skysight-inc/HackerNews huggingface dataset:
> 20 Hz is totally unusable for navigation.

What? I've seen lots of autonomous robots that operate at 10 Hz, including mission critical systems for the military. Compared to cameras, which might operate as fast as 60 Hz (but are far more likely to operate at 30 Hz or a fraction thereof) I am confused where you're getting these numbers from. Do you have any citations?
Probably even worse in a place like Manhattan. Tuning the "aggressiveness" setting so that you hit the right balance for a given situation between making forward progress, not blocking the grid, avoiding all the pedestrians who jaywalk (including myself) as soon as there's an opening, etc. seems like a really tough problem.
Half the population not basicly proficient in math is a sign of weak education and shouldnt be dismissed with left hand.
Overcome the sense of helplessness in 2 steps
HN title is editorialized inappropriately from source (and focus shifted to absolute results rather than trends and discussion of the reasons behind the trends, which include questions about the validity of the tests.) The source title is “2017 California school test scores: Why are they flatlining?”
> There is tons of waste in government, I think we know that. But, politicians will add more - so long as it gets them votes. Interestingly, in this case, the guy campaigned on prosperity for the local economy. The project must not disrupt local business. Got to make money, after all. Yet, it slowed the project down and probably added a good 10% to the overall budget. The lengths we went to were absurd.

Contrast that to the Canada line in Vancouver, which was built using a cut-and-cover method. All the business owners in the Cambie corridor were convinced that this would be a minimal disruption to their business.

By the time construction was done, every single merchant along the corridor went out of business. Strangely enough, cut-and-cover proposals for more subway lines in Vancouver are as dead as a Monty Python parrot.
Buy vs. build is really now vs. later
The real problem is tests and goals changing every year... Constant changes to curriculum and learning goals cause nothing but confusion.
Or the process by which they design and score the test isn't very good.
The amount of calculation necessary to add a block to the chain is not undoable by someone with modest resources.

What's difficult is doing it as quickly as Bitcoin miners with specialized hardware and big energy footprints.

You can make a new blockchain add got Bitcoin today on EC2 without overwhelming expense. Even 30 of them. No problem! It'd take too long to be practical for mining, but that's not the senario we are discussing

Would you beat other miners in? Absolutely not. But the scenario being discussed here is the historical value of blockchains once there is no mining pool racing on them.

And the answer both the article and I propose is: "It is almost none" compared to the other cryptographic tokens. Especially if the chain isn't receiving constant, small commits.
It is true that international texting is expensive in Europe, whereas inter-state texting is free in US. But while Americans usually have circles of friends spread over several states, an international circle of friends is less common in Europe.

I think the reason is that a typical cell phone plan in Europe was like 5€ per month, plus 0.07 cents per text (or call minute). Whereas typical American plan was $50 month, but unlimited free text and calls. So people who text lot didn't want to pay even for the tiny amounts for individual text messages, and migrated to using apps.

The all-inclusive fixed price monthly plans are only now getting more popular in Europe.
I feel like the cultures that "praise and reward academic acheivement" are mostly the same cultures that value the concept of castes/genetic nobility (i.e. the idea that you can come from a "smart family", and the automatic association of a "noble" birth with inborn intelligence.)

America, in trying to promote the idea that anyone can become anything, has quite thoroughly quashed the idea that it is of any benefit to come from a "cultured" background; and, thereby, has devalued the concept of acquiring a Liberal Arts education as a necessary stepping stone in dynasty-building.

There are probably benefits to this, but there are also obvious drawbacks.
It may have been dumb to you but what does that matter? The point of capitalism is that it's not anyone else's business. Things you may buy may be considered dumb to another. It doesn't matter in a free market where everyone decides for themselves and has their own reasons for what they buy. If it wasted money, that is on the people who invested in it.
So what's your recommended alternative metric? I don't doubt there is a good case to improve certain standardized tests, but that doesn't mean there isn't a valuable correlation even in a flawed one, nor that it's better to keep moving the goal posts into more subjective territory to explain away bad outcomes.
Agree, super cool.

