Results 241 to 250 of about 151,983 (299)

Piezoelectric effect in renal calculi

IEEE Transactions on Biomedical Engineering, 1991
The piezoelectric effect is investigated for the first time in renal calculi in vitro. The kidney stones are shaped from solid samples as well as from stones crushed into powder and pressed into tablets. Presence of alpha quartz in the renal calculi is investigated by an X-ray technique and the presence of this constituent also helps to explain the ...
Vikas R. Singh, Ravinder Agarwal, Ved Singh   +2 more
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THE DISCOVERY OF THE PIEZOELECTRIC EFFECT

Archive for History of Exact Sciences, 2003
L'effet piezo-electrique a ete mis en evidence en 1880 par les freres Pierre et Jacques Curie. La decouverte de ce phenomene a pour origine un travail experimental et s'appuie a la base sur une theorie elaboree en reliant ce phenomene a la geometrie atomique des cristaux et en enoncant ses principales lois.
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Origin of the piezoelectric effect in bone

Calcified Tissue Research, 1971
The piezoelectric effect was measured in samples of human bone and repeated with the same samples after either demineralization or decollagenation. The results indicate that at least part and possibly all of the piezoelectric effect found in whole bone arises from the organic component. The existence of two alternatives results from the unknown role of
A A, Marino, R O, Becker, S C, Soderholm
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Piezoelectric drill based on converse piezoelectric effect

2008 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications, 2008
A new type of mode convert piezoelectric drill is presented. The drill uses converse piezoelectric effect to work. When exciting voltage is applied on piezoelectric ceramics, the basic structure of the drill will produce longitudinal vibration, which will be converted to local bending vibration by the drill bit fixed on the basic structure with an ...
Lin Yang, Qing-jun Ding, Chun-sheng Zhao
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Dual piezoelectric beam robot: The effect of piezoelectric patches’ positions

Journal of Intelligent Material Systems and Structures, 2015
Inspired from linear traveling wave ultrasonic motors, a dual piezoelectric beam robot is presented. It consists of an aluminum beam structure, with two non-collocated piezoelectric patches bonded on its surface. The aim of this article is to study the effect of the piezoelectric patches’ positions on the performance of the robot.
Hariri, H., Bernard, Y., Razek, A.
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The piezoelectric effect

CEIDP '05. 2005 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, 2005., 2005
In spite of the successful production of a variety of piezoelectric devices, the true origin of the piezoelectric effect is often obscure and the devices not necessarily optimised. Consideration of the underlying electromechanical physics of the phenomenon shows that it is closely associated with double layers of nanometric dimension generated in the ...
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Radiation piezoelectric effect

Physics Letters A, 1976
Abstract The results of experimental investigation of a new phenomenon - appearance of an emf across a single germanium sample subject both to irradiation with charged particles and to uniaxial deformation in a direction perpendicular to the particle beam (radiation piezoelectric effect - RPE) - are reported.
I.K. Kikoin, L.I. Kikoin, S.D. Lasarev
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Piezoelectric Effects in Collagen

Japanese Journal of Applied Physics, 1964
The direct and converse piezoelectric effects have been observed in the Achilles tendon of ox and horse, which consists of collagen fibers in which the collagen molecules are highly orientated and crystallized. The matrix of piezoelectric constant is concordant with that derived for and unidirectionally oriented system of crystallites of collagen with ...
Eiichi Fukada, Iwao Yasuda
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Piezoelectricity Effect Detector

Kristall und Technik, 1974
AbstractAn apparatus for the detection of the piezoelectricity effect in non‐conducting crystals is described. It is possible to mark the crystal resonance frequency and show the resonance curve on the oscilloscope, both with or without mechanical contact between the crystal and electrodes.
J. Grochowski, B. Stasicki
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Investigation on Multi-Piezoelectric Effects from the First Positive Piezoelectric Effect

Key Engineering Materials, 2014
Based on the traditional piezoelectric effect theory, the process of multi-piezoelectric effects generation is analyzed and the theory of the secondary and tertiary piezoelectric effect is deduced by four kinds of piezoelectric equations. Experimental research is performed through the PZT-5 piezoelectric ceramics stack, the existence of multi ...
Li Ping Shi, Jie Huang, Xi Wen Wei, Yan Bo Wei   +3 more
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