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mannigfaltig

386 karma · joined March 4, 2017

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mannigfaltig··on Show HN: Logo Crunch – Multi-resolution logo maker
These kind of fundamental methods in computer vision are commonly called "image processing".

"Computer vision" typically refers to computations that have an interpretative component (image analysis), i.e. programs that actually "see" something. Interpretation basically refers to the inference of the state of the "world" (or a part thereof) from an image. Image processing is often used in pre-processing for computer vision applications, but it also has many other purposes which do not need image analysis, such as in photo and video editing, as well as in generative applications, e.g. 3D engines and video games (which can in some sense be seen as the inverse of vision). Therefore, image processing is not exactly a subset of computer vision.

mannigfaltig··on A Material That Throws Heat into Space Could Soon Reinvent Air-Conditioning
So we're going to shoot these precious entropy differentials away into space?
mannigfaltig··on Decentralized Social Networks Won't Work
What are the key reasons someone should go to Steem rather than to some existing social platform? Steem will likely be slower and the barriers to contribute will likely be higher.

Secondly, do you think it is a good basis for building communities if everything is associated with monetary rewards? Sites like Reddit are exactly enjoyable because, most of the time, reward is only imaginary, just like in real-world gatherings of people: It is about having a good time rather than about an exchange of money.

Thirdly, how do you ensure that the things people post on Steem are their own work, especially if the data is hosted elsewhere, e.g. on YouTube. There will probably be massive, irreversible thefts of intellectual property (a.k.a. reposters, but with actual money involved). Conversely, a lot of valuable content comes actually from reposting and "karma theft" (which is what linking e.g. a blog article from someone else actually is).

Fourthly, how do you avoid fraud as for example often found on Kickstarter? Kickstarter actually has a review process and even they are not fully equipped for it. I am not seeing reliable moderation ever scale enough such that it can withstand the likely immense fraudulent interests due to the monetary incentives.

mannigfaltig··on iPhone 8
Unfortunately, the most environmentally friendly phone is still a horrible polluter because it is purposefully built to justify an upgrade each year, as required to survive in our beautiful free market.
mannigfaltig··on Gap Buffers Are Not Optimized for Multiple Cursors
Come on now. The advantage of multiple cursors is instant feedback by cycling through the cursors and observing all the changes in real-time and by being able to undo changes and interactively adapt to the observed problems, without having to redefine the entire sequence of actions. Macros can achieve the same, but in many cases it just takes much more time.
mannigfaltig··on Climate Engineers Sucking Carbon Dioxide from the Atmosphere
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mannigfaltig··on Hardware Architectures for Deep Neural Networks [pdf]
Humans consume 0.7-1.3 kW per capita. A network of these chips scaled to human brain capacity would consume around 10 kW. It is really not a big difference. Our robot overlords are going to be quite efficient!
mannigfaltig··on Where will artificial general intelligence come from?
On the other hand, one can possibly steer the evolution towards a direction that enables general intelligence to evolve. In nature there are many local minima due to biological constraints (body weight, cranium size, birth channel size, predators, payoff between energy investment into large neural networks vs large muscles, ecological niches). In a simulation one can probably avoid many of these local minima by changing the rules that govern the simulation.
mannigfaltig··on Where will artificial general intelligence come from?
The main objective function in nature is very simple though: maximize the number of copies of your genes. Such an objective enforced in a resource-constrained multi-agent world (as suggested in the slides) could really lead to quite complex sub-objectives which may as well lead to general intelligence. For example, if each agent can process information and perform work, it follows that individuals that have better cooperative abilities also have a larger reproductive success. Cooperation is, however, extremely complex: It requires communication, identification of other individuals, establishment of trust, early detection of betrayal etc. The necessity for modeling the actions of other agents alone provides plenty of correction signals toward general intelligence because modelling other agents is such a difficult task.
mannigfaltig··on What Is Trump Worth to Twitter? One Analyst Estimates $2B
Maybe that is also the reason why Trump's account was not banned for violating the terms of service yet?

https://twitter.com/kalpenn/status/896013769410740224?ref_sr...

mannigfaltig··on The Strange Disappearance of Cooperation in America (2013)
The statistics in this article contradict what you say: http://www.slate.com/articles/life/moneybox/2015/05/sex_hist...
mannigfaltig··on 'Using Emacs' Series
> Every new thing you learn incrementally speeds you up.

