Printing Light

Several years ago I was asked to write a column on printed LEDs. At the time, I couldn't find any good leads and ended up writing about a different topic. Well, perhaps now is the time. Startup Rohinni definitely has the "wow" factor going for it, with its claim to be able to print lighting and apply it to any surface. 

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Zentangle, Part 2

I had to try Zentangle for myself. So I met with a local Certified Zentangle Teacher at a nearby Starbucks.She explained to me how Zentangle is about the process, not the product, and why quality materials matter (more on that later). Then she talked me through the process of making my very first Zentangle. 

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X-rays and Toothpaste

My new dentist is a very smart man. I asked him why his office had not migrated from film to digital X-rays, and I was impressed with the thoroughness of his research on the topic. He seriously considered buying digital equipment when he moved to a new office several years ago, but decided against it for several reasons.

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Fun With Acronyms

In an effort to keep up on news related to the beats I cover, I have several Google Alerts set up. One of them is "CZT," which is shorthand for cadmium zinc telluride (CdZnTe). This material is similar to the semiconductor cadmium telluride (CdTe), which is used in thin film solar cells. CZT is also a semiconductor and it is useful for detecting radioactive materials. This is important for homeland security, in order to screen for overseas shipments that may contain a dirty bomb, and also in medical imaging, to monitor radiation dosage.

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