skysight-inc/HackerNews huggingface dataset:
Having had experience with hydroponic horticulture, I believe you are correct. Successful hydroponic farming is much harder than it seems it would be.

The amount of light energy required to grow plants properly is very large and hard to supply with artificial light sources. Fruiting plants, like tomatoes, have much higher requirements than leafy crops, like lettuce. Lamps are rather inefficient converting electricity into light.

A 1000 Watt metal halide or high-pressure Na lamp is barely adequate to cover a square meter (if the only light source). Calculate the energy cost of running it 16hr/day for a month and it gives new respect for Mother Nature.

Another headache is plant nutrition. Vegetables grow fast and suck nutrients out of their environment at an alarming rate. There are many systems but the short version is reusing nutrient fluids requires constant chemical monitoring to assure proper pH, mineral content. Automated equipment is out of the question, and a home farmer very likely won't have the knowledge and lab equipment to do it optimally by hand.

There are a whole bunch of other constraints, but the above is enough said. Doing experiments is fun, but apartment-scale production of edibles is definitely no more than a pipe dream.
The "unity feel" is a well-known phenomenon (relying on pre-made components and assets too much, so that you can guess which engine was used without researching). I guess soon we will have dozens of "unreal feel" games. I hope at least the latter will be a good thing...
Four Kickstarts that prove board games are back
I'm still impressed by the fact that Dyson made a fan with no...fans.
> I will never understand what's with all the "Saga" either.

Candy Crush Saga is quite well named. Bejeweled is really just a single puzzle game but Candy Crush Saga is composed of hundreds of distinct puzzle games. These games are laid out along a winding path that takes you through themed regions. When you enter a new region the next game you encounter often introduces a new play mechanism, then most of the games in that region utilize the new feature in different ways combining with features seen in earlier regions.

So while you are playing a series of candy crushing puzzle games, you are also progressing in a long and arduous journey - a "saga", if you will - in which you constantly encounter new challenges and gradually get to see new pieces of the map/landscape.

(I'm currently on level 617 of the main screen, which means my own saga has most recently taken me into a region called "Cereal Sea". The most recently-added new play mechanisms were (1) a frog that eats appropriately-colored matching candy (and can then be forced to explode and/or relocate), (2) conveyer belts that carry candy around parts of the playing field.)
Not only the scroll wheel, but clicking on the links at the top open up a different browser tab. Why do people like playing with standard browser behaviour like that?

And best of all, the "shop" link takes you to a shop where you can't buy it...
Hmm, the WP article said that Dreadnoughtus weighed more than Boeing 737, so I was expecting it to be at least similarly sized. Was confused for a while because the 737 is much bigger in the chart.

Turns out the plane in the chart is the biggest version of the 737 series, which is nearly 50% longer and heavier than the smallest version. The weight shown in the chart (44 tonnes) is the 737-900's empty weight. When fully loaded, it can weigh up to 85 tonnes, much heavier than the Dreadnoughtus. The weight mentioned in the WP article (50 tonnes) is for a fully loaded 737-100, the oldest and smallest version.

https://en.wikipedia.org/wiki/Boeing_737#Specifications

Also, Futalognkosaurus is a really wacky name for a dinosaur! It sounds like something from the Cthulhu mythos.
As much as I like the idea that all communications should be confidential, your response doesn't refute the original poster's point, which is that any architecture that is impervious to eavesdropping would not be adopted by parties who want to impose their desire to eavesdrop on it, which is (according to the original poster) 95% of the world population (and their governments). (citation needed)
The main scalability issue with this is that the products you've found will quickly go out of stock, so as you build up a collection of outfits you'll face an increasing burden going back and checking all of the products to see if they're in stock (or risk damaging your brand).

I worked on something similar back in 2008. We were looking at ways of monetising our visual similarity engine. We could mark a set of query products for each outfit and return a selection of products that were both similar and in-stock and give the customer the option of filtering by price range or whatever.

