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| Electrical engineering (1530) | |
| Electrical machine (737) | |
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Those fitted with magnetometers like the ones that provide your smartphone compass will transmit data about the Earth magnetic field.
all you need is two metals an anode, which is the negative electrode, such as zinc,
and a cathode, the positively charged electrode, such as copper. The acid inside the potato forms a chemical reaction with the zinc and copper,
And advanced systems can record details like how much the air conditioning is used or how hard a driver accelerates.
High Power Microwave Weaponsimagine a weapon that can knock out all the computers in a Syrian military command centre without killing a single person.
That's the idea behind high power microwave weapons which are designed to destroy electronics without causing any physical damage.
Last year, Boeing released a video of its High Power Microwave Advanced Missile Project (Champ)- a missile that essentially fries circuits by causing a surge in power.
the Air force has conducted classified work in high power microwaves for years, and some suspect it already has such weapons available.#
Replacing today's gas-guzzling engines with electric motors means cars will no longer produce harmful emissions.
"But it only takes a handful to impact your local, neighbourhood transformer.##If you would like to comment on this article
In 1917 Harold Arnold and IB Crandall of the American Telephone and Telegraph Company and Western electric Company showed that they could create sound by simultaneously passing alternating and direct currents through a very thin platinum foil.
heavy electromagnets used to excite vibrations in conventional speakers, or indeed without moving parts at all.
which Leeloo puts chicken pills into a microwave and a second later pulls out a full roast with all the trimmings.
an MIT professor of electrical engineering and computer science (EECS), in 2009. His team used that earlier version to fuse adult cells with embryonic stem cells,
Using ultraviolet and infrared rays as well as magnetic field sensors, the founder of Matsumura Engineering Co.,is targeting the fake U s. bills that are popping up in countries from South america to Asia and the Middle east.
The device was developed by team led by Aydogan Ozcan, a professor of electrical engineering and bioengineering at the Henry Samueli School of engineering and Applied science and director of the California Nanosystems Institute."
Engineers are exploring the use of 3-D printing to lay down conductive materials for electrical circuits,
and dielectrics needed for printed electronics. They can even lay down carbon nanotubes, tiny structures made of linked carbon atoms,
the ELR electric motor acts as a generator while braking, automatically recovering energy that delivered to the batteries as electricity.
In the United states, LG Electronics sells a range of stylish and innovative home entertainment products, mobile phones, home appliances, commercial displays, air conditioning systems and solar energy solutions, all under LG ife Goodmarketing theme.
Air conditioning & Energy solutions and Vehicle Components and is one of the world leading producers of flat panel TVS, mobile devices, air conditioners, washing machines and refrigerators.
The algorithms are used then with advanced signal processing techniques to reduce the amount of data that has to be sent for a given monitoring application.
forming electrical circuits. Until now, these icrochannelshave been engraved mechanically, using a sharp stylus. The primary focus of the ALPINE project was to pioneer the use of new fibre laser technology to do this engraving
Commercial fridges and freezers keep food fresh and beverages cool. They are vital to modern commerce but troublesome for the environment.
freezers and chilled vending machines filled with goods to sell. They are convenient and essential for preserving
Combined, commercial refrigerator/freezers like these are estimated to consume 85 TWH (terawatt hours) of electricity every year.
The project trademarked V-Tex technology recorded energy savings of 80-90%compared with open-front commercial refrigerators.
or simplify the mechanical gearbox normally associated with electric motors through so-called magnetic gears, an innovation that might be developed further in the project
Permanent magnet machines have a paramount importance in many other fields. Just to mention one, they are at the core of the electric generators used in all wind generators.
The project coordinated by The Chancellor, Masters and Scholars of the University of Cambridge, UK has 7 participants from 4 countries i
"We found an adaptor, or bridging molecule, which fits to an old protein and a new one.
with#391,661 In commission backing and had a particular focus on steel production in electric arc furnaces (EAF). High-strength steel alloys are particularly interesting for carmakers,
mass production of high-manganese steel grades is possible using either the blast furnace-basic oxygen converter route or the electric arc furnace route.
on the back of PROMS and EAF-PROMS, the projectsindustrial partner, Salzgitter AG steel group, decided to build the world first line for production of high-manganese steel grades based on the electric arc furnace route.
