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User: Giant+Electronic+Bra

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  1. Re:There is a way around that... on Fuel Free Spacecrafts Using Graphene · · Score: 1

    Probably. lol.

  2. Re:Even More Thrust on Fuel Free Spacecrafts Using Graphene · · Score: 1

    Well, if you had a very highly charged object, then clearly the separation of charges represents a substantial amount of potential energy. Capacitors are essentially this type of device, a SMALL amount of current is stored by virtue of an electrical potential between two plates (IE there are more electrons in one plate than in the other, but equal numbers of positive charges). One Farad of capacitance results from one Coulomb of electric charge, which is roughly the number of electrons in 1/20,000 of a mole of hydrogen gas (2 milligrams more or less).

  3. Re:Obviously on Fuel Free Spacecrafts Using Graphene · · Score: 1

    Its not that kind of a thing. It demonstrates that LOGICALLY there is a correspondence between conservation laws and symmetries of nature, and shows that Conservation of Momentum is logically equivalent to the universal equivalence principle (all physical laws apply the same at all points in space). This is fundamental and if it weren't so then LOGIC ITSELF fails. Its not some law of physics that might or might not exactly be true or only holds in some specific conditions. Either Conservation of Momentum is universally true everywhere, or there are no consistent laws of physics, and if this is not so then logic itself is meaningless.

    So, any time you have a 'theory' which violates one of the known universal conservation laws, then its pretty much insta-quack. Its always worth being careful about the fine print, because concepts like 'conservation of momentum' can get quite slippery in Relativistic Mechanics for example. This means that when something fantastic that breaks these conservation laws seems to happen what you will find is that the books ARE balanced, but it might not always be in a really obvious way.

  4. Re:Even More Thrust on Fuel Free Spacecrafts Using Graphene · · Score: 1

    Sunlight is photons, which, although they are the 'carriers' of the electromagnetic force, don't have an electric charge and thus cannot supply your spacecraft with electric charge! Even if they could there is a little thing called the law of conservation of electric charge, which would mean that each negative charge created has to balance with a positive one. If electrons are being ejected (by ANY means, it doesn't matter how) then corresponding positive charges must also exist, which presumably must be building up. As I said above, the electromagnetic force is VERY VERY strong, 13 orders of magnitude stronger than gravity. Thus a positive electric charge built up by a few 1000 fundamental positive charges would be basically impossible to overcome with whatever engine you were using, electrons would cease to be accelerated. This kind of 'thruster' simply can't work in any practical way. Ion engines therefore accelerate a charged ion and then at the last second reattach the missing electrons, so there is no net charge build up. Maybe something about this graphene phenomenon allows for a similar arrangement, but if not then it wouldn't really be useful except as a sort of parlor trick or in some other context.

  5. Re:Even More Thrust on Fuel Free Spacecrafts Using Graphene · · Score: 3, Insightful

    The key point with ion drives is they don't eject charged particles. They strip the electrons from Xe, accelerate it towards a grid anode (essentially this is a lot like a CRT) and then the electrons hook back up with the Xe ions on the way out, neutralizing them. So you end up with a high speed stream of neutral atoms, not ions. The spacecraft never develops an overall charge.

    And lest anyone be fooled, electric charges are VERY powerful, you would generate a negligible amount of delta V before your spacecraft's propulsion system completely stopped working. Nor does any fancy juggling act change that, if you lose negative charges you've got a huge problem.

  6. Re:Obviously on Fuel Free Spacecrafts Using Graphene · · Score: 2

    Well, there might be some sort of principle for a new and better ion drive of some sort buried in there. Its all certainly worth investigating, as any "WTF!" moment of this sort is. The hype about reactionless drives certainly is drivel though, and it seems your average peruser of online science fora has little or no clue about small things like Noether's Principle, which pretty well guarantees nobody is violating Conservation of Momentum, ever.

  7. Totally Agree on What AI Experts Think About the Existential Risk of AI · · Score: 1

    This is absolutely true, and is related to the whole "what is intelligence?" question. We tend to equate it with intent and free will because we're used to dealing with humans or at least animals that have a survival instinct and thus evidence 'will' to go with it.

    There's no reason to believe that artificial 'intelligence' will ever evidence the same sort of intent. There's very little reason to endow a stock trading application with a sense of self or a need to survive. Even if it had some rudimentary form of these things, for whatever reason, they need not take the form of concern about itself, it would be more likely that such a program would be designed to protect its funds!

