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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/20140731/ebolatimelinedeadliestoutbreak/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
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
Posted in Education, Life, Science and Scientists
Tagged bomb, chemistry, Education, explosion, explosive, picric acid, school, science
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Spiraling Stars
Posted in Mathematics
Tagged Art, geometric, geometrical, mathematical, spiral, spiraling, star
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Polyhedral Butterfly
Created using Stella 4d, available at http://www.software3d.com/Stella.php.
Posted in Art
Tagged Art, butterfly, geometric, geometrical, mathematical, polyhedra, polyhedral, polyhedron
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Tessellation Featuring Squares, Regular Hexagons and Dodecagons, and Thirty Degree Rhombi
Posted in Mathematics
Tagged dodecagon, geometry, hexagon, Mathematics, rhombi, rhombus, square, tessellation
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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
Posted in Mathematics
Tagged bifrustrum, discovery, geometry, Mathematics, pentagonal, polyhedra, polyhedral, polyhedron, rediscovery, triamond
1 Comment
Infinite Families of Polyhedra
Many polyhedra appear in finite sets. The most wellknown example of such a set is the five Platonic solids. Many know them from roleplaying games. Other finite sets include the thirteen Archimedean, four KeplerPoinsot, thirteen Catalan, and 92 Johnson solids, … Continue reading
Posted in Mathematics
Tagged antiprism, dipramid, family, geometry, group, infinite, infinity, Mathematics, polyhedra, polyhedron, prism, pyramid, set, trapezohedra, trapezohedron
6 Comments