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Madame de Meuron, a Swiss eccentric with her characteristic ear trumpet and hat. Saparmurat Niyazov, who ruled as dictator of Turkmenistan from 1991 to 2006, was known for imposing his personal eccentricities upon the country. Eccentricity (also called quirkiness) is an unusual or odd behavior on the part of an individual.
In mathematics, the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape. One can think of the eccentricity as a measure of how much a conic section deviates from being circular. In particular: The eccentricity of a circle is 0. The eccentricity of an ellipse which is not a circle is between 0 and 1.
Eccentricity is contrasted with normal behavior, the nearly universal means by which individuals in society solve given problems and pursue certain priorities in everyday life. People who consistently display benignly eccentric behavior are labeled as "eccentrics".
Eccentric (mechanism), a wheel that rotates on an axle that is displaced from the focus of the circle described by the wheel; Horizontal eccentricity, in vision, degrees of visual angle from the center of the eye; Eccentric contraction, the lengthening of muscle fibers; Eccentric position of a surveying tripod, to be able to measure hidden points
Conic sections of varying eccentricity sharing a focus point and directrix line, including an ellipse (red, e = 1/2), a parabola (green, e = 1), and a hyperbola (blue, e = 2). The conic of eccentricity 0 in this figure is an infinitesimal circle centered at the focus, and the conic of eccentricity ∞ is an infinitesimally separated pair of lines.
Once reserved for athletes, eccentric exercise is becoming increasingly popular in everyday training and physical therapy—especially for people with musculoskeletal conditions like Parkinson’s ...
[4] Eccentricity, however, "emphasizes the idea of divergence from the usual or customary; idiosyncrasy implies a following of one's particular temperament or bent especially in trait, trick, or habit; the former often suggests mental aberration, the latter, strong individuality and independence of action". [4]
The mean eccentricity of an object is the average eccentricity as a result of perturbations over a given time period. Neptune currently has an instant (current epoch ) eccentricity of 0.011 3 , [ 11 ] but from 1800 to 2050 has a mean eccentricity of 0.008 59 .