skysight-inc/HackerNews huggingface dataset:
1) That's not a "jet engine". It's a turboshaft. A turboshaft is a gas turbine producing its power mechanically at the shaft. A turbojet is a gas turbine producing its power in the form of reaction thrust out the tailpipe.

2) Gas turbines scaled down to small size (let alone "micro" size) generally have dismal thermal efficiency. All the most efficient gas turbines are gigantic (tens of thousands of hp).
Here is a link to HN comments and discussion: https://news.ycombinator.com/item?id=12375616
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Just a point of fact, the DHS was created at the end of 2002.

As far as the UK, their processes are just as stringent but less public. It is interesting that the UK allows in some radical Islamic clerics but banned an American talk show host who talked about radical Islamic clerics.

The U.K. Has some of the strictest immigration in Europe for non Europeans. I am not defending the US or DHS, I am only providing some perspective that the US isn't particularly unique, just more public about it.
It likely has zero measurable impact on stopping terrorism.

It will have measurable impact on the millions of people who have to give up privacy to enter the US, some proportion of which is likely to be further negatively affected by having something "suspicious" in their profile. Like being idiots who once liked something offensive as a joke, or being friends with some idiot who is connected to ISIS on some social network.
It's possible if we didn't lock them up there would be more. Probable, IMO.
The large volume of very hot exhaust you mention is your clue that the thermal efficiency of small gas turbines is poor to dismal.
Here is a link to "Proposed Collection; Comment Request; Arrival and Departure Record: (Forms I-94 and I-94W)"

https://www.regulations.gov/docketBrowser?rpp=25&so=DESC&sb=...

Which was originally submitted by quickben
Sure, don't live in the Tenderloin.

But that doesn't mean you can't live in Forest Hill, or the Excelsior, or Balboa Park, or West Portal. I find lots of people totally discount what I think are some of the nicer parts of SF to live in because they're not walking distance from the mission.
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You have to go to the Visual C++ page to see the rest, as Visual Studio was borne out of Visual C++ https://en.wikipedia.org/wiki/Visual_C%2B%2B
The rapid acceleration of technology is causing problems in many areas. Freedom means trusting each other, and I fear we (as a species) cannot adapt our social structures fast enough. We are falling behind because technology is being introduced to society faster than society can adapt.

One of my older posts addresses the larger picture of this problem: https://news.ycombinator.com/item?id=8916033
If it is truly optional, then why ask for it? "Bad guys" would just opt to not provide it unless they have "clean" profiles to give out.

Making something like this optional only makes sense as a way of getting it through without too much controversy.
> Many Nobel prize winners have been Chinese, only one was a citizen of the PRC when they did the work/received the award

Is that statement supposed to inform me about the shortcomings of the PRC, or those of the Nobel prize? I can't tell.
Not really. Basically a social profile can help clear a person but a lack of one wouldn't condemn a person. There's precedent in the Single Scope Background check process for Top Secret clearances: a lack of data just means more weight will be given to other factors. You aren't punished for a lack of data. This is common when people might not yet have a credit history.

However, this policy is entirely dumb because social media profiles will be created specifically for travelers to be 'clean.'
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Could you justify the downvote for a factual correction?
How did you come to that conclusion? Actually just curious.

It seems like there could be a really big difference between the cost of conventional power between Australia and the US if what you're saying is true.
Biggest differences are:

- The ease you can get started with it. Just include the script and use it (no config and bootstrapping).

- The middleware system, which makes it easily extendable and configurable. Something like Express or Koa on the server side for Node.

- The use of ES6 Proxies for data binding (can be used with getters/setters, inhertied and expando props).

- Probably speed, but I do not have any trustable benchmarks yet.

- The use of many simple new native APIs, which makes understanding the code itself and contributing to it easier in my opinion.
The biggest drawbacks of Spotify and Netflix is the limitation of content, which comes from the fact that not all labels or movie studios are supportive of this. This is not an inherent problem of the platform itself of course. If this problem was non-existent, I am pretty sure that both services would be used by almost everyone.
To be honest, I was hoping for something more impressive, like making a slack bot which did some heavy lifting (scraping conversations about real estate?). The moment I saw "scraping craigslist" the magic was gone.

