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SAE releases technical white paper on two new low-GWP refrigerants; alternates to R-1234yf

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They are both zeotropic mixtures, meaning that they exhibit a difference in compositions between liquid and vapor at equilibrium, and undergo a temperature change—often referred to as temperature glide—during evaporation or condensation.

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The LEO Satellite Industry Needs More Engineers

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He says lesson plans also are being developed for CubeSats , which are designed in a modular fashion based on the 10-by-10-by-10-centimeter base unit referred to as 1U. The group is building a database of the lesson plans to simplify matters, Gardill says. Researchers are testing larger CubeSats, from 3U to 6U, for commercial missions. “Our

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Yu Yuan on Building A Persistent Virtual World

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To spur progress in the advancement of those technologies, the IEEE Standards Association has launched the Persistent Computing for Metaverse initiative. Today’s technology is a long way from making that possible, says Yu Yuan , president of the IEEE Standards Association. His answers have been edited for clarity.

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ICCT: New RDE regulations not enough to control diesel car NOx fully; additional actions required

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Real-world NO x emissions from new diesel cars could still exceed the Euro 6 emission limit of 80 mg/km by a factor of three or more, even after the new Real-Driving Emissions (RDE) regulation takes effect, according to a new white paper released by the International Council on Clean Transportation (ICCT). times the Euro 6 limit.

Diesel 150
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Laying the Foundation for Extended Reality

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That is why the IEEE Standards Association (IEEE SA) is working to help define, develop, and deploy the technologies, applications, and governance practices needed to help turn metaverse concepts into practical realities, and to drive new markets. But there will be issues to deal with along the way.

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