and propagate magnetic fields through the body, the wearable device needs to be circular in nature (like the coil shown in the image above),
By sending data via magnetic fields directly through our bodies, however, path loss can be cut down by a huge amount.
The researchers say path loss using magnetic field human body communication is more than 10 million times lower than that of Bluetooth radios. his technique,
They say that ultra-low-power communication systems in wearable devices will transmit signals of much less power than things like MRI SCANNERS and wireless implant devices, with magnetic fields passing freely and harmlessly through biological tissue.
magnetic field human body communication prevents any kind of digital eavesdropping, as the signals are contained largely to your body.
Another possible application is in sensors that measure magnetic fields l
#Watch: Paralysed man walks again via brain waves rerouted to his legs A paraplegic man who was paralysed for five years has walked again on his own two feet,
which is associated with the electron tiny magnetic field, said Menno Veldhorst, the lead author of the research,
instead of using pulses of oscillating magnetic fields, "explained UNSW's Dr Arne Laucht, postdoctoral researcher and lead author of the study.
which can be used in the manufacture of magnetic field sensors. VTT's third application trial involved the prevention of microwave reflection.
Its simplified control system uses power converters to allow connection of a variety of power sources to a small, high-frequency transformer.
an associate professor of electrical engineering and computer sciences, has found that a slight tilt of the magnets makes them easy to switch without an external magnetic field.
"Creating and switching polarity in magnets without an external magnetic field has been a key focus in the field of spintronics.
Generating a magnetic field takes power and space, which is why magnets have not yet been integrated onto computer chips.
In past research Salahuddin and his colleagues found that directing electrical current through the rare metal tantalum creates polarity in magnets without an external magnetic field.
"We found that by tilting the magnet--just 2 degrees was enough--you get all the benefits of a high-density magnetic switch without the need for an external magnetic field,
#Magnetic fields provide a new way to communicate wirelessly Electrical engineers at the University of California, San diego demonstrated a new wireless communication technique that works by sending magnetic signals through the human body.
"In this study, electrical engineers demonstrated a technique called magnetic field human body communication, which uses the body as a vehicle to deliver magnetic energy between electronic devices.
An advantage of this system is that magnetic fields are able to pass freely through biological tissues,
Researchers showed that the path losses associated with magnetic field human body communication are upwards of 10 million times lower than those associated with Bluetooth radios."
With this magnetic field human body communication system, we hope to significantly reduce power consumption as well as how frequently users need to recharge their devices,
Another potential advantage of magnetic field human body communication is that it could offer more security than Bluetooth networks.
On the other hand, magnetic field human body communication employs the human body as a communication medium, making the communication link less vulnerable to eavesdropping.
Demonstrating magnetic communication with a proof-of-concept prototype The researchers built a prototype to demonstrate the magnetic field human body communication technique.
These coils serve as sources for magnetic fields and are able to send magnetic signals from one part of the body to another using the body as a guide.
Researchers noted that a limitation of this technique is that magnetic fields require circular geometries in order to propagate through the human body.
Devices like smart watches, headbands and belts will all work well using magnetic field human body communication
a rare genetic disorder affecting a region of the brain involved in motor control and which leads to difficulty in coordinating complex movements,
a rare genetic disorder affecting a region of the brain involved in motor control and which leads to difficulty in coordinating complex movements,
Besides its potential use in information transfer, the metamaterial might also prove useful in data storage or for sensors that measure magnetic fields.
added a plastic spacer undetectable to the participant that weakened the magnetic field enough to prevent the generation of phosphenes.
which is associated with the electron's tiny magnetic field, "he added. Dzurak noted that that the team had patented recently a design for a full-scale quantum computer chip that would allow for millions of our qubits,
High performance magnetic sensors in demand When an external magnetic field is applied to certain materials a change in electrical resistance, also known as magnetoresistance, occurs as the electrons are deflected.
The discovery of magnetoresistance paved the way for magnetic field sensors used in hard disk drives and other devices,
In the search for an ideal magnetoresistance sensor, researchers have prized the properties of high sensitivity to low and high magnetic fields, tunability,
of which can be controlled by the magnetic field. The researchers characterised the new sensor by testing it at various temperatures, angles of magnetic field,
and with a different pairing material. Dr Kalon said, "We started by trying to understand how graphene responds under the magnetic field.
