skysight-inc/HackerNews huggingface dataset:
Fission products have larger cross section than enriched Boron-10. It is all about concentration; that is the number of B-10 atoms per number of atoms of fuel. Here is the cross sections plot I took yesterday:
https://imgur.com/a/uWb0SAa

Robert Steinhaus' Question for fast reactor folks: "While the theoretical case for fast reactors being used to burn nuclear waste down to fission products with short half lives has been made for decades, there has in all that time not been a single demonstration of a fast reactor actually experimentally burning any significant quantity (kilograms) of separated Minor Actinides and Transuranics down to fission products to a batch completeness exceeding 90%.
The proposal of using fast reactors to treat nuclear waste has been vigorously put forward for decades.
Why do fast reactor proponents not demonstrate with one existing fast reactor the burn up of some kilograms of separated long half life Minor Actinide waste to prove the technical feasibility of fast reactors for the application of waste burning and waste treatment?"

Yes, more neutrons are released for Pu239 fast fission. In CANDU, U238 fast fission is more because 99% of fuel is U238. If we increase Pu concentration Pu fast fission happens as well. U238 fast fission is ~3% of CANDU's power. This is because all neutrons are born fast. A FFR (MSR) can adjust heterogeneity as required, because heat transfer takes place outside the core. A MSR can have thicker fuel regions and higher lattice pitch than a CANDU and exploit fast fission further.

CANDU can use straight-up SNF. Check this or search it:
http://www.iaea.org/inis/collection/NCLCollectionStore/_Publ...

"These things aren't like the F-22 or whatever, requiring active systems to stay in the air."
That is exactly how pressuriser in a PWR works. A control system loop with Temp & pressure sensors with heater and water injection. Almost all reactors are directly synced with grid, reactors will participate in tiny load adjustments and there is also cooling water temperature variations in a day.

MSRs can be isolated from the power conversion using a thermal salt reserve. That is called inherent safety. Water temperature variations or frequency control wont hit the reactor.

Even if MSR is connected to grid directly, there is no DNB control, the boiling point margin is high. If Xenon is removed with >90% efficiency, -ve reactivity can take care of leftover xenon as well, no control rod circus for MSR till a xenon equilibrium is attained.
Boeing did inform them.

Boeing did not inform any of the airlines of MCAS until after the Lion Air crash.

Otherwise how would the third pilot have known what to do when he saved the plane?

The deadheading pilot recognized a problem with something controlling the stabilizer and went off script.

Edit: I love the downvotes from folks who haven't actually read any of the complaints from pilots. Since reading is too hard, have a video from the Washington Post:

https://www.youtube.com/watch?v=ftZ6j8onS78
To answer my own question, as per the FAQ:

Volk Fi counts data usage and bytes shared via WiFi. Every user gets the amount they share, unlimited. If a Volk user consumes more data than they share in a month, there is a 5GB data cap. After that, the user can pay the super cheap price of $1/GB for additional data.
We added "on the" to try to make that clearer above.
If you're actually planning to continue doing this with this particular distribution it would behoove you to locate and acquire a small cache of relatively cheap, supported wifi dongles. The cost is so small it makes no sense when you're already investing significant time on this.

Offer to sell them the supported dongle at cost if they're super into what you're demonstrating. You'll probably find yourself profiting a little accidentally when they volunteer to pay you more for your time now that a transaction is happening.

I don't think it's a good idea to send them off to find supported hardware on their own, people are justifiably anxious about buying potentially incompatible computer components - but when you have it in front of them plugged in and demonstrably functioning it's a completely different story.
Yes you've played the service ? It surely sucks when no reviews are out ? Look for people who have dogfooded and raved about it.
It's one of those features that you'd think must be inherent in everything since forever but can't believe that we still don't have it by now.
this is exactly correct. i used a redfin agent and felt like he was discriminated against by the seller agents at every turn.
Exactly my point. Imprisonment should come into play when the accidents are proven to be caused by Boeing's negligence.
A purely subjective experience: Go felt tedious to write. I enjoyed writing both Python and C than Go. I don't know why writing 1000 lines of C feels more pleasant than 100 lines of Go,maybe it's all the new rules(new to me) that feel repetitive and pointless.
Several miles? Sure, maybe, if conditions are good and you're line-of-sight. Good luck turning every phone into a cellphone tower.

This seems like an overly optimistic scam.
Ok what's state of the art OR?
Would you please not break the site guidelines like this? Assuming you're right, making HN worse still is no way to go.

https://news.ycombinator.com/newsguidelines.html
Here's the relevant paragraph.

