skysight-inc/HackerNews huggingface dataset:
> Half the gross weight of the entire system is fuel.

That's true for jet propellant, but it's not true for hydrogen. A hydrogen powered airplane would have to have a much greater volume than an equivalent airplane fueled with regular jet fuel, but it would have substantially less weight. I'm not sure how this would work out for overall performance, though -- you'd have substantially more direct drag to overcome, but on the other hand you'd have a lot less lift-related drag simply because you'd need a lot less lift.

As a thought-experiment, you could imagine an aircraft roughly the size and shape of a 757 but with the weight and payload capacity of a 737. This might be an acceptable design for a cargo carrying aircraft, but realistically, a passenger-carrying aircraft would need large cylindrical tanks on the wings for safety reasons, but also with increased drag.

> Not to mention, the entire distribution infrastructure is tooled out for liquid hydrocarbons.

In the specific case of hydrogen-powered commercial aviation, this doesn't matter at all, because there would not be a distribution infrastructure, at least as we generally think of it. Instead, we'd need to distribute water and electricity to airports, and the hydrogen would be produced and stored on-site. The equipment to make and store liquid hydrogen wouldn't necessarily be cheap, but over any significant period of time it would likely be dominated by the cost of electricity necessary to produce the hydrogen through electrolysis.

The economics of synthetic fuels for aviation are probably still better, but I think that it might be a lot closer than people imagine. If you could cheaply retro-fit existing airframes for hydrogen they'd be a lot closer still, but I don't think that's likely. It's an interesting possibility to think about though.
I agree with Zubrin that the hydrogen economy is rather silly and said so. I disagree with virtually all of his reasons and calculations as to why, and many of them are extremely deceptive. It's almost like he doesn't think anyone else knows anything about chemistry.

>>Hydrogen is a widely used industrial product. ...

twenty million metric tons of hydrogen a year made from natural gas versus a couple billion of gasoline made from oil; not comparable at all for the suggested economic uses of hydrogen as a fuel. If hydrogen were used, it would be produced in a different way. Otherwise people could just burn the natural gas.

People invested more than 6 billion in fracking. Fuel cells are promising, and of course I compare fuel cells and the proposed hydrogen economy to batteries; they're used to store energy.

I loathe war mongering neocons, and Zubrin absolutely is one and as such has discredited himself as any kind of policy wonk who expects to be listened to by serious people. That said, some of his martian speculations are amusing, and I might even have an amusing conversation if I were in the same room with him, where the more prominent ones (Bill Kristol) I would be in danger of clubbing to death like a baby seal.
Curious. I’m pretty sure my water provider pays the BAWSCA rate. I don’t know why it’s so different.

edit: You’re looking at rate W-24. BAWSCA users seem to pay rate W-25, which is far higher. I don’t know exactly what the difference is.
I find it very difficult to believe anyone is giving "100"s on incorrect spelling or math work.
Who cares?

The site owner that might be sued by Facebook for copyright infringement, for starters.
We don't have a pattern, until we drive our population down to 1 million, or we find evidence of an existing or extinguished alien civilization. At the rate we are going, none of these three are going to happen in our lifetime. If only the Vulcan Amish could turn on a radio station... just once every 100 years, in celebration of their Vulcan Amishness... Maybe a pirate Vulcan Amish radio station. You can only hope.
I meant personally I am less sure about Julia, that my knowledge is less sure. I've neither used it myself nor spent a few hours browser project source code unlike most of other stuff I mentioned.

Since I am not finding what I am looking for in Go then maybe I should ought to try out Julia.

Thanks for the JuMP reference. That looks cool.
I put Github "star" buttons on my portfolio site[1], but I also created my own Gitstars API [2] and am hosting my own Button Generator [3] because of some limitations on how Github's API works with static front end websites. This has the added privacy benefits as the improved stability.

[1] https://projects.tedivm.com/

[2] https://github.com/tedivm/gitstars

[3] https://gitbuttons.tedivm.com/
Serverless Components will really help here. Please stay tuned.
It's a shame that this might actually be how it turns out.
Bed bugs are manageable if you know that they are very susceptible to heat. They are very mobile at night and can travel 100 or 200 metres (as I recall).