I get hung up on strange addition in pricing.

1 for 69

2 for 99 = 69 + 30

3 for 129 = 69 + 30 * 2

10 for 430 = 129 * 3 + 30 + 13

69 + 30 * 9 = 339 != 430
Twitter shuts down Blackburn campaign announcement video
Agree that the title should be edited.

Still, the question of "why are the schools in and around Silicon Valley doing so poorly?" is worth discussing. We [residents of supposedly the most innovative region on the planet] should be able to solve these problems, and yet we either are unable to or haven't tried very hard.
The wealthiest members of our society are on one hand sending their children to expensive private schools, specifically to avoid exposing them to computers in the classroom, while on the other hand lobbying for increased usage of computing in public education to support their businesses. This is a completely valid concern, and you are dismissing it without reason.
This despite soaring CA tax revenues.
Things that were described confidently for centuries (or less):

1. The earth is flat.
2. The sun revolves around the earth.
3. Fire is an element.
4. They have chemical/nuclear weapons.
5. No one can enter the search market; AltaVista owns the market.
6. Pets.com can't fail - look at who is invested and how big is the market.
7. Noone will ever need more than 640K of ram.
8. There is a world market for maybe 5 computers.

etc. Who cares how solid the consensus is - what matters is facts and truth.
Why is Portugal’s economy so sluggish?
And yet...

https://calmatters.org/articles/how-much-has-californias-edu...

(Seems that per student spending is up almost 50% over the past 5 years.)

ETA - Not to mention that (with the exception of 1 year in the past 50 years), K-12 education receives a larger portion of the CA general fund than it ever has (currently 42% of the state budget goes to K-12 education - and rising). As state tax revenues go up (as another poster suggests), K-12 education spending goes up at an even faster rate.

https://www.universityofcalifornia.edu/infocenter/california...

I think the real world data paints a much different picture than you want to believe.
When it stops being short-term profitable (in the forms of money or power) to systemically suppress intellectualism.
From creating an AI perspective - they are actually pretty similar games! All the elements are there, the end goal is mostly the same, the constraints on the systems are not all too different...
I know people who bought the Juicero so how do you know it didn't have the potential to make money? That is a gamble that is up to investors to decide. A niche product can still be very profitable.
"This is the most important sentence in the article. It points to a problem in the test itself - California's students didn't just get magically stupider."

Yes. Having gone through public education in California the tests were treated as a total joke. They had no weight to your grades and there was zero incentive to do well. Often you wouldn't even get the results. In elementary school it was common for a teacher to say "When you have finished with this test, you can go to lunch" -- well kids would just start filling in bubbles. These tests were also accompanied by a sheet to see if you have tried drugs or sex all anonymous. My entire 3rd grade class did heroin.
These don’t include private schools, right?
Big con for me: scrolling sucks. Even o latest 2.x, which is indeed better, but still light years away from native.
They're mentioned in the article. Graduation rates, college acceptance, stuff like that. Some of the countries with the best education systems in the world don't have these kinds of standardized tests.

Also, nobody's suggesting moving the goal posts to explain away bad outcomes. If every school suddenly loses three points on average from one year to another on what is supposed to be the same test, the only common variable there is the test itself. The test HAS to be different from year to year in order not to repeat questions, but it HAS to remain a comparable difficulty.
Dangers of CSV Injection
> Most of the hispanics whose families arrived in California before the English speakers arrived have long since become native English speakers.