We found that a bilayer structure of graphene and boron nitride displays an extremely large response with magnetic fields.
This combination can be utilised for magnetic field sensing applications.""Compared to other existing sensors, which are made commonly of silicon and indium antimonide,
the group's hybrid sensor displayed much higher sensitivity to magnetic fields. In particular, when measured at 127 Degree celsius (the maximum temperature
which most electronics products are operated at), the researchers observed a gain in sensitivity of more than eightfold over previously reported laboratory results and more than 200 times that of most commercially available sensors.
and finding applications as thermal switches, hard drives and magnetic field sensors. Our technology can even be applied to flexible applications,"added Assoc Prof Yang.
#Researchers develop 3-D printing method for creating patient-specific medical devices A team of researchers at Northeastern University has developed an innovative 3-D printing technology that uses magnetic fields to shape composite materials
They then apply ultralow magnetic fields to individual sections of the composite material--the ceramic fibers immersed in liquid plastic--to align the fibers according to the exacting specifications dictated by the product they are printing."
"Magnetic fields are very easy to apply, "says Erb.""They're safe, and they penetrate not only our bodies--think of CT SCANS--but many other materials."
Better algorithms and more sensitive electrodes might yield finer motor control. And advances in brain-machine interfaces should make implants less invasive.
Incoming plasmons, created by laser light at one end of the array, travel though this air gap between the bridges and the bottom gold layer.
an associate professor of electrical engineering and computer sciences, has found that tilting magnets slightly makes them easy to switch without an external magnetic field.
and switching polarity in magnets without an external magnetic field has been a key focus in the field of spintronics.
Generating a magnetic field takes power and space, which is why magnets have not yet been integrated onto computer chips.
In past research, Salahuddin and his colleagues found that directing electrical current through the rare metal tantalum creates polarity in magnets without an external magnetic field.
but that vertical orientation negated the switching effects of tantalum. e found that by tilting the magnet just 2 degrees was enough you get all the benefits of a high-density magnetic switch without the need for an external magnetic field,
or magnetic fields to control whether the interference is constructive or destructive. This new mechanism is a general property of ultracold chemical reactions
The aurora the scientists observed from LSR J1835+3259 appears powered by a little-understood dynamo process similar to that seen on larger planets in our Solar system.
which causes the Earth auroral displays the planet magnetic field interacting with the solar wind. hat we see on this object appears to be the same phenomenon wee seen on Jupiter, for example,
and that magnetic field creates a voltage in the sensor coil when the two coils are close together a process called mutual inductance.
#A new look at superfluidity MIT physicists have created a superfluid gas, the so-called Bose-Einstein condensate, for the first time in an extremely high magnetic field.
The magnetic field is a synthetic magnetic field, generated using laser beams, and is 100 times stronger than that of the world strongest magnets.
Within this magnetic field, the researchers could keep a gas superfluid for a tenth of a second just long enough for the team to observe it.
to create and maintain a superfluid gas long enough to observe it at ultrahigh synthetic magnetic fields. oing to extremes is the way to make discoveries,
When charged particles are exposed to magnetic fields, their trajectories are bent into circular orbits, causing them to loop around and around.
The higher the magnetic field, the tighter a particle orbit becomes. However, to confine electrons to the microscopic scale of a crystalline material,
a magnetic field 100 times stronger than that of the strongest magnets in the world would be required.
their trajectories are unaffected normally by magnetic fields. Instead, the MIT group came up with a technique to generate a synthetic
ultrahigh magnetic field, using laser beams to push atoms around in tiny orbits, similar to the orbits of electrons under a real magnetic field.
In this scenario, atoms could only move with the help of laser beams. ow the laser beams could be used to make neutral atoms move around like electrons in a strong magnetic field
or loop around, in a radius as small as two lattice squares, similar to how particles would move in an extremely high magnetic field. nce we had the idea,
Kennedy says. ew perspectives to known physics After developing the tilting technique to simulate a high magnetic field,
Those images also reveal the structure of the magnetic field something that been known, but never directly visualized until now. he main accomplishment is that we were able to verify
Ketterle says. f we can get synthetic magnetic fields under even better control, our laboratory could do years of research on this topic.
which uses a magnetic field and radio waves to produce images and combined it with a special chemical contrast solution.
