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Sensei

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Everything posted by Sensei

  1. WHY would anyone start eating bacon??? It has way too much fat.. Maybe tiny (30% of single slice), cut into cubes, as a base for making scrambled eggs, instead of oil. In the past, education was only for elite. It's easily visible in statistics of illiterate persons graph with years/centuries on X axis. After late XIX it changed and public primary schools appeared for either poor and rich people. US data split to race http://nces.ed.gov/naal/lit_history.asp Now it is time for Universities for free..
  2. Capacitor in reality is gap in circuit, gap made of air, gas, vacuum, insulator. On the first electrode, electrons gather, and can't travel anymore, as there is gap, on the second electrode, electrons escape (electronical engineer would say "hole"). If too many electrons will gather and/or gap is small, electrons will fly through gap, and if it's made of insulator the most likely damage it, and capacitor won't work anymore correctly. You should read about breakdown voltage of insulators https://en.wikipedia.org/wiki/Breakdown_voltage For controlling brightness usually there is used variable resistor. https://en.wikipedia.org/wiki/Potentiometer Interesting element is also Varistor https://en.wikipedia.org/wiki/Varistor
  3. Okay. It's your vision. But what with your experimental knowledge in this area? Can you tell us, using your own words, how quantum physicists are checking what is charge of some stable or unstable particle... ?
  4. Resistor is limiting current I. I=U/R Say we have voltage U=5 V, and resistor has R=100 ohm, current I will be 5/100=0.05 Amperes. 50 mA (miliamps). https://en.wikipedia.org/wiki/Ampere Current multiplied by time, is Charge Q (unit Coulombs). Q=I*t https://en.wikipedia.org/wiki/Coulomb Q divided by elementary charge e=1.602*10^-19 C, is quantity of electrons. Q/e https://en.wikipedia.org/wiki/Elementary_charge If through circuit there is flowing 1 Ampere current, during 1 second period of time, it means there is 6.24*10^18 electrons flowing through it. Electron flowing through some element, especially resistor, is losing part of its energy, and it's dissipated, and usually observed as heat. Therefor large power resistors have heat sink or even fan. Sometimes it's useful, when we need to heat liquid, like it's in heating element, in coffee/tea making devices. https://en.wikipedia.org/wiki/Heating_element Which is basically resistor with very large resistance. 1000 Watts power heating element with voltage U=230 V in the mains, has to have resistance around 53 Ohm. I=4.35 A U=230 V P=4.35 A * 230 V = ~ 1000 W R=230 V/4.35 A = ~53 Ohm.
  5. For me it sounds you're trying to beat somebody who is already laying on the ground.... I met you in the gym, half century ago, in high school... I was the one you kicked when I was lying down.. Making compressing routine without making decompressing routine to check whether compressing routine is working fine, is nonsense, but you don't have to tell anybody...
  6. EdEarl, I am giving you even +100, you're thinking and going in the right direction, so far, people should find a way to optimize costs of making food, and at the same time, making food free of the charge. Literally free of charge. Nobody in this world should be dying hungry....