Like forgetting the original keybindings and switching to evil.

mannigfaltig··on The future of deep learning
> Because neural nets do not work that way

Are there works that expose this limitation of MLPs more formally?

>not everything good can be made More Neural.

Neural networks are universal function approximators, so you probably mean not everything good can be made with MLPs trained by gradient descent?

>It's the lack of [...] the ability to perform inferences over discrete spaces.

How would you judge the extent to which AlphaGo has learned to react to single discrete changes in the input. It seems that it learned very well to react very sharply to whether a single stone is placed at a strategically significant position.

mannigfaltig··on The future of deep learning
Are there any concrete attempts at transferring this concept to MLPs? E.g. by overriding the values of particular nodes/features by feedback connections?
mannigfaltig··on The future of deep learning
Is it in particular the dot product (correlation) in MLPs that prevents them from inferring all causal structures in the data? So, instead of template matching of co-occurrences of features in the layer below, we (also) need to learn whether and how one feature causes the other?
mannigfaltig··on The Strange Similarity of Neuron and Galaxy Networks
I personally treat profundity as synonymous with a large first derivative of compressibility (see Schmidhuber). Something is a profound insight if it allows to compress information much more than before, e.g. by explaining many phenomena with a simple rule (see physics). In this case, there is not much to compress. The two phenomena have closely resembling spatial features, but one is explained by the gravitational force and the other one is likely explained by evolutionary necessity. Maybe one can find some superficial relations via scale-free networks etc., but my expectations that there is anything to gain from that are very low, just because of how different the underlying mechanisms are (matter moving by attractive forces vs biological stuff that needs to communicate efficiently such that its superstructure does not die until it procreates or until its descendants are sufficiently autonomous for self-replication or to execute the adaptations shaped by some symbiotic, altruistic or group-selective evolutionary correction signals, if any).
mannigfaltig··on The future of deep learning
(Replying here for visibility.) In a different comment branch you mentioned counterfactuals. I've watched a video lecture about counterfactuals in graphical models by Pearl, but I'm not exactly seeing the significance as a "missing piece" in AI. Would you mind explaining a bit what you exactly mean?

Do counterfactuals have something to do with learning from negative examples and simulations? For example, if one shoots a ball and misses the goal to the right, one does not 'mindlessly' penalize the circuits that led to the exact motor decisions that were involved, but instead, one simulates alternative actions and uses e.g. (in this case linear) relationships between e.g. the angle of the foot or the wind speed and the shooting direction. The next time, one hence tries to aim slightly to the left.

Or are you referring to a much more fundamental level and my example might rather be a learning strategy that is more likely acquired by trial & error, reinforcement learning, meta learning ("learning how to learn") and/or via the shared concept space of language and culture?

Is it maybe related to e.g. prototype-based associative recall and a counterfactual is basically an alternative way of interpreting the data? "What error signal would I get, if I had interpreted X as Y?"

Or does it come from the Bayesian approach where you marginalize out all hypotheses, including the factual one that corresponds to the state of the world, but also all counterfactual hypotheses. So, including counterfactuals means going beyond the maximum likelihood point estimate e.g. by communicating confidence intervals or even entire distributions from neurons to neurons or neuron populations to other neuron populations?

mannigfaltig··on The New Firefox and Ridiculous Numbers of Tabs
Whenever people ask me about the excessive number tabs in my browser, I simply show them Einstein's desk: http://2.bp.blogspot.com/-eyOIn_EOW2Q/Vmcl6O-55OI/AAAAAAAADs...

I am not Einstein but it is probably not a bad idea to have a whole lot of interesting things around you all the time. Sort of like a cache or the way proteins are synthesized, like swimming in a nutritious soup. "Oh, look here is a piece that fits!".

