skysight-inc/HackerNews huggingface dataset:
The iPod classics are also wonderful single purpose devices that last a long time, and are quite upgradable. The software is much simpler than an iOS device, and can be changed to the open source Rockbox. You can replace nearly all the older components with cheap Chinese parts eg shiny new outer case, higher capacity battery. Then add a new circuit board so the iPod can use high capacity micro SD cards instead of the original hard drive. The result is all the advantages of the original iPod, with more storage capacity and insanely good battery life.
> The SpaceX Merlin engine uses the same basic RP-1/LOX cycle as the Saturn V’s first stage engine, which is more than half a century old now.

If I build an electric car with the same rubber technology as cars have used for a century, this would not mean I hadn't pushed the limits of technology.

> Rocketdyne’s engine produced about 7-8 times as much thrust (which is why SpaceX needs 27 engines on three boosters for a Falcon 9 Heavy, versus 5 for a Saturn V.)

"Thrust per engine" is a bad metric since, for larger payloads, it can be better to add more engines than make them bigger, and that metric immediately disqualifies that strategy. (For instance, more full independent engines means more redundancy. Which strategy is better is going to depend on the details.) We wouldn't say that 18-wheelers are worse technology than 4-wheeled earth movers because the latter have more weight per wheel. Ultimately, the thing we care about is most mass to highest orbit at lowest risk. But if you want to concentrate on raw engine performance, you probably should look at metrics like ISP (which SpaceX is indeed not pushing the limits).

> A more accurate summary is SpaceX is retreading well-worm ground that was trod before many of us reading this article were born, bringing modern materials and manufacturing capabilities to bear improving the same basic designs. That’s cool. But that’s not pushing the boundaries of space flight technology.

Surely re-useable first stages is the biggest advance by far in spaceflight technology in decades?

It sounds like by "space flight technology" you just mean engines, but chemical rockets are within about a factor of 2 of the maximum efficiency allowed by the laws of physics. So within that paradigm, you're just not going to get revolutionary (multiple-orders-of-magnitude) improvements in the things we care about (mass to orbit) by improving engines as opposed to things like re-usability. So I think by your definition, the only thing that would be really be an improvement would be nuclear rockets, or something else even more extreme.
The C++ community started a comparison of various buildsystem a while ago: https://docs.google.com/document/d/1y5ZD8ETyGtxCmtT9dIMDTnWw...
50+ years in service for the M16 though.
Death by gentrification: the killing that shamed San Francisco (2016)
Mmmm if you don’t work and make money in the US you’ll be in a bad way, and since the majority of employers have the conditions described, and most job seekers have little negotiating leverage on these issues, the choice to sign the employment contract is voluntary, yes, but so much behind the circumstances and conditions of that signing is beyond the power of an individual to effect or influence through their choices.

Which is why the saying “strength in numbers” is a saying.
Nice job!
I still use Spikenow.com - the popular conversational Email that became the official alternative to Inbox by Google.
Available on all devices...
Most of the economy in the so called "developed countries" is nowadays a zero-sum game between winners and losers. Seen from a macro perspective, it resembles a multi-agent system where independent agents compete to provide inessential products and services in exchange for being able to afford basic necessities like housing, food and child care. The finite resource that such companies are fighting for is people's attention and time. Some win, others lose, but the status quo is that we are sweating from work in order to live in a world with smart refrigerators, automatic garage doors and pointless baby toys. And if we had more spare time, why would we even think of that.

What we really need is a change in paradigm because market forces will mostly solve only small "consumer" problems and cannot reorganise our society in a more efficient way.
This page has a “Using your Yubikey” section: https://www.yubico.com/product/security-key-by-yubico/#secur...

