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Ames Trapezoid
Ames window The Ames trapezoid or Ames window is an image on, for example, a flat piece of cardboard that seems to be a rectangular window but is, in fact, a trapezoid. Both sides of the piece of cardboard have the same image. The cardboard is hung vertically from a wire so it can rotate around continuously, or is attached to a vertical mechanically rotating axis for continuous rotation. When the rotation of the window is observed, the window appears to rotate through less than 180 degrees, though the exact amount of travel that is perceived varies with the dimensions of the trapezoid. It seems that the rotation stops momentarily and reverses its direction. It is therefore not perceived to be rotating continuously in one direction but instead is misperceived to be oscillating. This phenomenon was discovered by Adelbert Ames, Jr. in 1947. Legacy During the 1960s, the concept of "transactional ambiguity" was studied and promulgated by some psychologists based on the use of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ames Window
Ames window The Ames trapezoid or Ames window is an image on, for example, a flat piece of cardboard that seems to be a rectangular window but is, in fact, a trapezoid. Both sides of the piece of cardboard have the same image. The cardboard is hung vertically from a wire so it can rotate around continuously, or is attached to a vertical mechanically rotating axis for continuous rotation. When the rotation of the window is observed, the window appears to rotate through less than 180 degrees, though the exact amount of travel that is perceived varies with the dimensions of the trapezoid. It seems that the rotation stops momentarily and reverses its direction. It is therefore not perceived to be rotating continuously in one direction but instead is misperceived to be oscillating. This phenomenon was discovered by Adelbert Ames, Jr. in 1947. Legacy During the 1960s, the concept of "transactional ambiguity" was studied and promulgated by some psychologists based on the use of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 material, a sash set in a frame in the opening; the sash and frame are also referred to as a window. Many glazed windows may be opened, to allow ventilation, or closed, to exclude inclement weather. Windows may have a latch or similar mechanism to lock the window shut or to hold it open by various amounts. In addition to this, many modern day windows may have a window screen or mesh, often made of aluminum or fibreglass, to keep bugs out when the window is opened. Types include the eyebrow window, fixed windows, hexagonal windows, single-hung, and double-hung sash windows, horizontal sliding sash windows, casement windows, awning windows, hopper windows, tilt, and slide windows (often door-sized), tilt and turn windows, transom windows, sid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trapezoid
A quadrilateral with at least one pair of parallel sides is called a trapezoid () in American and Canadian English. In British and other forms of English, it is called a trapezium (). A trapezoid is necessarily a Convex polygon, convex quadrilateral in Euclidean geometry. The parallel sides are called the ''bases'' of the trapezoid. The other two sides are called the ''legs'' (or the ''lateral sides'') if they are not parallel; otherwise, the trapezoid is a parallelogram, and there are two pairs of bases). A ''scalene trapezoid'' is a trapezoid with no sides of equal measure, in contrast with the #Special cases, special cases below. Etymology and ''trapezium'' versus ''trapezoid'' Ancient Greek mathematician Euclid defined five types of quadrilateral, of which four had two sets of parallel sides (known in English as square, rectangle, rhombus and rhomboid) and the last did not have two sets of parallel sides – a τραπέζια (''trapezia'' literally "a table", itself fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Degree (angle)
A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane (mathematics), plane angle in which one Turn (geometry), full rotation is 360 degrees. It is not an SI unit—the SI unit of angular measure is the radian—but it is mentioned in the SI Brochure, SI brochure as an Non-SI units mentioned in the SI, accepted unit. Because a full rotation equals 2 radians, one degree is equivalent to radians. History The original motivation for choosing the degree as a unit of rotations and angles is unknown. One theory states that it is related to the fact that 360 is approximately the number of days in a year. Ancient astronomers noticed that the sun, which follows through the ecliptic path over the course of the year, seems to advance in its path by approximately one degree each day. Some ancient calendars, such as the Iranian calendar, Persian calendar and the Babylonian calendar, used 360 days for a year. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adelbert Ames, Jr
