Sentences with phrase «by electrical currents»

The MESSENGER observations and data from the two earlier Mariner 10 flybys are consistent enough to describe a dipolar field with an active electrical dynamo in which the magnetic field is produced by electrical currents flowing in an outer core of molten metal (more discussion and images from MESSENGER's January 2008 flyby).

The technique records magnetic fields produced by electrical currents that oscillate throughout the brain.

The time scale of spin currents generated by electrical currents is limited to a few nanoseconds.

«Thermal spin generation has a potential for higher efficiency than spin generation by electrical currents.

Skyrmions are stable, can have a diameter of just a few nanometres, and can be moved efficiently by electrical currents.

NiO is a promising material for spintronic devices, where signals are transmitted not by electrical currents but rather by spin waves, consisting of propagating disturbances in the ordering of magnetic materials, in a domino - like fashion.

Each element is activated by an electrical current which, when applied, heats the ink in contact with the element.

Most robotic muscles are powered by an electrical current.

When energized by electrical current, the bonded layer produces light that travels through channels in the silicon to a «modulator» that flickers the light tens of billions of times per second.

As a result, the engineered quantum dots feature nearly complete suppression of Auger effect's heat loss, and this allows for redirecting the energy released by the electrical current into the light - emission channel instead of wasteful heat.

But making use of functional MRI for imaging the brain allowed the researchers to reveal changes in activity while being stimulated, with the flow of information being potentially modulated by the electrical current.

Electrocution involves an injury or death caused by an electrical current that runs through a person's body.

An electrical burn is caused by electrical current.

Not exact matches

Widely used by doctors and physical therapists to control pain and stimulate healing by passing electrical current through affected areas, the devices cost thousands of dollars and can be tricky to use, but Rahimi experienced immediate, lasting relief the first time he used it.

He thought that wiretapping was just a new form of coerced confession — the replacement of «force and violence» by wires and electrical current.

It can be generated either by detonating explosives (the first systems developed during the 90s) or discharging electrical currents under water (current second generation).

By Sarah Olmsted Published By Roost Books Fall 2012 Description: For children, potential is limitless, curiosity is an electrical current, and every moment is open to the possibility of the unexpected.

The current offices have major structural defects, significant parts of the roof are collapsing, significant leakages in most offices, damp and mouldy walls, electrical defects have been discovered and pointed out by the Fire Service for urgent attention (please see «CO7A» attached), the building lacks disability access, is decrepit and outdated, requiring extensive work and expense to make it habitable and reflective of the office of the Electoral Commission.

New research from an international group led by Min Zhao, professor of ophthalmology and of dermatology at the University of California, Davis, shows that, in animal models of diabetes, slow healing is associated with weaker electrical currents in wounds.

«The key to this metamaterial and metadevice is vanadium dioxide, a phase change crystal with a phase transition that is triggered by temperatures created by an electric current,» said Lei Kang, research associate in electrical engineering, Penn State.

A team led by Jonathan Kelner at MIT found a way to speed things up by representing paths as electrical resistors and flow as current.

«One way to know is by understanding how electrons move around in these materials so we can develop new ways of manipulating them — for example, with light instead of electrical current as conventional computers do.»

In a small study of healthy twentysomethings the scientists showed they could make neurons more or less excitable by sending weak electrical currents through the brain's motor cortex.

They first isolated a buckyball on a metal surface with a scanning tunneling microscope (STM), which images the atomic contours of a surface by measuring changes in the electrical current that travels between the surface and an ultrasharp tip that scans across it.

An electrolyzer works by running an electrical current through water that splits it into oxygen and hydrogen.

Using heat from an external solar array, Licht, who's based at George Washington University, can raise the temperature so high that only a minute electrical current, supplied by solar photovoltaic cells, is needed to split the compounds.

This current can be tapped and amplified by the radio or television receiver, allowing power and information to be communicated over large distances without direct electrical connection.

Chua's equations suggested that a memristor's electrical resistance, or conductivity, would not be constant, like a lightbulb's, but dynamic, and determined by the history of the current that had flowed through the device.

