3,643 research outputs found
Review of book-Ultrasound in Otorhinolaryngology
Ultrasonic therapy for certain diseases is discussed. Success is reported in the treatment of chronic tonsilitis, sinusitis, and Meniere's disease
Restoration of physical performance capacity of athletes after prolonged restriction of their motor activity
The effects of different regimens of treatment following prolonged hypokinesia were studied in order to determine the most effective program. The types of programs considered were passive means, consisting of physical therapy; active means, consisting of athletic training; and a combined program. In the first stage of the experiment, the effects of a 10 day period of hypokinesia were studied. It was determined that the restoration programs must address the problems of: (1) increasing defense function and general tone of the body; (2) restore orthostatic stability; and (3) increase general endurance. In later stages, groups of athletes and nonathletes underwent 30 day periods of hypokinesia. Restoration was carefully monitored for groups treated with the various regimens. It was determined that the most effective treatment was a comprehensive program of passive and active therapy
Dynamics of anisotropic frustrated antiferromagnet Cs2CoBr4 in a spin-liquid regime
Cs2CoBr4 is a triangular-lattice antiferromagnet which can be viewed as
weakly interacting spin chains due to spatially anisotropic frustrating
exchange couplings. The spin-orbit interaction in Co(2+) spin-3/2 ions leads to
a strong easy-plane single-ion anisotropy which allows to consider the
low-energy spin dynamics of this system using an anisotropic pseudospin-1/2
model. By means of the electron spin resonance (ESR) technique, we study the
spin dynamics of Cs2CoBr4 in magnetic field in a spin-liquid regime, i.e.,
above the N'eel temperature of 1.3 K but below the temperature of the crossover
to in-chain correlations of pseudospins (6 K). Our experiments reveal two
bright branches of excitations which strongly differ both from excitations in
the low-temperature ordered phases and from high-temperature paramagnetic
resonance of uncorrelated pseudospins and spins. These two branches are
interpreted as excitations with zero momentum of an anisotropic spin-1/2 chain.
Besides, we observe several weak modes of unknown origin which arise mostly as
satellites of one of the bright modes.Comment: 9 pages, 10 figure
Shuttle Mechanism for Charge Transfer in Coulomb Blockade Nanostructures
Room-temperature Coulomb blockade of charge transport through composite
nanostructures containing organic inter-links has recently been observed. A
pronounced charging effect in combination with the softness of the molecular
links implies that charge transfer gives rise to a significant deformation of
these structures. For a simple model system containing one nanoscale metallic
cluster connected by molecular links to two bulk metallic electrodes we show
that self-excitation of periodic cluster oscillations in conjunction with
sequential processes of cluster charging and decharging appears for a
sufficiently large bias voltage. This new `electron shuttle' mechanism of
discrete charge transfer gives rise to a current through the nanostructure,
which is proportional to the cluster vibration frequency.Comment: 4 pages, 4 figure
Effects of bischofite gel on reparative processes in wound healing
The study showed that the best results were obtained with external use of the gel with bischofite. Actovegin has a less significant but pronounced reparative effect on this model. The least satisfactory results were obtained when applying Contractube
Selective sensitivity in Kerr microscopy
A new technique for contrast separation in wide-field magneto-optical Kerr microscopy is introduced. Utilizing the light from eight light emitting diodes, guided to the microscope by glass fibers and being switched synchronously with the camera exposure, domain images with orthogonal in-plane sensitivity can be displayed simultaneously at real-time, and images with pure in-plane or polar contrast can be obtained. The benefit of this new method of contrast separation is demonstrated for Permalloy films, a NdFeB sinter magnet, and a cobalt crystal. Moreover, the new technique is shown to strongly enhance the sensitivity of Kerr microscopy by eliminating parasitic contrast contributions occurring in conventional setups. A doubling of the in-plane domain contrast and a sensitivity to Kerr rotations as low as 0.6 mdeg is demonstrated. © 2017 Author(s)
Identifying Cu-oxo species in Cu-zeolites by XAS: A theoretical survey by DFT-assisted XANES simulation and EXAFS wavelet transform
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