The phrase "active axis" is correct and usable in written English.
It can be used in contexts related to geometry, physics, or any field that involves movement or orientation along a specific line or direction.
Example: "In this experiment, we will measure the forces acting along the active axis of the pendulum."
Alternatives: "dynamic axis" or "operational axis".
This paper presents the design, modeling and testing of an active single axis solar tracker.
Analytical, experimental, and numerical investigations yielding insight into the bio-inspired design elements that could be employed to advantage in an engineered flapping-wing MAV are documented; and it is shown that a four-wing device with a relatively simple wing design and a single active flapping axis for each wing could form the basis of a viable flapping-wing MAV.
These data may explain the paradox in RA of having an excessively active Th17/IL-17A Th17/IL-17Asimultaxisus susceptibility to infections.
In young infants and adolescents, 3 days of hCG stimulation may be sufficient, 38 and in the very young infant with an intrinsically active gonadal axis, an hCG stimulation test may not be necessary if serial blood samples show raised serum testosterone concentrations.
The mean number of tasks completed per day (y-axis) is plotted against the number of days, the players were active (x-axis) for groups of players in similar score groups (color coded based on their scores); contribution decreases over time for all groups.
A design, modeling and testing of an active single-axis solar tracker are presented.
The panels depict glucose migration Cartesian distances (given in Å) from the Tyr292/298 homologous residue (x-axis) and the active site (y-axis) for XylE, GLUT1, SGTP1, SGTP2, SGTP3 and SGTP4.
Chin et al. (2011) have done a design, modeling, and testing of standalone single axis active solar tracker using MATLAB/Simulink.
An intact and active IGF-I axis is necessary for both the development and propagation of mesothelioma cells.
The existence of a cross-talk between fat and the skeleton suggests a homoeostatic feedback system in which adipokines and bone-derived molecules form part of an active bone-adipose axis.
