The movements is transformed into electricity using an alternator that increases the frequency of the mast movement.
Once fully developed, the armour could transform from a liquid to a solid in a fraction of a second when under the influence of a magnetic field, or electric current.
climb walls and even transform into a TANK Researchers have unveiled the nearest thing yet to a real-life transformer-a human sized robot that can walk,
and add a massive, out-of-plane magnetic field. When you do that it becomes possible to see
when the electronic energy levels of the material are plotted against the applied magnetic field. Originally proposed by Douglass Hofstadler in 1976,
In the present case, the researchers used fields up to 45 Tesla that were available at the National High Magnetic field Laboratory in Tallahassee.
As a graphical representation of the fractal structure of the energy spectrum for electrons in a magnetic field,
The researchers previously demonstrated something known as a uantum spin Hall statewhen they applied a magnetic field with an in-plane orientation.
but for our purposes here we can think of it as an electric motor. The MR scanner acts as the stator and generates propulsive torques on an actuator rotor containing the ferroelectric material.
To generate maximum torque, the smaller gradient coils (as opposed to the large static field of the MRI) need to be put under closed loop control,
steers a catheter through the vasculature by bending it at various control points that react to the magnetic field.
Assembling several tapes as a stack (while leaving air gaps) allows rapid moisture transport to and from the spores,
Prakash decided to build a rotating magnetic field that could act as clock to synchronize all the droplets.
they turned on the magnetic field. Every time the field flips, the polarity of the bars reverses, drawing the magnetized droplets in a new, predetermined direction.
Ultimately, Prakash built a rotating magnetic field to synchronize the flow of all the droplets in a precisely timed manner,
They then surrounded the device with a series of large electromagnetic coils that, when turned on induce a magnetic field in the iron bars.
As this magnetic field has its polarity alternately and continuously changed so too there is a change in the induced magnetic field of the iron bars,
and the magnetized water droplets are drawn around the circuit. Each alternation of the electromagnetic field amounts to one clock cycle,
and each drop moves exactly one step onward with each of these cycles. To observe the process,
dramatically increases its resistance in a magnetic field. The material could find use in faster, higher-capacity hard drives and other electronic components.
"The faster the electrons in the material move, the greater the Lorentz force and thus the effect of a magnetic field,"explains study lead author Binghai Yan.
to generate a rotating magnetic field that makes it possible for devices to receive power from any direction.
but things stray from the norm at the bloated seat tube, which houses the battery and electric motor drive.
#Earth's magnetic field may be more than 750 million years older than previously thought The Earth's magnetic field is crucial to life on the planet.
who was one of the researchers responsible for the previous-best estimate of the age of Earth's magnetic field (3. 2 to 3. 45 billion years).
A substance called magnetite that lies within the zircon crystals contains information about the magnetic field record at the time the minerals cooled from their molten state a process that took over a billion years.
The magnetic data the researchers found embedded in the ancient magnetite suggests that the Earth had a magnetic field at least 750 million years earlier than previously thought.
which is the heat release mechanism in the Earth's liquid inner core that generates the magnetic field,
also draws more parallels to Mars. Our red neighbor is thought to have developed a magnetic field shortly after its formation,
Others, like pole-top transformers, may be right next to power lines, but can effectively use that electricity to run digital devices,
smooth motor control that people have over their natural limbs. Now, a team of researchers says the members have solved part of the problem of smooth motor control by connecting an artificial limb to a different part of the brain.
Previous designs for mind-controlled prostheses linked the artificial limb to either the person's motor cortex or the individual's premotor cortex
you find fine motor control difficult, "he said. Dan Moran, associate professor of biomedical engineering at Washington University in St louis, said he was a bit skeptical that the new prosthesis provided any finer motor control than already-developed methods of connecting with bionic arms through motor and premotor cortexes.
But the new prosthesis was successful in that"they are decoding both the movement's trajectory,
who studies motor control and prostheses but was involved not in the new research. In the new prosthesis"
The key was using a rotating magnetic field, like a clock. The core of the new microfluidic chip,
Next, the researchers turned on a rotating magnetic field. Each time the magnetic field reversed, the bars flipped, drawing the magnetized droplets along specific directions,
the researchers said. Each rotation of the magnetic field was very much like a cycle on a clock for instance,
a second hand making a full circle on a clock face. The rotating magnetic field ensured that every droplet ratcheted precisely one step forward with each cycle, moving in perfect synchrony.
