Measuring the Atmosphere from Inside the Moon's Shadow
A total solar eclipse and its lunar shadow over Valencia de Don Juan turn a panorama into an experiment on the height and cooling of the atmosphere.
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From the notebook
Modeling the COVID-19 / Coronavirus pandemic – 4.Modeling with at time variable infection rate.
One of the most interesting aspects of the coronavirus is the time dependence of its infection rate. It determines how effective measures like quarantining can be. Spoiler: quite ineffective!
Modeling the COVID-19 / Coronavirus pandemic – 3.The effects of several populations
The next interesting question to ask when studying the coronavirus, is what is the effect of a mixed population which has different infection rates. That is, that some individuals are more infectious than others (e.g., a cashier in the supermarket vs. a farmer). Spoiler: it turns out that unless there are super-spreaders then all you care about is the arithmetic average of the transmission coefficient.
Modeling the COVID-19 / Coronavirus pandemic – 2.Simple Models
Armed with the data on the coronavirus such as the serial interval, incubation period, and the base growth rate, we are now in a position to start modeling the pandemic. Note that as the title suggests, these are simple models. Any conclusions drawn from this specific page should…
Modeling the COVID-19 / Coronavirus pandemic – 1.Background Data
This is the first in a series of posts in which I study the COVID-19 (coronavirus) pandemic. My original goal was to understand the behavior of the pandemic. As a scientists my curiosity forces me to not to leave such problems untouched. I wanted to know what are the possible…
03 / Fields of inquiry
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- 01Astrophysics
Stars, galaxies, cosmology, and the physical universe.
- 02Physics
Mechanics, thermodynamics, and useful physical reasoning.
- 03Climate
Climate systems, evidence, uncertainty, and interpretation.
- 04Computing
Numerical methods, software, and practical computation.
- 05Notes
Short observations from a scientist’s working notebook.