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Topic: Reverse rotation effect

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	The Wagon Wheel Effect - Crystalinks
		The wagon-wheel effect, (alternatively, or stagecoach-wheel effect, stroboscopic effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation.
		Stroboscopic conditions ensure that the visibility of a rotating wheel is broken into a series of brief episodes in which its motion is either absent (in the case of movie cameras) or minimal (in the case of stroboscopes), interrupted by longer episodes of invisibility.
		(2004) concluded that the reverse rotations were consistent with Reichardt detectors for the reverse direction of rotation becoming sufficiently active to dominate perception of the true rotation in a form of rivalry.
	crystalinks.com /wagonwheeleffect.html (1480 words)

	Reverse rotation effect -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-03)
		Reverse rotation of wheels usually only occurs in (Photographic material consisting of a base of celluloid covered with a photographic emulsion; used to make negatives or transparencies) film recording (for (A telecommunication system that transmits images of objects (stationary or moving) between distant points) television or (A theater where films are shown) cinema).
		The same effect can be noted on recordings of (An aircraft without wings that obtains its lift from the rotation of overhead blades) helicopter rotors and (A vehicle that can fly) aircraft (A mechanical device that rotates to push against air or water) propellers.
		Reverse rotation effect is also visible on spoked wheels illuminated by certain type of artificial lighting rather than sunlight.
	www.absoluteastronomy.com /encyclopedia/r/re/reverse_rotation_effect.htm (374 words)

	Linear actuator with anti-reverse-rotation mechanism - US Patent 6240797 (Site not responding. Last check: 2007-11-03)
		Rotation of the ball screw shaft A4 is converted into linear reciprocating motion of an actuating member (not shown) connected to a ball nut (not shown) threaded with a screw portion (not shown) formed on the distal end side of the ball screw shaft A4.
		Since rotation of the inner cylinder 4 relative to the outer cylinder 3 is prevented by the external driven member, when the ball screw shaft 4 is driven in rotation by the rotary drive source 11, the ball nut 13 moves back and forth depending on the rotating direction of the ball screw shaft 5.
		From this condition, the rotary drive source 11 is driven to rotate the ball screw shaft 5 in a direction to extend the inner cylinder 4 whereupon the inner race 6B and the friction collar 19 rotate together with the ball screw shaft 5 in the direction of the arrow Y shown in FIG.
	www.patentstorm.us /patents/6240797.html (4379 words)

	Method for preventing a reverse rotation of an engine - US Patent 6786212 (Site not responding. Last check: 2007-11-03)
		Since a reverse rotation of the engine does not occur while the starter motor is operating, an occurrence of the reverse rotation of the engine is checked in the case that the starter motor has stopped, according to an embodiment of a method for preventing a reverse rotation of an engine of the present invention.
		When the rotation of the engine is changed from a forward rotation to a reverse one, three pulse intervals of a pulse interval (i.e., tnbm1) during the forward rotation, a pulse interval (i.e., tnbm2) containing the stopping point, and a pulse interval (i.e., tnbm3) during the reverse rotation are consecutively obtained.
		If a reverse rotation of an engine originates at a specific cylinder, the cylinder must be in a compression stroke at the time when the reverse rotation of the engine starts, and the compression pressure must be sufficiently high so as to push down a piston in the cylinder.
	www.patentstorm.us /patents/6786212.html (4876 words)

	Knowledge King - Reverse rotation effect (Site not responding. Last check: 2007-11-03)
		Reverse rotation effect is an optical illusion caused by car wheels which appear to rotate backwards when reaching a certain velocity.
		Reverse rotation of wheels usually only occurs in film (television or movies).
		Reverse rotation effect is also visible on car wheels illuminated by artificial lighting rather than sunlight.
	www.knowledgeking.net /encyclopedia/r/re/reverse_rotation_effect.html (243 words)

