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Comment Re:Not exactly, but yes (Score 2) 127

You are incorrect. I am posting from a "Verizon" iPhone which I bought, unlocked , from an Apple store, then popped in a T-Mobile SIM. It works fine.* The Verizon iPhone has all CDMA and GSM frequencies for all three networks (AT&T, T-Mobile, Verizon).

I bought the Verizon version so that I could use it in Korea. T-Mobile provides free data there but you have to have a CDMA-capable phone. Also, I was new to T-Mobile and if their coverage sucked I liked the ability to move to either AT&T or Verizon.

* T-Mobile recognizes it as an "unknown smart phone" since it doesn't broadcast the correct model number. I get full LTE speed data, voice, text, with graceful downgrades to 4G, 3G, and E, but I can't use iPhone specific features like visual voice mail.

Comment Re: Correction: T-Mobile Android Smartphones (Score 1) 127

They simply disable CDMA in the AT&T/T-Mobile version. The Verizon version has both CDMA and GSM and frequencies for all three carriers.

- posted from a "Verizon" iPhone I bought new contract-free and only ever used with a T-Mobile SIM .

The Sprint version is significantly different.

Comment Re:Requires a very high speed camera (Score 2, Informative) 142

No, you can pick up something higher than Nyquist, as long as you understand your sources of information and noise. It will alias down into the measurable range, and you can extract useful information from the alias. We have a system that operates up to 1 MHz using a 1.8 MHz ADC. When we know the signal is at 1 MHz, we extract the information at 800 kHz and use that.

What the GGP was talking about, though, was finding resonance on the bag where unique 30-Hz-width bands higher frequencies were being naturally modulated to baseband. If you had 100 points on the bag that each modulated a different frequency (30 Hz, 45 Hz, 90 Hz, ... 1500 Hz), you could extract the data from each sub-band separately and reconstruct the original signal. See http://en.wikipedia.org/wiki/F... and assume the source isn't one 1500 Hz conversation but instead one hundred 15 Hz conversations. And also assume that is one amazing bag of chips.

Comment Re:$7142.85 (Score 3, Insightful) 419

A few laptops gets there.

The scam works better with a large purchase. Banks routinely deny transaction over some amount, forcing the retailer to call for an override code. Apparently the denial for "bad account" look identical to the one for "valid account, but that amount is high so give us a call, okay?"

If his card was denied for a $500 purchase, he'd need to convince the retailer that it was a bug in the system, not just a routine check for a large purchase.

Comment Re:Ban caffeine! (Score 1) 511

I agree with the definition of pot as a gateway drug only because it is mostly harmless but illegal. Anyone taking it is already breaking the law, so why not do so with something else?

Having the law aligned with risk breaks the "gateway" argument; I agree with you that caffeine and alcohol etc. called gateways is ridiculous.

Comment Re:Completly Blindsided. (Score 1) 285

From the article, it sounds like CVUSD isn't an independent organization. The school districts where you live might be structured differently, so this might not be apparent to you.

In Texas, school districts are independent entities (ISDs) with their own taxing authority. The ISD owns the land and runs the schools. Board members are elected.

In Louisiana, where I lived for a while a long time ago, the parishes run the schools. There's a school board, whose members are IIRC appointed by the county commissioners, good ol' boy style. The schools have no tax authority and have to go to the parish for money or infrastructure requests.

It sounds like California organizes school districts more like the latter than the former, though a given county might have multiple districts instead of just one as in Louisiana parishes. The article describes the county limiting bandwidth use by CVUSD, something impossible to happen in Texas as the county has no authority over the ISD.

Likewise, and to your point, the article says that the county encouraged CVUSD to deploy the iPads, and from that CVUSD assumed the county had enough bandwidth to manage this. I guess that means the county is the district's ISP, and the district isn't allowed to change ISPs or contract with a private ISP. And the county IT maybe didn't know the district was going to do this, so they couldn't point it out and try to get a bigger pipe at that level. So they didn't see the problem because bureaucracy.

Comment Re:Expensive? (Score 1) 285

>> Your proposal then requires the school boards to fund such productions for every topic of every grade - in some cases multiple levels of one subject for each grade.

No it doesn't. It requires them (the thousands of them) to fund one topic at one level in one grade, then see what happens after that. Maybe don't start with social studies which might be obsolete in five years, and instead start with fourth grade multiplication which won't change in the next 50. Then go from there at an affordable pace.

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