# rotation

## Definitions

• WordNet 3.6
• n rotation the act of rotating as if on an axis "the rotation of the dancer kept time with the music"
• n rotation a planned recurrent sequence (of crops or personnel etc.) "crop rotation makes a balanced demand on the fertility of the soil","the manager had only four starting pitchers in his rotation"
• n rotation a single complete turn (axial or orbital) "the plane made three rotations before it crashed","the revolution of the earth about the sun takes one year"
• n rotation (mathematics) a transformation in which the coordinate axes are rotated by a fixed angle about the origin
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Webster's Revised Unabridged Dictionary
• Interesting fact: Venus is the only planet that rotates clockwise
• Rotation Any return or succesion in a series.
• a Rotation Pertaining to, or resulting from, rotation; of the nature of, or characterized by, rotation; as, rotational velocity.
• Rotation The act of turning, as a wheel or a solid body on its axis, as distinguished from the progressive motion of a revolving round another body or a distant point; thus, the daily turning of the earth on its axis is a rotation; its annual motion round the sun is a revolution.
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Century Dictionary and Cyclopedia
• Interesting fact: Jupiter is the fastest rotating planet, which can complete one revolution in less than ten hours
• n rotation The act of rotating or turning, or the state of being whirled round; the continuous motion of a solid body, as a wheel or sphere, about an axis, its opposite sides moving relatively to one another, as distinguished from the forward motion of the whole body in a circle or an ellipse independent of any relative motion of its parts, as that of the planets. Thus, the daily turning of the earth on its axis is a rotation; its annual motion round the sun is a revolution.
• n rotation A peculiar spiral movement of fluids observed within the cavity of certain vegetable cells, as in Chara and Vallisneria. See below.
• n rotation Serial or recurrent order; a round or sequence of one after another; a fixed or definite routine of succession; regularly recurring change.
• n rotation In forestry, the period represented by the age of a forest, or a part of a forest, at the time when it is cut, or intended to be cut.
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Chambers's Twentieth Century Dictionary
• Interesting fact: The earth rotates on its axis more slowly in March than in September.
• Rotation a turning round like a wheel: series or appropriate succession, as of crops: recurrent order
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## Quotations

• Steve G. Makris
“Always remember when you are on top of the world , that the earth rotates every 24 hrs.”

## Etymology

Webster's Revised Unabridged Dictionary
L. rotatio,: cf. F. rotation,
Chambers's Twentieth Century Dictionary
L. rota, a wheel.

## Usage

### In literature:

The disc was rotated at a uniform speed by an electric motor.
"Harvard Psychological Studies, Volume 1" by Various
The wind strikes the sails, and causes rotation; and the stronger the wind blows, the faster will the wheel rotate.
"General Science" by Bertha M. Clark
Townshend's two special hobbies were the field cultivation of turnips, and improvement in the rotation of crops.
"A Short History of English Agriculture" by W. H. R. Curtler
He sought to determine the time of the rotation of Venus since the year 1777.
"Biographies of Distinguished Scientific Men" by Francois Arago
Nor does it suddenly acquire the swifter rotation of the parts into which it enters.
"Memoir, Correspondence, And Miscellanies, From The Papers Of Thomas Jefferson" by Thomas Jefferson
The length of the rotation may vary from a two-course or two crop rotation to one of several courses.
"The First Book of Farming" by Charles L. Goodrich
The ship was going into rotation.
"Rip Foster in Ride the Gray Planet" by Harold Leland Goodwin
Movement is regular, forward, and combined with rotation.
"Marine Protozoa from Woods Hole" by Gary N. Calkins
Schiaparelli made this announcement concerning Venus but a few weeks after publishing his discovery of Mercury's peculiar rotation.
"Other Worlds" by Garrett P. Serviss
Destruction of young growth will stop the rotation at the time the surviving older material is harvested.
"Practical Forestry in the Pacific Northwest" by Edward Tyson Allen
The rotational speed of Earth at this latitude is seven-seven-eight.
"Space Tug" by Murray Leinster
Let this globe be rotated round the axis.
"Outlines of a Mechanical Theory of Storms" by T. Bassnett
You must choose a body which is not rotating and has no acceleration.
"The Concept of Nature" by Alfred North Whitehead
People used to say that he tried each of these shots in rotation.
"The Loom of Youth" by Alec Waugh
I have noticed that certain Continental banking institutions, with branches in various cities, keep their cashiers rotating.
"Little Journeys To The Homes Of Great Teachers" by Elbert Hubbard
A rotating black oblong.
"Brigands of the Moon" by Ray Cummings
MANURE AND ROTATION OF CROPS.
"Talks on Manures" by Joseph Harris
Since the rod is at rest, the tendency to rotate to the right and left must be equal.
"Physics" by Willis Eugene Tower
Rotation is her remedy.
"The Oxford Book of American Essays" by Various
Lastly, it may be a body rotating or intended to rotate, like a spindle, a spit, or the rolling cylinder of a machine.
"Plato's Doctrine respecting the rotation of the Earth and Aristotle's Comment upon that Doctrine" by George Grote
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### In poetry:

