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Related Concept Videos

Elasticity01:12

Elasticity

3.5K
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...
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Strain-Energy Density01:20

Strain-Energy Density

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Understanding the strain energy density in materials under axial load is crucial for evaluating their mechanical behavior and durability. When a rod is subjected to such a load, it elongates and stores energy, known as strain energy, as potential energy within the material. This energy is measured in terms of energy per unit volume.
In the elastic region of a material, the relationship between the stress and the strain is linear and follows Hooke's Law. The strain energy density in this...
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Elastin is Responsible for Tissue Elasticity01:12

Elastin is Responsible for Tissue Elasticity

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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...
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Hooke's Law01:26

Hooke's Law

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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.
378
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

263
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.
263
Strain and Elastic Modulus01:15

Strain and Elastic Modulus

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The quantity that describes the deformation of a body under stress is known as strain. Strain is given as a fractional change in either length, volume, or geometry under tensile, volume (also known as bulk), or shear stress, respectively, and is a dimensionless quantity. The strain experienced by a body under tensile or compressive stress is called tensile or compressive strain, respectively. In contrast, the strain experienced under bulk stress and shear stress is known as volume and shear...
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Fibroblast Derived Human Engineered Connective Tissue for Screening Applications
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Elasticity, Rigidity, and Resilience in Occupational Contexts.

Stephen J Guastello1

  • 1Marquette University, Milwaukee, WI.

Nonlinear Dynamics, Psychology, and Life Sciences
|June 16, 2024
PubMed
Summary

High workload impacts performance, but elasticity-rigidity variables buffer effects. Team resilience involves coordination, communication, and backup behaviors, leading to chaotic hysteresis in performance.

Area of Science:

  • Occupational Psychology
  • Cognitive Science
  • Team Dynamics

Background:

  • Unusual workloads significantly impact individual and team performance in occupational settings.
  • The cusp catastrophe model offers a framework for understanding cognitive workload and performance.
  • Elasticity-rigidity variables are critical bifurcation factors in performance under stress.

Purpose of the Study:

  • To review empirical research on the cusp catastrophe model and workload.
  • To identify sources of elasticity-rigidity variables influencing performance.
  • To examine the dynamics of team resilience and its impact on performance.

Main Methods:

  • Review of empirical research on the cusp catastrophe model.
  • Identification and analysis of elasticity-rigidity variables (affect, coping strategies, personality, intelligence, task flexibility).

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  • Nonlinear time series analyses of team performance and self-efficacy during challenging events.

    • Main Results:

    • Elasticity-rigidity variables, derived from five sources, act as bifurcation variables.
    • Team resilience requires coordination, communication, and backup behaviors.
    • Team self-efficacy exhibits chaotic variation, and team performance shows chaotic hysteresis.

    Conclusions:

    • Elasticity-rigidity dynamics are crucial for understanding performance under high workload.
    • Team resilience mechanisms contribute to complex performance patterns.
    • Chaotic hysteresis in team performance results from the interplay of individual and team dynamics.