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Posts posted by Przemyslaw.Gruchala

  1. But... I just spend six consecutive hours at a desk, not doing antything with my lower body, and when I finally stood up, my right shoe's laces were untied.


    How did that happen? I thought an object at rest (the shoelaces) would remain at rest until acted upon by an outside force (e.g. my feet moving).


    Your foot is in almost constant move even though you don't walk.

    Everybody is wriggling. Changing position of body sitting.

    People in hospitals that can't wriggle because they're unconscious, paralyzed, have bedsores.


    Tie shoelaces on shoe that is not on your foot, and then check it after hours or days whether it's still in same state. Then you can confirm or deny that it's untying spontaneously.

  2. Just stunning. What language did you write this in?


    I write everything in C/C++.

    In mine work I require speed even from the smallest tasks.

    In the '80-'90 years I was writing stuff in assembler.


    1 frame of animation without motion blur is rendering in 3 minutes on Core i7 930.

    It has 16 passes of anti-aliasing and resolution 2048 x 2048 = 4.2 mln pixels * 16 = 67.1 mln internal code executions.

    With motion blur it's going to ~35 minutes per frame..

  3. It must be some kind of cultural thing? I mean, the ancient Romans had the same brains as we have today. But they never invented steam engines or started an Industrial Revolution.


    To make invention there is (usually) required 'need' for it.


    f.e. some nation is living on island, separated from other lands, at some time of their history they will need to invent boat. Like Greeks and Great Britain people.


    At modern times we usually have financial need to optimize something.

    More automation means less people working on some task,

    less money needed to hire them, and higher income for owners of business.


    Romans had cheap slaves.

    If they would have to pay for their work,

    inventions and optimizations would appear quicker.



    The main idea here is that we should go to great lengths to test our laws in physics,


    We have such devices with great distances from us - satellites, such as Viking..



    If device is programmed to immediately answer with confirmation message as soon as it gets command from us from Earth, by observation of delay in reply we can confirm that radio waves have exact speed as we think they have and calculate exact distance to satellite.

  5. The all code on his website is tragedy- it's reading from and writing to illegal memory, exceeding array from both sides..


    If x=0 in first step of for() loop, then U[][x-1] refer to memory location which is at index -1 cell before array, causing exception..


    Spreading of temperature (the first code in the beginning) is showing equation


    ( temperature of cell 1 + temperature of cell 2 + temperature of cell 3 ) / 3 (3-number of cells that're used simultaneously)


    so if temperature of cell 1 is 1000, cell 2 is 0, cell 3 = 0

    after first t you will have


    then in another t, (333.3+333.3+0)/3=222 another cell (333.3+0+0)/3=111

    etc. etc. in the next iterations.


    Temperature of hot cell is increasing temperature of surrounding cells (and decreasing itself), then they're heating surrounding cells and so on, so on, until the all cells have equal temperature.

    Spreading of wave is done similar way.


    The funniest part of his code:



    U[ 1000 ][ 1000 ][ 1000 ][ 1000 ]; /* Note: 4 dimensions */"


    It's obvious he never ever tried to compile this code..

    Above line of code is allocating memory block of 8 TB (8 terabytes).

    Nobody have so much memory in any computer.

  6. I'm curious- would we as humans be able to survive without electromagnetic waves?


    The smartest one. Maybe. If we would have enough time to prepare for Sun no longer giving energy..



    Would plants still be able to grow?


    Do plants grow in hothouses? Yes they do. But we would have to give them other sources of energy..


    Also, visible light is one of the waves on the electromagnetic spectrum. Without it, would we only be able to see in black and white or would we not be able to see at all?


    We have artificial light sources anyway.

  7. Currently I am using database with just a few hundred thousands stars data from our closest area.

    If you have access to raw data (preferably txt format) easily parsed data with millions or billions star data, please reply with link to them or write to me PM.

    Data that are compressed, proprietary format, binary, not open, are useless.

  8. Hello


    I am programmer for 27 years, mostly in 3d graphics, games and ray-tracing visualizations of real world.


    Recently I started experimenting with simulating universe, rendering stars using star database that are freely available in the Internet.


    So far I came up with rendering Sirius, Orion, Betelgeuse stars which you can see below, renders and animation:


    Rendering in 3d without motion blur (zoom in to see stars):


    Full resolution is 2048 x 2048.


    Betelgeuse is pretty much in the center of this image.






    Rendering in 3d with motion blur:






    Animation 360 degree (it was rendered, 60 frames image sequence, in 4h on 8 cores computer)




    You need H.264 codec to see this animation.


