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Sensei

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Everything posted by Sensei

  1. Love Universe, love humans, love your family.. then you can love your nation.. Not reverse..
  2. Hello! Michelle Obama for president? I don't see her reading text from prompter.. Regardless she do it, awesome speech. (except "it's the greatest country in the world" etc) Best Regards!
  3. Sensei

    Sully

    Pilots should be trained how to land on the water, or on the ground, not exactly in airport..
  4. As I said it depends WHAT is simulated. If every single particle is simulated, there must be storage to keep them all in memory. Normal programs allocate memory when they need them, and release them when not needed anymore. It leads to fragmentation of memory https://en.wikipedia.org/wiki/Fragmentation_(computing) (you can have 1 GB of memory, but continuous block of memory is f.e. 1 MB, so trying to allocate anything larger than 1 MB will fail, even though 1000x of free memory is available). or to out of memory situations https://en.wikipedia.org/wiki/Out_of_memory In modern times (after invention of MMU), virtual memory is used, if physical memory is gone https://en.wikipedia.org/wiki/Virtual_memory This memory can be extended during running of computer, by plugging more disk (USB).. One could press pause, and wait for disk to arrive, and install. It's not problem when program has been programmed to support such extension and pausing. OTOH, you have 1 gamma photon >1.022 MeV on input prior pair production, after pair production, there are two electron and positron particles to simulate. Increased quantity of particles to bother. Situation is even more "funny" if you try to analyze proton-antiproton annihilation.. Up to 13 (unstable) mesons can be made from this reaction, and each of meson could decay to even more particles (13*2 = 26, 13*3=39) From 2 input to ~40 output? Good that they decay so quickly and annihilate... I would say, quantity of rules (physical laws?) is very small. Very very small. It's code (program) of simulator. It's quantity of particles-quantum objects that's tremendously high. If simulator has to simulate behavior of every single one. (One can imagine plentiful optimization techniques: f.e. instead of processing every single particle independently, group them by velocity vector, if it changes particle goes to different group) Observable universe mass is 10^53 kg https://en.wikipedia.org/wiki/Observable_universe with mass of single proton ~1.66*10^-27 kg https://en.wikipedia.org/wiki/Proton It gives 6.022141*10^79 protons quantity. After fusion simulator don't have to bother about two particles, but just 1 fused nucleus.
  5. Amnesty International about situation in Turkey http://www.dailymail.co.uk/news/article-3705904/Turkey-coup-plotters-tortured-held-stress-positions-denied-food-water-medicine-says-Amnesty-International.html erdogan committed war crimes and should be arrested ASAP, as he lands anywhere outside Turkey, accused to ordering torturing, beating, raping, etc. arrested oppositionists. His immunity is void from now. So the same members of government and PM.
  6. In the all my computers, I don't have left side case panel... If you will start hearing weird noise from power supply fan, disconnect computer, dismount power supply, replace its fan. The last time it cost me 17% ($5) of what new power supply cost. Power supply failure is the most common AFAIK thing that is destroyed, because its fan is stopping working, causing it to overheat, and failure of power supply could further damage computer board or other resources connected to it (outside of tolerance voltage for short period of time). If you're electronic engineer, how about putting inside power supply near fan microphone, and then wire to computer USB, and write little application which will be sampling and analyzing sound, compare with how to should sound, and detect anomalies in it and warn you that it's not working properly. It could be fun little project.
  7. That depends on what exactly is simulated. In games, engine doesn't render entire world around players, where nobody look. Just what player see at the moment is processed and rendered. After rotating head, moving body to other place, it's gone, not processed. Technique f.e. back-face culling https://en.wikipedia.org/wiki/Back-face_culling saves 50% of CPU/GPU time straight away even from what is directly in front of head of player. To have very large landscape game engine splits them to blocks. Say we have 100x100 blocks. 1 block is what player can see by naked eye. If we have f.e. 1 million polygons per block. All blocks have 10 bln polygons. But player can see just 1 mln where he/she is at the moment. 10,000 speed up. Everything to limit needed calculations. Things like fusion in star, does not need to be simulated to every particle, as nobody will observe these reactions with such detail.
