principal axes


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principal axes

the axes of a body or object around which the moment of inertia (resistance to rotation) is greatest, least and intermediate. With reference to the human body in the standing position, the axis for maximum moment of inertia is the sagittal axis (front to back), for minimum is the vertical axis and intermediate is the frontal ( syn transverse ) axis (side to side), all axes passing through the midpoint of the body (where the frontal, sagittal and transverse planes intersect).
References in periodicals archive ?
The principal axes don't just graze the binding site; again and again I'd find that at least one would run right through the part of the protein that was most important for binding to a variety of ligands, from DNA to vitamins," says Foote, also an affiliate assistant professor of immunology at the University of Washington School of Medicine.
For example, when calculating the principal axes of inertia of p53, a tumor-suppressor gene, an axis was found to intersect amino acid 248, the site of the most common genetic mutation in human cancer.
For this polyirnide film, the two principal axes coincide with the machine and transverse directions.
12], is obtained by measuring the Young's modulus at some angle, [theta], to the principal axes in the plane of the film.
Version 8 is the first program that can calculate fatigue life from principal stresses rather than from individual components by resolving them into principal axes from a frequency response analysis.
In this plane, wave front and energy flux coincide however for propagation along principal axes 1 and 3.
One can observe a large effect, except for the principal axes 1 and 3 corresponding to [[Theta].