The characterisation of transportation hazards is paramount for protective packaging validation. It is used to estimate and simulate the loads and stresses occurring during transport which are essential to optimise packaging and ensure that products will resist the transportation environment with the minimum amount of protective material. Characterising road transportation vibrations is rather ...

LIE pulmonary second sound plays an important role in the clinical diagnosis of congenital and acquired heart diseases. Since phonocardiographic recordings from the chest wall present the pulmonary valve sound as part of a composite of sounds produced by 2 valves of the heart, it was our interest to demonstrate the pulmonary sound by direct phonocardiography. Cardiac sounds and murmurs heard an...

We present a probe-based, phase-referenced low coherence interferometer in which the reference field is provided by a fiber end reflection. A gradient-index microlens focuses light onto a sample and collects reflected light. We use the probe interferometer to measure surface profiles of the compound eye of a housefly (Musca domestica) and measure nanometer-scale vibrations in a test sample.

Various textures are fabricated by a picosecond laser machine on the surfaces of circular stainless steel specimens. Vibrational and tribological effects surface investigated means tribometer data acquisition signal processing (DASP) system. Experimental results show that can reduce coefficients friction (COFs), enhance wear resistance, improve dynamical performance frictional surfaces. In this...

In this paper, a new non-contact ultrasonic abrasive finishing mechanism is designed and fabricated. This mechanism combines the function of ultrasonic vibrations and the magnetic abrasive finishing (MAF) process. A permanent magnet which is mounted on a horn has been used as the processing tool. This polishing tool is vibrated at an ultrasonic frequency with piezo-electric actuators. Ultrasoni...