HNHacker News
TopNewBestAskShowJobs

privatelypublic

363 karma · joined June 11, 2025

submissionscomments
privatelypublic··on Overcoming barriers of hydrogen storage with a low-temperature hydrogen battery
I bailed when they left a word out of the title.
privatelypublic··on I regret building this $3000 Pi AI cluster
You theoretically have a year before you even have to apply- but patents are expressly "first to file."
privatelypublic··on I regret building this $3000 Pi AI cluster
I've heard nothing but horror stories on the Jetson & Tegra in general. I'd Avoid it unless the project MUST use a SoM w/ CUDA. which will basically only be Professional stuff. I've never heard of anything hobby level where a PCIe slot was a deal breaker- even with high vibration. (PCIe 4.0 isn't terrible difficult to get good flex cables for)
privatelypublic··on Internal emails reveal Ticketmaster helped scalpers jack up prices, FTC says
Sounds like you haven't been to a venue in a while. Your snark is reality for everything but loyalty points.
privatelypublic··on Classic recessive-or-dominant gene dynamics may not be so simple
Haven't we known the middle school recessive/dominant explanation to be so incomplete as to be wrong for ages?
privatelypublic··on Meta’s live demo fails; “AI” recording plays before the actor takes the steps
Well, it _IS_ a rock after all.
privatelypublic··on Linking to text fragments with a bookmarklet
In windows it should be ctrl+c like always for alert()s- even if the UI doesn't show it. Unless "modern" UI has broken that feature.
privatelypublic··on Nvidia buys $5B in Intel
Tell me again, how fast can you move data from system ram to vram?
privatelypublic··on You Had No Taste Before AI
More examples: look up Dieter Rams (a person). Ran into the name a while back, and man- he made a record player 50yrs+ ago and it was never meant to be in fashion. It sure would still fit in as "simple device that does X" in the 2020's.
privatelypublic··on Flipper Zero Geiger Counter
You'd crash the hardware just as often as the program.
privatelypublic··on Noise cancelling a fan
Not sure then. Maybe concrete really is too hot. Where I am adobe (clay, not company) buildings have traditionally been used in some areas to even out temperatures (desert region. Too hot in the day, too cold at night).
privatelypublic··on Slack has raised our charges by $195k per year
Off topic, but this reminds me of apples worst UI sin in my book: holding the refresh circle bo longer dumps the cache foe the page.
privatelypublic··on Noise cancelling a fan
A 20 or 24" box fan still moves a LOT of air- you should get a decent breeze if you guide the air. the largest mistake I see is forgetting that a fan can't blow if theres no air coming or going- you need openings of equal size (larger is better) between where the fan is and where you want the air to come from/go.

An easy mental model is imaging the air is water. Close a door on a room and it'll fill up and block the hose.

PS: a box fan and a 5" thick MERV13 filter makes a heck of an air filter. 2" likely also will work. MERV13 is great, but some HVAC can't handle it, and it takes a couple passes (term is air exchanges per hour, I think) to capture what HEPA does in a single pass.

privatelypublic··on Noise cancelling a fan
Yup. I'm still learning- but it seems like a Helmholtz resonator would be best in this case.

Since a room has reflections and diffraction of the sound waves, the 312hz they're trying to dampen w/ ANC will be at different phases at different parts of the room. It's also not a point source.

privatelypublic··on DataTables CDN Outage – post incident review
I seem to recall enjoying using datatables. You, or somebody else associated helped me on the forums. Not sure what I asked but I remember two things: positive dev interaction, and the pain of figuring out how to make the OOX/Excel export not lose proceeding zeros. (Had to write my own handler to change the xml)
privatelypublic··on Apple Photos app corrupts images
Something something Railed.
privatelypublic··on Micro-LEDs boost random number generation
Anybody have input on why this isn't a "Paper Tiger"?
privatelypublic··on Meta RayBan AR glasses shows Lumus waveguide structures in leaked video
Or dad jokes.
privatelypublic··on Things you can do with a Software Defined Radio (2024)
Pictures are loading at a crawl, had to bail because the layout kept rerendering.