"Take the microwave oven, for example: in the 70s, people were a bit fearful about it, they thought food could be poisoned with radiation or something,
"We think this will enable researchers to develop a new generation of tiny implants designed for a wide array of medical applications"says Amin Arbabian assistant professor of electrical engineering at Stanford university.
and a robotic platform that can operate inside the powerful magnetic field created by an MRI SCANNER.
Ventilator-associated pneumonia develops in approximately 20 percent of patients in intensive care units (ICUS) who are receiving prolonged medical ventilation.
and Girish Kulkarni, a doctoral candidate in electrical engineering. The device is faster, smaller, and more reliable than its counterparts,
They then used an electric field to pull out the fat layer that had been dissolved in an electrically charged detergent
The electric field aspect was a challenge for some labs. bout half the people who tried it got it working right away,
professor of electrical engineering at University of Washington. e have shown this is possible in principle. If you can fit this sensor device into an intraocular lens implant during cataract surgery
The researchers, including Brian Otis, associate professor of electrical engineering and also of Google Inc, . and former doctoral students Cagdas Varel and Yi-Chun Shih, have filed patents on the pressure-monitoring device prototype l
The magnetic fields in magnetic resonance imaging (MRI) often disrupt either the function or safety of implanted electrical devices.
a graduate student in computer and electrical engineering at Duke university. ee trying to transfer the knowledge of the relatively few autism experts available into classrooms and homes across the country.
says Ada Poon, assistant professor of electrical engineering at Stanford university. The central discovery is an engineering breakthrough that creates a new type of wireless power transfersing roughly the same power as a cell phonehat can safely penetrate deep inside the body.
when we broadcast signals from giant radio towers, cook in microwave ovens, or use an electric toothbrush that recharges wirelessly in a special cradle next to the bathroom sink.
Speech and Signal processing in Italy, and published details simultaneously in the conference proceedings. The National institute of mental health funded the study t
Like a series of small conveyer belts, localized rotating magnetic fields move the beads and cells along specific directions etched into a track,
In standard hospital instruments the magnetization of the atomic nuclei in the human body is measured inductively using an electromagnetic coil.
The nitrogen-vacancy center is both fluorescent and magnetic making it suitable for extremely precise magnetic field measurements.
and estimated the intensity of light in the two resonators and surprisingly found an initial decrease in total intensity of the two resonators followed by an increase
and finally a rebirth of strong light intensity as the loss was increased. he loss added beyond a critical value increased the total light intensity and its distribution between the resonatorssays Bo Peng a graduate student.
The experimental system that the researchers used consists of two tiny directly coupled silica microtoroid (doughnut-shaped) resonators each coupled to a different fiber-taper coupler that aids in guiding light from a laser diode to photodetectors;
so that light can between the fibers and the resonators. Yang says the concept will work in any coupled physical system.
whose position within the evanescent field (leaked-out light) of one of the resonator was controlled by a nanopositioner that operates at a minuscule 20-nanometer resolution. hromium is used
Another nanopositioner controls the coupling strength between the resonators by tuning their distance. The loss-gain phenomenon occurs near a feature called the exceptional point
and results in recent physics studies. hen we steer the system through the exceptional point the symmetric distribution of the fields between two resonators become asymmetricozdemir says. symmetric distribution leads to field localization increasing the light intensity in one
of the resonators in this case the resonator with less loss. s a result all nonlinear processes
The design builds on existing technology and creates a magnetic field within a closed space to hold plasma in place long enough for fusion to occur allowing the hot plasma to react and burn.
There are several ways to create a magnetic field which is crucial to keeping a fusion reactor going.
