skysight-inc/HackerNews huggingface dataset:
>regenerative braking on the new trains is generating and sending back to the electric grid approximately 23% of the energy consumed by the system

does this make sense? let's round that 23 up to 25%, and say brake energy regeneration is 100% efficient (it's not): one quarter of the energy put into the system comes back out? city driving in a car, you might have your foot on the brake 25% of the time (yes, that's not how it works, just think conceptually) but a train spends a lot of time running, and comparatively a small amount of time braking, and if you were to detach the engine from the train, one doesn't get a sense the train would roll very far unpowered, so while there's momentum to scavenge, it doesn't seem like 25% of the total

I'm just thinking, how do these numbers make sense?
AI songs present as a refined end-product but you don't have to treat them as anything more than killing time or B-grade inspiration for something else. Instrument skills will surely be preserved somewhere due to nostalgia, it's the industry gatekeeping that is coming to an unharmonious end along with all the silly status games if AI songs ever take off.

For instance, why does an indy band need an AI-free backstory but a popstar can outsource all their imagination to the producer who may or may not use autotune or AI riffs?
I imagine the SmartTube app. I use it on my nvidia shield but I also pay for premium. I find it to be the best valued streaming service out there.
Suburbs are absolutely not dense enough for great transit, and the per capita coverage is bad enough the expense isn’t worth it. They can get sparse bus or light rail coverage and thats it. Great transit offers coverage for stops every mile, preferably half mile. Systems like Caltrain and bart are great for regional rail, but anywhere serviced by them is generally not well enough connected that you don’t have to drive to the station.
> Smart switches are a lot better of an idea, and they recognize the reality that most of the time the best time to turn on the light is by touching the switch when entering a room.

i went with precense sensors instead, stuff light up as i move across the house, and will be removing the switches.
Redoing what others have already done is not what I think of when I hear "frontier effort"
I'd believe that necessary primitives are out there, but it's not really enough to have a solution in theory. A crypto project will have to stop such things in practice before they can legitimately claim to have obsoleted the banks.
Cyberattack at UnitedHealth Group last year affected 190M people
I think I understand the use case for a smart surround plugin like this; I watched the demo video and saw and lot of picking-and-pulling text.

What I don’t understand is the development workflow that includes so much text manipulation. If you’re writing new code, there’s nothing to manipulate. If you’re refactoring existing code, wouldn’t you want the support typical AST-based refactoring tools provide? Where’s the sweet spot where shuffling strings around makes sense?

That’s not sarcasm. I’m genuinely asking.
This ruined my damn day.
I can only second that. I don't have a need for their crypto products personally, but everything I've seen from them (both their open source software and their security research) seems to be a level above the competition.
Sometimes you just need to knock on more doors. Increasing your volume will help you find the objections in your pitch.
Aqara is a bit of a mixed bag. A lot of their switches are not Zigbee certified and don't conform to the standard. Specifically, they won't bind directly with devices from other manufacturers.

This might not matter if you're pushing everything through a hub like HA, but if you want to connect directly with other devices and remotes then it likely won't work.
SmartTube Next is GOAT.
You mean like a multi sig wallet? Has been a thing on ethereum for about a decade now. There are also a variety of systems that allow trustless social wallet recovery and other nice creature features that are required in the real world. The programmable nature of ethereum makes these sorts of systems readily buildable.

But its not bitcoin, so somehow its the shitcoin and the glacially frozen development environment that is bitcoin is what all the get rich quick cryptobros obsess about. I will never understand.
Much better really? Looking at the muni map, pretty much all transit clusters around downtown. And bart doesn't even stop at 4th and King. You have to go to Millbrae for a close-ish transfer. Added to that the transit center is very close to the ferry building. And then you have golden gate transit. And it's a hub that has tons of space to accommodate a ton of transfers.

https://www.sfmta.com/maps/muni-service-map
CEO/Founder of Imprint admits to discriminatory hiring practices
Firstly, I believe the trains are EMUs, so every bogey is powered rather than having the whole thing hailed by an engine; this is actually a huge benefit of electric as the trains can accelerate to speed much faster when they’re all wheel drive.

But to address your main point, the rolling resistance of a train in motion is tiny; basically all the energy cost is at acceleration time— it probably cruises at like 5-10% power.
> /We/ are doing our part. The administration needs to be held accountable.

... By the electorate, who clearly aren't doing their part if things like this keep happening.
Activities like mass observation (uk diary program run out of Sussex university, dates back to 1937 with interruptions) can help with trend analysis.

I used to complete a national happiness survey for Australian social science research, from memory it was annual for a while.

The main problem I feel is the confounding behaviours and like problems. Even being asked "are you lonely" can incur burdens. FOMO can feed it, just as much as being online all the time can feed it.

