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  1. Replies
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    32962 n = 100

    32962

    n = 100
  2. Replies
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    32961 n = 10

    32961

    n = 10
  3. Replies
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    32960 n = 2

    32960

    n = 2
  4. Replies
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    32959 n = 100

    32959

    n = 100
  5. Replies
    11
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    32958 n = 10

    32958

    n = 10
  6. Replies
    11
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    32957 n = 2

    32957

    n = 2
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    You may wonder why spectral analysis is such a...

    You may wonder why spectral analysis is such a big deal.

    Mechanical and electrical structures respond differently to different frequencies. A very narrow pule be it electrical or mechanical has a...
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    It is good to talk shop again.

    Sounds like Hall effect non contact current sensing? Used it on power supplies for isolation.

    I appreciate clever solutions.

    Adding ..If I were to design it I would use a microcontroller to...
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    11
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    32955 n = 100

    32955

    n = 100
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    11
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    32954

    32954
  11. Replies
    11
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    32953 n = 20

    32953

    n = 20
  12. Replies
    11
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    32952 n = 2

    32952

    n = 2
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    The plots show square, ramp, and saw tooth waves...

    The plots show square, ramp, and saw tooth waves with increasing numbers of summation terms. Any finite number of terms will always have an anomaly.

    Interesting how sine sums can produce straight...
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    Gibbs Phenomenon

    Just when you thought it could not get any more interesting.


    Gibbs phenomenon - Wikipedia

    The Gibbs phenomenon was first noticed and analyzed by Henry Wilbraham in an 1848 paper.[5] The...
  15. Humans have no mating season, it is 24/7. Mama...

    Humans have no mating season, it is 24/7.

    Mama grizzly bears nurture young who learn behavior and what to eat by observation. It last for several years. Same with the big cats.

    Elephants appear...
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    What good is sexual freedom if you don't get...

    What good is sexual freedom if you don't get enough to eat and can't speak freely.

    No sale on the positives of the Soviet System.

    The Chinese CCP on the other hand turned the country around...
  17. I saw Stephen J Gould speak in Seattle at...

    I saw Stephen J Gould speak in Seattle at Benaroya Hall to a packed house. He died a few years later.

    He said one of his chronic complaints was the presentation of the idea that humans came from...
  18. Replies
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    A version in C of the DFT from the net { ...

    A version in C of the DFT from the net

    {
    double pi2 = 2.0 * M_PI;
    double angleTerm,cosineA,sineA;
    double invs = 1.0 / size;
    for(unsigned int y = 0;y < size;y++) {
    ...
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    32943

    32943
  20. Replies
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    32941

    32941
  21. Replies
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    A version with the proper scaling of time abd...

    A version with the proper scaling of time abd frequency. The spectrum for a 1hz signal lines up with 1hz in the plot, and the time domain signal shows a 1 second period.

    Looks lke some of he text...
  22. Archeology is like interpreting the bible. The...

    Archeology is like interpreting the bible.

    The science shows on archelogy are interesting and informative, but the speculations can be thin.
  23. Strip away the water and soil and the Earth looks...

    Strip away the water and soil and the Earth looks a bit like the moon , cratered.

    That humans emerged is the result of a long chain of events going back to the creation of an oxygen atmosphere.
    ...
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    Sounds like Hall effect non contact current...

    Sounds like Hall effect non contact current sensing? Used it on power supplies for isolation.

    I appreciate clever solutions.

    Adding ..If I were to design it I would use a microcontroller to...
  25. Replies
    19
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    I am aware of FM proportional to a voltage for...

    I am aware of FM proportional to a voltage for instrumentation. First time I heard of using AM, but it is simple and elegant.
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