Archive page 13 of 73
Aug 5, 2020
This study reviews the 2018-2020 Ebolavirus outbreak in the Democratic Republic of Congo. Ebolavirus is a viral hemorrhagic fever principally transmitted via bodily fluids. The mortality rate among victims is approximately fifty…
May 31, 2020
My favorite set of differential equations are the Lotka-Volterra equations. These equations describe predator-prey relationships. What impresses me the most about them are their complete simplicity: $$ \begin{align} \frac{dx}{dt} &= \alpha x…
May 27, 2020
A few weeks ago, I was invited to talk about Star Wars math, on May the Fourth on Oakland Mills Online. For this, I did a quick presentation on the line by…
May 18, 2020
One of the biggest problems facing the world right now is managing compliance with stay-at-home orders. In brief, we know there are people who are opening businesses, terrorizing government officials, and just…
May 12, 2020
I am very happy to say Teaching and Learning Mathematics Online ( TLMO ) is now available! This is my fifth book and second this year (well, both this year were edited…
May 1, 2020
Yesterday, the Charter Review Commission presented its final report to the County Council. We had our final meeting Tuesday morning, via video conference, and approved the report with minor changes. You can…
Apr 25, 2020
The most interesting aspect of the Ming Dynasty governance was its support for the lower classes. This was led by the first Ming ruler, Hongwu Emperor, who started the land reforms. Hongwu…
Apr 24, 2020
The COVID-19 pandemic has impacted everyone in unforeseeable ways. From an educational perspective, this pandemic is affecting both learners and teachers as many countries have suspended their in-person classes due to the…
Apr 15, 2020
Back in December, I did a study on Ebolavirus transmission rates in the Democratic Republic of Congo. Nothing special, but the DRC outbreak had been going on for just over a year…
Apr 12, 2020
Singular value decomposition (SVD) is something I found challenging when I took linear algebra as an undergraduate, decades ago. It's complicated. It's hard to calculate. And there's no reason for it, as…
Apr 11, 2020
It's important to remember that when Buddhism entered China, it did not enter a vacuum. Like Japan, China already had widespread philosophical traditions. By the time Buddhism reached China, sometime during the…