The ability to quantify the sensation of vibration is a valuable indicator of the state of tactile sensory system. Elevated threshold in the detection of vibratory stimuli may be the first sign of neuropathological disorders. Mechanoreceptive units are responsible for vibrotactile sensation of the skin, and different types of these units respond to different frequencies. Vibrometry is based on ...

Interest in sensitivity to vibration as an aid to neurological diagnosis began in 1889 when Rumpf tested this function in a case of syringomyelia (Fox and Klemperer, 1942). Subsequent investigators found altered vibratory sensitivity in various disorders of the nervous system (e.g., Williamson, 1922). Reduced sensitivity, for example, has been reported in peripheral neuritis, diabetes mellitus,...

This paper introduces the basics of energy harvesters and demonstrates two specific vibratory-type energy harvesters developed at the University of Hyogo. The fabrication and evaluation results of the vibratory-type energy harvesters, which employ electrostatic and electromagnetic mechanisms, are described. The aim of developing these devices is to realize a power source for an autonomous human...

Males of the North American cicada Okanagana rimosa (Homoptera: Cicadidae, Tibicininae) emit loud airborne acoustic signals for intraspecific communication. Specialised vibratory signals could not be detected; however, the airborne signal induced substrate vibrations. Both auditory and vibratory spectra peak in the range from 7-10 kHz. Thus, the vibrations show similar frequency components to t...

This paper consolidated the improvements in mechanical properties from the past literature available using Vibratory welding technique. Vibratory welding is a promising method in eliminating the disadvantages experienced by the traditional welding like residual stress due to the electrical energy input which induces vibrations by varying the input parameters voltage, current, amplitude and freq...

This paper reports a non-contact experimental characterization of resonant modes in micromachined spherical shells fabricated by pressure and surface tension driven plastic deformation (glassblowing). For a glass-blown shell with 0.9 mm diameter and 10 μm average thickness, dynamically balanced 4and 6-node vibratory modes were identified at 1.27 MHz and 1.44 MHz, respectively. Without any trimm...

Vibratory feeders are commonly used in industries for part feeding. There are several factors that affect the conveying velocity of parts on the vibratory feeder. Among these, the critical factors such as excitation frequency, amplitude of vibration, mass of part, co-efficient of friction and Length-towidth (L/W) ratio of the part were considered for experimental studies. The percentage of infl...

BACKGROUND Vibratory stimulation is a potential method for the treatment of pain. METHODS The effect of vibration on the forearm on detection (DT) and pain thresholds (PT) induced by electro-cutaneous stimulation were investigated in healthy male and female volunteers. RESULTS Women have lower baseline detection and pain thresholds as compared to men. Furthermore, women but not men report i...

During driving sleeve of cast-in-place piles by vibratory hammers, soils were squeezed into sleeve and then soil plugging was formed. The physic-mechanical properties of the soil plug have direct influence on the load transmission between the sleeve wall and soil plug. Nevertheless, the researches on this issue are insufficient. In this study, finite element and infinite element coupling model ...

Assessment strategies are an important component in game theoretical models of contests. Strategies can be either based on one's own abilities (self assessment) or on the relative abilities of two opponents (mutual assessment). Using statistical methodology that allows discrimination between assessment types, we examined contests in the jumping spider Phiddipus clarus. In this species, aggressi...