1-3-Type Composites Based on Ferroelectrics:Electromechanical Coupling, Figures of Merit, and Piezotechnical Energy-Harvesting Applications

The physical and microgeometric factors that are able to improve the piezoelectric performance, anisotropy, and energy-harvesting characteristics of modern 1-3-type composites based on ferroelectrics are discussed. The composite connectivity patterns of particular interest for this study include 1-3-0, 1-0-3, and 1-2-2. The active components of the studied composites are chosen from conventional perovskite-type ferroelectric ceramics, lead-free materials, or domain-engineered single crystals, all of which exhibit particularly intriguing electromechanical properties. Examples of the large anisotropy of piezoelectric coefficients, electromechanical coupling factors, squared figures of merit, and large hydrostatic parameters of the three-component 1-3-type composites are considered in the context of their piezotechnical applications. The applications of these materials include piezoelectric transducers, sensors, energy-harvesting, and hydroacoustic devices.</p

PSYCHOLOGICAL INTELLIGENT INTERFACE FOR ADAPTIVE COMMUNICATION OF USER WITH COMPUTER SYSTEM

The psychological intelligent interface has been developed. The methods of conceptual modelling, mathematical statistics, personal psychodiagnosis and also the methods of programming have been used. The program implementation has been carried out on the language CLIPPER 5.2 in the operating system MS/DOS. The problem of the computer system adaptation to the user on base of his psychophysiological and intelligent identification has been formatulated and solved firstly. The program implementation of the psychological intelligent interface has been created. The work results have been introduced in a number of the organizationsAvailable from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio