Monolith149 Daily

Another place to see what KG is doing...

Eclipse Resources

In case you haven’t noticed, some of the best resources for eclipse information are the sites and EartySky, in my opionion.

Complete History of IBM PC

Not eclipse:

The complete history of the IBM PC, part two: The DOS empire strikes | Ars Technica. This is part two but it links to part one.

Ars Technica


We noticed the other day how QAM (quadrature amplitude modulation) bit rates, e.g., in optical fibre, increase by 4x at each step: QAM16, QAM64, QAM256. The Wikipedia page makes why this is completely clear. In the digital version of QAM there’s an NxN matrix, a “constellation” of points when viewed as an amplitude and phase angle. Scroll down to “Quantized QAM” on the page to see the animated GIF on the right.

Quadrature amplitude modulation