skysight-inc/HackerNews huggingface dataset:
The main industrial use of helium is in selling cold -- things that need to be done cold are done at liquid nitrogen temperatures. Things that need to be _really_ cold are done at liquid helium temperatures. Think superconducting magnets and MRI scanners. This usage can, should, and usually is recycled. Being a noble gas it doesn't really have much chemical applications per se. However according to wikipedia it is also used in "pressurizing and purging systems, welding, maintenance of controlled atmospheres, and leak detection." These usages are lossy by their very nature.

However helium leaks like almost nothing else. Only hydrogen is worse. It is so small that it is able to leak (slowly) through the crystal lattice structure of metals, ceramics, and other materials used to contain it. So recycling systems can't be made perfect.

And of course, even if recycling systems were perfect, a limited supply means no room for growth.
calling this a "journal" and making it anonymous is disingenuous.
Show HN: A highly customizable embeddable HTML5 free chatroom service
> I'm deeply uninterested in engaging in an internet debate about his ideas.

And yet here you are, trying to explain a rhetorical framework that you believe should be used to debate his ideas.

It is FASCINATING that you seem to be unable or unwilling to address and debate his ideas directly and have instead switched to meta debate tactics that attack his rhetorical style instead.

Again I ask you, why not debate the ideas themselves? They are the important part
I don't feel brave. I just feel happy that this conversation can be had without judgement, without trolls, without feeling badly about mentioning it.

I'm not near Regina, but your offer means a lot to me. Seriously.

Thank you.
This article gets many things wrong. First, I don't understand why they call QR codes "dreaded". They are simply a standard for communication, not unlike writing down an http:// URL in human-readable text.

> Don't look now, but QR codes have begun to creep back. They have different names now—Snap Codes and Spotify Codes and Messenger Codes and Other Things Codes—and a much improved sense of style, but the idea hasn't changed.

Snapchat ID codes and Facebook Messenger ID codes are NOT based on QR Code technology. They don't look remotely the same. My guess is that they are proprietary and have no published standard. Because of their geometry and layout, they both probably have much lower raw information density than QR codes.

What's funny is that in China QR codes are commonly called by the generic name of 二維條碼 (two-dimensional barcodes), but the Wired article makes the opposite mistake of calling every 2D barcode as "QR Code".

However, note that WeChat/Weixin/微信 2D barcodes are valid QR codes. (The picture in the middle is treated as a correctable error.)
No <title>?
Understanding the difference between private and public keys is not the whole story. Users need to know about backing these up, but they also need to know how to clear them off of their computer in the first place.

You can go as far as having your private key carved into a metal plate so it'll never get destroyed, but if a copy of it happens to still be sitting on your hard drive, your coins are still at risk. Very few people will know how to securely purge their computer of this critical data.

Even worse, the 'offline' approach in this guide means downloading random javascript from different web services that you are just meant to trust with your private key. It's a disaster.
True. A Regional battery system, with isolated grids and solar panels should be a viable system, especially since the load is known almost perfectly before hand.
Amazon Spark - a shoppable feed of stories and photos
Disclaimer: Opinions are solely my own and do not reflect my employer's
What is key re-encryption exactly?
I find it admirable although a bit concerning that there's transparency with the financial metrics. Most employees don't need to know that information, both for the company's sake and for theirs.

That information can affect the employees as they will be making plans:

- if the metrics look bad then they will make plans to jump ship, productivity will drop, word will spread or they will simply worry when it's not their job to worry about financials.

- if the metrics look good then they can expect some pay raises or benefits or improvements which might or might not be in the future plans of the company.

The company being a startup can be affected if the information leaks out. Possible investors might back out or propose some outrageous things or the competition will see inside the company also and they will be "data driving" on your back.

Financial information should be on a need to know basis.

Now back to the issue at hand about "data driven". From my experience, this means that the company will aggregate all kinds of events and data (financial, user, metrics, feedback, everything). Some of it will be for vanity (like app downloads) and some will be actionable (like where did the app downloads come from which allows you do double down on a good source).

The purpose of the "data driven" company is continuous improvement through data. Observe data, propose changes based on data, experiment (A/B testing at the minimum), observe results and carry on the cycle. For example: the UI of the application, the UX, the features offered or the price points for the features. Everything should be registered, tested and improved upon.

You said something related to engineering tickets being related to app downloads. That is a pretty huge conjecture there but if the data shows this then it must be true (!Warning: correlation does not imply causation). Recording the trend and velocity of the engineering tickets is a good metric that can be actioned upon later on. Usually the 5 why are applied to determine possible relations between events and getting to the core issue of something so you can do actions and tweaks on it (why has the number of tickets increased/decreased? etc.).

As for the monthly data/metrics talk: the "data driven" company is based on a constant 24/7 talk about the metrics and how to act upon them.

