skysight-inc/HackerNews huggingface dataset:
Well, not quite FPRF, but people have been using rooted Androids to build RYO-Stingray-Detectors. I'd love to see this become ubiquitous. With a nice API and some Google map-fu you could crowd-source a real-time nationwide map of Stingrays in operation. Perhaps an FPRF board like this would simplify the RF side of that.
Save the whales Taking a high dive into deep learning
> Quit being a shill.

Please don't name-call on HN. It ruins one of the reasons I like it here.
I still want to know how anybody is making money off of data that doesn't have a bunch of relationships in it.
The company I work for has an Electron app and the advantage of it is that we can take our existing Node.js-powered online product and package it up for desktop/offline use with just some minimal work. We don't have to maintain two completely separate codebases.
Interesting juxtaposition - this morning I read [1] an interview at Vox.com about how IQ researchers push back that what really consistently correlates with a great diversity of what we label as success is in fact G the general intelligence quotient.

Here in this article is an interview with Anders Ericsson about his new book reaffirming his focus on deliberate practice as the key to "success" in any particular field of study or skill development.

I would love for these different groups to design studies together.

Informally, when talking with my kids I reconcile these viewpoints with a hypotheses about time-to-specific skill levels.

- Higher intelligence speeds your journey to a specific threshold of skill (fewer total hours to that threshold)

- Higher intelligence means you probably have a higher ceiling in potential skill level

- Consistent deliberate practice in the same focused direction will get you to the same place and maybe higher than someone with higher intelligence if they are not as singularly focused

- Consistent access to skilled teachers/coaches/mentors also makes a big difference (which means that socioeconomic status matters)

- Internal motivation matters because I won't keep bugging you - I might remind you and give you some external motivators at the start of the journey but in the end you need to "want it"

- Quantity of effort matters - don't get overly stuck in making one thing perfect - If you are learning to draw - draw a 100 different pictures of birds. Do them very quickly set them aside and start another one. By the end you will have captured the techniques better than if you had obsessed over every little detail and only completed 10 pictures of birds.

- If is fine to decide that journeyman level is good enough in a particular skill - especially if you are starting to develop a complementary skill - that is the world needs good multi-disciplinary generalists who can do a variety of things really well but clearly not world class at any one of them.

- Your skill ceiling is probably higher than you think.

- Getting 'really good' at something may take longer and more effort than you imagine or wish

This is how I integrate it for my kids. What do you guys think?

[1]http://www.vox.com/2016/5/25/11683192/iq-testing-intelligenc...
It would be a fixed market, not a free market.
Typically through Mello-Roos districts. It's pretty common for residents of newer developments to have an additional line item on their property tax bills. This is to service bonds that were taken out for things like new roads, schools, water, and sewage. Mello-Roos districts are pretty popular with existing residents, since they don't have to pay for new infrastructure to accommodate new residents.

From the wiki page:

>Many communities requiring new schools or other public infrastructure such as public parks and roads impose Mello-Roos taxes as an alternative to (or in addition to) impact fees paid directly by real estate developers. While real property taxes are generally levied as a percentage of the assessed value of the parcel, a Mello-Roos tax is levied independent of assessed property value (a parcel tax), and is not subject to Proposition 13 property tax rate limitations.
Yeah I suppose at this point the graph falls apart since even the prospect of writing new perl code does not sound fun to me but I am sure could be fun to someone.
I flew out of the Austin airport 2 weeks ago, and used Wingz to get a driver to drive us there. He gave me his cell # and I just texted him for the ride back home when we got back last week, and paid cash. Super easy.

I think it's pretty amazing, as an Austin resident, how fast the void is getting filled with comparable apps.
I think you're right. It's not perfect, I just gave a lowest-tech example that would be serviceable to some people with low middle-man cost.

A lot of Uber drivers aren't loyal though, they'll have both apps open in order to get fares and I think that's the end-game. Discovery services often live and die by their exclusives and if there's no viable way to force driver exclusivity, the discovery medium becomes way more important than the driver.