A camera recorded the movements and interactions of all the droplets. The presence of a droplet in any given space represents a one in computer data
This material's electronic properties can be controlled by a magnetic field. The researchers synthesized nanoparticles of bismuth ferrite
an electric generator capable of powering a pair of LED LIGHTS, and a miniature toy"car"that seemingly moves with miraculous efficiency.
This kinetic energy is converted then into electricity via an alternator that multiplies the frequency of the mast oscillation to improve the energy-gathering efficiency.
and created a pump that moves fluid using vibration instead of a rotor. When a fluid is squeezed
and applying very large magnetic fields to them, "says Sanchez-Yamagishi, who carried out measurements at the National High Magnetic field Laboratory in Tallahassee, Fla.
The lab features the largest continuous magnet in the world, 45 Tesla, which is about 10,000 times the strength of a refrigerator magnet.
"which showed that having a component of the applied magnetic field in the graphene plane forced electrons at the edge of graphene to move in opposite directions based on their spins.
and the samples are exposed to a large out-of-plane magnetic field, they exhibit electronic energy levels that are called"Hofstadter's butterfly,
2015iranian Researchers Prolong Life of Steel Armatures in Concrete Structures January 9th, 201 2
#Super-resolution microscopes reveal the link between genome packaging and cell pluripotency: A study using super-resolution microscopy reveals that our genome is packaged not regularly
May 27th, 2015fine-tuned molecular orientation is key to more efficient solar cells May 26th, 2015cancer Iranian Scientists Use Magnetic field to Transfer Anticancer Drug to Tumor Tissue May 24th,
Scientists Use Magnetic field to Transfer Anticancer Drug to Tumor Tissue May 24th, 2015discoveries Who needs water to assemble DNA?
These new phenomena rely on the transport of thermal energy, in contrast to the conventional application of magnetic fields, providing a new,
and enables the manipulation of nanomagnets with spin currents rather than magnetic fields, "explained Gyung-Min Choi,
If you wrapped one up into a sphere, its magnetic fields would point away in all different directions
size, and structure to facilitate desired interactions with light, electrical or magnetic fields, or chemical environment to provide unique functionality in a wide range of applications from energy to medicine.
This technique could be important in the development of devices that are highly sensitive to magnetic fields,
This required very complicated sample preparation and the magnetisation could only be determined indirectly through the resulting distribution of the magnetic field."
Knowledge of the magnetisation is prerequisite for improving the sensitivity of magnetic field detectors.""Sensors for weak magnetic fieldsthe new method could be of interest to anyone involved with extremely small magnetic features within small volumes,
Procedures like magnetoencephalography depend on externally detecting very weak magnetic fields created by the electrical activity of individual nerve cells-using appropriately sensitive detector r
and then were exposed to a magnetic field. The magnets brought the aapcs and their receptors closer together
The magnetic field of the column activated the T cells, which were washed then off into a nourishing broth,
#Researchers boost wireless power transfer with magnetic field enhancement Wireless power transfer works by having a transmitter coil generate a magnetic field;
a receiver coil then draws energy from that magnetic field. One of the major roadblocks for development of marketable wireless power transfer technologies is achieving high efficiency."
the researchers were able to significantly enhance the magnetic field, increasing its efficiency.""We realized that any enhancement needs to not only increase the magnetic field the receiver'sees,
'but also not siphon off any of the power being put out by the transmitter, "Ricketts says.""The MRFE amplifies the magnetic field
while removing very little power from the system.""The researchers conducted an experiment that transmitted power through air alone, through a metamaterial,
The detection technique is based on recording the remnant magnetic field of a contaminant using SQUID sensors.
In the process, a strong magnetic field is applied to food to magnetize the metal fragments inside,
can be detected by sensing their magnetic fields using SQUID sensors. This method is advantageous in the sense that it is both safe
Magnetic fields have strong affinities to this iron-nickel alloy. Thus, magnetic fields around the sensor are concentrated in the walls of this box."
"In experiments, the developed system was able to clearly detect a steel ball with a diameter as small as 0. 3 mm.
when placed in a magnetic field and generate negligible amounts of wasteful heat during energy harvesting, has been discovered by researchers at Temple University and the University of Maryland.
In the 1840s, physicist James Prescott Joule discovered that iron-based magnetic materials changed their shape but not their volume when placed in a magnetic field.
