Certain pathological conditions, such as malignant tumours, manifest themselves as changes in the tissue's mechanical stiffness. This is the basis for palpation. Several techniques for imaging tissue elasticity using ultrasound have been proposed: compression elastography (strain imaging), transient elastography and vibration sonoelastography. The latter involves imaging of vibration patterns r...

A great difficulty is faced in the design of such structures due to the fact that the reduction in weight results in low rigidity and reduced vibration characteristics. Apart from the vibration is effectively controlled; it may destabilize the system and may, very often, result in complete failure of the system. Several advanced applications, such as those in jet fighters, automobiles and space...

MATERIALS REFERENCE ISSUE Ability to both feel and hear the results of engineering decisions via a “virtual car” – simultaneous engineering – can significantly shorten vehicle development time. Sound quality and discrete vibration at the driver’s position may be predicted and ‘driven’ before the first prototype is built. Although sound quality cannot yet be predicted in an unknown chassis, the ...

MATERIALS REFERENCE ISSUE Ability to both feel and hear the results of engineering decisions via a “virtual car” – simultaneous engineering – can significantly shorten vehicle development time. Sound quality and discrete vibration at the driver’s position may be predicted and ‘driven’ before the first prototype is built. Although sound quality cannot yet be predicted in an unknown chassis, the ...

In recent years, the use of wireless sensor networks for vibration monitoring is emphasized, because of its capability to continuously monitor at hard-to-reach locations of complex machines. Low power consumption is one of the main requirements for the sensor nodes in continuous and long-term vibration monitoring. However, the power consumption of state-of-the-art wireless sensor nodes is signi...

glutamate-mediated excitotoxicity and neurodegeneration have been shown as pathophysiological hallmarks of multiple sclerosis (ms) and other autoimmune inflammatory cns disorders. n‑methyl‑d‑aspartate (nmda) receptors play a pivotal role in the mediation of neuronal glutamate excitotoxicity leading to cellular damage and apoptotic cell death. current treatment approaches targeting glutamate exc...

goldfish carassius auratus were subjected to either formalin (250 ppm) or nacl (10 ppt), over a 0.5-h period followed by 24-h freshwater exposure. serum biochemistry was monitored before exposure (0), immediately after (0.5) plus 3 and 24 h after exposure. results showed that both formalin and nacl treatments caused rapid increase in cortisol with a peak at 3 h, which did not recover until 24 h...

BACKGROUND Neuromuscular electrical stimulation (NMES) is commonly used to activate skeletal muscles and reverse muscle atrophy in clinical populations. Clinical recommendations for NMES suggest the use of short pulse widths (100-200 μs) and low-to-moderate pulse frequencies (30-50 Hz). However, this type of NMES causes rapid muscle fatigue due to the (non-physiological) high stimulation intens...

Background: Workers who use hand-held vibrating tools may experience finger blanching attacks due to episodic vasospasm in the digital vessels. In occupational medicine, the pathological consequences to the exposure to handtransmitted vibration are known as vibration induced white finger (VWF). In many cases, workers are recommended to use anti-vibration gloves and a standard procedure (ISO 108...