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amanda99

285 karma · joined December 4, 2023

Background in applied math, work in ML and software.
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amanda99··on Using Cloudflare on your website could be blocking RSS users
Yes and the most infuriating thing is the "we need to verify the security of your connection" text.
amanda99··on Addition Is All You Need for Energy-Efficient Language Models
That's got nothing to do with perf tho.
amanda99··on AT&T, Verizon reportedly hacked to target US govt wiretapping platform
That's just not even remotely true.

After the PRISM stuff, folks got a lot more savvy with encryption. TLS has been tightened up a lot since then across many fronts (perfect forward secrecy, removing crap roots, certificate transparency, etc).

There's just no way the NSA can be MITMing any reasonable proportion of traffic. Possibly extremely targeted stuff, and sure, there's technically the possibility that Google is handing over keys, but if it was happening at any massive scale, people would now know.

That's why the fight has moved over to metadata now, which is what the three letter agencies are vacuuming up these days.

amanda99··on Hetzner Object Storage
It's interesting that they implement AWS bucket policies, including all AWS-specific syntax/keys/etc, even "arn": https://docs.hetzner.com/storage/object-storage/faq/s3-crede...
amanda99··on Ephemeral IDs: a new tool for fraud detection
Does not explain how this magic technology works.
amanda99··on Self-driving Waymos secure final clearance for expansion beyond S.F
> discontinuities like beating traffic lights

Sometimes you beat them, sometimes you don't. It's not always in your favor, it averages out.

amanda99··on Show HN: Token price calculator for 400+ LLMs
I mean you already pay per output token and (sure, you can limit it), but it's unpredictable given the prompt?
amanda99··on Migrating Uber's ledger data from DynamoDB to LedgerStore
Right, but that's $25m in R&D investment. Much better than $6m in cost of good/services delivered! Former is great innovation and will be ignored by investors because it's just a fixed cost on the way to becoming profitable. The latter is going to appear in the marginal cost of services calculation.
amanda99··on Thinking out loud about 2nd-gen email
I'm not sure if this is sarcasm or not.
amanda99··on Giant batteries are transforming the way the U.S. uses electricity
Energy density on chemical batteries is orders of magnitude higher than e.g. gravity batteries. Also you don't need to rewire a mountain.
amanda99··on Road resurfacing during the daytime without stopping traffic [video]
Seems kind of miserable to work under that bridge all day while trucks are driving over you?
amanda99··on The Internet Archive's last-ditch effort to save itself
I think that's illegal, something like a phoenix company[0]?

[0]: https://en.wikipedia.org/wiki/Phoenix_company

amanda99··on The Internet Archive's last-ditch effort to save itself
You could also do some kind of distributed proof that they still have it: ask every host that claims to have a file compute the hash(prefix+content) of the file, where prefixes differ: distributed k prefixes to each client, and then compare them to get a proof that at least some number of copies exist.
amanda99··on Neon Serverless Postgres is generally available
Does it support extensions like PostGIS?
amanda99··on How to found a company in Germany: 14 "easy" steps and lots of pain
It sounds like these are just issues with processes taking a long time. In other words, that there are long queues. Of course that is a problem too, but it sounds like there's less "active time" and it's more streamlined, if still with long wait times?
amanda99··on Homemade 6 GHz pulse compression radar
The Finns strike again. Just the depth and number of different areas of expertise is insane to me. It seems he planned it all out, had it printed in China, and then 1/2 of the boards actually worked. That's like building a whole backend+frontend app and hoping it works after a month of coding on startup.
amanda99··on Suspicious discontinuities (2020)
It is not: it's inspired by it.

If you look carefully, the numbers are different. In Gary's picture, the cliff is from $29k to $69k or so; the one above is much wider.

Also direct link:

https://web.archive.org/web/20140205020059im_/http://www.aei...

(It is funny though, the picture above seems to be very much from a serious libertarian.)

amanda99··on The Google employees who created transformers
I mean this is how the US operates. Other countries continually try to refine their existing industries and societal structures. In the US, you let everything rot and hope that a hail Mary innovation comes out of somewhere and creates a breath of fresh air. It creates quite a wild society, but it seems to have worked for now!
amanda99··on Suspicious discontinuities (2020)
The main feature of that image is "childcare" which seems to be a fixed subsidy of $16k (and "CHIP", ~$4k related to child health care).