The title sounds like "How I used a cherry to make a birthday cake". Intriguing, yet disappointing when you learn he only placed the cherry on the top of the finished cake for pretty decoration.
If you can work a forteress without both coal derivatives AND metallic ores deposits, you're a better dorf than I am.
Having to be careful what kind of jokes you like or articles you link reminds me exactly on how people behaved back in pre-1990 socialist era where liking or retelling a wrong joke got you in trouble with your boss, police or a landlord :/
even academics do have to eat occasionally.
But as the people responding to you have pointed out, the above is not what these cost estimates are referring to.

They are referring to the estimated burden in terms of the time spent by the people filling in the forms.
I think the idea of renewing individual works indefinitively for a flat fee is good enough. If Disney really wants to keep Mickey Mouse and has enough money then let them keep him. But please don't forcibly delay the copyright expiration of everything else.
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Uhm, not really, but you might make 20 smaller ones.

http://x86.renejeschke.de/html/file_module_x86_id_176.html
At least in this instance we can avoid this specific persecution by opting to not visit the US.
I couldn't begin to identify half the deposits he needs, let alone operate a DIY ore furnace. Stone age tools for me!
And assuming you assimilate the tips about procuring food you still require some measure of cooperation from the environment in any case!
So is it ok if I provide my pornhub account?
Then the costs are even higher.
Is it feasible to build an intelligent debugger to reduce debugging time?
We have a pretty vast and complex C++ code base developed for over a decade. Sometimes, when some issues are reported, we spend a lot of time debugging the issues eventually landing on some common area. The problem is particularly acute when new members join the team and has to spend considerable time debugging issues. I was thinking of developing some kind of intelligent debugger, something which can give some hints where to debug based on the nature of the problem, thus reducing turnaround time for bug fixing. I know it would be complicated, so just wondering if it is worth the effort. Has anybody worked on something similar and has some prior experience?
It'll be great precedent for when Iran, China, Russia, etc. want to do the same thing.
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Rooftop is viable if one accounts for a possibility of future price hikes or disasters that leaves the house without grid for substantial amount of time. Essentially one treats the extra cost as an insurance premium.
He probably has less sympathy since "she has been offered a winter home in a local village before (...) but has refused it."

I can understand how much it pains her to leave her home, but seems a bit much to ask some unrelated person to leave theirs to live with her.
> I'm not sure about western countries, but democracy might have some tools to prevent stupid presidents to do heavy damage

Democracy also self-contains the tools to undo itself, as long as someone can convince the majority that it's not only a good idea, but prudent to do so. That is why the transition from democracy to fascism and outright dictatorship can happen quickly.
I'd like to note that crime has deeper roots than opportunity. I think knowing who pulled the trigger does not fix the societal problems. This can be used in a good way, like you said, but I'm worried that stuff like this will give new hope to War on Drugs, premise of which is fundamentally flawed.
This is an interesting article but I wonder if jister can help me understand something.

The numbers from the WHO say Philippines had a low rate of drug addiction. So, to an outsider this looks like an extreme solution to a problem that doesn't exist.

What is going on? Why were voters so concerned about drugs they voted for desperate measures? Is there more drugs than the stats show?

People talked about voting for him because they wanted change. A satisfied voter doesn't vote for ectreme change. What are voters so unsatisfied about?
> The list of "San Francisco" neighborhoods being searched are almost all more than 1.2 miles from BART. I'm sure it's hard to find an apartment if you have a robot excluding nearly all listings.

