On the other hand, vibration absorbers are an open-loop method that have long been used to decrease vibration from external sources, particularly sinusoidal disturbances.
Friction dampers are commonly used in jet and turboprop engines to decrease vibration stresses of turbine blades by means of irreversible conversion of mechanical energy into heat.
By matching the holder natural frequency to the clamped free boring bar natural frequency, a new dynamic system is obtained with decreased vibration magnitude and reduced susceptibility to chatter.
The rationale for such study is the fact that as the addition of viscoelastic materials provide decreased vibration amplitudes, it becomes important to quantify the increase of reliability that can be obtained.
Pure forms are characterized by pyramidal signs, associated with muscle weakness and bladder dysfunction, but patients may also have decreased vibration sense at ankles or pes cavus.
Effects of organophosphate poisoning may persist long after the acute response is resolved; sequelae include increased neurologic symptoms, deficits in neurobehavioral performance, decreased vibration sensitivity, and impaired nerve conduction (Kamel and Hoppin 2004).
Diabetic neuropathy was diagnosed by the presence of two or more components among clinical symptoms (bilateral spontaneous pain, hypoaesthesia, or paraesthesia of the legs), the absence of ankle tendon reflexes and decreased vibration sensations using a C128 tuning fork.
Exclusion criteria were 1) heredity of neurological disease, 2) presence of neurologic or metabolic disease, 3) treatment with medicine known to influence nerve function, or 4) signs of peripheral neuropathy, such as lack of tendon reflexes or decreased vibration sense.
82 The clinical spectrum of cisplatin-induced peripheral neuropathy is comprised of sensory symptoms in a stocking-and-glove distribution, decreased vibration, and proprioception and suppression or loss of DTRs.
