One of the most effective methods treating intravascular formations at present is use stepped ultrasonic waveguide systems a tubular type (concentrators-waveguides) with hollow spherical tip, presence which makesit possible to supply liquid media dislocation zone an formation aim additional cavitation effect and as efficiently possible. destroy due vibration impact. Based on results analysis fe...

In the recent decade metamaterials with magnetic permeability different than unity and unusual response to the magnetic field of incident light have been intensively explored. Existence of magnetic artificial materials created an interest in a scanning near-field magnetic microscope for studies of magnetic responses of subwavelength elementary cells of those metamaterials. We present a method o...

Planar waveguides are useful to transport, concentrate and distribute light uniformly over large dimensions. Their capacity to collect and gather light efficiently over a large distance is interesting for many applications, like backlighting and solar concentration. For these reasons, the possibility of making them even more efficient could be of considerable interest for the community. The obs...

Fresnel lens solar concentrators continue to fulfill a market requirement as a system component in high volume cost effective Concentrating Photovoltaic (CPV) electricity generation. Design and optimization may be performed using comprehensive system simulation tools, but before investing in the effort to build a complete virtual model framework, much insight can be gathered beforehand by gener...

The technical and economic sustainability of photovoltaic (PV) systems is heavily affected by the cost and performances of the adopted PV cells. Solar concentrators represent an effective alternative to reduce the solar cell surface and, at the same time, to increase the global conversion efficiency. Such systems include optic elements to concentrate the solar radiation to a small area where hi...

MOTIVATION In response to the DOE SunShot initiative to achieve utility scale solar power generation at $1 per watt peak, Sandia National Laboratories is investigating a microsystems-enabled photovoltaics (MEPV) approach that combines the high conversion efficiencies of concentrated photovoltaics (CPV) with the form factor and low system costs of flat panel PV. MEPV combines solar cells having ...