I'm sure I'm being naive, but I don't think Uber is all that special of a service. It handles queues, paths and estimation. Other services could out-feature it with relatively low-tech provided the regulatory overhead isn't prohibitively expensive, especially if U/L chose not to operate in a that geographic market.
I dunno, maybe they like their users to be able to play content on the web? People NOT being able to do that on Firefox would just speed up the conversations to Chrome. You know you can turn any CDM module off right?
Is having seen something used some way a leading indicator of it being a good idea to have used that thing that way?

Because I've seen Excel used as database with all kinds of macros and VBA scripts bolted-on/embedded to provide the workbook various shapes of stored-procedure and query capability... but, while sorta impressive in a "Holy crap, lol wut?" kind of way, I'm not sure any instance I observed of uses like that were actually good ideas. Full of epic cleverness and ingenuity? Definitely. A good idea? Probably not.
Not really. Although I heard Mike Acton was asked to fix Ogre3D Node class, and it resulted in a 5x speedup (in a video linked on HN).

I don't know what Ogre3D 2.0 will look like, I did not try the RC, I don't know if it's usable without a scenemanager or scenenodes. I wish it was.
"Sometimes this means writing out a loop instead of invoking an obscure function."

I can't help but think this is specifically a dig in C++'s direction. Since C++11 lambda's I've been using <algorithm> a lot more and I don't think you could get me to go back at this point... Yes I had to learn exactly what a few methods do, but now I have beautiful straight line code...
I think you're confused. _I_ am the one who said 5% and I think it's a reasonable working number. mikeash then replied, saying that Tesla will consume 22GWh (2018) and the battery market is only 35GWh/year (2013), implying that Tesla's share is so large it violates normal rules of market liquidity. Then I objected to that implication.
Snapchat Redesigns App to Shift Attention to Media Channels
Zookeeper slows down when you add nodes since quorum/consensus is larger. You can mitigate some of this with non-voting nodes (observer nodes) but only up to certain extent. So yes, a single Zookeeper cluster won't scale horizontally.

But that doesn't limit the amount of independent clusters you can have.

The reason I suggested Zookeeper is because it offers you ephemeral nodes, which is convenient to mark stuff as unavailable.
While that is true, it also goes in the other direction. How much money has been put into keeping fossil fuels cheap?

We simply don't have a free-market price in energy. I would say that in the long run the market would probably, by itself switch to renewable non-polluting energy but the governments investment has probably helped.

Governments can make really drag most markets (with a few exceptions), but they can usually kick it in the butt.
Here's the original study: http://www.pewtrusts.org/~/media/legacy/uploadedfiles/wwwpew...

Figure 3 shows that 25% of black kids who had parents in the bottom two quintiles moved up at least one quintile, while 59% of white kids who had parents in the bottom two quintiles moved up at least one quintile.

The comparison is perfectly valid. Vox is guilty of both incorrect and imprecise wording here, but not deception.
ParaText: CSV parsing at 2.5 GB per second
There probably are, but they just don't enjoy the same level of popularity as Mongo or they'd be scrutinized just as much.
Won't the next problem be the geopolitics of lithium?

I guess what drives the price of batteries is the fabrication process?
Do any of the companies have blogs or GDC talks where they discuss bits of it?
Do you have a link for this? Is it only for business accounts?
It’s useful for prototyping. When you don’t know which schema you’ll end up using having an *SQL database is tedious because you have to do migrations every time you change the schema. Once you’re done prototyping you can switch to a better alternative.
Use of MongoDB at PlanGrid is probably the single worst technical decision the company ever made.