'that show a large volume change in magnetic fields,"said Chopra.""Moreover, these non-Joulian magnets also possess the remarkable ability to harvest
The researchers found the thermally treated materials contained never before seen microscopic cellular-like structures whose response to a magnetic field is at the heart of non-Joulian magnetostriction."
. and a team of engineers at the Wyss Institute for Biologically Inspired Engineering and Harvard John A. Paulson School of engineering and Applied sciences (SEAS) could some day help people suffering from loss of hand motor control to regain some of their daily
become frustrating and nearly impossible feats due to reduced gripping strength and motor control in the hand.
a magnetic field guides the plasma and filters out any particles of dirt. The laser arc method can be used to deposit very thick ta-C coatings of up to 20 micrometers at high coating rates.
when the material is exposed to a magnetic field. This giant magnetoresistance, which is responsible for the large storage capacity of modern hard discs,
together with colleagues from the High Magnetic field Laboratories at the Helmholtz-Zentrum Dresden-Rossendorf and at the Radboud University in The netherlands, published the new findings on niobium phosphide in the journal Nature Physics.
Modern hard discs utilize this phenomenon to significantly alter the resistance of a material by exposing it to a magnetic field.
The resistance of niobium phosphide changes so dramatically in a magnetic field, because the charge carriers are deflected by a phenomenon known as the Lorentz force.
This force causes an increasing percentage of electrons to start flowing in the rongdirection as the magnetic field is ramped up,
the greater the Lorentz force and thus the effect of a magnetic field, explains Binghai Yan, a researcher at the Max Planck Institute for Chemical Physics of Solids in Dresden.
For their investigations, the scientists used the Dresden High Magnetic field Laboratory, as well as the High Field magnet Laboratory at Radboud University in Nijmegen, Netherlands,
When a current passes through an inductor, it generates a magnetic field which in turn resists any change in the current.
size, and structure to facilitate desired interactions with light, electrical or magnetic fields, or chemical environment to provide unique functionality in a wide range of applications from energy to medicine.
Extreme experimental conditions such as high magnetic fields and cryogenic temperatures(-238 degrees Fahrenehit and below) are required usually to get even a small number of spins to line up.
and seen in the image, even with a high magnetic field applied. Using their new technique, Awschalom and his associates aligned more than 99 percent of spins in certain nuclei in silicon carbide (Sic).
Equally important, the technique works at room temperature--no cryogenics or intense magnetic fields needed. Instead, the research team used light to"cool"the nuclei.
The beads are put in motion by an external magnetic field that causes each of them to rotate.
By controlling the magnetic field, Kim can direct the speed and direction of the microswimmers. The magnetism involve also allows the researchers to join separate strands of microswimmers together to make longer strings,
We were also able to measure magnetic fields with a magnetic bead with extremely high precision,
The sensors could also be useful along high voltage lines or in transformer substations. Electric fields
when an external magnetic field is removed, this discovery is unexpected and challenges current theories for the SSE.
They generate no magnetic field, produce no magnons, and there appears to be no way for the spins to communicate with one another.
and aligned beautifully with the Earth magnetic field lines, like aurorae. e realised we may be onto something big.
They flow in these tubular structures that are aligned with the Earth magnetic field. And they can then move of their own accord.
but we didn't have the delicate touch required to control magnetic fields precisely enough to levitate smaller objects."
After carrying out a lot of research, Prakash has built a rotating magnetic field to coordinate with the flow of droplets in a timely manner and acts as a clock."
magnetic fields can pass right through it without a problem. But if you then cool the superconductor down
it gets"stuck"on the magnetic field lines that were passing through it, as if it were caught in a magnetic spiderweb.
the head of the Lawrence Berkeley National Lab's Superconducting Magnet Group, leaving the superconductor embedded in the magnetic field at that particular location.
A cross-section of a high-temperature superconductor (blue rectangle)" embedded"in a magnetic field (black lines. The magnetic channels through the superconductor are called"quantum vortices."
all you need to do is embed the superconductor in the magnetic field a couple of inches above some kind of magnetic surface.
spawning miniature magnetic fields that work to the superconductor in place. These eddy currents even oppose gravity,
pushing off of the surface's magnetic field to keep the superconductor floating in midair. In normal conducting material such as copper,
levitation happens when the superconductor interacts with an outside magnetic field. And this is where Lexus is giving us a little movie magic.
then we need an outside magnetic field for the hoverboard to coast on. This is where Lexus'"permanent magnets"come in.
