Brian Spears on Muck Rack

Brian Spears

Toronto
As seen in: Nature, Canadian Broadcasting Corporation (CBC), PNAS, Houston Business Journal, Science Magazine, Sportsnet Canada, AIP Publishing, The Rumpus, NACDL, Redlands Community News
Senior Producer Hockey Night in Canada
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Articles

Integrated low-temperature PVC and polyolefin upgrading

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By Brian Spears, Yanliang Guo, Meera Shenoy, Wei Zhang
| Science Magazine Verified
Abstract Polyolefins and their chlorinated derivatives (e.g., PVC) are among the most prevalent plastics in global production and waste streams. Traditional waste-to-energy methods, such as incineration and pyrolysis, as well as most chemical upcycling methods for PVC utilization, require thorough, high-temperature dechlorination to prevent the release of toxic chlorinated compounds.
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Erratum for the Research Article “Improving metrology with quantum scrambling” by Z. Li et al.

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By Brian Spears, Yanliang Guo, Meera Shenoy
| Science Magazine Verified
Skip to main content Main content starts here In the Research Article “Improving metrology with quantum scrambling” (30 June 2023, 10.1126/ science.adg9500), equation 3 defines the out-of-time-ordered correlation (OTOC) function as ℐ(t)≡−12∂2ℱ(t)(∂δϕ)2∣δϕ=0=〈Sˆα(t)ρˆ(0)Sˆα(t)ρˆ(0)〉 This expression is incorrect, and the correct expression is given by ℐ(t)≡−12∂2ℱ(t)(∂δϕ)2∣δϕ=0=−12〈[ρ(0),S⌢α(t)]2〉=12C(t) where C(t) is called a squared commutator or double commutator (1, 2)...
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Robots that share our spaces require proprioception and a sense of touch

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By Brian Spears, Yanliang Guo, Meera Shenoy, Aude Billard
| Science Magazine Verified
Imagine stepping away from your desk and reaching out for your office’s light switch with your eyes closed. You might manage to complete the task successfully but might instead hit the corner of your desk or knock over the coffee mug your colleague just left behind. Your ability to successfully find the light switch while dodging these obstacles will depend on your sense of touch and your proprioception—your capacity to conceive of your body’s orientation in space.
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