acceleration

Definitions

  • WordNet 3.6
    • n acceleration the act of accelerating; increasing the speed
    • n acceleration an increase in rate of change "modern science caused an acceleration of cultural change"
    • n acceleration (physics) a rate of increase of velocity
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Webster's Revised Unabridged Dictionary
  • Interesting fact: In only eight minutes, the Space Shuttle can accelerate to a speed of 27,000 kilometres per hour.
    • Acceleration See Priming of the tides, under Priming.
    • n Acceleration The act of accelerating, or the state of being accelerated; increase of motion or action; as, a falling body moves toward the earth with an acceleration of velocity; -- opposed to retardation. "A period of social improvement, or of intellectual advancement, contains within itself a principle of acceleration ."
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Century Dictionary and Cyclopedia
  • Interesting fact: Fleas can accelerate 50 times faster than the space shuttle.
    • n acceleration The act of accelerating, or the state of being accelerated: as— A gradual increase of velocity.
    • n acceleration In mech., the rate of change of the velocity of a moving body; that is, the increment of velocity (in any direction) in the unit of time which would result were the rate of change to continue uniform for that length of time. The acceleration is said to be uniform if the body gains the same velocity in any constant direction in equal successive portions of time, no matter how small these portions may be taken. A constant force produces uniform acceleration in all cases; but it is sometimes convenient to substitute for some of the forces fictitious “constraints.” Thus, gravity (which near the earth's surface is sensibly a constant force) gives a falling body uniformly accelerated motion when the effect of the atmospheric resistance is eliminated; in this case the increment of velocity in each second, which is a little more than 32 feet, is called the acceleration of gravity, and in mechanical formulas is denoted by the letter g. When the velocity of a moving body continually diminishes, the acceleration is termed minus or negative, and the motion is said to be retarded; this is illustrated by the case of a ball thrown upward, the upward component of the velocity of which diminishes at the rate of 32 feet a second. Similarly, the force of friction which resists the motion of a sliding body is said to give it minus or negative acceleration.
    • n acceleration The shortening of the time between the present and the happening of any future event; specifically, in law, the shortening of the time before the vesting of a person with the possession of an expected interest. In physiology and pathology, increased activity of the functions of the body, particularly of the circulation of the fluids.
    • n acceleration In biology, the supposed acquisition of new characters by adults, and their inheritance by descendants at earlier and earlier stages of their life; tachygenesis (which see).
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Chambers's Twentieth Century Dictionary
  • Interesting fact: If a car is travelling at 55 miles per hour it will travel 56 feet before the driver can shift his foot from the accelerator to the brake.
    • n Acceleration the act of hastening: increase of speed
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Quotations

  • Menander of Athens
    Menander of Athens
    “The school of hard knocks is an accelerated curriculum.”
  • Michael J. Gelb
    Michael J. Gelb
    “... by stretching yourself beyond your perceived level of confidence you accelerate your development of competence.”

Etymology

Webster's Revised Unabridged Dictionary
L. acceleratio,: cf. F. accélération,
Chambers's Twentieth Century Dictionary
L. accelerāre, -ātumad, to, celer, swift. See Celerity.

Usage

In literature:

