Correspondence: [email protected] Vibrations of MRI systems impair the image quality and the results of studies in different ways. In functional studies the noise could affect the subjects brain activation [1] whereas in structural studies, especially diffusion tensor imaging (DTI), the vibrations could have direct or indirect impact on the image itself [2]. Setups for measuring and si...

The following paper discusses different aspects of railway bridge dynamics, comprising analysis, modelling procedures and experimental testing. The importance of realistic models is discussed, especially regarding boundary conditions, load distribution and soil-structure interaction. Two theoretical case studies are presented, involving both deterministic and probabilistic assessment of a large...

We study the resonant interaction of the OH stretch vibrations of water molecules at the surfaces of liquid water and ice using heterodyne-detected sum-frequency generation (HD-SFG) spectroscopy. By studying different isotopic mixtures of H2O and D2O, we vary the strength of the interaction, and we monitor the resulting effect on the HD-SFG spectrum of the OH stretch vibrations. We observe that...

The most likely way that the wall material might affect the sound produced is through its influence on the structural vibrations of the instrument. Recent experiments by Whitehouse et al have shown that blowing a lip-reed instrument excites vibrations in the instrument walls, primarily due to the motion of the oscillating lips against the mouthpiece [5, 6]. The amplitude of these vibrations dep...

We propose a novel method of heart attack treatment by low frequency diastolic timed vibrations. It can be applied quickly after the onset of symptoms by unspecialized personnel drastically improving the survival chances of the patient. The method is based on applying low frequency mechanical vibrations in synchronization with the heart cycle of the patient to facilitate disruption and clearanc...

Vibrations can significantly enhance touch perception for virtual environment applications with minimal design complexity and cost. In order to create realistic vibrotactile feedback, we collected vibrations, forces, and velocities during various tasks executed with a stylus: tapping on materials, stroking textures, and puncturing membranes. Empirical models were fit to these waveforms and a li...

American lobsters produce carapace vibrations, which also lead to waterborne acoustic signals, by simultaneously contracting the antagonistic remotor and promotor muscles located at the base of the second antenna. These vibrations have a mean frequency of 183.1 Hz (range 87-261 Hz), range in duration from 68 to 1720 ms (mean 277.1 ms) and lead to waterborne sounds of similar frequencies. Lobste...

Ground vibrations generated by heavy trucks and buses are a common source of environmental problem. They can reach levels that may cause nuisance to residents, damage to near-by structures, and perturbation in the functioning of sensitive equipment. These vibrations are produced mainly when the vehicle wheel’s pass over a speed reducer such as a road hump or a speed cushion. This study aims to ...

Rail transport is an environmentally responsible approach and traffic is expected to increase in the coming decades. Little is known about the implications for quality of life of populations living close to railways. This study explores the way in which vibrations from rail are perceived and described by these populations. The study took place in the Västra Götaland and Värmland regions of Swed...

There is only limited knowledge of the exposure to vibrations of ships' crews and their risk of vibration-induced health effects. Exposure to hand-arm vibrations from the use of vibrating tools at sea does not differ from that in the land-based trades. However, in contrast to most other work places, seafarers are also exposed to vibrations to the feet when standing on vibrating surfaces on boar...