The existence of a rigid-amorphous fraction (RAF) which constrained long-range motions in the semi-crystalline polymer was demonstrated by DSC trace and considered to interpret the temperature dependence of those free volume properties.
The survival, over the three billion years since they were formed, of these gravity anomalies testifies to the existence of a thick, rigid lunar crust.
The gravity data collected by the spacecraft, combined with topography, confirmed the existence of a thick, rigid crust, giving yet more evidence that the Moon's heat source has expired.
While the sub-glass relaxation was largely unperturbed by the presence of the crystalline phase, both calorimetric and broadband dielectric measurements across the glass transition indicated the existence of a sizeable rigid amorphous phase (RAP) fraction in melt-crystallized PTT owing to the constraining influence of the crystal surfaces over the crystal amorphous interphase region.
Indeed from the standpoint of modern physics the existence of rigid bodies and rigid body motion is not a fundamental self-evident requirement anymore, but only a special property that obtains in a definite limiting case of the physics of classical mechanics and geometry.
Existence of the rigid amorphous phase in the absence of crystallinity was verified in nanocomposite fibers, and two origins for confinement of the rigid amorphous fraction are proposed.
Additionally, the existence of rigid and flexible parts with an ideal length yields a better distinction between rigid and flexible parts of a molecule.
A highly nonlinear relation between the intrarenal pressure and the injected volume was found, which confirms the existence of a mechanical behavior commonly observed in organs confined by a rigid or semi-rigid continent, which we refer to here as the renal compartment.
The possibility of a rigid displacement, and therefore the existence of an inertial frame, can only arise a posteriori, as the result of a peculiar distribution of mass-energy (for example, in a universe empty of mass and energy, or with a highly symmetrical distribution).
This was explained by the existence of a large amount of tightly bound, or rigid-amorphous materials in the solvent-treated sample.
