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Would you ever open it up to past years? I would love to go back to see if I missed anything in a past year. I could then maybe refile and get back some money.


How does this work with other noises and interference?


I'm sitting outside on my deck. Birds are chirping, dogs are barking. There was a clear 20kHz band, but the resizing rectangle was just randomly jumping around, and when I turned on the hands free scrolling the webpage started jumping up and down randomly and rapidly.

But hey, this is an excellent project! Love it.


Because something fairly specific is being searched for, the signal should stick out from the noise fairly well.

One could also use a pseudo-random code instead of a steady signal to further distinguish the signal from the noise (in the style of GPS).


This simple demo wouldn't be very good at noise rejection, but the general idea could be extended to reject noise very well. One option is to use a wider-band signal, like a pulse or a chirp. Signal processing techniques could then be used to extract the doppler while strongly rejecting noise. Another option, especially if you want multiple devices using this technique to work near eachother, is to use code division pulses (the same approach as CDMA). These kinds of pulses aren't that good at rejecting noise, but can be made very effective at rejecting other devices using different codes.


If they're up around 20khz probably not well.


No, but a K80 isn't really meant for workstations (from what I understand). Plus, it's $7k while a 980 is sub $1k typically.


Well, first of all, just to clarify, I was asking a question, not a statement. I recently ordered a HPC server for my company, we're using caffe to train/detect very large sets.

I went with the K80, the company we ordered it from charged us $4400 for the card, so there must be a good amount of markup that can be negotiated out of it.

I have since read some material comparing the K40 to the 980, giving a slight edge to the 980, which is surprising considering the price points, but I have not yet found any good benchmarks/posts about the K80 vs the 980. The K80 is not just two K40's glued together, as it uses the GK210 tesla chips rather than the GK110. The GK210 is a more advanced chip with more cache and better energy efficiency but I'm really not too sure how it translate into real world performance.

If anybody has any data or perspective on this, I would appreciate it.


Just my 2 cents. I've been trying my scientific computing code (QM/MM, not ML) in a cluster using various configs (6xK40, 4xK80, 6xK20, etc) and the performance I noticed of the K80 is quite strange. I've been using the CUDA_DEVICE 0,1,2,3 of that config and if I try to use more than one logical GPU, the performance is not 1:1, but more like 1:0.6

The only conclusion I've been able to find is that the K80 presents itself as 2 different devices (0,1 or 2,3 in that config) but the performance is not 2x, at all. There is quite a lot of PCI bus contention, hurting badly the performance of my code (as it is just running many <10ms kernels at a time). So far, having 2xK40 seems to be a better value and performance proposition than 1xK80 on the same bus, but the flops/watt aspect of that equation favors greatly the K80.


The author's specific code can be found here: https://github.com/callumprentice/callumprentice.github.io/t...

Where he loads the flights in can be found in js/flights_one.js


Agreed. Why should I pay $4.99 for quarters when I could go to the bank and get them for free?


The website is down. $4.99 for how many quarters?


The plans are $15 for $10-worth of quarters, or $27 for $20-worth of quarters.


Its $10 in quarters for $14.99 (or $20 for $26.99 on the higher tier plan).


Subscription pinball capacity?


And there seems to be no validation of the localStorage. I could set it to 0.000001 for example and it would work.


Looks just like the design/functionality of http://www.jsoneditoronline.org/ which seems to be an older project


Yeah, it uses that for the editor, but also has a full HTTP API (http://jsonblob.com/api) behind it for storing the JSON and accessing it from outside the browser.


I think all they have to do is litterally like or retweet your post.

Imagine the fear of someone when the IRS likes your post.

You would definately do your taxes right after that because you'd think they knew what you are up to.


Any plans on making one that can move around on wheels?


Haven't thought about it much -- my first thought would be that the solution in the blog post could be the right one for a small office where movement of the base isn't necessary, and for one on wheels you should just go buy from Double Robotics. Their product looks really nice.

If I had to build one that moves around, I'd start with investigating the Roomba API, with an aim to mount the iPad on a Roomba and expose remote control of the Roomba to the chatter. You wouldn't get as high off the ground as a Double robot without making the mount unstable, though!


Interesting, this has been in development since sometime in November of 2013


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