A NIST team has been awarded 40 million hours of computer time per year for two years to support the study of the design of rheometers for large-particle dense suspensions such as concrete.
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A representative “puncture” caused by dielectric breakdown of the alumina. A surface pit formed by grain pull-out is circled red, although there are clearly many. (Credit: Shetty, et al; Wiley.) …
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Net zero energy homes have energy-generating systems such as solar panels, geothermal heat pumps, and highly energy efficient systems with zoned HVAC, LED and CF lighting, and in-home smart grids to run appliances, electronics, and equipment.
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Glassy SiOC sensors responded well to NO2 below 400°C. Above 400°C, sensitivity to NO2 disappears, and they become responsive to H2, but the concentration is much higher—5 ppm for NO2 compared to 2,000 ppm for H2.
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Researchers discovered the VO2 triple point where three solid phases exist in equilibrium at 65°C and zero stress.
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The kilogram is the only base unit in the SI system defined by an object—a platinum-iridium alloy cylinder kept in a vault in France. Efforts are underway to define…
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Bay area mechanical engineer Ben Krasnow makes silica aerogel in this demonstration in his home laboratory, one of many he has published on YouTube. (Credit: Krasnow; YouTube.) I learned a…
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Image above: Inflammation of mice lungs after exposure to titania nanobelts. Credit: Environmental Health Perspectives; NIH. The “discovery” of nanomaterials about 15 years ago sparked the imaginations of researchers, and…
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