Also as for making the data requests public, the same as for the financial metrics apply (need to know basis or some kind of marketing point).
Yea last time we went back to China to visit relatives, every other person we saw in a store or restaurant was buying by using a qr code. People rented bicycles using qr codes.
Monitoring (a Rails app) in a production environment
Sounds like... "Slack Overflow" :D

(which is actually a good thing, I wish there was a hosting service with their combined strengths)
I would really like to see the names of people who are working on the research. They reference other papers and give their authors credit, but was disappointed to not see the Apple employees get credit.
The meanings of words isn't set in stone, rather they change over time. As long as people generally interpret the message close to how it was intended to be interpreted, it's fine.
>I also disagree with your assessment that anybody is subsidizing internet giants. All those players pay for the bandwidth they consume to dump their data into the network. The end-user pays for the other end of the connection. Everything is being paid for, proportionally to the usage.

I know very little about the situation, hence the naive question, that statement was based off all the websites like reddit putting up fake pay walls to show what things would be like without net neutrality.
Weathering and heavy vehicles do most of the damage that is done to roads, so increasing passenger vehicle miles won't increase wear proportionally.

I guess if shipping increases that would increase road wear. But that is also an easy to justify tax.
Feel like a “real” hacker
ISTF – Draft Informal Standard for CSS-In-JS
Our software uses QR codes for inventory tracking. They're absolutely wonderful - you can store loads of data in a format that's very easily parsed by handheld scanning devices. So much data that you can completely do away with having to call out to a central database for item information, as you do with bar codes.

QR codes are great, and I never understood why they're treated as such a joke.
Zego raises £1M to give gig-economy drivers a pay-as-you-go insurance platform
"Today, we know we can’t put magnets in the pavement everywhere for cars to follow..."

Why not?

As someone from a Midwestern state, I fear that all the self-driving car development in California is going to miss the important edge cases we experience here. Snow, plows, salt, dirt, heavy rain, etc all destroy the visibility of lane lines.

What we need is something that can be a marker for cars that doesn't require line of sight, or else self driving cars aren't going to be able to navigate at the lightest snowfall.
Ask HN: How do you approach customer validation for your business ideas?
I want to ask the HN crowd here about customer validation of online businesses, how do you approach it and what are some real world examples of hustle you have done to validate your business idea?

I have been struggling with this part of starting online bis for years. Every time the loop was similar to:Create Landing page -> Go to BetaList -> measure conversion from BetaList traffic -> Submit to similar pages -> Go to reddit -> Start contributing to related topics. etc

So after the "BetaList" phase I'm usually having difficulties to find people who would be relevant and willing to even look on the application and if my conversion rates looks bad, I usually abandon the project. But what if I just didn't find the right people to talk with? Where do you look for your targeted audience and how do you persuade to look at your product?

This question is inspired by section Customer validation from topic Things I’ve Learned from Reading IndieHackers (toomas.net)(https://news.ycombinator.com/item?id=14803468).
Fine: https://picturesofpeoplescanningqrcodes.blogspot.com/

Don't like Blogger either? https://picturesofpeoplescanningqrcodes.wordpress.com/
On the Perceived Value of EV Certs, Commercial CAs, Phishing and Let's Encrypt
That's a good point - a could top level comment could be:

"We switched from x to y. It was important because it justified rewriting the thing, which improved performance. Would have loved to rewrite it in x, but support just wasn't there."
Multiple collisions. Multiple.
I don't know how I never knew this fact, but this is pretty hilarious!
Screw poles. In sufficiently dense metro areas, microwave or similar is competitive on price and bandwidth.

This is deeply unfair to less dense areas, though. Google Fiber is shiny and alluring, but there's other solutions for us urbanites. What I'd love to see, and would make a difference, is competition for last-mile delivery _outside_ of cities.
200gbps is still quite a bit relative to everything else right now. Display port 1.4 is still only 32.4 gbps
Not discounting your argument, but HBO Now is cable-independent, so you can pay just for HBO and get Game of Thrones.
Step 1: buy a hardware wallet

Step 2: back up the seed for the hardware wallet

Step 3: send your coins to an address managed by said hardware wallet

Step 4: kick back and relax
Walled Gardens or Beautiful Fields: A Model to Become Truly Digital
> And even place bricks and plates at an angle, using Pythagorean triples or careful rotations

Can you explain this a bit more? I'm having trouble visualizing what you mean.
Thinking in terms of long-term ROI is a better way to evaluate electrification of Rail lines, rather than the upfront cost. Govt's can bear such a cost and ROI on electrified rail lines should be pretty damn good.

It's not impossible. Also, there is a scope of making the whole system carbon neutral.
How many years should we wait before trusting this technology then?
The "let websites subsidize users" meme is a red herring. Net neutrality is about killing competition in the consumer sector and further consolidating the corporate multimedia monopolies.