The strategy then is divide and conquer. Choose one room and seal it off with masking tape and then steam every little crevice you can find. Keep that room sealed and sleep in there. Once you're not getting bitten you know that room is fine. Then move on to the next room. Rinse and repeat.

Some older homes have just too many cracks and crevices for this process to work. There are companies that will enclose an entire house in a big plastic bag and then heat up the entire thing to be rid of bed bugs. In any case heat and steam is the best weapon. I believe 50C for 24 hours is effective. Any kind of chemical attack would be hit and miss at best.
I think it’s the other way, with AR your virtual objects that interact with the environment are going to float around independent of the background unless you have extremely low latency rendering. At a guess people would find this both distracting and quickly get sick.

It’s only safe if all your doing is displaying a virtual clock floating around or whatever.
Sort of. AWS Lamba (server functions), dynamodb (hosted nosql) and aurora (hosted sql) are all pretty generic services, have significant auto-scaling benefits to using them, and have competitors on competing platforms.

At the same time they are sufficiently differentiated that migration plans would be non-trivial

Disclaimer: former aws employee
After the US dropped nuclear weapons on Hiroshima and Nagasaki, they had no more bombs ready to go, and would have taken at least 12 days to prepare, ship and deliver to its target.

Of course Japan didn't know that.
Well, it's pretty easy to treat F# as OCaml then if you're not doing .Net interop, and mind the edge cases.

Not the newest, but J.H.'s books are great:
http://www.ffconsultancy.com/products/fsharp_for_technical_c... (I particularly like the old spiral-bound F# for Scientists.)

F# is pretty close to a first-class citizen in VS and VSCode (Ionide, etc.) at this point and the community seems good -- what support are you lacking?
I think the peer review system is ripe for, as SV people call it, "disruption".

Even something like an app that you submit papers to, which then anonymizes them, standardizes formatting and presents them to randomly selected experts for review in a certain time period would go a long way compared to the current process. In my lab at a prestigious Canadian university, the papers' authors names were visible as well as the reviewers names because any back and forth post review would happen through email. I think journals and universities need to buy into a system that standardizes this process so at least these basic requirements of impartiality can be met.
Could it be that ending war closes the door on the subject (you dont intuitively ask "what can we end next?"), while ending mosquitoes opens a door to more troubling questions (e.g. "what species should we eliminate next?"). People naturally think of what Crispr will be used for next. What if some evil entity decides to kill off honeybees or pigeons? War is man made so there is less of an issue ending it (and we can always bring it back). Mosquitoes are living creatures and there may be some benefit they provide that we can't see clearly now.
> I can see why data science types who use / produce a lot of (typically throwaway) Python code might be enamored with this

I think that's honestly its killer app. I don't do data science, but I often use jupyter to write short prototypes, and make plots and such.

I've been looking for something that lets me:

1. Set up a jupyter notebook.

2. Run some tests or experiments, pulling in libraries as needed.

3. Ignore it for a few years.

4. Come back and run the same notebook without everything breaking.

If this could patch into Python's native import mechanism and let me specify the repo version as todays date, it'd be great.

import functorflow
functorflow.repo("2019-08-04")

from ff.package_name.whatever import foo

If that gets you a replicable set of versions, it'd be pretty great.
Resisted upgrading since 6s here. Certainly price is a factor. I’d like to get the better camera, but just so many other things I want for my $ besides a new screen when my current one runs most of the things I care about.
It was originally started on a web forum by a few people making it as a hobby, but it got popular quickly. The database was all built in house.
I wonder if this will end up being applied to the usage of third party CDNs as well such as Google Fonts.
AWS provides C2S for the intel community

https://aws.amazon.com/federal/us-intelligence-community/
IMO, I think you're undermining the multiple years of programming/sys-admin experience it would require to self-host + scale on your own. It's much more expensive when experience is minimized, as a function of time.