There were some nice challenges in there, like processing gigabytes of retailer feeds as rapidly as possible looking for new items, standardising various huge feeds without using up developer time, product deduplication, image feature extraction, designing the indexing method (we ended up using the Visual Words technique with a custom distributed Lucene inverted index as Solr didn't support partitions at the time). It was a really fun project... and I've drifted far enough off topic that I'm going to finish up.

The tech was pretty solid (and replicable if you can get someone decent to do the CBIR piece) but we ran out of runway.
I don't know that they're trying to drive a wedge between IPv4 and IPv6. I would think that even NDN's supporters see it as a very long-term, post-IPv6 development.

I am surprised however to see Cisco supporting this. It's one thing to have some academic networking specialists writing papers about NDN, but for a major corporation to devote resources to a 10+ year development project with an unproven architectural basis strikes me as odd.
There is a benefit in having an id used in APIs that is difficult to iterate through sequentially or otherwise anticipate. I'm guessing the "internal" id is a surrogate key in a database, which normally wouldn't be used in other contexts.
Well, any retailer has to increase their prices by 3% to cover CC charges. Even the simple act of a place insisting on a minimum spend of X on a CC can put you in a situation to spend more than you need to.

You might not think you are paying for card fraud, but it's all priced into the products you buy.
There is such a tool here https://github.com/c0rner/scripts/blob/master/tmux_save
5 killer features of Android Studio
Definitely. The only instance I can think of would be if you were at a high latitude and wanted lots of light in the winter. Some sort of solar concentrator mirror seems more practical though.
I've actually picked up on 'unity feel' from shaders and shadows, since those are limited to the paid version.
An important point to note is that, if banks want/care, they can put other safeguards that solve this problem, too. In Europe it is common for banks to text you a 6 number pin to confirm an online transaction, for example. There is no good reason to not do these things. It's still not perfect, but certainly much better.
And from the text "jampoole" you can recognize that the person is called "Jim Poole"?
Yes but <20% adoption 18 years after the protocol was designed seems a bit slow, especially given the pace of overall technological change in this century.
> Both home runs-per-game and runs-per-game are down about 20 percent from their early-2000s highs. Strikeouts are up about a fifth.

There's an english style guideline that says if you need to use a concept more than once, you should use a different word every time, lest you seem like the sort of clod who only knows one word. But doing it with numbers feels like a purposeful attempt to mislead the reader.
Actually back in the old K&R days it was much much worse, as no real standard was in place, compilers were just kind of compatible with endless little surprises.

Specially fun when trying at home your UNIX homework and vice-versa.
Not even a day of battery life - that's such a deal breaker for me :(
Don't forget rhinoceros horns http://en.wikipedia.org/wiki/Rhinoceros#Horn_trade_and_use
I hope keeping it all patent free / disarmament patent style is a requirement for participation.
Jurassic Park 404 page
That's a really good point. The tech I'm referring to is used in high end (military simulation) gear but it is definitely todays technology and from what I can read it is an upper bound, not an average but that could be marketing, I haven't tested this stuff. But I've been following the 'wearable dual display' setup since a friend of mine built one in 1983 or so (using two very small monitors mounted to the side of a helmet and a bunch of mirrors (2 100%, 1 50%) to put the image in front of the eyes and that's the best latency for wireless that I've seen to date. Given that is a small fraction of the framerate and a latency rather than a throughput limit (so a constant offset rather than a limitation on quality) it imposes a small overhead (at 50 fps that's 20 ms/frame so 5% of the total time budget).

That seems a good trade-off versus being tethered, you could for instance make up for that by letting the rest of the pipeline generate an image that is slightly worse to achieve the same framerate in an untethered situation.

Of course any latency increase will always come at some price the question is whether or not that is an acceptable price for the improvement you get along another dimension all this assuming that's an upper bound.

