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Time is shorter than you think!
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This video written & produced in collaboration with Aatish Bhatia, https://www.aatishb.com
This video is about how cheap, fast, and LESS sensitive rapid antigen tests might be better for screening (& maybe surveillance) than PCR COVID tests due to the nature of contagiousness/infectiveness at various points on the viral load trajectory of symptomatic and asymptomatic COVID sars-COV-2 carriers.
REFERENCES
Thanks to Daniel Larremore for feedback on early versions of this video https://larremorelab.github.io/
Rapid Antigen Testing:
COVID-19 testing: One size does not fit all. https://science.sciencemag.org/content/371/6525/126
Rethinking Covid-19 Test Sensitivity — A Strategy for Containment. https://www.nejm.org/doi/full/10.1056/NEJMp2025631
Test sensitivity is secondary to frequency and turnaround time for COVID-19 screening. https://advances.sciencemag.org/content/7/1/eabd5393.abstract
The effectiveness of population-wide, rapid antigen test based screening in reducing SARS-CoV-2 infection prevalence in Slovakia. (pre-print, not yet peer reviewed) https://www.medrxiv.org/content/10.1101/2020.12.02.20240648v1
Effective Testing and Screening for Covid-19. https://www.rockefellerfoundation.org/wp-content/uploads/2020/09/A-National-Decision-Point-Effective-Testing-Screening-for-Covid-19-Full-Report.pdf
Brown University & Harvard University modeling of COVID-19 testing shortfall. https://globalepidemics.org/testing-targets/
Fast Coronavirus Tests are coming. https://media.nature.com/original/magazine-assets/d41586-020-02661-2/d41586-020-02661-2.pdf
Open letter signed by epidemiologists and infectious disease experts supporting widespread & frequent rapid antigen testing for COVID-19: https://www.rapidtests.org/expert-letter
More information on various COVID-19 tests: https://chs.asu.edu/diagnostics-commons/testing-commons
Field performance and public health response using the BinaxNOW Rapid SARS-CoV-2 antigen detection assay during community-based testing. https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaa1890/6052342
Performance of an Antigen-Based Test for Asymptomatic and Symptomatic SARS-CoV-2 Testing at Two University Campuses. https://www.cdc.gov/mmwr/volumes/69/wr/mm695152a3.htm
Asymptomatic Spread:
People without symptoms spread virus in more than half of cases, CDC model finds https://www.washingtonpost.com/science/2021/01/07/covid-asymptomatic-spread/
(More than half of all) SARS-CoV-2 Transmission From People Without COVID-19 Symptoms. https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2774707
Three Quarters of People with SAR
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This video is chapter 7 in my series on special relativity, and it covers the idea that some things AREN'T relative: there IS a sense of absolute length and absolute time, which can be agreed upon from all moving perspectives (as long as they're inertial reference frames). In particular, proper length and proper time, aka the spacetime interval. Essentially, this is the spacetime version of the pythagorean theorem, and we'll explore it using the Lorentz transformations of lengths and time intervals, enacted with a mechanical minkowski diagram, aka mechanical Lorentz transformation, aka spacetime globe.
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Concrete doesn’t dry - it sets!
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More about the hydration reaction: http://iti.northwestern.edu/cement/monograph/Monograph5_3.html
Portland Cement Hydration: http://people.ce.gatech.edu/~kk92/hyd07.pdf
Calcium Silicate Hydrate: https://en.wikipedia.org/wiki/Calcium_silicate_hydrate
How concrete gets stronger and cures over time: https://courses.washington.edu/cm425/strength.pdf
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How Airplanes Are Made: https://www.youtube.com/watch?v=7rMgpExA4kM
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
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Where to Buy "How To" by Randall Munroe:
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The world's most entertaining and useless self-help guide, from the brilliant mind behind the wildly popular webcomic xkcd and the #1 New York Times bestsellers What If? and Thing Explainer
For any task you might want to do, there's a right way, a wrong way, and a way so monumentally complex, excessive, and inadvisable that no one would ever try it. How To is a guide to the third kind of approach. It's full of highly impractical advice for everything from landing a plane to digging a hole.
Bestselling author and cartoonist Randall Munroe explains how to predict the weather by analyzing the pixels of your Facebook photos. He teaches you how to tell if you're a baby boomer or a 90's kid by measuring the radioactivity of your teeth. He offers tips for taking a selfie with a telescope, crossing a river by boiling it, and powering your house by destroying the fabric of space-time. And if you want to get rid of the book once you're done with it, he walks you through your options for proper disposal, including dissolving it in the ocean, converting it to a vapor, using tectonic plates to subduct it into the Earth's mantle, or launching it into the Sun.
By exploring the most complicated ways to do simple tasks, Munroe doesn't just make things difficult for himself and his readers. As he did so brilliantly in What If?, Munroe invites us to explore the most absurd reaches of the possible. Full of clever infographics and amusing illustrations, How To is a delightfully mind-bending way to better understand the science and technology underlying the things we do every day.
REFERENCES
How To (Randall Munroe) - see above for links!
Rock melting points
http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/meltrock.html
Syracuse University Researchers Make Lava Using Keweenawan Basalt
http://lavaproject.syr.edu/making-lava/making.html
BEDROCK GEOLOGY OF WISCONSIN MAP: UNIVERSITY OF WISCONSIN–EXTENSION Geological and Natural History Survey
Electric Furnace
https://www.amazon.com/Automatic-Electric-Refining-Precious-Aluminum/dp/B07LCKKFWX/
Large Geothermal Power Plants
https://www.worldatlas.com/articles/largest-geothermal-power-plants-in-the-world.html
https://www.calpine.com/operations/power-operations/our-locations/california/ridge-line
Coal Power Plant Capacity
https://www.talenenergy.com/plant/colstrip/
The size of an A19 or A21 Lightbulb
https://blog.1000bulbs.com/home/a21-vs-a19
Low melting point Vanadate glass
https://iopscience.iop
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A brief intro to the current theory of (almost) everything - the Standard Model of particle physics. It's like cake, only universal.
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NEW ALBUM!! -- http://juliansaporiti.bandcamp.com/album/lusitania
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Why isn't the sky violet?
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Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute!
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