Tuned vibration neutralisers and absorbers provide an effective method of attenuating tonal vibration within a structure. If the frequency of the tonal vibration alters, then an adaptive tuned vibration neutraliser or absorber can be utilised to track and adapt to changes in the frequency of the source vibration. This paper provides an overview of some of the issues associated with the developm...

We give a bit thread prescription that is equivalent to the quantum extremal surface for holographic entanglement entropy. Our proposal inspired by considerations of threads in doubly models, and equivalence established proving generalisation Riemannian max-flow min-cut theorem. explore our proposal’s properties discuss ways which islands spacetime are emergent phenomena from perspective.

Piping vibration which is mainly caused by the torsional vibration of rotary compressor can be a major noise source of air-conditioner. Especially, the tangential vibration of rotary compressor which is due to the torsional vibration is much higher than the radial vibration or the vertical vibration of compressor. A study as to how the tangential vibration of rotary compressor is related with t...

This invited paper reviews experimental studies of the frequency-dependence of absolute thresholds for the perception of vibration, equivalent comfort contours, temporary changes in sensation caused by vibration, and reductions in finger blood flow caused by hand-transmitted vibration. Absolute thresholds depend on the contact conditions but for a typical hand grip the thresholds show greatest ...

This study investigated the prediction of the discomfort caused by simultaneous noise and vibration from the discomfort caused by noise and the discomfort caused by vibration when they are presented separately. A total of 24 subjects used absolute magnitude estimation to report their discomfort caused by seven levels of noise (70-88 dBA SEL), 7 magnitudes of vibration (0.146-2.318 ms(- 1.75)) a...

In this paper, we describe the influence of vibratory adaptation on vibration perception and its correction method. Vibration strength after change depends on the vibration frequency before change even if the vibration frequency itself does not change. We found that the higher the vibration frequency before change, the weaker the perceived vibration strength. To correct this perception gap, the...