Torkel

Interesting, frogs boiling etc, but... What is up with all of these wikipedia entries making the front page of hacker news? Has it always been so and I’m mis remembering thinking this is something new?

Pre not post

(”Production Status: Pre-production”)

I have a similar memory! I read about the problem in the book and worked on it for days, trying to solve it. I was in junior high at the time, and my math teacher spotted what I was doing. The teacher figured out quite quickly that it was impossible to solve. And I felt sort of dumb for not figuring out it was impossible and having a teacher prooving it :)

Main work seems to be two years old from the github time stamps?

The generation of images using GANs has improved a lot since then. It would be interesting to see what the latest and greatest methods can do given this data set.

Wonderful story :)

From date in mail list (https://lkml.org/lkml/2014/11/24/407) seems like [2014] should be appended.

Given strength and size and other properties that carbon nanotube ropes would need have... Wouldn't a carbon nanotube shoelace be like the worst idea ever? ...strong as a steel cable, but so thin as to be hard to see and handle. And brittle and not so good at bending. => First it slices up your hands when you tighten it and then it breaks when you tie it :)

Yes! :D

Oh, ten at night, time to scream out the window!

When I lived in a dorm in Uppsala there was a girl there, an exchange student from China, and she purchased surströmming for cooking, thinking it was regular fish. So she opens up the can and, boom, smell. Still thinking it is fish (”Sweden is a strange place, maybe they don’t get the fresh stuff here?”), she proceeds to rinse it it under the faucet and then makes a chinese dish with surströmming as the fish ingredient.

Surströmming is great - in small amount together with fresh potatoes and melted butter, on thin crispy bread.

nit: an abstract should describe the obtained result

Here's some additional information on Edeva's first export order:

https://www.highways.today/2017/09/08/dynamic-speed-bumps-cr...

David saw a surge in web-traffic and traced it back to this HN thread, and then pinged me about this :)

Speaking to a founder to a competing company (https://www.edeva.se/en/) I found out that there has been many attempts at solving the problems of speed bumps:

- Everybody gets bumped, not only high speed vehicles - Emergency vehicles need to slow down - Bus drivers and others can get back problems from speed bumps

Most solutions break down because the forces and the wear and tear is so tremendous. The solution from Edeva seemed clever to me because the swing a trap door down so the bump comes from the solid ground and not from a moving part.

I'm curious how this liquid solution handles emergency vehicles and the wear+tear. A mechanical solution is good but very expensive. A liquid solution seems like it could be made cheaper.

iPhone was released 10 years ago. We have insanely more capable screens, cpu:s, gpu:s, sensors. Find what's next and you will make a dent in the universe.

Link to full paper via sci-hub: http://twin.sci-hub.cc/ac1a63745360991b7b9a42390ab3faa8/krig...

(Sorry if this is a dupe and hope this link is persistent, I scanned the thread and saw some people lacking access and didn't see any sci-hub post)

Yet another really impressive deep-learning result. From scanning the paper, the data-sets seems to be rather limited though (that's why the sentences are so contrived), so hard to use in real life situations at this stage.

To me this has some very interesting applications: e.g. surveillance cameras can scan crowds and conversations can be searched using word-queries. Or maybe people will want to do sentiment analysis of what is said in a store or restaurant.

This is an interesting topic - I've read some good articles on it. It turns out that lithium ion batteries contains only quite little lithium. 1-2% of the weight _and_ value of the battery only. And there are multiple alternative sources of lithium. So actually world battery production will not be constrained by lithium.

I guess that's the reasoning...

But factor in cheaper EV cost of driving, and posit:

taxis, delivery vehicles - changes fast to cheapest (EV)

Private and corporate leases - 2-3 years between replacements. Will move to cheapest option (EV)

How much of total driving is made in these categories and how much is "long tail" of private driving in old cars? S curve I say.

I find it strange that articles such as this one states these two things at the same time:

1. Battery cost is falling and EVs will be as affordable as their gasoline counterparts in six years

2. It will take until 2030-2040 until the demand for oil starts contracting

It seems to me like you get to pick only one of these statements. Once EVs reach affordability parity with ICE autos my guess is that things will hit the steep part of an S-curve.

It's the magnets too - the NIB rare earth magnets enable permanent magnet motors that are much more efficient than before.

I wish someone would make some linear ones...

Yes. From what I heard when working at Saab (which makes sytems like this), it is a very... memorable... experience sitting in the second seat of a fighter aircraft when the pilot demonstrates this capability.

There are a few different things going on with a shaking camera that makes the video bad: A: Movement between frames B: Slow intra-frame movement C: Fast intra-frame movement

As I'm reading this announcement they have a nice solution for problem A - moving camera. Problem B and C results in jello-effects (assuming rolling shutter) and blurriness, respectively. There are research solutions for all of them (see e.g. "Dolly-cam" from Per-Erik Forssén et al at Linköping University). But for practical purposes you are still much better off if your camera is not shaking all over :)

Look at drones and compact cameras for examples: gimbals and optical IS beats digital stabilization every time.