We've migrated our largest collections to Postgres tables and our happiness with that decision increases by the day.
Yes, but production and throughput capacity, along with logistics of moving crops from the farm to a storage elevator are things that still need to be considered. Today's most advanced combines can harvest 10,000 bushels of corn per hour...you would need hundreds of robots in a field to even come close to that level of efficiency. One combine also needs about five semi-trailers driving around the clock to get all of the grain out of the field and into a storage elevator without slowing down the whole operation. Letting harvesting robots unload themselves into a truck one at a time would take weeks. There are some big changes that would need to take place to achieve what you are talking about.
The idea is, if the <attacker> doesn't have the key file, it doesn't matter what password they try, they wont get in.
The further I get away from Python the smaller that given size limit becomes. After two years? It's at about 100 lines...

To me, the power of Go's simplicity is almost always underestimated by the language's detractors. I can look at code my team wrote two years ago and with a few <leader>gd's in Vim I know what's going on. Obviously Python fails this test, but even a high-level static typed language like C# can suffer greatly from all the magic one can invoke (Linq being a great example).

What it comes down to is that Go doesn't give you many ways to be clever. Younger me who loved template metaprogramming in C++ would scoff at this statement, but if you go back and have to reverse engineer your own cleverness enough times you really, really start to dislike the practice.
PoorBloke123 gave a fine example that I expanded on with an explanation of what typically happens. I then gave a recent example of the same thing one step farther. I don't really have time or any want to read the source other than to comment that I have always enjoyed the fact they know how to use their graphic art department properly. Since, its an urban study, my only real concern is people using it to prove things about rural areas which is the 3rd in line after the first two I expanded upon.

[edit - from the I really should be doing something else department] If you based all the data from figure 3 you miss quite a few quotes about "Overall, because of the uncertainty in the estimates, the patterns do not provide a precise answer as to whether neighborhood poverty plays a substantial role in explaining black-white gaps in upward and downward mobility, nor do they attempt to account for other factors that could be driving the results. The next set of analyses address these issues.". If I were writing a summary I would have started with the ending and worked backwards because the earlier stuff is about building their case.

Given that the following figures have a lot of comments about not enough study and lack of statistical significance quoting the earlier stuff without coaching it the same language is pretty poor reporting and lessens the conclusions and build-up that Pew was very methodological about. Pew did a really fine job of answering holes with further points on the way to their conclusions. It will be interesting to see who rebuts (there is always one) and with what reasoning.

In fact, taking the study and showing someone to compare it to the article would give an actually fine comparison between a well thought out and sober, easy to understand report and a 8-bit wonder with a shallow an uneven understanding of the source material.
I totally agree with this sentiment. I think it's pretty well established at this point that in many cases clarity can trump optimization. Even more so when the optimization isn't performance based but rather line count based or "code golf" based. Also, do you happen to have a link to that berkley study? I can't seem to find it with a brief search.
Someone should finally break the rule and fire the guy who hired IBM.
The article references a mushroom body as the largest on earth [0], which is true by area. But the largest by mass is a stand of aspen trees [1]. Because aspen clones can regenerate vegetatively from their underground roots, they in some ways can be thought of as "a fungus with tree-like appendages" (I forgot where I read that, sadly).

[0] http://www.bbc.com/earth/story/20141114-the-biggest-organism...

[1] https://en.wikipedia.org/wiki/Pando_(tree)
No, for the same reason that I don't think increasing the battery supply will reduce the cost of leather seats. I do, however, think that if there were 10x as many doctors, my checkups would cost less (in both time and money) and my medical procedures would cost less.
Greylock Hackfest 2016 - Facebook HQ
Greylock Partners is proud to host our 5th annual hackfest, an epic 24-hour hackathon that will be held at Facebook's HQ on July 9 -10. For more information, please check out http://www.greylock.com/greylock-u/hackfest/. Application link: http://bit.ly/applyhackfest. Apply by 6/26 for a chance to win $10,000!
I've [had] this conversation with clients, CTO level, mostly in context of microservices. A few observations:

- Peter Principle: most decision makers are/feel technically insecure in the blog driven tech age, and cave in to direction from below. Of course, young developers want to play with shiny new things (given the general drudgery of the work involved).

