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Tux Machines
Posted by Roy Schestowitz on Apr 06, 2023
> Tomography is a way to look at the internal structure of an object (a cell, your brain, a priceless artefact that you suspect is a forgery) without cutting into it mechanically. There are lots of different types of tomography, but in general, you aim some kind of wave (X-rays, visible light, gamma rays…) at the object you want to investigate, and measure what gets through to the other side.
> Over the years, we’ve seen some modern microcontrollers turn out to be 5V-tolerant – now, RP2040 joins the crowd. Half a year ago, when we covered an ISA card based on a Pi Pico, [Eben Upton] left a comment saying that RP2040 is, technically, 5V tolerant for GPIO input purposes. The datasheets don’t state this because the reality of 5V tolerance isn’t the same as for natively 5V-tolerant chips – for instance, it doesn’t extend all the way to 5.5V for it to be ‘legally’ 5V-tolerant, as in, what 5V tolerance typically means when mentioned in a datasheet.
> To test experimental cancer-fighting therapies, researchers need cancerous tumors to treat. While lab animals, like mice, can provide those tumors, they come with many downsides. From ethical concerns to practical reasons, such as tumor isolation and repeatability, "natural" tumors come at a cost. Artificial tumors, made using real cells, can solve these problems.
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