The “island effect” is one of the main problems in photovoltaic compound solar systems.

The doctoral thesis of Pablo Sanchis, presented in the Public University of Navarre (Basque Country), proposes three main contributions: the first one is a new control strategy of a booster inverter for autonomous systems; the second one is a new implementation of impedance measurement method, and the third one, a new methodology for the design of drift method in frequency, which guarantees with t

A special place on the market of food supplements belongs to ecdysteroid-containing preparations that are helpful as a tonic for sportsmen during intensive training sessions, for people of various professions connected with physical and psychological stresses, and also for elderly people. Ecdysteroids heal wounds and burns.

A plant containing very high concentrations of ecdysteroids has been found by a team headed by Vladimir Volodin from the Institute of Biology in Syktyvkar. This is saw-w

An international team of astronomers, led by scientists at the University of Manchester have produced new evidence that most of the energy in the Universe is in the form of the mysterious “Dark Energy”. The new evidence comes from a 10-year census of the sky for examples of gravitational lenses, which are seen when a galaxy bends the light from a distant quasar to form several images of the same quasar. Linking the number of lenses they found with the latest information on the numbers of galaxies, th

A diet rich in flaxseed seems to reduce the size, aggressiveness and severity of tumors in mice that have been genetically engineered to develop prostate cancer, according to new research from Duke University Medical Center. And in 3 percent of the mice, the flaxseed diet kept them from getting the disease at all.

“We are cautiously optimistic about these findings,” said Wendy Demark-Wahnefried, Ph.D., associate professor, division of urology and senior author of the study that appears in t

The success of many advanced technologies that use devices such as sensors and actuators, including gyroscopes and optical devices, depends on microscopic components called microelectromechanical systems (MEMS) devices made of polycrystalline silicon (polysilicon). Researchers at Case Western Reserve University report in the November 8 issue of Science that miniature micron-sized polysilicon laboratory specimens subjected to cyclic tension/compression loading undergo fatigue, and could ultimately fa

Phoning home from 93 billion miles away–only E.T. and other science fiction characters can do that. But with the help of National Institute of Standards and Technology (NIST) know-how, reality soon may catch up with imagination.

Conceptual designs for a “realistic interstellar explorer,” or RISE — a highly autonomous craft that would travel far beyond this solar system to collect scientific data — call for a laser-based communications link to Earth that relies in part on a recent NIST i