Unless you've done it before, of course.
I wouldn't consider nature to be necessarily so reputable either. If you want an almost unassailable example of peer review, check this out:

https://en.m.wikipedia.org/wiki/Organic_Syntheses
There isn't a meaningful distinction between ironic advocacy of eugenics and genuine advocacy of eugenics. The only question is whether the advocacy is received successfully or not.

Don't forget the Daily Stormer style guide:

> The unindoctrinated should not be able to tell if we are joking or not. There should also be a conscious awareness of mocking stereotypes of hateful racists. I usually think of this as self-deprecating humor - I am a racist making fun of stereotype of racists, because I don't take myself super-seriously.
This is obviously a ploy and I actually do want to gas kikes. But that's neither here nor there.
I'm not talking about stopping or anything. What I'am saying is :

1- The malaria issue is depicted as bigger than it is nowadays, as if the western world has some kind of weird fetish about it.

2- Maybe using world-changing genetic engineering is not really worth it, as we already made huge progress toward the solution without using such a extreme solution.
Or, its too much work for them to fund SETI research on their planet... and they find that they can spread through the galaxy faster, if they just wait for a civilization to a) announce their presence; b) nuke themselves to the stone ages; c) and leave lots of space for the aliens' 100-year starships to drop off a few million colonist to the 'intelligent' species that just nuked themselves. Slow and steady wins the race.
I see a lot of magazines shut down and I have to wonder what the costs to run these are, even at say a low number of prints.

There are times I wish I could sit down and do some reading in magazine form, etc. But none of the topics I want to read exist as far as web development goes. It makes sense due to the immediacy of all the content i get... but I do sort of yearn for a curated physical form too...

Instead I find myself flipping through my son's lego magazines.

I hope they come back in a cheap to publish / novelty type thing.
How to beat Bezos: Baby Amazons take on their American role model
Separating child from phone addiction is Byzantine?
Depends on the journal, for example

https://en.m.wikipedia.org/wiki/Organic_Syntheses
Cool well I guess I don't have to read the article since the argument and conclusion are the title.
Death of an entrepreneur: V.G. Siddhartha, boss of Coffee Day, is found dead
The "domain by % encryption" table[0] is really cool - effectively a "name and shame" for still having old or misconfigured software.

0: https://transparencyreport.google.com/safer-email/overview?h...
You are, of course, in your right. It just won't have any effect.

Gp is probably on your side in wanting this sort of thing over, and just trying to redirect your energy towards a legislative solution.

A legislative solution would be hard, but a moral solution enforced by shame is borderline impossible. There are too many corporations, if we damage the brand of one once a month it's still a risk worth ignoring.
The Cool Food Pledge
Im thinking on a very small level. Policing efforts should cost less than the crime. Too often it is the opposite.

I would rather someone speed through my neighborhood than have 3 police cars make a spectacle and spend thousands of dollars.

Speeding is a problem fixed by a proper education (in theory) It is not fixed by chasing someone down and giving them a speeding ticket.
Everyone talking to a politician about an issue is a lobbyist, that’s what lobbing means.

It’s easy to think only those people you disagree with are lobbyists, but even just sending a letter to your congressional representative is lobbying. And there are paid lobbyists on both sides of almost every issue.
In office but not in power: Are Western democracies becoming ungovernable?
>All but one - low power

Even that part is becoming less true. I've seen multiple datasheets in the last year that promise worst case FFT/IFFT performance at 2mA. Measured performance has been less than a quarter of thst.
Well if the referrer header matches the shared url it's just bloat in the request headers, and if it doesn't it's possibly leaking details it shouldn't, like perhaps a token in a query parameter. Twitter, Facebook, etc doesn't really need to know where a user initiated a share anyway.

Either way making sure that window.opener isn't available to random sites is a critical security feature and in some browsers that require you to set noreferrer, so better safe than sorry.
I am talking about at the platform level. My mom isn’t going to install DNS666. She wouldn’t trust it.
Are there any good ones that exist? I'm a security analyst and I frequently work with large text files, 200MB-1GB and the text editors I've tried are incredibly slow.

