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My expansion cloud chamber movie

  1. Nov 10, 2013 #1
    Hi all,
    below is a video showing a compilation of many expansions of my Wilson cloud chamber.
    The tracks shown are mostly alpha and cosmic rays. The chamber uses a rubber bulb from a turkey baster as the expansion piston. The object in the chamber is a cork with a radium paint coated pin. I'm using a constant clearing field ( not turning it off during expansion ).
  2. jcsd
  3. Nov 10, 2013 #2


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    Please don't add music to videos, youtube will block the movies in Germany and I guess the music is not relevant anyway.
  4. Nov 12, 2013 #3
    Decay or collision process shown at 16.73 seconds

    I acknowledged the third party music content on youtube so the ban in Germany should be lifted.

    I think a decay or collison process is shown at 16.73 second into the movie.

  5. Nov 12, 2013 #4

    D H

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    Do you pay royalties to that third party source for each person that views your videos? Did you ask that group if it's okay to use their music without compensation? I strongly suspect the answer is "no". Acknowledging that you stole something does not make the theft okay.

    Did you renegotiate the contract between youtube and GEMA? I *know* you didn't do that. Your video will remain blocked in Germany until that contract is renegotiated or until you remove the music from your video.
  6. Nov 12, 2013 #5
    Copyright holders submit to youtube samples of their copyrighted material for example music and video files. Every video uploaded to youtube is scanned for a match against this database of samples. If a match is found the person who uploaded the video can deny or acknowledge the match. If he acknowledges the match, he agrees to the terms and conditions that the copyright holder has established for this specific piece of copyrighted material. I acknowledged the match and the terms and conditions that the copyright holder wanted was an ad to be played after my video is played saying you can buy this music from amazon. This process of acknowledging the third party match was called by youtube a “win win” because the copyright holder gets free advertising and the person who uploaded the video gets to use the third party copyrighted material. In some cases the copyright holder wants the video containing the copyrighted material removed from youtube. In this case the person who uploaded the video get a copyright strike against his youtube account and starts to lose permissions to do things on youtube. Before I acknowledged the match my youtube video manager said I had an copyright ID match and the video was banned in Germany. After I acknowledged the match my video manager said that the third party content was acknowledged and it no longer said the video was banned in Germany. I also noticed the ad that now shows up after my video plays. I was going to remove the music from this video but the more I learned about the copyright ID match and acknowledge process I decided to leave the music in. Considering that youtube call this a “win win” am I wrong?
  7. Nov 12, 2013 #6


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    I don't know who wins, but the video is still blocked here.
  8. Nov 12, 2013 #7
    Are you in Germany?

  9. Nov 12, 2013 #8


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    Staff: Mentor

    I am.
  10. Nov 12, 2013 #9
    I'm sure you're aware that there are solutions to blocked YouTube videos.
  11. Nov 12, 2013 #10
    Here is a version without sound:

  12. Nov 12, 2013 #11
    Here is a frame from the expansion cloud chamber movie that I think shows a collision and/or decay. The range and ionization of the two collision/decay products seem consistent with the alpha particle energy from the radium paint coated pin. However I don't see the alpha particle track leading to the collision.


    Attached Files:

    Last edited: Nov 13, 2013
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