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Isochronism

Definitions

  • Webster's Revised Unabridged Dictionary
    • n Isochronism The state or quality of being isochronous.
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Century Dictionary and Cyclopedia
    • n isochronism The character of being isochronous; the property of a pendulum by which it performs its vibrations in equal times.
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Chambers's Twentieth Century Dictionary
    • n Isochronism the quality of being isochronous or done in equal times
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Etymology

Chambers's Twentieth Century Dictionary
Gr. isochronosisos, equal, chronos, time.

Usage

In literature:

In order to produce a note, the succession of shocks must not deviate much from isochronism.
"Scientific American Supplement, No. 401, September 8, 1883" by Various
THE ATTAINMENT OF ISOCHRONISM BY HUYGENS.
"Watch and Clock Escapements" by Anonymous
He also discovered the isochronism of the pendulum.
"The Wit and Humor of America, Volume I. (of X.)" by Various
There was something indescribably grim and bodeful in those isochronal batterings of the solid ground.
"Joan of Arc of the North Woods" by Holman Day
Galileo published his discovery of the isochronous property of the pendulum in 1639.
"Chambers's Edinburgh Journal, No. 457" by Various
By subsequent experiment he verified the law, and the isochronism of the pendulum was discovered.
"The Great Events by Famous Historians, Volume 11" by Various
By subsequent experiment he verified the law, and the isochronism of the pendulum was discovered.
"Pioneers of Science" by Oliver Lodge
Or again by suitable arrangements the bob may be made to move in certain curves so as to be isochronous.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various
He also discovered the isochronism of the pendulum.
"A Guest at the Ludlow and Other Stories" by Edgar Wilson (Bill) Nye
A departure from the law of isochronism may then be expected to develop itself.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3" by Various
He also discovered the isochronism of the pendulum.
"Cordwood" by Edgar Wilson (Bill) Nye
The experimental verification of this fact led him to the important discovery of the isochronism of the pendulum.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4" by Various
Adjusted to isochronism indicates that the watch functions uniformly during the entire twenty-four hours running.
"Rules and Practice for Adjusting Watches" by Walter J. Kleinlein
If the circuits have the same frequency when separated they are said to be isochronous.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 5" by Various
A luminous spot is also sometimes observed isochronous with the pulse.
"Fiends, Ghosts, and Sprites" by John Nettin Radcliffe
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In news:

Thus, teaming is not good for streaming or isochronous media.
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In science:

Dependence of X-ray Luminosity on Isochronal Age & Mass.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Lastly, we find some weak dependence of X-ray luminosity with isochronal age and mass, qualitatively consistent with dependence on surface area and effective temperature, from which the values of age and mass are determined.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
The X-ray luminosity tends to decrease slightly if at all with isochronal age and to increase with mass.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
This may reflect the dependence of isochronal age on stellar surface area.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Isochronal Age and Mass are determined by interpolation from the Baraffe (1998) tracks.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Age of ∼0.2 indicates the source is very young but on edge of isochrone grid.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Isochronal Age and Mass are determined by interpolation from the Baraffe (1998) tracks.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Age of ∼0.2 indicates the source is very young but on edge of isochrone grid.
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
Fig. 13.— The graphs on the left show the stellar isochronal age calculated from Baraffe (1998), plotted against the stellar X-ray luminosity, LX, for Serpens (above) and NGC 1333 (below).
The Properties of X-ray Luminous Young Stellar Objects in the NGC 1333 and Serpens Embedded Clusters
However, such systems enable a unique test of the joint accuracy of evolutionary and atmospheric models, under the constraint of coevality for the individual components (the “isochrone test”).
Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
Under the conservative assumption of coevality, we can use 2MASS J1209−1004AB to test current theoretical models of brown dwarfs, by assessing whether the two components lie along a single isochrone on the Hertzsprung-Russell (H-R) diagram.
Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
One limitation on the isochrone test is that the currently available evolutionary models do not typically incorporate the same set of model atmospheres used in fitting observed spectra.
Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
The isochrone test described here is conceptually identical to some previous studies of young star-forming regions.
Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
We now sub ject 2MASS J1209−1004AB to the isochrone test. A parallax measurement is not available, so we use the photometric distance estimate (§ 3.5) — this is not a limiting factor in the analysis.
Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
We also apply the isochrone test to the ǫ Ind Bab system, which is a wide (1459 AU) separation binary companion to the K5 V star ǫ IndA (Scholz et al. 2003).
Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
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