mirror-image method
41Neo-Platonism — Eyjólfur K.Emilsson GENERAL INTRODUCTION Neo Platonism is usually defined as the philosophy of Plotinus, who lived in the third century AD, and his followers in the pagan Graeco Roman world in late antiquity. The most significant philosophers… …
42calligraphy — calligrapher, calligraphist, n. calligraphic /kal i graf ik/, calligraphical, adj. calligraphically, adv. /keuh lig reuh fee/, n. 1. fancy penmanship, esp. highly decorative handwriting, as with a great many flourishes: She appreciated the… …
43Superheterodyne receiver — A 5 tube superheterodyne receiver made in Japan around 1955 In electronics, a superheterodyne receiver (sometimes shortened to superhet) uses frequency mixing or heterodyning to convert a received signal to a fixed intermediate frequency, which… …
44Duplicating machines — were the predecessors of modern document reproduction technology. They have now been replaced by digital duplicators, scanners, laser printers and photocopiers, but for many years they were the primary means of reproducing documents for limited… …
45Offer and acceptance — Contract law Part o …
46Albert Abraham Michelson — Infobox Scientist name = Albert Abraham Michelson caption = Albert Abraham Michelson birth date = birth date|1852|12|19|mf=y birth place = Strzelno, Kingdom of Prussia death date = death date and age|1931|5|9|1852|12|19 death place = Pasadena,… …
47Structuralism (french) and after — French structuralism and after De Saussure, Lévi Strauss, Barthes, Lacan, Foucault Hugh J.Silverman FERDINAND DE SAUSSURE The history of structuralism cannot be thought without Ferdinand de Saussure (1857– 1913). The Swiss linguist lecturing in… …
48Penrose tiling — A Penrose tiling is a nonperiodic tiling generated by an aperiodic set of prototiles named after Roger Penrose, who investigated these sets in the 1970s.Because all tilings obtained with the Penrose tiles are non periodic, Penrose tilings are… …
49Euclidean geometry — A Greek mathematician performing a geometric construction with a compass, from The School of Athens by Raphael. Euclidean geometry is a mathematical system attributed to the Alexandrian Greek mathematician Euclid, which he described in his… …
50Stairway — Stairs redirects here. For other uses, see Stairs (disambiguation). Staircase redirects here. For other uses, see Staircase (disambiguation). This article is about the construction. For the song by Led Zeppelin, see Stairway to Heaven. Stairways… …
