skysight-inc/HackerNews huggingface dataset:
This site is pretty much on the same level as sites advertising perpetual motion machines. I don't need every little detail to observe that it's bullshit.

Unless you confine a parcel of air in all directions, it will match the pressure of the surrounding air. Consider an arbitrary cubic meter of air at 15°C at sea level at the base of the tube. Now raise it 1,000m inside the tube. That air now occupies roughly 1.12 cubic meters and is at a temperature of roughly 5°C, the same as if it had risen 1,000m outside the tube.

The tube will work sometimes, but only when the atmosphere is unstable. Since the chimney is 5km tall, that means thunderstorm conditions.

You can only extract energy from a tube like this if there's some energy potential between the two ends. The atmosphere is constantly erasing differences in energy potential, so large-scale differences are ephemeral.
The oldest timber-frame that I have seen was in France at the Hotel-Dieu in Tonnerre, Burgundy. With 90m meters long, it's a sight: https://hoteldieudetonnerre.jimdo.com/
> paying for it with increased compile time, code bloat, slower code.

Auto-properties in C# are one line of code, same as fields, and the getter/setter methods should always be inlined which turn them into field accesses anyway. So I'm not sure how that would affect compile times or lead to slower code in anything but some pathological use case. Or DEBUG, but at that point all performance bets are off.

(Technically Microsoft can get worse performance on properties vs. fields when using NGen - that's why they have TargetedPatchingOptOutAttribute - but that doesn't apply to regular, non-Framework assemblies.)

As for code bloat `public int SomeValue { get; private set; } = 6;` encapsulates a publically read-only/privately mutable property with a default value quite concisely...
> If the answer is they would, why is everyone ignoring this issue?

Nobody is ignoring it. It's just if you haven't moved up the tech/management/etc ladder by your late 30s/40s, there just isn't a place for you in silicon valley/tech startup scene.

I started at a startup when I was 20. All the devs were in their 20s. Our founder was 29. During milestone/release/go-live times, we'd work 20 hours a day and sleep at our desks and wash in the 1 toilet bathroom the entire week or two prior to get our job ( deliverable ) done. Now that I'm older, that's something I just physically can't do. I just don't have the energy or stamina for it. Also, family responsibilities means I can't do it.

The startup scene is such a raw, all-or-nothing, winner-take-all scene that it'll always be a young man's game.

Also, younger people are viewed as more innovative, more immersed in new tech and quicker to learn. As much as experienced is touted, it's not worth much in the startup scene. Certainly it helps if you are the founder/team lead, but for the regular devs, it just makes sense to bring in the cheaper, hungrier, "quicker", eager college grads or young devs.

Put yourself in their position. Imagine you just founded a startup. Would you really be willing to hire overpaid 40 year olds who have to be home by 5 or 6 PM? Also, would you as a 40 year old be comfortable in a dev team with a bunch of 20 year olds?

This is why as devs grow older, they transition to more established corporations. It's why VCs love to fund younger founders. That's where the innovation/energy/risk-appetite is. 40 year olds have kids college funds to think of, their retirement funds, healthcare, etc to worry about. And as you grow older you get more conservative and set in your ways.

Also, as younger people/devs continue to create winners like google, facebook, snapchat, youtube, reddit, microsoft, etc, that's where the money will go.

Silicon Vally and the VC community isn't about charity or societal good, it's about making money.
Connecting the dots, if Airpods are successful in adoption, this could answer the awkward "You'd look silly holding a watch up to your ear" argument, same with "It's inconvenient to plug a 3.5mm plug into a watch". Maybe this is one motivating factor in Apple's decision to remove it the 3.5mm port from the iPhone?
For most people driven to addiction, having something that guarantees you will feel that "everything was ok" is exactly the draw, I think. It gets worse as you become more and more addicted and have more and more to hide from as you let other parts of your life you cared about continue to slide.
I'm currently a fourth year medical student, and based on my experience you don't need anything from the med school in the first two years. The goal of the first two years of med school is to perform well on the USMLE Step 1 exam. My classmates and I found that you can do extremely well on this exam by using 3rd party resources exclusively. The consensus across the community of med students is that UWorld (a question bank), First Aid (text book full of relevant Step 1 facts), and Pathoma (Khan Academy style video series made by a pathologist from the University of Chicago) are all you need to succeed. Sure, the first two years of med school could lay a solid foundation to help you study for Step 1 at the end, but that foundation isn't absolutely necessary.

