Hacker News: jffry

Solar-Powered Park Bench Air Monitoring Stations in Washington DC

jffry — Fri, 08 May 2026 15:03:18 +0000

Article URL: https://doee.dc.gov/am/release/ddoe-and-epa-announce-unique-solar-powered-park-bench-air-monitoring-station

Comments URL: https://news.ycombinator.com/item?id=48064221

Points: 2

# Comments: 0

New comment by jffry in "NASA Artemis Posters"

jffry — Mon, 20 Apr 2026 12:54:21 +0000

These appear to be the highlights. There's also other galleries in https://www.nasa.gov/gallery/ with a bunch more photos:

https://www.nasa.gov/gallery/artemis-ii-launch/

https://www.nasa.gov/gallery/journey-to-the-moon/

https://www.nasa.gov/gallery/artemis-ii-flight-day-highlight...

https://www.nasa.gov/gallery/lunar-flyby/

https://www.nasa.gov/gallery/return-to-earth/

https://www.nasa.gov/gallery/artemis-ii-splashdown-and-recov...

New comment by jffry in "PostgreSQL production incident caused by transaction ID wraparound"

jffry — Sat, 18 Apr 2026 21:27:53 +0000

tl;dr: autovacuum was seen to be active during an earlier incident, assumed to be at fault, and was disabled. It was never re-enabled. The long-term implications of disabling autovacuum were not actively considered.

New comment by jffry in "The Cathedral, the Bazaar, and the Winchester Mystery House"

jffry — Sat, 04 Apr 2026 12:52:09 +0000

I think the graph is getting cut off for you - for me it reads "Agent Teams"

New comment by jffry in "A Founder Tried to Pitch – and Got a Restraining Order"

jffry — Thu, 02 Apr 2026 13:08:31 +0000

"Workplace violence restraining orders" in California appear to be a type of restraining order that can be filed by an employer on behalf of an employee, to protect said employee from a third party

https://selfhelp.courts.ca.gov/WV-restraining-order

New comment by jffry in "Copilot edited an ad into my PR"

jffry — Mon, 30 Mar 2026 12:26:47 +0000

> We've been including product tips in PRs created by Copilot coding agent

If the PR is wholly authored by Copilot I get the spirit of this, although maybe not the best implementation. And "tips" like this that look like an ad for a product _definitely_ feel like an enshittification betrayal of the user, even if it was a genuine recommendation and not a paid advertisement.

In the OP's situation, where where Copilot was summoned to fix some thing within a human-authored PR, irrelevant modification of the PR description to insert unrelated content is specifically egregious. Copilot can easily include the tip in its own comment, so I'm curious why it was decided to edit the description of a PR instead.

New comment by jffry in "If you don't opt out by Apr 24 GitHub will train on your private repos"

jffry — Fri, 27 Mar 2026 21:37:48 +0000

It's unnecessarily splitting hairs.

> interaction data—specifically inputs, outputs, code snippets, and associated context [...] will be used to train and improve our AI models

So using Copilot in a private repo, where lots of that repo will be used as context for Copilot, means GitHub will be using your private repo as training data when they were not before.

New comment by jffry in "Antimatter has been transported for the first time"

jffry — Wed, 25 Mar 2026 23:19:34 +0000

Nope, it's pretty compact. The first image in CERN's photo gallery shows it being loaded into that truck: https://cds.cern.ch/record/2957407?ln=en

Of course, it's compact because it only has to last so long. CERN's press release discusses needing a generator and a cryocooler in the truck for longer trips: https://home.cern/news/press-release/experiments/base-experi...

This older article about the test they did with ordinary protons, indicates the outer frame measures "2.00 meters in length, 0.87 meters in width, and 1.85 meters in height" and comes in under 1000kg https://ep-news.web.cern.ch/content/cerns-base-step-leap-for...

New comment by jffry in "Nvidia Launches Vera CPU, Purpose-Built for Agentic AI"

jffry — Tue, 17 Mar 2026 13:26:37 +0000

An ASIC is custom silicon, no?

Anyways, I found this article discussing it a bit more: https://www.eetimes.com/taalas-specializes-to-extremes-for-e...

"Taalas is borrowing some ideas from the structured ASICs of the early 2000s to make its hardwired model-specific chips. Structured ASICs used gate arrays and hardened IP blocks, changing only the interconnect layers to adapt the chip to a specific workload. At the time, this was seen as a more cost-effective alternative to a full-custom ASIC that was more performant than an FPGA."

