SACH-SAWCH

Thousands of graphs; each with thousands of 3D data samples and we were now out of disc space and so out of business. Yaaaaahhhhhh!!!!! Unless... Unless, we dissect that data to see how it might compress. We chose Fourier discrete methods. Not a single case in all that data needed more than 6 “harmonics” (pairs of numbers, turning circle side & speed – same as gears). Result: Exact matches. Graphs on transparent paper held to the light were the same (Thanks Jack Jolly, Rutgers engineering who generated stacks of comparisons). But (thankfully) only six harmonics (12 numbers) per case? Cases with a wide range of abnormalities? Think this way. What we do well, we do with the anatomy that we have. But, abnormality cannot do anything you can dream up. Abnormality is also constrained by our anatomy. A knee can't be anywhere. It is tethered by the hip. It reacts to the same ground. This meant that WE are bearers or users of maybe 6 functionally linked gears! We identified five consistent anatomic but abnormal often conjured another. We solve our needs with them or we fail with them as well. So humans have 5 to 6 built-in gears (or wheels)? Or five plus a spare? Was there an ability to combine the built-in gears to generate a different required 6th gear? Yes. What is a harmonic, again? It is a number pair. The first number is the gear size (amplitude or in electronics = power = circle radius ) and the second number of the harmonic is theangular velocity at which that gear is turning at that functional moment in time. A full gait cycle might be from right heel strike to the next right heel strike. If continuous walking is being followed then each full cycle repeats making this a periodic process, like what a wooden horse on a merry-go-round is doing, same thing over and over.