That's true of most Californios, sure, but they are, by far, a minority of California Hispanics, who are mostly from families that immigrated much more recently.
Scale the Relational Database with NewSQL
An amazing short story. A lot of the themes can be found in other of Lems books. If you haven't picked up Solaris yet you really should. It is a great book, and probably the best sci-fi book I've read. Of course there's also his silly short stories 'The Cyberiad' where the stupidest thinking robot appears.
True, so is there a listening sub-component of the English Language Arts exam? How has that been trending?
20Hz refers to a single point measurement, as this is (to the best of my knowledge) a 1D LIDAR. Every 45 ms you make a single range measurement. You still need to scan the sensor head to image your scene. Though as the parent comment mentions, it may have gotten lost in the noise somewhere. There's no way GM is using this as a 1D sensor on a car.
When was this? I graduated high school in 2002 and felt like the tests were taken fairly seriously.

I went to school in Marin, though, so I don't know how that compares to anywhere else.
Women who had high-level roles in breaking codes
I’m sorry, I didn’t catch that the first time.

Yeah. Many levels of creepyness there.
It was already too late that MS embrace opensource and made their IDE(Visual Studio) for free. Developers who can't afford it already moved on and used free and opensource alternatives and then start to love it without looking back at MS stuff. They then realize that MS technologies are not the only cool tools and programming languages to write applications with and make money.
Restaurants have god awful tech. My initial reaction when they force me to order direct for delivery is to find another restaurant.

Explains to me why GrubHub and the like have been able to turn revenue in this space.
There's some passing information about charter schools in the article.
They should check their OS's privacy policy, this has become a normal behavior for a machine in 2017.
You can’t get rid of the requirement that this data be kept around. Either you implicitly have the validators keep it, which is what I assumed for simplicity, or you have the spender provide a Merkle proof, the generation of which requires access to that data set that scaled linearly with the entire block chain history. On the face of it this is a bad trade off because signers often need to be low power mobile or tamper resistant devices with limited bandwidth, whereas full validation nodes have access to high powered servers on low latency networks. A middle ground is to have a third party archivist maintain these records and provide proofs for a fee. That’s fine until running one of these becomes beyond the reach of individuals or scrappy organizations, as them you’ve introduced de facto centralized gateways.

This Merkle tree commitment approach is basically what zerocoin and zcash do — except with fancy zero knowledge proofs to achieve full cryptographic anonymity. But to make those proofs you still need the data...
A large portion of students do not get parental help with homework. Their parents aren't around, or don't actively participate in their lives. And that certainly means they won't pay for after school tutoring. Those are the kids most in need of systemic reform, not those who have parents that value education, where their only problem is just the schools themselves sucking. They will almost always succeed as long as their parents support them (and given enough income more likely than not move them into charter school or some other option).
> Still, the question of "why are the schools in and around Silicon Valley doing so poorly?" is worth discussing.

It probably is but California is, by population or number of schools, mostly “in and around Los Angeles”, not “in and around Silicon Valley.”
From the same article –

> According to Education Week’s annual state rankings on K-12 education spending, California was last in per-pupil when adjusted for regional cost differences in 2011. It moved up to 41st for 2013.
How Trading Rules Are Your Path to Trading Success
Love the idea of applying statistical techniques typically used in field x to data from field y.

I'm always seeing places to apply manufacturing process control statistics like control charting [0] and process capability index [1] 'in the wild'.

[0] https://en.m.wikipedia.org/wiki/Control_chart
[1] https://en.m.wikipedia.org/wiki/Process_capability_index
Redux-connect-standalone – Use redux in react, without a single root Provider
Graduation rate strikes me as a dangerous metric because it could easily be maximized by lowering the bar. We want to graduate as many students as possible but we should not compromise quality to do so. It seems to me we need metrics on both.

I do admit to not knowing what I am talking about so maybe there is no danger in using the graduation rate metric.
Fail early, fail often. The article was lame. I encourage the FB team to keep going. No one cares if you fail - we just care if you win. Go Gadget Go!
Your MVP could be applying to YC with an intentionally bad idea.
Wha.... what if you ARE a reporter?
I'm not one to complain about downvotes but I am interested in knowing why because, unless this article is mistaken, it's pretty clear that this portrayal of media consolidation by a handful of corporations is accurate.
Also German, for a short but meaningful period of time at least. Most of modern physics was originally published in German, for example.
I would argue that cultural influences do play a major role. Asian Americans on average make nearly $20k/yr more than whites. Almost 20% of billionaires are Jewish[1]. Those kinds of discrepancies don't come from nowhere, and absolutely show that upbringing and culture have a massive effect on future growth and goal attainment.