  9. What is the evidence that these exist, or how would you detect them?


    Good questions.


    But first detect up and down quarks..


    controversial hypothesis: “ Unique sub particles”


    In fact one of twins is electric CHARGE, the second is square root of constant

    of gravity



    So you are postulating that Universe is made of just two elementary particles?


    And one of them is electric charge is -1 (so two of a kind are multiplying and giving +1?), and yet another one neutral is giving mass?

    Does particle giving electric charge also influence mass or not?

  10. But that's simply not true. An electron, obeying classical physics and orbiting around a nucleus, will give off electromagnetic radiation by the Larmor formula. Since it is constantly radiating away energy, it will eventually spiral into the nucleus. Thus, stable classical atoms cannot exist.


    Does Earth orbiting Sun is constantly radiating energy and eventually spiral into the Sun?

    So even in classical physics such orbiting is possible..


    And in some cases electrons really radiate energy and fall into nucleus - it's electron capture.



    completely self-constrained space displacement current can be used to explain the photon.


    I didn't follow this thread. Sorry if it has been answered already.

    So you don't believe that light wave is made of photon particles really existing as "particles".. ?

  11. Do computers only work in 2-d mathematics?


    Computer work on one integer or two integer arguments and outputs 1 result. 1 dimension operation in single instruction.


    Everything else is simulated.


    SSE extension to CPU introduced built-in operation on vectors 2d (2x 64 bit) and 4d (4x 32 bit) at the same time.



    By python gui are you referring to the shell interpreter or an actual gui?

    Python is joke. Anybody serious is using C/C++ which is thousands times faster...


    DevilSolution, I like your approach.

    Calculate the all possibilities, and then judge them picking up the best one and output.

    That's how chess game AI works.


    But you need to be really advanced programmer (or have $10k+ per month to hire such)..

  12. .


    The second as the reference unit of time, was defined as a time equal to 1/86400 part of the Earth’s day , which later for practical reason, was adopted as 192 631 770 periods of radiation corresponding to the transition between the two levels of the ground state hyperfine structure of atom cesium-133 at rest at 0 K and at standard gravitation on Earth.


    9 192 631 770 periods not 192 631 770...

  13. Faster radioactive decaying of particles when there is shower of neutrinos during Sun eruption suggest that it's all because of neutrinos.

    65 billion neutrinos flying through each cm2.




    Experimental scientists should search for materials that would be shield for neutrinos.

    If it's correct thinking, after putting radioactive or unstable particle inside of shielded area we might see they are perfectly stable.

  14. I personally never met a "Quack" I did not like.

    On the other hand I have mingled with so many PHD's of all sorts of fields, and

    I would say more than 99% of them are a soulless, uncreative, boring, robot-like

    and let me add dumb (it is better than the acronym pun). “Quacks” have the

    opposite characteristics even if their tries are unsuccessful, at least they

    try. And let alone the rest of the population, the Kardashians (or some other

    BS) adorers.


    There are "Quacks" which talk with sense, they spend a lot of time on research and learning,

    "Quacks" that didn't read anything, but "they have theory!",

    and "Quacks" that are persons with mental problems.

    Did not one guy showed video recently where he is saying he is god? wink.png

  15. Imagine that meteorite, comet, sun activity or intergalactic activity is killing organisms. 99.99% of them.


    If organism is so big as dinosaur or whale 99.99% from 1000 living organisms around the world is 999 killed animals. Too small to continue species.


    The smaller organism the more quantity, 99.99% from 1,000,000 is 999,900 killed, and 100 alive.


    Additionally - big organism need a lot of energy to survive.

    If during accident vegetable-only eating animals will die, due lack of vegetables,

    for a short period of time, big meat-eaters will have enough food,

    but after 1-2 weeks, meat will be not fresh and not eat able and they will die too.

    Small size everything eating organisms less specialized such as rats will have food for longer time.

    Due to larger initial population prior accident have more chance to survive.


    and not extinct crocodiles


    Crocodiles are eating even ill dead hippos.

    Additionally living mostly in water, so they have fishes.

    They don't waste energy, remain inactive most of time, could starve for months.

  16. But higg's fields don't act quite like that, because objects have varying mass, it makes more sense mathematically that more massive objects couple with a greater amount of individual higgs.


    Exactly. That's mine route of thinking too.

    The more neutral particles added, the more mass and therefor the more influence on space.

    Amount of neutral particles varying between particles.

  17. No. quarks are only one of the irreducible representations associated to the known zoo of elementary particles and the interactions involving quarks are limited as well



    The truth is that if they would be really irreducible pion particles wouldn't decay spontaneously..

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