I go to a medical school that heavily emphasizes small group based learning. We have lectures, but they are optional and poorly attended. Most students only attend the small group sessions 3 times per week for the first two years of med school (largely because those sessions are required). At first, the small group sessions seemed helpful since there's more of a chance to have a discussion about difficult concepts and topics. After a while, however, you get the feeling that the small groups are just the blind leading the blind. Often these groups are led by fourth year medical students (such as myself) that are not nearly experienced enough to provide adequate guidance to first and second year medical students. Usually, the main takeaway students get from these sessions is that they should read First Aid, do their question bank, and watch Pathoma. All of which every med student knows to do anyway.
I think I'm missing something here. How is the temperature differential between a fireplace and the top of that chimney different than the temperature differential between the ground and the top of the super chimney?
I think they're still on Sprint, but I'm only ~70% on that.
I remember 10 years ago Nuance used legal threats to eliminate competition in this field, to the extent that greatly discouraged any startup speech recognition companies.

Google was able to get around it, just because they became heavier..

Did this significantly change since then?
Sounds like survivor bias. It was the same thing that made the book "Good to great" complete nonsense!
Yeah it's called being a grad student pursuing masters in archaeology.
The fireplace is dumping BTUs of energy into the air above it, the ground doesn't do the same.
And your lack of justification is ascientific.
Rich Homie Quan couldn't even flex like this tube could. Making really tall stuff is hard.
> I know enough about Shkreli to consider him an awful, awful person.

That isn't what this trial is about. Just because you don't like someone because of one thing, doesn't mean they should be getting a harsh sentence for a separate crime (which apparently had no victims).

Perhaps instead of vilifying characters who break the not at all free market pharmaceutical industry, and name-calling people who espouse ideologies that conflict with your pre-existing beliefs, you should instead consider why a single guy was able to stir up so much trouble in your heavily regulated medical industry. Was it because there wasn't enough government to protect people? Or was it more likely due to an extremely high barrier to entry to the pharmaceutical industry imposed by the FDA? (And in other cases, excessive IP protections play a significant role).

I'll leave it as an exercise.
WiFi improvement tips
I usually overcome such mechanisms on Chrome by holding down the back arrow until the list of past pages comes up, then going back to the page just before the last one.
Looks like they're using walk and win for the gui.

https://github.com/kjk/walk
https://github.com/kjk/win
Strictly from a selfish perspective, it's in your best interest to have rich friends and family, rather than poor friends and family... even if your own personal economic status is the same in both circumstances.
Well just sell Ebooks.
Hmm, you're not quite thinking in GraphQL properly. That isn't how your schema should be designed.

Your mother field should resolve to a Person type, with a mother and/or ancestors field, which would be a graphql list type of the Person type.

Something like this:

Person {
mother: Person
femaleAncestors: [Person]
}
The air at the top of the chimney is cold because it has expanded due to lower atmospheric pressure. The air inside the chimney undergoes this exact same expansion, and loses the exact same temperature.

A fireplace chimney is different because the air at the bottom starts out hotter than the ambient temperature. When it comes out the top, it has cooled but is still hotter than the ambient temperature at that altitude.
Any idea how tall one of these would need to be in theory to support itself? I think that would be a cool sight to see and a great way to prove feasibility.
Show HN: MNMLIST – Share your (Wunder)lists with anyone (mnmlist.io)
Yes! Think about it this way--the smallest height someone could be is zero. So imagine that 90% of the people are zero height, and 10% are exactly 60ft tall. What's the average height?
>You can only extract energy from a tube like this if there's some energy potential between the two ends.

