ROAMING THE OCEANS

The Wi-Fi Roaming Game

We propose an extensive-form game as a model for pricing roaming charges in 802.11 wireless data networks. We specify utility functions for the three agents involved in the game: the wireless user and the visited and home operators. With realistic assumptions, we use the model to find optimal roaming prices for delay insensitive users.

National Roaming

National roaming is a form of infrastructure sharing in mobile communication networks, where an operator opens his network for a competitor’s customers and is compensated by a usage based charge. Arguments in favour of national roaming include the reduction of network investments or faster network rollout. This paper examines the effects of national roaming on competition, network investments a...

The changing oceans.

THE EVOLVING DISASTER OF THE GULF OF MEXICO OIL SPILL REMINDS US THAT OUR WELFARE depends on a healthy marine ecosystem and that the oceans are vulnerable to human activities. The oceans sustain a vast wealth of biological diversity, deliver critical ecosystem services, supply valuable natural resources, and are a central component of the climate system. It is therefore critical that the curren...

Origin of the Oceans

Illustrating the oceans.

Mark Schrope Science Writer Growing up on the tropical island of Jamaica, it’s not surprising that Guy Harvey developed a love for the sea and fishes early on or that he would choose a career based on their study. However, his passions led him down a decidedly unorthodox path for a fisheries biologist. Harvey built a marine art empire that has put shirts depicting marlins, sharks, and other ope...