.
This praise is for all the gals on Websleuths , I like to give credit where due
If not for modern technology , police and society would have a much harder time finding and tracking missing persons like Mrs Krull . Cell phone signals , Closed Circuit Cameras , and Global positioning Satellites are all being used .
Hollywood Actor Ronald Reagan became President of The United States when he was 69 years old and was 77 when his term was finished . He was speaking to a crowd of high school graduates and college students when one of them popped up and said old pharts and old fossils like you do not even use computers or cell phones , so how can you teach us anything.
We old guys invented all that technology .... was Reagan's brilliant reply
Hollywood Actress Hedy Lamarr joined the war effort in the 1940's and used her celebrity status to sell war bonds , but when German Torpedos started sinking passenger ships she said .... "I've got to invent something that will put a stop to that".
And she did , Hedy invented the Frequency Hopping Spread Spectrum method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. It is used as a multiple access method in the frequency-hopping code division multiple access (FH-CDMA) scheme.
FHSS is a wireless technology that spreads its signal over rapidly changing frequencies. Each available frequency band is subdivided into sub-frequencies. Signals rapidly hop among these in a pre-determined order. Interference at a specific frequency will only affect the signal during that short interval.
In other words , to this day , all cell phone wireless technology is still based on her invention , Thank you Hedy and all gals everywhere , that is how we know whether Mrs Krull's phone was at home , or on a Toboggan hill in Winnipeg , or in Paris France.