That. And the immensely subjective nature of how people speak, report, ideate how they feel.
That's good to hear. Especially since the electric trains accelerate so much faster than the Diesel ones did. Have you been next to one at takeoff? They're going about 40MPH before the train has traveled its own length. Probably limited more by standing passengers than power. Most of the energy used accelerating is recovered at the next stop, so the fast acceleration does not consume much energy.
I think the point is that having less information available can improve performance because it eliminates processing of extraneous data.

Said another way, stateless approaches are simpler than stateful. There can be an instinct to optimize by using more information, but in this case at least, that was a red herring and adding the constraint improved the results.
You have the causal arrow backwards. A high density train network enables population density and high energy efficiency.

At current population density all of our lives would improve if a network as dense as the tokyo metro appeared in the bay area over night.
I don't live at the house where I ordered my wallet anymore. So that's a relief.
Subsyncarr: An automated subtitle synchronization tool using speech to text
yes will integrate more genres in the feature. especially apple music even have song genres, whereas spotify only has artist genres.
Agreed, hence why the situation is rather pathetic.
> Currently, Caltrain is providing that power to the grid free of charge as there is no legal requirement for the agency to be reimbursed for the energy generated.

With further investment in energy storage it sounds like they could nearly cover a lost subsidy.

Moreover, the improved service from electric (faster acceleration and better air quality) seem very worthwhile.
Do you, Patrick, believe that “Chicago’s African American community is impoverished in part because of extractive practices of vice entrepreneurs?” Phrasing it this way winks that you don’t think so, but perhaps I am misreading you.

However, the conclusion of your article seems to be that Bally’s (a vice entrepreneur) is about to further impoverish them, this time under the guise of ownership but as usual with the support of the local political elites. So for consistency I think your answer should be “yes.”

You’d make a bigger difference in your hometown by conveying this message directly to the folks being targeted, rather than the HN crowd.
Like upgrading from a tube radio to a feature-equivalent SDR implementation, nothing will have changed.

Except that having achieved feature parity, we'll then be in a position to consider new features which may not have been possible on the previous architecture.
You would need to make that script compliant with what the company wants to be compliant with plus their own devops and security practices. The real sell is figuring out how to implement the bespoke human project for each company to save the money.

Also if your script just say for example picks better VM sizes you better be sure there are no outliers where the existing legacy VM size is for a particular reason, be it a reserved instance, negotiated pricing or some technical constraint. Whatever your script does I doubt you can run it as is on any client as root aws and walk away and the customer be happy.

Good luck!
Clearly the intent was well intentioned, but at the same time, conflicts with a fairly obvious legal boundary. Curious if HN founders have run into similar practical issues.
I suppose that's an upside to all the crypto companies being headquartered in Dubai and Singapore. The surveillance state in those places can rapidly track down all the attackers. They don't mess around when it comes to violent crime.
Altermagnetism for next-generation spintronics magnetic memory (2024)
A real world analogue is detective stories that work by adding irrelevant details and it’s up to the reader to filter down to the truly important details to solve the case.

To generalize it, if figuring out what information is important is more expensive than assuming none of it is, better to simplify.
> Would you reimplement a regex engine yourself? I hope not.

Yes, because there are plenty to choose from. ;)

I've implemented parallel-parsing-processes-style [1] parser combinators in at least three languages, though.

[1] https://www.cambridge.org/core/services/aop-cambridge-core/c...
What I do is a greater waste of time -- I have a separate browser profile for each individual site that I might log into, and javascript is only whitelisted for that one site in that profile. It's a real pain because whenever my browser adds a new config option, I have to update the settings in each of the ~20 profiles.

It has saved me a few times where some rogue javascript tries to redirect me to some unexpected site, and the destination site simply doesn't load.
They’re working on a scheme-based plugin system, so… almost!
How is that magic? That's good!

The problem is that Bart network will barely get denser. At the rate they're building it, your great great great great great grandkids will live in a bay area where most people don't need to jump on a car to get to work.

We can do better. It's not magic. But we don't. And that is pathetic.
> It shows me what companies I should support, and which I shouldn’t.

I used to think that way too. Now, I think that all it takes is one bad quarterly report leading to a new CEO, and even the most open of companies can instantly switch to being closed, lock off all their APIs, stop working with open source projects like HA.

I don't know any solution to this, and if I'm honest, being bitten a couple of times has stopped me from experimenting with anything like home automation that requires me to buy physical hardware.
As I said, I'm not using ledger anymore. The new wallet's app does not have location permission and my location is turned off anyways.

VPN is just an extra layer. I'm sure VPN can see I'm connecting to the wallet's servers, but they can't see my crypto balance (I hope the communication is encrypted by the app).
> On the Operator release blog, OpenAI shows an example where they ask Operator to find the highest rated day tour in Rome on TripAdvisor, and then book it. This seems fairly innocuous and cool, remember how we used to do this? You'd have to Google for day tours, browse trip advisor, likely open a few of them, then book the tour. Now, Operator does it all for us and we don't even have to interact with the middle man.