They only filtered by BART distance for the listings outside San Francisco: "Priya and I knew we’d both be traveling to San Francisco a lot, so we wanted to live near public transit if we weren’t going to be [in] SF."
You can run android apps.
I've been going to US tech conferences yearly in the last few years. As of 2016 this has stopped, since the fact that I was snowboarding in Iran in 2011 now means I can't get a visa through ESTA. I now have to take a day off work, fly to Oslo, talk to someone at the US embassy, in order to get a visa.

It's just not worth the effort at that point.
> Back in the bad old days of Linux, you could
> easily damage your monitor with the wrong
> xorg.conf settings.

Nit: Back in the old days of Linux there was no xorg.conf, it was called XF86Config
Very nice! Check this out: https://youtu.be/G2kx1aFpT6M?t=28m

BTW, TLA+ also compiles to Z3 (and other solvers: CVC3, Yices, Zenon).
Z3 (as well as other SMT solvers) is used by TLA+ (also MSR)
Show HN: A playbook for getting started with Node.js
How have I not heard of this event? Sounds similar to (and less dangerous than) cheese rolling.
Also you can be a good writer by knowing grammar intuitively and not being able to explain the formal rules.
I think that's just a matter of priorities and lifestyle. SF is an odd city in that there are some super residential, almost suburban, neighborhoods inside the city limits. I think it's personally reasonable to disqualify a neighborhood if it's not near one that you expect to hang out a lot in. I certainly don't mean to disparage any of the neighborhoods you mention, but I spend most of my time in the northeastern quadrant of SF, and love to walk everywhere, so those neighborhoods would be out of the question for someone like me.

If I were a little more amenable to driving/riding, I could easily see myself living in a quieter neighborhood, given that I certainly value the ability to have a quiet(er) place to live and sleep soundly!
> A surveillance society could eliminate almost all crime, or at least serious crimes. Even just reducing them significantly would have enormous economic and social impact.

I wanted to be on your side, I really did, until I came to this paragraph.

From my point of view "crime" is an intrinsic part of our species, doing bad things is one of the things that make us humans. I'm not condoning rapes nor murders, it's just that, if you look at the history of our species, you'd realize that we are where we are (we've sent people to the Moon and discovered planets from galaxies far, far away) also because we did "bad" stuff.

Take the Bible, a book that has had a profound effect on the "Western" civilization. The story of Cain and Abel is one of the most important from the Old Testament. The New Testament is also a "Chronicle of a Crime Foretold", to paraphrase Garcia Marquez.

Or Homer's The Iliad, the book that defined the Greek-Roman antiquity. It's full of murders and rapes and bad things.

Long story short, we wouldn't have had the "enormous economic and social impact" that we have today as a species if, let's say, an omnipotent God/Spaghetti Flying Monster would have just watched us from the very beginning and would have prevented us from doing any crimes.
In the famous Saudi videos (there are hundreds of them), the wheels that lose traction completely stop. See https://www.youtube.com/watch?v=MQm5BnhTBEQ
There is lot of artists which are not popular at all. Moreover, some of them are so worse, that nobody will listen them even when they are paid. They are still spending resources to record their crap. Are you sure that piracy will stop them?
Watch that youtube link in my sibling comment first, but I actually wanted to take a crack at an answer. What's the change in mass, ∆m, as the star cools? We'll assume the mass of the neutron star is 1.5 solar masses.

E = mc^2
∆m = ∆E/c^2

So really, what's ∆E? A hyper hand-wavy estimate:

∆E = Q = mc∆T (c being specific heat)

Specific heat by mass is really hard to predict, but by moles it is fairly constant, well within an order of magnitude. So we'll discuss mass in moles.

m = neutron star moles
m = (mass of neutron star / mass of neutron) / Avogadro's #
m = 2.9580163e33 mol

c = 24 J / (mol * K)

∆T = 1e12 K - 1e6 K

→

∆E = 24 * 2.9580163e33 * (1e12 - 1e6) J = 7.0991681e45 J

Substituting that back into the original, as a neutron star cools:

∆m = 7.0991681e45 J / c^2 = 7.89888982e28 kg

Which is like 2.6% of the mass of the original star, so a pretty solid chunk. But that number is pulled out of my ass—I am not a physicist.

