Background and aims. One important treatment objective of periodontal therapy is the removal of bacterial deposits and the arrest of disease progression. The aim of the present study was to compare subgingival plaque removal using hand curettes, magnetostrictive ultrasonic scalers and air-polishing devices (APD) with and without NaHCO3 abrasive powder. Materials and methods. In this controlled ...

A hybrid nonlinear optimal control design is experimentally implemented on a magnetostrictive Terfenol-D actuator to illustrate enhanced tracking control at relatively high speed. The control design employs a homogenized energy model to quantify rate-dependent nonlinear and hysteretic ferromagnetic switching behavior. The homogenized energy model is incorporated into a finite-dimensional nonlin...

This paper presents a light and compact optical fiber Bragg Grating sensor for DC and AC magnetic field measurements. The fiber is coated by a thick layer of a magnetostrictive composite consisting of particles of Terfenol-D dispersed in a polymeric matrix. Among the different compositions for the coating that were tested, the best magnetostrictive response was obtained using an epoxy resin as ...

In this paper, we designed a new detecting system of bridge cables with a snake-shaped robot. It can solve the problems such as inefficiency and danger of aloft work in the bridge detecting by workers. The detecting system of the bridge cables includes: a snake-shaped robot; a multiple and monocular vision detection module; a nondestructive magnetic leakage detecting module; a magnetostrictive ...

This paper presents research carried out at the University of Southampton into the development of a magnetostrictive thick-film material suitable for use with silicon micromachined devices. This form of magnetostrictive material has previously been deposited onto alumina substrates and this paper reports further work on migrating the technology onto silicon. The evaluation of two alternative gl...

This paper addresses the modeling of strains generated by magnetostrictive transducers in response to applied magnetic elds. The measured strains are dependent upon both the rotation of moments within the material in response to the eld and the elastic properties of the material. The magnetic behavior is characterized through the consideration of the Jiles-Atherton mean eld theory for ferromagn...

This study reports the effects of post-growth He + irradiation on magneto-elastic properties a Ni/Fe multi-layered stack. The progressive intermixing caused by at interfaces multilayer allows us to tune saturation magnetostriction value with increasing fluences and even induce reversal sign magnetostrictive effect. Additionally, critical fluence which absolute is dramatically reduced identified...