"setting up a magnetic field powerful enough to support both board and, Lexus promises, a rider.
We made the discovery by applying a magnetic field and looking for undulations in sample properties such as the resistance
when we placed a small sample of the insulating material on a cantilever in a magnetic field,
But then they came up with the idea of a rotating magnetic field. very time the field flips,
when it's exposed to a magnetic field. Known as giant magnetoresistance, this property is crucial to achieving the large storage capacity we've come to enjoy in our hard drives,
When materials with giant magnetoresistance are exposed to a magnetic field, they significantly alter their electronic resistance.
The material has such incredible magnetoresistance because of another interesting property-its electrons are superfast, with a top speed of around 300 km/s. In a magnetic field,
which causes an increasing percentage of electrons to flow in the'wrong'direction as the magnetic field becomes stronger."
"The faster the electrons in the material move, the greater the Lorentz force and thus the effect of a magnetic field,"explains Binghai Yan, one of the lead researchers from the Max Planck Institute for Chemical Physics of Solids
After writing a quantum state onto the nuclear spin of the europium using laser light the team subjected the crystal to a combination of a fixed and oscillating magnetic fields to preserve the fragile quantum information.
#Preventing transformer explosions Transformer failures have cost human lives when things have gone seriously wrong says Hkon Nordhagen a materials specialist at SINTEF in Trondheim Norway the largest independent research organisation in Scandinavia.
Large oil filled transformers are found in all power and switching stations as well as in many large buildings.
Today transformers are installed in stiff steel tanks. The risk of explosions can be reduced if the industry changes to soft housings that absorb energy in the same way as modern car bodies he says.
The idea of using automotive industry technology in transformer housings has led to a pilot project in which SINTEF's materials and electricity experts are collaborating.
All large transformers use oil for insulation and cooling as this greatly reduces energy losses and improves reliability compared to dry type transformers.
The increasing focus on energy efficiency actions might also enforce a substitution of many smaller dry isolated transformers with oil filled transformers.
Statistics suggest that internal failure will occur on average in about 15 of Norway's 3000 transformers every year.
The arc which occurs in such situations makes the oil evaporate and form combustible gasses.
and extremely rapid pressure build up in the transformer tank. If the tank ruptures combustible gases will leak out.
and any combustible materials in the vicinity of the transformer can catch fire. The fire may also be fed with oil from the tank.
#Transformers are equipped with relay protection that disconnect them from the grid within a few power cycles
#Additionally transformer tanks are reinforced by means of welded steel beams in order to make them withstand pressure rises
On one hand the transformer tanks are able to withstand more pressure than they could have done without the reinforcement on the other the extra stiffness means that they cannot expand
Our idea is to design transformer tanks in such a way that they expand when their internal pressure increases without risking that major rises in tension
If such an expansion is allowed there will be more time available for the transformer to be disconnected from the grid before rupture occurs.
The aim of the recently launched transformer safety pilot project is to pave the way for a large-scale competence-building main project.
With better knowledge and new mathematical models we will be able to observe the relationships between the physics of electric arcs the transformer tank and the electrical protection system.
This method uses magnetic fields to break the time-reversal symmetry with certain specialized garnet and ferrite materials.
Magnetic fields are also sources of interference in many applications such as cold atom microsystems. These constraints have deterred availability of Faraday effect isolators for on-chip optical systems till date.
and enables the manipulation of nanomagnets with spin currents rather than magnetic fields, "explained Gyung-Min Choi,
Eventually, Prakash decided to build a rotating magnetic field that could act as clock to synchronize all the droplets.
Prakash realized that a rotating magnetic field might do the trick. Katsikis and Prakash built arrays of tiny iron bars on glass slides that look something like a Pac-Man maze.
Next, they turned on the magnetic field. Every time the field flips, the polarity of the bars reverses, drawing the magnetized droplets in a new, predetermined direction, like slot cars on a track.
Combined with the fact that the magnetic field can control millions of droplets simultaneously this makes the system exceptionally scalable."
Coupled with the unique properties of hard x-rays, namely penetration of complex environments and operation in electric and magnetic fields, such optics will enable highest-resolution imaging of systems under in-situ and in-operando conditions,
when the material is exposed to a magnetic field. This giant magnetoresistance, which is responsible for the large storage capacity of modern hard discs,
Modern hard discs utilize this phenomenon to significantly alter the resistance of a material by exposing it to a magnetic field.