	Coriolis effect Summary
		The Coriolis effect caused by the rotation of the Earth is responsible for the precession of a Foucault pendulum and for the direction of rotation of cyclones.
		Due to the effect, cyclones rotate counterclockwise in the Northern hemisphere and clockwise in the Southern hemisphere.
		In meteorology, Coriolis effects tend to dominate the centrifugal effects associated with, for example, the rotation of large cyclones, because the latter are usually balanced by an ambient pressure gradient (exactly analogously to the slope on a parabolic turntable).
	www.bookrags.com /Coriolis_effect (4583 words)

	Rotation Summary
		Rotation is the movement of an object in a circular motion.
		This is a consequence of Euler's rotation theorem.
		This rotation induces a centrifugal acceleration which slightly counteracts the effect of gravity the closer one is to the equator.
	www.bookrags.com /Rotation (2269 words)

	Encyclopedia: Reverse-rotation-effect (Site not responding. Last check: 2007-11-03)
		The reverse rotation effect, sometimes called the wagon-wheel effect, is an optical illusion in which a spoked wheel appears to rotate backwards.
		Reverse rotation effect is also visible on spoked wheels illuminated by lighting that is temporally modulated.
		Illusory motion reversal is caused by rivalry, not by perceptual snapshots of the visual field.
	www.nationmaster.com /encyclopedia/Reverse_rotation_effect (1078 words)

	The Rotation Over The Bar In The Fosbury (Site not responding. Last check: 2007-11-03)
		The twist rotation is generated in part by swinging the lead leg up and somewhat away from the bar during the takeoff, and also by actively turning the shoulders and arms during the takeoff in the desired direction of the twist.
		Rotational action and reaction is sometimes called "catting" because cats dropped in an upside-down position with no angular momentum use a mechanism of this kind to land on their feet.
		The rotation of this athlete over the bar will not be very good, and the result of the jump will be worse than if the athlete had allowed the trunk to rotate to the vertical at the end of the takeoff.
	www.coachr.org /rotation.htm (5390 words)

	rotation
		Rotation is the movement of a body in such a way that any given point of that body remains at a constant distance from some other fixed point.
		In astronomy, rotation is a commonly observed phenomenon.
		One consequence of the rotation of a planet is the phenomenon of precession.
	www.fact-library.com /rotation.html (344 words)

	The Structure of the Physical Universe, Chapter III
		Rotation at unit velocity is therefore indistinguishable from the normal space-time progression; that is, from the physical standpoint it is the equivalent of no rotation at all.
		Another necessary characteristic of the rotational motion of the photons is that its direction must be opposite to that of the space-time progression, because any added displacement in the positive direction would result in a directional reversal and would produce a vibration rather than a rotation, as previously explained.
		Although simple rotation around the vertical axis in the same space-time direction as the two-dimensional rotation is impossible, now that the photon is rotating around the horizontal axes the entire system can be rotated around the vertical axis in the opposite space-time direction.
	www.reciprocalsystem.com /spu/spu03.htm (2270 words)

	Reverse rotation effect - Encyclopedia, History, Geography and Biography
		If the wheel begins to slow down slightly, it does not have time to rotate to its original position before the shutter opens again and in effect appears to be rotating backwards.
		The same effect can be noted on recordings of helicopter rotors and aircraft propellers.
		Although 120 flickers per second is too fast for most humans to perceive directly, such lamps can produce stroboscopeic effects.
	www.arikah.com /encyclopedia/Reverse_rotation_effect (324 words)

	wikien.info: Main_Page (Site not responding. Last check: 2007-11-03)
		Reversal of Fortune is a 1990 film which tells the true story of the permanent coma of socialite Sunny von Bülow and the attempted murder trial and subsequent acquittal of her husband, Claus von Bülow.
		Reverse phone lookup For instance, when someone says they need to look up a phone number, they usually mean that they know a person or business' name and want to find out what their phone number is...
		Reverse osmosis is the process of forcing a solvent from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure in excess of the osmotic pressure.
	www.alanaditescili.net /browse.php?title=R/RE/REV (10503 words)