Whilst round in wild rotations hurl'd,
These glittering forms I view,
Methinks the busy restless world
Is pictured in a few.
"Impromptu to Miss Utrecia Smith" by William Shenstone
If Jove at that moment had hurled
The earth in some other rotation,
You had felt not the shock of creation.
"To A Moralist" by Friedrich von Schiller
While fates permit us, let's be merry;
Pass all we must the fatal ferry;
And this our life, too, whirls away,
With the rotation of the day.
"To Enjoy The Time" by Robert Herrick
I dreamed my genesis in sweat of sleep, breaking
Through the rotating shell, strong
As motor muscle on the drill, driving
Through vision and the girdered nerve.
"I Dreamed My Genesis" by Dylan Thomas
Over the housetops,
Above the rotating chimney-pots,
I have seen a shiver of amethyst,
And blue and cinnamon have flickered
A moment,
At the far end of a dusty street.
"The Captured Goddess" by Amy Lowell
The patchwork halves were cloven as they scudded
The wild pigs' wood, and slime upon the trees,
Sucking the dark, kissed on the cyanide,
And loosed the braiding adders from their hairs,
Rotating halves are horning as they drill
The arterial angel.
"My World Is Pyramid" by Dylan Thomas

### In news:

Margaret Petty visits 10 local day cares and Head Start programs on a rotational basis every couple of weeks.
BeerParc 845 Sixth Ave, btwn 29th and 30th sts, 646-600-7140 In the outdoor plaza right behind FoodParc in the Eventi Hotel, this 12,000-square-foot beer garden has 10 taps and serves a rotating list of brews .
BOC may end rotation of vice chairmanship .
Rotation with Theo R. From michael engelken in-studio performed wednesday june 20, 2012.
A one-pan Thanksgiving dinner gets in all the treasured familiar flavors in quantities to serve two -- and spare you the dishwashing rotations.
As I get older, they seem to be rotating much quicker than I remember from my childhood.
Rotation with Kyle S. Thanks for applying to KJHK.
Heavy Rotation, our top spins for the week of November 2, 2009.
Rotation with Ian W. The conference season is coming to a close with Kansas, Missouri and Baylor fighting for the conference title with the relative safety of a probable NCAA tournament berth.
Colorado Rockies plan to use " piggyback " four-man rotation in 2013.
Detroit Pistons' Will Bynum figures more prominently in rotation as opener draws near.
The BEA Golden Psi Award recognizes schools in rotating regions that use evidence-based practices to.
Collin McHugh, who starts for Triple-A Buffalo today, will reenter the major league rotation on Monday against the St Louis Cardinals at Busch Stadium, Terry Collins said.
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### In science:

