81.   London officials are now studying ways to privatize some subway operations.

82.   McGreevy is studying ways to use virtual reality in spaceflight, to control robots that might someday explore the surface of Mars.

83.   MSE Technology Applications is studying other ways to treat the water, and to remove copper and other metals in order to help offset treatment costs.

84.   New York-based American Express has been studying ways to use smart cards to reduce fraud and make their cards more attractive.

85.   One approach involves studying the way small molecules called amino acids fold themselves up to make functional proteins.

86.   Opel is studying ways to cut costs and close unneeded factories, Hughes said.

87.   One will study the way certain proteins are processed during weightlessness, in the hopes that researchers will gain a hint about what causes muscle weakening in space.

88.   Onyx is also studying ways to use the virus to carry therapeutic genes to tumor cells.

89.   Political and demographic data on the coders was collected so researchers could study the ways hand-recounters worked.

90.   Possner and researchers at Union College in Schenectady, N.Y., are studying ways to help predict, before the birth, which women might be most at risk.