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It strikes you when you first touch an iPad. The form just feels good, not too lightweight or heavy, nor too thin or thick. It’s sensual. It’s tactile. And it’s a good way to spot a first-timer, too, as I observed with a few test subjects. The dead giveaway for an iPad n00b is pausing a few breaths before hitting the “on” switch, and just let the thing rest there against skin. Flick the switch and the novelty hits. Just as the iPhone, Palm Pré and Android phones scratched an itch we didn’t know we had, somewhere between cellphone and notebook, the iPad hits a completely new pleasure spot. The display is large enough to make the experience of apps and games on smaller screens stale. Typography is crisp, images gem-like, and the speed brisk thanks to Apple’s A4 chip and solid state storage. As I browse early release iPad apps, web pages, and flip through the iBook store and books, the thought hits that this is a greater leap into a new user experience than the sum of its parts suggests.

Remember The Periodic Table of Elements series of books we featured here at Boing Boing? There’s an iPad version ($13.99 in the app store, screenshots here), and it’s dazzling — it makes science feel like magic in your hands. I called the guy behind The Elements, Theo Gray, and asked him to put into words the UI magic that iPad makes possible for creators of books, games, news, and productivity tools.

“The Elements on iPad is not a game, not an app, not a TV show. It’s a book. But it’s Harry Potter’s book. This is the version you check out from the Hogwarts library. Everything in it is alive in some way.”

Indeed, the elements in this periodic table seem very much alive. The obvious way to examine static objects — say, a lump of gold (number 79) or an ingot of cast antimony (number 51) is to rotate them, to spin the specimen with your fingertips. And that’s exactly what you do here. You can view them in 3D if you wish, with 3D glasses you buy separately online. Tap here, and live data from Wolfram Alpha pops up (the thermodynamic properties of molybednum, perhaps, or the current price of platinum). Some elements are presented with little video clips you can play, too.

When you get a chance, compare it to the tiny screen of an iPhone or Droid, or the less responsive touchscreens of an all-in-one desktop PC such as HP’s TouchSmart: it’s a completely different experience.

“A stereo 3D video of a static object that you can rotate in real time,” Theo says over the phone. “Honestly, I’m not sure where you go from there. Smellovision? Not a whole lot more you can do.”

The Elements presentation for iPad (those spinning samples of elements you twirl with your fingertip) makes use of openGL textures, compressing visual data in a way that can be compressed in the graphics chip, so the data can be read without hogging CPU resources. By making use of hardware native to iPad, you can can “play” a spin forwards and backwards with no hiccups or performance lags — even spin 3, 4, 5, 10 views of an element at a time. This ain’t Flash video over WiFi, folks. You’ll feel sad going back to chokey http embeds.

Each app for iPad can’t be more than 2 gigs in compressed archive form (a limitation imposed by the zip compression standard at work here, not something of Apple’s own design). Data-dense applications like The Elements buck right up against that limit, but future iterations (this and others that go live Saturday were developed with great haste) will likely take advantage of the ability to do background downloading to supplement data.

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