His aim is to incorporate a moment of maximum intensity, and this he does by the most direct means — the reduction of bodily attitudes to
their magnetic lines of force»... [29]
Maxwell's most important achievement was his extension and mathematical formulation of Michael Faraday's theories of electricity and
magnetic lines of force.
Not exact matches
When neuroscientist Sukhvinder Obhi «put the heads
of the powerful and the not - so - powerful under a transcranial -
magnetic - stimulation machine, he found that power, in fact, impairs a specific neural process, «mirroring,» that may be a cornerstone
of empathy,» writes Jerry Useem in the Atlantic, explaining head -
line grabbing recent research.
Simulation study
of enhancing laser driven multi-keV
line - radiation through application
of external
magnetic fields
Japanese prosecutors has raided the headquarters
of Shimizu Corp. and Kajiam Corp. — two
of Japan's largest construction firms — for alleged antitrust violations on a $ 80 billion contract for a
magnetic levitation train
line project.
It has a detachable long leather strap, has a front latch
magnetic closure, has a bottom zip compartment, has two side pockets, and is full
of cotton
lining.
These form in areas where
magnetic field
lines converge, producing cooler regions
of «only» about 3,000 — 4,000 degrees Celsius (by contrast with their surroundings
of 5,000 degrees Celsius or higher).
The corona is made up
of charged plasma, which roils in famous loops and fans that follow
magnetic field
lines emerging from the surface
of the sun (SN Online: 8/17/17).
(When rocks form, their
magnetic minerals
line up with Earth's field, and that orientation is preserved when the rocks solidify, providing geophysicists with a record, written in stone,
of the planet's
magnetic past.)
«One
of the main ideas here is that pulse differences have a lot to do with geometry — and it also depends on how the pulsar's spin and
magnetic axes are oriented with respect to
line of sight whether you see certain pulsars or not, as well as how you see them.»
Witness what physicist Michael Faraday saw in the 19th century, and many a schoolkid has since: iron filings neatly ordering themselves along the
lines of a
magnetic field,...
By combining observations from the ground and in space, the team observed a plume
of low - energy plasma particles that essentially hitches a ride along
magnetic field
lines — streaming from Earth's lower atmosphere up to the point, tens
of thousands
of kilometers above the surface, where the planet's
magnetic field connects with that
of the sun.
In an MRI machine, a powerful
magnetic field causes protons in the body to
line up like violin strings under tension, then a pulse
of energy plucks those «strings,» making them hum.
Physical picture
of the applied
magnetic field
lines (blue
lines) and the
magnetic field
lines (red
lines) modified by the plasma flow, i.e., sum
of the applied and plasma - induced
magnetic fields.
After correcting the logs for errors in location, Gubbins compared the directions
of captains» compass needles with the
magnetic properties
of rocks from the same period, allowing him to construct a time
line of movements in the
magnetic field.
In 23 fly - bys which passed through Titan's ionosphere or its
magnetic tail, CAPS detected measurable quantities
of these photoelectrons up to 6.8 Titan radii away from the moon, because they can easily travel along the
magnetic field
lines.
The simple fact that the maximum value
of volume current density was increased with increasing
magnetic field
line chaos, called «chaoticity,» suggests a direct proportionality between the intensity
of the current sheet and chaoticity.
Sunspots are areas
of intense magnetism, and solar flares erupt when
lines of magnetic energy intersect, break, and reconnect, releasing billions
of tons
of electrically charged particles.
«Chaotic
magnetic field
lines may answer the coronal heating problem: Scientists show how chaotic
magnetic field
lines result in stronger current sheets and extreme heating
of the sun's corona.»
From their analysis
of this occurrence, the team determined that a favorable evolution bring non-parallel
magnetic field
lines into close proximity and intensify current sheets.
But when the sun ejects major blasts
of particles in flares and solar storms, these belts overflow and send electrons streaming toward Earth along the looping
lines of the
magnetic field, which intersect the planet near the north and south poles.
These simulations provide new and novel insight regarding the influence
of chaotic
magnetic field
lines on the spontaneous development
of current sheets, and hence potential places
of particle acceleration.
The parallel sheets
of incoming and outgoing current force the electrons to emit coherent, laserlike radiation at radio wavelengths as they spiral along the planet's
magnetic field
lines, Ergun says.
All known magnets have both a north and south pole, as illustrated in the inset image, with
lines indicating the direction
of the
magnetic field.
