A boat can «mow the lawn»
over a large area in a relatively short
period of time, while stationary recorders on the seafloor have great temporal coverage, but they record only within a
certain range
of the hydrophone,» said Selene Fregosi, a researcher at the Cooperative Institute for Marine Resources Studies, Oregon
State University and National Oceanic and Atmospheric Administration in Newport, Oregon.
For example, the S&P 500 Index is one
of the most widely traded index futures contracts in the United
States; stock portfolio managers who want to hedge risk
over a
certain period of time often use S&P 500 futures.
A mortgage note is a written promise by a borrower to pay a
certain sum
of money to a specific lender
over a
stated period of time at an agreed upon interest rate.