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The symbol of a space group is defined by combining the uppercase letter describing the lattice type with symbols specifying the symmetry elements. The symmetry elements are ordered the same way as in the symbol of corresponding point group (the group that is obtained if one removes all translational components from the space group).
The Wyckoff positions are named after Ralph Wyckoff, an American X-ray crystallographer who authored several books in the field.His 1922 book, The Analytical Expression of the Results of the Theory of Space Groups, [3] contained tables with the positional coordinates, both general and special, permitted by the symmetry elements.
[5] [128] Like Kandinsky, he "found inspiration in Theosophy and the occult, and promoted a subjective-intuitive approach to art." [129] Among the Theosophical sources, Besant and Leadbeater's book Thought-Forms [22] had great influence for him. [130] He interested in the Theosophical theory of colour as well as scientific one. [131]
In works of art, literature, and narrative, a symbol is a concrete element like an object, character, image, situation, or action that suggests or hints at abstract, deeper, or non-literal meanings or ideas. [1] [2] The use of symbols artistically is symbolism. In literature, such as novels, plays, and poems, symbolism goes beyond just the ...
Burke's definition of man states: "Man is the symbol-using (symbol-making, symbol-misusing) animal, inventor of the negative (or moralized by the negative), separated from his natural condition by instruments of his own making, goaded by the spirit of hierarchy (or moved by the sense of order), and rotten with perfection". [2]
Crystallography is the branch of science devoted to the study of molecular and crystalline structure and properties. [1] The word crystallography is derived from the Ancient Greek word κρύσταλλος ( krústallos ; "clear ice, rock-crystal"), and γράφειν ( gráphein ; "to write"). [ 2 ]
The homunculus is commonly used today in scientific disciplines such as psychology as a teaching or memory tool to describe the distorted scale model of a human drawn or sculpted to reflect the relative space human body parts occupy on the somatosensory cortex (the sensory homunculus) and the motor cortex (the motor homunculus).
Cassirer was born in Breslau in Silesia (modern-day southwest Poland), into a Jewish family. After graduating from Johannesgymnasium Breslau he studied Jurisprudence at Friedrich Wilhelms Universität Berlin and Leipzig University, Germanic Philology, Contemporary Literary History, and Philosophy at Ruprecht Karls Universität Heidelberg and Friedrich Wilhelms Universität Berlin, and ...