There is a good episode of the podcast 'Econtalk' on this subject. My take-away from listening to that is that supply and demand and setting the price according to the supply would solve most of the world's water problem. Except that's not the way it's done.

They mentioned so many silly subsidies and flat out craziness going on in the water markets that it made templated C++ code seem sane in comparison :/

When I read this article and also when I see quadcopter endurance tests (just over two hours) I come to the same conclusion as you do. Electric jets aren't happening.

So it is so strange and fascinating that Elon Must seems to think that it could be done.[1] Like: if we take todays lightest and most aerodynamic sail plane, add batteries and an electric motor, and it's still worse than a cessna [2] - how exactly does he reach the conclusion that electric jets, _vertically starting and landing_ jets, are feasible? I really wish for something like the hyperloop design-docs to explain the thinking behind it :)

[1] e.g. http://bgr.com/2016/02/07/elon-musk-electric-jet-great-idea/ - “Well I have been thinking about the vertical takeoff and landing of an electric jet a bit more,” Musk said. “And I think I have something that might be close. I’m quite tempted to do something about it.”

[2] MEA: https://www.iei.liu.se/machine/applications_re?l=en

Yeah, I know it's hard to see the slides, and I haven't put them up online, sorry... The plan was to split the hdmi signal and put slides etc on a virtual screen in the 360 video. ...but the hdmi splitter didn't work. It turns out hdmi splitters have a hard job (2way com in hdmi). We'll probably implement a loopback, so hdmi into the computer is looped back out untouched so there is no need for splitting it. So next presentation we'll stream should be more watchable!

Interesting and fun to read about experiments like these! Seems very well funded. As I read it the conclusion is that by combining multiple cameras (and possible dedicated depth cameras) a depth map / 3D model can be created, and that that is good for 360+3D / VR.

After working for a while on live VR video, I have come to the same conclusion. It's actually the basis for me and my company's current work in the area. (Perhaps there is interest in hearing more about our approach, if so here is a saved 360 livestream from an event last night when we talked about it: https://www.youtube.com/watch?v=BVQt0SrLzHY it's about 15 minutes in)

I agree - SpaceX is incredible! They capture the imagination and hopes of our time. They stand for making our dreams come true.

I used to watch the live-blogs and then livestreams of Steve Jobs when he delivered his keynotes. It felt like seeing and hearing the future. Every new announcement was thrilling and exciting.

These days it's SpaceX's launches that gives me a similar feeling. A feeling of seeing and being part of something truly important.

If another company communicated in the exact same way it wouldn't be the same, because the story and the sense of importance just isn't there. I could imagine something similar being done in AI, robotics, prolongation of life, clean energy. But to be as great as SpaceX is, I think the mission needs to be something that resonates with us as being profoundly important.

Maybe someone wants to call me out and say that Apples products under Steve Jobs were not that important. But I'd say they were. iPhone, iPad - they changed our world. It's just now we've gotten used to it. I hope we'll one day get as used to people living on Mars! :)

3D on the forward view - not really needed elsewhere!

Thanks :)

On the robot we're using RTP and usually stream the individual cameras separately at about 4Mb each (1440x1080). That is a bitrate where we see little improvement in image quality from going higher. We can go lower, 1-2Mb/stream, but probably if you want to save bandwidth you'll want to process the video into equirect or cubemap or something locally and then stream that at 4K at whatever bandwith your network can handle.

Operating the robot over 4G should work, but I haven't tested it yet :)

The VR system actually gives a wider field of view than what a person in a cabin can see, so the situational awareness is improved. But it's also an ideal first application - forestry cranes usually operate where there are no people around to begin with.

Super excited about this finally being revealed - my small startup Voysys makes the OdenVR Render Engine that powers this product :)

I think there are so many telepresence and remote-operation use cases for VR. It's not yet widely known how powerful it is to experience real time VR when you also can control something remotely.

http://odenvr.com/hiab-reveals-hivision-remote-crane-operati... http://voysys.se

I think robotics will solve this issue.

Today, automated cooking makes food that is unhealthy. Industrially processed food equals bad food. I think this is a large part of the reason for obesity. There is so little healthy food that is cheap and requires no manual effort to cook.

With sufficiently advanced robotics, the equation changes. All food that humans can cook well today becomes available with no cooking-cost. The availability of tasty and healthy food, at low cost, with no effort involved in preparing it, should be a game changer in more ways than one - and obesity ought to go down.

(Side-note: that the cost of cooking today is not in money, but in effort and time, doesn't make it less deterring but rather more so.)