Because they are important for motor control, this damage can result in substantial motor deficits, so it is highly desirable to discover more about this area,
#High-sensitivity, high resolution magnetocardiography (MCG) for use at room temperature developed Researchers at Tohoku University have succeeded in developing a sensor for the living body that can detect the bio-magnetic field with high sensitivity
Inc. succeeded in detecting the heart magnetic field by using the TMR device. This device enables cardiac electric activity to be measured in a nonaggressive way
In the future, a special shield room for detecting the bio-magnetic field would be unnecessary because this device has a large field range.
prone to breaking and susceptible to interference from electric motors and other electromagnetic devices. But a single optical fiber can contain several sensors;
such as a magnetic field, would not be detectable by an outside observer and would not disrupt other magnetic fields. o do this,
you would construct a material that surrounds the object in such a way that currents go around it.
Uhlmann theoretical device for cloaking magnetic fields would have practical applications, such as in devices that use optical data transmission.
Another real-world use for magnetic field cloaking would be medicine. Magnetic resonance imaging or MRI, utilizes magnetic fields. A cloaking device for magnetic fields could make it easier for doctors to utilize MRI during operations by idingthe field from surgical instruments. hat just one application.
But who knows what other applications there could be for this theory, which works for almost any kind of wave, said Uhlmann.
The primary reason this theory seemed so far from practice centered on the physical and mathematical constraints of the cloaking field.
Rendering a magnetic field invisible to outside observers but without disrupting the inherent properties of that field would require materials that do not exist in the natural world.
The metamaterial had just the right properties to cloak a specific magnetic field encased within the sphere,
and discovered that the magnetic field within the sphere could be rendered invisible to outside detection. hat essentially
which exert powerful magnetic fields to compress high-temperature plasmaoiling balls of charged particles that fuse to form helium, releasing large amounts of energy in the process.
The magnetic field that holds the ring together is generated by the plasma itself technique known as a field-reversed configuration.
the ARC reactor can achieve magnetic fields with much higher energyhus enabling a reactor design much smaller than other tokamak-based machines.
Increasing the amplitude of the surrounding magnetic field raises the amount of fusion power produced in the plasma to the fourth power dramatic increase that could lead to a commercial prototype in a matter of years,
if you raise the magnetic field to very high levels, he says, ut the electromagnets had to be coppero superconductor could tolerate that magnetic field.
Now the advent of advanced superconductor tapes could enable a compact reactor that produces fusion continuously.
Creating a magnetic field for long-term magnetic memory requires power and space, which is why up until now computational
Previously, Salahuddin and his colleagues had discovered that passing a current through the rare metal tantalum creates polarity in magnets without an external magnetic field.
they could be aligned in close proximity yet retain the desired properties. e found that by tilting the magnet-just 2 degrees was enough-you get all the benefits of a high-density magnetic switch without the need for an external magnetic field,
which genersates its own magnetic field, one of the permanent magnets attracts it while the other repels it.
Aeristech CEO. o other motor control arrangement is able to deliver at this pressure with such a high efficiency. he company has yet to release specific technical details,
It hovered thanks to"Magnetic field Architecture"(MFA), a fancy name for what the company's founder,
The hover engine essentially creates"swirls of electricity"that form magnetic fields both within the hover engine and the conductive surface.
#Researchers develop worlds thinnest electric generator Researchers from Columbia Engineering and the Georgia Institute of technology report today that they have made the first experimental observation of piezoelectricity
and the piezotronic effect in an atomically thin material molybdenum disulfide (Mos2) resulting in a unique electric generator
#Earths magnetic field could flip within a human lifetime Imagine the world waking up one morning to discover that all compasses pointed south instead of north.
Earth's magnetic field has flipped--though not overnight--many times throughout the planet's history. Its dipole magnetic field like that of a bar magnet remains about the same intensity for thousands to millions of years but for incompletely known reasons it occasionally weakens
and presumably over a few thousand years reverses direction. Now a new study by a team of scientists from Italy France Columbia University and the University of California Berkeley demonstrates that the last magnetic reversal 786000 years ago actually happened very quickly in less than 100 years--roughly a human lifetime.