Adelbert is a given name of German origin, which means "noble bright" or "noble shining", derived from the words ''adal'' (meaning noble) and ''berht'' (shining or bright). Alternative spellings include Adalbart and Adalberto. Related names include Albert, Delbert, and Elbert. The name Adelbert may refer to: *Adelbert Althouse (1869–1954), American politician *Adelbert Ames (1835–1933), American politician *Adelbert Ames Jr. (1880–1955), American scientist *Adelbert Anson (1840–1909), English-born Canadian clergyman *Adelbert S. Atherton (1850–1920), American politician *Adelbert Bleekman (1846–1908), American politician *Adelbert Brownlow-Cust, 3rd Earl Brownlow (1844–1921), British soldier, courtier and Conservative politician *Adelbert Bryan (fl. 1980s–2000s), U.S. Virgin Islands politician *Adelbert Rinaldo Buffington (1837–1922), United States Army Brigadier General *Adelbert Cronkhite (1861–1937), career United States Army officer * Adelbert Delbrück (1822 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mental Set
In psychology, rigidity or mental rigidity refers to an obstinate inability to yield or a refusal to appreciate another person's viewpoint or emotions characterized by a lack of empathy. It can also refer to the tendency to perseverate, which is the inability to change habits and the inability to modify concepts and attitudes once developed. A specific example of rigidity is functional fixedness, which is a difficulty conceiving new uses for familiar objects. History Rigidity is an ancient part of our human cognition. Systematic research on rigidity can be found tracing back to Gestalt psychologists, going as far back as the late 19th to early 20th century with Max Wertheimer, Wolfgang Köhler, and Kurt Koffka in Germany. With more than 100 years of research on the matter there is some established and clear data. Nonetheless, there is still much controversy surrounding several of the fundamental aspects of rigidity. In the early stages of approaching the idea of rigidity, it is tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ames Room
An Ames room is a distorted room that creates an optical illusion. Likely influenced by the writings of Hermann Helmholtz, it was invented by American scientist Adelbert Ames Jr. in 1946, and constructed in the following year. Usage and effect An Ames room is viewed with one eye through a peephole. Through the peephole, the room appears to be an ordinary rectangular cuboid, with a back wall that is vertical and at right angles to the observer's line of sight, two vertical side walls parallel to each other, and a horizontal floor and ceiling. The observer will see that an adult standing in one corner of the room along the back wall appears to be a giant, while another adult standing in the other corner along the back wall appears to be a dwarf. And if an adult moves from one corner of the room to the other, they will appear to dramatically change in size. Explanation The true shape of the room is that of an irregular hexahedron: depending on the design of the room, all surf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anamorphosis
Anamorphosis is a distorted projection requiring the viewer to occupy a specific vantage point, use special devices, or both to view a recognizable image. It is used in painting, photography, sculpture and installation, toys, and film special effects. The word is derived from the Greek prefix ''ana-'', meaning "back" or "again", and the word ''morphe'', meaning "shape" or "form". Extreme anamorphosis has been used by artists to disguise caricatures, erotic and scatological scenes, and other furtive images from a casual spectator, while revealing an undistorted image to the knowledgeable viewer. Types of projection There are two main types of anamorphosis: ''perspective'' (oblique) and ''mirror'' (catoptric). More complex anamorphoses can be devised using distorted lenses, mirrors, or other optical transformations. An oblique anamorphism forms an affine transformation of the subject. Early examples of Perspective (graphical), perspectival anamorphosis date to the Renaissance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Derek Muller
Derek Alexander Muller (born 9 November 1982) is an Australian-Canadian science communicator, filmmaker, and television personality, who is best known for his YouTube channel Veritasium. Muller has also appeared as a correspondent on the Netflix web series ''Bill Nye Saves the World'' since 2017. Early life and education Muller was born to South African parents in Traralgon, Victoria, Australia, and moved to Vancouver, British Columbia, Canada, when he was 18 months old. In 2000, Muller graduated from West Vancouver Secondary School. In 2004, Muller graduated from Queen's University in Kingston, Ontario, with a Bachelor of Applied Science in Engineering Physics. Muller moved to Australia to study film-making, but instead enrolled for a Ph.D. in physics education research from the University of Sydney, which he completed in 2008 with a thesis: ''Designing Effective Multimedia for Physics Education''. He was still looking for a creative career but did not find a dir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