(And maybe there is higher end gear that I'm not aware of)
Side note: The use of the GIFs on the page really cuts to the chase and shows immediately what everything is about. I only watch explanatory videos if I'm really interested in a product, therefore appreciate this presentation.
They didn't. The fan is integrated in the base. Actually the fan example is exactly what makes me look at any Dyson announcements with a lot of skepticism.
That is compiler specific behaviour.

You have zero guarantees it will work in another compiler or even between releases of the same one.

Never take a compiler behaviour for the standard. That's the beauty of standards.
12 hours is the reported life, but I bet that's with constantly fiddling with it. The device's battery life is probably proportional to how often the screen is kept on and CPU fully awake.

In real world usage, after the initial geek factor expires, the device will probably last longer. I've certainly had that experience with the other Android Wear watches and Google Glass.

I'd also expect the upgrade to Android L to improve battery life.
Just for your information, CodingHorror is just the name of the blog. The writer uses its real name: Jeff Atwood. It is therefore better to use it directly.
I'm going to throw my weight behind Anki as well. Apart from being a knowledge database, it actively works on increasing the cache for recalling knowledge, that is to say, your memory. People usually have requirements like needs to have a mobile app, needs to be open source, etc., but I'd argue that spaced repetition should also be a requirement for everyone. What's the point of accumulating knowledge if you aren't actively working on it and internalizing it?

Like the parent said, Anki takes a lot of time to digitize everything, but I'd argue that that's where the learning happens. The process of distilling knowledge into a series of flash cards is extremely personal and involved.

My workflow:

- Out in the wild, when I come across a word I don't know or trivia, I write it down or put it in my phone via a text editor, or note taking app like Google Keep.

- I'll write notes down in a notebook if I'm learning about something new, since writing helps facilitate the acquisition of knowledge.

- When I get home, or if I have time with my laptop around, I'll open up Anki, and convert everything I've learned into corresponding Decks, subdecks and cards.

- I usually do this at the end of the day, and start with "small" knowledge, like new words or trivia. After I've put them into Anki, I wipe Google Keep and whatever else is on my phone. Similarly, I then go through my notes, and since everything is still fresh, with the help of the context behind the notes, I put everything into Anki.

...and my favourite part...

- The studying phase. Every now and then, when you get a free moment, open up Anki on your Desktop or phone, and do your reviews for that day. Anki will keep statistics and even show you what time of day you're better at recalling knowledge (I seem to be a noon kind of guy). Some people like setting aside time from their day to do reviews, but I like doing them on my phone on the go.

(And since this is HN, Anki lets you customize every aspect of the spaced repetition process, for those of you that like tinkering. Although, I'd recommend reading a bit about the process itself before changing anything.)

For the lazy: http://ankisrs.net/
By "non-growing season" I'm assuming you mean winter. If you don't live in the Arctic Circle, or have temperatures to match, it's quite possible (I've seen it done anyway) to grow some vegetables under glass even in pretty unfavorable climates. Modern greenhouse materials are amazing.

With short days or chronically overcast skies, daylight still gives adequate blue light such that supplementary high-pressure Na (reddish spectrum) lighting can provide good enough conditions at low-moderate cost.

It wouldn't duplicate the lovely garden you describe, but might be better than nothing at all.
I wonder what'd be like if individual taxi drivers had online reputations and histories like ebay sellers.. then that could be really useful. You could even take a cab in a not-so-safe country with confidence. The problem here is what if a different driver arrives (I suppose the website should have a photo of the driver that one should expect.)

Also, successful drivers themselves may become targets for whatever reason.

Could work for the driver if they can transfer between companies and keep their reputations. They could even relocate.

Another future industry that could be disrupted in such a manner: personal security and tour guides .. used in countries that are generally unsafe.

