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Schroeder Stairs
Schroeder stairs (Schröder's stairs) is an optical illusion which is a two-dimensional drawing which may be perceived either as a drawing of a staircase leading from left to right downwards or the same staircase only turned upside down, a classical example of perspective reversal in psychology of perception. It is named after the German natural scientist Heinrich G. F. Schröder, who published it in 1858.Alwyn Scott, ''Stairway to the Mind: The Controversial New Science of Consciousness''p. 95/ref> It is sometimes called "Schouten steps", in reference to a small sheet-metal staircase given to M. C. Escher by Prof. Schouten and which was an inspiration for Escher's '' Convex and Concave''. This illusion is also seen in another Escher's work, '' Relativity''. Barile, Margherita. Schroeder Stairs', from Eric W. Weisstein's MathWorld This drawing may be variously described as an "ambiguous figure", "reversible figure Ambiguous images or reversible figures are visual forms th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Illusion
In visual perception, an optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual perception, percept that arguably appears to differ from reality. Illusions come in a wide variety; their categorization is difficult because the underlying cause is often not clear but a classification proposed by Richard Gregory is useful as an orientation. According to that, there are three main classes: physical, physiological, and cognitive illusions, and in each class there are four kinds: Ambiguities, distortions, paradoxes, and fictions. A classical example for a physical distortion would be the apparent bending of a stick half immersed in water; an example for a physiological paradox is the motion aftereffect (where, despite movement, position remains unchanged). An example for a physiological fiction is an afterimage. Three typical cognitive distortions are the Ponzo illusion, Ponzo, Poggendorff illusion, Poggendorff, and M� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perspective Reversal
Perspective may refer to: Vision and mathematics * Perspectivity, the formation of an image in a picture plane of a scene viewed from a fixed point, and its modeling in geometry ** Perspective (graphical), representing the effects of visual perspective in graphic arts ** Aerial perspective, the effect the atmosphere has on the appearance of an object as it is viewed from a distance ** Perspective distortion (photography), the way that viewing a picture from the wrong position gives a perceived distortion ** Perspective (geometry), a relation between geometric figures ** Vue d'optique or perspective view, a genre of etching popular during the second half of the 18th century and into the 19th. Film and television * Perspective (film series), ''Perspective'' (film series), a 2012–2020 Canadian film series by B. P. Paquette * Perspective (2019 film), ''Perspective'' (2019 film), an American adult romance drama * Perspectives (TV series), ''Perspectives'' (TV series), a 2011–2016 B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natural Scientist
Natural science or empirical science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and reproducibility of findings are used to try to ensure the validity of scientific advances. Natural science can be divided into two main branches: life science and physical science. Life science is alternatively known as biology. Physical science is subdivided into branches: physics, astronomy, Earth science and chemistry. These branches of natural science may be further divided into more specialized branches (also known as fields). As empirical sciences, natural sciences use tools from the formal sciences, such as mathematics and logic, converting information about nature into measurements that can be explained as clear statements of the " laws of nature". Modern natural science succeeded more classical approaches to natural ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heinrich G
Heinrich may refer to: People * Heinrich (given name), a given name (including a list of people with the name) * Heinrich (surname), a surname (including a list of people with the name) *Hetty (given name), a given name (including a list of people with the name) Places * Heinrich (crater), a lunar crater * Heinrich-Hertz-Turm, a telecommunication tower and landmark of Hamburg, Germany Other uses * Heinrich event, a climatic event during the last ice age * Heinrich (card game), a north German card game * Heinrich (farmer), participant in the German TV show a ''Farmer Wants a Wife'' * Heinrich Greif Prize, an award of the former East German government * Heinrich Heine Prize, the name of two different awards * Heinrich Mann Prize, a literary award given by the Berlin Academy of Art * Heinrich Tessenow Medal, an architecture prize established in 1963 * Heinrich Wieland Prize, an annual award in the fields of chemistry, biochemistry and physiology * Heinrich, known as Haida in Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Convex And Concave