That actually sounds pretty terrible, and the kind of optimization too many people will adopt to just make things bland. The decision reduced to picking the hugest number, under dumb assumption that huger is better for you (not to mention the rating could be gamed). And the user has no visibility so no opportunity to second-guess the algorithm if it's being stupid.

It sounds like someone confused "faster with less friction" with "better."
CSS-zero: An opinionated CSS starter kit for your Ruby on Rails applicatio
I noticed this too. It appears to mostly be funnels into people’s onlyfans. Post some softcore porn on YouTube to bait people into purchasing an onlyfans subscription.
The article is dated 2020 for those who are curious.
Under $50 per cushion repair in today’s money seems super cheap!
This article provides an in-depth analysis of LevelDB's write mechanism, detailing the complete process from the Put interface to WAL logging and MemTable persistence.

Through source code analysis, it reveals how LevelDB achieves 400,000 writes per second throughput through core technologies like WriteBatch merging strategy, dual MemTable memory management, WAL sequential write optimization, and dynamic Level0 file throttling.

It also explores engineering details such as mixed sync write handling, small key-value merge optimization, and data consistency in exceptional scenarios, helping you master the design essence and implementation strategies of LevelDB's high-performance writing.
Skip lists also have [statistically] sublinear times for insertions and range queries. Both are O(logn).

Fenwick trees seem to use much less memory while not being quite as general-purpose as skip lists.
From Salesforce you can go up to the street and get the 38, granted. But to connect with BART or Muni Metro you are walking 2 blocks. At Caltrain you can get the N or T right across from the end of the platform, or board the 15, 30, or 25 bus. The T transfers to BART at Powell, with significant subterranean walking. And for trips within SF you might be closer to your destination starting from Caltrain. You'd crawl through a tunnel to Salesforce to be in Downtown/SoMa, a place everyone wants to leave?
>If you don't trust Ledger – how much do you trust your VPN provider? They know both your original IP and what you're doing on the Internet (or at least to which services you're connecting).

Well, the big difference (for what OP is worried about) is that two distinct companies would need to be compromised instead of just the one.
I stopped using Trezor when they started labeling Bitcoin Cash as Bcash.
Service Reliability
Will look into publishing to the F-Droid. If it isn't lot of work, then will do it.
It is amazing. I loved it. Would you consider to do samething with other apps.
I remember a while back seeing a story from SE Asia about cops finding a guy walking along the road clutching a bleeding hand. Turned out thieves had robbed him off his car, which had a fingerprint reader so they'd taken a finger with the car.

Found the article: https://www.theregister.com/2005/04/04/fingerprint_merc_chop...
That would make it impossible to use this as a testing tool. How should automatic testing of web applications work, if you obey all of these rules? There is also the problem of load testing. This kind of stuff is by its nature of dual use, a load test is also a kind of DDOS attack.
Such things don't count for much if they're not in use. The trick will be getting people to use them effectively. It's more of an education problem than a tech problem.

Also it's not clear that that would work. If I got a call:

> They're gonna kill me if you don't sign this transaction.

I'd probably sign it rather than let my friend die to prove a point to the bad guys that you don't kidnap people on FooChain.
Exactly, and ip address does not give precise location (unless a third company, the ISP, is also compromised).
But only to a mid level developer.
Power is pooled. If I buy from a supplier or group of suppliers that (1) procures only from renewable resources (2) isn’t reselling power from non renewable sources, (3) hasn’t sold the power more than once, and (4) is capable of providing my energy demands at any given time, then I am buying green power from the pool. It doesn’t matter if the actual electrons come from Ng or coal because I bought enough for the pool (the electrons I added to the pool will be used by someone else if I am using ng electrons).

Not 100% sure this is how Caltrain works but the fact that everyone is physically using the same pool does not imply that you cannot be 100% renewable if you buy from suppliers to the pool with the above properties.
Do you have any insights on which hotel brands have the best chairs? Is furniture standardized across brands?
How does it do against captchas?
Not OP, but personally, I subscribe to a different economic theory: by engaging a scammer I am diverting their resources towards me and away from someone else.

It’s not a perfect rationale and I see what you mean but, for me, it would be like confronting a thug on the street when one has good reason to believe they are victimizing someone else out of sight. Would I lose more by confronting them than they stand to gain, or should I just confront them no matter what?
AI Day San Francisco
The local chapters in San Francisco of the Internet Society and Association for Computing Machinery are co-hosting AI Day SF. This one day fundraising (tax deductible) strives to provide a wide view of AI from learning how to integrate AI into systems (training) to several presentations across public and private sectors (thought leadership). This in-person event hopes to provide a one stop shop to get caught up on AI of today! We appreciate your support.
With or without the white on white text?
Quite a few of them, yeah. jQuery UI was a huge, massively widespread thing for a while too.