  8. It's exactly what I said many years ago: http://www.scienceforums.net/topic/86677-properties-of-photons-split-from-looking-in-telescope-to-distant-star/#entry839195
  9. Misleading Frame of Reference in Special Relativity. Suppose so we're on board of rocket R, traveling in cosmos from object B to object A. To simplify let's assume that A and B are stationary each other. Object A is sending red photons with wavelength 700 nm. Object B is sending violet photons with wavelength 400 nm. (you can choose any other pair) Rocket after acceleration can reach such velocity, that red photons from source A are blueshifted to the same energy as violet photons from source B are redshifted. Blue shift equation in Special Relativity: [math]f=f_0 \sqrt{\frac{1+v}{1-v}} = f_0 (1+v) \gamma[/math] Red shift equation in Special Relativity: [math]f'=f_0 \sqrt{\frac{1-v}{1+v}} = f_0 (1-v) \gamma[/math] We need situation when f=f' to solve for v. [math]f_R \sqrt{\frac{1+v}{1-v}} = f_V \sqrt{\frac{1-v}{1+v}}[/math] [math]f_R (1+v) \gamma = f_V (1-v) \gamma[/math] [math]f_R (1+v) = f_V (1-v)[/math] [math]f_R+f_R v = f_V - f_V v[/math] [math]f_R v + f_V v = f_V - f_R[/math] [math]v(f_R + f_V) = f_V-f_R[/math] [math]v=\frac{f_V-f_R}{f_R + f_V}[/math] Convert [math]\lambda_R \lambda_V[/math] to [math]f_R f_V[/math]. And solve equation. It'll give v=0.27272727c [math]f=f_0 \sqrt{\frac{1+0.27272727}{1-0.27272727}}= 529.15 nm[/math] If somebody would wake up, have amnesia, born etc. in the middle of travel, and would see green photon from A, and green photon from B, or even entire blackbody spectrum from A, and from B, but at completely different temperatures (thus different peak), he/she could get (misleading) conclusion that there is no relative motion, and either A, B and R are stationary each other.
  10. I loaded photo "The Waving Flag" from your link, to Photoshop, and used magic wand tool, with 0 tolerance, to check what are colors in black cosmos space area. And this is what I got: On the right Info panel there is mentioned color f.e. 1,1,1 (RGB) or 1,3,2. JPG is introducing errors in image after compression/decompression, so single pixel difference will be blended to a few pixels around it. Does it look familiar to somebody, some star constellation, especially 4th screen-shot from the top.. ?
  11. You're thinking about larger usage of oil for tractors, but farmers could make their own fuel from f.e. wastes from previous years, turn them to ethanol or other fuel, and burn it in modified engines of their devices.
  12. Escape of the planet.. ? Global warming is result of burning coal, oil and gas, not exactly result of larger population of humans. Production of more food require more CO2 from the air. You're making equal sign between overpopulation and over-consumption (of things other than food). Nobody needs new smartphone every year. Except the large companies making them, advertising them, supporting them,etc, and their shareholders. It's burning fuel and making plastics (that's later throw away instead of turning back to usable hydrocarbons) what is the main problem now. Solutions for this are simple: 1) electric cars, trains, devices 2) electric from the Sun or other renewable source 3) solar panels at the roof of every house 4) returnable plastic bottles 5) gathering and turning plastics to usable hydrocarbons 6) free public transportation, at least in city, will reduce cars, traffic, optimize usage of buses,trains, if people won't have to look at pocket while entering them In China it didn't work as everybody wanted to have boy, and now have result of this, in absence of females for their males.. http://edition.cnn.com/2012/11/14/opinion/china-challenges-one-child-brooks/ "As a result, approximately 30 million more men than women will reach adulthood and enter China's mating market by 2020."
