Researchers at Duke Universitys Pratt School of Engineering have captured the best images ever produced of "sprites" -- mysterious flashes of light resembling giant undulating jellyfish that can occur above strong thunderstorms -- using a high-speed camera that recorded thousands of video frames a second.
The researchers said their findings could lead to a better understanding of the physics and chemistry of this fleeting, still-unexplained lightning phenomenon. They recorded and analyzed video of sprites associated with powerful thunderstorms occurring over the Great Plains during the summer of 2005. Their findings are scheduled to appear online in Geophysical Research Letters on Feb. 22. The research was supported by the National Science Foundation.
"By analyzing the high-speed images in sequence, weve been able to clearly define, for the first time, the processes by which sprites develop and what happens inside of them," said Steven Cummer, assistant professor of electrical and computer engineering at Dukes Pratt School. "This understanding of sprite structure is a necessary step to further elucidate sprite dynamics and their possible effects on the upper atmosphere."
Kendall Morgan | EurekAlert!
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Russian researchers together with their French colleagues discovered that a genuine feature of superconductors -- quantum Abrikosov vortices of supercurrent -- can also exist in an ordinary nonsuperconducting metal put into contact with a superconductor. The observation of these vortices provides direct evidence of induced quantum coherence. The pioneering experimental observation was supported by a first-ever numerical model that describes the induced vortices in finer detail.
These fundamental results, published in the journal Nature Communications, enable a better understanding and description of the processes occurring at the...
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
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Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
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