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Comment: Re:Cataract will fluoresce green (Score 1) 310

by Jay L (#39040529) Attached to: Followup: Ultraviolet Vision After Cataract Surgery

Thanks; I'll check my vitamins for lutein and zeaxanthin. I'm a vegetarian, but a bad one - I'm really more of a pastafarian - so I probably don't get enough anything from dietary intake! FWIW, the silicone hydrogels allegedly let in far more oxygen than hydrogels, although at the moment all the data I'm finding is a physics model saying that's not true and some very strong marketing from hydrogels claiming it doesn't matter.

Comment: Re:Cataract will fluoresce green (Score 2) 310

by Jay L (#39038955) Attached to: Followup: Ultraviolet Vision After Cataract Surgery

I've been sleeping in my extended wear lenses as well, and I've worried I'm taking a theoretical risk. Were these modern disposable silicone hydrogels, or the older extended-wear kind? As I understand it, cataracts arose as a side effect of microbial keratitis, and the risks of a severe infection are lower with silicone hydrogels (as well as with disposables in general).

What sort of eye nutrition do you recommend?

Comment: Re:And this costs GoDaddy what, $2.95? (Score 1) 190

by Jay L (#39006945) Attached to: Wikipedia Hasn't Forgiven GoDaddy

Network Solutions is, in fact, a horrible registrar for corporate domains. This winter we changed our DNS from NetSol to Amazon Route 53. When NetSol repoints domains, it *immediately* starts serving generic "parking page" A records from the old DNS server. Combine this with the fact that many ISPs ignore the SOA TTL record, and you have a domain that's down for over a day for your customers at BellSouth, Cox, RCN, and probably others. We did get them on the phone, and was told "that's the way it works".

Comment: Re:LOL! (Score 1) 446

by Jay L (#38960065) Attached to: Tapeheads and the Quiet Return of VHS

Why is 44kHz seen as sufficient to capture all that information?, let alone the complexity of a song?

Because you're thinking of the samples as "points along a line, which I can use to approximate the original wave." The power of Nyquist is that it's not an approximation; those points are sufficient to reproduce the EXACT waveform. A better way to think about it is this:

There is only one waveform that goes through exactly those points. Given those points, you know which waveform it was.

Think of a simpler version: Instead of sine waves, use a straight line. All straight lines are of the form y = mx+b. I have two samples: (1,2) and (2,4). I now have all the information in the original line. Not some of it, not an approximation, not an estimate - ALL of it.

Nyquist/Shannon says that if your sample rate is greater than twice the highest frequency, you have ALL of the information.

Prepare for tomorrow -- get ready. -- Edith Keeler, "The City On the Edge of Forever", stardate unknown

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