The new design is known as a spheromak meaning it generates the majority of magnetic fields by driving electrical currents into the plasma itself.
because they rely on superconducting coils that circle around the outside of the device to provide a similar magnetic field.
The materialâ could be the basis for unique electric generators that are lightweight bendable stretchable #and ultimately wearable. his material#just a single layer of atoms#could be made as a wearable device perhaps integrated into clothing to convert energy from your body movement to electricity
says study leader Alan Willner, electrical engineering professor at the USC Viterbi School of engineering. Faster data transmission rates have been led achievedillner himself a team two years ago that twisted light beams to transmit data at a blistering 2. 56 terabits per secondut methods to do so rely on light to carry the data. he advantage
Magnetic field lines extend from the solar surface all the way into the corona. Moving and twisting bundles of field lines form magnetic flux tubes.
he system is turbulentthe magnetic field lines in the corona do not move in a random pattern
and the linked-together smart gadgets envisioned in the nternet of Things. he next exponential growth in connectivity will be connecting objects together and giving us remote control through the websays Amin Arbabian an assistant professor of electrical engineering at Stanford university who recently demonstrated this ant
which could provide another source of energy for certain applicationssays Shwetak Patel associate professor of computer science and engineering and of electrical engineering at the University of Washington.
That means any slight shift in an office building s air conditioning or the natural outside air temperature during the course of a day would be more than enough to activate the chemical in the bellows.
and doctoral student in electrical engineering. e provide a simple design that includes some 3d printed and off-the-shelf components.
This color filtering is done commonly using off-chip dielectric or dye color filters which degrade under exposure to sunlight
The battery sends an electric current through two electrodes that split liquid water into hydrogen and oxygen gas.
and magnetic fields. ntil now the complicated vibrations and rotations of molecules proved too difficult for such trapping.
and do it a lot of times. he slowed molecules enter a specially shaped magnetic field where opposing laser beams pass through the center of the field along three perpendicular axes.
Laser pulses generated coherent bursts of terahertz radiation through a built-in surface electric field of the indium phosphide substrate that changed due to charge transfer between the graphene and the contaminating molecules.
The foams are made by depositing copper on a surface in the presence of hydrogen and a strong electric current.
Fan is developing the sensor with Zhaohui Zhong an associate professor of electrical and computer engineering and Girish Kulkarni a doctoral candidate in electrical engineering.
if you re looking for specific patterns you can find it among all the other Wi-fi reflections in an environmentsays coauthor Joshua Smith an associate professor of computer science and engineering and of electrical engineering.
How carbyne is attached to electrodes also matters Artyukhov says. ifferent bond connectivity patterns can affect the metallic/dielectric state balance
and veins, put it in the blender and then performed several extraction steps to gently remove the protein complexes from the membrane
which requires huge amounts of energy to maintain a magnetic field with electromagnets, the new method for enriching stable isotopes, called MAGIS (magnetically activated and guided isotope separation), needs little energy due to its use of low-powered lasers and permanent magnets.
For instance, removing oxygen from the graphene oxide fiber results in a fiber with high electrical conductivity. Adding silver nanorods to the graphene film would increase the conductivity to the same as copper,
The classical theory of electromagnetism provides a good understanding of inputs and outputs of this process but a microscopic quantum mechanical description of how the light excites the electrons is lacking.
Though ultrasound detectors existncluding those used in medical imaginghe researchers made their own sensitive one in the form of a microscopic plastic ring known as a microring resonator.
Using the South pole Telescope scientists observed twisting patterns in the polarization of the cosmic microwave backgroundâ##light that last interacted with matter very early in the history of the universe less than 400000 years after the big bang. These patterns
Measuring B modes generated by inflation is a possible way to alleviate lingering doubt. he detection of a primordial B-mode polarization signal in the microwave background would amount to finding the first tremors of the big bangsays
The researchers led by Suman Datta professor of electrical engineering tuned the material composition of the indium gallium arsenide/gallium arsenide antimony
Band gaps determine how a semiconducting material carries an electric current. In quantum dots microscopic discs of atom-thick graphene oxide band gaps are responsible for their fluorescence
The team previously reported the first observation of superfluorescence in a solid-state system by strongly exciting semiconductor quantum wells in high magnetic fields.
