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ISL

20,410 karma · joined September 21, 2012

Precision experimental tests of gravity: http://charliehagedorn.com

Precision force sensing and metrology: http://nanoradian.com

Errorbars are a good thing: http://measuredmass.com

Email: charlie@hagedorn.xyz

Instagram: https://www.instagram.com/charliehagedorn/

submissionscomments
ISL··on EU sends Apple stark warning over USB-C charging on new iPhones
AC came to predominate precisely because it is easier to work with at an infrastructure level. Stepping voltages with transformers is simple and easy.

If you're AC all the way, there's never a need to rectify your generator, either.

ISL··on US banking crisis: Warren Buffett says bosses should face ‘punishment’
Can be quite a bit -- the low bidder gets the job and gets paid. The higher bidder doesn't get paid and gets to continue looking for work.
ISL··on Google Cloud Storage FUSE
Can this be used to mount Drive under linux?
ISL··on Shoot the arrow, then paint the target around it
Cornell University's fight-song is about failing out of school, or perhaps being expelled.

https://en.wikipedia.org/wiki/Give_My_Regards_to_Davy

ISL··on Why gravity is not like the other forces
If you want to "stick" to spacetime, there must be a reference frame that is somehow different from all the others. There is presently no experimental evidence for any such frame, despite a century or two of searches by very clever people.
ISL··on Ask HN: How many websites, apps or notifications do you look at to “catch-up”?
Too many.
ISL··on Why gravity is not like the other forces
As an experimentalist who worked in the field for a long time, my answer to the title is: The Equivalence Principle.

Because gravitational charge and inertial mass are seemingly inseparable from one another, gravity is special. It is the concept that makes General Relativity possible and the empirical fact that makes gravitational experiments difficult and unlike any other.

ISL··on AI used photographer’s photos for training, then slapped him with an invoice
Attorney-time isn't just for drafting simple documents. It is also for knowing which documents to send and when.
ISL··on Google Authenticator now supports Google Account synchronization
Why did the safe fail to protect the paper -- too hot, too long?
ISL··on Satellite takes image of another satellite
I'm a little sad that the mission-planning team didn't include a "Look out below!" warning on the other side of the plaque.

Dropping a half-ton, two-foot-diameter, sphere of brass out of orbit is something of a health hazard to whatever life forms might have to catch it. If Miley Cyrus needs a follow-up hit, "Wrecking Ball" and "LAGEOS" have the same number of syllables.

ISL··on Satellite takes image of another satellite
GOCE is a wonderful (and beautiful) experiment. Its scientific contributions are particularly wonderful.

When I think of pretty gravity experiments, there are many, as the form must follow the function and gravity is geometry.

I'm particularly partial to the laser-ranging satellites:

https://en.wikipedia.org/wiki/LAGEOS

https://en.wikipedia.org/wiki/LARES_(satellite)

LARES is particularly cool, as it is (and may forever be) the densest object of its mass in the solar system. As so many gravity experiments go, systematic uncertainties are more-important than raw signal, though, so LARES 2 is composed of nickel instead of tungsten. It'll still be quite a day when LARES 1 re-enters; it'd be quite a sight to see.

ISL··on Apple will use 100 percent recycled cobalt in batteries by 2025
We have a battery-recycling bowl at home as well as drawers holding old phones.

My guess is that batteries are more-often recycled than phones/laptops, even just on data-privacy issues alone.

ISL··on Substack Notes Launched
I think Twitter's popularity and endurance suggests that there is interest in that global groupchat.

What's unclear to me is whether or not there is enough money in it to make it worth maintaining/moderating.

ISL··on Previously unknown isotope of uranium discovered
40 minutes is a very long time, especially in the rare-isotope world.
ISL··on GNU+Linux laptops with Libreboot preinstalled, based on coreboot
A sticker or a "skin" might solve the first concern?
ISL··on Paul Graham is an investor in the company trying to kill Twitter
As stated here, too: https://twitter.com/janiskirsteins/status/164464092400422093...
ISL··on His software sang the words of God, then it went silent
If your executor sends GitHub a death-certificate, that problem is completely resolved.
ISL··on Stable Diffusion copyright lawsuits could be a legal earthquake for AI
At ~$150k per willfully-infringed work, infringement at scale gets expensive real quick.

Do you feel lucky? What if a specific version of Stable Diffusion is found to be infringing and there's a way to back-attribute an image to it?

https://www.law.cornell.edu/uscode/text/17/504

ISL··on AI won't steal your job, people leveraging AI will
It seems that the more useful way to use AI would be TDD, where you write the tests and perhaps a simple implementation, and AI makes the implementation good/fast and points out inconsistency in the tests.
ISL··on Stable Diffusion copyright lawsuits could be a legal earthquake for AI
The AI process isn't going away, but suits like these will preserve the opportunity for artists and coders alike to get paid for their work or choose the terms under which it is shared.

Without enforcing copyright rules on AI, it may mean the end of copyright entirely.

I share a lot of images under CC-BY-SA-NC and share code under the GPL. If someone can train a model off my work and disregard the terms under which I have shared it, copyright is my only enforcement mechanism.

ISL··on ‘America does so much more to subsidise affluence than alleviate poverty’
If low-end rents double, building housing looks a lot more attractive.
ISL··on Twitter's Recommendation Algorithm
As near as I can tell, Mastodon doesn't really have #2 in the list above. Last I heard, the social architecture was hostile to comprehensive indexing of the entire fediverse for search.

That's probably one of the biggest reasons that I have remained on Twitter even after setting up a Mastodon persona.

ISL··on Ask HN: How do I move forward after being laid off?
Just adding to the chorus that job-loss is a "qualifying life-event" that bypasses the annual cycles.
ISL··on Major shake-up coming for Fermilab, the troubled U.S. particle physics center
There's a further subtlety -- the US would like to retain the capability to do this work without funding the entirety of the work itself. A lot of the expertise and infrastructure is unique and world-class.

In my view, the entire field is on pause awaiting the development of truly transformative accelerator technology, then it's off to the races again.

"In that sense, this new knowledge has all to do with honor and country but it has nothing to do directly with defending our country except to help make it worth defending." -- Wilson.

ISL··on Facebook is going after LLaMA repos with DMCA's
If Meta has registered the work with the copyright office, the statutory damages in this case, should llama-dl lose, might be quite large.

Check in with an attorney before launching a battle with an opponent who has unlimited resources. There are likely to be many similar test cases in the coming year, perhaps more-readily fought.

ISL··on Facebook is going after LLaMA repos with DMCA's
Readability is one of the key goals of open-source software.

That said, the inclusion of GPL-licensed code in training sets may yet force the release of those models under the GPL.

ISL··on Facebook is going after LLaMA repos with DMCA's
Encyclopedias and journalism are copyrightable even when they include articles about copyrighted works (books, films, etc.).
ISL··on Cesium-137 missing and found in junk yard in Thailand
It is my understanding that there are radiation detectors at the entrances to recycling furnaces (as well as elsewhere in the US transportation-chain) for just this purpose.
ISL··on ‘He passed the bee baton on to me’: people who inherit hobbies
As someone tasked with unwinding a grandparent's ultimately-less-than-economical dream, please check in with your descendants before binding them into a sticky situation.

One of the greatest gifts you can give your heirs is freedom. (and an organized will/estate)

ISL··on ‘He passed the bee baton on to me’: people who inherit hobbies
Are your descendants interested in a syrup-kingdom?
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