Not exact matches
The company has developed a machine that uses electricity to print the
magnetic equivalent of pixels
on a surface — complex patterns of north and south
polarity points — allowing precise control over the topology of the
magnetic fields.
But the Earth keeps right
on rotating when the
magnetic field goes through one of it's more random phases that's the primary reason why it eventually becomes dipolar (like a bar magnet) again, although sometimes with the opposite
polarity.
Heinrich used a scanning tunneling microscope to align the iron atoms so each one takes
on a
magnetic polarity opposite that of its neighbor.
According to the leading theory, a flare is set off when nearby
magnetic fields of opposite
polarity break and reconnect, creating a closed loop with two footprints
on the solar surface.
He sketched the sunspot contours with scribble and crosshatch, intent mainly
on mapping the locus (solar latitude and longitude) of each
magnetic outburst and gauging the
polarity and field strength (in gauss) of every sunspot.
These might be based
on crystals of magnetite, which align with the Earth's
magnetic field and could pull
on some kind of stretch receptor or hair - like cell as it changes
polarity.
These bifurcations cause vortex - antivortex pairs to move together along the «
magnetic roads» either in one orientation or the opposite, depending
on their
polarities.
The team investigated patterns of
magnetic reversals — another method to determine age based
on knowledge about an era's
magnetic orientation — and calibrated the sediments containing the fossils using Geomagnetic
Polarity Time Scale (GPTS).
Using LOS magnetograms, the authors observed a small region of transient
polarity - reversed
magnetic field in the main sunspot of NOAA 11429
on 13 March 2012, which corresponded with flare brightenings seen in intensity images.
Between pairs of opposite
polarity,
magnetic field connections exist, represented here by lines based
on computer calculations.
On a permanent magnet motor, you effectively just reverse one
magnetic field (the rotor) when reversing
polarity, and that it why they will rotate in the opposite direction.
Therefore both the stator and rotors are using coils from the same feed and reversing the
polarity of the feed reverses the direction of the
magnetic fields
on both the stator coils and rotor coil - the result being that the motor will rotate in the same direction as before anyway.
16 international artists who reflect
on and explore
polarities of two
magnetic opposites that are violence & silence.
The solar
magnetic cycle that flips
polarity at the poles approximately every 11 years is dependent
on the reversing flux from spent sunspots that migrate to the poles.
«since then he has been attracted by the same possibility that absorbed Dr. Abott, of washington, for a time, namely that of using a single cycle based
on the discovery by Ellery Hale, of Mt. Wilson, that the sun reverses its
magnetic polarity in the spots with every sunspot period.
Who is to say that the effects of the
polarity reversal of the Sun's
magnetic field (marking Solar Cycle 24's midpoint) will not act in concert with other natural forces to amplify the effects of the Sun
on the Earth's future climate in ways we can not comprehend?
Scenario for a climate disaster movie suggests itself — when the Earth's
magnetic field goes to nothing
on the way to reversing
polarity.
Data is stored by changing the
polarity of the
magnetic bits
on the surface of the platters.
In terms of read / write life, however, HDDs win (there is no write limit
on a
magnetic disk, you can change the
polarity and indefinite number of times).