Sentence examples for a very active problem from inspiring English sources

This remains a very active problem for Mary – not her real name – in part because one of her brother's two abusive teachers, a violent and sadistic man, is still alive.

In terms of the competition, there are many problem-solving websites and competitions (Art of Problem Solving, Project Euler, TopCoder, Kaggle, IXL, Peking online judge and other online judge sites, etc)., but not a lot of very active problem-solving communities.

He says: "The question of how it will change is still a very active research problem, and we don't have clear-cut answers yet.

Model order reduction of parametric problems is a very active research field in systems theory, engineering and applied mathematics.

Image denoising is an inverse problem and is a very active area in the fields of image and signal processing that has been studied for the last three decades.

Recently, sound and efficient algorithms for the solution of these problems were still a very active field of research (see [14 20]).

This problem has been established as a very active research field in computer vision during the last few decades.

The fact that the problem and the solution are in a very active and attractive space — Web 2.0 — added to my interest.

"He will play a very active role".

It was a very active school".

"He's a very active individual.