But there are even more weird effects going on, due to the warping of gravity the mass of neutron stars can be up to 20% less than you'd expect based on its baryonic (neutron) constituents (questions 4 and 7):

https://www.astro.umd.edu/~miller/teaching/questions/neutron...
I think Culture-style benign dictatorship is a better system than democracy, but hadn't been practised yet. As currently practised, democracy tends towards bureaucracy and short-term thinking (projects small enough to fit in a term).
There is fields of programming and languages that actually require zero knowledge in mathematics.
Technically impressive or not, I think what he built is super useful, and it's a testament to his skill, foresight, and charity to build it in a way that is configurable and reusable by others. My plan is to live in my current apartment until I decide to buy something, but if I end up looking for another rental, I'd likely dust this off and use it.
Hi guys!

I'm the creator of the Node.js Playbook. I'm looking for feedback and help into fleshing this out further.

I've wasted a lot of time researching basic things and trying to choose between popular yet nearly identical packages.

I'm putting all those things into a playbook that focuses on getting you started. It's not a be all and end all, it purely focuses on getting you started with a basic stack of choices that suit most applications.
Another interesting place, though not nearly as isolated, is Lukomir, Bosnia. It was remote enough during the Yugoslavian war that the war never really made it up there (though there was little reason to probably).

You have to drive an hour and a half from Sarajevo to a small village. From there, Lukomir is another six miles up into the hills at ~2,500 meters elevation. You can now drive up there, but I strongly recommend hiking: you will feel like the IceMan walking around Europe 5,000 years ago, at least I did.

The people there live very simple lives, as you can imagine: shepherding livestock during the day in the surrounding hills, mostly sheep, for instance.

On top of this is the fact that the village is on the edge of a canyon, so has spectacular views from a cliff next to it.

If you're ever in Sarajevo you should check Lukomir out!
Not with the open source release. The translator was never open.
Thank you! I just removed the double post. =)
Cool! Thanks for the tip!
I don't think even a phone as common as the Nexus 5 has drivers in OpenBSD.
There is a much steeper learning curve for WPF, if all you are doing is a simple front end to a command line WinForms is a very easy way to get started.
WinForms is a pretty thin layer over win32, it isn't going to suddenly stop working.
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2nd and 3rd, please.

We are 40+ years olds, coming from the text terminals era, so emojis is really just some cutesy-girly thing that teenagers use :)
Also, the way you describe mathematics can sometimes look like contemporary art (here, I think to Fluxus for example).

For me saying programming is tied to maths mostly is not a good thing: you'll be a better programmer if you studied linguistics, art, sociology and gender studies around your math classes.

Historically, programing has mostly been teached to science students but as we are currently talking about it, it will change maybe.
I disagree with that sentiment. As a citizen, I'd like the government to work on my behalf as efficiently as possible and to not work at all otherwise.

So I think the real issue is that there is almost no control or transparency regarding what agencies like FBI or DHS do with the data. This should change. Once there is actual oversight (and no rubber-stamp court) I'll give them the permitted data as efficiently as possible.

Going the other way - allowing them full and uncontrolled access provided they just jump through a few arbitrary hoops to get the data - seems to me would only muddy the waters and increase costs without providing any actual advantage to the citizens.
You are familiar with the concept of a lie?
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What "other languages" are you referring to? I've done a lot of US travel forms, and never saw one not in english (with the occasional spanish subs). Also I just browsed the whole 94W site and haven't found a trace of other languages besides single instructions.

I think supoort for other languages cannot ever justify significant price in US governmental affairs.
OpenBSD is simply a lot better designed than Linux, free from fancy bells and whistles. As the the world's simplest and most secure Unix-like OS, any mobile OS choosing it over Linux would have a significant advantage.

Android has bits and pieces of it, but not nearly enough.