«Electrical brain stimulation could support stroke recovery: Hand and arm training boosted by transcranial direct current stimulation.»

And the rise in electronic temperature, caused by the passing currents, in turn has a strong effect on the electrical conduction of graphene» explains Professor Mischa Bonn, Director at the MPI - P.

Two thin wires implanted in the brain may help treat Alzheimer's disease by delivering electrical current.

When energy is added to the material, either by a laser «pump» or as an electrical current, it kicks some of the electrons orbiting the molecules into higher energy states.

At the current rate of adoption, Harris said, all electrical circuits controlled by the utility could be closed to small - scale solar within six months.

Large - scale cleanup operations would also require different types of motors, perhaps driven by magnetic fields or electrical current, the authors note.

«We've proved that generating entanglement between photons emitted from an LED can be achieved by adding another peculiar physical effect of superconductivity — a resistance - free electrical current in certain materials at low temperatures.»

Because nuclear spin - controlled electrical current regulates output of light by the OLED, it provides a way to study how to make OLEDs more efficient.

«The electrical signal is thus not based on an electric current but is caused by a mechanical force,» points out Thomas Heimburg.

Until the new study, «nobody has ever shown it directly» at room temperature by turning nuclear spins to change an electrical current, he adds.

First, he created 20 - centimetre - long flexible ribbons made of a piezoelectric polymer that generates electrical currents when perturbed, either by wind or when rain drops fall on it.

The team showed that by using a powerful magnetic field and very low temperatures, below — 450 degrees Fahrenheit -LRB--- 270 degrees Celsius), they could read the state of electrons in a silicon wafer, potential qubits, using electrical current, and were able to extend the usable lifetime of those qubits dramatically.

Elizabeth Heidrich, a PhD student at Newcastle University in England and lead author of the new study, studies microbial fuel cells — devices that generate electrical current by capturing the electrons freed as bacteria break down organic matter in wastewater.

Using electrophysiological methods to measure electrical currents through cell membranes, the research group at the Institute for Physiology and Pharmacology, led by Marjan Slak Rupnik, showed that dextromethorphan extends the periods of electrical activity in beta cells.

By testing cycling time to task failure (TTF) in a group of 12 active participants in a placebo controlled study, Dr Mauger discovered that stimulating the brain by passing a mild electrical current (transcranial direct current stimulation or tDCS) over the scalp to stimulate it increased the activity of the area associated with muscle contractioBy testing cycling time to task failure (TTF) in a group of 12 active participants in a placebo controlled study, Dr Mauger discovered that stimulating the brain by passing a mild electrical current (transcranial direct current stimulation or tDCS) over the scalp to stimulate it increased the activity of the area associated with muscle contractioby passing a mild electrical current (transcranial direct current stimulation or tDCS) over the scalp to stimulate it increased the activity of the area associated with muscle contraction.

Duchenne de Boulogne found that he could artificially induce recognizable facial expressions by sending electrical currents to different groups of muscles in the face.

Most plasma cutters work best when the material being cut is a conductor, as the material can therefore complete the circuit and send the arc's electrical current back to the cutter device by means of a cable clamped to the target.

The work by Shanhui Fan, a professor of electrical engineering at Stanford, research associate Aaswath P. Raman and doctoral candidate Linxiao Zhu is described in the current issue of Proceedings of the National Academy of Sciences.

SAN FRANCISCO — The northern lights are just one manifestation of the magnetic and electrical frenzy sparked in Earth's upper atmosphere by solar storms; most of those intense currents were always to remain invisible.

The fact that the protective aluminum oxide layer is not incorporated on the outside, as often attempted by other researchers, also makes it possible to apply a broad range of materials on both sides of the solar cell and allows the maximum penetration of light in the perovskite layer and thereby the optimum utilization of electrical current.

These defects were observed by measuring tiny electrical currents created when charges that were frozen in the traps at extremely cold temperatures escape by receiving a jolt of thermal energy as the device is heated, a process called thermally stimulated current.

The most vital components of cognition, Freeman believes, are the electrical and magnetic fields, generated by synaptic currents, that constantly ripple through the brain.