> In private industry, there is a different pattern
among workers in this occupational group: those represented
by unions earned an average of $32.95 per hour, while those
not represented by unions earned $35.70 per hour. The wage
advantage for nonunion workers in this occupational group
reflects the concentration of union workers in certain relatively
low-paying occupations in business and financial operations,
such as claims adjusters, accountants, and training specialists.
Do it if you are so passionate about the topic that you’re teaching yourself anyway but need to set aside a chunk of time to really get the momentum you want. Don’t do it if you’re hoping it will pull you out of a rut (there will be lots of boring courses and admin).

Personally I found doing a MSc in Statistics after 3 years of working to be incredibly valuable. I think part of it was it gave me permission to view myself as an expert (although you don’t really need a MSc to do that as you can tell by switching on the news lol)
These data collection scams are getting more and more elaborate.
> you don't know many facts inside China like most English reader in HN who get most misinformation on Western media

What are specific things you feel most Westerners are clearly misinformed about China?
Maybe they're bringing in one of those old-fashioned union-busting CEOs?
That's because it's going to cause frustration in users. I guarantee it.
React-control-center give you cool coding experience in Counter
> Pulling on the yoke is not how you counteract a runaway stabilizer on the 737. I've pasted the relevant part of the QRH in a few previous comments.

It is how pilots learn to counteract nose down day one of pilot training. In many aircraft hard elevation will overpower even a faulty horizontal stabilizer. If the QRH was a panacea we would have 348 fewer loses today.

> That may be what happened here, but if I'm interpreting the graphs on the preliminary report correctly I wonder about mechanical failure of some sort.

There was a mechanical failure, the AoA sensor. I'm skeptical there needs to be more going on than MCAS due to the "repeated correction" unauthorized change Boeing made.

> “The FAA believed the airplane was designed to the 0.6 limit, and that’s what the foreign regulatory authorities thought, too,” said an FAA engineer. “It makes a difference in your assessment of the hazard involved.”
> The deadheading pilot recognized a problem with something controlling the stabilizer and went off script.

It's not like he was pushing random buttons. He knew what the system was, he knew that it was likely to be the cause of the problem, and he knew how to disable it. He must have been informed about the system.
Could the grass be blown in? Leaf blowers move grass pretty easily...
I would love for this to be just an app on a standard Android device.
more easy and power than redux、mobx，just have a try...
I used Android from 2.0 to 4.4, and the phones I had performed notably better with third party launchers, suggesting the original launcher process wasn't still using system resources.
very nice. way to hack the system
If you want to learn how to do the math, this is old but a good starting point: http://www.ti.com/lit/ml/slap127/slap127.pdf

(In general, radio engineering is taught at college-level and requires some basic math/physica if you are going with “rules of thumb” and fairly advanced math if you want to understand/derive exact equations).
You could also say religious nutcases have also had very bad experiences with China.
Cloudflare cache issue breaks a lot of website
The point is presumably that partisan externalities have influenced this development, since there have already been two presidents' worth of drone strikes. And you're right that it's precisely the wrong way to make such a point on HN.
They aren't technically using just steepest descent, there is momentum, adaptive rate, stochastic pieces in the most used Adam optimizer, so it's not like it's the most basic version of gradient descent. There are also some structural rules on top, for example if one wants to model discrete variables, they create some relaxations, resembling simplex, tightened by simulated annealing, hoping by the time temperature drops to 0 the optimum is similar to the discrete optimum they wanted to find. It would be super surprising if the gradient descent by itself did all the difficult part, which we know for sure isn't because otherwise shallow fully-connected networks would be sufficient to figure out everything. Instead the whole craft nowadays consists of figuring out how to assemble certain primitive pieces together so that steepest descent actually does a good job, like how convolutions reduce searchable space considerably or embedings allow to group related terms together.
It wasn't 100% at all. If anything, I found that the only female students were the computer nerds and there were almost no "CS-curious" women enrolling.

I'd also then go on to say in my experience the student who went into a CS program for the stability and potential money "CS-curious" over passion for it might do better on scholastic tests of computer science while being less capable of actually programming well.
>Care to share how this tidbit is true?

https://store.steampowered.com/hwsurvey/Steam-Hardware-Softw...