Creator of the world's most used SSH implementation OpenSSH, the world's most elegant firewall PF, the world's most elegant mail server OpenSMTPD, the OpenSSL rewrite LibreSSL, and the NTP rewrite OpenNTPD. OpenBSD -- the cleanest kernel, the cleanest userland and the cleanest configuration syntax.
I'm actually really impressed by what they're doing there, I've never heard of a government agency doing anything quite like it before.

All legislation, regulations and bureaucratic procedures have negative externalities just by virtue of existing. Each little piece makes it just that much harder for someone to find what they're looking for, or makes a process take a little bit more time, or makes it take a little bit more effort to learn the entire thing.

Individually, the marginal cost of each little piece is small, and they're generally introduced for good reasons, but the end result of bloated legal codes, regulatory frameworks and "red tape" is undeniable. For example, "ignorance of the law is no defence", but how many people know the entire legal code? (Answer: nobody)

But what they're doing here is attempting to quantify the externalities, and crucially: taking into account that a tiny cost spread among a large number of people can produce a substantial cost in absolute terms. People are bad at doing this intuitively due to scope insensitivity, and the only real solution is to estimate actual numbers for the number of people affected, the amount of time it costs, and the value of their time, and then multiply them together to come up with a hard number.

And that's exactly what's been done here. You could perhaps quibble about the exact figures, and there are probably other more intangible and difficult to quantify externalities that haven't been taken into consideration, but other than that it's essentially a flawless application of utilitarian ethics.

Frankly, I find that utterly astonishing.

I am guessing that doing this sort of analysis is required by some sort of rules or regulation, and I would love to know when this was introduced, by whom it was introduced, and at what scope this requirement exists. Is this now a requirement for all changes to rules affecting the public by US Federal agencies?
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Anecdote: I know a UK academic who is world-leading in their field and refuses to travel to the US for this reason, has done so for at least a decade.
You're both right. The SEC has been more aggressively prosecuting and trying to stretch the definitions, while the courts have been reigning them in somewhat in turn. Tread carefully. A lot could change if the court gets packed with progressives legislating from the bench in the next few years, as will likely happen.
So not having Facebook is now officially suspicious?
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Thing to consider is when you compare costs you need to compare against the alternative sources at the particular point and time where solar power is injected.

A lot of times you see solar prices compared with base load power prices, but solar competes actually with natural gas[1] fired peaking plants which sell power at higher prices than a coal fired plant.

Similarly residential users are charged a substantially higher price for electricity than the base load price. Partly because a substantial amount of power comes from peaking plants and because the utilities have a grid to maintain[2].

[1] If you wonder why the Koch brothers hate solar remember they are in both the oil industry and the gas industry. Little of the former is used for power generation where peaking plants use lots of natural gas.

[2] Utilities hate roof top solar because it messes with their economics because their bond payments and maintenance costs are fixed.
Anyone want to do speed comparisons with https://forum.dlang.org/? (the other forum known for being ridiculously quick)

Note that the running version of this code is at http://board.asm32.info.
Great story. It somehow makes me think of the honored forest people from "Nausicaa of the Valley of Wind".
The same melodic sequence appears in a surprising number of recent pop songs
On "Can't forget articles"

I really wish there was a curated Hacker News archive.

I encounter so many new things which are exciting, thought provoking and amazing stuff on HN.

Or if they would extend HN with a Categories section.
Your comment has exactly zero relevance to the topic here though.
When I was searching for a flat in Berlin I wrote a bot that would continuously crawl EBay small ads and look for suitable apartments (based on surface, neighborhood, price, ...). When finding a compatible one, it would write to the poster and if a phone number was given send it to me via Slack. I would then always be the first person to call or write, and this helped me to find a really nice flat within just three weeks. The hardest part was pretending to have read the ad when people called me back after my bot wrote them, or explain how I could already call them when their ad was online only for a few seconds :D

Here's the code btw:

https://gist.github.com/adewes/c9b2a71457c6c6f01f2f
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What rights did he retain as the author? Could he/you have published it in a different place?