Rigidity

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rigidity

[ri′jid·əd·ē]
(astrophysics)
The ratio of the momentum of a cosmic-ray particle to its electric charge, in units of the electron charge.
(mechanics)
The quality or state of resisting change in form.

Rigidity

 

the capability of a body or structure to resist deformation; a physicogeometric characteristic of the cross section of a structural element. In the case of simple deformations within the limits of Hooke’s law, rigidity is determined numerically as the product of the modulus of elasticity E (on elongation-contraction and on flexure) or G (on shear and torsion) and some geometric characteristic of the element cross section:EF on elongation-compression, El on flexure, GF on shear, and so on, where F is the cross section area, and I is the axial moment of inertia. The concept of rigidity is being widely used in the solution of problems concerning the strength of materials.


Rigidity

 

in physiology, a functional state of the skeletal muscles, characterized by a marked increase in their tone and in their resistance to deformation. Muscle rigidity results from changes in the character of the neural influences that the central and peripheral nervous systems continuously exert to the muscles. An example of rigidity is decerebrate rigidity.

In man, injuries and disturbances of the central nervous system and pathological irritation of the peripheral nerves give rise to various manifestations of muscle rigidity. Thus, poisoning by certain toxins, diseases of the nervous system, and hypnosis may cause a state of plastic tone, characterized by a waxlike condition of the muscles. In this state the extremities may easily be placed in any position and can remain thus, unchanged, for a prolonged period. Plastic tone characterizes a state of the nervous system called catalepsy, or plastic rigidity.

rigidity

That property of a material which resists a change in its physical shape.

rigidity

i. The resistance offered by a body when under load. It is the ratio of the stress to the strain. Also known as stiffness
ii. A property of a gyroscope by which its axis will remain in a fixed direction in space unless the rotor is acted upon by an external torque.
References in periodicals archive ?
This is because they are not ready in terms of competence and mental set to adjust to these changes.
The mental set reconfiguration between numbers and photisms in synaesthesia was similar to the real mental set reconfiguration in control group 2 in several factors, such as general mean RT, cost magnitude and cost reduction with RSI.
However, the mental set reconfiguration was similar for both groups.
The RSI effect in the magnitude of the switch cost and the significant residual cost confirm the existence of the usual endogenous and exogenous components in mental set reconfiguration between tasks and also between MP and MT.
Stage 3: Analyzing which mental sets students lack for the construction of a more scientific view of the concept.
It provides an opportunity for the students to apply the mental sets they have acquired to a new situation in order to ensure a successful conceptual change.
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Professor Burke analytically discusses the nature of change and how organizational change is initiated by changing behavior, but not (as is commonly supposed) changes in mental sets or attributes.
The scientists from the Institute of Neurology in London, who reported their findings in the journal Nature Neuroscience, said "successful" jokes involved a "cognitive juxtaposition" of mental sets followed by an "affective feeling of amusement".
These stages encompass everything that happens on planet earth, from the mental sets that determine how we interpret our experiences to the technological advancements that define cultural epochs.
For example, group items or concepts in mental sets.

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