The difference in temperature between the air at the bottom of the tube and the top of the tube is that potential.
Totally agree. Annotation effort can explode out of control if you don't have good tooling. Well done, Explosion!
The voice dictation works well. It uses an internet connection, but i suppose you often need that anyway when you're inputting text.

The finger handwriting works reasonably well too. It's slow though, at least for me, so better for short messages.
Oh yeah, definitely not :)
Yes and he goes into that in the video. The argument is that this accelerates that cycle.
A camera in the Apple Watch seems like low hanging fruit. I wouldn't be suprised if the next iteration has one.
While I am generally skeptical of this idea, 500km/hr winds occur at much higher altitudes - the force is much less than it seems because there is much less air doing the pushing. If a human can get to the edge of space and freefall safely, I imagine that will not be the sticking point.
The Roman Empire is glorified, with some justification, as one of the greatest empires that ever existed and the source (with classic Greece) of western civilization. In a way that Toronto or Canada never will be.

Qualitative differences, sometimes matter.

Also, from what I've read, Romans were complaining that catastrophe was about to happen all the time.
Your statement is completely right, but the way the question was asked, OP probably didn't know whether it was an exchange "that quickly implemented BCH trading." So maybe a better analogy is being in the frying pan and pressing the hyperspace button.

By the way, why would you need to wait to sell a BCH deposit? That confirms almost immediately, right? I could understand AML/KYC on a cash withdrawal, but incoming crypto is zero risk to the exchange.
Thunderf00t has debunked similar concepts its late now i'd go into more detail but people can look up thunderf00t waterseer
I can't link to YT right now because I'm on filtered internet. That said look up Schyler Towne. He gives a phenomenal talk about the great lock debacle of the 19th century and the history of locks all the way back into antiquity.
That explanation doesn't make any sense. If you put that in a Physics exam midterm the T.A. give you an F-.

One classic error is to try to analyze each part separately using handwaving to estimate how strong is each effect and get the result you wish.

It's always better to use conservation rules to analyze the global effects altogether, in this case the Bernoulli Equation and the adiabatic process laws.

The pressure in the chimney is not constant, because it's very high. Air is actually a good insulator, so you can assume that there is not heat transfer between the layers of air. All the heating and cooling is due to the work in the adiabatic decompression. So the air will not be at a constant temperature.
That lkml thread was back in 2010, before invariant TSC was a thing.
It's not, because it's canceled out by the pressure difference. The net energy change of raising a parcel of air in the atmosphere is roughly zero. (Depending on the exact temperature profile of the atmosphere at any given moment, of course.)
Anyone here could run a super tall chimney software simulation ?

I'm super interested in seeing someone confirm or debunk this.
Anyone else interested, upvote please
It's like the flying buttress before it was taken and turned inside out so that cathedrals could be built of stone.

Very interesting, thanks!
its bunk science i have no clue why this got top of hacker news
It's going to be hard to learn one way or another. Chlipala's Certified Programmimg with Dependent Types is free online. Then, Software Foundations others mentioned. Starting with lightweight stuff like Alloy or TLA+ might help. Also, The Little Prover book teaches how provers work by letting reader build a small one. Had some decent reviews.
Yeah, I had all of your qualifiers in mind. I can definitely reliably find 30 minutes or even an hour of uninterrupted time. It's not always at the same time, but I can find it if I gotta.

I think most people can. What's harder is summoning the willpower to use that hour effectively.
Isn't that just a difference of degree, not in process?

I do not know if this works, but I can say that if heat is allowed to get higher in the atmosphere, then when it radiates freely, more will escape into space than if it radiates freely at ground level.
I believe that sign-in-with-X implementations require actually authenticating with X in that context. So in order to sign in with Google to a website, I need to sign into Google itself in the same browser. So in that sense, you are enabling Google to track you in that browser - but no differently than if you just logged into gmail. You could sign back out of Google immediately afterwards.

