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pbmonster

1,185 karma · joined January 19, 2010

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pbmonster··on How Delhi cut electricity loss from 50 to 5 percent
How did you get that number? Is this just a quip about batteries?

Most of India has a solar capacity factor >0.2 and low seasonality. That means even 5kW peak rooftop panels and a 10 kWh battery will get you over 95% almost always. And panels+labor is so cheap in India, there's really no reason not to just tile the roof in panels.

Things get more difficult in dense cities, if you have multi story apartment blocks going 90+% locally is impossible. But then just transmit power from lower density rooftops, or actual solar farms.

And this already assumes widespread AC (really no way to increase electrification this much and not add AC in that climate).

pbmonster··on Maybe don't let Muse run your Facebook Marketplace account
> "that's on me, I'm owning that, I'm sorry, that shouldn't have happened"
pbmonster··on PipePipe: NewPipe hard fork implementing SponsorBlock
Does it auto-update now? I like its UI better than PipePipe, but I got so sick of hand-updating Vanced (including hand-downloading the correct apk and waiting several minutes for the patches to run against it) every time Google breaks Youtube again. There was a period of Warfare last year where Google would make breaking changes more than once a week...

PipePipe is so nice with the fast auto-updates. If I ever even catch it breaking, I just have to use Firefox for a few hours and then F-Droid ships the fix and PipePipe works again.

pbmonster··on The Return of Sail Power: Cargo Ships Are Turning Back to the Wind
But you would need maglev if you wanted to compete on energy per ton of cargo per mile. Ships are several times more efficient than classic trains.
pbmonster··on iPhone Duo
> At 2% of sales, the opportunity cost is the reason to kill the product. Keep in mind this still needs design, manufacturing, marketing, and distribution resources.

All this is true for many other products, specifically cars. Ford makes the Bronco Sport anyway, and they make money on it.

I get it, Apple has much better margins than Ford. And maybe a iPhone 18 Mini would reduce total margin for them. But if they move a couple of million units, it absolutely would make money.

pbmonster··on Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls
> enough ammonia in the air will suffocate you.

It will suffocate you on account of all that blood pulp in your lungs. And eyes, and nasal mucosa...

Having a high pressure ammonia leak indoors is a death sentence for anybody in the same room. Same building, if it's large enough...

pbmonster··on Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls
Technically, you could also just pull refrigerant lines from the heat pump to the bath tub - you probably already run those to the indoor AC units you have in different rooms anyway - or connect the bath tub to the hot water lines you run to the radiators. Both imply a grey water heat exchanger built into the tub.

Depends on setup, of course. If there's a central AC blowing hot/cold air through ducts, you're stuck using a grey water loop. But it is the least attractive setup...

pbmonster··on Show HN: The same nine streaming subscriptions cost $702/year more than in 2021
Total consumer-price inflation has been about 27.7% since 2021.

Inflation is multiplicative, so: 1.277 * 1.26 = 1.61 giving us the 61% subscriptions went up.

pbmonster··on iPhone Duo
Of course, they never even brought it to the US. It has no chance there, there's barely a market for lowslung station wagons, and close to no market for EV wagons. Always was a niche in the US, while it was always the primary family vehicle in Europe.

And yes, VW is fighting for survival. The things they are killing are the low volume models specific to the Chinese market (because absolutely nobody in China is buying any VWs) and a lot of the variants and overlaps they've accumulated over the years. They'll continue making less than 100k iD.7s, and will be happy to do so (it's modestly profitable).

pbmonster··on iPhone Duo
I don't get that mentality. Millions of units, shares many parts with other models, OK margin. This is no reason to kill a product.

For comparison, that's roughly like Ford killing the Bronco Sport, or VW killing the ID.7.

pbmonster··on The Navier–Stokes Millennium Prize Problem
That's not correct for a SOTA model with trillions of parameters. Those have immense amounts of knowledge trained into their parameters. Try it. It "remembers" the ending of random books, Goosebumps and otherwise.