Looks like hug of death strikes again!

privatelypublic··on Ask HN: Why isn't capability-based security more common?
Have a look at microsoft MSIX.
privatelypublic··on How big a solar battery do I need to store all my home's electricity?
We're to the point calendar aging instead of cycles is the existential threat.
privatelypublic··on How big a solar battery do I need to store all my home's electricity?
LFP's biggest issue is people aren't used to "Phenomenal Cosmic kW/h... itty bitty living space!" Yet.
privatelypublic··on Grapevine canes can be converted into plastic-like material that will decompose
Sorry, I screwed up and misread what you wrote- primarily, a simple "we can do way better than 30mpg." And theres not a lot in the way of wiggle room to debate with any integrity the amount of CO2 burning a set quantity of gas produces. A couple percentage points for NOx and friends and thats it.

I am confused why everybody mentions emissions though. In a discussion on paper/plastic/reusable bags, in a response to a call for napkin math for a claim of "10,000 bags from the fuel needed to get to the store" (essentially the argument made)- CO2 isn't relevant: just the mass of the gas used to get to the store.

I'm not pleased with how this turned out. to be told I'm wrong? That's fine, its the internet. I'm disappointed and alarmed with how badly wrong the suggested corrections are... it's deeply frustrating for me as well.

privatelypublic··on Removing newlines in FASTA file increases ZSTD compression ratio by 10x
I tried building a zstd dictionary for something(compressing many instances of the same Mono(.net) binary serialized class, mostly identical), and in this case it provided no real advantage. Honestly, I didn't dig into it too much, but will give --long a try shortly.

PS: what the author implicitly suggests cannot be replaced with zstd tweaks. It'll be interesting to look at the file in imhex- especially if I can find an existing Pattern File.

privatelypublic··on Grapevine canes can be converted into plastic-like material that will decompose
We farm trees for paper anyway.
privatelypublic··on Grapevine canes can be converted into plastic-like material that will decompose
I didn't forget, its just awfully hard to fit all that on a napkin.
privatelypublic··on Grapevine canes can be converted into plastic-like material that will decompose
Please be careful of such "metrics/statistics." Their very nature means they're politically and financially incentivized lean towards a higher or lower number than "the other guy." And, of course, a big number is scarier in a vacuum. What if a paper bag is 250g of emissions?

The poster child for me for this is low-GWP refrigerants. Sounds good, right? Well, think about how CO2 captured filtered and compressed compares. I'll leave everybody to argue with their-self on this. Does co2 vs r-whatever use more energy? Less? Does it somehow justify the emissions and pollution of manufacture?

My conclusion is... I don't know.

privatelypublic··on Grapevine canes can be converted into plastic-like material that will decompose
Thats comically wrong. Human Resting metabolism is on the order of 20grams of CO2/hr.

See: https://www.sciencedirect.com/science/article/pii/S036013232...

As for a kilo of gas per 10 miles- see https://en.m.wikipedia.org/wiki/Gasoline - says 0.71-0.77g/mL, standard conversion table says 3.785L per gallon. (https://www.engineeringtoolbox.com/volume-units-converter-d_...), and finally- since we're comparing burning gas for a car vs using it in plastic: the figure of merit is petroleum usage, not greenhouse gas emission. Technically, plastic and gasoline aren't going to be 1:1. But that's not napkin math anymore unless you're a petroleum engineer/chemist.

privatelypublic··on Grapevine canes can be converted into plastic-like material that will decompose
30mpg, 10 miles, means two pounds of gasoline, 910grams, knock off or add 100g for ethanol per your preference, a google says about 5grams per bag, so nearly 200 bags.

Nowhere close to 10k, but nontrivial. And, this gets reduced and sometimes outright negated if you reuse the bag. Doesn't mean we shouldn't evaluate if plastic shopping bags are the beat choice though.

I don't think replacing them with store bought doggy poo and cat litter bags is better. It's not a reduction and theres no reuse. If you find yourself discarding them outright, then find an alternative I guess.

privatelypublic··on California age verification bill backed by Google, Meta, OpenAI heads to Newsom
I ember them showing up and then being limited to super shady sites PDQ.

Which makes sense- since exposing minors to pornography was a crime, and got even more illegal somewhere in that time frame, along with the web becoming "professional" (whitehouse top level domain mixup stories anyone?), the honest pornography sites all started self-regulating and asking if somebody is an adult before anything naughty gets shown.

← PreviousPage 3 of 9Next →