Improvement of the night sleep quality by electrocutaneous subthreshold stimulation synchronized with the slow wave sleep.

Changes in sleep characteristics were studied under the non-wake-up stimulation with current pulses of less than 1 μA on average, applied to the palmar surface skin receptors during Δ-sleep. A significant increase in duration of the first and second cycles of deep sleep has been found, as well as a shorter latent period before the Δ-sleep onset and a longer time of the rapid sleep (REM phase). The sleep structure improvement was accompanied by the reduced reactive anxiety and depression and an increase in subjective physical efficiency.

An electrical impedance tomography system for gynecological application GIT with a tiny electrode array.

The paper describes the development of an electrical impedance tomography (EIT) system for gynecologic research. The GIT (gynecological impedance tomography) system has 48 electrodes and is embedded on a small space (30 mm diameter and 20 mm height) inside of the vaginal probe. The system provides real-time (one shot per second) 3D visualization of the spatial distribution of the static electrical properties of the cervix tissue.

Characteristics of relativistic electron mirrors generated by an ultrashort nonadiabatic laser pulse from a nanofilm.

For controllable generation of an isolated attosecond relativistic electron bunch [relativistic electron mirror (REM)] with nearly solid-state density, we proposed [V. V. Kulagin, Phys.

Peculiarities of the Anisimkin Jr.' plate modes in LiNbO3 and Te single crystals.

Quasi-longitudinal (QL) Anisimkin Jr.' modes discovered recently in quartz plates are found now in 2 other piezoelectric crystals, belonging to trigonal symmetry. In 128 degrees Y, X+90 degrees-LiNbO3, 2 different QL modes may propagate simultaneously for small plate thickness h/lambda = 0 to 0.

Review of shear surface acoustic waves in solids.

General considerations about physical reasons for the existence of surface acoustic waves and, in particular, shear surface acoustic waves in solids are presented. The results of calculations for various types of shear surface acoustic waves are described, and corresponding physical explanations are given.

Properties of the Anisimkin Jr.' modes in quartz plates.

Dispersion curves, surface displacements, and displacement profiles over the plate thickness are numerically calculated for acoustic plate modes, propagating in fused and Y-rotated, X-cut quartz samples with thickness h/lambda in the range 0-4.5 (h, thickness; lambda, wavelength). The Anisimkin Jr.

Optical theorem for electromagnetic field scattering by dielectric structures and energy emission from the evanescent wave.

We present an optical theorem for evanescent (near field) electromagnetic wave scattering by a dielectric structure. The derivation is based on the formalism of angular spectrum wave amplitudes and block scattering matrix. The optical theorem shows that an energy flux is emitted in the direction of the evanescent wave decay upon scattering.

Functional imaging of the human body.

Design principles for apparatus and methods of safe, noninvasive functional imaging of a human organism by mapping physical electromagnetic fields are presented. The methods covered are infrared dynamic thermoimaging, radiothermal imaging, acoustothermometry, magnetic mapping of the heart and brain, electric imaging, and optical multispectral mapping.