Danijel Gorupec

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  1. Lol... and I am still searching for the "unwanted porn"... It seems that google only provides misses.
  2. 1. I think the opposite will be the trend - much smaller cells (sometimes maybe room-sized). 2. Yes. But unless we find some new 'toy' to spend the bandwidth, I don't see a need to increase it that much more. Our senses have limited ability to absorb information. 3. Yes, because base stations will be closer and no need for mobile phone to use a high power transmitter. 4. Distance signal travels will decrease (denser network of base stations). The power for hand-held devices will be further reduced, of course. Free of cost? Not really, but maybe governments will decide to 'give for free' (on the budged expense - which of course is not free). (maybe unrelated, but with high-enough network of base stations, the system may become a serious competitor to GPS systems).
  3. Maybe you are right... I must admit I am undecided. (This could be a topic for some other thread.)
  4. Odd way you said this... There is no clean power. Just less dirty one.
  5. Except that my guesstimation was wrong by factor 4. The actual result should be more like 85+85 tons... Which is more than was the mass of the full shuttle orbiter... So I guess it is all ok then.
  6. My guesstimation is that it would take about 22 tons of matter + 22 tons of antimatter at the halfway-to-moon distance to make some serous damage on earth. This is based on total irradiation energy equivalent to the energy released in 1000 megaton explosion... 1000 megaton seem quite a lot, but when distributed over the whole earth's disc, I don't think it would be deadly (but I guess some significant damage will be done). The Space Shuttle had considerably more mass than this, so its explosion (supposing half matter half antimatter composition) would cause serous damage on Earth surface. Possibly global-scale fires. (It would not event touch the solar system - the sun converts 4 million tons of mater into radiation every second)
  7. All true, I agree...but the essence of the Fermi paradox ,as I see it, is: if at least one civilization managed to develop a method of interstellar spreading, there is nothing to stop it until it takes the whole galaxy. So it should be here too. (Interestingly, such spreading machines do not even have to be intelligent - they only have to have a 'will' and the ability to spread) I am not a very optimistic guy, but I still think that, according to our current course, within 200 years we should have self-optimizing machines capable to overrun biological evolution.I don't know what might follow, but I suspect that for a machine, the interstellar travel is not such an unthinkable endeavor as it is for humans. [Well, because no other civilization seem to be present here, I might speculate that either human-type tech civilizations are very rare, or something very bad will very likely happen to our civilization in next several hundred years..]
  8. I never understand why people continuously consider the future without intelligent machines. Like if it won't happen. I cannot even imagine an advanced civilization that does not almost exclusively consist of intelligent machines. Machines that copy and redesign themselves in millions of different directions - some large as moonlets, but most as small as sand particles. Enormous amount of them, billions of billions. This is how I understand Fermi's question: where are those intelligent machines, vast swarms of them that are spreading thought the galaxy in a diffusion like manner (not where are those 'bags of protoplasm' with their rockets)?
  9. My proposals would certainly need some refining However, regarding my second proposal... I actually think that politicians are responsible for the future, even including who replaces them. For example I consider Obama positive and intelligent politician, but I find him unsuccessful about securing continuation if his policies. Maybe he was simply not smart enough to recognize that society tends to spring back... A more extreme example: Marcus Aurelius was considered a smart and wise ruler, yet he secured his son as his successor... shouldn't he 'suffer' for his decision (if he continued to live) by receiving smaller salary? (But anyway, my proposal is limited to certain number of years - depending on the inertia of the macroeconomic cycles - not more than that.)
  10. Law1 (to combat impulsiveness of common people): referendum questions must come in pairs - each part of the pair is to be composed by opposing proponents. The vote counts only when both questions in the pair are voted adequately. Law2 (to combat short-aiming policies of politicians): salaries of politicians holding office extend to a period even years after they left the office and depend on measurable performances of the state and society (like GDP, life expectation, etc..)
  11. I too expect the most from solar in short term (20 years). Although I am not nearly as optimistic as Phi for All In parallel as we are expanding the solar network, we need to improve on other fields: energy storage, energy transport and... agricultural yield. We might also need to improve recycling of solar panels to avoid garbage buildup. In my opinion, solar is the most plentiful of all renewable resources and thus makes the most sense. The one intrinsic problem with solar, as I see it, is that it uses land (people tend to live near fertile land - so you either need to 'spend' this fertile land for solar, or you must build solar far away from people). Other intrinsic problems with solar is that it is weather dependent and will only work half-day shifts. I also expect wind energy to continue to grow - it complements solar nicely. Now the pessimistic part... it really scares me when I look behind and I see some 25 fold energy consumption increase in last 100 years. No known renewable can cope with that. We may hit a development ceiling... While I don't think we need to continue at that rate, even 5 fold increase in next 100 years would be difficult.... The only way to continue our current development pace for next 100 years, as I see it, would be to employ fusion energy. We are however far behind the schedule, imo.
  12. In his chapter 26, volume 2 ( http://www.feynmanlectures.caltech.edu/II_26.html ), Feynman produces an equation that, I guess, shows the x-component of the electric field of a moving point charge... equation (26.6). He then says that the electric field of a moving charge is 'oblate': its parallel field being somewhat weaker, while its perpendicular field being somewhat stronger. Fine. In the same chapter, further below, he makes a table of Lorentz transformation of fields (table 26-2): I would expect the two results match, but I don't see how. According to the transformation table, the x-component of the electric field of a moving point charge should remain unchanged (E'x=Ex), yet according to equation (26.6) the x-component weakens a bit. What am I getting wrong?
  13. Thanks for the article link. Regarding the three divers... I read somewhere (hardly I would be able to find it again) that the three men considered it their duty - two of them were on theirs shifts, while the third one was called for his specific knowledge. I would still consider the act possibly heroic. If it is made 'in vain' does not diminish this. If it is made on the line of duty also does not diminish this.... Interestingly, only recently Ukraine recognized the act: from wikipedia: https://en.wikipedia.org/wiki/Individual_involvement_in_the_Chernobyl_disaster " Despite severe risk, all three survived the mission, and, in 2018, were awarded the Order For Courage by Ukrainian President Petro Poroshenko." [BTW, the same wikipedia page mentions another involvement of Aleksandr G. Lelechenko " ...to spare his younger colleagues radiation exposure he himself went through radioactive water and debris three times to switch off the electrolyzers and the feed of hydrogen to the generators..." Well, if this is true (I am not considering Wikipedia overly reliable) then I would consider it heroic - note that his act was volunteered and not asked for, for the difference]
  14. Unfortunately not (I hope I will soon)... I did not clam you are wrong. I was just surprised how quickly you confirmed all the fact from the movie (It is a long movie, while your words were "Correct and accurate on all counts" - a statement quite opposite to my experience with commercial wide-audience movies. You understand my surprise.) BTW, I am not sure what this thread is all about, but if it is about discussing how factual is the movie, then you can point out several things that you think might be worth discussion.
  15. Did you use the scientific methods in your research or did you just look for (and found) materials that confirm events in the film?