skysight-inc/HackerNews huggingface dataset:
Fuel cells are a possibility. There is some pretty high power densities (2.5kw/kg for SOFCs, 10kw/kg for less efficient PEMs). Electric motors are now reaching 15kw/kg. For comparison, a GE90 is about 10kw/kg, and older turbofans down to 2kw/kg. Running on liquid hydrogen presents some problems that are definitely solvable, but SOFCs can run on pretty much any hydrocarbon fuels at extremely high efficiencies (50-60%, 80% with combined cycles, compared to the ~45% that jet engines get).

I actually think the future may be a lot more simple than we're making it out to be. With some slight modifications to design, we could run existing turbofans on liquid hydrogen fuel. The biggest objection that most people have is the storage of hydrogen...but liquid hydrogen doesn't actually need to be stored in cryo tanks as long as the fuel is being used at faster rates than it evaporates. That's not a problem with jet engine consumption rates...low tech insulation may be sufficient.
"Hurry up, please. It's time."

William S. Burroughs, Western Lands, 1987

He lived another decade, however.
Is gab really a “cesspool”? I just looked at it for the first time. The way people talk about it I was expecting /pol/ squared, but the parts I could see without making an account seemed surprisingly normie, more reminiscent of instapundit than Stormfront.
I don't understand how this comment is related to the submission in any way.
I always thought that the Zilog mnemonics were better than Intel's. I learned Intel first, but immediately recognized that Zilog's were better once I became aware of them.

The only C compiler I had on CP/M was BDS C. It was fairly limited and had no floating point support whatsoever. Maybe that's the one you're thinking of?
Wow, that's terrible.

Wishing you the best in your recovery and life :)
> It's very legal, and very cool.

With who? I'd really like to know who is copacetic with this kind of surveillance state.
I don't understand. "Not even close to sustainable", you say, then complete the sentence by describing the situation in which Linux has been and continues to be sustainable.
Yes, and even two or three, not to put all your eggs in the same basket...
I am not sure how you use Word and Excel but google's offering are like tinker toys compared to what MS has put out for the desktop and web.
Gitpod is awesome and a really bright team behind it.

However, Repl.it is different in that we're focused on speed and minimal configuration. You don't even need to login to clone a repo and start it.

The URL structure is repl.it/github/<GitHub path>

Try this 2048 implementation in C:
https://repl.it/github/mevdschee/2048.c

(You can even run it on your phone!)
> You realize that Qt is dual licensed

what part of the thread did you not read? We've covered that already: the other option is the closed commercial license which since the switch from Nokia to QTCOM has become exorbitantly expensive

> Nobody cares about license cost of Qt (…) We don't use LGPLv3 in Qt. We buy commercial license.

You sound like you work in Qt Marketing, not in embedded.

> It's quite low compared to everything else

That's rather ridiculous. Most alternatives cost zero.
How is this possible? I'm often asked to do something I don't know how to do. Figuring it out ("learning") is part of the process of accomplishing. I don't know how you can separate learning from doing.
Using Flutter has been extremely helpful for us in a startup environment, getting apps built for both iOS and Android in half the time (or less) compared to doing both. Our team has plenty of native mobile experience and has built separate native apps that mirror functionality in the past.

Flutter was so much more efficient, it actually lives up to the promise of write-once, build to multiple platforms.

As for design, we have a very custom design and in Flutter you are in no way locked into Material design.
https://knowyourmeme.com/memes/very-legal-and-very-cool
Cool as in "tacticool," like driving military surplus IED-hardened vehicles around for small town policing.
Laws Protecting Journalists from Online Harassment
I've looked at a bunch of school financials, and I am not really seeing the admin bloat that everyone quotes.

That said, its not really the only metric that matters, but it does matter a lot. And it matters a lot more than all other metrics around cost because you can easily reduce those other metrics if they are truly bloat.