Flip could affect electrical grid cancer ratesthe discovery comes as new evidence indicates that the intensity of Earth's magnetic field is decreasing 10 times faster than normal leading some geophysicists to predict a reversal within a few
And since Earth's magnetic field protects life from energetic particles from the sun and cosmic rays both
Dating ash deposits from windward volcanoes The new finding is based on measurements of the magnetic field alignment in layers of ancient lake sediments now exposed in the Sulmona basin of the Apennine Mountains east of Rome Italy.
and Volcanology measured the magnetic field directions frozen into the sediments as they accumulated at the bottom of the ancient lake.
Unstable magnetic field preceded 180-degree flipwhether or not the new finding spells trouble for modern civilization it likely will help researchers understand how
and why Earth's magnetic field episodically reverses polarity Renne said. The magnetic record the Italian-led team obtained shows that the sudden 180-degree flip of the field was preceded by a period of instability that spanned more than 6000 years.
Earth's radiation belts are regions in near-Earth space that contain vast quantities of solar energetic electrons trapped there by Earth's magnetic field.
because the parallel alignment of adjacent electron spins in the iron atoms generates a strong internal magnetic field.
and exclude magnetic field lines from their interiors. But LMU chemists have discovered a new material in
In cooperation with physicists from the Technical University in Dresden and the Paul Scherrer Institute in Villingen (Switzerland) the LMU researchers have demonstrated that the magnetic field generated by the (Life) OH layers penetrates into the interleaved superconducting layers--spontaneously and in the absence of externally applied fields.
Ali applied a magnetic field to a sample of WTE2 one way to kill superconductivity if present and saw that its resistance doubled.
which is the change in resistance as a material is exposed to stronger magnetic fields. He noticed the magnetoresistance kept going up
The researchers then exposed WTE2 to a 60-tesla magnetic field close to the strongest magnetic field humans can create
Electronic information storage is dependent on the use of magnetic fields to switch between distinct resistivity values that correlate to either a one or a zero.
The larger the magnetoresistance the smaller the magnetic field needed to change from one state to another Ali said.
Today's devices use layered materials with so-called giant magnetoresistance with changes in resistance of 20000 to 30000 percent when a magnetic field is applied.
when the magnetic field is applied in a certain direction This could be very useful in scanners where multiple WTE2 devices could be used to detect the position of magnetic fields Ali said.
#More efficient transformer materials Almost every electronic device contains a transformer. An important material used in their construction is electrical steel.
Transformers convert the standard voltage from the wall outlet into the lower voltages required by electronic devices.
Similar but more powerful transformers are used in electricity substations to convert the high voltages of the transmission grid into the standard AC power supply delivered to households.
All transformers have the same basic structure: a pair of iron cores around which wires of different lengths are wrapped.
These are the transformer coils one of which generates an oscillating magnetic field while the other converts this magnetic field into a voltage.
To minimize the energy loss associated with this process special types of iron-silicon alloy known as electrical steel are used to make the core.
However unlike transformer steel these materials do not have oriented a grain structure and therefore possess different magnetic properties.
In high-performance machines such as vehicle engines which are designed to run at high rotational speeds energy loss can be reduced by a few percentage points In high-torque electric motors such as those used to operate pumps the reduction in energy loss can be as high as twentyfive
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. e can keep making it smaller and smaller
When a current passes through an inductor, it generates a magnetic field, which in turn resists any change in the current.
#Argentine greenhouse robot brings automation to the masses BUENOS AIRES--The new Trakür agricultural robot does not have the brains, firepower or complexity of one of the Transformers,
In standard turbine design, wind energy is used to turn the unit's rotors, which then converts this type of power into electricity through powering machinery
because the paramagnet doesn generate a magnetic field. he spins in the system were not talking to each other.
Expect to see some of the $500 billion a year currently spent on college tuition winding up in Silicon valley,
when we notice them doing their jobs. can go on Youtube without them winding up, making a bunch of noise!
