Claudius Ptolemy was a Greek mathematician, astronomer and geographer who lived in the Egyptian city of Alexandria while under the rule of the Roman Empire. Much of medieval astronomy and ...

IT is somewhat strange that in the article on Ptolemy in the “Penny Cyclopædia,” he is spoken of only as a geographer. His fame is undoubtedly built upon his two great works on astronomy and ...

Stem and leaf diagrams make it easier to read lists of number Stem and leaf diagrams are formed by splitting the number into two parts, the ‘stem’ and the ‘leaf. For example: In the number ...

These drawings, which first appeared in the journal Advances in Protein Chemistry in 1981, became known as ribbon diagrams. Richardson’s drawing style was quickly adopted. Structural biologists ...

While we wouldn’t want to document a computer motherboard with ASCII schematics, it’s great for a quick-and-dirty circuit diagrams. Not exactly schematics, but [Duckman] has some Arduino ...

The operating logic may be diagrammed to different levels of completeness of information. Whatever the level of completeness, the diagram communicates functional information explicitly to the degree ...

Ågren, J. Hayes, F. H. Höglund, L. Kattner, U. R. Legendre, B. and Schmid-Fetzer, R. 2002. Applications of Computational Thermodynamics. Zeitschrift für ...

Tools and Algorithms for the Construction and Analysis of Systems. Vol. 14571, Issue. , p. 279. String diagrams are powerful graphical methods for reasoning in elementary category theory. Written in ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond ...

Topics to consider include: historical astronomers—such as Nicolaus Copernicus, Claudius Ptolemy, and Johannes ... telescopes for display. Include diagrams of antique telescopes for contrast.

Inspired by professor of climate science Ed Hawkins' climate warming stripes, the air quality stripes depict particulate matter (PM) concentrations in 176 cities worldwide since 1850. These tiny ...