National Institute of Standards and Technology (NIST) researchers have developed a dc and ac Josephson voltage standard system that produces output voltages of up to 0.25V, making possible far more precise measurements and comparisons with existing power-detection-based ac voltage standards. Currently, the team is striving to achieve output voltages of 0.5 to 1V, which would reduce uncertainties in ac voltage measurements by three to four orders of magnitude, similar to today's dc volt standards that are based on quantum effects.
Artificially created metamaterials are already appearing in niche applications like electronics, communications, and defense, says a new report from Lux Research. How quickly they become mainstream depends on cost-effective manufacturing methods, which will include additive manufacturing.
Sharon Glotzer and David Pine are hoping to create the first liquid hard drive with liquid nanoparticles that can store 1TB per teaspoon. They aren't the first to find potential data stores, as Harvard researchers have stored 700 TB inside a gram of DNA.
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