In the new study, published online today in Science, Dickman and BCM biologist Le - Qing Wu placed seven homing pigeons (Columba livia) in a dark room in the center of a cube - shaped set
of magnetic coils.
Another issue Motojima has had to grapple with is whether or not to add another set
of magnetic coils to the interior walls of the reactor to help control disturbances in the plasma called edge - localized modes (ELMs) that can damage the inside of the plasma vessel.
One goal of her research is to supersede the limitations of today's conventional, doughnut - shaped tokamaks, which consist
of a magnetic coil, or solenoid, resting within a central hole.
Not exact matches
He's got some sort
of obsession about copper
coils or some metal
coils on the sun, and lamb has been posting those absurd
magnetic coil videos.
It uses a complex arrangement
of superconducting
magnetic coils, as shown below.
From their website: the NuWave PIC is comprised
of a series
of induction
coils (based on
magnetic principles).
He won't be looking for elusive infrared photons, but instead will be taking rapid - fire images
of plasma loops —
coils of ionized gas trapped in billowing
magnetic fields — arcing off the sun and peeking out from behind the moon.
At the far end
of the chamber are the ends
of eight
magnetic coils, each pointing toward the center
of the central chamber.
Electromagnetic
coils are positioned near a patient's skull to deliver brief pulses
of magnetic fields; these induce electric currents inside the head, which cause neurons to fire in brain regions associated with mood.
The DCRS is composed
of two (transmitting and receiving)
magnetic dipole
coils, placed in parallel, with each
coil having a ferrite core and connected with a resonant capacitor.
In their study, subjects underwent 40 seconds
of disruptive transcranial
magnetic stimulation (TMS)-- in which a
magnetic coil placed near the skull produced small electric currents in the brain that inhibited activity
of the posterior TPJ — then spent 30 minutes completing a task.
A
magnetic coil surrounds the tube and receives a short - lived electrical pulse to create a pressure within the tube that ejects a droplet
of liquid metal through the orifice.
They used high - frequency
magnetic materials in a dipole
coil structure to build a thin, flat transmitter (Tx) system shaped in a rectangle with a size
of 1m2.
The way reconnection disturbs terrestrial power grids is complex but, in essence, the process mimics what happens in electric generators, where a fluctuating
magnetic field (usually a moving magnet) produces a current in a
coil of wire, says Adam Szabo, director
of NASA's Heliophysics Laboratory.
An array
of wire
coils generates a
magnetic field and when a phone disrupts that field, MagMIMO senses it and focuses on the phone by creating a slightly different field with each
coil.
Helmholtz
coils change the
magnetic field
of whatever is between them.
Still, progress on the toroidal
coils seems faster than on the second
of the reactor's key
magnetic arrays, the so - called poloidal field
coils.
If the sharks indeed have some way
of following
magnetic lines, when he engages the
coils, the sharks will change directions.
To test the particles, the researchers implanted mice with a tumorlike gel saturated with nanoparticles and placed those mice into the wells
of cup - shaped electrical
coils, which activated the nanoparticles via
magnetic pulses.
Fair warning: The
magnetic field required by each
coil to bend the beam would be so huge that the surge
of power through it might melt the
coil, making it usable only once.
When the wire is
coiled, the
magnetic field is concentrated in the center
of the
coil.
Much
of the savings will be in the superconducting cables that are wound into enormous
magnetic coils to produce the powerful fields that hold the reactor's superhot plasma in place.
This so - called transcranial
magnetic stimulation (TMS) triggers the flow
of small electrical currents in neural circuits beneath the
coils.
Instead
of streaming out
of a metal casing and turbine, a blazar's jets «are confined and focused by
coiled magnetic fields originating near the [supermassive] black hole.»
To signal which direction to move, the researchers generated a phosphene through transcranial
magnetic stimulation, a well - known technique that uses a
magnetic coil placed near the skull to directly and noninvasively stimulate a specific area
of the brain.
