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ellenhp commented on Roc Camera   roc.camera/... · Posted by u/martialg
dusted · 5 months ago
I don't understand how the "proof" part works, like, what part of the input to the "proof generation" algorithm is so inherently tied to the real world that one cannot feed it "fake" data ?
ellenhp · 5 months ago
If someone cared enough to spend money on this I think it would be an easy to medium difficulty project to use an FPGA and a CSI-2 IP to pretend to be the sensor. Good luck fixing that without baking a secure element into your sensor.
ellenhp commented on RFCs: Blueprints of the Internet   ackreq.github.io/posts/wh... · Posted by u/ackreq
dehugger · 5 months ago
RFC 3339 describes how to record time in a consistent and interopable manner, expanding onto ISO 8601.
ellenhp · 5 months ago
Thanks for the summary of the document, but not quite what I asked for. Why would e.g. a VHDL engineer need to have read it to deserve the title senior?
ellenhp commented on Replacement.ai   replacement.ai... · Posted by u/wh313
beeflet · 5 months ago
It is not a bug, it is a law of nature. The world has limited resources, time and labor being one of them.

The technology proposes a source of labor for the elites so abundant that they will not need to trade their wealth with the eaters.

However much resources you consume, it will be too much to buy for your labor. You will be priced out of existence.

ellenhp · 5 months ago
You're off base here for what may be a rather subtle reason. While I am not a marxist, I do think that the purchasing behavior of the wealthy makes much more sense when you think about things in terms of the labor theory of value.

The evidence for this is all around us. As automation of manufacturing has brought former luxuries into reach for middle-class families, those with means move on to consuming items that require more and more labor to produce. "Handmade" scented soaps. "Artisanal" cheeses. Nobody with money wants their wedding invitation to arrive at a destination with machine-canceled postage. It's tacky. Too automated, too efficient. In fact, I bet the ultra-wealthy don't even use postal mail for delivering their invitations, because it's not labor-intensive enough to be tasteful. Private couriers are probably the move. You can see this pattern over and over again once you know what to look for.

There will always be a demand for human labor, because value is a human construction. That said, the rate at which the economy will change because of AI (if the True Believers are to be believed) is probably too fast for most workers to adapt, so you may not be entirely wrong in your conclusion depending on how thing shake out, but the way you got there is bogus imo.

ellenhp commented on RFCs: Blueprints of the Internet   ackreq.github.io/posts/wh... · Posted by u/ackreq
dehugger · 5 months ago
I dunno, I think many dev are aware of the existence of RFCs, but if your work occurs at higher levels of the stack there is frequently not a pressing need to read them.

For example, you don't have to read the specific RFC to know the difference between 200, 400, and 500 status codes. Any layman's blog post (or literally just reading the response messages accompanying those codes in actual use) is enough knowledge to get you real far.

That said; if a senior dev isn't aware of 3339, the holiest of RFCs, then that's a problem.

ellenhp · 5 months ago
Would you mind elaborating on why you believe people need to have that number memorized to deserve the title senior?
ellenhp commented on EVs are depreciating faster than gas-powered cars   restofworld.org/2025/ev-d... · Posted by u/belter
danny_codes · 5 months ago
What’s extra great about it is that we use fertilizer to grow the biomass to be converted to fuel. And by some measures the energy cost of doing so is higher than just burning the fertilizer (which I’m sure everyone knows is a petroleum product) directly.

Kind of the worst of all worlds sort of technology

ellenhp · 5 months ago
> some measures

EROI for biodiesel is well above 1:1 from what I can tell. Please elaborate on your sources.

ellenhp commented on Show HN: Cardinal Maps – FOSS Android Maps App   github.com/ellenhp/cardin... · Posted by u/ellenhp
ellenhp · 6 months ago
Over the last few weeks I’ve been hard at work building a FOSS maps app for Android from the ground up based on Material 3 components and industry standard maps tooling. It has online and offline modes, and integrates well with self-hosted maps services like Headway[0] deployments. I’m really quite pleased with it and I hope others enjoy using it as much as I’ve enjoyed making it. I’m about 2 weeks in to development so expect some bugs. But it has most of the features you’d expect like search, directions and navigation. It’s shockingly usable already.

I’ve been yearning for something better in the FOSS maps space for a long time. I don’t think I’m the only one. I’m really hopeful that Cardinal Maps can grow into that something for myself and others.

If you’re stoked about this project I’d appreciate contributions and beta testers. There’s an obtainium link in the repo README.md if you want updates. :)

[0] https://github.com/headwaymaps/headway

ellenhp commented on How we replaced Elasticsearch and MongoDB with Rust and RocksDB   radar.com/blog/high-perfo... · Posted by u/j_kao
mips_avatar · 7 months ago
I guess not having that would only breaking forward geocoding from an address?
ellenhp · 7 months ago
My guess is that they're using FastText for semantic search, so it's more likely to break queries like "coffee near me" than address search, the latter likely being handled by tantivy. For context, I've also written a geocoder [0] based on tantivy. :)

[0] https://github.com/ellenhp/airmail

ellenhp commented on How we replaced Elasticsearch and MongoDB with Rust and RocksDB   radar.com/blog/high-perfo... · Posted by u/j_kao
pbowyer · 7 months ago
Doesn't sound like it, but it's a nice writeup of the tools they stitched together. For someone to copy and open source... hopefully :)
ellenhp · 7 months ago
There are a few piece of this that rely on proprietary data, especially the FastText training step, so that's a dead-end unfortunately (would love to be proven wrong). I'd consider subbing in a small bert model with a classifier head for something FOSS without access to tons of user data, but then you lose the ability to serve high qps.
ellenhp commented on How we replaced Elasticsearch and MongoDB with Rust and RocksDB   radar.com/blog/high-perfo... · Posted by u/j_kao
cicloid · 7 months ago
Tempted, specially for switching H3 instead of S2… I prototyped a similar solution a couple of weeks ago, so I could probably do a second pass
ellenhp · 7 months ago
What's wrong with S2? H3 is so much more complex for very little gain from what I can tell.

u/ellenhp

KarmaCake day888August 26, 2018
About
Software engineer and map connoisseur.

ellen.h.poe@gmail.com

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