Hilar bile duct cancer is the most difficult surgery among gastrointestinal cancer, since you have to cut into the porta hepatis area where bile duct, portal vein, hepatic artery are intricately intertwined.

Tonight, I want to have a conversation about this incredible global issue that's at the intersection of land use, food and environment, something we can all relate to, and what I've been calling the other inconvenient truth.

A modern market is more than a website; it's a web of interoperable marketplaces, back office mechanisms, regulatory regimes, settlement mechanisms, liquidity sources and so on.

But non-spiking neurons are actually quite complicated because they can have input synapses and output synapses all interdigitated, and there's no single action potential that drives all the outputs at the same time.

But if I was to say that they're both examples of alternative or new forms of currency in a hyperconnected, data-driven global economy, you'd probably think I was a little bit bonkers.

Again, you can see good decisions can bring quick results, and those two transformations, the economy and the structure and the climate and the low carbon, are intimately intertwined.

So war is an even less efficient way, so I tend to prefer progressive taxation, but of course, history — (Laughter) — history will invent its own best ways, and it will probably involve a combination of all of these.

Even with all those arrows, he thought it failed to really tell you just how iterative, interrelated and, frankly, messy their process was.

Here's why: Einstein's equations of general relativity describe space and time as a kind of inter-connected fabric for the universe.

Those are tightly intertwined with social clusters: meeting rooms, canteens, chat areas -- informal spaces for people to meet and exchange.

And these would all be bad on their own, but these threats magnify each other and compound one another and make each other worse.

It seems to have to do with a complex interaction between genes and environment, but we don't have a diagnostic tool that can accurately predict where or when it will show up.

And to me, this doesn't make any sense because whether we like it or not, the fates of African people are deeply intertwined.

If it's not true -- because it's quite a convoluted mechanism, although it's the simplest we've been able to think of -- then whatever does the job of the Higgs particles we know have to turn up at the LHC.

Eastern Europe, still very heavily committed to natural gas and to coal, and with natural gas that comes from Russia, with all of its entanglements.

And, you know, climate's really complicated, a lot of moving parts in this, but I kind of put it about it's all about the water.

These questions are complicated by a tangled web of characters, forcing Hamlet to negotiate friends, family, court counselors, and love interests– many of whom possess ulterior motives.

Again, whether we're talking health policy, education, environment, energy, litigation, mergers, all of these are complicated problems that are predictable, that this sort of technology can be applied to.

It's called "Enclothed Cognition, " the co-occurrence of two factors: the symbolic meaning of clothing and the physical experience of wearing the clothing, both of which have a direct correlation to how you feel about yourself.

Everybody who's spoken at TED has told us implicitly, or sometimes explicitly, a different story: that life is not linear; it's organic.

And bringing those two together might seem a very daunting task, but what I'm going to try to say is that even in that complexity, there's some simple themes that I think, if we understand, we can really move forward.

When, in contrast, two or more individuals see their choices and their outcomes as intimately connected, then they may amplify one another's success by turning choosing into a collective act.

Reward: this is a more complex and especially integrative form of our brain with various different elements -- the external states, our internal states, how do we feel, and so on are put together.