- Emergence of DevOps: Engineers are being commoditized. There is an undeniable deskilling that goes hand in hand with having to wear all the technical hats. (A side glance here to pattern of deskilling of pilots in the age of fly by wire.) Sure, you will need to learn new 'tools' as 'operators', but what's the vote HN: what percent of these engineers could actually build one of these distributed systems? (To say nothing of being able to reign in the asynchronous distributed monster when it starts hitting its pain points.)

- You're not Google: I'm rather blunt when a team points to "Google does it". Google and the like have made a virtue out of necessity. Google/Facebook/Netflix/etc. had to resort to the pattern of lots of disposable commodity boxes. They also have the chops in house to field SREs that are simply not going to play machine room operator for enterprise IT.

The overwhelming majority of systems out there can run on a deployment scheme that 1:1 matches the logical diagram (x2 for fail over). And yes, it is amazing what one can do on a single laptop these days.
US$145 / kWh -- GM's late 2015 price for Volt / Bolt power -- is OK.

But the differential in price, in New England where I live, between peak and offpeak electricity, is US$0.027 (2.7 cents) per kWh. I worked it out: my investment in a battery setup at those rates would take about 17 years to pay off: far too long.

If we want this to work, we need a smart grid: a grid that can announce pricing based on current costs. Then we need baseload electricity costs (hydro, nuclear, gas, coal) to be significantly lower than peakload (fuel oil, Storm-King style pumped gravity storage) costs.

The smarts for a household energy storage system wouldn't be hard to work out IF the grid were smart enough to advertise present costs, and meters were smart enough to bill for present costs. My Power Wall could charge with cheap power and run my lights during a nasty summer brownout.

I understand they're experimenting in Europe with announcing prices using the FM radio sub channels now used to display song names. That's interesting.
Presumably whatever they are testing will work on other, similar systems over which the US military does not have control.
>This is pretty much how I see the future of agriculture.

This is how I see it. http://news.nationalgeographic.com/news/2014/07/140717-japan...
Sure, don't reply to the comments about your personal attacks re: "Emotional kneejerk comment". "Popular on reddit". Both of which smack of smugness.

You're putting words in the other person's mouth, which is what you're accusing us of. "kinda sounds". Then you put in quotes a sentence you made up hoping to add legitmacy to your remarks.
yes buffered io, you use readers to read/write small chunks at a time instead of loading everything at once. Go offers way to do both since in some cases, such as loading an entire file in memory can be fine/better/faster.
Memory issues? I have have never had any memory issues with Firefox and it's been almost crash free now for the last six releases.

It's 2016 now so maybe it's time to upgrade your box and it's 4 GB of RAM.

EDIT: How is Firefox eating up to 3Gb of RAM on your machine? I never seen mine go over 1.5GB and that's been after a week of not closing it (64-bit version/no Flash installed).
Mongo is hilarious. Ease of use is so important, we just don't much give a shit that it has all these gaping holes and flaws in it.
It's hypocrisy from banks/brokerages in general since they actually promote aggregation on their own websites. Vanguard has one, for instance - they're probably using Yodlee.
They also charge absurd prices ($10/month) for OFX access. OFX access + very simple read-only passwords would solve this whole mess of screen scraping.
in this case, please use Postgresql jsonb data tables. Just as powerful as mongo... but with the stability and guarantees of postgres
I live in a relatively new apartment building in SF; and it's fairly well isolated (against sound). I've heard people from above my floor once, and just barely; it sounded like they were moving heavy furniture, i.e. not something you do regularly. If I play music in my apartment I can barely hear it standing directly in front of my apartment's door. They're constructing a bunch more additional buildings nearby, and some of them are the wood style you reference, and others look more solid.