    I can imagine some far future where in some sense self-driving cars have a 'will to survive' that makes them 'want' to avoid crashes, but they're unlikely to have the kind of self-awareness or ability to generalize that would be required to turn that into a desire to do anything except avoid traffic accidents, which is all they will need to understand about the world. You could imagine an interstellar space probe built to the level of a full general AI simply on the basis of having virtually no idea of what it will run into, but we're centuries from being able to build such things. As long as it can phone home fairly quickly all it might need is self-driving-car level 'reflexes', that would be useful. Even Pluto Express gets by as a totally dumb remotely controlled instrument, as do the Mars rovers. They don't need to be true AIs, not even close.

  8. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    I think 'superintelligent' is meant to signify 'beyond the intelligence of any human being', not "a very clever person." It doesn't mean much if you use it in the latter sense.

    Here's a thought for you all though, what if there's a law of diminishing returns on intelligence? What if it takes 100x more 'CPU power' to get 2x smarter? That may well be why humans are kinda dumb, not because that was all we needed, but that getting any smarter could be exponentially more resource intensive. We may never be able to build something more than a little bit smarter than us.

  9. Re:That's simply not true. on What AI Experts Think About the Existential Risk of AI · · Score: 1

    ROFLMAO! I always love people that just drive by and say some variation of "your full of shit" without anything to back it up.

    And the whole "but nobody thought X could do Y" thing is worthless as well, its proof of exactly nothing. It isn't even evidence of anything.

    AI research in this day and age is focused in one of two basic approaches. Either its about understanding and emulating some specific low level neurological function, like facial recognition, or its about very narrow specific application of heuristics to a niche task, like weather prediction, fault analysis, etc. The closest things to general AI these days are stuff like autonomous vehicles where several systems are being integrated with some fairly complex control laws. NONE of these systems is aimed at any sort of general reasoning capability. I'm sure some of the things learned from building such systems WILL apply to more generalized reasoning systems, but its hard to argue that anyone even WANTS general purpose AI at this point. Certainly the fervor for it that was seen in the 60's through the 80's has long since evaporated as we came to a realistic conception of just how bloody hard it is, and how much we needed to go back and start with the most basic underlying functions before we could progress to any sort of real AI.

  10. Re:Need to understand it before it exists on What AI Experts Think About the Existential Risk of AI · · Score: 1

    I would think the more likely results of greater and greater embodiment of intelligence in IT systems is likely to be destruction of a large part of the human economy. The transformation of human society which results is most likely to be the big challenge. Machines will largely just do what we program them to do, humans are the monkey wrench.

    Of course I can see what you're getting at, the old "how do we know it works right?" problem. How do we know how to make systems embody our goals and values? This is a whole other vast question, we don't have models of how goals and values work, and won't until we understand basic reasoning.

  11. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    Just how much of the solution space have we explored with our technology? As much as nature has? You are at best just speculating. In any case the human brain is something like 5 orders of magnitude more energy-efficient and roughly an equal measure faster per-unit-volume than modern computers. Is all of that capacity used constructively? We don't know, but its a pretty good bet that this level of efficiency and power are roughly a prerequisite for human-level intelligence.

    As far as questionable assumptions, I'm not making assumptions, I'm drawing conclusions from examples found in nature, which is the only place we CAN draw them currently. That means I have evidence, and you have pure speculation. I don't disagree with you that your position is possible of course. However, we know so little that even if it is then it will hardly make a difference in timespan IMHO.

  12. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    So, what you're saying is we just have to worry about our kids! Huh, that isn't a headline...

  13. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    Well.... I think we can guess. Nature is pretty efficient in the course of time, and it hasn't developed any more efficient neural architecture than ours, which at the basic level is identical to a fish that lived 400 million years ago. So, my guess is you're going to have to do something at the order of magnitude of simulating the human brain with reasonable fidelity. Lets even assume that the people in Zurich have the level of fidelity correct, they would need all the computer hardware on Earth 5 times over and 1000 nuclear power plants to run a human-brain simulation.