A lot of the time I can use grep and other command-line tools to find what I need, but given the nature of the job I don't always know what I'm looking for so having the raw file open in a text editor is sometimes the only way.
Ray Tracing in One Weekend in Futhark
The conclusion yes, but the argument?
Pulling press pases, just about ending press conferences, Calling everything fake news. Current admin hates the media unless it reads from it's talking points.
Yeah, I suppose I am.

Easier said than done, though.
Or google "risc5" in quotes.
This is a great paper, the really cool bit is that it seems fairly straight forward to convert this to a larger process. Basically add saltwater, warm it, take the settled part of the solution (which is now desalinated) out of the bottom, and the salt dense water out of the top, cool it and precipitate out the salt. Nothing has to evaporate everything runs at a normal vapor pressure so you aren't struggling with high pressure and low pressure domains.

I'd love to see if you could use spent nuclear fuel (which is an excellent heat source) to just run one of these things continuously for a couple of decades :-).
If you find yourself fighting with mocks, ask yourself: is there a deeper design problem with my code? I often find that things I can't test easily have crappy design.
The "+" only saves you a few keystrokes. Using "*" is also fine and not wrong, but a little more error prone, so I would note to better use "+" in a peer review.
This is...interesting. Once i'm leaving a voicemail, why would I prefer that over a slack message?
Idk where the discrepancy comes from, but I trust WHO[1] more than UNICEF on this kind of topics.

About our ability to fix the issue: I agree with you, and that's why I really don't like the idea of something as extreme as eradication of a whole specie with gene drive for something that's mainly an infrastructure/underdevelopment issue in Africa.

[1]: https://www.who.int/en/news-room/fact-sheets/detail/malaria
Funny enough, Cuttles is created by Karen Rustad. She also drew the Ferris logo for Rust.
You can't "iterate repeatedly" in a normal human lifespan.
That’s how most cabs get their business in the US perhaps. I have only ever gotten cabs via booking (phone and app) or simply going to a taxi line at a hotel or airport. I never hailed a cruising taxi in Europe. I don’t even know how to tell an occupied one from a free one here (if it’s even possible). Getting a cab via an app I have done for ten years now.
Yes, I’m so tired of these article titles. Pass.
Yes, precisely—wasteful defense spending accomplishes the goal of supporting the middle class with jobs while failing at the goal of killing people. It's not an "I told you so" thing. I'm genuinely fine with massive taxpayer-supported boondoggles that create jobs in the long term. My objection to defense spending is that it kills people, not that it takes money from my paycheck to create more paychecks.
Hey, that was fun :-).
Yes we should ignore those. They are compliance vehicles sold only to satisfy CARB rules and are not otherwise economically viable. Most of the hydrogen is created from natural gas, which means zero reduction in greenhouse gas emissions. Yes in theory hydrogen could be created by electrolysis with renewable energy, but the efficiency is so low as to make it pointless.
Tuning Nginx for more requests per second
Many previous threads; some of the larger ones:

2017 https://news.ycombinator.com/item?id=14909786

2014 https://news.ycombinator.com/item?id=8696975

2014 https://news.ycombinator.com/item?id=7214400

2013 https://news.ycombinator.com/item?id=6700103

2013 https://news.ycombinator.com/item?id=5924709
"Over the decades, as versions of this housewife’s setup have eliminated dining rooms, pass-throughs, and farmhouse tables, the open-concept kitchen, centered around an island visible from all sides, has become not a labor-saving device but a stage on which (mostly) women are forced to perform."

I gave up here. This is so stupid that I'm not sure what is the premise that I should critique.

Also Im a guy who cooks in a kitchen with an island and I love it.
Sounds very cool. Is there any way to follow your progress?
Not exactly the same thing, but I saw an interesting print from Japan during the time when Dutch ships first entered the harbor. It was clear at that point that Japanese ships were technically inferior to the Dutch ones, and the perspective from the artist is interesting.
https://web.archive.org/web/20171219041521/http://www.iisg.n...
Genuine question. Why would you write a guide for 'noobs', when you don't know the basics yourself? It seems kind of silly.
Argument: "America is rigged against workers"

Conclusion: "yes"
I concur. Saw it happen first hand as well...
I'm rather young- and I know how to T9 type- but I got my flipper in middle school.

