skysight-inc/HackerNews huggingface dataset:
The article claims "In Lagrangian Mechanics you minimize the total energy of a system to find its motion". But if you actually look into it, you derive Lagrangian Mechanics by minimizing (or maximizing) the _action_. Action in this context is defined as the integral over the Lagrangian, or in other words the _difference_ between kinetic and potential energies (not their sums). The author knows that because later he states "All physical processes take the path that minimizes total action." and gives the corresponding mathematical expressions.

Also the statement about the Lagrangian being representation independent is misleading. The formalism stays the same and this is great for picking "suitable" coordinates that makes solving the system easier, but how the Lagrangian looks and how the equations of motion for the coordinates look can be quite different. This is actually what makes Lagrangian mechanics so powerful. You can transform coordinates (possibly several times) to get the Lagrangian into a simple shape and get equations of motions you can actually solve. You have transformed some of the difficulty of solving differential equations into the difficulty of finding natural coordinates, something humans tend to be better at.

The point that the multipliers \lambda_i that appear when modeling constraints should be names "Lagrange multipliers" has already been raised.
That does sound like a better idea than just waiting and hoping it won't collapse on me
> Why?

As people already pointed, redundancy. Those systems have a lot of engines.

The simplest ones have fixed engines, and the most complex ones have then engine move in a single axis. Both are much simpler than an helicopter.

Electrical motors inherently require less maintenance, what isn't as large a change as it seems.

All the e-VTOL designs I have seen can glide, what places them on the same category as airplanes, that require much less maintenance than helicopters.
Ayup.

I think I'd heard of Anaconda in that context, though didn't make an immediate association with your original comment.

It also raises some interesting questions about the prominant featuring of "D'Anconia Copper" in a popular if grossly flawed bit of popular juvenile fantasy literature.

The Johnston County War is another personal fave:

https://ello.co/dredmorbius/post/xwjjk1bh7yki6ja4lrg7ka
Red Hat Enterprise Linux 8.1 adds live Linux kernel patching
> No money changes hands, so safer for drivers.

All their taxis do card payments, and have done card payments for decades before Uber.

> No payment is made in the vehicle, so faster exit times.

They didn't have that option when they launched the app with GPS booking, but they added it later. It now works just like Uber, you have cards on your profile, it charges your chosen card after the trip.

> Uber records all trips, so easier to work out costs to expense.

Of course they can email you your receipts if you want.

> Uber uses any credit card, so your boss can pay for your ride without the need for separate expensing.

So does this taxi app. Companies can also have accounts with the taxi company, so if it's a work trip you just use the company account that you've already entered into the app.

> Driver and passenger are tracked, so there it is easy to find who did what. There are a lot of rape charges and cases against Cabbies.

There are not a lot of rape charges and cases against cabbies in Stockholm, at all, so that's not a problem to solve.

> Rating - I've been in a LOT of awful, awful cabs.

Taxis in SF are godawful compared to taxis in Stockholm, so yeah, if you're used to the shitty cabs of SF, Uber is a step up. If you're used to pretty much every single taxi being a Mercedes like in Stockholm, Random Dude's Toyota is a step down.

> Drivers can work 1 hour and make some money. Try that with any other job.

That doesn't affect me as a customer, really. Also, when I get in a taxi in Stockholm I know I'm getting a properly licensed and insured ride, not just some gung-ho gig-economy hopeful who is driving his Toyota an hour a week.

Like I said, I understand that Uber was a step-up for the SF taxi market, but there are plenty of markets where it isn't, and where it's much-hyped technological invention just isn't very hard to replicate for local competition.
He perhaps could get a job with them but remote work still isn't largely available, and Normal Ill isn't a big tech city.
Edward Snowden Calls Out 'Abuse' of Facebook, Google, Amazon Business Models
Some binaries are obfuscated by overlapping several routines together.
The way that I tend to think of it is that democracy is a type of society not just a form of government. That is a society is democratic not so much because they vote but because they follow ideals such as freedom of speech and self determination.
Or, buy any reasonably newish used car with reasonable parts availability, drive it gently, and keep it well maintained.

Over the long haul an electric car should be superior in total lifecycle emissions relative to a comparable ICE or hybrid, but Tesla’s questionable initial build quality (reworks figure into total emissions!) and odd design choices (like needing to replace the flash unit for the MCU, semiconductor manufacturing is highly polluting), I would question the “greenness” of Tesla in comparison to other makes.

That said, overall it feels unproductive to focus only on a car when thinking about the total impact of oneself on the environment. Someone who drives a brand new Tesla, lives in a single family home, and eats steaks every night I would guess has a larger impact than someone who drives a used Corolla, lives in an apartment, and eats lentils every night. Personal transportation matters, but it’s a part of a larger whole that’s about consuming much less.
So should I pull out on all my stocks and stuff everything into bonds then?
Oh, those. Yeah, those are annoying. There aren't that many of them, though.
Apple can’t magically tell that there’s no malware in an app you upload. There is no automated scan which can detect all security vulnerabilities or back doors in code. And we’re talking about electron plus hundreds to thousands of npm modules - which contain who knows what.