Now look at popular US culture nowadays. People are told they can be whatever they want to be, and losers are given participation trophies. Comfort and inclusion is seen as more important than competition and self-control. Our culture is changing massively, and it's showing in our test scores.

[1] https://skeptics.stackexchange.com/questions/36760/were-48-o...
then don't report on posts
Isn't this game all about patents?
They might if you worked in the CDC, with sensitive stuff.
Anything that runs on arm + wayland basically.
A bit more digging suggests it may be per frame:

https://www.strobeinc.com/strobe-lidar/

> Number of pixels and field of view is controllable in real time to 'zoom' the resolution.

and the IEEE quote is a bit ambiguous (emphasis mine):

> An image on Strobe’s website seems to suggest that the lidar will be much smaller too, with a footprint as small as an American quarter. A number of these would be needed to generate the 360-degree coverage provided by the rotating, roof-mounted lidars seen on many experimental self-driving cars today.

Needing several implies a fixed field of view, but that could be either 1D or 2D. Given the size of the device (a US quarter apparently) it could be an area imaging device, but that would imply a pretty big improvement in optical technology to get enough signal-to-noise per pixel. I know they claim FMCW requires less sensitive detectors, but there's a limit.
The biggest pitfall on a project you work on with other people is how much it tempts you to just put all the behaviors into the code-behind of the form.
I'm ok with this. Nextdoor is the only social media I use. Regardless of what they do with collected data, I much appreciate posts and profiles being local and reach user determined. I appreciate you can't use it to stalk people ala Facebook. Users should not be sharing posts to a wider audience than the user requested.
Chrome just needs to change the UI for this feature. It should mimic the way a blocked pop-up is displayed - just a small icon in the right side of the address bar. That makes it easy to ignore but you can still find it for instances where you actually want to allow it (e.g. Google Calendar nofitications)
Out of curiosity I went to look at the pricing for Amazon’s CloudHSM service for AWS and nearly spit out my drink. $5,000 up front cost per device and $1.88/hr and they suggest running two for high availability. At those prices I don’t think you’ll see this catch on anytime soon.
The point was that being displayed on my screen doesn't mean I read it. For instance, I have a problem where sometimes I'll log in to my phone and an app will be active. I don't want that app; I need to do a bank transaction. But now someone thinks their message has been read, when so far from reading it I don't even know it exists! It was just displayed on my screen for half a moment when my eyes and my attention was somewhere else. (Another common problem I have is when I send a message, and then they reply so fast that the message arrives at about the same time as I'm trying to return to the homescreen to ensure I get a notification when the message arrives. Well unfortunately the message arrived first, got marked as read and no notification exists. After twenty minutes I realise what happens but maybe I've already offended someone by "reading" their message and ignoring it.)

Delivered vs read is only accurate if you have an eye tracker.
Not to be facetious, but what if it's in the public interest?
It is ridiculous that they are doubling down on their "private social network" nonsense rather than admitting to users that whatever they post there is ALWAYS going to be public.
I still have a 52x drive in an old PC. It will always take about 5 seconds to spin to max (sounding like a jet takeoff), even if a single sector needs to be read from it.
It's organized as the most likely papers that you'd read in a graduate level database seminar. Readings in Computer Architecture is the same.
Sure. That was 2011, at the bottom of the recession - at which point CA's school funding was at the bottom of a dip. As the article also showed (& as you pointed out), its ranking improved dramatically in 2013. Since then, the per pupil spending has risen ~25%.

Regardless,

rather than more taxes going towards education there are budget cuts year after year.