But every year fills some blanks, and with accelerating speed as he becomes knowing and known.
"The Atlantic Monthly, Volume 09, No. 51, January, 1862" by Various
The "Customs Union" accelerated the pace.
"Lippincott's Magazine of Popular Literature and Science, Vol. XVII. No. 101. May, 1876." by Various
Cathartics are medicines which accelerate the action of the bowels, or increase the discharge by stool.
"Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889" by Barkham Burroughs
But the step behind him was accelerated, and he was hailed by name as Morales.
"The Radio Boys on the Mexican Border" by Gerald Breckenridge
It is the only way to accelerate peace.
"The Life of Napoleon I (Volumes, 1 and 2)" by John Holland Rose
The English invasions accelerated the growth of the French royal power and weakened domestic resistance to its ambitions.
"The Promise Of American Life" by Herbert David Croly
His inebriety increased upon him, accelerated, no doubt, by his business failure.
"William Lloyd Garrison" by Archibald H. Grimke
The boy did make the accusation, which served no purpose 'but to accelerate his hanging.
"The Land-War In Ireland (1870)" by James Godkin
Her own air of perfect ease in the circumstances very likely accelerated it.
"My Friend Prospero" by Henry Harland
The views of the scientists were not the cause of, but undoubtedly did accelerate, the drift from organized religion.
"Report of the Special Committee on Moral Delinquency in Children and Adolescents" by Oswald Chettle Mazengarb et al.
Human advance could not but be greatly, or even vastly, accelerated.
"The Whence and the Whither of Man" by John Mason Tyler
The flying men caught a glimpse of him and accelerated their movements.
"The Wings of the Morning" by Louis Tracy
All I'm goin' to do is to 'accelerate their departure,' as the poet says.
"The Go Ahead Boys and Simon's Mine" by Ross Kay
When Boswell speaks of Johnson's "accelerating her pulsation," she adds, "he checked it often enough, to be sure.
"Autobiography, Letters and Literary Remains of Mrs. Piozzi (Thrale) (2nd ed.) (2 vols.)" by Mrs. Hester Lynch Piozzi
Two oxides of the earthy alkaline metals, lime and hydrate of barytes, may also be used as accelerators.
"Scientific American Supplement, No. 832, December 12, 1891" by Various
And advance of this kind has been extraordinarily accelerated during the last twenty years.
"Recent Developments in European Thought" by Various
Mike's brain was functioning in high gear with overdrive added and the accelerator floor-boarded.
"Unwise Child" by Gordon Randall Garrett
Acceleration of the respiratory rate where no physiological cause operates is due to a variety of conditions.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
The T-247 spun on her axis, and abruptly the acceleration built up as the ion-rockets began to shudder.
"The Ultimate Weapon" by John Wood Campbell
The rocket swung, and lifted, and shot skyward with greater acceleration than before.
"The Pirates of Ersatz" by Murray Leinster
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In poetry:

Not that 'twould crown with joy my life,
That Bowden, or that Bowden's wife,
Brought me my daily pickings;
Though she, accelerating Fate,
Decrees the scanty mortal date
Of turkeys and of chickens!
"Ode To Dragon" by Hannah More
But Rowland,—no, nor Oliver,-—
Could get electromotive force,
Which fact and reason both aver,
Has change of some kind as its source,
Out of a disk in swift rotation
Without the least acceleration.
"Answer To Tait" by James Clerk Maxwell
- Lady, the destiny of minor powers,
Who would recast us, is but to convulse:
You enter on a strife that frets and sours;
You can but win sick disappointment's hue;
And simply an accelerated pulse,
Some tonic you have drunk moves you.
"A Ballad Of Fair Ladies In Revolt" by George Meredith

In news:

NJ's First Tech Accelerator, LaunchPad , Gets Busy at MSU.
The state of New Jersey is now attempting to take advantage of its proximity to New York City and the venture-investment dollars flowing into the region through what is called a tech accelerator.
It was in 1984 when FDA first added the 505(b)(2) pathway for drug approval, a hybrid between the accelerated pathway for generic drug applications, and the standard de novo NDA pathway for proprietary drugs.
The article "Student Denied Credit in Math Acceleration" really gives insight into how misunderstood gifted students really are.
Neovasc Inc Announces Lemaitre Vascular Will Accelerate its Acquisition of Rights to In-House Manufacture of Xenosure Product.
Don't let off accelerator, analysts advise GM.
Cancer Patients in need of radiation therapy can now take advantage of the new Varian IX (eye-x) Linear Accelerator that was put in operation at Sierra Nevada Memorial Hospital this week.
The region's first linear accelerator radiation equipment was delivered to the Cancer Center of Western Wisconsin on Friday, April 1.
Workers are busy installing a new $2.7 million Varian TrueBeam linear accelerator at the Thomas Family Cancer Center in Sequim.
Every day in Vancouver, experimental particle physicists simulate the Big Bang and the explosion of stars in the world's biggest and most sensitive cyclotron that accelerates 1,000 trillion particles a second to just under the speed of light.
Lou Gehrig's disease and a certain type of dementia appear to have something in common: a protein called TDP-43.The finding may "accelerate efforts to develop better therapies for these disorders," write the researchers.
The Mobile Airport Authority says it is accelerating parts of the master plan for redevelopment of Brookley Field to accomodate the needs of a soon to be built Airbus Assembly plant.
However, she said she could not confirm reports of witnesses who said the escalator accelerated.
World's Most Powerful Particle Accelerator Set to Launch.
French researchers finally develop a stable, two-laser-pulse particle accelerator that can be used for applications from materials science to medicine.
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In science:

The LG acceleration can also be estimated using surveys of the galaxies tracing the density inhomogeneities responsible for the acceleration.
The Dipole Anisotropy of the 2 Micron All-Sky Redshift Survey
The peculiar acceleration of the Local Group calculated using redshifts instead of real distances will differ from the actual LG acceleration (Kaiser 1987 and Kaiser & Lahav 1989).
The Dipole Anisotropy of the 2 Micron All-Sky Redshift Survey
S ) are components of the photon’s coordinate acceleration caused by mass and spin multipoles of the metric tensor respectively, and ¨xi (G) is the gauge-dependent acceleration.
General Relativistic Theory of Light Propagation in the Field of Radiative Gravitational Multipoles
As the Alfv´en velocity is, in our regime, much faster than the electron thermal velocity, we consider that the acceleration process is non-resonnant (and therefore not a Landau process), even if second-order resonance effects give more efficient acceleration in the direction of the wave (G´enot et al. 2001).
Comment on "PIC simulations of circularly polarised Alfv\'en wave phase mixing: A new mechanism for electron acceleration in collisionless plasmas" by Tsiklauri et al
Since Ω1 is essentially sensitive to acceleration, this amounts to the statement that the BBV 0.6 results favor more acceleration at the 1.6 σ level.
Measurement of \Omega_m, \Omega_{\Lambda} from a blind analysis of Type Ia supernovae with CMAGIC: Using color information to verify the acceleration of the Universe
As a result of this proposed simplification, the calculation of the acceleration of the averaged scale factor becomes relatively simpler and conclusions about acceleration can be drawn, for specific choices of the energy function.
The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models
In order to demonstrate that the acceleration obtained above is not an artifact of the singular behaviour of those models, we construct another set of models which show late time acceleration, and in which the spatial Ricci scalar (3)R remains finite everywhere.
The Possibility of Cosmic Acceleration via Spatial Averaging in Lemaitre-Tolman-Bondi Models
Suppose further that at a given time t = t′ the particle P extending over the tube begins to emit GW’s; let K ′ (t′ ) be the set of kinematical elements (velocity, acceleration, time derivative of the acceleration, etc.) of P at t = t′ .
No motions of bodies produce GW's
The theoretical challenge of explaining acceleration of protons to the highest energies is circumvented in non-acceleration models . A significant fraction of the UHE cosmic rays are predicted by these models to be photons (see e.g. [4,5]).
An upper limit to the photon fraction in cosmic rays above 10^19 eV from the Pierre Auger Observatory
The discovery of the acceleration of the Universe is one of the most intriguing questions in astrophysics today and has been the driver of many theoretical developments trying to find an explanation for this acceleration.
Sensitivity and figures of merit for dark energy supernovae surveys
While the most model independent analysis suggest that the acceleration of the universe to be below the de Sitter value , it is certainly true that the body of observational data allows for a wide parameter space compatible with an acceleration larger than the de Sitter’s [9, 8].
Generalized Second Law of Thermodynamics in Quintom Dominated Universe
If for a moment we assume that Newtonian dynamics breaks down in the low acceleration limit and non-baryonic dark matter does not exist, then the behavior of galaxies in the low acceleration limit should be typical of many other systems, as long as the acceleration is the same.
Using globular clusters to test gravity in the weak acceleration regime: NGC 7099
Therefore the internal dynamic of globular clusters do probe the same range of accelerations probed by galaxies, making them ideal for testing gravity in the low acceleration regime without the complication of dark matter.
Using globular clusters to test gravity in the weak acceleration regime: NGC 7099
All we can hope to reconstruct is not a unique underlying acceleration history with data-determined error bars, but an ensemble-averaged acceleration history with data-plus-theory error bars .
Roulette Inflation with K\"ahler Moduli and their Axions
The noise spectrum in acceleration is somewhat constant with frequency in the range 0.1 - 10 Hz, but since the accelerometers will be used to measure displacement, the acceleration needs to be integrated twice.
Study of the Dynamics of Large Reflector Antennas with Accelerometers
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