No net neutrality = no competition in the ISP space; any new ISP has to build out a parallel network all the way to a fair ISP. Net neutrality is what guarantees that peered traffic is fairly prioritized.

My first apartment was wired and run by an 8 man startup that operated a few contiguous apartment complexes. They connected the complexes to Comcast but dealt with all the last-mile (last block?) issues... but here's the kicker, Comcast also offered services in the area. My ISP only existed because Comcast was required to fairly prioritize their traffic. Without net neutrality, that ISP's traffic would have been deprioritized by Comcast.
> I didn't assume ignorance, I observed it.

Correction: you observed that I did not mention certain facts. From that observation, you have no way of knowing whether I am ignorant of said facts or simply don't agree with you on their importance ot the issue at hand.
"Store all your messages with a random site, what could possibly go wrong?"

We don't think of it as storage - although you can indeed use it as such. We think of it as messaging. Oh By gives you a way to send messages to unknown people at unknown future dates which don't require any special tooling (apps) to decode.

You can just take a piece of chalk and write your message on the sidewalk.

As for longevity, I think we have a good track record having run rsync.net for 16 years now.
> I don't know anyone who actually finds the answer via SO search.

I had to load up the site just to look where the search box even was. Not that it is hidden by any means, just that my eyes follow google -> topic title -> green arrow -> scan other solutions/comments and I had no mental reference of their search bar in my head
What is the output? Could you build 3D models with "virtual legos" and 3D print them easily?
Of course, but that's not the alternative to what you propose.
There isn't. PSP/IME can modify any software's code or data at any time.
https://en.wikipedia.org/wiki/Kessler_syndrome
I bet we first hear about ML shining at generating malicious code obfuscated as legit.
If I understand it correctly, it means that keys derived from such a prime number (such as via DH Key Exchange) can be factored and messages decrypted in a reasonable amount of time, where reasonable is less than a day.

I welcome correction.

EDIT: Time squeezed per tptacek, computation space reference removed per schoen.
I'm completely baffled why people care where others go potty. But then I'm also baffled by the fixation we have on sex separated public facilities. If it were up to be, we'd have a large unisex facility and one or two individual + family restrooms. That's it. Take your pick, but it's not separated by sex.

Transgendered have been using the facility of their choice for decades with no problems.

The controversy is just a recent phenomenon, manufacturered from the right wing Christian camp. To me they are fake Christians, a pseudo Christian cult, because they are not in any meaningful way Christian, they're just jerks who want to be vindictive, and use the government to punish people whose behavior they merely disagree with but otherwise cause no harm. These cultists see the U.S. as a Christian nation under threat, and they go on the attack to assert it as being properly a white Christian nation. So in my view, they can keep trying, but their ridiculous dying culture is a losing proposition. The more vindictive they are, the more people get tired of its pointlessness, and obsolescence.

Sexual assault and lewd public behavior are already illegal. I see no reason to sanction people who are just peeing, pooping, and primping.
As a side note, the 50% dilution was not a normal dilution during funding round. No significant new money was invested into the company on that dilution.
If you use a wallet that follows the standard conventions for generating addresses (BIP32 and such) then yes.
The CS:App book he mentioned has lectures too if you click on 'old video(2015)'
https://www.cs.cmu.edu/~213/schedule.html the Bomb Lab, and Attack lab are avail on the book's site in the student section without answers, but quick googling reveals many stackexchange answers if you can't figure something out.
Bellingcat – MH17 – The Open Source Investigation, Three Years Later
QR codes are making a blip comeback mainly because people have their cameras on more for augmented reality and computer vision will be more and more used.

Before you had to actually open up an app to scan one, now you might already be in an app that is constantly scanning for AR targets, UPC, QR codes etc. In a few apps we have done that use AR for retail they look for AR targets/trackers, cloud targets, marks, UPC, qr codes, and more.

Along those lines, Vuforia AR has VuMarks[1] that are replacements for their framemarker targets (similar to QR codes) that are further on the mark detection.

With augmented experiences we'll definitely be scanning more with cameras already on in the future. So there will be more marks/scannables out there.

[1] https://library.vuforia.com/articles/Training/VuMark
QR codes are much more information-dense than 1D barcodes. Try encoding a string like "The quick brown fox jumps over the lazy dog" (43 ASCII characters) using these tools and seeing how much space they take up:

* https://www.nayuki.io/page/1d-barcode-generator-javascript

* https://www.nayuki.io/page/qr-code-generator-library
This hardware uses PowerVR GPUs (e.g. rebranded GMA500), which are no longer supported (driver updates) for Windows by both Intel and Imagination, and even on older versions of Windows (and Linux) had barely-to-non-functional drivers. These drivers already had various bugs, and on newer Windows 10 versions an additional bug is apparently 'text not rendering'.

