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Related Concept Videos

Applications of Stress01:04

Applications of Stress

470
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
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Psychological Responses to Stress01:20

Psychological Responses to Stress

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Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
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Components of Stress01:23

Components of Stress

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Stress analysis under multiple loading conditions is intricate, necessitating a comprehensive grasp of normal and shearing stresses. Consider a small cube at point O, subjected to stress on all six faces, visible or not. Normal stress components σx, σy, σz act perpendicularly to the x, y, and z axes. Shearing stress components τxy and τxz are exerted on faces perpendicular to these axes.
Interestingly, the hidden cube faces also experience these stresses, equal and...
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Principal Stresses: Problem Solving01:15

Principal Stresses: Problem Solving

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When analyzing two planes intersecting at right angles under the influence of shearing, tensile, and compressive stresses, it is essential to identify principal planes, maximum shearing stress, and principal stresses. To find the principal planes, apply a formula that equates them to twice the shearing stress divided by the difference between tensile and compressive stresses.
366
Physiological Foundation of Stress01:24

Physiological Foundation of Stress

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Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
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Problem Solving on Stress and Strain01:22

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Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
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Related Experiment Video

Updated: Nov 8, 2025

The Social Dimension of Stress: Experimental Manipulations of Social Support and Social Identity in the Trier Social Stress Test
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Stress and imagining future selves: resolve in the hot/cool framework.

Janet Metcalfe1, William James Jacobs2

  • 1Department of Psychology, Columbia University, New York, NY10027jm348@columbia.eduhttps://psychology.columbia.edu/content/janet-metcalfe.

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Summary

The hot/cool framework impacts willpower and episodic memory. Stress negatively affects the cool system, impairing access to future selves and thus reducing resolve.

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Area of Science:

  • Behavioral Economics
  • Cognitive Psychology
  • Neuroscience

Background:

  • The hot/cool framework, often used to explain self-control, is typically associated with suppression.
  • Ainslie's work primarily links this framework to the suppression of impulses.

Purpose of the Study:

  • To explore the broader implications of the hot/cool framework beyond suppression.
  • To investigate the framework's connection to resolve and future self-access.
  • To propose a link between the cool system's integrity and both willpower and episodic memory.

Main Methods:

  • Conceptual analysis of Ainslie's hyperbolic discounting model.
  • Integration of concepts from cognitive psychology regarding episodic memory and self-access.
  • Theoretical prediction of the impact of negative factors on the cool system.

Main Results:

  • The hot/cool framework has significant implications for understanding resolve, not just suppression.
  • Resolve is fundamentally linked to accessing future selves, a function of the cool system.
  • The cool system's functionality is tied to episodic memory.

Conclusions:

  • Factors that impair the cool system, such as stress, are predicted to negatively affect willpower.
  • Impaired cool system function is also predicted to impact episodic memory.
  • This suggests a unified mechanism underlying willpower, episodic memory, and resolve.