November 2007
Intermediate to advanced
736 pages
46h 32m
English
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FOCUSING
A thick video disc with a thickness of 1.1 mm rotating in free air at 30 Hz is generally stable but not critically damped. In order to restrict the action of transverse waves in the frequency range 0–15 Hz and also to compensate for the “umbrella” form deflection of the disc under its own weight, a stablisation system has been incorporated. Stabilisation is achieved in the player by means of an air bearing, which is created by the centrifugal action of the rotating disc on the surrounding air.
A plate with a central hole is positioned in the vicinity of the rotating disc's surface. This creates an air bearing having both the desired damping and stiffness characteristic. Disc stabilisation obtained in this way is by no means sufficient ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.