Professor salaries cannot easily come down, and you cannot easily add more kids per class.
Sounds like you have a billion dollar idea then that you can sell to Google.
No and probably it will never happen in javac. Some IDEs may try to do static code analysis to identify possible uses of URL.equals (e.g. Map<? extends URL, ?>), but I doubt anyone would invest in this feature.
I did a quick search on the paper, didn't find "google" nor "titan", which is the secure chip made by Google. Would it be vulnerable too?
> What do you actually gain by capping posts to 240 characters per message

brevity? it s a virtue
Same with security, unfortunately.
They're "on a roll" lately because there's been egregious overstepping of government against free speech.
I feel that the christian God fits this bill especially well, when you look at him a bit more abstractly: He is able to give purpose (does care and is something absolute rather than mending to what one particular human beliefs), is interested in staying in contact with his creation (as opposed to deistic Gods), values existence so high that 1) it should be contiued eternally and 2) not in a replaced, but a renewed form. Many christians, many opinions, but I feel confident in this faith. I can recommend C.S.Lewis, who is great about putting God, heaven, hell in terms that make sense and don't reek of religious fanaticism.

I would be Buddhist if I would not be christian, but I am glad I can be christian. If what I believe is true, then boy are we lucky!
How does this fly in an organization where your promotion is based on sprints and not sustainable coding/quality?
If you don't bring in grants you'll be fired. And good luck funding a lab w/o grants.
> Odyssey has sophisticated asynchronous multi-threaded architecture which is driven by custom made coroutine engine: machinarium

Let me find my space helmet. The voice in my head is crying 'architectural astronaut'.

We are forgetting again to ask the important question of "what else did you try, and why didn't it work so you had to write your own?" I think I get the 'why' for pooling. I know a guy at work who struggles a bit with query rate (query speed is great... until it hits the pool limits). I don't know the 'why' for the technology it's built on top of. Lacking that, I see someone wanting to write machinarium and then building something on top of it.

Which doesn't sound like a bad thing at all, until you find a feature the 'thing on top of it' gets wrong which is consistent with the thing the primary authors are most invested in. You can't have that feature because machinarium doesn't want you to have it. Close ticket.

Form always triumphs over function when the architect is invested in their solution and not the user. Making a library that embodies that solution, at least in my experience, vastly amplifies that investment. That also telegraphs the investment, which if you know to look for can tell you 'buyer beware'. Buyer beware.

Machinarium sounds a lot like libuv: https://github.com/libuv/libuv/wiki/Projects-that-use-libuv

Have I got that wrong?
Not everyone enjoys city living.
The servers care because for many years clients had no guarantee of handling well-formed html and javascript.
Just to add to this, I am not convinced that resume's are going to die any day soon, but in the meantime, linkedin has some excellent ways to show skills outside of the resume with their feature of people underlinig skills of other users. Why did the author of this post not adress that?
The Circle (both book and film) was, sadly, a largely botched attempt to explore issues like privacy, the power of tech companies, widespread surveillance, etc.

Missed opportunity in that the book was only readable if you took it as a deliberately over the top "if this goes on" fable. And the film was mostly notable for how it squandered a top-notch cast.
The idea that a lightning bolt could be used as a power up source has been thoroughly debunked by myself and others in this thread already, but I thought I’d take another angle in response, just using electricity in general.

A single GE90 aircraft jet engine used in the 777 is up to 111,000 horsepower[0]. So for the Boeing 777, that’s ~220,000HP. Converting horsepower to megawatts, that’s 164MW of power during takeoff (and approximately half that during flight). There’s approximately 500-1000 B777s (very rough, but educated guess) in the air at any given moment during the day. That’s 82.5 gigawatts of power just for the 777 flights alone, not counting all the other commercial aircraft in use.

So how much is 82.5GW?

> The Palo Verde nuclear power plant in Arizona is the largest nuclear power plant in the United states with three reactors and a total electricity generating capacity1 of about 3,937 MW.

So 40+ of the largest nuclear power plants in the US?