I don't know what the former means and how these are calculated, but if you don't have children, this graph would look a lot less exciting.

amanda99··on Paris preserves its mixed society by pouring billions into public housing
Your top comment sounded pretty sensible and fair but in your responses to comments you now just sound like a troll.

Central planning works very well: that's how every corporation, city, and state works. It works well as long as you apply it to a small enough market and e.g. don't try to plan the whole economy.

The problem in NYC is that there is not enough affordable housing. 40k units is nothing in the housing supply, and the rent inflation has been way too high lately.

amanda99··on European Space Agency to measure Earth at millimeter scale
Ah thanks for the corrections, I guess RTK is what uses the ground station/mobile receiver concept.
amanda99··on European Space Agency to measure Earth at millimeter scale
This does not really seem to be about measuring the earth; it's about more accurate GNSS. Then if you have very accurate GNSS you can also get more accuracy in the ITRF.

Also to add context: there are many hurdles to hitting a 1mm accuracy for a satellite based positioning service.

One can already achieve accuracy of a few cm, but it's a painful process. You basically place a receiver somewhere, keep it there for a few hours, then download the pseudoranges, and post-process on a computer. In post-processing you correct for ionosphere error and satellite ephemerides (the satellites broadcast their rough location and clock readings, but you can download much more accurate data for these later to get a much better idea of where the satellites were). You need to do post-processing after some delay, because ionosphere readings and satellite ephemerides are not available immediately (the accuracy increases as you wait longer!).

You can also extend this with what's called "Precise Point Positioning" (PPP) using one ground-station that broadcasts an extra signal to moving receivers nearby, so there are ways to get higher accuracy on moving receivers, but it's still painful.

So probably 1mm will come soon to fixed ITRF monitoring stations (basically the ITRF tries to track tectonic movements, etc as those are at the mm level), but it's very far from coming to drones or cars.

amanda99··on European Space Agency to measure Earth at millimeter scale
Apparently the US Navy has this kind of system for positioning of submarines to correct inertial navigation system errors. Allegedly they also have very good maps of large swaths of the ocean floor to make it useful.
amanda99··on New Bounds for Matrix Multiplication: From Alpha to Omega
Those are by and large many small matrices being multiplied, these results have nothing to do with that.
amanda99··on New Bounds for Matrix Multiplication: From Alpha to Omega
No, these aren't practical algorithms. No one uses them in reality.

The hope is that these small improvements will lead to new insights that will then lead to big improvements. I doubt how matrix multiplication will be done will really change regardless of these theoretical results, unless something really groundbreaking and shocking is discovered.

It's all relatively pretty in the grand scheme of things.

amanda99··on You cannot simply publicly access private secure links, can you?
> CF doesn't sell it or use it for marketing

Any source for this? Do you work there? I checked their docs and they say they don't "mine user data", so I wouldn't trust anything they say, at least outside legal documents.

amanda99··on Cloudflare Mines 1.1.1.1 Data
I imagine they had a lawyer clear this and so there must be some convoluted argument by which they think this is fine.

However, it still makes me lose trust in Cloudflare, this is pretty clear language to me that data is not used for anything but debugging, yet here we obviously see user data being mined for analytics.

amanda99··on Cloudflare Mines 1.1.1.1 Data
Put a private domain there and it'll show you data from your usage of 1.1.1.1.

On their page however, they claim "By contrast, 1.1.1.1 does not mine user data. Logs are kept for 24 hours for debugging purposes, then they are purged." under "What makes 1.1.1.1 more secure than other public DNS services?" [0]

[0]: https://www.cloudflare.com/learning/dns/what-is-1.1.1.1/

amanda99··on You cannot simply publicly access private secure links, can you?
Yes, people share usernames and passwords, but there's no single canonical string, like "username=amanda99&password=hithere". For example most of the time when I share user/pass combos, they are in separate messages on Signal. You type them into two different boxes, so you normally copy the username, then the password in separate actions.
amanda99··on You cannot simply publicly access private secure links, can you?
Off topic: but that links to cloudflare radar which apparently mines data from 1.1.1.1. I was under the impression that 1.1.1.1 did not use user data for any purposes?
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