ISP Information:
A programming term describing a process that defers its operations as it runs, growing in memory size. Once all operations are deferred, there is a computation process that runs through the operations and figures out the values. If a recursive process is interrupted, there is not any easy way to recover it, as the operation is constructed on the fly with no fixed amount of variables. Contrast this to an iterative process
ISP Glossary:
Recursion - Mark Brader wrote: As for radar, the Germans, the British, the Americans, the French, and the Japanese *all* invented it independently, and all kept it secret from each other until the outbreak of war. The first to complete a working radar system was Rudolf K�hnold (Kuehnold) of Germany, in 1933-34. The Germans were initially interested in naval applications, and they had the first shipboard installation, in 1935.Right, BUT, what the English had was the magnetron. Everybody elsewas limited to very long wavelengths, which made their systemscomparatively less useful. Robert Watson-Watt of Britain invented radar independently in 1935, and was determining the distance to targets months ahead of the Germans. The British government committed to using it for air defense the same year, and by 1937 the British also had airborne radar systems.This was the CHAIN HOME system, which operated on 45 MHz. The Germangear of the same era was also working on similarly long wavelengths. In the US, work on radar began in 1934 but proceeded more slowly and a working system was not developed until 1936. After the war began, British and US researchers worked together to develop better systems than either country had individually; much of this work was in the US, which also contributed the word "radar" in 1940. --The concept of radar is fairly intuitive and it's not surprising thatmany different groups in the thirties came up with it at the sametime. What is amazing is the magnetron tube with the ability togenerate extremely short wavelength signals for high resolutionimages.--scott"C'est un Nagra. C'est suisse, et tres, tres precis."
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