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A Worm's Mind In a Lego Body

raftpeople Re:Not the Functionality of a Neuron (200 comments)

Just one example of many of the need to properly model the dendritic computation is the hippocampal CA1 pyramidal neurons performing 2 different computations depending on the spatial distribution of the incoming signal (and level of synchrony). Either it performs input strength encoding or feature detection. You can't ignore this and end up computing the same thing, your end result will be different.

about two weeks ago
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A Worm's Mind In a Lego Body

raftpeople Re:Not the Functionality of a Neuron (200 comments)

Well, if we consider the example of object recognition happening in dendrites of human visual system, that requires a neural network all by itself to emulate. It's absolutely doable, but there is a huge difference between integrate and fire and a non-linear NN style mapping of input to output. There are other examples of dendritic signal processing which all point to neural computation really being a level below the neuron, each neuron is a network in it's own right. So, instead of 302 neurons, to properly emulate, we may need 302 * 10,000 computing nodes ("neurons").

about two weeks ago
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A Worm's Mind In a Lego Body

raftpeople Re:Not the Functionality of a Neuron (200 comments)

Don't get me wrong, I like it, my point was just a word of caution about what has been accomplished with this. The neuron is constantly getting more complex as they learn more and the older assumptions about being able to emulate at that level are pretty much gone by neuroscientists.

about two weeks ago
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A Worm's Mind In a Lego Body

raftpeople Re:Not the Functionality of a Neuron (200 comments)

Researchers are finding that those dendritic computations are frequently very important. One example is that object recognition happens in the dendrites in human visual system. Another example is that backwards spiking in the dendrites is a key part of learning. Maybe you can emulate the dynamic learning algorithm but I seriously doubt they figured it out and are emulating it, which means the system is not dynamically adjusting the same way the worm does.

about two weeks ago
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A Worm's Mind In a Lego Body

raftpeople Not the Functionality of a Neuron (200 comments)

They did not emulate the functionality of a neuron. If you read up on the subject you will find that the neuron is a network all by itself with spikes moving forward and backward, local spikes on the dendrites, the dendritic tree performing multiple simultaneous linear and non-linear computations, etc. etc. etc. They used an extremely simplistic formula that completely skips over these computations that have been shown to be very important for the proper functioning of the neuron.

about two weeks ago
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Japanese Maglev Train Hits 500kph

raftpeople KPH (418 comments)

Kamikazes Per Hour?

about two weeks ago
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Amazon Robot Picking Challenge 2015

raftpeople Re:What about Amazon's Kiva robots? (106 comments)

They've installed the Kiva robots in a few DC's and they are continuing to expand their usage.

about a month and a half ago
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Samsung Paid Microsoft $1 Billion Last Year In Android Royalties

raftpeople Re:So... (93 comments)

99.99% of all software patents are trivial for a skilled dev and have been coded by many parties in many forms in many environments over the last 60 years. There is very little software that is non-obvious to any skilled person in the field.

about 2 months ago
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Senators Threaten To Rescind NFL Antitrust Exemption

raftpeople I think they should... (242 comments)

1 - Startup
2 - Cash in
3 - Sell out
4 - Bro down

about 2 months ago
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Robot Printer Brings Documents To Your Desk

raftpeople Better Idea (64 comments)

Why not automatically scan the printed document and email it to the person?

about 3 months ago
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Sony Forgets To Pay For Domain, Hilarity Ensues

raftpeople Re:Black hole? (277 comments)

Good point, I better print the email reminder and place that in the three ring binder that sits behind my desk.

about 4 months ago
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New Microsoft CEO Vows To Shake Up Corporate Culture

raftpeople This is what it means (204 comments)

increase fluidity of information

Apparently the information at MS is not very fluid, so this is a serious attempt at making that information much more fluider

and ideas

This one suspiciously coincides with the legalization of pot in WA state

flatten the organization

I think this is really a statement about facilities, there is a lot of wasted vertical space so most likely they will be installing something like those Japanese "drawer" hotels (where the person lays in what looks like a human sized drawer). They should be able to put a screen and keyboard in there so people can work laying down. I'm guessing they can get 3x more people in each building with this system.

about 5 months ago
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Arecibo Radio Telescope Confirms Extra-galactic Fast Radio Pulses

raftpeople The most likely content... (95 comments)

"Sirs, I am happily to provide benefit of a unique opportunity. The Bank of Ursa Major has..."

about 5 months ago
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Will Google's Dart Language Replace Javascript? (Video)

raftpeople Things like this rarely work out (180 comments)

There is too much momentum for what is being used today, it's almost impossible to dislodge a de facto standard.

about 5 months ago
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The World's Best Living Programmers

raftpeople Re:Best game programmer (285 comments)

How do you define best? Just because you've heard of someone doesn't mean they are the best. I programmed games back in the 80's and during that time I ran into like-minded people and within that group it's tough to tell, different people have different attributes, It certainly possible to tell who has natural talent, but I don't think "best" even makes sense.

about 5 months ago
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Apple Hires Away TAG Heuer's VP of Global Sales

raftpeople Re:What's next (67 comments)

"but these days they have been surpassed in most areas" - their last CPU outperformed rival phone CPUs.

about 5 months ago
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Apple Hires Away TAG Heuer's VP of Global Sales

raftpeople Re:What's next (67 comments)

They've been hiring CPU and GPU designers for the last few years and their last CPU was their own design and outperformed rival CPU's at the time.

about 5 months ago
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First Movie of an Entire Brain's Neuronal Activity

raftpeople Re:Having no idea... (44 comments)

That worm brain is well studied, but they still do not understand how it works. Whenever you see something about someone simulating a human brain, or a cat brain, or a rat brain, just remember that the people working on this stuff realize that even 302 neurons are still too many to understand currently.

about 5 months ago
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First Movie of an Entire Brain's Neuronal Activity

raftpeople Re:Having no idea... (44 comments)

Short answer: yes, different levels.

Longer answer: There is much complexity and the real answer would probably cover a few books. But a few highlights: neurons have their firing rate and their spike levels modulated by a variety of things in the brain. Glial cells (which are 10x more numerous than neurons) inhibit and disinhibit neurons, communicate with each other and are involved in computation. Some neuron communicate with a continuous flow of protons (inner ear, acceleration detection), some fire locally on their dendrite instead of the typical method of sending a signal down the axon. There have also been recent discoveries linking microtubule quantum vibrations to anesthesia effects (implying it is part of computation).

about 5 months ago

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