Related Experiment Video
Updated: Oct 13, 2025
09:01
The Double-H Maze: A Robust Behavioral Test for Learning and Memory in Rodents
Published on: July 8, 2015
12.8K
Marginal stability in memory training of jammed solids.
Francesco Arceri1, Eric I Corwin1, Varda F Hagh1,2
1Department of Physics, University of Oregon, Eugene, Oregon 97403, USA.
Physical Review. E
|November 16, 2021
Summary
Jammed solids store memory through cyclic shear, but only if they are marginally stable. Highly stable packings require yielding before memory encoding occurs, primarily within the shear band.
Area of Science:
- Physics of soft and amorphous matter
- Materials science
- Mechanical engineering
Background:
- Cyclic shear is a known method for memory encoding in jammed solids.
- The precise mechanisms linking memory storage to amorphous structure remain unclear.
- The role of structural stability in this memory encoding process needs further investigation.
Purpose of the Study:
- To investigate the influence of amorphous structure stability on memory encoding via cyclic shear.
- To determine the conditions under which jammed solids can reliably store memory.
- To explore the relationship between structural stability, yielding, and memory formation.
Main Methods:
- Studied memory encoding in jammed sphere packings subjected to cyclic shear.
- Compared memory storage in marginally stable versus highly stable amorphous structures.
- Generated highly stable packings by minimizing potential energy (positional and radial degrees of freedom).
Main Results:
- Marginal stability is essential for jammed solids to store memory via cyclic shear.
- Highly stable packings initially exhibit brittle yielding before memory encoding can occur.
- Cyclic shear training in highly stable packings is localized within the shear band, which is found to be marginally stable.
Conclusions:
- Jammed solids require marginal stability to effectively encode memory through cyclic shear.
- The transition from brittle yielding to memory encoding in highly stable packings is linked to the emergence of marginal stability in shear bands.
- Understanding structural stability is key to controlling and utilizing memory effects in jammed materials.
Related Concept Videos
01:13Stability of Equilibrium Configuration: Problem Solving
701
The stability of equilibrium configurations is an important concept in physics, engineering, and other related fields. In simple terms, it refers to the tendency of an object or system to return to its equilibrium position after being disturbed. The stability of an equilibrium configuration can be analyzed by considering the potential energy function of the system and examining its behavior near the equilibrium point.
Problem-solving in the context of the stability of equilibrium configuration...
Problem-solving in the context of the stability of equilibrium configuration...
701
01:23Stability of Equilibrium Configuration
565
Understanding the stability of equilibrium configurations is a fundamental part of mechanical engineering. In any system, there are three distinct types of equilibrium: stable, neutral, and unstable.
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
A stable equilibrium occurs when a system tends to return to its original position when given a small displacement, and the potential energy is at its minimum. An example of a stable equilibrium is when a cantilever beam is fixed at one end and a weight is attached to the other end. If the weight...
565
01:21Rigid Body Equilibrium Problems - II
7.5K
A rigid body is in static equilibrium when the net force and the net torque acting on the system are equal to zero.
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?
Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?
7.5K
01:14Stability of structures
272
In mechanical engineering, the stability of systems under various forces is critical for designing durable and efficient structures. One fundamental way to explore these concepts is by analyzing systems like two rods connected at a pivot point, O, with a torsional spring of spring constant k at the pivot point. This system is similar in appearance to a scissor jack used to change tires on a car. In this case, the arms of the linkage (equivalent to the rods in this system) are entirely vertical,...
272
00:49Rigid Body Equilibrium Problems - I
4.9K
A rigid body is said to be in static equilibrium when the net force and the net torque acting on the system is equal to zero. To solve for rigid body equilibrium problems, do the following steps.
4.9K
01:24Pole and System Stability
489
The transfer function is a fundamental concept representing the ratio of two polynomials. The numerator and denominator encapsulate the system's dynamics. The zeros and poles of this transfer function are critical in determining the system's behavior and stability.
Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's...
Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's...
489