Is there an ebay/uber for tour guides?
Node.js V8 Stack Overflow Denial of Service Vulnerability
Once again, ethics gets run-over by the greed bus. Nothing new to see here folks, carry on...
The Moto 360 goes on sale today from $249.99
https://github.com/c0rner/scripts/blob/master/tmux_save
It'd give somewhat better traction but at the same time you increase the likelihood of stalling your motors. How does the machine know if the motors are stalling because there's something jammed in the wheels or because the vacuum is sucking stuck to the floor? You can design algorithms or sensor mechanisms to try and determine this and also tune the motors but now you have even more problems!
Motorola Launches Moto 360 Smartwatch
JavaScript 101-#3 – Variables and data types Pt2
The Email Fave Button Could Actually Happen
I refuse to hold broad funds for this reason. It's much less convenient and potentially a lot costlier (making individual stock trades or at least sticking to smaller sector funds, which generally have higher expense ratios, where I can approve of each holding), but I have my own definition of evil companies and I refuse to hold even 0.0000000000000001% of them.
Candy Crush Saga isn't really a clone. Yes, it uses 3-in-a-row matching as a primary gameplay mechanism, but whereas every level of Bejeweled is the same identical square grid with identical goals, every level of Candy Crush Saga is different. Different board layouts, different goals to complete, different obstacles or special gameplay features. So rather than it being just ONE puzzle game, it's over a thousand distinct puzzle games.
I have a Pebble and I'm quite ready to upgrade to a 360. Google Now is the secret killer feature that reviewers don't take into account — probably because they've only had the device for a day and are in plugged into Apple services instead anyway.

My two caveats are battery life and wrist straps. The early reviews suggest about 12 hrs battery life which is the bare minimum I'm willing to accept. I don't mind charging it every night for the increased functionality over my Pebble. The one disappointment is the lack of steel bands at launch. I'd prefer to get that now from Moto instead of paying extra when it's released later this fall. Despite those issues, I'm buying one today.
Because fighting infringement trumps short term profits for larger companies.
We are sorry to inform you that your little fella is dead.
Hacking Hotel Automation Systems and Targeting Country Infrastructures
One excellent organization is U3A http://www.u3a.org.uk/ My father runs one of their groups that specializes in studying geology, and they regularly have a hundred people turn up to the seminars they run. Science and social go well together when you've lots of free time.
Nest Thermostat Hacking and Google Glass Password Spying at Black Hat 2014
The funny thing to me is that the standard crypto packages for other languages nearly always end up calling C code.
Being productive with Emacs: (slide 9)
M-x tetris
I started implementing some of it into magit, but I could never get magit + ediff working in a way I liked more than just invoking ediff myself.

Knowing the thorougness of magit, there's probably a way to successfully do this with minimal customization.
You see carbon copies of celebrities running around all the time, in fact that is one of the main drivers behind the fashion industry. Both men and women do this and even though it totally weirds me out (I'm a jeans-and-t-shirt guy on private time and I'll add a simple shirt on professional days) I do think there is a business case by tying into celebrities. It immediately creates a rights issue though.
It strikes me that while it less unlevel (if that's a word) the playing field is still skewed. I have occasionally assumed that YC companies would be amount the first to use crowd-funding for their early and Series A rounds.

(About a year ago there was a lot of interest in new rules allowing small investors to get more easily fleeced / access to startups and YC seemed that sort of "Brand" I would trust in that area)

So yes a more level playing field for professional investors but still opaque for spreading the wealth around once the great hollowing out takes hold.

(Before my socialist underpinnings are revealed I want to point out I welcome this - YC seems in good hands - I was just interested now they moved slightly in one direction, I want to see more movement !)
I was referring to the first sentence ("It is a little mind boggling that support for proper handling of this didn't arrive until c11."). I don't see anything C11-specific in the code Percival posted. I don't know enough to say anything useful about the rest of your comment.
Thanks for information about trademarks. What about utility, utility models and designs? Can it be protected in China?
How Google Manages Their Teams and People – OKR, Objectives and Key Results
ex-dyson robotic engineer here.

Correct - low weight means you have less force to apply to the wheels and hence achieve grip. The design of the aperture where the air goes into the vaccum (the soleplate) has to be optimised between flicking the carpet fibres in the right fashion to achieve good dirt pickup and not impeding sliding across the carpet too much.