I would say 60+% qualifies as most. On the other hand, ~25% is not negligible. So you both win ?
Could you please stop posting unsubstantive comments to Hacker News? Especially flamebait. Double especially political flamebait.

https://news.ycombinator.com/newsguidelines.html
Is there a name for this theorem? I'd be interested in reading more about it.
Tangentially related: Would there be a significance difference between a Master's major in internetworking compared to distributed computing? I got into the former but have been interested in the latter.
If you really wanted to burn your eyebrows off, you could also use a no-serialization tool like Capnproto and implement it in Rust using ArrayBuffers (fixed in Chrome) to share state between background workers and the main thread.

I think I read something about Rust having Capnproto and Emscripten compilation to web assembly these days.
I’ll offer the alternate viewpoint. My parents sold a house last year in northern Virginia. During the market peak it was around 60% above what they bought it for in 2002, but by 2018, objective market price was 25% above purchase price. My parents—having experienced the 1990-2000s housing boom—could not believe it should be on the market for less than 50% above. A good seller’s agent absolutely helped them come to a proper asking price and made the sale happen.

Most buyers and sellers are not completely rational about houses, because they’re not repeat players. There is a good argument that agents help the market stay liquid and facilitate transactions happening.
He knew what the system was

How would he know something that was undisclosed? It's not conjecture here, no airlines and no pilots knew of the presence of MCAS before the Lion Air 610 crash.
(YC '19)
What you're asking for, an explicit effort to "decommission" small towns, is in some ways also signing the death warrant on a way of life, a culture. I don't think there's a humane way to do that

The humane save people, not cultures. All the culture in the world isn't worth the suffering of a young working couple who have to live out of their car because of NIMBYism and our continuing efforts to subsidize small towns.

I think there are healthier perspectives available, with recognition that different people have different wants/needs

If more people really wanted to live in small towns, they would be expanding, not contracting. Clearly some people want to live in small towns, but many of these small towns won't be able to pay for their own hospitals and community services at some point. Some small towns will survive - after all, you seem to want to live in one. And no one is stopping you. But you are now a part of a small minority, and we need to have a plan to care for the last of the old people who live in some of these towns as they fade away.

The most unjust thing we could do is ask for young people living happily in their cities to subsidize a 'culture' they have no meaningful connection to or interest in. The real culture is where the people are, and soon that won't be small towns.
Yes, and now that average user goes: why can't I use the internet on my phone? It gives me this stupid pop up and I don't know how. Please fix it.
https://news.ycombinator.com/item?id=19437690
> It's also a shame Sun sold Java to Oracle

Worse: Oracle bought Sun.
> and went off script

From the article:

"told the crew to cut power to the motor driving the nose down, according to the people familiar, part of a checklist that all pilots are required to memorize."

Emphasis mine.
Steam's hardware survey is probably the best measure available, and puts W10 at 68% and W7 at 27%.

https://store.steampowered.com/hwsurvey/Steam-Hardware-Softw...
Yeah, and this pretending comes at the annoyance of the end-user.
>Google has an even better case as they also let users sideload apps and change defaults.

Google already lost their case; they were fined $5bn.

https://www.npr.org/2018/07/18/630030673/eu-hits-google-with...
I agree there's a bazillion different headache-inducing ways to skin this cat. I also admit to hacking around in ansible/boto to force it to do what I want, when it doesn't work. I guess I just really don't want to touch prolog.
Do you really think data is delivered to people in those countries in any sort of latency that would make a service like this remotely enjoyable to use? A massive number of people in the US don't even have internet that could support something like Stadia, let alone developing countries.

By comparison, shipping "edge devices" (aka, uh, COMPUTERS) running an 845 Snapdragon or Tegra (like the Switch) is cheap and getting cheaper. What makes more sense: asking someone in a developing country to pay $200 one time for a general purpose computer useful for everything including 1080p gaming, or $10/month in addition to, uh guess what, some computing device they'd already have to own to access Stadia.

The adage goes: never underestimate the bandwidth of a station wagon full of tapes barrelling down the highway. I mean, the follow up is usually "but never forget the latency", though in this case that doesn't apply. Point being: the internet isn't the answer to everything, but if the only tool Google has ever known is a hammer then every problem is going to look like a nail.
Sounds a bit like Fon from the 2005s.

https://en.m.wikipedia.org/wiki/Fon_(company)
Re: the survey - the type of person who remains on Windows 7 due to concerns about 10 would be more likely to opt out of the survey, or not use Steam in the first place. I would put the number for Windows 7 a little higher at maybe 30%.

