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Related Concept Videos

Random Error01:04

Random Error

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Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...
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A random variable is a single numerical value that indicates the outcome of a procedure. The concept of random variables is fundamental to the probability theory and was introduced by a Russian mathematician, Pafnuty Chebyshev, in the mid-nineteenth century.
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The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
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Updated: Feb 15, 2026

Light-driven Enzymatic Decarboxylation
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Light-driven inching random laser.

Nikita Choudhary, Diksha Sharma, Jyoti Mandal

    Optics Letters
    |February 13, 2026
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    Summary
    This summary is machine-generated.

    We developed a light-driven inching random laser that bends and moves remotely under optical illumination. This laser can be guided to specific locations to deliver intense optical signals precisely where needed.

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    Area of Science:

    • Materials Science
    • Optics
    • Robotics

    Background:

    • Random lasers offer unique emission properties.
    • Controlling laser emission location is crucial for applications.
    • Light-induced deformation in materials enables novel actuation.

    Purpose of the Study:

    • To develop a self-propelled random laser capable of remote-controlled motion.
    • To investigate the mechanism of light-driven bending and locomotion.
    • To demonstrate the delivery of localized optical signals using the inching random laser.

    Main Methods:

    • Fabrication of a composite structure combining a liquid crystal elastomer with a random lasing medium.
    • Optical illumination to induce bending deformation and initiate movement.
    • Characterization of the laser's motion on various surfaces.
    • Analysis of the lasing properties, including threshold and spectral behavior.

    Main Results:

    • The composite random laser demonstrated controlled inching motion on flat and blazed grating surfaces.
    • Optical illumination successfully induced bending deformation, enabling remote-controlled locomotion.
    • The random lasing tip exhibited bandwidth collapse and a clear lasing threshold at the target location.
    • Precise optical guidance to a designated target position was achieved.

    Conclusions:

    • A novel light-driven inching random laser was successfully demonstrated.
    • The device offers a unique platform for remote-controlled optical signal delivery.
    • This technology holds promise for applications requiring precise optical localization.