	Foucault's Pendulum and the Coriolis effect
		Rotational calculations do not involve the direction to the real centre of mass, rather in all cases the direction must be radiant from the axis to the circumference.
		To degrade this amazing effect using the premature descriptive conclusion "proves the Earth rotates" denies science credibility because a far more important question was not answered, that being, "Relative to what and measured against what standard?" A fundamental question that if left unanswered would challenge the integrity of the scientific method and the sciences.
		Due to the high rotational speed, one would expect the atoms along the equator to be thrown off due to the high rotational speed.
	www.geocities.com /longhairedbastard/coriolis.htm (3602 words)

	Encyclopedia: Wheel (Site not responding. Last check: 2007-11-03)
		More generally the term is also used for circular objects rotating for other purposes, such as a wheel and axle and a flywheel.
		Spoked flywheel A flywheel is a heavy rotating disk used as a repository for angular momentum.
		Wheels are used in conjunction with an axle, either the wheel turns on the axle or the wheel is rigidly attached to the axle which then turns in bearings in the body of the vehicle.
	www.nationmaster.com /encyclopedia/Wheel (2876 words)

	Rotation (disambiguation) (Site not responding. Last check: 2007-11-03)
		The reverse rotation effect being an optical illusion.
		The rotation curve for the variation in a circular orbital.
		In baseball pitching, the rotation is the group of starting pitchers for a team, and the order in which they pitch.
	www.sciencedaily.com /encyclopedia/rotation__disambiguation_ (314 words)

	Adding Environmental Effects to Torque
		Rotation and scale can be left as is. The three specifics we're interested in are dataBlock, emitter, velocity.
		You can reverse the image alpha channel with the boolean useInvAlpha parameter; this simply means you used white to create the alpha channel instead of fl.
		The next two specifics are used for effects tied to shape objects and can be commented out or deleted.
	holodeck.st.usm.edu /vrcomputing/vrc_t/tutorials/effects/p5_particles.shtml (1387 words)

	Isotope Effects at BNL, 1947-67
		A theoretical treatment of the effects of isotopic substitution on equilibrium constants showed that it was not necessary to calculate individual partition functions for each isotopic species.
		Rates of chemical reaction also are affected by isotopic substitution; the origins of rate effects have been sought within the framework of the transition state theory of chemical reactions, and the predictions have been tested experimentally.
		The first quantum correction leads to a correlation between isotope effects and chemical bonding and establishes the power of the isotope effect method as a probe for the chemical bonding of each atom in a molecule of any complexity.
	www.bnl.gov /chemistry/History/IsotopeEffects.asp (1562 words)

	THE SAGNAC EFFECT
		Remember, that if such a rotation exists, the experiment cannot distinguish between whether the earth actually rotates and the ether is at rest, or whether the earth does not rotate and the aether spins around it.
		Sagnac rotated his turntable at two revolutions per second and found the expected effect; that is, he demonstrated that absolute rotation could be measured.
		The effect of the Earth's gravitational field manifests itself when the interferometer crystal is rotated around a horizontal axis in such a way that one beam path experiences a higher gravitational potential [energy] that the other.
	www.ldolphin.org /sagnac.html (982 words)

	The Anatomy of a Screwball
		Reverse slider type - this is a spiral type spin with an action similar to a slider but with a reverse effect.
		Reverse slider screwgy - fingers are pointing toward batter - thumb is pronated outward and spiral spin is effected.
		Learning rotations for unusual pitches, such as the screwgy - the aspiring pitcher wishing to develop a serious consciousness and awareness on spin dynamics, can use the concomitant knowledge which easily translates to improving fastball movement and the enhancement of other pitches.
	pitchingprofessor.com /Article_SCREWBALL.html (1033 words)

