I am trying to repair some Television sets that I have been collecting.
Classic CRT televisions. I did that 35 years ago, when the tubes were in. For the TV hobbyists: is it possible that when this medium power high voltage transistor shorts between emitter and collector, nothing else is af

First, let’s start with an easy case. To the left is a PCA plot with four populations. Nigerians, East Asians (Chinese + Japanese), Europeans (whites from Utah), and finally, African Americans. The x-axis is the first principal component of variation, and the y-axis the second. That means that the x-axis is the independent dimension of variation within the patterns of genetic data which explains the largest fraction of the total amount of genetic variation. The sum totality of the variation can be decomposed into an large set of independent dimensions which can be rank ordered from the largest explanatory components to the smaller ones, successively by number. In a human genetic context the first principal component invariably separates Africans from non-Africans, and the second principal component often maps onto a west-east axis from Europe to the New World. Subsequent principal components can often be useful in smoking out fine scale distinctions, or relationships which are confused by the existence of 