...I just thought it important to point out that this statement is demonstrably false. Let's operate in the world of facts, not in the world of what "feels right." Only by doing that can we actually come to a solution that might work.
I was somewhat sad when this wasn't covered by main stream media. So I'm glad they are fixing that.
We recently developed/deployed a simple “crypto as a service” API for other apps/services to use for easy encrypting, integrity protecting, etc. It was originally developed with an HSM and eventually decided to redo it without. There were lots of unanswered questions with the HSM in terms of having the operational experience to know how they would scale across data centers, how well replication would work, how well failovers would work, etc. We had much stronger confidence in a plain old golang service, MySQL, and leveraging Vault as a master key issuer. We basically key wrap/integrity protect everything in the DB and present a simple Grpc interface. An HSM would have been nice, but a small/simple service isolated from other systems largely gets us what we want, and with the confidence to scale it as we would any other application.
Oh you’re free to report on it. You’re just not free to keep using the site afterwards. Their club, their rules.
Or you can just use a monthly reminder in Google Calendar. Update this reminder with all the rejections you receive.
Then accept the consequences of being kicked off of a privately-owned website?
Gigster (on-demand developer teams) is hiring sales engineers
It happens that SC2 implements certain micro AI functions for the game player, however, that doesn't stop a player from micro-ing all the units themselves, just like in SC1.

The number of units in SC2 make it much harder to micro for humans, hence the game provides help. But the human player experience shouldn't define the AI player behavior; especially one that is to learn the game on it's own.

Breaking down the goals, components, and constraints of the games, I'd actually say SC1 and SC2 are pretty similar games, especially to an AI on both micro and macro levels.
Agreed, that's stupid. That's not how digital content works. The only thing that works is anonymity, which social networks of our age have forbidden on principle.

That, along with maybe bot-generated fake posts to add deniability.
Graduation rates and college acceptance were tinkered with in New York to dismal results. Educational administrators were perversely incentivized, and it has showed up in atrociously high failure of local students to test out of remedial courses in public colleges.

Just because the test mean drops does not mean the test is flawed. The educational inputs could simply have worsened, which is exactly what a reliable indicator should show.
>You’re just not free to keep using the site afterwards.

Bring me to court about that one.
> liberals

Who are you talking to?
UNIVERSITY OF HAWAII WARNS STUDENTS- “IN THE EVENT OF a NUCLEAR ATTACK”
Also check out John Baez 'In Memoriam' post https://johncarlosbaez.wordpress.com/2017/10/06/vladimir-voe...
Well it’s a free choice. You can make non look math systems that have unconditional privacy instead of unconditional inflation guarantees.
What can this do that emojis can't?
This story is so old that it's not allowed out after dark.
Well the best metric is going to be something like annual pre-tax income a decade after graduation but that will never happen so we'll just need to figure out some kind of composite metric that avoids perverse incentives.

edit: This is not an entirely serious suggestion. See later comment below.
To add, Asian and white students are ~2x the proficiency rate as black / Latino.

http://www.mercurynews.com/wp-content/uploads/2017/09/sjm-l-...
Good. That's sorta the whole point.

Not everything should be globalised and ripped apart from any private context. Frankly this is a lesson we collectively need to learn IMO.

I get that nothing can anymore completely accomplish a total sort of privacy or other perfect reduction of scope, but that as a theme does have value IMO.
Yes, we've fixed it now. The submitted title ("2017 California school test scores: fewer than HALF proficient in Math, English") was an egregious violation of HN's rules: https://news.ycombinator.com/newsguidelines.html. It even put some caps in there to boot.

Submitters: you can't use HN titles to editorialize. If you want to say what you think is important about an article, you need to do so in a comment, on a level playing field with everyone else. If you break this rule repeatedly you eventually lose submission privileges, so please don't break this rule.
I'll nitpick a bit: CRA _does_ actually support "plain HMR", just not use of React-Hot-Loader. I wrote a post that clarifies the difference between the two: http://blog.isquaredsoftware.com/2017/08/blogged-answers-web... .