PCA is an axis rotation that aligns a new set of axes, called principal components (PCs) with the maximal directions of variance within a dataset.
In the other direction, any maximal directed pseudoforest determines a function ƒ such that ƒ(x) is the target of the edge that goes out from x, and any non-maximal directed pseudoforest can be made maximal by adding self-loops and then converted into a function in the same way.
Before solving the position and orientation, the magnetic field could be rotated in two orthogonal planes to find the maximal pointing direction.
(D ) Microtubule (YFP-MBD) orientations correlate with the maximal stress direction predicted in the mechanical model.
Note that tensile stress at the meristem boundary becomes anisotropic before tissue folds, as maximal stress direction is first prescribed by differential growth.
2. if a murmur was detected, description of its timing (systolic/diastolic), maximal point, direction of the sound radiation, and grade and quality of the sound.
This is predicted to increase tension in the epidermis, and in the most extreme cases, to induce a bias in maximal stress direction parallel to the blades.
In particular, microtubules tend to be perpendicular to the maximal strain direction in cells (e.g., in the peripheral zone of the meristem), whereas they are parallel to maximal strain in the boundary regions between shoot apical meristem and floral meristems, a region which is also under highly anisotropic tensile stress parallel to the microtubules (Burian et al. 2013, Bozorg et al. 2014).
Two main rules for orienting MTs in plants have been proposed; perpendicular to maximal strain directions, and parallel to maximal stress directions [4], [16].
Our physical model suggests that maximal stress directions become circumferential to the laceration after treatment and independent of cell geometry.