"Taalas changes only two masks to customize a chip for a specific model, but the two masks can change both model weights and dataflow through the chip. On the HC1, the model and its weights are stored on the chip using a mask-ROM-based recall fabric paired with a (programmable) SRAM, which can be used to hold fine-tuned weights and/or the KV cache. Future generations of chips may split the SRAM onto a separate chip, meaning they could be denser than the HC1."

New comment by jffry in "Nvidia Launches Vera CPU, Purpose-Built for Agentic AI"

jffry — Mon, 16 Mar 2026 23:06:03 +0000

It's a tech demonstrator for a company that turns models into custom silicon for fast inference. In this case llama3.1-8b https://taalas.com/products/

New comment by jffry in "Physics Girl: Super-Kamiokande – Imaging the sun by detecting neutrinos [video]"

jffry — Wed, 04 Mar 2026 04:29:17 +0000

For a sense of how crazy 30 detections per day is: Super-K is a cylinder 41.4m tall and 39.3m in diameter [1] and neutrino flux on Earth is 65 billion per square centimeter per second [2]

The tank's cross sectional area relative to the sun depends on its relative orientation to the sun. We'll ballpark it at somewhere between its circular endcaps (Pi x ((39.3/2)^2) = 1213 square meters) and its curved cylindrical face (which, pointed right at the sun, has a rectangular cross section of 41.4 x 39.3 = 1627 square meters).

So, conservatively, the neutrino flux through Super-K's tank is 1400 m^2 x (100cm/m)^2 x 6.5e10 neutrino/second/(cm^2) x 86400 seconds/day = 7.86e22 neutrinos/day passing through the tank. Of which 30 are detected.

[1] https://en.wikipedia.org/wiki/Super-Kamiokande

[2] https://en.wikipedia.org/wiki/Neutrino (end of intro section, just before History). Wikipedia says only that the "majority" of the 65 billion flux is from the sun, so we might be off by a factor of two-ish in the worst case.

New comment by jffry in "Officials Claim Drone Incursion Led to Shutdown of El Paso Airport"

jffry — Wed, 11 Feb 2026 17:52:55 +0000

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

React2AWS: Infrastructure as React Components

jffry — Fri, 30 Jan 2026 02:21:15 +0000

Article URL: https://github.com/mmarinovic/React2AWS

Comments URL: https://news.ycombinator.com/item?id=46819834

Points: 2

# Comments: 0

New comment by jffry in "Raspberry Pi Drag Race: Pi 1 to Pi 5 – Performance Comparison"

jffry — Sat, 24 Jan 2026 21:23:10 +0000

I've done the same thing - making a USB-only printer available on my LAN - following this guide: https://pimylifeup.com/raspberry-pi-print-server/

One nice thing is I can print to the CUPS server even if the printer is off

New comment by jffry in "I wasted years of my life in crypto"

jffry — Mon, 08 Dec 2025 04:35:23 +0000

BTC cannot be split beyond 10^-8

New comment by jffry in "DIY NAS: 2026 Edition"

jffry — Thu, 27 Nov 2025 14:24:28 +0000

Every time I've looked into doing a DIY NAS in the last few years Topton seems to come up - as far as I can tell it's because they make MiniITX boards with a boatload of SATA ports.

New comment by jffry in "End of Japanese community"

jffry — Thu, 06 Nov 2025 03:50:38 +0000

"I'm sorry for how you feel about it" isn't exactly an empathetic opening stance

New comment by jffry in "FCC Accidentally Leaked iPhone Schematics"

jffry — Mon, 29 Sep 2025 23:00:40 +0000

> I doubt Apple could demonstrably prove damages before the civil statute of limitations expires.

Statute of Limitations is about how long you have to file the case, by no means is it a deadline by which you must fully prove damages and have no opportunity to continue your case after it passes.

New comment by jffry in "SimpleFold: Folding proteins is simpler than you think"

jffry — Fri, 26 Sep 2025 22:38:10 +0000

Apparently from a F@H blog post [1] they say it's still useful to know the dynamics of how it folded, in addition to the final folded shape. And that having ML-folded proteins is a rich target for simulation to validate and to understand how the protein works

[1] https://foldingathome.org/2024/05/02/alphafold-opens-new-opp...

New comment by jffry in "You didn't see it coming"

jffry — Wed, 24 Sep 2025 12:28:30 +0000

It's a $12 stock photo, making it even stranger to put any source label on it https://www.istockphoto.com/vector/gm2076276464-564919694