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Also defines associated feature-test macros to determine whether a particular operation is available on the current target hardware ( either directly or by synthesis ) . Argonne 's technique measures the speed of pulsed ultrasonic waves as they traverse any portion of the granular medium lying directly between two ultrasonic transducers . Cost-sharing contributions are entered directly as revenue in the general budget or in the specific budget or special account in question . Ultimately , the simultaneous photometric and spectroscopic analysis of these systems may be used to directly determine distances to the clusters and to calculate turnoff masses for GC stars . We scrutinize the media for examples of bias , and then inform our subscribers of any offending articles , asking them to complain directly to the news agency concerned .