The design of the tyres is critical. If there is any slip in the tyres you have a problem. Even though the attitude and trajectory of the robot is governed by the information coming from the camera it does also rely on feedback from the wheel speed sensors. If you have slip on one side and not the other then you will tend to spin around and not drive in a straight line. Adding more power to the slipping wheel merely exacerbates the problem.

You'll notice the treads on the tank tracks are chunky. This is to give maximum grip on thicker pile carpets, however this kind of carpet tend to be "squishy" and allow the wheels to float somewhat on the carpet surface no matter what design of tyre. So this is probably where they are having problems. Also you'll notice the wheels are not rigidly mounted to the robot chassis, they have suspension. But unlike car suspension the bottom of the robot does take some of the weight and it touches the floor. If you have more mass in the robot it gives you more latitude to distribute it between the wheels and the soleplate.

Its a careful balancing act and all of these variables have to be tuned based on the amount of suction your vacuum motor is providing.
> I think I moved to the default that all are corrupt and either engage in abuse or cover up of abuse unless I am presented with evidence otherwise.

I sure hope you appreciate the irony of this sentence.
Form over function? They made something that looks elegant without considering how people use watches. As the reviewer mentioned, you forget about it, it just becomes something you use adhoc during the day. Adhoc has to last 24+ hours.

Could they not have made it thicker just to increase the battery size and make that a selling point?

From a design point of view, you could then have made a chunky watch component that could then sit inside a chunky colourful wrist strap and housing.

I really cannot see the point in a watch with a 12 hour battery life.
Did you look at the Neato ones. Their new botvac can vacuum very close to a corner since the brush and vacuum head is placed towards the front and left.

http://img1.lesnumeriques.com/produits/601/20289/Neato_Botva...
At a guess, people that think that if they dress like celebrities they'll be more attractive somehow.

I couldn't care less what a celebrity wears but enough people do that I think it might work, judging by the reactions here he's found a bunch of takers already.
You can select any other company far from becoming a powerful monopoly such as Dropbox or Facebook.
> If I've understood the presentation correctly, Raft is a
> master-slave protocol that determines how to choose a
> master.

You haven't understood the presentation correctly.
Great, another 5.2 inch phone like everyone else.
I was expecting a good argument on why it's launched in JA prior to US, UK or EU. Just the fact that Japan is a big adaptor for robotics doesn't make it. Roomba and others have established solid markets for that kind of product outside of Japan already. I hope Dyson can match the demand and will start selling the 360 eye globally soon.
Isn't that problem self-solving? Who wants to dress like a celebrity dressed last season- you want what they're wearing this season. Keep it up to date, with what's "in" now.

Disclaimer: I know nothing about fashion.
Recently, there was a article about why Vultures get killed in Africa (it has to do with ivory also)

http://www.nytimes.com/2014/08/28/opinion/the-poisoning-of-a...
From the link:

Neither the name “Markdown” nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

I believe that a spec is a derived product, at least partially, from the code?
Definitely not my area of expertise, but my understanding is that the upper reaches of the atmosphere are quite dynamic, and various circumstances (including possibly solar storms) may cause the atmosphere to reach out further than it normally does. Density of the satellite in question, and extent of any large surfaces (solar panels, etc.) which might tend to increase drag or cause tumbling (a bird does no good if it doesn't point right) are other factors.
Army can't track spending on $4.3b system to track spending, IG finds
I don't know whether or not OP is correct in thinking that Uber drivers' use iPhones only, but I know that for the Uber rides I've been on, the drivers certainly have an extra phone that they use for Uber (I assume company issued) in addition to their personal phone.
When you play enough games, most widely-used commercial engines tend to have a 'feel'. For example, I am fairly confident I could pick engines out of a line-up consisting of Unity, Unreal, Source, CryEngine and RAGE (Rockstar's engine).