The install base of this hardware is fairly low as the hardware already barely was usable, that it apparently wasn't deemed worth the engineering effort to work around this type of flawed driver.

Of course, this article completely ignores that information, presumably to cause typical baseless Microsoft hate.
This is a free HTML5 chatroom you can embed on your website. But it's even more than that as you can just use it to meet new people. It's a general chat service. We have chat listings for the most active/popular chats. (https://minnit.chat/discover)

It also works on mobile devices, although there is no app currently.

The following mobile OSs are supported: Android 4.0+ (using chrome browser), iOS 8.4+.
The following browsers are supported: Firefox, Chrome, IE 9+, Edge, Safari

You aren't required to register to join the chat.

It's something my friend and I created because I realized there are many websites that need a good customizable chat with strong moderation tools. We also wanted good customization for smilies.

By default there is a captcha for unregistered users joining the chat (to prevent bots), but you can turn this off or adjust who you want the captcha to be shown to.

You can control how long ranks can ban for or who can kick users out of the chat and how long the kick lasts for.(kicking means they get signed out and can't rejoin for a small period of time, like 15 seconds)

You can change what ranks can send links in the chat too to prevent spam.

You can even control how long IP bans last (don't want to ban a public hotspot for too long!)

Edit: A cool feature I forgot to mention is that we have something called "Subrooms" which automatically splits your chat into several rooms when a certain threshold of users is reached.

The best part is that your staff can move freely between rooms to moderate the chat, even if a subroom is full.

This is particularly helpful if your chat gets really busy. One thing I notice about a lot of chatrooms is that when they have a lot of users, people keep talking constantly and the conversation is really hard to follow.

By default, it's 50 users per subroom. You can adjust this amount or even turn subrooms off completely if you wish.
You can do a lot of other stuff too, but those are the main points.

You can even customize your own smilies on there and add hats, glasses etc. (more will be added later for free, and soon you'll be able to pay to get extra customizations)

Plans for later: voice chat, an application.
Show HN: A Set of Dice That Follows the Gambler's Fallacy
How poverty affects the brain
You can now get a Surface Pro with cellular service too unlike the Mac
How stress works in the human body, to make or break us
Adobe removed the need to have license afterwards
The Victim Click: The Psychology Behind Making Employees Click
I think what blew my mind most was `git bisect run`. Write a test case, go get coffee, have git spit out the offending commit automatically. So cool.
SO search never seem to find the answer I'm looking for, but once I start writing a question it almost always ends up finding a similar (answered) question. So their search works but perhaps it needs lots of input
AFAIU SGX has nothing to do with the ME. It's entirely in the CPU and MMU. SGX is more like ARM's TrustZone, except it can be utilized by multiple, independent pieces of unprivileged code. SGX is pretty slick. The only real problem is that 1) Intel has done a horrible job of educating developers, 2) Intel's PKI scheme for remotely verifying authenticity of an enclave (e.g. for DRM schemes) requires huge on-going license payments to Intel, and 3) they don't seem keen on rolling it out across their entire processor line-up. All three cases have been and will continue to be serious impediments to uptake because of the confusion they create. Those impediments are likely to keep SGX niche and underutilized.
Have you posted about this at length somewhere? If not, care to elaborate on what it took to design this system?
I should have quoted. The person I was replying to originally said that "apple won't let it's researchers publish in real journals", and then stealth-rdited their post.
For that matter, I'm sure significant amounts of people have heard about either IME or PSP and would make decisions on hardware purchases based on it.
QR codes originate from Japan.
A suppose, but the point of the analysis is that one edge of the sword is pretty dull.

The point being that even in the extremely, vastly unlikely case that things would progress to an actual patent infringement suit that you lose, in the end, it may not matter, based on:

And even if Facebook could assert a valid patent protecting React, the damages are very speculative. I cannot find a case awarding a judgement for infringing a patent otherwise licensed through open source, but it’s not a case I’d want to file. “Hey Juror #2, please award my client Facebook money because we pulled a patent license that’s otherwise granted to millions of other people free of charge.”
I thought that was going to be about Bayesian methods:

http://www.springer.com/de/book/9789811003783
That's my point, 80% of entrepreneurs can't make it one year, so what are the odds of Steve Jobs starting multiple multi-billion dollar companies over multiple decades, with tens of thousands of decisions, through pure luck?

You're saying that skill and knowledge play no part in success. A mentally handicapped person would have as good a chance at success as Steve Jobs by your logic, because it's all luck.
The phone that can track blood sugar level
Sure, mate, robot. And it's kind of the case: if you read the article it starts with when x in 2014 in China ... WeChat...