1. Moody's Wattermellon Lecture: Illustrate partial differentiation by dramatically cutting a wattermellon in half, sticking it's sticky wet side to the chalk board, tracing it, and then saying you just proceed to differentiate normally.


2. Moody's use of a tape measure as a physical analogy for a metric.


3. Kuenning's Pointer/Chocolate-Chip Cookie lecture. In which you learn that a pointer to a chocolate-chip cookie is not the same thing as a chocolate-chip cookie, but that if you have a pointer you do know where to find a cookie.

Derived makeOne();
...
{
  Base const& x = makeOne(); // This must be a const reference, not just a reference.
  std::cout << x << '\n'; // This is legal; x still exists(!)
  // The lifetime of the temporary is extended to here.
} // x.~Derived() is called here without virtual-function overhead!

void
f(int& i) {
  ++i;
}

unsigned foo(unsigned x) {
  f(x);
  return x;
} 

After four days, I keep getting the same response on the phone: American knows that my bag is in London, but it is never put on the next flight. Nobody I've talked to seems at all urgent about this. Certainly my luggage from four days ago is at least as high a priority as luggage for someone landing tonight that isn't even checked yet, but in all liklihood American will leave my bag in London while flight after flight flies to Boston. At this point I it has missed seven non-stop flights out of London, and countless routes with connections.

How many days am I expected to wait? What do I have to do to expedite it?

Do I have to call Heathrow myself on my dime?

Do I have to contact the media and tell them American has lost two four-inch knives and a ski mask behind the Heathrow security perimeter?

Can't you just have someone in London go track down my bag in person?

As a young professional working for a Fortune 100, I have many many flights ahead of me; up to now, I felt American was a trustworthy airline. Please restore this faith.

Sincerely,
Ben FrantzDale

1. 16GB at $200 or 32GB at $300?
2. What's the process for transfering a phone number? Does it Just Work or is it one of those pain-in-the-ass media-company interactions?

When Costco discounts televisions during its Christmas shopping promotions, pricing them so low that stores do not make a profit, what happens? There are huge lines at the door at five a.m. When cities provide roads that are priced so low that they lose money on them, what happens? There are huge lines on the highway at five a.m.

f=−Kx

u=½ x^TKx

VDV^T=K

• What's the right way to do it?
• Is there an elegant way to solve this that I'm just missing
• Can you describe this black boxing as finding a total derivative of the system energy with respect to the degrees of freedom you want to prescribe, constrained by minimum system energy?