Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×

Comment Re:The whine of the flyback transformer (Score 1) 790

CRTs run up against fundamental laws of physics. One is focusing, bright screens require a lot of electrons per unit time and electrons repel each other. Getting them into a small place (sharp focus) is difficult at best. Another is atmospheric pressure, at 1 ton per square foot big screens need thick glass if they're curved and VERY thick glass if they're flat.

With CRT phosphors, there's always some compromise between ghosting and flicker, and one can't be completely eliminated without worsening the other. There's some possible improvement available with high refresh rates, but before long a high refresh rate multiplied by the number of pixels on the screen results in an unacceptable rate for modulating an electron stream. (This can be reduced with multiple electron guns, but that introduces alignment problems and huge costs.)

All in all, something like a 40" 4k CRT would be enormously expensive, heavy, and a maintenance nightmare.

Comment Re:Related - the clack of wheels on the tracks (Score 1) 790

Interesting. Rails are heavy, and the pressures involved in lifting up a rail due to thermal expansion would cause elastic deformation. If the rail were constrained to not move horizontally, a pressure of about 500 psi would correspond to 1 inch per mile. Not only is that not enough to lift rail weighing 30 lb/ft (about 8.5 sq. in. cross section), it wouldn't support the rail if it were first lifted and then relied upon pressure to keep it up.

Comment Re: $1 million? (Score 1) 273

Why, in any discussion of life extension, must someone mention this foolish idea that extending the decrepit years will be the result? Death is not far away when the repair mechanisms have already failed, and that's when the obvious symptoms of aging are apparent. Useful life extension comes from keeping the body healthy and strong for a long time.

Comment Re:It's never been a "real" dictionary (Score 1) 174

It's common practice to provide drawings for many of the more basic nouns, and acorn is a prime example.

To establish a language in a logical manner, something has to be tied to reality. An effort to make a language out of words solely defined by other words is circular, baseless, and futile. Some things must be identified by pointing (illustration) and acorn is a good place for a root.

Comment Re:Age group? (Score 1) 174

Essential qualities in a definition are identifying the category to which the word belongs, and the distinguishing characteristic(s) that separate the word from other words in the category. In most contexts, a minnow is a "small fish".

You might not even notice if you ate a single minnow. Scoop 'em up and fry them in hot oil by the bucketful.

Slashdot Top Deals

One man's constant is another man's variable. -- A.J. Perlis

Working...