In the case of bone healing, PEMF uses electrical energy to direct a series
of magnetic pulses through injured tissue whereby each magnetic pulse induces a tiny electrical signal that stimulates cellular repair.
PEMF uses electrical energy to direct a series
of magnetic pulses through injured tissue, and each magnetic pulse induces a tiny electrical signal that stimulates cellular repair by upregulating a tissue repair protein called «heat shock protein» and also by increasing the uptake of oxygen and nutrients into tissue.
The correlation between the strength
of the magnetic pulses and the loudness of the sounds was also strong.
«This paper only makes sense if the observations [
of magnetic pulses] are good,» says John Ebel, a seismologist at Boston College, who wasn't involved in the research.
Not exact matches
It basically triggers the effect
of feeling a divine presence by subjecting the brain to weak
magnetic pulses, but some drugs and other conditions have done the same.
The inner region sends out clock - like
pulses of radiation and tsunamis
of charged particles embedded in
magnetic fields.
«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.»
To speed up these processes, researchers have recently started to explore the use
of ultrashort laser
pulses that can switch
magnetic domains in solid - state materials.
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.
To test the idea, Snyder and colleagues exposed subjects to low - frequency
magnetic pulses (the technology is called transcranial
magnetic brain stimulation, or TMS) that suppressed part
of their brain function.
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.
In Vader's device, an electrically -
pulsed magnetic field permeates liquid metal in an ejection chamber and creates circulating electrical currents that interact with the
magnetic field to produce a pressure that squeezes a droplet out
of the ejector nozzle.
But the researchers could use the results to apply a precise
magnetic field to the cesium vapor that effectively canceled out the ensemble's original spin state and replaced it with one that corresponded to the polarization
of the weak
pulse, as they report in the 5 October Nature.
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.
Highly focused
magnetic pulses of up to 1.5 teslas induce an electrical current two to three centimeters deep in the left prefrontal section
of the cerebral cortex.
Álvarez's team couldn't make spin measurements directly, but used brief
magnetic pulses to create an effect similar to measuring the orderliness
of the spins.
Ross and her colleagues applied
magnetic pulses to two different areas
of the brain in 25 healthy adults.
In a second set
of studies, the researchers temporarily disabled the right temporal parietal junction with
pulses of magnetism delivered through transcranial
magnetic stimulation, a technique used to treat Parkinson's disease and some intractable cases
of depression.
Understanding the two phenomena, which are both produced by interactions between charged particles and the planet's
magnetic field, may help to explain the variations in the timing
of the radio
pulses and to shed light on Saturn's geomagnetic workings.
As a read head moves above bits
of magnetic data, changes in the
magnetic orientation
of those bits alter the electrical resistance
of electrons flowing through the sensor, translating the
magnetic data into a stream
of electrical
pulses.
«The U.S. society and economy are so critically dependent upon the availability
of electricity that a significant collapse
of the grid precipitated by a major natural or man - made EMP [electro -
magnetic pulse] event could result in catastrophic civilian casualties,» Rep. Trent Franks (R - Ariz.)
Inertial confinement fusion (ICF) seeks to create those conditions by taking a tiny capsule
of fusion fuel (typically a mixture
of the hydrogen isotopes deuterium and tritium) and crushing it at high speed using some form
of «driver,» such as lasers, particle beams, or
magnetic pulses.
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.
Inertial confinement fusion achieves this by crushing tiny capsules
of fuel with intense laser or
magnetic field
pulses to achieve the required conditions.
The satellites observed the
pulses in the wake
of an October 2003
magnetic storm triggered by a coronal mass ejection — a plasma spitball shot out by the sun — that slammed into Earth's magnetosphere.
If orientated properly, a hot spot above the
magnetic pole
of the neutron star may whirl in and out
of view for observers on Earth, producing a regular train
of radio
pulses separated by anything from a few milliseconds to a few seconds.
Researchers apply current
pulses in a
magnetic field to boost the
magnetic ordering, that is, the number
of nanoclusters pointing in the same direction.
One critical parameter is the thickness
of the liner wall: The thinner the wall, the faster it will be accelerated by the
magnetic pulse.
They delivered short
magnetic pulses that briefly shut down different parts
of the brain.
In order to modulate the functioning
of fronto - striatal circuits, the researchers from the lab
of Robert Zatorre used a non-invasive brain stimulation technique, transcranial
magnetic stimulation (TMS), which uses
magnetic pulses to either stimulate or inhibit selected parts
of the brain.
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.
Perminder Sachdev at the University
of New South Wales in Sydney, Australia, says it is «very exciting» and also surprising that low - power
magnetic pulses can reverse a developmental disorder.
To break this limit in crystal size, an extremely bright X-ray beam was needed, which was obtained using a so - called free - electron laser (FEL), in which a beam
of high - speed electrons is guided through a
magnetic undulator causing them to emit laser - like X-ray
pulses.
A team
of researchers has devised perhaps the world's most intricate coin toss, a device utilizing vacuum chambers,
magnetic fields, lasers and microwave
pulses to produce a random string
of 0s and 1s — each representing heads or tails, essentially.
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.
It's the mass migration
of such holes that creates the large electrical currents responsible for generating the low - frequency
magnetic pulses that make their way to detectors on Earth's surface, they say.
For example, in the weeks before a magnitude - 5.4 quake struck about 15 kilometers northeast
of San Jose in October 2007, an instrument near the epicenter sensed a number
of unusual
magnetic pulses, presumably emanating from deep in the Earth.
For example, they are investigating networks
of nerve cells by detecting the
magnetic field each nerve cell
pulse emits.
In its rotating
magnetic field, electrons and positrons are accelerated up to relativistic energies and emit radiation that arrives to our telescopes in the form
of pulses every 33 millisecond, each time the neutron star rotates and meets our telescopic sight.
The device sends
magnetic pulses into the nerves
of the head and cerebral cortex, stopping migraines cold.
Along with the change
of laser size, the researchers also adjusted the
magnetic material through which the light travels and amplifies to a more powerful
pulse.
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).
Disrupting the fish's internal compass with the
magnetic pulse triggered changes in 181 out
of the roughly 40,000 genes they examined.
People might think twice about this technology if it meant turning their living rooms into microwave ovens, but the
pulsing magnetic fields
of the MIT system don't interact much with walls, people, or even tinfoil.
The
magnetic pulses that preceded these sounds proved that their sources were at an altitude
of approximately 75 meters.
Instead
of using a solenoid to generate a
magnetic field, CHI involves injecting a
magnetic field into the floor
of the tokamak, removing the need to deliver periodic
pulses of current.
This involved applying a
pulsed magnetic field that was perpendicular to the plane
of the domain walls.
With very strong
magnetic fields and very fast rotations, some neutron stars blast beams
of electromagnetic radiation from their poles, and if Earth is in the path
of those beams we can detect the signals as regular «
pulses» — hence the name pulsars.
In the presence
of the powerful
magnetic field, the protons are susceptible to excitation by selective radio frequency
pulses.
Kate also played a key leadership role in both the experiments and the manipulation
of the data sets in a program
of neutron and x-ray diffraction measurements in very high,
pulsed magnetic fields.