Solar particles (the electric current) stream down Earth's
magnetic field
lines (the tube) and collide with molecules
of nitrogen and oxygen (the gas), exciting them until they glow in various colors.
The purplish aura reveals high - arcing loops
of 3.6 - million - degree plasma that link sunspots and other
magnetic areas on the surface; white
lines illustrate computer calculations
of how the
magnetic areas connect.
Swirling bundles
of magnetic field
lines, flinging particles outward from the poles
of the hole, provide a natural explanation.
The team found that this «pins» the
magnetic flux
lines in place as the wires sweep through the field, preventing the formation
of swirling
magnetic vortices that reduce current flow.
The distance between certain
lines in the spectrum reveals the strength
of the
magnetic field in that location — information that can't be measured directly otherwise.
So the north
magnetic pole is where the earth's
magnetic field
lines pull toward the planet, acting like the south pole
of a bar magnet.
«
Magnetic flux
lines interfere with the wires» ability to transport electricity, lowering its performance,» says Venkat Selvamanickam at the University
of Houston, Texas, where the US government is funding work via its Advanced Research Projects Agency — Energy.
This include flares and CMEs, as well as other features that might indicate that flares or eruptions are imminent, such as filaments, which are bundles
of plasma held down by
magnetic field
lines, coronal loops and sunspots.
Around spinning black holes, however, frame dragging could be hugely important: By whipping
magnetic field
lines through the electrically charged gas around the holes, it could convert them into electromagnetic generators, which would explain how they spew jets
of energetic particles millions
of light - years into space.
The UVIS images, which are also being analyzed by team associate Aikaterini Radioti at the University
of Liege, Belgium, also suggest that one way the bright auroral storms may be produced is by the formation
of new connections between
magnetic field
lines.
Since charged particles tend to follow
magnetic field
lines, moving along them in a sort
of corkscrew motion, the gas molecules fly not only outward but also upward and downward along the
magnetic field
lines.
You could put two
of those together and have the
magnetic fields
line up such that you could create a conventional gear, except their gear faces would not touch.
Faraday posed his theories in terms
of geometric structures, such as
lines of magnetic force.
If the sharks indeed have some way
of following
magnetic lines, when he engages the coils, the sharks will change directions.
They inject bunches
of electrons into a several - meter - long tube
lined with
magnetic «undulators.»
He reasoned that
lines of force were analogous to the paths followed by the molecules
of a fluid and that the strength
of the electric or
magnetic field was analogous to the velocity
of the fluid.
«We computed the Sun's
magnetic environment by tracing millions
of magnetic field
lines and looking at how neighboring field
lines connect and diverge,» said Antonia Savcheva, an astrophysicist at the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts, and co-author
of the paper.
Chintzoglou and his colleagues developed a model that identified locations on the Sun where the
magnetic field was especially compressed, since rapid releases
of energy — such as those they observed when the filament collapsed — are more likely to occur where
magnetic field
lines are strongly distorted.
Similar to how water in a bathtub forms a whirlpool as it goes down a drain, the gas and
magnetic fields that feed a supermassive black hole swirl to form a rotating disk — a tangled spaghetti
of magnetic field
lines mixed into a broth
of hot gas.
«The hyperbolic flux tube breaks the filament's
magnetic field
lines and reconnects them with those
of the ambient Sun, so that the filament's
magnetic energy is stripped away,» Chintzoglou said.
The
magnetic field
lines originate in the Earth's core and emerge near the poles, where their angle
of dip — or inclination — relative to Earth's surface is almost 90 degrees.
A team
of researchers at the Brazilian Center for Physics Research is studying the motion
of vortex domain walls — local regions
of charge that collectively store information via their configuration — driven by
magnetic fields in ferromagnetic nanowires, which are configured in a straight
line with an asymmetric Y - like branch.
Monarchs, they found, navigate north or south using the change in dip
of Earth's
magnetic field
lines with latitude.
Travis Horton at the University
of Canterbury, New Zealand, plotted the migratory tracks from each species over a detailed
magnetic map
of Earth, which shows how the
magnetic field's inclination and declination — the angular difference between the field
lines and true north — vary from point to point.
As astronomers report online today in Nature,
magnetic fields inside M33's six most massive giant molecular clouds — large concentrations
of dense gas and dust that give birth to stars —
line up with the spiral arms, suggesting the
magnetic fields helped create the huge clouds and that they regulate how the clouds fragment to form new stars.
The only
line of defense left to us would be Earth's meager
magnetic field.