That would allow the mirrors to be reprogrammed using a magnetic field to rapidly display points at different depths fast enough to fool the eye
many will surely be left wondering whether the future looks more like Silicon valley high-tech dynamo driving economic prosperity and wealth inequality at oncer,
when a magnetic field is applied to vary the stiffness of the joint as a person walks.
Most research efforts use a method that tries to contain hot plasma within magnetic fields in a doughnut-shaped device called a tokamak.
This approach tries to contain plasma by reflecting particles from high-density magnetic fields to low-density ones.
tetrahedrons and even a three-dimensional spiral structure using magnetic drops in a magnetic field. This kind of behaviour raises an interesting question.
possibly in the presence of an electric or magnetic field to align the clusters appropriately. Shen and co say that it should be possible to change the droplet chemistry in such a way to manipulate the physical properties of the bulk material in ways that are currently difficult or impossible to do.
The group has developed a new method of sending magnetic fields well below skin level to power devices that would
which a current running through a coil of wire generates a magnetic field that then induces a current in a nearby device.
When they send current through the plate that pattern produces a magnetic field capable of propagating through biological material without decaying over a short distance.
which uses coils to transfer power over small distances via a magnetic field. This is the method used to recharge electric toothbrushes, for example.
an alternator in the base of the device then converts the mechanical movement into electricity.
an alternator in the base of the device then converts the mechanical movement into electricity.
The landbased housing contains an electrical transformer and is less than a cubic meter in volume, while the sail is 3. 8 m in diameter
The landbased housing contains an electrical transformer and is less than a cubic meter in volume, while the sail is 3. 8 m in diameter
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."
When a current passes through an inductor, it generates a magnetic field, which in turn resists any change in the current.
and light beam transformers",explains Asadchy y
#FLIR GF320 Thermal Camera for Offshore Oil & Gas Leak Detection The FLIR GF320 thermal camera from FLIR Systems is a preventative maintenance tool purpose designed to spot leaks in piping
The droplets are suspended in a magnetic field and move certain distances as the field rotates, effectively serving as a computer clock, an essential piece of any working computer.
what under the hood apparently just a 1. 0 liter gas generator paired with a 12.2 kilowatt lithium-ion battery integrated with a rear-mounted electric motor
Norsepower Oy Ltd. shared the successful trial of its Rotor Sail Solution, a wind propulsion technology for maritime ships.
Norsepower trials confirm fuel savings of 2. 6 percent using a single small Rotor Sail on a route in the North sea.
The Norsepower Rotor Sail Solution is modernized a version of the Flettner rotor spinning vertical cylinder that harnesses wind power to propel a ship.
The rotor generates thrust for the same reason that a spinning baseball curves through the air after it thrownhe Magnus effect.
In favorable wind conditions, Norsepower Rotor Sails allow the vessel to throttle back the main engines,
Rotor Sails can be installed on new vessels or retrofitted on existing ships without requiring the vessel potentially multi-million-dollar asseto be out of service,
The Norsepower Rotor Sail Solution was installed on the 9, 700 dead weight tonnage roll-on-roll off (Roro) carrier MS Estraden.
followed by the 18-meter-high rotor during an ordinary seven-hour harbor stay. Norsepower target installation for vessels is four large rotors installed on one vessel.
With these larger installations, Norsepower forecasts substantial savings of 20 percent for vessels traveling on favorable wind routes.
In fact, with the results from the single-rotor trial Bore is already looking ahead to the opportunity of two rotors on one ship. e are proud to be the first shipowner to install the Norsepower Rotor Sail,
and demonstrate that wind propulsion technology has verifiable five-percent fuel savings on a yearly basis,
like the Rotor Sail Solution, exist today, and can be deployed and scaled quickly. odern wind systems are demonstrating measurable and meaningful fuel savings for ships.
#Flexible sensor lets humans detect magnetic fields The sensor on a soap bubble. IFW Dresden When it comes to navigating the world around us we have a lot more than just five senses.
and insects to orient themselves in the physical world by detecting magnetic fields. This includes actual location altitude
and crumpled into a tiny ball (right) IFW Dresden These ultra-thin magnetic field sensors readily conform to ubiquitous objects including human skin
When the wearer moves the sensor close to a magnetic field the sensor is shown to be operational when the LED array lights up.
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