One basically decreases the chance of forgetting interesting and useful information. "Out of sight, out of mind."

mannigfaltig··on NASA admits it doesn’t have the funding to land humans on Mars
I have trouble understanding the enthusiasm about space. Space hostile and empty. Why not simply send space probes and rovers at a fraction of the cost and spend the money more wisely, for example in projects which research aging, cancer, overpopulation and disaster management in face of global warming. Why do we need to make the exception for space and get drunk with nostalgia and romantic ideas of exploration, when the rest of science is usually about sobriety and utility. Where is the sober calculation that space exploration is more effective than other ways of spending research funds?
mannigfaltig··on Ask HN: What are the Madrid and Barcelona tech scenes like?
Kinda related: What about Portugal? What is the tech scene like in Porto?
mannigfaltig··on Understanding deep learning requires re-thinking generalization
Previous discussions:

https://news.ycombinator.com/item?id=13566917

https://openreview.net/pdf?id=rJv6ZgHYg

https://www.reddit.com/r/MachineLearning/comments/6ailoh/r_u...

https://www.reddit.com/r/MachineLearning/comments/5kfs23/r_u...

https://www.reddit.com/r/MachineLearning/comments/5cw3lr/r_1...

mannigfaltig··on Accelerationism: how a fringe philosophy predicted the future we live in
There is always a fringe philosophy that had it right.
mannigfaltig··on The meaning of life in a world without work
> invest time, money, and care into aiding the poor and the needy

Actually most organized religions are criminally inefficient at this. As an example the Catholic Church in Germany earns about 6 billion euros per year, completely tax-exempt. 50% of that actually comes from tax money. Now, if you look at social institutions which claim to be funded by the church, it is usually only 5-40% (rather the lower end) that the Catholic church contributes and the rest comes from insurance companies, contributions by the patients/care receivers and, again, from taxes. The church does not contribute to religious education at all and there also is no freedom of strike in the German Catholic church and many similarly miserable exception clauses.

mannigfaltig··on Stanford Lecture Notes on Probabilistic Graphical Models
https://www.quora.com/What-are-some-applications-of-Probabil...

I'd say for people with interest in ML and DL, the main insight from PGMs is intuitions about probability theory, especially conditional probabilities and the concept of (un)conditional independence. State of the art in which PGMs would be relevant is currently mostly brute-force learning via stochastic gradient descent (with momentum) in deep directed models/function approximators, but function approximation likely does not solve all problems as adversarial examples show. There are certainly very important applications of PGMs in all kinds of domains as listed in the link above (perhaps I would have added FastSLAM [1]), and there are also variational autoencoders/Helmholz machines and (Deep) Boltzmann Machines, which are especially interesting for research perspective.

[1] http://robots.stanford.edu/papers/montemerlo.fastslam-tr.pdf

mannigfaltig··on Thousands of computers now compromised with leaked NSA tools, researchers say
> Which is what exactly? That a spy agency is spying?

To spell it out: backdoors are of course a helpful tool for a security agency, but once the key for the backdoors falls into the wrong hands the potential for misuse is monstrous because, well, the backdoors are in all kinds of potentially critical systems systems, e.g. even in the cellphones of high ranking officials (or in cellphones of their families) etc.

To get the same intel by different means than a backdoor is of course much more expensive. So one needs to find the sweet spot, where the utility as a function of cost and security is maximized. That sweet spot likely does not involve backdoors.

mannigfaltig··on Firefox 53: Quantum Compositor, Compact Themes, CSS Masks
http://catb.org/jargon/html/B/bikeshedding.html
mannigfaltig··on Clac – A command-line, stack-based calculator with postfix notation
Actually, the prospect of maybe, randomly getting to the front page of HN with some small interesting program is a nice motivator for small side projects. Overall it's probably a good thing introducing people to new concepts and ideas along the way (in this case Forth, post-fix notation and stack-based evaluation strategies).
mannigfaltig··on An In-Depth Look at Google's Tensor Processing Unit Architecture
The brain appears to spend about 4.7 bits per synapse (26 discernible states, given the noisy computation environment of the brain); so it seems to be plenty enough for general intelligence. This could, of course, merely be a biological limit and on silicon more fine-grained weights might be the optimum.

Here is another paper demonstrating very good results with just 6 bit gradients: https://arxiv.org/abs/1606.06160

mannigfaltig··on Tears
There seems to be a very interesting book in the making by the same author and in a similar vein of this article. The website says it will be finished at the beginning of 2018:

http://elephantinthebrain.com/outline.html

mannigfaltig··on They Used To Last 50 Years
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