> average wind turbines produce 1.5MW of power at 100% efficiency

So 55,000 wind turbines at minimum? Better hope it’s windy!

Flipping it another way:

> an average LCD TV uses 200W of power

So in other words, turn off 400M TVs around the globe to offset the power needs of up to just 1,000 planes.

Now finally...

ignoring the electricity generation needs, let’s talk about just battery storage on the plane itself. A typical 18650 (the battery that is commonly used to make large cells, for example in your electric cars) is something like 9W of power. So you’d need something like almost 20,000,000 batteries just for a short flight. Each 18650 weighs about 45g (not including wiring harnesses and safety gear). That’s 200,000 pounds of batteries. The batteries alone for a short flight is multiples of the weight needed in fuel for an international flight.

[0] https://www.bangaloreaviation.com/2009/10/worlds-largest-air...
I'm in Germany though I won't say more than that for obvious reasons ;).

The coffee example was the first thing that came to mind but really it's so much more than that. At work we do weekly team meetings, we get regular themed events during national celebrations as well as over the whole year like baking contests, sports competitions, vacation photo contests, ... We get a sense of direction from management, we get a sense of purpose from our work and the whole company is focused on working together on a single goal to release our products, we get to interact with other departments and talk to people with a huge range of skill-sets, we're made to feel our work is valued, etc ...
Obviously there are drawbacks that I won't go into, it's not all rosy, but a lot is done so that work feels like a pleasant part of the employees' life and not a dreadful grind to get through.

Though the environment is weighing on me and I seem to have only negative things to say, I'm very grateful for the opportunities that my university has provided for me, and I love my labmates. I often feel it's a personal failure that I haven't been able to bring over some of my company's positive traits to our lab to spur some life into it, and that someone else might have done better in my place.
Just a new business opportunity. Space sanitation workers. Or space plows.
> There is simply no mass transit option that can equate this, end of.

Sure there is - for some situations. There is something called "rapid transit". The working definition is "faster than by car". You actually have that in a few places - Chicago, or New York, for instance. But for it to work, you need a couple of things. It has to go many of the places that people want to go. It has to be very frequent - so frequent that you don't check the schedule. And it has to be somewhat slow to use the car.
> The Wayback Machine now automatically archives every new external link added to the English Wikipedia.

Links submitted to Hacker News should be auto-archived, too: I often stumbled upon dead-links [0] which otherwise had generated insightful discussion on news.yc. Adding archive next to web would work nicely.

[0] Launch HNs, in particular.
"Yes", in general but "not yet", in practice. FATpick's internal data-format supports color-coding the note "bubbles" to indicate the recommended finger to use to "fret" the note, but the standard import format doesn't include this information.

FATpick has an algorithm to programmatically determine where to place your fretting hand and fingers (when the information isn't available in the score) but to be honest I wasn't confident enough in that logic to enable it by default quite yet.
The ban is because those browsers are "hard to fingeprint as safe".
Please don't post flamebait to HN, and especially not things like regional or national slurs. It's of course fine to talk about your personal experience; but not fine to express it in the form of generic angry putdowns.

https://news.ycombinator.com/newsguidelines.html
https://www.varialift.com/page/specification-arh-50

200mph at altitude... well, with the jetstream it seems.

Also, could electromag catapults help with takeoff?
Agreed. PMs (product or project) should rarely speak during standups; instead, they should be listening for blockers and other action items for them.

I've worked in environments where the PMs micromanage like this. It's both hellish and extremely inefficient.
With iOS 13.3/iPadOS 13.3 Highly probable that the checkra1n jailbreak
I figured out that you can technically specify type in Excel to prevent destroying the data, but by that point I’d much rather just load a data frame in R or Pandas.
> less jets and more turbine aircraft

Assuming you mean turbofan vs. turboprop here, since both of these are turbine-driven.