FWIW, even with a mostly wood based construction, you can still insulate well. It just takes the desire to do so.
There's some dirtiness and shenanigans around the whole thing too.. including the Mayor holding a secret meeting with the Uber/Lyft competitors and the City Council investing taxpayer money in them. I've dug up some of the details but more to come:

https://medium.com/@CaseySoftware/mayor-steve-adler-is-scamm...
That is a true statement. However, you should not compare car batteries (usually LiFePo, LiMn or whatever it is Tesla uses) with standard laptop batteries.

Electric car batteries can endure thousands of full cycles before their useful capacity drops down to 80%. That figure can be as high as tens of thousands, depending on who you ask.

Suprisingly, for LiMn, temperature and age have a much greater effect on lifetime than cycles.
Well, the city is a democracy, right? The state is the same?

You can just get elected, and solve it that way.

Regulation is also only useful for things you actually want regulated, and you should directly write down what it’s meant for. Regulate uninsured drivers, regulate drivers without license, prevent companies from controlling > 50% of the taxi market.

But neither banning all competition, nor just allowing uber will work.

Uber is just as bad as the existing monopoly.
At webscale
CouchDB is simple and reliable. You can understand it from day one. I can't imagine why it isn't being used.
I assume you're talking about order of magnitude increases, not just "learn to speed-read and double your touch-typing speed"?
Because postgres doesn't focus on the first-five-minutes experience the way Mongo does. Even the name is hard to say.

Mongo is a dumb, dead-end platform, but they know how important ease-of-use is.
Remember when you played SimCity, and you had those demand bars for Industry, Commercial, and Residential Zoning?

...

Of course in the real world, you can't arbitrarily bulldoze existing zones to replace them with high density residential :|
Worked, but yes I was deeply involved in that project.
Just a correction... it's only 50 MHz bandwidth (the 125 number is the sample rate). Just as an oscilloscope that's not really that good of a value, but the RedPitaya looks like it does lots of other different things, which is pretty neat.
I'm with Natrius here. The existence and use of Uber/Lyft is exactly what "fixing taxis" looks like in the USA.
FBI wants access to Internet browser history without a warrant
The most interesting aspect of this work is how it continues to try to integrate best-of-breed components for each need it has. There's a microkernel, seL4, and Muen separation kernels for most, trusted part. NOVA for a more rigorous approach to virtualization. Nitpicker GUI for reduced issues with GUI's, esp spoofing or screen-scraping. The use of POLA and strict, resource management in architecture itself. Now a port of Rust to enable already-isolated apps on a tiny kernel to be written in a safer language.

It's always tougher to do new projects this way as your team works extra hard to get everything in usable shape and integrated. The end result will have more potential for reliability or security since it's using better architecture and design. They're steadily trying to get it there with one interesting release after another.
Hooksrcipt – Run low volume Apps
Why are people so fervently pro-density?

Assuming this is a serious question and not a troll, see Edward Glaeser's The Triumph of the City, and/or my own essay, "Do millennials have a future in Seattle? Do millennials have a future in any superstar cities?" (https://jakeseliger.com/2015/09/24/do-millennials-have-a-fut...).
The CEO resigned... as close as you're going to come:

http://theloadstar.co.uk/dhl-forwarding-chief-roger-crook-qu...
Sure, but the FBI demanding warrantless access to browser history in order to fight terrorism, and expecting to get it, is a direct result of Bush administration policy.
Genuinely curious: when you say "it brings enormous benefits to a huge class of queries that are common in timeseries", what are you referring to, exactly?

I run Cassandra in production and I love its operational simplicity, scale-out design, and write performance. But I think its support for time series is perhaps over-hyped. To me, it seems the only queries you can run in Cassandra is a key lookup (partition key row get) and a column slice (partition key row get filtered by an ordered range of columns). This allows for a certain time series use case e.g. where each row represents exactly one series, and where the only thing you want to do with a series is to get its raw values. But it doesn't allow for many of the things I personally think of when I think about "time series queries", e.g. resampling, aggregates, rollups, and the like.