"He laughed and said, 'You don't even want to know what I'm going to do to you.' " Egan's interactions with the North Koreans in New York sometimes took the form of trout-fishing expeditions and pheasant-hunting trips in New Jersey.
These results suggest that interaction at either the north or south interface is sufficient for heterodimer formation in vivo.
On all fronts, the North is scaling back its interaction with the rest of the world and offering nothing but clenched fists.
Mexico is situated on the western, or leading, edge of the huge North American Plate, whose interaction with the Pacific, Cocos, and Caribbean plates has given rise to numerous and severe earthquakes as well as the earth-building processes that produce southern Mexico's rugged landscape.
The interaction effect between year and region of residence shows a further disadvantage of the South in comparison with the North only before the crisis (2005 2008), while it becomes no longer significant in the following years.
Some go even further and suggest that tourism has a potentially subversive effect – that interaction with foreigners shows North Korean citizens just how far behind they are from the developed world, subsequently influencing them to question their government's intentions more.
It even spread to the north African countries, which had never had any sectarian interaction with the Islamic Republic.
The contrast with the North is stark.
Crucially, dimerization arises from two potentially independent interactions surfaces at the "north" and "south" poles of the torus.