That's the entire point of why knowledge cutoff is so important (if you use them offline).

I find it entirely believable that the Navier-Stokes conversation was auto-flagged as high value training data, and burned-in the models knowlegdge base.

pbmonster··on The Navier–Stokes Millennium Prize Problem
But this is different, right?

The equivalent would be taking a (fully offline) LLM and asking it about the ending of one specific Goosebumps book, and it revealing the twist. And although that specific book was (probably) only once in the training data, a high parameter LLM can usually "remember" the twist.

pbmonster··on Mistral raises €3B
> Is that not self evident by the insane revenue from frontier labs?

No...? Of course not?

Because revenue is only one side of the equation. Did you ever look at total cumulative OPEX and CAPEX, and how long it will take them to even just break even at current growth?

pbmonster··on Three schoolgirls in Kinsale pulled up a pea plant covered in warts (2014)
> You would think that scientists would spend more effort trying to create "super" rhizobacteria that can colonize even more aggressively and also fix many times more nitrogen than ordinary ones

I think the problem with that idea is that the rhizobacteria needs energy to break the nitrogen tripple bond. A lot of energy. It gets that energy by getting carbohydrates from the host plant - which in turn are not available to the plant to grow.

I'm sure there's plants where not fertilizing with nitrogen at all would make the trade-off worth it, but the vast majority of our optimized crops can't spare double-digit percentage points of their total yield to feed bacteria. You're much better of just using natural gas (or green hydrogen) to fix the nitrogen.

pbmonster··on Qwen3.8-Flash-Next
The N-gram parameters can be fetched from SSD, with maybe the hottest ones staying in memory.
pbmonster··on Pixel Watch 5
Compete with Garmin instead of Apple.
pbmonster··on How I use LLMs to learn complex topics
Good news: nobody does.
pbmonster··on Everything you do is being recorded
From the hardware side, extremely precise. Most discussions assume the sweet spot for ISAC is in "Frequency Range 3" (7 - 24 GHz, decent penetration and range, very good resolution), and in that range you can pin down objects with millimeter precision (both position and velocity). So, not only can you detect people walking down the street, you can detect them breathing when they stand perfectly still.

This, of course, requires 6G base stations to be spaced pretty tightly (hundreds of meters apart) and to feature sophisticated phased array antennas. But both can be assumed in cities (they're planning to completely replace WIFI with 6G, so every current WIFI access point will become a 6G micro cell). Walking humans can be detected much easier, but radar SNR is funny, that only gives you 4x-6x the detection range.

Software (signals processing) for all that will be... a lot of difficult work. Object separation/tracking, multipath reflections, clutter suppression, ect.

pbmonster··on Atomarine: Nuclear Data Centers at Sea
It's a drop in a bucket. Global warming is due to ~5e18 Wh of excess heating. A nuke dumping 5e12 Wh of additional heat into water makes no difference at all.
pbmonster··on The Project of Software Is Complete
The article poses the question "What do you want your phone/computer to do that it can’t", and suggests that there really is nothing left - software is done, all remaining problems are hardware.

I can't think of many things, but there are a few: I want an LLM teaching 1 on 1 language lessons. Good ones, with tailored vocab, tailored reading, tailored listening, grammar lessons, and (most importantly): conversation training including it correcting my pronunciation and grammar.

Current LLMs can do most of that when prompted correctly (and supplied with textbooks and podcasts), just the last part is missing.

But what else is there?

pbmonster··on US citizen charged after GrapheneOS phone wipes during airport search
> the issue is that when a phone is unlocked, they can just plug in a USB device and scrape everything off it

That's useless if the backup account and the main account use different keys for the home partition.

VeraCrypt (used to?) have this. It was called a hidden volume. One volume, but two keys, two passwords, and two different containers full of data. Technically, the second volume is written into the partition "from the back" using key 2, while the first volume is written "from the front" using key 1.