  7. By Gantry crane I meant device moving in one axis on the rails, in say axis "X", and with "header" moving in axis "Y", and up and down in axis "Z". Similar like 3D printer/plotter works. with some space between the rails. Distance between rails could be 5m, 10m, 20m. It doesn't matter. With some predefined "actions" made on vegetables. The important is how it's controlled and what "header" can do from control room. It's one time investment. But it needs pretty flat/neutralized ground. Somebody who finished engineering/robotics could make such device by himself/herself using 3 engines from scrapyard, for a fraction of price company would build it (as they need to have income and have to pay tax). Or one time neutralization of the ground.. To make it pretty flat, and possible to put rails in the ground, and further crane. Such cranes would allow 3D in vegetable plantation. Several layers of plants at various height above the ground with hydroponic techniques. Or even in towers 200m+ height. Each floor separate Gantry crane. With transparent the all walls and the all floors, so light from the Sun can enter inside.
  8. One could make compilation of Gantry crane with plantation of vegetables. If more farmers would be acustomized with hi-tech, the faster such devices would be build.. Future farmer could be clicking on the screen, telling crane where to move, what action to do in location below it.. Or run script from file.. Whether it should plant vegetable, or remove bugs, or harvest. While sitting in the control room far away. And just looking at monitor and digital camera.
  9. Lossless compression algorithm must have just one output from given input uncompressed data. And have just one output from given input compressed data. If compressed data (or hash value) will have more outputs than 1, algorithm won't be able to tell which one to use. It's very similar situation as with Bijection, Injection, and Surjection https://en.wikipedia.org/wiki/Bijection https://en.wikipedia.org/wiki/Injective_function https://en.wikipedia.org/wiki/Surjective_function OTOH, it allows making even more efficient compression algorithms. Say we calculate hash from some input data. And there is finite amount of hash values, corresponding to some uncompressed data. After introducing index which output is right in table of the all outputs possible to make from some input data, algorithm will allow to have exactly one the right output. Lame example of this is keeping index to prime number, starting from 2,3,5,7,11,13,..... (with indexes 0,1,2,3,4,5) after a while as we progress, index to prime, will have less bits needed than prime number (thus compression of data)..
  10. The all human history is known only from the books that remained millennia and centuries, from remaining sculptures, graves, rocks used to be somebody house in the past, from remaining cinders of ancient cities.. It does not render automatically the all people who built them not existing persons.. Prophets can be self-made. Which does not render them not existing physically persons. Somebody read prophecy, and found himself/herself fitting in the story, and acting accordingly to prophecy. How ISIS called their newspaper? Dabiq. From prophecy... https://en.wikipedia.org/wiki/Dabiq,_Syria http://www.dailymail.co.uk/news/article-2786039/The-1-300-year-old-apocalyptic-prophecy-predicted-war-Islamic-army-infidel-horde-Syria-fuelling-ISIS-s-brutal-killers.html
  11. You need to have either compressing routine as well as decompressing routine, then run them on large amount (say few hundred thousands) of files on your disk, and compare whether compressed then decompressed data equals to original data prior compression (yet another routine which you must make and check whether it works correctly), to be sure compression algorithm is not introducing some errors. Since you didn't provide decompressing routine, we can't check it in practice. But at the first sight, it looks to me as some kind of hash function, rather than compression algorithm. ps. Aligning to 16 bytes buffer size you can do using ((bytes.Length+15)/ 16) instead of (bytes.Length / 16) + (bytes.Length % 16)
  12. Sensei

