River slope connects modern topography with ancient tectonics

Tectonics, topography, and mammalian diversity

Terrestrial vertebrates show striking changes in species richness across topographic gradients. For mammals, nearly twice as many species per unit area occur in topographically complex regions as in adjacent lowlands. The geological context of this pervasive biogeographic pattern suggests that tectonic processes have a first-order impact on regional diversity. I evaluate ecological, evolutionar...

On Greek, Ancient and Modern (but Rather Ancient than Modern)

In this paper a few applications of the current implementation of R are given. These applications concern typesetting problems that cannot be solved by TEX (consequently, by no other typesetting system known to the authors). They cover a wide range, going from calligraphic script fonts (Adobe Poetica), to plain Dutch/Portuguese/Turkish typesetting, to vowelized Arabic, fully diacriticized schol...

Drawing with divergent perspective, ancient and modern.

Before methods for drawing accurately in perspective were developed in the 15th century, many artists drew with divergent perspective. But we found that many university students draw with divergent perspective rather than with the correct convergent perspective. These experiments were designed to reveal why people tend to draw with divergent perspective. University students drew a cube and isol...

Ancient and modern rangefinders

OAKOC is an Army acronym used for planning operations: it stands for Observation and fields of fire, Avenues of approach, Key and decisive terrain, Obstacles, and Cover and concealment. The first point is therefore the Observation and fields of fire. It means that it is necessary to answer the following questions [1]: What can you see throughout your area? What fields of fire will you have in t...

Ancient teachings, modern lessons.