"radical direction" is correct and usable in written English.
It is a phrase that refers to significant or extreme change, usually regarding policy. For example, "The government has taken a radical direction in its environmental policies."
If Ω is a finite ball or the whole space, then the positive solutions of systems are radically symmetric and decreasing in radical direction by the result of Troy [14].
"That radical direction exists in Tatarstan," Mr. Malashenko said.
But large corporations have changed their look, too, though not in a radical direction.
With this radical direction Ms. Wagner does figuratively defy her father, a bulwark of artistic conservatism.
Patrick has driven his chamber in a far more radical direction.
This is evidence of a new and radical direction for fashion.
Actors pull scenes in radical directions without warning their colleagues.
Then, the motion equations of fluid droplets along axial and radical directions were established.
And if these guys keep going in the radical directions they are going, at the speed they are traveling, they are going to hit something real hard.
The analysis which follows shows that the sensitivity distribution of the effective radial conductivity and the wall heat transfer coefficient in the axial and radical directions of a small experimental bed depends strongly on the actual values of these parameters.
But he was also pushed in several radical directions: from Flynt, toward a leftist critique of institutional art as elitist and imperialist; from Smith, toward an understanding of emerging queer and camp aesthetics; from Cale, toward an immersion in the liberating sound of country music and rock.