The rotationally supported dwarfs, (the fast rotators) either are systematically too faint or systematically rotate faster than expected from the T-F relation.
The faint end of the Tully-Fisher relation
Rotations obviously commute with all constraints and Hamiltonian H , therefore, the eigenspaces of H should be rotationally invariant, and can be decomposed into a sum of irreducible representations of rotation group, correspondent to deﬁnite values of spin. 5.
String theory in Lorentz-invariant time-like gauge
First, it allows arbitrary unitary rotations on each qubit and second, it performs the quantum controlled rotation operation whereby one of the qubits (the target qubit) is rotated through an arbitrary angle, if, and only if, the other qubit (the control qubit) is oriented in a speciﬁed direction.
A Self Assembled Nanoelectronic Quantum Computer Based on the Rashba Effect in Quantum Dots
Rotation and infall velocity were added to such conﬁguration, simulating the evolution depending on the prescribed rotation rates and rotation laws.
Numerical hydrodynamics in general relativity
In the case of non–conservative rotation law, the corrections to the von Zeipel theorem depend on the opacity law and on the degree of differential rotation, but they are small, i.e. ≤ 1% in current cases of shellular rotation (Kippenhahn 1977; Maeder 1999).
Stellar Evolution with Rotation V: Changes in all the Outputs of Massive Star Models
The present saturation effect occurs because outward transport of angular momentum by shears are larger when rotation is larger, also a larger rotation produces more mass loss, which makes a larger reduction of rotation during the evolution.
Stellar Evolution with Rotation V: Changes in all the Outputs of Massive Star Models
The non–enriched stars with low rotation can be interpreted either as stars with small initial velocities or as young fast rotators whose surface has not yet been enriched in helium by rotational mixing (see also Herrero et al. 1999).
Stellar Evolution with Rotation V: Changes in all the Outputs of Massive Star Models
To see this, note that in SU (5) we can always diagonalize the u mass matrix by a rotation of the ﬁelds in the 10, the Ma jorana matrix M by a rotation of the 1 and the effective neutrino matrix mν by a rotation of the ¯5.
The problem of neutrino masses in extensions of the Standard Model
Once all Z rotations are gathered at the end of the pulse sequence, we only need to execute the net remaining Z rotation for each spin. Z rotations moved to the start of the sequence have no effect as the initial state is diagonal (see section 4.4), so they don’t need to be implemented altogether.
Experimental Quantum Computation with Nuclear Spins in Liquid Solution
If we rotate pj by angle αik ij with respect to center of rotation pi and multiply the image of the rotation by β ik ij , we get pk .
Limits of Voronoi Diagrams
Thus, for the non-rotating and counter-rotating cases, there are smooth solutions of matter passing through the inner sonic point, while for the co-rotating cases, it is not so.
Stability of accretion disk around rotating black holes: a pseudo-general-relativistic fluid dynamical study
Chakrabarti 1996b,c; Gammie & Popham 1998; Popham & Gammie 1998), those do not concentrate on the comparative study of a rotating and non-rotating black hole and the instability of disk induced by the rotation of black hole.
Stability of accretion disk around rotating black holes: a pseudo-general-relativistic fluid dynamical study
Now the question may arise, how would a ﬂow behave in the region where sonic points disappear because of the higher rotation of black hole? It can be thought as, matter would try to pass through same sonic point as of non-rotating (or slowly rotating) case.
Stability of accretion disk around rotating black holes: a pseudo-general-relativistic fluid dynamical study
In the following, we will sometimes use the short, simpliﬁed expression “self-gravitating rotation curve” (as opposed to Keplerian rotation curve) when we will refer to the rotation curve derived from Eq. (8) for a model that includes the effects of the disk self-gravity.
Probing the rotation curve of the outer accretion disk in FU Orionis objects with long-wavelength spectroscopy
The differential rate of displacement varies in step with ve , being largest close to critical rotation, and so small for the slowly rotating models (ve = 0.24 vc ) that they can barely be distinguished from their non-rotating neighbours.
Be-star rotation: how close to critical?
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