Fun fact, there's no protection against writing over data in the other volume if volume 1 + volume 2 exceed the size of the partition - and there can't be, otherwise the volume wouldn't be hidden.

pbmonster··on StreetComplete: Fixing OpenStreetMap, one tiny quest at a time
> Basically, I am never confident I am editing OSM correctly.

This is the case for the majority of users. The rules are complex and not always obvious or clearly defined. The world is complex, unfortunately, and so is describing it accurately.

One of OSM killer features for me is finding drinking water along the route when I'm hiking/biking/exploring. Unfortunately, there isn't a single, consistent label used for all sources of drinking water. So I have to check amenity=drinking_water, man_made=water_tap, amenity=fountain, one after the other.

I think StreetComplete has missions to add the label drinking_water=yes to all of those, so the situation might improve in the future.

pbmonster··on StreetComplete: Fixing OpenStreetMap, one tiny quest at a time
> It sucks that Google is probably using OSM data to check what they are missing and adding it to their maps

No way they are doing this deliberately globally. My city has a lot of pedestrian stairs interconnecting roads, and not a single one is on GMaps. If you navigate on foot, it will send you on walks 2x-3x longer than necessary.

OSMand and CoMaps reliably find the shortest way. And can tell you the pavement type, number of steps, stroller ramp and hand rail situation of every single one of those stairs.

Google has a really hard time adding roads without frequent car traffic, I think.

pbmonster··on StreetComplete: Fixing OpenStreetMap, one tiny quest at a time
The thing lacking even more is a good search engine. Doesn't matter how complete the database is when search keeps missing text appearing verbatim in a label.
pbmonster··on CoMaps – FOSS Offline Maps
You can edit existing trails, but directly adding new ones is not intended. What you can do is create a GPS track, and then upload it with a note describing the problem.

I use the app Vesspucci for actual editing, it works well (but larger changes to OSM is a "full PC" kind of task). Notes from StreetComplete (from all users) show up on a TODO list in the app, so the more advanced users can decided on whether they want to create a node on the map from the note.

pbmonster··on OpenWrt One – Open Hardware Router
> it was originally alternate firmware for the Linksys WRT54G router from 25 years ago

There's a couple of fun examples like that. xda-developers is named after the O2 xda, a smartphone from 25 years ago that not many people ended up developing software for.

pbmonster··on Android Developer Verification: Threat masquerading as protection
> we'll ditch phones altogether in 10 years when smart glasses will replace them instead.

Billions are spend right now to make sure the glasses also run Android or iOS. So far, Google, Samsung, Magic Leap, RealWear and Vuzix are working with/on Android XR, and obliviously Apple is working on AR/VR iOS.

Meta and a couple of smaller startups are doing something in-house, but I don't give them much chances to get an ecosystem going.

pbmonster··on Oomwoo, an open-source robot vacuum you build yourself
There's much to criticize about the dev, but there's really no way to make it significantly easier. Most robovac companies just don't want you to flash the firmware.

The dev opposes selling the connector PCBs, but people have always ignored that and sold them online. They're not hard to find, but having the PCB is really only the first step.

pbmonster··on "Fix" MacBook Neo Cursor Lag: Record 1 Pixel of the Screen Every 10 Seconds
Reminds me of a fix I wrote a decade ago. My Laptop would sometimes start emitting a high frequency whine when on battery. I figured out it only happened when the CPU went into performance states lower than P2 for power saving.

So I wrote a bash script that auto-started on battery mode and then calculated a hash every few seconds. Boom, whine solved. Terrible fix, but I never measured how much battery it cost me, so it was... fine.

pbmonster··on Steam Machine launches today
Not really. Can't really map a touchpad as an analog stick. Can't map a gyro as a joystick. Can't take XBox rumble and map it to the Steam Controllers haptic feedback.

Can you hack it together in theory, get something working but making sacrifices left and right? Sure. But why would Valve want to do that? Use experience would be incredibly bad.

But give it time. There will be a standalone driver for Windows eventually, either from Valve or from the community.

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