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see equilibriumequilibrium,
state of balance. When a body or a system is in equilibrium, there is no net tendency to change. In mechanics, equilibrium has to do with the forces acting on a body.
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of a vessel, the ability of a vessel to withstand the external forces that cause it to roll or pitch and to return to the original equilibrium position after these forces have ceased to operate. Stability is one of the most important seakeeping qualities of a vessel. Resistance to rolling is called transverse stability, and resistance to pitching is called longitudinal stability. Because of the elongated shape of a vessel, its longitudinal stability is significantly greater than its transverse stability. Hence assurance of proper transverse stability for safety at sea is a more important design consideration.

A distinction is made between static stability and dynamic stability. Static stability is measured in terms of the righting moment that is developed when a vessel is tilted to a certain angle of heel or trim, and the dynamic stability is measured in terms of the work of this moment. For small angles of heel the righting moment is approximately proportional to the angle of heel, the displacement, and the metacentric height.

Under operating conditions, the transverse stability is checked by determining the metacentric height and comparing it with the value that is safe for the particular vessel. Standards for transverse stability are set by the classification societies.



The property of a chemical compound which is not readily decomposed and does not react with other compounds.
(control systems)
The property of a system for which any bounded input signal results in a bounded output signal.
The property of a body, as an aircraft, rocket, or ship, to maintain its attitude or to resist displacement, and, if displaced, to develop forces and moments tending to restore the original condition.
(fluid mechanics)
The resistance to overturning or mixing in the water column, resulting from the presence of a positive (increasing downward) density gradient.
The resistance of a structure, spoil heap, or clay bank to sliding, overturning, or collapsing.
Chemical durability, resistance to weathering.
Of a fuel, the capability to retain its characteristics in an adverse environment, for example, extreme temperature.
Stability theory of systems of differential equations deals with those solution functions possessing some particular property that still maintain the property after a perturbation.
The property of a system which does not undergo any change without the application of an external agency.
The property of a system in which any departure from an equilibrium state gives rise to forces or influences which tend to return the system to equilibrium. Also known as static stability.
(plasma physics)
The property of a plasma which maintains its shape against externally applied forces (usually pressure of magnetic fields) and whose constituents can pass through confining fields only by diffusion of individual particles.


The resistance of a structure or element thereof to withstand sliding, overturning, buckling, or collapsing.


stabilityclick for a larger image
stabilityclick for a larger image
Atmospheric stability.
i. The ability of an aircraft to return to the same particular condition of flight after having been disturbed from that condition, without any effort on the part of the pilot. The illustration indicates how a stable aircraft returns to its level flight attitude once it is disturbed for any reason.
ii. A state of atmosphere in which the vertical distribution of temperature is such that a parcel of air will resist displacement from its initial level.


1. the ability of an aircraft to resume its original flight path after inadvertent displacement
2. Meteorol
a. the condition of an air or water mass characterized by no upward movement
b. the degree of susceptibility of an air mass to disturbance by convection currents
3. Ecology the ability of an ecosystem to resist change
4. Electrical engineering the ability of an electrical circuit to cope with changes in the operational conditions
5. a vow taken by every Benedictine monk attaching him perpetually to the monastery where he is professed
References in periodicals archive ?
Based on the data from this study, we know with a level of confidence that if a sign language interpreting student, or an interpreter, has good general mental ability, and rates highly on self-esteem, conscientiousness, emotional stability and openness, they are in a strong position to succeed in this profession.
Specifically, this study expects to replicate findings that the more autonomous types of behavioural regulation (Intrinsic, Identified) are associated with higher Extraversion, Conscientiousness and Openness, while the more controlled types of regulation (External) are associated with lower Emotional Stability.
Commanders can assess a unit member's emotional stability by verifying their past history, as legally appropriate, for administrative or judicial punishment, alcohol or drug abuse, misuse of credit, and/or illicit sexual relationships.
Subscale External Validation Correlation Scores Subscale Correlation Scale Score Emotional stability Goldberg Emotional Stability 0.
The same pattern of results is found for emotional stability with the exception of the United States where emotional stability was related to customer service in both peak and non-peak times.
The personality factors openness to experience and emotional stability will manifest themselves in relationship and system maintenance work environment preferences, and through their influence on such preferences will affect job performance and commitment.
For example, studies have shown that emotional stability has a correlation with turnover between 0.
The information profession personality inventory consisted of 101 questions measuring 13 scales: adaptability, assertiveness, autonomy conscientiousness, customer service, emotional stability, extraversion, openness, optimism, teamwork, tough-mindedness, visionary work style, and work drive.
Self-knowledge and your own emotional stability are important and an ability to know when to refer a patient to a general practitioner.
Grief, and its rude upheaval of social and emotional stability, are the real subjects of The Sweet Hereafter.
Douglas doesn't trust that most of us have the self-control, moral development and emotional stability needed to safely own and use guns.
Frequently, observations of behavior and emotional stability conducted across educational, social, and work settings are used to assess personality and interests (Kanchier, 1990).