Saturday 17 November 2018

ELECTRICAL TRANSPARENCY

 Definition :- 
                           Transparent conducting oxides (TCOs), which have high transparency through the visible spectrum and high electrical conductivity are already being used in numerous applications. ... A thin conducting layer on or in between the glass panes achieves this.
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The audio speaker represents a robust proof of concept for ionic conductors because producing sounds across the entire audible spectrum requires both high voltage (to squeeze hard on the rubber layer) and high-speed actuation (to vibrate quickly)—two criteria which are important for applications but which would have ruled out the use of ionic conductors in the past.
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To make the speaker, a membrane of transparent, insulating rubber is sandwiched between two layers of transparent, conductive gel. The electrical connection to the power source is established outside of the active region of the device, where it does not need to be transparent. Credit: Christoph Keplinger, Jeong-Yun Sun...
Related imageThe traditional constraints are well known: high voltages can set off electrochemical reactions in ionic materials, producing gases and burning up the materials. Ions are also much larger and heavier than electrons, so physically moving them through a circuit is typically slow. The system invented at Harvard overcomes both of these problems, opening up a vast number of potential applications including not just biomedical devices, but also fast-moving robotics and adaptive optics.
Related image "It must seem counterintuitive to many people, that ionic conductors could be used in a system that requires very fast actuation, like our speaker," says Sun. "Yet by exploiting the rubber layer as an insulator, we're able to control the voltage at the interfaces where the gel connects to the electrodes, so we don't have to worry about unwanted chemical reactions. 
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The input signal is an alternating current (AC), and we use the rubber sheet as a capacitor, which blocks the flow of charge carriers through the circuit. As a result, we don't have to continuously move the ions in one direction, which would be slow; we simply redistribute them, which we can do thousands of times per second."
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Power Minister Launches App For Transparency In Due To Gencos From Discoms
                The power ministry on Tuesday launched a web application that seeks to bring transparency in dues of power generators from power distribution companies. The app—christened Prapti (payment ratification and analysis in power procurement for bringing transparency in involving of generators—will bring transparency in the payments due to power producers from power distribution companies, power minister R K Singh said. The minister said health of power generator companies was a concern. “This app will go a long way in addressing it. Prompt payments will make generators healthier,” he said, adding this will also enable the banks to recover dues in time.

TRANSPARENCY

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