Err, you don't touch the neutral with 240Volt (this is assuming US wiring) either. 120V, 240V, and 3-Phase 208V systems have 1, 2, or 3 hot wires. All of the hot's have a 120VAC potential relative to neutral/ground. For a 240V setup, it's two hots that are 180 degrees out of phase with each other. 208 volts is 3 hots which are 120 degrees out of phase. If you build a 240 volt device that uses two 20 amps at 120V circuits and sends back through neutral, the neutral will carry between 0 and 20 amps depending on how balanced your load is between the two phases, which is why you need a neutral that is sized to carry the same maximum load as the hots.

How, exactly, is a dumb charger supposed to tell the iPhone that it can supply *more* than 500mA if not for the voltage dividers? And yes, it won't fry the port if it draws too much, but if the port shuts down power due to overcurrent, it won't charge either. I'm somewhat dubious, too, about a $5 wall wart from Fry's having overcurrent protection. I'm not sure what the iDevices do if you plug them into a real USB host interface that can actually talk. My guess is that they will honor whatever power spec the port claims (my Dell Mini 9 Hackintosh seems to only supply 300mA if you're on battery).

But for dumb chargers, it looks for the resistors. If it doesn't see the "Apple resistor values", it charges at the spec'd 500mA. If it does see the Apple special, it charges at more current. Apparently, if it sees *no* resistors, it doesn't charge at all. But why should Apple support an out of spec USB charger? 2 15k resistors aren't exactly going to cost you much money.

And by the way, my iPhone is currently charging on a $5 thing I got at Fry's the last time I was in CA. It most decidedly isn't certified by Apple so I don't know where you're getting your statement about having to buy an Apple approved charger.

That's not quite true. The iPhone is capable of drawing more power than the USB spec allows to charge (USB allows 500mA at 5V, the iPhone can draw up to 1A, IIRC). However, so as not to fry a USB port that is not rated to drive the phone, it looks for the voltage divider resistors. The charger you made should have had 15k pull-down resistors on D+ and D- in it to be a compliant USB host interface. I suspect few, if any, devices check for it, but the charger you made does not meet the USB spec. Any charger that meets the spec will work fine with iPhone, it just will charge at 500mA max, but it *will* charge. Check out the "Minty Boost" schematic here.

I don't think Apple actually documents what you have to do to get it to charge at full power, which is kinda cheesy, but it's well documented by people who've reverse engineered it.

Also, none of this is related to the actual article. The firmware in the battery is well beyond the point where the stuff you're talking about is checked. It's there to keep the battery from catching fire. All Lithium-Ion batteries have it. I strongly suspect that this bug is not unique to Apple.

Light Peak is 4 lanes of PCI Express Gen 2 (or, at least, that's what Intel demo'd at IDF 2009) *or* Display Port. So, fundamentally, it should be able to do pretty much anything out the other end that you can run across PCIe, which includes SATA and USB, etc.

While I couldn't really say for sure from the picture, other people are saying copper-only for Thunderbolt, which, if true, is a major disappointment.

That's nice. Go talk to the people who actually work for one of those companies and complain to them. Until then, it's a product name and it's going to keep getting spelled the way the manufacturer spells it...

No, but it would affect the ability of someone to trademark the name, and since Lustre has always been the project of a commercial company (originally Cluster File Systems, then Sun, then Oracle, and now OpenSFS and this company), that is something that would be considered...

It certainly *can* be used with commodity hardware, but the majority (or maybe all?) of Lustre installations are in high performance computing with thousands, or tens of thousands, of clients (usually the nodes of a supercomputer) accessing the shared file system.

Where more commodity hardware can come in is the installation of the filesystem servers themselves. A system's Object Storage Targets and Metadata Servers (pieces of Lustre) can be external to the Cray and connected via some interconnect such as Infiniband. It should be noted that even the "commodity" hardware for the filesystem isn't exactly cheap if you want a huge capacity and high reliability...

Obviously, we have internal benchmarks that tend to show that Lustre is good but I can't talk about specifics on those. What I can do, though, is link to this: http://www.cs.rpi.edu/~chrisc/COURSES/PARALLEL/SPRING-2009/papers/MADbench2-2009.pdf

The stuff that I found most interesting is on page 12. The machines named Jaguar and Franklin are Cray's running Lustre. Bassi and Jacquard are both running GPFS. On page 15 they claim that they can make up for the deficiency in Lustre's default settings for shared access to a single file by tuning it.

Unsurprisingly, the type of operation you're doing ends up determining which filesystem is best for your application.

In terms of scalability, from the Wikipedia page for the Jaguar system at Oak Ridge National Labs (a large Cray XT5), their Lustre filesystem is 10 petabytes with read/write performance of approximately 240GB/sec (not sure what benchmark was used to get that number).

You need the same background context of Christmas Carol that you need in Star Trek. However, I think it's fairly hard to grow up in the United States and not have seen the story of Christmas Carol at some point.

A show doesn't have to be poorly written to require context. August Wilson's plays are phenomenal, but if you don't have any context in the history of racism in the US, they won't make anywhere near as much sense.

So, having now seen the show upwards of 30 times (as the sound and sometimes light designer over 4 years), I think the show would be extremely hard to understand if you literally knew *none* of the Star Trek references. For instance, all the talk of "honor" and "warriors" only makes sense because most people probably know that about Klingons, whether or not they've seen Star Trek. Obviously, you can *follow* the plot by reading the subtitles but actually understanding why anything is happening requires more context.

This is, in fact, what the show is. A direct translation wouldn't work. Here's the official description of the show from our website:
"Scrooge has no honor, nor any courage. Can three ghosts help him to become the true warrior he ought to be in time to save Tiny Tim from a horrible fate? Performed in the Original Klingon with English Supertitles, and narrative analysis from The Vulcan Institute of Cultural Anthropology.

The Dickens classic tale of ghosts and redemption adapted to reflect the Warrior Code of Honor and then translated into tlhIngan Hol (That's the Klingon Language)."

-- Forest (Sound Design/KCC Twin Cities for 3 of the years the show has run and light design the other year)

We will be back in both the Minneapolis/St. Paul and Chicago areas next year! (I've sound designed the show 3 years in the Twin Cities and light designed it two years [yes, it's only run 4 years, but I did both one year] :)

Hrm. Looks like they changed things slightly. I'd now have to certify that I'm using all available spectrum between channels 7 and 51 before I get to register in the database. Which may mean that I get to purchase a whole new set of wireless mics if I don't happen to be able to tune to the right channels. Lovely.

In any case, I couldn't care less if the government is tracking me (not that they could) via this database (I'm not the original poster).

A summary as it relates to wireless mics is here: http://www.televisionbroadcast.com/article/106892

The idea is that if I'm doing a show, I'll go to the database and register the location and frequencies I'm using, and the dates I'll be using them. They also set aside two TV channels in every area to be used by wireless mics (and other similar devices). That'll be great if a) I can fit into two TV channels (which is likely) and b) my mics actually hit the right frequencies (unlikely). If I need more spectrum or I'm not on the right channels, then I've gotta register.

You know, that's kinda what I thought would happen but.... I've done "The Klingon Christmas Carol" (http://cbtheatre.org/Klingon-Xmas-Carol.html) as a sound/light designer for 3 years (and I'm about to do a 4th) and we've basically sold out every year. Plus, we got a gig for Paramount doing a few excerpts from Klingon Hamlet that are on the Star Trek VI BluRay.