Android Emulator is not running

I tried to download and play around with Android SDK. So I followed the steps given in this link. It worked fine, then I tried to do the Hello World tutorial. However, when I clicked run->run, nothing happens.

It turns out that the emulator is not running. When I tried to run the emulator from Eclipse, by clicking Window->Android SDK and AVD manager, and create a new virtual device, and click “start”, it gives an error that says: emulator: ERROR: unknown virtual device name:’my_avd’

After I google the internet, I found out that the solution is to set the path to the Android SDK home. The reason is that sometimes the emulator is looking for a profile directory at a different location. So I set my environment variable ANDROID_SDK_HOME to the .android folder in my drive. And it all sets. The solution is given also in this link.

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Bring Science Home

Scientific American is feature some home science activities. I want to try it!

http://www.scientificamerican.com/section.cfm?id=bring-science-home