I think it’s pretty impossible to expect people to look at these keys and think “ah yes, this is a Yubico Security Key, not a Yubikey”, given they look like a painted yubikey, are sold by the same company, have some feature overlap, and the docs are commingled with yubikey docs.
I'm curious, could you link the thread you're referring to?
Climate Change: The Facts – Sir David Attenborough (video)
Resonant antennas are only one class of antennas, with the other being traveling wave antennas. A log periodic looks similar to a Yagi, but it’s not. Same with a biconical and dipole.

It’s an easy day when I have dimensions on the order of a wavelength. Usually it’s 1/10 or less, and shoved up against metal.
That’s just not correct.

In the original form of the experiment (and several subsequent replications), the “teacher” was under the impression everything was real and wasn’t aware the “learner” (the person pretending to get shocked) was an actor.

Today, you’d never get an ethics board to approve the experiment in this form, as several former “teachers” were distraught, after being told the true nature of the experiment, because they naturally assumed they’d never be capable of such terrible acts.

There is no evidence to support the view that the “teachers” who administered dangerous shocks were somehow clued into the fact that it was an actor. That would have made the entire experiment worthless, as “Will people pretend to do evil things while role playing?” isn’t an interesting question because thats well understood to be true. Milgram set out specifically to see if every-day people would commit acts that go against their personal conscience if directed to do so by authority.
UC Browser flaw could allow Hackers to remotely hijack your Android Phone
Isn’t SpaceX private?
Merlin is also the highest thrust-to-weight engine ever, by a large margin. F-1 could produce a lot of thrust because it was huge, not because it was efficient.

But that's stuff they've already accomplished. You're ignoring what they have in development. The Raptor engine is among the most advanced engines ever made, pushing combustion/metallurgy technology literally to the limits, certainly not well-worn ground. Not to mention Starship/Super Heavy, which is pushing reusability further.

They might not accomplish everything they set out to do, but that's why it's "pushing" rather than "pushed".
I believe the universal approximation theorem is for a single hidden layer. When more layers are added arbitrary functions can be approximated.

From section 4.6.2 of Tom Mitchell's Machine Learning book:
"Arbitrary functions. Any function can be approximated to arbitrary accuracy by a network with three layers of units (Cybenko 1988)."
If you're comparing STK to Mario Kart it's obviously going to lose.

But there are millions of kart racers out there, and many of them are pretty poor. STK is better than most of them.
If the participants thought they were in a real-word situation -- and apparently many did -- then their responses (which were varied) do raise questions about real-world behavior.
It is your choice, and I fully support you having that choice. I speak of doing so at scale. You alone aren’t going to cause industry wide wage depression.
I had Stuzman and Theile in antenna class, but Balanis for grad level EM.
Land reforms and redistribution never work. It just disrupts the current social order, pisses off people from which the land has been taken, pisses off people who didn't get as much as their neighbor and eventually, roughly within 50 years, leads to similar social structure as before the reform. Only with different social class becoming the owners. The old aristocracy gets displaced by new oligarchic aristocracy. This has happened all over Eastern Europe.

The actual solution is capturing of the rent as the land value increases. The increase on land value is due to society contributing, but the beneficiary is the landlord sitting on it. Tax the consumer, not the producer of the value. Tax land, not labor and business.

The aristocratic power law society has to be broken in order to fix the system. Bolsheviks didn't understand this. Or they did and they organized the coup just to become the new bosses.

Without this understanding our society will still be very primitive and suffer from revolutions and aristocracy cycles. At least in ancient times they understood basic ethics in terms of ethics of ownership and how destructive debt was on a society. It seems like today we are blessed with all these new technologies but live more and more in some medieval dark age dystopia.
> Almost always a monolithic with some SOA and clear domain boundaries is going to work better for static/slow growth teams.

If it has “some SOA and clear domain boundaries” its not a monolith, even if it isn't decomposed so far as to be microservices.

