Monthly Archives: July 2014

A Graph of Infections and Deaths During the First Four Months of the 2014 Ebola Outbreak

Source of data for this graph:  http://www.abc.net.au/news/2014-07-31/ebola-timeline-deadliest-outbreak/5639060. The date I used as “day zero,” March 25, 2014, is the day when the Ministry of Health in Guinea announced an outbreak of ebola was in progress, according to this source: https://en.wikipedia.org/wiki/Ebola_2014. … Continue reading

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The Unintentional Bomb: A True Story

Nineteen years ago, I began my teaching career at a small, private Arkansas high school. One of the classes I taught was Chemistry, and my principal happened to be a former chemistry teacher, himself.  We were both new to the … Continue reading

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Spiraling Stars

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Polyhedral Butterfly

Created using Stella 4d, available at http://www.software3d.com/Stella.php.

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Tessellation Featuring Squares, Regular Hexagons and Dodecagons, and Thirty Degree Rhombi

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My Lost Discovery from ~2006: The Triamond Pentagonal Bifrustrum

I just had the strange experience of encountering a polyhedral discovery of mine on the Internet from about eight years ago — one that I had completely forgotten, but had shared with others, who posted it online, and were kind … Continue reading

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Infinite Families of Polyhedra

Many polyhedra appear in finite sets. The most well-known example of such a set is the five Platonic solids. Many know them from role-playing games. Other finite sets include the thirteen Archimedean, four Kepler-Poinsot, thirteen Catalan, and 92 Johnson solids, … Continue reading

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