Question for Caelin Gabriel on digital cables

[CGabriel]

Originally Posted by Puma Cat

LOL..



Yup. And, I should add that this is all an experiment...'cause that's what scientists do!

If I had a metrology system in place to measure S/N, the noise floor, and/or any distortion or noise components, I would be doing a full-on DOE using the JMP 14 Custom Designer. Most likely, four factors at 2 levels with quadratic terms in the model to examine curvature of the response surface(s).

Yes, we are obsessive types who want to know the what, when, where and why of everything. Sure there is the “common knowledge” and accepted normal practices. But through experimentation we often find that the accepted common knowledge is often incorrect or misleading or inappropriately applied.

[Puma Cat]

Originally Posted by CGabriel

Yes, we are obsessive types who want to know the what, when, where and why of everything. Sure there is the “common knowledge” and accepted normal practices. But through experimentation we often find that the accepted common knowledge is often incorrect or misleading or inappropriately applied.

Truer words were never spoken.

I remember working with some of the scientists from Hayward, CA who invented quantum dots; they were working up at Molecular Probes in Eugene, and trying to figure out how to make Q-dots with maximal synthesis yield. It was challenging, because its complex nanocrystal inorganic chemistry. I taught one of the guys DOE, and when he was characterizing one of the key reagents used in the synthesis, he found through DOE that the optimal concentration (referred to as the level in DOE) of this reagent was at the completely "opposite" end of the range. In other words, the DOE told them to use either the low or high level for maximal yield and they had using the opposing level for years and years! Which is why their yields were so bad!

When I asked them why they had been using completely the wrong amount of this reagent, he said, "Because thats what we had always done! Someone way back when said that was the right amount, and we never questioned it."