“Right-sized services” isn't a catchy meme-spreading label, but it's probably the synthesis pointed to by microservices as the antithesis to monoliths.
Landing an orbiter like an airliner is not what SpaceX is doing.
Show HN: Create self-guided walking tours of your city
> Parachute landing a crew pod into the ocean is something we first did the year my dad was born

You're getting confused between the tiny pod that people sit in - which basically does nothing, and the actual rocket, with all the flames and gasses and actually make the pod go somewhere.

Nobody has ever landed and reused the rocket before SpaceX

> landed an entire orbiter like an airliner three years before I was born

Yes, a thing with wings landed using lift from the wings. It did not use rockets for propulsive landing like SpaceX have designed.
Hello HN! For the past few months I've been working on this tool for creating and sharing neighborhood walking experiences.

Usually, when I have a friend in a city I'm visiting and ask them for suggestions, I end up with a list of 20+ good places, but planning visits to them feels like a chore. So I built this app to solve this problem---you create a route (which amounts to a long-ish plan for the morning, afternoon, etc.), grab a link, and send it to someone who's visiting.

Of course, it might be useful in other cases too. Some of my friends have found good use of it as a lightweight travel planning tool.

Eager to hear what you all think!
I mean, I too have trouble having conversations in noisy places, and my ears are all natural, just old!
> Really? Atrocities against civilians in war were common even then. No need to look further than e.g. the colonies.

I think the point was that scale of it was quite different in WW2. In WW2 the majority of casualties were civilians, which was new compared to previous conflicts.
Precisely varied density in building materials feels like it would not have been available to ancient builders.
> have to leave 75% of proven fossil reserves in the ground.

To nitpick, I think you mean burn them. Oil into plastics has minimal emissions.
Yeah but with quite a few revisions to get it to where it is now.

To be fair, the original design was ruined by committees of bureaucrats and "rules because rules."

I wouldn't take an original M16. But I would take an original M2 or M1911.
It's true both ways: for the German POWs who were sent to Russia, almost none of them made it back alive.
It's not the 'rich'. It is the rentiers.

Rich can be rich because of great societal or technological improvements as well as somebody stealing legally or illegally from others.

Rentiers can be both very rich or not so much, but always at the expense of other people.
But isn’t land ownership and renting free markets? If there is profit to be made by renting out land, investors should look to buy land to rent out, since both the land market and pool of renters are limited this should naturally drive up prices of land while driving down rents. And as such you should move towards buying land to rent out becoming a very low margin business and renters end up paying only marginally more than they would if they bought the land themselves.

That’s in theory though, so what’s keeping this from happening in practice?
Yay! Game boy for life!
Just leaving this here:
Earn crypto by doing tasks
https://coincircle.com/l/50VVxbObg3
There was a window of time (roughly from the eighties until about 2016) when "socialist" wouldn't be used because it was perceived as outdated, too linked with the Cold War and Red Scare... so it would be painted as "entitlement" or "lack of personal responsibility": if you wanted to read, you should have bought your own damn books.

(I think the discourse is being revamped in light of the rise of democratic socialism in US politics)
Yeah I was trying to figure out what to do with that one. In the end I “corrected” it as suggested but could have gone either way depending whether Manning is a singular company or a plural collection of people.
Without a strong profit motive would companies still have much incentive to pour 100s of millions of dollars into R&D for new drugs and treatments though? How much progress in healthcare is driven by the fact there’s a lot of money to be made, and how much does the US’s high prices basically subsidize cheaper healthcare for the rest of the world?
Invitation to a Research Project on Entrepreneurship and Neurological Diversity
As in the previous post, I invited those who are running a business or trying to start a business to take part in a new exciting research project linking insights in psychology and neuroscience to entrepreneurship. To date, over 200 entrepreneurs have already taken the survey! The project is called Entrepreneurship and Neurological Diversity. It focuses on certain psychological traits, self-care, and entrepreneurial outcomes.

