Learning process "TED"

The midterm exam is near at hand.
I have 4 exams next week.
So i didn't spend much time listening to Arirang Radio.
I focused on preparing for midterm exams.

I downloaded "TED" on my smart phone.
I like "TED" app. It encourages me.
They provide us much amazing stuffs and I can even downlaod it.
That means i can watch the video clip again and again.
It is very useful. I can learn many different topics and many different people.
I already watched some video. It changed my perception of our society.
I'm not sure but we can see subtitles for some videos.

I just watched the video clip about Smart city.
I watched the video just because the speaker was korean.
Prof. You young jin.  I've never heard his name but
I like his presentation. He talked about platform which means basic step for smart city.
I don't have any background information about Smart business or technological knowledge.
So it was hard to understand what he was saying.
He said our city will become as a huge flatform in 10years. Our city will become one of the biggest Base Sation or Electric system. Anyways, I like TED app as well as Arirang Radio.
I will keep watching and using TED app.