Dr Hwang,

I'm very thankful you have made all these simulations. As a secondary school physics teacher, i find the apps very useful for both demos and exam setting.

On another thing, the Creative Commons license basically says I can share these apps, as long as you are acknowledged. I would like to post your apps into my website, as to help make it more interactive for the students I teach. Your approval would be very much appreciated.

Thank you very much!