As a participant, you can receive your own personal profile, as well as a written summary of the findings so that you can benchmark yourself against other entrepreneurs. Here is the link to the survey: https://syracuseuniversity.qualtrics.com/jfe/form/SV_6YDj3fqu4FtOn9r

If you have any questions or concerns about the research, please don’t hesitate to contact me. My email address is jwiklund@syr.edu.

Thank you in advance for your participation.
His wife said this morning on Twitter [1]:

>>> This is Helen wife of @joeerl It’s fantastic to read all these comments. Joe died from an infection which his lungs couldn’t cope with due to a quite recent diagnosis of pulmonary fibrosis. Incurable and rather unusual. Donate to lung research!

[1] https://twitter.com/mrsjoeerl/status/1119941783381774338
That's a fun poem for making your Chinese-speaking friends laugh. For English speakers, a similar kind of tongue-twister is The Chaos (Dearest Creature in Creation):

https://www.hep.wisc.edu/~jnb/charivarius.html

I'm (still) trying to learn Chinese, using my own web app to split words, romanise them, and translate them separately.

https://pingtype.github.io

The hardest challenge for Chinese NLP is word spacing. I'm amazed that they still haven't welcomed the space character. English without spaces could be really confusing! Consider what happened with URLs: "thepenismightierthanthesword", "expertsexchange", "psychotherapist". That's amusing for single words, but I wonder if we could go longer.

If there's any poets here, I'd like to hear your best examples of English sentences that make sense, but with a different meaning, if spaces were added in different places.
Hmmm, HN is limiting our thread depth, so can you please email me at my email in my profile? I'd like to continue the conversation and learn more about your point of view.
I did a coffee kiosk once. It went well, but required a large amount of energy and focus.

We did a little twist on the business model. Starbucks sells nice places to sit down. We sold drugs. The model, from logo design to promotions, was designed to create a habit loop where people would get their morning coffee from us.

It was so profitable that I seriously considered making it my full time career, expanding cafes all over the country. The only thing that changed my mind was 1) the startup boom 2) dealing with minimum wage workers is extremely depressing. The tech industry has its abundance, whereas with food and drinks, it was clear that income was limited and had to be managed carefully.
You are looking for the keyword "Endphaseverbrechen". Particularly crass: Willi Herold, the Butcher of Emsland.
nice deflection
If N64 games are still worth playing, it's surely equally true that there's really nothing about the styling of the original iPhone that makes it an eyesore. It's just obsolete.
Ignoring Mario Kart, many of the kart racing games are just lousy. There's a lot of licensed shovelware. EG https://en.wikipedia.org/wiki/Shrek_Smash_n%27_Crash_Racing
> If I build an electric car with the same rubber technology as cars have used for a century, this would not mean I hadn't pushed the limits of technology.

That's a misleading comparison, because we're not talking about some ancillary aspect of the design (like rubber tires). This is more like designing a car with the same basic engine technology as a 1969 Impala, except you're using an aluminium engine block and modern crumple zones.

> "Thrust per engine" is a bad metric since, for larger payloads, it can be better to add more engines than make them bigger.

More engines can also mean more chances for failure. (You can make the design resistant to engine-out conditions, but some engine-out conditions are less recoverable than others.) Regardless, the Falcon 9 Heavy also has substantially lower maximum thrust than the Saturn V.

> Surely re-useable first stages is the biggest advance is spaceflight technology in decades? It sounds like by "space flight technology" you just mean engines, but chemical rockets are within about a factor of 2 of the maximum efficiency allowed by the laws of physics. So within that paradigm, you're just not going to get revolutionary (multiple-orders-of-magnitude) improvements in the things we care about (mass to orbit) by improving engines as opposed to things like re-usability. So I think by your definition, the only thing that would be really be an improvement would be nuclear rockets, or something else even more extreme.