In either case, my understanding is that turboprops don't present a substantial gain in efficiency, as turbofans allow for higher and faster cruising altitude, which reduces drag on the airframe.
Albert Camus on how to live in an absurd world
Layered Programming (2013)
Since you're here:
We currently have a lot of workloads running on N1 machines, which seem comparable cost-wise to E2. Are we likely to see performance improvements shifting to E2, or is the only concern with N1 the fact that it's a previous generation and will presumably suffer limited availability at some point?
Where I work standups are for devs only. The product guys are involved in planning and reveals, but otherwise they stay out of our hair. We're expected to complete what we've committed to on time or promptly notify the product guys if that's not going to happen for whatever reason.

About once a week (usually Friday) I tell my team I'm going to spend the day researching or exploring some new idea that doesn't have any stories yet. It's never a problem. A decent chunk of our big leaps forward for our projects have come from us working on random stuff nobody told us to work on.
Apple Used the DMCA to Take Down a Tweet Containing an iPhone Encryption Key
Doesn't every grocery store sell weird mags like the National Enquirer?
Sorry everyone, I think glitch is having an incident right now! :(
How would that matter to google though? Better to push the user directly into chrome and then the rest of Google offerings then share ad revenue.
The Justice Department Will Reportedly Investigate Google’s Fitbit Acquisition
It seems to me that they have two somewhat separate engineering challenges. The electric motor and throttle control system, all the drive train stuff forward of the instrument panel in a Beaver. Plus however they retrofitted the cockpit engine control. Which might be quite a bit lighter than a pt6 turbine retrofit to turn an old Beaver into a turbo Beaver.

And then the other much harder problem which is achieving sufficient Wh per kg energy density in batteries, and Wh per litre of volume. For which they are dependent on global factors for r&d of batteries and improvement in density.
i feel like the function of success would be pushed into other areas like the actual value of the feature being made available to competitors. or speed of competitors adoption of said feature. basically, sharing a foundational open standard could make everything thats distinct about a feature's implementation, or that companies policies / mission, the decider about what differentiates success.

now, current leaders probably wouldnt want to adopt a system like this because it would be a test of their value on all those metrics, but i wouldnt say that makes the notion doomed from the start. i get what you mean though.

i mean, where would be right now without the open standards of 30 years ago?
Hi Mike, this looks neat! In the linked document you mention that in addition to lit-html it's also inspired by HTM. Briefly looking at the readme for that project, it does look quite similar. Could you clarify what features/design decisions in HTL distinguish it from HTM?
>> We live in the only point in human history where we can actually save all of humanity's knowledge and culture

Playing devils advocate here for a moment. . .

Considering we as humans learn little from our past, keeping all of this knowledge is a benefit to whom then? Some people who feel nostalgic about Sony's first walkman? Or maybe people using it for nefarious reasons? If humans continue to make the same historical mistakes over and over, what benefit does the human race gain from cataloging all this information? I would venture to guess, its more plausible it will be used against us instead of furthering our own culture.

>> We know more about how Rembrandt painted and lived than we do about how Atari 2600 programmers worked and lived

There is a huge difference between saving all of Rembrandt's stuff than it is some 22 year old college drop out programmer who created a video game in the hey days of long forgotten startup company. And yeah, there have been numerous documentaries, and articles written about Atari in those early days. Who would want to save a dilapidated roller rink under the auspices that a great and noble video game company used it as their HQ for a few years??

https://www.polygon.com/2018/7/6/17542154/atari-book-valley-...

But then this roller rink down the block became available: 10,000 square feet! I mean, we were just jam-packed, and we had people on roller skates actually running around on the roller-skate rink building Pongs.

While I do think leaving certain things to the sands of time is a good thing, vacuuming up everything is just as worrisome. Are we going to be hoarders of a bygone technological past where a large majority of the "stuff" we save will have little, if any use to anybody anymore??

Having a background in anthropology, I find it fascinating there will be many generations of kids who leave no physical trace of their existence since a large majority will be in electronic form. Just imagine how people's lives are in a sort of suspended animation after passing away and having their Facebook pages live on forever.

