"It may be from the Metro-North trunningunderg under Park Avenue which transmit substantial ground vibrations to the building, or it may be caused by water freezing and thawing behind the limestones," he said in an e-mail message.
The results of this study confirm that many of the handheld adapters can produce substantial overestimations of vibration exposure, and measurement errors can significantly vary with tool, adapter model, mounting position, mounting orientation, and subject.
Usually, it is considered as an undesirable effect for civil or marine structures but here we will show that if the vibration is substantial, it can be used to extract useful energy from the surrounding flow.
If the dampers in the vertical and horizontal direction are close to the optimal value of the corresponding taut cable case, substantial reduction of the vibration level of the whirling mode as well as the frequency interval of its occurrence is attained.
This is because the extreme vibration creates a substantial amount of energy and motion, powering mouth fluids (saliva, water, toothpaste) into the areas between teeth and below the gum line.
FT IR spectra of the PEO-g-MWNTs shows a substantial shift in CH stretching vibrations indicating a plausible weak intermolecular interaction with π electrons of the MWNTs.
The FT-IR spectrum suggests that the [Re(bpy)(CO 3(L)] (L=labile ligand) symmetry is retained and vibrations display a substantial low frequency shift with respect to fresh RePpic TiO2, indicating that the Re centre has changed from cationic to neutral.
Vibration signals measured from a gearbox are complex multi-component signals, generated by tooth meshing, gear shaft rotation, gearbox resonance vibration signatures and a substantial amount of noise.
The DVA is likewise designed but with the intention of inducing substantial inertial influence upon a host structure for vibration control purposes, either to globally dampen the vibration of the main body or, in an undamped configuration to "absorb" the primary system vibration at a single frequency.
