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| "Veritasium" (YT) - "The Big Misconception About Electricity" ? |
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| snarkysparky:
https://lpsa.swarthmore.edu/BackGround/phasor/phasor.html#:~:text=A%20sinusoidal%20signal%20f(t,a%20rotational%20velocity%20of%20%CF%89. |
| adx:
=SIN(3.1415926) 5.35898E-08 |
| adx:
And the cesium clock. |
| TimFox:
--- Quote from: adx on April 13, 2022, 03:32:54 pm ---=SIN(3.1415926) 5.35898E-08 --- End quote --- In a computed-tomography application, one of our software engineers used a value of pi defined to 7 decimal places instead of the compiler's function PI(). Unfortunately, he was off in the last decimal place. Computed tomography requires going around a circle exactly once. It was interesting how much error this small difference in pi caused to the resulting reconstructed image. |
| hamster_nz:
--- Quote from: TimFox on April 13, 2022, 04:14:00 pm --- --- Quote from: adx on April 13, 2022, 03:32:54 pm ---=SIN(3.1415926) 5.35898E-08 --- End quote --- In a computed-tomography application, one of our software engineers used a value of pi defined to 7 decimal places instead of the compiler's function PI(). Unfortunately, he was off in the last decimal place. Computed tomography requires going around a circle exactly once. It was interesting how much error this small difference in pi caused to the resulting reconstructed image. --- End quote --- Me: Goes away and quietly adds the following to the build pipeline: --- Code: ---#!/bin/bash count=`find src -type f -name '*.[ch]' | xargs grep -l -e "3[.]14" -e "1[.]57" | wc -l` if [ "$count" != 0 ] then echo "Found a PI-like constant in these files:" find src -type f -name '*.[ch]' | xargs grep -l -e "3[.]14" -e "1[.]57" exit 3 else exit 0 fi --- End code --- |
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