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YEN-JIE LEE: So to make
the demo done coherently

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with your lecture,
a lot of preparation

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is actually needed in advance.

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So first of all,
you need to make

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a list of the demo
which you would like

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to include in your lecture.

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And secondly, you need to work
with our technical instructors

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to set up those demos
so that they work nicely

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during the class.

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Usually, I come to
the class, like,

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half hour to one hour
before the lecture

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to make sure that everything
is working as I expect.

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And also there were a
lot of communication

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between me and my
technical instructors

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to tune the parameters
to what we would

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like to demo during the
class, and to make sure

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that the physical phenomena
can be seen clearly

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from the demo of our choice.

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And finally, you
need to decide when

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do you want to do those demos.

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And what you are going
to get is that, OK,

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omega, omega D
around omega 0, then

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you are going to get
large type amplitude.

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OK?

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So now, what I am going
to do is to continue--

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As I mentioned
before, I usually like

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to include the demo after
the calculation is done.

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Sometimes maybe it's a
good idea to use the demo

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as a teaser for the
calculation and see that, OK,

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we can reproduce this
result by physics intuition

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and mathematical calculation.

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So that's actually the
kind of consideration

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when I choose which kind
of demo to be included

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in the lecture and the kind of
preparation before the class,

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and finally, the
timing, which I decide

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where to insert those
either experiments

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or analytical calculation using
program during my lecture.