11.   Difficult, that is, using known mathematical techniques.

12.   His most important innovation is a mathematical technique that he calls video orbits.

13.   Now he is using mathematical techniques to analyze the process of making oboe reeds.

14.   On behalf of the Defense Department, he applies mathematical techniques called optimization theory and regression analysis to weapons systems to find ways to improve the accuracy of missiles.

15.   Specifically, programmers have developed algorithms, mathematical techniques encoded in software, that scan NEXRAD screens.

16.   Spall uses mathematical techniques called optimization theory and regression analysis to find ways to improve the accuracy of missiles.

17.   Huffman developed the Huffman Coding Procedure, a mathematical technique still vital to data storage and transmission.

18.   Though others have used the mathematical decoding technique to study the nervous system, the team was the first to provide such a detailed view, Ms. Dan said.