11.   Because of the difficulty and complexity of atmospheric science, Serafin said, many researchers emphasize the use of computer models and theoretical work.

12.   For fires, though, the theoretical work has produced a piece of practical advice.

13.   One problem is that theoretical work on the natural rate is too often divorced from gathering concrete evidence in the field, some economists argue.

14.   Piccioni gained renown for important theoretical work and for an experiment he conducted in the basement of a Rome high school during World War II.

15.   The theoretical work of Portelli and other Italian oral historians has become standard reading in the field.

16.   This may take years of further observations, data analysis and theoretical work, Herbst said.

17.   And two researchers were named co-winners of the chemistry prize for theoretical work on the quantum properties of molecules.

18.   It is the second year in a row that the prize has gone to work with a clear connection to day-to-day lives, rather than to highly theoretical work.

19.   The award caught the attention of many because it recognized work with clear practical applications, rather than the highly theoretical work that usually gets the prize.

20.   The three professors won the prize for their theoretical work.