  13. Reaction of Lithium with water: Lithium floats on the surface of water, so it has smaller area contact with water than if it would sink. Comparison of alkali metals video https://www.youtube.com/watch?v=HvVUtpdK7xw
  14. But it's unstable isotope and will decay to Ar-38. Half-life 37.24 min. Chlorine-38 -> Argon-38 + e- + Ve + 4.91645 MeV
  15. You made statement, so it's your job to support it by data. "Believe" is good in Religion section. We're not in this section. Have you been personally at Fukushima after accident happened and instructed rescue teams what they have to do.. ? Sea water has obviously NaCl, Cl has two stable isotopes Cl-35 (~75%) and Cl-37 (~25%). If you will bombard Cl-37 by free neutrons, there will be created Cl-38.
  16. In the classic physics, two charges the same sign, repel with force that's inversely proportional to square distance between them. The shorter distance, the stronger repelling force. Force between two point charges: [math]F=k_e\frac{q_1 q_2}{r^2}[/math] (you can easily show it in scalar and vector form) Remove one q from equation to outside: [math]F=q_1 k_e\frac{q_2}{r^2}[/math] [math]F=q_1 E_2[/math] This gives electric field equation around 2nd point charge: [math]E_2=k_e\frac{q_2}{r^2}[/math] and second one around 1st point charge: [math]E_1=k_e\frac{q_1}{r^2}[/math] If you can program C/C++, make 3D OpenGL application which is visualizing them as vectors-arrows pointing in one or other direction, in 3D array, with editable point charges, and instant update of arrows representing forces at various distances around them.
  17. Bad. See where are areas were is more sense building such installations: they have small population which could use energy produced this way. If NY area has 5 times smaller power per area unit, it means 5 times more installations will be needed to have the same result as in "hot areas". Map of population is nearly inverse of "hot-cold areas map" from 2nd post.
  18. Have you seen map "geothermal power potential united states" with scale watts per m^2 NY area has 4-5 times smaller potential than the hottest area..
  19. You would need induced radioactivity https://en.wikipedia.org/wiki/Induced_radioactivity f.e. Deuterium can be split on demand to free proton and free neutron, it requires 2.22 MeV energy at least, free neutron is absorbed by some other element around, but newly produced isotope can be unstable, and decay soon releasing even more energy than invested to split Deuterium in the first stage. Neutron activation https://en.wikipedia.org/wiki/Neutron_activation
  20. It's great to see that Portuguese are so pro ecologic. It's exactly reverse direction to which we are heading, because of incompetence and stupidity of current government..
  21. If you play a game, does game exist? (not talking about CD/DVD/disk memory used to store code&data) Code loads data from disk, or generate stuff on the fly, or both. Then game is run and everything is displayed. Does 'game' exist.. ?
  22. Well, that's very easy to calculate. [math]P{( r )}=\frac{P_0}{4\pi r^2}[/math] [math]P=\frac{E}{t}[/math] [math]E=\frac{hc}{\lambda}[/math] Remember that P0 is initial quantity of photons multiplied by their average energy, divided by time 1s. After dividing by area, unit is W/m^2 Solve r for E=h*c/532nm=2.32 eV (average visible photon energy) [math]r=\sqrt{\frac{P_0 \lambda * 1s}{4\pi h*c}}[/math] [math]r=\sqrt{\frac{P_0 * 532*10^{-9}m * 1s}{4\pi 4.135667*10^{-15} J*s * 299792458 \frac{m}{s}}}[/math] Detector with area 1m^2 should detect 1 photon with average energy 532 nm every 1 second at this distance from ideal light point source.
  23. People would have to know (and remember) how not simulated Universe is working to being able to compare to simulated version of it, to find differences.
  24. Then you should have no problem providing links and examples here on forum so we will learn about these "nonsenses".. Waiting to see data you're talking about.
  25. After adding death sentence to codex. It's just a matter of time when this punishment will be used to kill "traitors", anyone who is upset at the government, which means killing the all democratic/non-democratic opposition. In Turkey judges have been arrested or replaced, the rest terrorized, scared to obey orders or they will end up the same.. What meaning will have sentence given by such "judge" that remained in office.. ?
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