    Maxima

    I see it could be useful. If it's command-line tool in the first place, maybe it would be possible to put on some Linux server, and make web page that will be executing it, with parameters entered in HTML form, and show output directly in web browser.. ? This way, there would be no need even to install it, anywhere we are. As long as Internet is working or smartphone has connection.
  13. Sensei

    Maxima

    Are you talking about this app? I am wondering: does it use 32 bit floats, 64 bit floats, or dynamically generated "infinite length" floats (limited by user in options or by available memory).. ? This annoys me a lot in f.e. OpenOffice. Try entering A1=1, A2=A1+1e-12, and fill down. You will see all 1.. (there is needed 1e-10 step at least)
  14. That's correct. Why are you saying so? It's not true.
  15. It's called non-photorealistic rendering https://en.wikipedia.org/wiki/Non-photorealistic_rendering And example of it is cel shading https://en.wikipedia.org/wiki/Cel_shading Used computer has nothing to do with effects (as long as it is fast enough (Macs can have 6 cores) and 3D application with plugins is available for it). Cel shading is pretty fast, definitely much faster to render than photorealistic rendering. Even single core 20 years old obsolete CPU can handle it (you would have to use older version of 3D app with plugins, modern probably require SSE2/SSE3) Studio making movie for TV/cinema, should have enough money to hire programmer who would make proprietary plugin for cel shading, with required by director and producer features.
  16. Mythbusters always started from small scale model, then if results were fruitful, they went for full scale. The first ever made Van de Graaff generator was made of tin can, to check if idea works. After confirmation they asked for grant.
  17. In Christianity there are seven deadly sins. One of the them is proud, proudness. https://en.wikipedia.org/wiki/Seven_deadly_sins Americans (US citizens, usually poorly educated) often say "I am proud of [here some meaningless thing]". Like "I am proud of my country" (if somebody would say so in front of me, I would show him/her comparison of imprisoned persons in US vs other western countries f.e.) But you should not mimic this behavior. Reverse to proudness is humbleness and modesty. If you know something good enough, it'll be simply visible in quality of your responses. Saying "I am expert, listen to me! [...]" is devastating your reputation. People like Mordred, Studiot and Strange, spend a lot of time replying for people posts, and searching for resources and materials supporting their words on the Internet. It's visible in quality of their replies.
  18. I am starting losing patience "how good expert you're in everything"..... Repeated over and over in every section of forum in the almost the all posts.. And everybody know I have almost infinite patience.. At the same time your English looks worser than automatically translated by Google. "Experts" don't have Firefox/Chrome with English dictionary and automatic spell checker? Top two replies to this thread were questions for clarification what OP meant, not replies with ready solutions.
  19. Which radiation do you have in mind? There is plentiful: alpha, beta, gamma, proton, neutron, cosmic rays, and more. If through conductor there is flowing current, there is created magnetic field around it. Superconductor will have it much stronger (much larger current possible to flow). As we can see in CRT, Cathode Ray Tube, electrons emitted by electron gun to chamber, their paths can be bend by electric field (gathered on metal electrode electrons or their absence), or can be bend by magnetic field (made by electromagnet on demand, polarized in one direction or other). But that works good for charged particles. Alpha has +2e charge, beta particles electron has -1e charge, positron +1e charge. Cosmic rays have typically +1e and -1e (mesons, 2nd and 3rd generations leptons, unstable baryons etc.). Gamma, neutron, and other neutral particles won't have serious problem entering to object protected by superconductor/conductor which is used to make electromagnet. To me shielding means ability to disallow particle to enter to inside of shielded object. If particle does not interact with shield, does not absorb, does not reflect, then particle will pass through it to inside no problem... It will be transparent. Rendering shield useless. See shield made of Gold foil for alpha radiation at 0:35 There is plentiful alpha particles on the left emitted by radioactive isotope, behind Gold foil on the right, there is much less (but still some are present). That's good example of shielding, against this particular type of radiation.
  20. I met Jesus year ago.. While waking street at night. Person said is Jesus. I was not angry, or anything like that, rather humorously asked him: - Jesus, what is mass of electron? He started staring at me, unable to answer, and said "go away!". So I said to him, Mass of electron is 9.11*10^-31 kg. But it's not exact. More exact is 510998.928 eV/c^2. Then I had to explain him what is electron Volt energy unit and how to derive it from Joule energy unit, and what is speed of light.... and then further quantum physics.... He kept staring at me for a while astonished.... I never saw him again.. Disappeared. Prior this "accident" I was seeing him every day, always on the same bench, the closest bench to the main country bishop's/cardinal's apartments.
  21. How about 5th answer: by viruses? That's the most typical way DNA are changed/modified on daily basis. Virus attacking cell, is replacing/modifying DNA, to its own introduced. So one can create virus which will replace your own DNA with your own DNA+some modifications. Instead of fighting with virus/bacteria one can replace its own DNA, the all cells, with DNA with modifications disallowing these viruses/bacteria to attacking you. Of course. That should be the aim for every intelligent person. That's what for believers pray in churches, to live after death. So why not live "forever", prior death, if it never happens? Again, I hear sound of "I would be bored to death by such forever life".... WTF?! Do you really REALLY have nothing to do? I am looking at these old persons, and plentiful of them are dead already, just eating food and drinking and breathing, but their mind is dead. They just wait for death.. Thinking about it day long.. That's really sad.. So much opportunities in this world Universe, and they WANT to die.. That's fucking unbelievable how stupid can be humans. Albert Einstein said "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe" Here I can perfectly agree.
  22. Actually not once, not twice, animals adopted their size to smaller island size by downgrading their size.. https://en.wikipedia.org/wiki/Insular_dwarfism https://en.wikipedia.org/wiki/Foster%27s_rule
  23. Don't you like challenges? Going from homeless/immigrant with "$10 in the pocket" to billionaire is harder than going from child of millionaire to billionaire.. (If wealthy is "aim" for somebody. That reminds me son of Buffett who sold Berkshire Hathaway stocks to become musician..) Going from "nobody known school" to f.e. Nobel prize, is more impressive achievement than receiving Nobel prize after Harvard...
  24. I would rather like to make aquarium for either big fishes and small fishes and watch them... Already done
  25. Actually you're looking at this from monotheistic point of view. In Ancient Greek mythology, f.e. god Zeus was created by Cronus and Rhea.
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