    Now, obviously hardware improvements happen, and so perhaps in 30 years you'll be correct, which isn't THAT long, but its still out there, and then we still have to learn how to actually architect it to be useful for the purpose, it certainly won't be a Von Neumann type machine! We can imagine possibilities and we probably have the start on most of the pieces that would be needed but I'd say its pretty reasonable to believe that it will be at least 50 years before some research lab has it in their basement.

  14. Re:Need to understand it before it exists on What AI Experts Think About the Existential Risk of AI · · Score: 1

    Well, the world is always a surprising place, and I'm sure there will be surprises in the realm of complex data processing systems along the way. I'm not sure the right word for them would be 'superintelligences', who knows? The hazards and pitfalls are probably not exactly as we imagine them. Take the automobile, in the early 1900's when they were first mass-produced nobody imagined what we would have today. They couldn't have imagined 10's of thousands of traffic deaths every year on a vast world-wide road system. Nobody anticipated air pollution or AGW, etc.

    So, my guess is, whatever we imagine to be the worries today, the real worries will be at least somewhat different, maybe completely different (IE traffic fatalities were a problem in 1903, but AGW totally came out of left field).

  15. Yup! on What AI Experts Think About the Existential Risk of AI · · Score: 1

    The alien invasion nutters drive me crazy too! Imagine a race so powerful it can fling itself across the unimaginably vast gulf between the stars. What is Earth to such beings? There's nothing here you can't mine vastly more cheaply in some asteroid belt or on some moon somewhere, or out in the Oort Cloud, etc. With that kind of power you have no need to "find a place to live" etc.

    In all of these cases it is very wooley thinking combined with some atavistic fears. Truthfully even the most clever humans rarely think rationally. People imagine that somehow a Stephen Hawking is some paragon of super rational logical thought or something, but its just utterly not true. These guys are VERY VERY clever and imaginative, but they don't really have any extra special insight. Neither do AI experts, apparently.

  16. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    ROFLMAO! That's absurd because you have NO IDEA how that information is used to construct a human brain. It requires a very long and complex process, all the genetic material is is a 'key', nor is that all the information needed, there's the rest of the structure of the cell, which has been in existence for 4 billion years, uninterrupted. Think about it, from the first replicating cell the same cytoplasm has been passed on in every single one of the trillions of generations following it, you can't even make a single cell without that 'stuff'.

    In any case, lets grant that whole description of how to build an intelligence can be described in 800mb, just for the sake of argument. So what? How do you 'execute' this program? Even granting that you have an unlimited hardware and power budget, how do you do this? We are nowhere on the path to knowing the answer to that question. Nor do we actually understand that 800mb of data, at all really.

    I'm not impressed by such a superficial number, it means very little.

  17. How? on What AI Experts Think About the Existential Risk of AI · · Score: 1

    How do you build this 'idiot savant'? How do you give it 'motivation'? What do you tell it to work on? We are like stone-age man here, we don't even know about the atom and you want us to work on nuclear power? Its absurd.

    But what is even MORE absurd is the idea that if we could create such a process that we wouldn't be in control of it. The very notion that somehow an intelligence could 'reach out of the computer' strikes me as the uttermost level of boogeyman type nonsense.

    Here's a good analogy. You worry about 'making a more deadly virus' but we don't even HAVE a virus AT ALL right now. We would have to invent the very concept of a virus first, and we have zero idea about how to do that, beyond some incredibly vague hand-waving.

  18. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    Ah, those were the days, keypunches and batch processing. I really loved paper tape, it was the most fun.

  19. Re:Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 1

    What we are is incredibly complicated systems. I don't agree that humans are predictable, or reducible to any simple representation. In some sense I agree, we will learn to 'design' 'human' minds, and 'clone' (copy) them, but that doesn't make it terribly simple.

  20. Missing the key point on What AI Experts Think About the Existential Risk of AI · · Score: 4, Insightful

    Everyone is missing the key thing here. The question asked was "if a machine superintelligence did emerge", which is like asking "if the LHC produced a black hole..." There's nobody credible in AI who believes we have the slightest clue how to build a general AI, let alone one that is 'superintelligent'. Since we lack even basic concepts about how intelligence actually works we're like stone age man worrying about the atomic bomb. Sure, if a superintelligent AI emerged we might be in trouble, but nobody is trying to make one, nobody knows how to make one, nobody has any hardware that there is any reason to believe is within several orders of magnitude of being able to run one, etc.