I honestly quite liked it, not that I ever want to go back now.
I don't believe it would come at a huge cost to current lives now; I don't think it would cost any lives now.

I think the ill-will is probably worth it, especially if it turns out to work and future Brazilians agree that it worked. And how pressure (I didn't say sanctions, a previous poster did!) is applies matters, obviously the aim should be to both minimize the pain to normal Brazilians, and to make it as clear as possible why the sanctions (if they're part of that pressure packages) apply, and to do so so forcefully that change is inevitable.

I don't actually think Russia is a good example here at all; because the sanctions imposed on Russia are due to state belligerence - it's not easy to target those sanctions, and the Russian state has ways to subvert whatever targetting does exist. That's quite different in Brazil's case. The Brazilian state may not longer be enforcing the rules against deforestation, but it's still at least officially the policy, and I kind of doubt most Brazilians actively want the rainforest to disappear. Instead, the problem is economic incentives; and those can be more targetted externally, for instance by targetting industries that primarily cause the destruction; e.g. a ban on beef and milk products from countries in which deforestation for cattle ranching occurs, etc. If you want to retain the appearance of neutrality and don't mind spending a bit of money, you could even offset that by reductions in tariffs elsewhere, or even by subsidizing some other thing Brazilians care about or whatever.

Regardless, that's only ever going to work if Brazil eventually sees the light and agrees that saving the rainforest is worthwhile, so whatever penalties are part of the pressure package must never be enough to simultaneously piss off enough Brazilians to matter while being small enough that they stay in force for long enough to cause bad blood. If that's not doable, better to look for other pressure points; there's nothing to be won by pissing people off, harming yourself (sanctions aren't free) and Brazil, and then not having anything to show for it.
Two weeks ago: https://news.ycombinator.com/item?id=20491203
One thing I've noticed over the years, is your propensity toward forcing other people toward your preference using the government. You are welcome to that view in your country (i.e. European), but that is so anti-American and illiberal that it's simplly not a universal truth. All countries do not need to operate in the same command-and-control way. We need diversity in governance.

The USA is not some 'blood and soil' country with a history of aristocracy. We subsidize the national defense and drug R&D costs of your entire continent. Freedom lovers of all ethnicities recognize America's unique nature as the sole proponent of freedom, and they flock here.
Right--I'm not saying it's trivial, just that it seems doable with many millions in budget.
Well, developers can’t ignore the SE resolution because the 4.7 inch phone has the same resolution when in zoomed mode.
Not sure what GP means by a "burner phone", but I can see a pretty wide chasm between classic "dumb phones" (I fondly remember my armored Nokia 5510 with a weapons-grade antenna) and transitionary pseudo-smartphones (like an Alcatel wossitsname that my grandpa used to have) which managed to get the worst of both worlds (touch screen with idiotic mapping and no undo, etc.)
Probably a copy paste thing. Formatting looks like markdown for reddit.
Thanks for the response. Its great to see there's a more gradual way to get into the Rails tutorial now. I am aware that your original tutorial was probably not aimed at a complete beginner with no experience at all, but I was basing my comment off of the thread title which is "favorite tutorial for total beginners." I know your tutorial is considered by most to be great, I was just sharing my experience as someone that attempted to go from absolute zero to the Rails tutorial long ago. I hope I didn't seem like I was putting it down in general. I mostly work with Python scripting and Jupyter notebooks, but I've been wanting to get back into web development for personal projects. I'll check out the new courses.
In all honesty I don’t think my comment is worse by any means.

I just stated that if you consider skin color when judging one’s opinions, then you are a racist. And I stand by my point.

Please let me know which of the guidelines my comment broke.
Interesting. I'm not in academia so I guess that's showing here.
A week long punishment is pointless. A child's perception of time means a ten minute punishment is as effective (probably more effective) than a week long punishment.
Doing What ID Couldn’t: Returning Music to Jaguar Doom