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Comment ultra low latency over microwave and laser link (Score 2) 137

not fiber. point to point laser and microwave links.

I believe you are referring to ultra-low-latency trading.

They prefer microwave links to fiber because the microwave signals propagate faster through air than light does through a glass fiber. Light travels through glass fiber at about 65% of c, which is also pretty comparable to the velocity of a electric signal in a transmission line (.65 to .75 c) (which is where Admiral Hopper ties in)

Microwave signals propagate though air at damned close to the speed of light, and the microwave signal paths are direct by necessity. That means the path can be significantly less than half the distance a cable (electric or optic) and the speed about 50% faster.

Optical paths are also used, they are by laser through the air. This has the same direct path, near c speed advantages as microwave.

Comment Re:Hmm (Score 2) 533

systemd is best avoided. Avoid! Avoid! Avoid!

(pulseaudio, avahi, systemd. Why are these things all such a f*cking bear to deal with? Why, oh why?)

CentOS might work for you, if you don't feel the need to be completely modern. No systemd in Centos 6. I expect to see in in RHEL 7 / CentOS 7, though.

Comment use hearing protection now (Score 4, Informative) 34

This is an article about "hearing loss." Much hearing loss is preventable.

Use hearing protection now.

Use hearing protection when running your leaf blower, weed whacker, power sander, lawn mower, and especially when making like a war-mongering imperialist at the shooting range. Use hi-fi hearing protection at rock concerts and loud clubs.

Once your hearing is damaged, it is not recoverable, unless you become The Bionic Woman -- and for about 50% of us, that is pretty much completely impossible.

Hearing protection is cheap. I like the Etymotic ER20 for rock concerts. Maybe I look silly wearing them. But... I can still hear after the show. I really don't care if people think I look silly. I've been to some literally deafening rock concerts, and my ears have suffered for it... Now I always bring (and wear!) my ear plugs to shows, And I use hearing protection when running noisy power equipment.

Comment Re:MacBook Air 13 Inch (Score 1) 702

The 12" Powerbook G4 was the end of my love affair with Apple. Every time I got an MBP, the dang thing would have some mechanical issue (catch fire, lose DVD inside, you name it). That G4 laptop though, it's still going strong with one simple keyboard replacement.

My wife wrote 5 books on the dang thing, too!

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