But just the fact that an app uses Google authentication doesn't give Google any kind of privileged access to that app's data (beyond purely the data that they're logging in on this browser at this point in time) unless the app is pushing data actively back to Google (which they could do anyway for a gmail-managed email address, I guess) or you believe that Google will then subsequently forge authentication requests to that app and pull data out itself. Both of these things are hypothetical violations of your privacy enabled by using auth-with-Google, but for most use cases are rather unlikely, I would guess.
You might be right. It's certainly possible there are "great" active learning programs out there, and my anecdotal experience is definitely just that -- anecdotal. (And even, second-hand.)

That said, I've personally experienced great teaching supplemented by great lectures, and I've not personally experienced great active learning.

I studied computer science and philosophy undergrad. I had great professors and not-so-great professors in each. The excellent ones had excellent lectures that I still think back on today, years later. Plus, as a typical
programming auto-didact, I learn a ton from recorded lectures/talks on YouTube and similar channels. I wouldn't trade these resources for the world. I can remember a handful of classes that had more of a group/collaborative feel to them. I don't think I'd describe any of them, in retrospect, as "successful" classes.

I remember one, in particular -- an algorithms class -- where the professor had just done a long sabbatical in Japan and was trying to cargo cult the group/collaborative learning techniques he witnessed there in his algorithms class, yielding hilarious (and definitely not effective) results. That was the one class where I had to pull an all-nighter at the library, cramming from Sedgewick's "Algorithms" textbook (which wasn't assigned by the professor, but every student had passed around as the right way to learn this stuff) and the odd Wikipedia page. All this effort to pass the final exam -- because I felt like I had spent an entire semester witnessing an educational experiment, rather than learning anything.

I imagine many people are in the same boat as me in terms of their experience levels here. Lots of experience with successful lectures, very little experience with successful group learning environments. Certainly, lots of experience with good and bad teaching all-around, where "style" doesn't seem to be the critical issue.

I am afraid too many of these institution-wide shifts to "active learning" are being made on little more than well-intentioned hopeful faith.
I had a similar scenario occur on my Ryzen 1700 w/ Gigabyte B350 Motherboard. Nothing in the BIOS seemed to help, and updating to the latest version of the firmware didn't seem to help much.

Eventually I just looked into some kernel docs decided that setting the IOMMU mode to pt during bootup might work. Specifically, I added the following to my grub config.

GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=pt"

Not sure if this will help any of you, but it did completely eliminate the problems I had.

Shameless plug, wrote a blog about my investigations into it:

https://ibiscybernetics.com/blog/2017-05-24.html
This is dismissing its mindshare model. People recognize patreon. Once they use it once, the friction to support more artists is minimal. This means if you are someone who wants patrons for your work, you have to use Patreon. Not because of technical merit, but because that is where people are.

It isn't that bad yet. It hasn't taken off massively and conquered the universe like Facebook. But it is currently on track to. The only saving grace is that the usual onboarding is content discovery -> patreon rather than patreon -> content, but if they ever become a content platform and creators stop releasing their work anywhere but on patreon it spells the death of competition.
New research on interpretabiliy
4.3875321
This was a nice metaphor, but remember!--matches must light candles first:

"Oh, hard! that to fire others, the match itself must needs be wasting!" -- Moby Dick (Chapter 37, Sunset)

If you truly believe in something--be ready to lose a lot. One of those things you may lose is freedom from the scope and bile of other's jealousy.
I see what you're saying wrt the difference. Thank you.

The air once at the top wouldn't experience any expansion if it was the same density as the outside air, but what about the energy it picks up from expanding? Wouldn't it still have that? Of course it will have lost some from fighting gravity.
There are laws against selling weapons to criminals.
To anyone put off by this comment: don't be. With all due respect the parent commenter has misunderstood how to shape their API responses.