People still do their own things of course. Like how tons of Windows apps build completely custom stuff (e.g. Winamp). Or very nearly every single videogame.
For me it only works because I never reuse a single terminal for unrelated things. Additionally, I have my virtual desktops grid set up so that different types of tasks are always in certain places, so if the switcher shows a terminal somewhere, I know roughly what it's for even without going to look at it. So I can't "lose" a terminal.

So it's fine for X11 terminals, but not for /dev/tty2

Don't forget you can just :!some-shell-command though - not just in vim but in lots of programs even.
Is there anything that does PWM data over powerline to control lights?

That seems like the best of all worlds.

Networked smart switch. Switch in absolute authority of light. Switch still able offer advanced light features (e.g. hue set).
> WebSocket connections can be unexpectedly blocked, especially on restrictive public networks.

What? How would public network even know you’re running a websocket if you’re using TLS? I dont think it’s really possible in general case

> Since SSE is HTTP-based, it's much less likely to be blocked, providing a reliable alternative in restricted environments.

And websockets are not http-based?

What article describes as challenges seems like very pedestrian things that any rpc-based backend needs to solve.

The real reason websockets are hard to scale is because they pin state to a particular backend replica so if the whole bunch of them disconnect at scale the system might run out of resources trying to re-load all that state
Sounds like YOLO verified the work of the specialists too! (;->
Other than going down to the assembly and yelling what do you propose? We could call the representatives, recall the representatives, create a ballot measure, or vote differently next time.
This is awesome. I was able to play it with a headband magnifier[1] on a 1440p monitor, slowed down 10x. Anything higher density would probably need an actual microscope.

[1] https://www.amazon.com/ProsKit-MA-016-Personal-Headband-Magn...
How is this patentable?
The title seems to be speaking to me(the workers). I'm particularly curious about the 'cons' part. After all, what harm can it do if I know my colleagues' wages or if my colleagues know mine

but:

> Transparency appears to hand employers a powerful bargaining tool: firms can argue that a pay rise for one individual would need to be replicated for others.

> A lower wage bill is not necessarily good news for firms, however. Productivity at affected Danish firms also went down, perhaps because lower earners were fed up to discover they were undervalued or because higher earners resented the slower wage growth that followed.

> Transparency can also stoke motivation. A recent paper by Cédric Gutierrez of Bocconi University and his co-authors found that pay transparency among American academics increased the effort of those who were revealed to be overpaid. If you’re earning a lot more than others, you’d better prove your worth.

Uh, oh, it's The Economist, it's not for me
Santa Clara County is not part of the BART District. The extension to downtown San Jose is being funded by VTA as a service-purchase agreement.
We've changed the headline to be the same as the article's, in keeping with the site guideline: "Please use the original title, unless it is misleading or linkbait" (https://news.ycombinator.com/newsguidelines.html)

(Submitted title was "Kidnappers sever finger of Ledger co-founder David Balland".)
The prime cause of burnout is not saying “no” to being pushed to work extra hours.

You do that by being able to communicate about the trade offs between the holy trinity of projects - on time, on budget and meets requirements.
A lot of these stories don't surface for obvious reasons, though.

In Toronto it happens quite often, not everyday, but way more often than you'd believe.
I can’t tell if Ctrl-` is portable. Anyone know if it’s representable on terminals?
> a voting majority decided that he was the most qualified person for the job.

There's your mistake: the technocratic assumption that elections are job interviews selecting for the "most qualified" candidate.

That's one part, but not the only part. This thought experiment should make it clear: You're voting in an important election. One candidate is an incompetent and unqualified clown, the other is a highly competent and qualified Nazi. You hate Nazis. Who do you vote for?
https://archive.ph/PgFeC
Wow this was huge to learn. Thanks!
Posting like this will get you banned here. (The thread title, when the comment was posted, was "Kidnappers sever finger of Ledger co-founder David Balland".) You may not owe cryptobros better, but you owe this community better if you're participating in it.

If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.
> I've always just closed vim to use the terminal

You don't mind losing all your editor state? If you don't like working with multiple terminal windows, why not open a term within vim with `:term`?
The investigation of the events on this particular website are just a tool to illustrate a much broader point about internet content, identity and LLMs.
I thought scare quotes are sarcastic quotes?
Over 10 years, ~100 physical attacks targeting crypto assets, https://github.com/jlopp/physical-bitcoin-attacks

Physical security primer for Bitcoin (2019), https://www.youtube.com/watch?v=HUgPhPkS2yc
The thread title, when this comment was posted, was "Kidnappers sever finger of Ledger co-founder David Balland". We've changed it now, in keeping with the site guidelines. More at https://news.ycombinator.com/item?id=42819610.