    So, what all of these people are talking about is something hugely speculative that is utterly disconnected from the sort of 'machine intelligence' that we ARE working on. There are several forms of what might fall into this category (there's really no precise definition), but none of them are really even close to being about generalized intelligence. The closest might be multi-purpose machine-learning and reasoning systems like 'Watson', but if you actually look at what their capabilities are, they're about as intelligent as a flatworm, hardly anything to be concerned about. Nor do they contain any of the sort of capabilities that living systems do. They don't have intention, they don't form goals, or pose problems for themselves. They don't have even a representation of the existence of their own minds. They literally cannot even think about themselves or reason about themselves because they don't even know they exist. Beyond that we are so far from knowing how to add that capability that we know nothing about how to do so, zero, nothing.

    The final analysis is that what these people are being asked about is virtually a fantasy. They might as well be commenting on an alien invasion. This is something that probably won't ever come to pass at all, and if it does it will be long past our time. Its fun to think about, but the alarmism is ridiculous. In fact I don't see anything in the article that even implies any of the AI experts think its LIKELY that a superintelligent AI will ever exist, it was simply posited as a given in the question.

  21. Re:You must be joking on The Reason For Java's Staying Power: It's Easy To Read · · Score: 2

    int number = Integer.parseInt(System.in.readLine());

  22. Re:Verbosity is easy? on The Reason For Java's Staying Power: It's Easy To Read · · Score: 1

    So, what you want is a horribly type-unsafe mess which presupposes a specific type of encoding of the string (Yay ASCII or die!). Instead what you have is a robust type-safe mechanism where you can make it clear in code that you are decoding a string, or accepting a serialized Java object over HTTP if that was what you wanted to do. What you call 'excessive verbosity' I call "Computers are stupid, always tell them explicitly exactly what to do because if you leave it up to them, they'll fuck it up." and that philosophy means the line-of-business code I write is phenomenally reliable and often sails right through major changes in external factors without any problem because it was correctly written on day one. YOUR code OTOH blindly jammed binary data through some unknown default binary-to-text conversion, and when you want to make it work correctly? Now you have to write some hokey nonsense to defeat default incorrectness. That's all fine for the time when you want to write a one-off screen scraper to grab some data and you have one hour to do it. I've written a LOT of perl, but don't mistake Java's strengths for weakness.

  23. Re:Not easiest to read, but forgiving... on The Reason For Java's Staying Power: It's Easy To Read · · Score: 1

    Yeah, but they are a class of leaks which are generally not that hard to sort out. Now, I've seen a few ugly leaks in my time that had no really obvious source, but even then it was very easy to determine WHAT was leaking and HOW, even if the exact explanation of WHY was rather obtuse. Your average programmer can understand most of the common cases though, like "gosh I created a static list of unbounded size and put 9 billion object references in it, that won't work!"

  24. Re:"Easy to read" is non-sense on The Reason For Java's Staying Power: It's Easy To Read · · Score: 4, Insightful

    Right, but I would argue it extends far past easy to read. Java is easy to grasp. It is very clear which method will be invoked when you make a method call. It is very clear what the lifecycle of a memory allocation is and there's no question about who is responsible for managing that chunk of memory, etc. Its just VASTLY easy to code in Java. Now, the development tools/environment may not be as simple as scripting languages, which tends to push untrained 'do-it-yourselfers' into things like PHP where they can see some results on day one, but for the organization which has real business needs and develops code to meet them, Java is an excellent choice because in all respects its clear what things do and how they work. I can look at virtually any piece of decently-written Java code and understand it. At the very least I won't find out that it does something totally different than it appears, which is COMMON in C++.

  25. Re:"Easy to read" is non-sense on The Reason For Java's Staying Power: It's Easy To Read · · Score: 1

    You really cannot refactor something like this with a modern IDE and change the class names to something sensible? Ugh.

    I totally agree with you about Java though, its quite readable. I have a LARGE code base and I can hand pieces of it to people and they can grasp what it does. I won't pretend its a model of perfect design, like any large old code base it has plenty of stupid in it, but the classes make sense, the overall organization and design is pretty good, and even if some of the APIs and such aren't exactly what I would do today and certain practices are sub-standard on the whole it works well, survives refactoring without too much pain, and does what it is supposed to do. It will almost surely be in production for decades hence.