Previous experiments showed the ability to create superfluorescent bursts from a stack of quantum wells excited by a laser in extreme cold and under the influence of a strong magnetic field both
but mysteries remained especially in results obtained at low or zero magnetic fields. Kono says the team didn t understand at the time why the wavelength of the burst changed over its 100-picosecond span.
but also managed to record it without having to travel to the National High Magnetic field Laboratory at Florida State.
The quantum well as before consisted of stacked blocks of an indium gallium arsenide compound separated by barriers of gallium arsenide. t s a unique solid-state environment where many-body effects completely dominate the dynamics of the systemkono says. hen a strong magnetic field is applied electrons
and holes are fully quantizedâ##that is constrained in their range of motionâ##just like electrons in atomshe says. o the essential physics in the presence of a high magnetic field is quite similar to that in atomic gases.
and eventually eliminate the magnetic field we re entering a regime atomic physics cannot access where continua of electronic states
but it required high magnetic fields so there was no practical application. But now the present work demonstrates that we don t need a magnet. he team included co-lead authors Timothy Noe a Rice postdoctoral researcher and Ji-Hee Kim a former Rice postdoctoral researcher and now a research
Their paper appears in Physical Review X. e ve taken an electrical engineering approach but that s
And it s an important first step in advancing wireless signal processing and designing ultrathin efficient cell phones. ur devices are much smaller than any other sources of radio signals
While graphene NEMS will not be used to replace conventional radio transmitters they have many applications in wireless signal processing. ue to the continuous shrinking of electrical circuits known as Moore s Law today s cell phones have more computing
and processing radio-frequency signals are much harder to miniaturizesays project co-leader Kenneth Shepard an electrical engineering professor. hese off-chip components take up a lot of space and electrical power.
This flow of electrons is electric current. But to establish a consistent direction of their movement
it s as big a leap going from film to semiconductors as it is going from semiconductors to these superconductors.
through near-IR using Microwave Kinetic Inductance Detectors (MKIDS. An MKID is a type of superconducting photon detector;
Superconductivity is a quantum phenomenon that occurs as certain materials are cooled to near absolute zero thereby eliminating all electrical resistance and magnetic fields.
which enable thousands of devices to be read out over a single microwave feed line.
The size of the arrays is limited by the microwave readout which uses very similar technology to a cellphone base station.
and tuned to capture microwave signals researchers have designed a power harvesting device with efficiency similar to that of modern solar panels.
The device wirelessly converts the microwave signal to direct current voltage capable of recharging a cell phone battery or other small electronic device according to a report appearing in Applied Physics Letters.
Undergraduate engineering student Allen Hawkes working with graduate student Alexander Katko and lead investigator Steven Cummer professor of electrical and computer engineering designed an electrical circuit capable of harvesting microwaves.
and copper energy conductors wired together on a circuit board to convert microwaves into 7. 3v of electrical energy.
and the yolk-shell structure of eggs can improve the durability and performance of lithium-sulfur battery cathodes report researchers.
which is when the polysulfide chains in the battery s cathode (positive end) dissolve in the electrolyte the ionizing liquid that allows electrons to flow.
to make lithium-sulfur cathodes by synthesizing a nanocomposite consisting of sulfur coated with a common inexpensive conductive polymer called polyaniline and
what is perhaps the world s best material for tunable capacitors broadly called a tunable dielectric a special insulator
The new type of tunable dielectric could greatly improve the performance of microwave circuit capacitors found in every cell phone
The tunable dielectric and its properties were envisioned first on paper tested on the computer created in the lab atom by atom patterned into a capacitor device
By comparison today's commercially used tunable dielectric material is layered not a material and contains barium in addition to strontium oxygen and proprietary additives.