The resistance of niobium phosphide changes so dramatically in a magnetic field, because the charge carriers are deflected by a phenomenon known as the Lorentz force.
This force causes an increasing percentage of electrons to start flowing in the"wrong"direction as the magnetic field is ramped up,
the greater the Lorentz force and thus the effect of a magnetic field,"explains Binghai Yan, a researcher at the Max Planck Institute for Chemical Physics of Solids in Dresden.
For their investigations, the scientists used the Dresden High Magnetic field Laboratory, as well as the High-Field magnet Laboratory at Radboud University in Nijmegen, Netherlands,
size, and structure to facilitate desired interactions with light, electrical or magnetic fields, or chemical environment to provide unique functionality in a wide range of applications from energy to medicine.
temperature, chemicals, electric field or magnetic field. These various stimuli can be used to make the materials change colour,
which a magnetic field induces a Lorentz force on moving electric charge carriers, leading to deflection and a measurable Hall voltage.
Arraythe research team used the Dipole Coil Resonance System (DCRS) to induce magnetic fields, which was developed by the team in 2014 for inductive power transfer over an extended distance.
in order to generate rotating magnetic fields, which was embedded in the Tx's flat platform. This has made it possible for mobile devices to receive power from any direction.
In addition, the DCRS works at a low magnetic field environment. Based on the magnetic flux shielding technology developed by the research team,
Other approaches involve using magnetic fields to control the plasma sheath or injecting water or other liquids into the plasma sheath to make it more permeable to radio signals,
The devicesperformance was characterized in part using optical microscopy in a magnetic field at the CFN, performed by CFN staff scientist Mircea Cotlet, Luozhou Li,
multi-rotor UAV (Unmanned aerial vehicle) that uses its own structural elements to store fuel. e realized that the structures of these drones were hollow inside,
The lightweight lithium-polymer hybrid fuel cell that converts the hydrogen gas into electricity to power the rotors was developed by a sister company,
me great pleasure to be part of the solution for improving paralyzed patientslives. part of the brain that controls intuitive movement planning could be key to improving motor control in paralyzed patients with prostheticsneural prosthetic devices
When the researchers applied a magnetic field, they observed breaking of the electron pairs one at a time. A theory of electron pairing without formation of a superconducting state was published first by David M. Eagles in 1969.
These images show differential conductance through the quantum dot as a function of the gate voltage that controls the number of electrons in the dot (x-axis) and the applied magnetic field (y-axis).
These new phenomena rely on the transport of thermal energy, in contrast to the conventional application of magnetic fields, providing a new,
and enables the manipulation of nanomagnets with spin currents rather than magnetic fields, explained Gyung-Min Choi,
Its motions are controlled by external magnetic fields. he entire walking motion is embedded into the mechanics of the robot body
the proper application of a magnetic field to the permanent magnet on its back causes its body to flex.
Then, another sequence of magnetic fields causes the robot body to twist slightly which breaks the front feet adhesion,
If you wrapped one up into a sphere, its magnetic fields would point away in all different directionso they stay in neat little packages
ith adducted rotors you immediately not only protect people and property if you were to bump into them,
Dipole Coil Resonance System (DCRS) The research team used the Dipole Coil Resonance System (DCRS) to induce magnetic fields,
in order to generate rotating magnetic fields, which was embedded in the Tx flat platform. This has made it possible for mobile devices to receive power from any direction.
In addition, the DCRS works at a low magnetic field environment. Based on the magnetic flux shielding technology developed by the research team
ESR works by combining a magnetic field with microwave energy, which together, get molecular bonds vibrating in telltale ways.
They generate no magnetic field, produce no magnons, and there appears to be no way for the spins to communicate with one another.
Alternatively, Edgerton speculates it may be possible early after an injury for noninvasive stimulation to help patients achieve a certain level of motor control that then allows them to continue to improve with physical rehabilitation
this technique could be important in the development of devices that are highly sensitive to magnetic fields,
Furthermore, the magnetisation could only be determined indirectly through the resulting distribution of the magnetic field. ur process enables you to map the magnetisation in directly in 3d.
Knowledge of the magnetisation is prerequisite for improving the sensitivity of magnetic field detectors, said Kronast.
such as those developing more sensitive devices for medical imaging as procedures-including magnetoencephalography-depend on externally detecting very weak magnetic fields created by the electrical activity of individual nerve cells. l
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