido " data-image-caption="Japan’s northermost island of Hokkaido, with the glow from Earth’s atmosphere visible. (Source: NASA, Aki Hoshide) " data-medium-file="https://hackaday.com/wp-content/uploads/2021/07/japan_northernmost_island_hokkaido_from_ISS.jpg?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2021/07/japan_northernmost_island_hokkaido_from_ISS.jpg?w=800" />Recently the MagQuest competition on improving the measuring of the Earth’s magnetic field announced that the contestants in…...

9+ mon, 2+ week ago   (450+ words) [A circular metal vessel is shown, with a symmetrical rotor of four vanes standing inside. At the bottom of the vessel are four loudspeakers.]A Crookes radiometer, despite what many explanations claim, does not work because of radiation pressure. When…...