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Encyclopedia > Parallel processing

Parallel processing is the ability of the brain to simultaneously process incoming stimuli. This becomes most important in vision, as the brain divides and conquers what it sees. It breaks up a scene into four components: color, motion, form, and depth. These are individually analysed and then compared to stored memories, which helps the brain identify what you are viewing. The brain then combines all of these into one image that you see and comprehend. This is a continual and seamless operation. In animals, the brain, or encephalon (Greek for in the head), is the control center of the central nervous system. ... Look up vision in Wiktionary, the free dictionary. ... Color is an important part of the visual arts. ... Motion involves change in position, such as this perspective of rapidly leaving Yongsan Station In physics, motion means a continuous change in the position of a body relative to a reference point, as measured by a particular observer in a particular frame of reference. ... Look up form in Wiktionary, the free dictionary. ... Distance is a numerical description of how far apart things lie. ... In psychology, memory is the ability of an organism to store, retain, and subsequently recall information. ...


This is one of the reasons that the human brain is much more powerful than the computer. While the computer's speed is a million times faster than a human's neural network, it is the fact that we have a large number of processors compared to computers. As Donald Hoffman said (1998, p.xiii) "You can buy a chess machine that beats a master but can't yet buy a vision machine that beats a toddler's vision." The technology known as computer vision, however, allows computers to recognize objects visually. A sketch of the human brain by artist Priyan Weerappuli, imposed upon the profile of Michaelangelos David. ... A Lego RCX Computer is an example of an embedded computer used to control mechanical devices. ... Simplified view of an artificial neural network A neural network is a system of interconnecting neurons in a network working together to produce an output function. ... CPU redirects here. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...


References

  • Myers, David G. Psychology. 6th ed. New York: Worth, 2001.
  • Parallel Processing via MPI & OpenMP, M. Firuziaan, O. Nommensen. Linux Enterprise, 10/2002

[[Media:[[Karamullah Baloch]]]]


  Results from FactBites:
 
Parallel computing - Wikipedia, the free encyclopedia (1403 words)
Parallel computing is the simultaneous execution of the same task (split up and specially adapted) on multiple processors in order to obtain results faster.
Parallel processor machines are also divided into symmetric and asymmetric multiprocessors, depending on whether all the processors are the same or not (for instance if only one is capable of running the operating system code and others are less privileged).
Parallel programming is the design, implementation, and tuning of parallel computer programs which take advantage of parallel computing systems.
Oracle Parallel Processing: Chapter 1: Introduction (5603 words)
Parallel computers are used to perform these computations in a timely manner so a weather forecast can be generated early enough for it to be useful.
Parallel processing is useful for only those applications that can break larger tasks into smaller parallel tasks and that can manage the synchronization between those tasks.
Parallel execution entails a cost in terms of the processing overhead necessary to break up a task into pieces, manage the execution of each of those pieces, and combine the results when the execution is complete.
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