If you pull in some bad modules, directly or transitively, and as a result your app steals my data or worse, that’s on you for shipping malicious code to my computer. There is no one else who can be responsible for that. Not Apple. Not the user. You.
Counterpoint, IGA near me (rural area) is dark, dingy, looks like death worn over, over priced, and bad quality on everything.
Maybe I'm not understanding what you're defining as the "aggravating factor," but I'm interpreting it to mean that FB, IG, WA are seen as separate entities while Google properties like Docs, Keep, Calendar, etc. are seen as products under a Google umbrella.

If so, I don't think it's a distinction with a difference, as antitrust attention is going to focus on the umbrella, regardless of its name. I'd say your FB example has already been dealt with in the horizontal instance of Internet Explorer, while the Google collective is more vertical. Different flavors of umbrella, but that's what gets dismantled.

IANAEconomist, but hopefully my point comes through.
> OTOH ranges usually get compiled to faster and more efficient code. Smaller too.

than raw loops ? do you have an example ?
Network management is allowed under most definitions of “net neutrality.” But if someone is consuming all the bandwidth, maybe you should upgrade your equipment? Maybe don’t sit, whine, and ask for more subsidies that you won’t use for that purpose.

Most people aren’t upset about network management throttling, but about the deceptive advertising that says you get unlimited, but in fine print: “limited to EDGE speeds (128Kb/s) after 2 GB”
> where the workers have neither demand leverage nor an union

It barely has anything to do with Google's work condition however, employees are demanding to have a say in who Google management choses to work with or not, that's a very different concern than negotiating severance, or worktime. Maybe that's how americans think about union in USA, that's definitely not what worker unions are about in Europe for instance.
Recently I bought a large format printer for a project (a HP Designjet 488ca 36") and I was amazed when I found out that the drivers, dated from 1997, were still working on Windows 10. All you needed was to deactivate the signature verification, that didn't existed at the time. It feel crazy to me that my Windows 10 tablet can still print over a parallel port using a simple adapter.
Aviation industry to counter flight shaming movement
Thank you this is great feedback - I've had trouble finding proofreaders IRL so this really helpful.
For the graph feature check out Trilium Notes:

- https://github.com/zadam/trilium/wiki/Link-map

- https://github.com/zadam/trilium/wiki/Relation-map

The links between notes are stored as rows in a relational database (SQLite) so if you're not afraid of a little bit of scripting, you can easily query by e.g. number of edges if you want ...
Yeah, don't claim that the data is unlimited then, problem solved. Either you say that you offer unlimited data, and you allow unlimited data, or you don't say or allow it.

I seem to recall that something similar as this case happened in Sweden (10+ years ago?), where a operator was forced to not claim "unlimited data" unless it truly is unlimited and without throttling, but I can't find any references to this right now...
2:1 is correct. Or 1:1, depending on your definition of "normal people". The relevant rule is called Reg T and it's not a limit set by the SEC, but by the Federal Reserve.
Here is a list of some real-world examples of bugs that Mozilla had to fix when upgrading from Firefox from C++11 to C++14 to C++17 (still in progress). Many of these are compiler issues from upgrading to clang or gcc versions recent enough to support the new C++ versions, not C++ language changes.

https://bugzilla.mozilla.org/showdependencytree.cgi?id=15606...
Show HN: AndRemote – Job board(VC Startups). My first side project
CICD/DevOps Meetup – Yahoo, Sunnyvale, 11/7 – 3 Great Talks
I think this could make a great Tinder feature to suggest chat lines.
for the same reason that std::string is std::basic_string<char>
I think his character and intentions have become such a trope that it has made it near impossible to gauge the good or bad faith of the person who starts discussing them. In a sense his name has now transcended rational discussion and become a symbol. Probably there needs to be an internet "law" for this, like Poe's Law or Godwin's law...You just cannot know if the person who names him wants a sane discussion or to just to bang that massive drum one more time.
In my experience, this is the norm in the ML scene. Giant globs of unreadable and in no way understandable code -- unless of course you already understand everything.

I think this is because the "product" so to speak is often the papers themselves, not the code, but I'm not sure.
I don't see how that follows? A thief might be willing to break a conventional door lock if it gains them access to high-value, fenceable possessions.

In this hypothetical, the hostile actor isn't interested in the smart speaker itself, they're interested in what the smart speaker can do.
Since people tested on one JVM version and ran production in another. Finding that gives unpredictables results people moved to linking the versions together. And then the next natural step is distributing the runtime and the app together.

