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Related Concept Videos

Group Polarization01:01

Group Polarization

Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
Encoding01:19

Encoding

Information enters the brain through encoding, which is the input of information into the memory system. Once sensory information is received from the environment, the brain labels or codes it. The information is then organized with similar information and connected to existing concepts. Encoding occurs through automatic processing and effortful processing.
Automatic processing involves the encoding of details like time, space, frequency, and the meaning of words, usually done without conscious...
Quadratic Equations in the Complex Number System01:29

Quadratic Equations in the Complex Number System

A quadratic equation in the form ax2+bx+c=0 can have solutions that vary in nature depending on the value of the discriminant, b2−4ac. In this expression, a is the coefficient of the quadratic term x2, b is the coefficient of the linear term x, and c is the constant term. When the discriminant is negative, the equation has no real number solutions. However, by introducing complex numbers through the imaginary unit i, defined by i=-1, these equations can still be solved.The square root of a...
Associative Learning01:27

Associative Learning

Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
Classical conditioning, also known...
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...

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Related Experiment Video

Updated: Jun 20, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Optical implementation of a quadratic associative memory by using the polarization-encoding process.

S H Song, S C Park, S S Lee

    Optics Letters
    |September 23, 2009
    PubMed
    Summary

    This study demonstrates holographic quadratic associative memory using polarization encoding. This method successfully retrieves stored data from incomplete inputs, showcasing its potential for advanced neural network applications.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    Published on: February 6, 2014

    Area of Science:

    • Neuroscience
    • Optical Engineering
    • Computer Science

    Background:

    • Associative memory models are crucial for understanding neural networks.
    • Higher-order associative memories offer enhanced pattern recognition capabilities.
    • Holographic implementation provides a pathway for compact and efficient optical computing.

    Purpose of the Study:

    • To implement a holographic quadratic associative memory.
    • To utilize polarization encoding for representing tensor signs.
    • To demonstrate data retrieval from incomplete inputs.

    Main Methods:

    • Developed a holographic quadratic associative memory system.
    • Employed polarization encoding via twisted nematic liquid-crystal light modulators.
    • Conducted experiments to retrieve stored objects from partial data.

    Main Results:

    • Successfully implemented holographic quadratic associative memory.
    • Demonstrated the effectiveness of polarization encoding for sign representation.
    • Achieved accurate retrieval of stored objects from incomplete inputs.

    Conclusions:

    • Polarization encoding is a viable method for holographic quadratic associative memory.
    • The implemented system shows promise for advanced neural network applications.
    • Holographic associative memory offers efficient data retrieval capabilities.