It's a bit hard to wrap your head around tbh.
Sorry about that; the app is hosted on glitch and they seem to be having some problems serving apps right now, so it’s not something I can fix :(
Hopefully, this puts to rest the idea that government can use "private contracts" as a end-run around constitutional and legal restrictions on their activity

They have been hiding behind the NDA as a reason they should not have to follow federal disclosure laws, but never in the history of the law has a private contract superceeded the law itself.

they also hide behind these same NDA's when criminal defendants get to court and want to challenge the use of the tech on 4th amendment grounds

Hopefully the ACLU can put a end to that, the government should not be able to contract with any organization that prevents them from disclosing their activity to the public. Seems law enfrocement has lost sight of who they awnser to, which should be the people of this nation
Most street drug dealers use bicycles, EU and abroad.

More freedom of movement, no license nor plate.
Show HN: Learn by Doing Projects for Engineers – Real Dev
Apple News editors quietly influence UK's election reading
Interesting.

Whenever there is talk about pedestrianizing a street in my town, the usual suspects immediately claim that this will make local businesses go bankrupt since "people can't drive up to them". Never mind that stopping isn't allowed anyway on those streets. I don't understand the logic.
> The business agreements determine the price paid (which in some cases is zero, but often not, and is negotiated like any other business deal).

I do not understand this part: why is a business agreement necessary to simply discover BGP paths?

There is an ISP with users that want to go to Youtube or Akamai: the ISP has a router with the full BGP prefix list of the Internet, including for those of YT and A. YT and A are probably in most of the larger IXPs, and presumably the ISP in question is also at a few IXPs.

Why would a business agreement be necessary for the ISP to send traffic over the IXP's switches to the CDN(s)? What's the point of connecting into an IXP if you add the 'overhead' of business agreements?
All electric with this century's technology might work for 8-16 passenger short-haul aircraft, if that market can be created (think, many flights from various regional airports between the SF Bay Area and LA area). Nothing bigger is going to fly without a massive breakthrough in battery energy density.
"If the service provider ever decides to discontinue it, and they eventually will, all your codes will become meaningless."

Oh By will continue to be maintained into the indefinite future. Come see in twenty years.

I have a very good track record in this regard.
Suggest it at https://repl.it/feedback/ :D In fact,y es this would be really cool!
Number/duration of coffee breaks is hardly "amount of coffee you drink". And I find it hard to believe any software engineer would catch grief for any amount of time spent away from the desk of their output was measurably above average. So this complaint sounds like it's actually, "I don't get anything done and don't even bother trying to appear busy and my manager tried to talk to me about it".
What is a 'relevant' search result?
> Now why can't the FDA afford the space to keep their pages forever on their own site? Fill in your favorite conspiracy theory...

This seems like a prime example of Hanlon's razor. Tight government budgets and lowest-bidder contractors not bothering with page permanence strike me as the most likely explanation.
Uber delivery workers in Mexico protect themselves with secret WhatsApp network
Replying purely for reinforcement of the parent.

This is not just common, but the norm in most organizations. I think the only time in the past 12 years (working with probably 20 organizations) where this didn't occur is the one engagement when I was charged managing the team.

There's far too many places where a team of even just four or five developers will spend 30 minutes (sometimes an hour!) every morning in "standup" being grilled on every single item committed to in the sprint.
I'm pretty sure the specification of this class predates name-based virtual hosting. After all, that only appeared in 1997, or perhaps late 1996, and it took a couple of years to be standardized. The URL class existed in Java in 1995 :)

(Edit: And really, virtual hosts are an extremely weird HTTP feature. What other internet protocol cares about what domain name you used to establish a connection?)
> I've met certified accountants whose daily job was to take an excel spread sheet, add 1% to every cell with a number, then return to the client. It's not automated but not because it can't be automated.

Well, that's just dumb. We can do better. Those accountants you met can do better!