This is very much an active field of research, and these conclusions may evolve rapidly.
This is to be expected as process calculi are an active field of study.
It has become an active field of research following work by Starobinsky.
These effects are still an active field of study.
Pattern recognition is a very active field of research intimately bound to machine learning.
Graph coloring is still a very active field of research.
He has been in active field of creative writing since more than 45 years.
Real options are today an active field of academic research.
With these elements he created an active environmental field that could, apparently, be infinitely extended.
Concurrency theory has been an active field of research in theoretical computer science.