GraphQL excels at nested data structures. When you have infinitely recursive child nodes of the same type (like ancestors in a family tree) the GraphQL list type should be used.
I see. I made this point somewhere else in this thread, but there's no lawsuit threat because of the terms of service (just arbitration), and if someone were a big fish but asleep at the wheel for the last few months, Coinbase could easily make them whole quickly by just manually sending them the BCH they wanted. Engineering full support as they're doing almost surely costs more than any conceivable loss customers could suffer in the interim (assuming anyone with a nontrivial balance takes responsibility for their actions or inaction).
You realize that other chimneys have an outside energy source and that this essentially amounts to a free energy device, right?

I can scarcely believe that this is an actual level of argument that's occuring on HN.
I think there are a few different opinions on this, one is a total emersion world with streets of your own and it's own landscape. See Snow Crash https://en.wikipedia.org/wiki/Snow_Crash

Another version would be something like the "darknet" in the book Daemon/Freedom by Daniel Suarez https://en.wikipedia.org/wiki/Freedom%E2%84%A2
This inspired me to program a Haiku:

Grasping for authority

A page turns

Close tab
This is why I love Elixir. It comes with tests as a first-class citizen. Colors! Line numbers! Visual grep! DEVELOPER UX. Check this out:

http://i.imgur.com/qDPE9Pc.png
> Why should we NOT punish people for fraud?

Who said he shouldn't be punished? I simply stated that since he made restitution prior to charges being brought, perhaps that should factor into sentencing. I don't know who you're arguing against, or what you're really arguing, but it doesn't seem to have anything to do with what I've been talking about.
It'd be interesting to hear why you'd like 4-6 years. I'm not judging your preference or response, really just curious.
Bottom line is that you'll need to move away from the ultra competitive areas. If a companies can find a younger person to do the work you do then they will. It's not just tech it's everywhere. You can try to fight the perceptions and become a super developer by cramming more tech skills but ultimately it's a losing battle.

I just read that people are rushing to get CS degrees in record numbers. Soon there will be an even larger pool of graduates looking for tech jobs.

My best advice it to look at getting some management and marketing skills. Start looking at teaching. Look at job openings and see what skills they are looking for. Also, go to tech gatherings and start making contacts.

Unless you are at the top tier as a developer, software jobs get scarce as you get older.

Start training for a new field, health is probably a good bet, that's the reality in our new economy these days. Don't wait.
Takes 80h to confirm because of the low hash rate on the fork.
That's not how convection works. It won't be moving quickly in the first place if it cools off. This whole farce of a thread is really tempting me to sink time into calculations to prove that this is absolute bullshit.
Every browser I've used for a long time has supported Accept-Language with a preference list I can change. Are there any that don't?
> The article doesn't talk about electric cars reliance on whatever powers the national grid of that country

Right! You'd be delusional to think that EVs are somehow solving pollution. However, they are almost like debt consolidation - each EV on the street becomes cleaner as each coal power plant is decommissioned. Burning dead dinosaurs in an engine will always be burning deal dinosaurs.
I'm sure that people are well aware that Chinese knockoffs do exist and that they are stereotypically of lesser quality than it's authentic counterpart. I think the only thought process going on for most people thinking is overpriced is the fact that Apple is in the name. On computers they'd be wholly correct. On phones it's debatable. On watches they might be worth it depending on your usage. But that's the best case scenario for Apple, your usage might necessitate that quality. By and large people don't need that kind of quality because they'll never come close to that usage.

In that respect many apple products are very overpriced for many people.
More like "The Life of the NYC Banana". (Still very interesting piece!)
This may be relevant:

Free-standing inflatable solar chimney: experiment and theoryhttps://works.bepress.com/nima-fathi/9/
I've made no argument at all. If you'd seriously like me to make one, I'm going to require funding.