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The Picture Exchange Communication System (PECS) is an augmentative and alternative communication system developed and produced by Pyramid Educational Consultants, Inc. [1] PECS was developed in 1985 at the Delaware Autism Program by Andy Bondy, PhD, and Lori Frost, MS, CCC-SLP. [2] The developers of PECS noticed that traditional communication ...
Printable version; In other projects ... the average end-to-end distance can be obtained as ... Kuhn length equals two times the persistence length. [6] References
Pecs may refer to: Pécs, a city in Hungary Pécsi MFC, a football club in the Hungarian city; The pectoralis major, a major human muscle; PECS, the Picture Exchange Communication System, a means of communication for children on the autism spectrum; PECS, Plan for European Cooperating State, European Space Agency enlargement charters
This is known as the Talbot-Plateau law. [2] Like all psychophysical thresholds , the flicker fusion threshold is a statistical rather than an absolute quantity. There is a range of frequencies within which flicker sometimes will be seen and sometimes will not be seen, and the threshold is the frequency at which flicker is detected on 50% of ...
Persistence of vision is the optical illusion that occurs when the visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye. [1] The illusion has also been described as "retinal persistence", [2] "persistence of impressions", [3] simply "persistence" and other variations ...
An adapted version of the standard horse and jockey thaumatrope could thus first show the jockey on the horse before being thrown over its head. [6] In a new 1833 edition of the book this example was replaced with a version without a ring but with an elastic string added to change the axis by pulling it.
A 1-interleaving between two -indexed persistence modules M and N, represented as a diagram of vector spaces and linear maps between them.. In topological data analysis, the interleaving distance is a measure of similarity between persistence modules, a common object of study in topological data analysis and persistent homology.
Colour distribution of a Newton disk. The Newton disk, also known as the disappearing color disk, is a well-known physics experiment with a rotating disk with segments in different colors (usually Newton's primary colors: red, orange, yellow, green, blue, indigo, and violet, commonly known by the abbreviation ROYGBIV) appearing as white (or off-white or grey) when it's spun rapidly about its axis.