	Optical illusion - Wikipedia, the free encyclopedia
		Physiological illusions, such as the afterimages following bright lights or adapting stimuli of excessively longer alternating patterns (contingent perceptual aftereffect, CAE), are the effects on the eyes or brain of excessive stimulation of a specific type - brightness, tilt, colour, movement, and so on.
		Other distortions, such as converging line illusions, are more difficult to place as physiological or cognitive as the depth-cue challenges they offer are not easily placed.
		All pictures that have perspective cues are in effect illusions.
	www.wikipedia.org /wiki/Optical_illusion (657 words)

	Reliance Electric - Motor Glossary (Site not responding. Last check: 2007-11-03)
		An AC motor is reversed by reversing the connections of one leg on three-phase power or by reversing the leads on single phase.
		Since there is no rotating field, after the starting winding is deenergized,the rotation cannot be changed until the motor has come to rest or at least slowed down to the speed at which the automatic switch closes.
		Special starting switches are available as well as special reversing switches which have a means for shunting the open contracts of the automatic switch while the motor is running and thus permits the split phase motor to be reversed while rotating.
	www.reliance.com /prodserv/motgen/b9652new/b9652.htm (10635 words)

	Hall effect - SensorWiki
		In "B" and "C", either the electric current or the magnetic field is reversed, causing the polarization to reverse.
		Reversing both current and magnetic field (drawing "D") causes the Hall element to again assume a negative charge at the upper edge.
		It was also employed to measure speed of rotation in Elliot Sinyor's Gyrotyre, in a configuration similar to that shown below.
	www.sensorwiki.org /index.php/Hall_effect (695 words)

	Aerospaceweb.org \| Ask Us - Wind and Earth Rotation
		Furthermore, the Earth rotates fastest at the Equator, so according to your theory, this region is where the winds should blow the hardest.
		Nevertheless, you are correct in that the Earth's rotation does play some role in the formation of winds, and therefore has an indirect effect on the difference in east-to-west flight times.
		It is instead a complex fluid dynamics problem that involves the Earth's rotation, imbalances in the heating of the atmosphere caused by the Sun, and the absorption and radiation of heat by large bodies of water.
	www.aerospaceweb.org /question/atmosphere/q0117.shtml (973 words)

	Glossary of Terminology Related to Nuts and Bolts
		The deformation and the load sustained by an individual bolt in a bolt group is dependent upon the distance that the bolt is from the instantaneous centre.
		Pooching is a term sometimes used to describe the effect of the area immediately surrounding a tapped hole being raised up as a result of the tension from the stud.
		The angle of rotation of the fastener is measured relative to the applied torque, yield being assessed when the slope of the relationship changes to below a certain value.
	www.boltscience.com /pages/glossary.htm (6068 words)

	Fiber Optic Wheel Sensor
		The rotation direction is the same even when the light propagation direction is reversed, so that the rotation angle is doubled by sending the light back through the crystal with a mirror.
		Furthermore, the Faraday effect in iron garnets saturates at large fields, so that the crystal can be made to produce not more than 90 degrees of total rotation at saturation to ensure that the transmitted signal is a monotonic function of the field.
		Since the Faraday rotation depends on the component of the optical path along the magnetic field direction, all the light is rotated by the same angle, whether or not it has been diffracted, so long as the field is uniform over the crystal dimensions.
	www.lanl.gov /p-22/wheel.html (877 words)

	Rotation Operators (Site not responding. Last check: 2007-11-03)
		One may obtain the rotation matrix in a multiple spin system by taking direct products of the single spin operators in accordance with equation (18-155).
		The explicit formula for a rotation in the xy-plane of a single spin 1/2 particle may be obtained by placement of equations (18-75) and (18-102) into equation (18-106).
		The explicit formula for a rotation in the yz-plane of a single spin 1/2 particle may be obtained by placement of equations (18-89) and (18-102) into equation (18-106).
	gamma.magnet.fsu.edu /html/modules/hslib/spinopa4.htm (2495 words)

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