Copyright on Mixamo character use

To whom it may concern,

We are graduate students who are conducting a non-profit academic research on avatar motion generation in VR.

We developed an algorithm to automatically generate a skeleton’s bodily motion, such as walking or punching etc., in the form of a timed sequence of joint coordinates (a few seconds long per motion).

Our intended scope of using Mixamo is for rigging the skeleton of the generated motion, so that we perform user studies to assess the their experiences of our generated motions.

We do not alter the texture of Mixamo characters. We plan to publish our research as an academic paper. (non-commercial, of course)

Would you please advise if the aforementioned scope of how we use Mixamo is a copyright violation?

Thank you very much for your feedback.