I don't even really disagree with that point. Unless there is some groundbreaking advance in rocket engines, you're not going to be "pushing the boundaries of spaceflight technology." It's just like how we don't say Intel is "pushing the boundaries of CPU technology" every time they widen the vector units on the same basic Core architecture they've been using for almost two decades. It's a mature field where revolutionary improvements aren't possible with foreseeable technology. But that doesn't mean you get to relabel incremental improvements as revolutionary.
For anybody interested in learning a bit of Ainu people in a fun way, I highly recommend the anime Golden Kamuy (https://en.wikipedia.org/wiki/Golden_Kamuy)
This choice is an illusion for anyone not in the higher echelons of society and your comment is the result of confirmation bias. Most people need to work and will take what is available to them and suffer the reality of a lopsided contract at will and vast underpayment. Most people can't just quit if they don't like their job - they will lose their only source of meager income, healthcare, and possibly their home.
Insurance companies should abhor any kind of state competition, regardless of the case for it, its in their interest. But being an interested party does not make you evil.

Government also has an interest, in fact a huge interest. If healthcare were socialized entirely, dollar-per-dollar it would increase the federal government's size by ~ 10% of GDP. Currently its 21%! It would mean 50% bigger government!!

And that means HUGE cash, and HUGE political boons. Sanders could become president by promising people a healthcare service he does not pay for or he is not responsible for its failure. And the government now will have some omnipotent ways to levvy taxes and then short-change constitutents by cutting health spending or quality.

The government is also an interested party, and it's stands to gain more power than ever with such a ploy.

I also urge not to believe that the state "does thing for the people" because it either fails to do so or it just is plain false. Please look at the real results of public education: it has terrible results even though "its in the interest of the state to provide quality education".
> Think of the Nazis as a gang of uneducated mobsters

This is such a ridiculous claim to make. There is absolutely no correlation between Evil and Stupidity. And pretty much every fact of that time disagrees with the theory that Germany was led by idiots and uneducated people. On the contrary, you should be all the more afraid when smart people turn evil.
I added an SSD over half a decade ago, that's why I was absolutely fine with it's performance (at least after moving to linux and a minimal WM, OS X died for me long ago from bloat)... it's only the human interfaces that started to physically fail.

I know you can pick up spare parts for these but the problem is that they are all as old (they are commonly advertised as new on ebay, but they are not), they are used parts, and it is quite a lot of work to get all the guts out of the top case, only to replace it with a slightly less used components.

The best middle ground I could think of is to selectively replace rubber domes as they fail by cutting out the bits of silicone and gluing in new ones... only needs to pop of one key at a time.
I think the sequence of events you're proposing is implausible, on the order of likelihood of a zombie apocalypse or the apes rising up to overthrow mankind.

"If we decide that billionaires represent a policy failure that has allowed a few to concentrate wealth and power and society collectively wrests some of that back from those with such a disproportionate power and wealth, then that means eventually 'they' will come after my inconsequentially meager possessions."

I don't see it.
The flaw here is talking about the 'rich'. You can divide rich into absentee landlords collecting hight rents and stifling the economy down and the actual rich who became so through entrepreneurship or other positive impact activities.
U.S. billionaires worry about the survival of the system that made them rich
Captured DNS Requests from Huawei P30 Pro
> Merlin is also the highest thrust-to-weight engine ever, by a large margin. F-1 could produce a lot of thrust because it was huge, not because it was efficient.

It's about twice the thrust-to-weight ratio of an F-1, which was designed in 1969. With all the advances in materials science since 1969 (composites, etc.), that tells you a lot about the glacial pace of advancement in the field. It's also not clear to me why that even matters--a Saturn V has about 90,000 pounds of engines; a Falcon 9 Heavy has about 27,000 pounds. Both need millions of pounds of fuel. (As to your comment about "pushing" versus "pushed"--that interpretation of OP's comment doesn't match the fact that he's talking about a setback involving SpaceX's current generation of vehicles.)
I’d actually love to get into it. Not even a CS major.

Time hasn’t been on my side lately but I always peer in on these threads to try and improve the scope of my understanding even a little.