I expect the number of Windows 10 players to increase as DX 12 becomes a common requirement, but we're not quite there yet.
Or they have humans who work there who see these threads and message a friend saying "hey what's going with this?"
This is very important, as it shows the ratio of pilots aware of the mitigation is low, and/or the stress of fighting with the the computer makes you forget you training amendments

Edited to add it’s a training amendment
The pilots were not trained properly on the new system

It's hard to train for something that doesn't exist according to Boeing

The plane was allowed to fly again the next day despite the malfunction

The plane was serviced between flights, and assuming that Lion Air actually did what they claimed, Lion Air maintenance followed the Boeing instructions by the book.

The incident was not reported properly at the time

The malfunction was written up in the maintenance log and the issues were addressed. Unfortunately because Boeing refused to disclose the existence of MCAS the pilots wrote it up both as what they saw (EFS non-op, IAS disagree), and if memory serves, they also suspected the one algorithm they knew about (STS)[1].

1: https://www.pprune.org/showthread.php?p=10295557
This has happened too many times to me.

I often put the phone in my pocket after a call without pressing the sleep button, so the screen stays active, causing me to unknowingly "butt dial" random numbers, sometimes talking to other people while a confused/mischievous person on the call is listening in...
Accidental clicks on white space shouldn't do anything!

They are racking up click-throughs.

Advertisers pay just as much for accidental clicks as intentional ones, so the site operator is incentivized to generate as many as possible. Being the dumbest morons ever to mo a ron, the advertisers don't understand that they're the marks in this particular con game.

Eventually they will get tired of paying for worthless clicks, but I wouldn't hold my breath.
Scarlet letter....
The problem of course is if you give your employees really good pay and benefits you price yourself out of winning any jobs.
It suggests that no LionAir crews knew how to handle this.
Doing the Enough Thing: Interview with Basecamp CEO and Founder Jason Fried
Yay he solved the puzzle. The reason that pilots train extensively is so they don't have to solve complex puzzles with terminal penalties while in the air. Most airline passengers prefer that.
Can Goats Empower Women?
> There is little funding or political will to undertake such projects.

It really sounds ludicrously obscene that the city with the highest average income per person in the world can't "afford" to do things that third world countries have done to multi-millennia old cities histories spanning much larger footprints with way more people involved and way less money in the economy.

If SF wanted to develop into the proper metropolis it should have been since the 90s there is ample money flowing through the Bay Area to pay for it. You just need the political willpower to make it happen, which may be rarer than flying pigs.
> Creating a trebuchet doesn't give you the privilege to sling projectiles at the neighboring town, right?

The difference here is that you did not create the town. It is publically created and publicly owned. Your rights and privileges ends where someone else's begins

> A government creates laws to promote the wellbeing of the populace

Yes, but it does so by creating an environment where individuals can choose for themselves what wellbeing means to them
>then maybe you should come to terms with the fact that you just aren't exceptional

lol and maybe you're just a cynical asshole
That's what the deceptive Facebook PR would lead us to believe. It's very carefully worded to give that impression, but it doesn't actually say that.

Facebook provided that specific and meaningless fact to distract us from the truly important facts that they're still hiding.

(1) How many minutes from the beginning of the livestream until the last re-uploaded copy was removed?

(2) How many Facebook users viewed even part of the livestream or any of the re-uploaded copies?

The answers are likely (1) thousands of minutes and (2) millions of views.

Naturally these two numbers are not to be found anywhere in Facebook's deceptive explanation.

Facebook let 300k people re-upload the video without being stopped at upload. Facebook pushed it to their friends, and when their friends interacted with it Facebook pushed it to friends of friends.

That fanout push to feeds isn't comparable to 8chan.
Oh god, you just reminded me of this:
http://www.thebaynet.com/articles/0309/update-bloody-tragedy...
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One thing that bothers me about this generation is this thirst for infinite punishment.

People hunger for someone to blame, rattling off a long list of maladies that should befall that person, until they have been thoroughly satisfied, but they are never satisfied. They always feel there should be someone else, something more, something deserved.

The truth is, there is no point to such a punishment here. It is unlikely that any individual plotted to kill people by pushing some faulty code out of malice. These were people simply doing their best and they failed.
For tech workers specifically a organization like the AMA that can fight for certain contractual safeguards against death marches, non competes, and abusive IP practices.

For workers in general a UBI that decreases the supply of workers thus increasing their bargaining power.
That's the point, there's no cache possible for interactive gaming sessions. It's a different architecture altogether.
Take a guess, or don't: https://github.com/systemd/systemd/commit/7286037fd438e93137...
So how does the sequestration work?
That would still be millions of users who don't have a choice.