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Related Concept Videos

Elasticity01:12

Elasticity

Elasticity is the ability of an object to withstand the effects of distortion and to return to its original size and shape once the forces causing deformation are removed. When an elastic material deforms under the action of an external force, it experiences internal resistance to the deformation. However, if no external force is applied, it returns to its original state.
The elasticity of an object can be described by a stress-strain curve, which represents the relationship between stress...
Elastin is Responsible for Tissue Elasticity01:12

Elastin is Responsible for Tissue Elasticity

Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
Elasticity in Concrete01:20

Elasticity in Concrete

Upon subjecting concrete to moderate or high uniaxial compressive or tensile stresses, the strain response is non-linear relative to the stress applied. As the stress is removed, the resulting stress-strain curve deviates from the original path traced during loading, creating a hysteresis loop, indicative of the concrete's non-linear and non-elastic properties. Typically, a material's modulus of elasticity, which is a measure of the material's stiffness, is inferred from the linear portion of...
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
Hooke's Law01:26

Hooke's Law

Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.
Equation of the Elastic Curve01:23

Equation of the Elastic Curve

The concept of curvature in plane curves, crucial in structural engineering, defines how sharply a beam bends under load. This curvature is determined using the curve's first and second derivatives.
Consider a cantilever beam with a point load at its free end (for instance, a diving board). When analyzing beam deflection with small slopes, the shape of the beam's elastic curve becomes key. The governing equation for this analysis involves the bending moment and the beam's flexural rigidity,...

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Related Experiment Video

Updated: Jun 4, 2026

Quantifying Elastic Properties of Environmental Biofilms using Optical Coherence Elastography
04:51

Quantifying Elastic Properties of Environmental Biofilms using Optical Coherence Elastography

Published on: March 1, 2024

Visual cues and strategies for perceiving elasticity.

Vivian C Paulun1,2,3, Florian S Bayer3, Joshua Tenenbaum2

  • 1Department of Psychology, University of Wisconsin-Madison, Madison, WI, USA.

Proceedings. Biological Sciences
|June 2, 2026
PubMed
Summary
This summary is machine-generated.

Humans judge object elasticity by switching between efficient visual cues, not by combining them. This resource-rational model explains how the brain infers physical properties for interaction.

Keywords:
computational rationalityintuitive physicsvisual perception

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Last Updated: Jun 4, 2026

Quantifying Elastic Properties of Environmental Biofilms using Optical Coherence Elastography
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Area of Science:

  • Cognitive Science
  • Neuroscience
  • Artificial Intelligence

Background:

  • Visually inferring object properties like elasticity is crucial for interacting with the physical world.
  • This ability remains a challenge for artificial intelligence, indicating complex underlying neural computations.
  • Understanding how the human brain achieves this is key to advancing AI perception.

Purpose of the Study:

  • To propose a resource-rational model explaining human judgment of object elasticity.
  • To investigate the computational strategies the human brain employs for inferring elasticity from motion.
  • To identify specific motion features that correlate with elasticity variations.

Main Methods:

  • Generated 100,000 physics-based simulations of bouncing cubes with varying elasticities.
  • Identified 23 motion features across simulations that capture elasticity variations.
  • Conducted experiments to test human cue utilization in elasticity judgments.

Main Results:

  • Tiny changes in initial conditions produced significantly different object trajectories.
  • A weighted combination of identified motion features reliably predicted physical elasticity.
  • Humans did not combine cues but switched between different, computationally efficient heuristics.

Conclusions:

  • Human elasticity judgment relies on a flexible strategy of switching between informative visual cues.
  • This switching behavior is a form of resource rationality, adapting to available stimulus information.
  • The findings offer insights into human perception and potential AI development for object property inference.