Note this was not possible in the past as the java license prohibited redistribution.
The biggest takeaway from this article is the advice that you should not adhere to the 90-90-90 sitting posture and instead raise your seat so that your knees are below your hips. I've personally just tried this and it feels much more comfortable.

I theorize that the 90-90-90 posture encourages bad habits where your spine shifts backwards from the center so it is no longer supporting the upper parts of your body well. By changing my sitting posture to the author's recommendation, it feels easier for my spine to stay in the center and support my upper body better.
> There's so much Google is doing to directly damage the technology ecosystem.

The best way to counter that is to work on alternatives.

I've always wondered why search couldn't be like DNS or server-side caches; every server could index all the content that passes through it, and clients would query all nearby servers.

Other HNers have previously said that indexing is the easy part; it's providing relevant results and reducing spam that's hard. Well, when the indexing is freely available to everyone, maybe we could use on-device client apps to navigate that index, each with our own preferences.
Can you tell more about this? What's the law and what does it allow? Has it been in effect for a long time?

I wonder if any small companies have moved to Germany or selected Germany specifically for this reason.
I agree, a lot of the code could be improved. But some of what you mentioned is fairly standard. Like "Gaussian Error Linear Units being GELU, w/b for weights/biases, etc...
Firefox add in please.
What? The german WV autoworkers union has just demanded that they refuse to build a factory in Turkey until their aggression stops.
Use the uMatrix plugin with Firefox.
I'm not sure I understand the problem, but perhaps 'jughandles' as used in New Jersey are the solution?
ServiceTalk
Azure Arc – Azure services now run anywhere with new hybrid capabilities
‘Game-Changer’ Warrant Let Detective Search Genetic Database
Ask HN: How is your mental health?
How and how well do you keep track of your mental health, particularly for those with a history of mental health issues, and those with a family history of mental issues.

As for me I like to think that I try really hard to monitor my mental health, I suffer from anxiety disorder and my father and mother both had mental health issues at one point in their life, which makes me constantly fear for my mental health and hence my monitoring of my mental state of mind like a hulk.
My professional observation (as ml researcher at big tech):

These companies hire a lot of engineers straight out of undergrad/master's degrees. The interviews test leetcode knowledge, and today lots of degrees are heavy on Python-scripted ML homework.

The result is companies with billion dollar funding and world-changing goals having a lot of their code look like complete spaghetti.

And this is the engineers who are meant to clean up research scientist code. Scientists generally don't feel like it's their responsibility to write strong code.

Systems-side teams/orgs have better code, but essentially as soon as you enter the 'ml engineer/research engineer/research scientist' layer, it's doomed.
> News alert: choosing not to do evil is not always compatible with maximizing profit.

I am so sick and tired of this attitude. In what world is working with the military / defense contractors evil? Do people really believe that the military is inherently evil? Is there literally no regard to history, or the fact that not having a military is basically tantamount to allowing other countries to do whatever they want with you?
I'm not critiquing dense urban or rural living. However, when 70% of the people who live rural pass a couple grocery stores on their way home, the ones who don't commute are going to suffer.

Roads should be designed to travel between communities, not bypass communities.
GPT-2 Neural Network Poetry
Head Mirror
I started with TMo for ethical reasons about 10 years ago, but their SFBay coverage has been really spotty for me in general the whole time. No bars in office buildings, in the suburbs, on underground public transportation where other people appear to have active connections...just lots of inconvenient holes.
Vespa Updates-Nearest Neighbor and Tensor Ranking, Datadog Monitoring Support, +
Why Is Routine One of the Best Gifts You Can Give Yourself and How to Make It?
C++11 was the major version bump. It changed how you're supposed to write C++. C++14 & 17 are just minor fixes & improvements. So there's really no reason to not start with at least C++17.
An Elementary Derivation of Kalman Filtering Using Two Simple Statistics Ideas
Huh? He gained billions of dollars (pounds, Deutschmarks, whatever), the UK government lost billions. That clearly hurt their economy.

