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The secular variation of a time series is its long-term, non-periodic variation (see Decomposition of time series).Whether a variation is perceived as secular or not depends on the available timescale: a variation that is secular over a timescale of centuries may be a segment of what is, over a timescale of millions of years, a periodic variation.
Port with the disembarkation of Cleopatra in Tarsus (1642), by Claude Lorrain, Musée du Louvre, Paris. Light in painting fulfills several objectives like, both plastic and aesthetic: on the one hand, it is a fundamental factor in the technical representation of the work, since its presence determines the vision of the projected image, as it affects certain values such as color, texture and ...
Geomagnetic secular variation refers to changes in the Earth's magnetic field on time scales of about a year or more. These changes mostly reflect changes in the Earth's interior , while more rapid changes mostly originate in the ionosphere or magnetosphere .
Most domestic buildings of the Romanesque period were built of wood, or partly of wood. In Scandinavian countries, buildings were often entirely of wood, while in other parts of Europe, buildings were "half-timbered", constructed with timber frames, the spaces filled with rubble, wattle and daub, or other materials which were then plastered over. [10]
Most Insular art originates from the Irish monastic movement of Celtic Christianity, or metalwork for the secular elite, and the period begins around 600 with the combining of Celtic and Anglo-Saxon styles. One major distinctive feature is interlace decoration, in particular the interlace decoration as found at Sutton Hoo, in East Anglia.
14th-century Islamic ornament in ivory, centred on a palmette; Alois Riegl's Stilfragen (1893) traced the evolution and transmission of such motifs.. Classical art criticism and the relatively few medieval writings on aesthetics did not greatly develop a concept of style in art, or analysis of it, [12] and though Renaissance and Baroque writers on art are greatly concerned with what we would ...
Other terms often used for art of various religions are cult image, usually for the main image in a place of worship, icon in its more general sense (not restricted to Eastern Orthodox images), and "devotional image" usually meaning a smaller image for private prayer or worship. Images can often be divided into "iconic images", just showing one ...
Secularity, also the secular or secularness (from Latin saeculum, ' worldly ' or ' of a generation '), is the state of being unrelated or neutral in regards to religion. The origins of secularity can be traced to the Bible itself. The concept was fleshed out through Christian history into the modern era. [1] In the Middle Ages, there were even ...