Inside the
coil is a rod
of terbium dysprosium, which is a magneto - strictive material — its length changes with the
magnetic field.
To activate the EPM, a large 50 μs, 7 A current pulse is sent through the
coil, inducing a
magnetic field strong enough to reverse the magnetization
of the soft magnet.
EPMs are a
magnetic assembly consisting
of two permanent magnets (one hard — very difficult to demagnetize, one soft — easy to demagnetize), two ferromagnetic poles, and a
coil.
Top: A piece
of BaFe2As2 is stretched while
magnetic measurements are taken (the copper wire
coil is part
of the NMR device).
They made a hose from a cylinder
of superconducting material filled with a highly
magnetic cobalt - iron alloy, then ran a current through a
coil at one end to produce a field (arxiv.org/abs/1304.6300).
Most large tokamaks create the plasma with solenoids — large
magnetic coils that wind down the center
of the vessels and inject the current that starts the plasma and completes the
magnetic field that holds the superhot gas in place.
PCI looks at the brain's response to transcranial
magnetic stimulation (TMS), where a
magnetic coil is held up to the surface
of the skull, generating a pulse to stimulate the neurons beneath and provoke a response that radiates through the brain.
With a grid
of electric
coils, they simulated
magnetic fields found at three critical points in the turtles» migratory routes.
These pulses
of electricity create a flickering
magnetic field that passes over most objects, except the powered
coil's mate (which can be made small enough to fit into consumer electronics).
The researchers also repositioned the
coil on the inquirer's head at the start
of each game, but for the control games, added a plastic spacer undetectable to the participant that weakened the
magnetic field enough to prevent the generation
of phosphenes.
Fish - eye view
of interior
of W7 - X showing graphite tiles that cover
magnetic coils.
«The trim
coils have proven extremely useful, not only by ensuring a balanced plasma exhaust onto the divertor plates, but also as a tool for the physicists to perform
magnetic field measurements
of unprecedented accuracy,» said Thomas Sunn Pederson, Max Planck director
of stellarator edge and divertor physics.
There are three particular challenges to overcome in the design and manufacture
of such leading - edge superconducting magnets — the stresses within the
magnetic coils, the management
of the very high stored energy within the magnet and the integration
of LTS and HTS
coils.
Five superimposed images
of W7 - X
magnetic surfaces displaced by changes in application
of trim
coil currents.
Patients remain awake for the 30 minute sessions, but have been known to drift into comforting slumber because the
magnetic hum
of the two copper
coils on each side
of the cockpit are so comforting.
The impedance
of a planar
coil suspended on a torsion beam and placed in a strong
magnetic field is analyzed.
If you move a
magnetic field near a
coil of wire the electrons in the wire get excited and electricity will be made.
The stator is the stationary
coil of wire that is excited by the spinning
magnetic field
of the rotor.
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.
Magnetic coils wrapped around the dampers change the viscosity
of the fluid, letting the dampers become more rigid or looser, as needed.
When a voltage is applied to a
coil, a
magnetic field is generated in which the alignment
of the particles changes so that they are perpendicular to the oil flow, thereby inhibiting its flow through the shock absorber channels.
The
magnetic component
of these fields is picked up by the sensor
coils in the headphones.
Using these new commercially available superconductors, rare - earth barium copper oxide (REBCO) superconducting tapes, to produce high -
magnetic field
coils «just ripples through the whole design,» says Dennis Whyte, a professor
of Nuclear Science and Engineering and director
of MIT's Plasma Science and Fusion Center.
Computer CRTs are an example with the electron beam forced towards the phosphor - coated screen by more or less «static» electric field all the while under the back and forth influence
of a dynamic
magnetic field from the deflection
coils (called «the yoke» in the trade).
[23]... [T] he evidence is that much
of this equipment is commonly used in university science laboratories and in other settings involving the production
of magnetic fields using electric currents through
coiled wires.