''Convex and Concave'' is a lithograph print by the Dutch artist M. C. Escher, first printed in March 1955.Locher, J.L. (2000). ''The Magic of M. C. Escher''. Harry N. Abrams, Inc. It depicts an ornate architectural structure with many stairs, pillars and other shapes. The relative aspects of the objects in the image are distorted in such a way that many of the structure's features can be seen as both convex shapes and concave impressions. This is a very good example of Escher's mastery in creating illusions of "impossible architecture." The window A window is an opening in a wall, door, roof, or vehicle that allows the exchange of light and may also allow the passage of sound and sometimes air. Modern windows are usually glazed or covered in some other transparent or translucent ma ...s, roads, stairs and other shapes can be perceived as opening out in seemingly impossible ways and positions. Even the image on the flag is of reversible cubes. One can view these featu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relativity (M
Relativity may refer to: Physics * Galilean relativity, Galileo's conception of relativity * Numerical relativity, a subfield of computational physics that aims to establish numerical solutions to Einstein's field equations in general relativity * Principle of relativity, used in Einstein's theories and derived from Galileo's principle * Theory of relativity, a general treatment that refers to both special relativity and general relativity ** General relativity, Albert Einstein's theory of gravitation ** Special relativity, a theory formulated by Albert Einstein, Henri Poincaré, and Hendrik Lorentz ** '' Relativity: The Special and the General Theory'', a 1920 book by Albert Einstein Social sciences * Linguistic relativity * Cultural relativity * Moral relativity Arts and entertainment Music * Relativity Music Group, a Universal subsidiary record label for releasing film soundtracks * Relativity Records, an American record label * Relativity (band), a Scots-Irish tradit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eric W
The given name Eric, Erich, Erikk, Erik, Erick, Eirik, or Eiríkur is derived from the Old Norse name ''Eiríkr'' (or ''Eríkr'' in Old East Norse due to monophthongization). The first element, ''ei-'' may be derived from the older Proto-Norse ''* aina(z)'', meaning "one, alone, unique", ''as in the form'' ''Æ∆inrikr'' explicitly, but it could also be from ''* aiwa(z)'' "everlasting, eternity", as in the Gothic form '' Euric''. The second element ''- ríkr'' stems either from Proto-Germanic ''* ríks'' "king, ruler" (cf. Gothic '' reiks'') or the therefrom derived ''* ríkijaz'' "kingly, powerful, rich, prince"; from the common Proto-Indo-European root * h₃rḗǵs. The name is thus usually taken to mean "sole ruler, autocrat" or "eternal ruler, ever powerful". ''Eric'' used in the sense of a proper noun meaning "one ruler" may be the origin of '' Eriksgata'', and if so it would have meant "one ruler's journey". The tour was the medieval Swedish king's journey, when new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MathWorld
''MathWorld'' is an online mathematics reference work, created and largely written by Eric W. Weisstein. It is sponsored by and licensed to Wolfram Research, Inc. and was partially funded by the National Science Foundation's National Science Digital Library grant to the University of Illinois at Urbana–Champaign. History Eric W. Weisstein, the creator of the site, was a physics and astronomy student who got into the habit of writing notes on his mathematical readings. In 1995 he put his notes online and called it "Eric's Treasure Trove of Mathematics." It contained hundreds of pages/articles, covering a wide range of mathematical topics. The site became popular as an extensive single resource on mathematics on the web. In 1998, he made a contract with CRC Press and the contents of the site were published in print and CD-ROM form, titled ''CRC Concise Encyclopedia of Mathematics''. The free online version became only partially accessible to the public. In 1999 Weisstein we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ambiguous Figure
Ambiguous images or reversible figures are visual forms that create ambiguity by exploiting graphical similarities and other properties of visual system interpretation between two or more distinct image forms. These are famous for inducing the phenomenon of multistable perception. Multistable perception is the occurrence of an image being able to provide multiple, although stable, perceptions. One of the earliest examples of this type is the rabbit–duck illusion, first published in ''Fliegende Blätter'', a German humor magazine. Other classic examples are the Rubin vase, and the " My Wife and My Mother-in-Law" drawing, the latter dating from a German postcard of 1888. Ambiguous images are important to the field of psychology because they are often research tools used in experiments. There is varying evidence on whether ambiguous images can be represented mentally, but a majority of research has theorized that mental images cannot be ambiguous. Identifying and resolving ambi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bistable Figure
Bistable may refer to: * Bistability in physics; something that can rest in two states * Bistable circuit In electronics, flip-flops and latches are circuits that have two stable states that can store state information – a bistable multivibrator. The circuit can be made to change state by signals applied to one or more control inputs and will out ..., also known as a flip-flop or latch See also * {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
