If you bought a WiFi-only Galaxy Tab, you probably assumed you were getting the same seven-inch slate that others have been enjoying since November, just without a 3G radio and burdensome two-year contract. Turns out it's worth poring over those specifications on the rear of the packaging. We've yet to get a confirmation from Samsung, but it appears the company swapped out its Hummingbird processor for an older "1GHz Cortex A8" chip with a slower GPU. The Galaxy Tab carriers have been hawking packs a PowerVR SGX 540, but some folks over at the XDA Developers forums have discovered that its WiFi-only sibling is rolling with the previous-gen SGX530. The specs on the Samsung site also lists Bluetooth 2.1 instead of 3.0 -- yet another significant downgrade. We guess the company had to make some trade offs to hit that $350 price point, but we don't have to like it.
As you may know, crafting a katana is a delicate process that involves carefully constructing a razor-sharp high-carbon edge around a soft shock-absorbent core. One day though, smiths and forging fires could be replaced by electrode-wielding mad-scientists, with the technology to selectively harden and soften metal at will. At least that's what we envisioned when we read about Jörg Weißmüller's breakthrough research in the field of nanomaterials. The German scientist discovered that by placing precious metals in acid he could create tiny ducts through corrosion. Once those channels are flooded with a conductive liquid, electrical currents can be used to harden the material and, if you change your mind about the brittle results, the effect can easily be reversed to make it soft again. The tech could eventually lead to self-healing vehicle armor or scratch-resistant cellphones -- but, really, we just want to zap our way to a high-quality samurai sword. Physorg
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