Hiroshima scientists turn any smartphone into a radiation detector
8 months ago by Innerworld to c/technology
Well, technically the hair loss is permanent if you die afterwards.
Yes, but a cheap Geiger counter doesn't use AI. Get with the times.
What’s LD50 and LD99?
Other comment is wrong. LD50 = 50% chance of dying. LD99 = 99% chance of dying. The figures I listed are for humans, not mice. LD50 in mice is likely drastically different than LD50 in humans.
Wow i am massivly wrong. A simple wiki search would have set me straight. Sorry all, dont listen to me. (Below is original comment, ill wear my shame on my sleeve)
~~We test on animals. Mice specifically, so we take the amount that killed the mouse and multiply by 50 to get an estimate on the Lethal Dose for humans. So i guess depending on the human the true lethal dose is going to be some where between 50 times the Lethal Dose and 99 times the Lethal Dose.
So "LD" is the amount it took to kill a mouse and 50 times that or "LD50" is the estimated lethal dose for a human~~
Your entire comment is incorrect. LD50 is lethal dose to kill on average 50% of the time. LD99 is the dose that kills 99% of people. The figures I listed are for humans. There’s no way to extrapolate LD50 from other species to humans. There is enough data on humans radiation exposure to directly calculate LD50.
The EBT4 film is designed to change color instantly when exposed to radiation, a change that can be detected by the naked eye.
So, why do I need your system to point a digital camera on the film, if I can see the change on the film? Seems like a solution to a problem that was already solved.
It's not an "if" detector, it's a "how much" detector. It looks like it's using the LED chamber to light the film in a consistent way, and then the phone camera measures the color change to quantify how much radiation it was exposed to.
Ah. I missed that. Ok, this makes total sense then. But the films activate at high doses anyway; doses you'll notice. I guess this system will be especially useful if those films ever become more sensitive.
I guess if you want an automatic alarm, that could be useful.
They already are one though.
@lemmy.world
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related news or articles.
- Be excellent to each other!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
- Check for duplicates before posting, duplicates may be removed
- Accounts 7 days and younger will have their posts automatically removed.
Approved Bots
go to feed...
@lemmy.world
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related news or articles.
- Be excellent to each other!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
- Check for duplicates before posting, duplicates may be removed
- Accounts 7 days and younger will have their posts automatically removed.
Approved Bots
go to feed...
This costs “less than $70”.
You can get a cheap Geiger counter for $50 today and it’s about the same size. I see some for $30-40. These are based on old, proven technology, not some new thing with new unknown problems and an app.
Not that it isn’t neat, but it’s kind of a solved problem.
A 10Gy exposure is well, well beyond hair loss range and into the fatal within days zone. The LD50 is 5Gy, LD99 is 9Gy IIRC. Methinks the author did not do their research on the topic.
save