The experimental validation of an efficient iterative technique for compensating known position errors in a spherical near to far-field transformation (NTFFT) for elongated antennas using a minimum number of near-field (NF) measurements has been provided. This transformation exploits a non-redundant sampling representation of the voltage detected by the probe obtained by modeling a long antenna with a prolate ellipsoid.
Under a technology 2 market R&D contract with the DOE, CEO Hank Price of Solar Dynamics did the math on operating a tower CSP project in Arizona or California as a solar version of a typical gas peaker plant, by storing all of its solar energy thermally to be delivered in the evening just for 5 or 6-hours as dispatchable CSP (D-CSP). (see how CSP thermal solar storage works).
A Berkeley Lab-led research team has discovered a surprising set of chemical reactions involving magnesium that degrade battery performance even before the battery can be charged up. The findings could steer the design of next-gen batteries.
'The autonomous HydroCamel II integrates state-of-the-art technologies, including high-level maneuvering in six degrees of freedom and an ability to dive almost vertically,' says Professor Hugo Guterman of the BGU Department of Electrical and Computer Engineering and head of LAR. 'Until now, these capabilities were limited to remotely operated underwater vehicles (ROVs), which must be tethered by an umbilical cable to a host ship for its power and air source. The HydroCamel II is completely autonomous.'
Researchers use liquid metal to create atom-thick 2-D never before seen in nature. The research could transform how we do chemistry and could also be applied to enhance data storage and make faster electronics.
For some crystalline catalysts, what you see on the surface is not always what you get in the bulk, according to two studies led by the Department of Energy's Oak Ridge National Laboratory. The investigators discovered that treating a complex oxide crystal with either heat or chemicals caused different atoms to segregate on the surface, i.e., surface reconstruction. Those differences created catalysts with dissimilar behaviors, which encouraged different reaction pathways and ultimately yielded distinct products.
Power on the go is in demand: The higher the battery capacity, the larger the range of electric cars and the longer the operating time of cell phones and laptops. Dr. Jennifer Ludwig of the Technical University of Munich (TUM) has developed a process that allows a fast, simple, and cost-effective production of the promising cathode material lithium cobalt phosphate in high quality. The chemist was awarded the Evonik Research Prize for her work.
To make natural gas and biogas suitable for use, the methane has to be separated from the CO2. This involves the use of membranes: filters that stop the methane and let the CO2 pass through. Researchers at KU Leuven (University of Leuven), Belgium, have developed a new membrane that makes the separation process much more effective.
UW and UCLA engineers have developed a flexible sensor 'skin' that can be stretched over any part of a robot's body or prosthetic to accurately convey information about shear forces and vibration, which are critical to tasks ranging from cooking an egg to dismantling a bomb.
Osaka University-led research team develops new way of processing the non-stick fluoropolymers, PTFE. A heating element is added to a plasma chamber for treatment of PTFE. The combined effects of the heat and plasma enable the non-stick surface of PTFE to strongly bind to a rubber surface.