Letting the currency float was better in the long term, and his actions made that happen, but I'd like to think there were other ways. And I doubt helping the UK was his goal; I can think of billions of other more likely reasons. Many people would say he stole this money from the government. It was legal, clever, and successful. He did some good things with some of the money afterward. Still, I'm not going to like him for it. (That sums up my feelings on much of the finance industry, in fact.)
When Might Apple Release an Arm-Based Mac?
Do you struggle with making good or breaking bad habits?
I just published "Why is Routine One of the Best Gifts You Can Give Yourself and How to Make It?"
This is my first ever written story on the web. I am very thrilled to share it with you.
This is the story from my experience, and I am sharing things I know are working for me to help you.
I am eager to hear from you.
The most obvious answer is most of the new alternatives are open source and “free” while Splunk isn’t.
Sure, but they are much larger cars, 3 rows of seats available, etc. What cars are you comparing them to?
Because criticizing him is anti-semitism or something.
Yes. The only remaining question is when.
I don't care about using less RAM, why should I? My applications run in our private cloud and sometimes in public clouds. We optimise the parts that need optimising but it's often cheaper to scale the environment, add more SOLR servers etc than it is to jump in to the opcode and figure out the best way to get the JVM to JIT something.
Hector Marcan is a wizard. The “hash based” differential compilation technique is inspirational.
I have a child and it’s this kind of stuff that makes me wonder if we shouldn’t move out of the US. I worry about the future of this county.
I wasn’t talking exclusively about products at all. But even then, I don’t see a moral high ground in pushing negative hyperbole as a response to a perceived excess of positive hyperbole. Both seem equally fallacious to me.
FTA: "There are more than $27 billion of outstanding bonds backed by non-qualified mortgages now, a small fraction of the approximately $10 trillion mortgage-bond market. In 2007, there were around $1.8 trillion of bonds backed by loans to non-prime borrowers."

I'm gonna need to see a lot more than a tiny fraction of investors / loan makers dealing with non-QM bonds before I'd say that 2007-era silliness has come back.

This looks a lot more like some banks filling in the gaps in the QM market than anything else.
Pocket change. Cost of doing business.

They made way more money by misleading customers and will continue to do so with penalties that small.
They just raised 50 million dollars a week ago according to crunchbase [0] and I doubt they have blown through that already.

[0]: https://www.crunchbase.com/funding_round/robinhood-series-e-...
I'm surprised that the FTC didn't push harder for an admission or some statement by AT&T to make this look like a win for the gov't. AT&T's statement:

> “None of these allegations were ever proved in court. We were fully prepared to defend ourselves, but decided settling was in the best interests of consumers,” said Jim Greer, a spokesman for AT&T.
Could these functions just be implementations of math with matching variable names?
300k in 3-5 years? You can get that much in RSUs from a publicly traded company, and you can sell those for cash every quarter and buy a house before the 4 years are up.

For me to work for a startup, the upside scenario needs to be an 7 figure payoff to be worth giving up the sure thing of bigco stock. And even then, the utility function from money is logarithmic so I’d still go with bigco.
It's an interesting turnaround. Once upon a time all the thinking was that you should pile as much into shared DLLs and common runtimes as you can, because those things will almost certainly be kept in the cache and will be much faster to launch / lower overhead.

Now not only is it becoming "best practice" to bundle your whole runtime with your app, people are bundling the whole operating system via Docker.

I'm curious if people have compared actually using a single JVM that is kept hot in OS cache vs separate minimal packaging for every app. It might favor single packaging if you only run 1 java app, but if you ran 10 different ones the benefits of shared code might win.
Interesting ... although they do not have a CLI, can you call functions with 'curl', like:

curl api.privacy.com CID:blahblah token:blahblah ... action-action-blah-blah ?

I don't actually use a Twilio CLI - I call functions with curl from my own scripts ...
After OpenJDK 8 the separate JRE was deprecated.

The recommendation now is for app developers to include their own JRE with the app; just like how each electron app includes its own copy of chromium.
https://www.bbc.com/news/education-50302762
Is there anything like Privacy.com, but for Canadians? I really like the idea of being able to have per-service burner cards
SJW is a derogatory expression, like "TERF", social justice warriors don't call themselves social justice warriors. I would call social justice warfare a set of sophistic mindsets and tactics in order to push an intersectional narrative accross every community. "Codes of Conducts" for instance are an euphemism for "political and thought control" in a community. It doesn't make a community better, it just forces it to accept an intersectional narrative and eliminate political dissidence, through ideological purity.

The best example is the atheist community that was about atheism. Some people "hijacked" that community and pushed for "atheism +", where now it was no longer enough to be atheist, you had to also be an intersectional feminist, pro-LGBT+,anti-racist, anti-islamophobia... not that it is a bad thing but it has absolutely nothing to do with atheism. So "atheism +" gatherings ended up talking about anything but atheism itself, since it had now to talk about representation of women, LGBT+, minorities in conferences.

edit:
Why don't you just buy VOO on vanguard considering there is no commission fee on vanguard when buy vanguard ETFs?
That article about commenting on a trademarked entity, not about businesses doing similar business using a trademarked word.

Of course, backcountry is a special case because it was already generic before it was incorrectly trademarked.
> There’s a third violation, refusing a blood or breathalyzer test, that results in immediate suspension of the license, but it’s not a felony.

In some states, it is an additional felony.
Robinhood has a glitch that’s letting users borrow far more than they should
Once the local competition got pushed out, did Walmart raise prices or did they keep them low? Because if they kept low prices, I'm not sure I see the problem here.