and how to push its performance even further. t is clear that we have discovered a killer materialschlom says ut it is likely that even better tunable dielectrics can be found using our approach. he Army Research Office
(1400 C). his is a record performance in terms of thermal stability and a major advance for the field of thermophotovoltaicssays Shanhui Fan a professor of electrical engineering at Stanford university.
and analyze data from our oceans in real timesays Tommaso Melodia associate professor of electrical engineering at the University at Buffalo
Crop growers wine grape and other fruit growers food processors and even concrete makers all benefit from water sensors for accurate steady and numerous moisture readings.
and then use DNA to build the molecules that realize the desired dynamicssays corresponding author Georg Seelig am assistant professor of electrical engineering
Today s accelerators use microwaves to boost the energy of electrons. Researchers have been looking for more economical alternatives and this new technique
in optical resonators the pitch corresponds to the color or wavelength of the lightsays Kerry Vahala professor of information science and technology and applied physics at the California Institute of technology (Caltech.
and his colleagues transferred this concept to their optical resonator focusing on the optical quality factor and other elements that affect frequency stability.
The researchers were able to stabilize the light s frequency by developing a silica glass chip resonator with a specially designed path for the photons in the shape of
Because the new resonator has a longer path the energy changes are diluted so the power surges are dampenedâ##greatly improving the consistency
and quality of the resonator s reference signal which in turn improves the quality of the electronic or optical device.
In the new design photons are applied to an outer ring of the spiraled resonator with a tiny light-dispensing optic fiber;
In combination with the resonator a special guide for the light was used losing 100 times less energy than the average chip-based device.
In the past several years optical-based oscillatorsâ##which require optical reference cavitiesâ##have become better than electronic oscillators at delivering stable microwave and radio frequencies.
and electronics. urrently electronics perform signal processing while photonics rule in transporting information from one place to another over fiber-optic cable.
The achievement is reported in an article on the cover of the journal Nature. eople have been talking about a new era of carbon nanotube electronics moving beyond siliconsays Subhasish Mitra an electrical engineer
Professor Giovanni De Micheli director of the Institute of Electrical engineering at Ã#cole Polytechnique FÃ dã rale de Lausanne in Switzerland highlighted two key contributions the Stanford
But smaller faster and cheaper has meant also smaller faster and hotter. nergy dissipation of silicon-based systems has been a major concernsays Anantha Chandrakasan head of electrical engineering and computer science at MIT and a world
The findings published in the Proceedings of the National Academy of Sciences help scientists to interpret the dynamics of the core of the Earth the source of our planet s magnetic field.
and Environment at the University of Leeds. he magnetic field pushes eastwards on the inner core causing it to spin faster than the Earth
The fact that the Earth s internal magnetic field changes slowly over a timescale of decades means that the electromagnetic force responsible for pushing the inner and outer cores will itself change over time.
what the researchers have dubbed chemically otorized microscopic matchsticks. efore now most research seeking to influence the direction of motion of microscopic components have had to use outside influences such as a magnetic field
 ventually this technology will be used to create more powerful devices. his research indicates that questions relating to the physics of quantum communication can be addressed using electronic circuits at microwave frequencies. ne may even foresee future experiments in which quantum information will be distributed over larger distances
directly by microwave to optical interfaces for quantum communicationsays Fedorov. Teleportation is expected to find applications in secure communication
The separator keeps the electrolyte on the anode and cathode sides of a traditional battery apart
while allowing ions to pass through). ur innovation has been to identify an unconventional electrolyte/separator system that remains stable at high temperatures,
which governs motor control but instead the significant changes occurred in the SMA on the opposite side of the trained hand.
says Changhuei Yang, professor of electrical engineering, bioengineering and medical engineering at the California Institute of technology (Caltech).
#Graphene ribbons improve lithium ion batteries Anodes for lithium ion batteries built with ribbons of graphene perform better, tests show.
After 50 charge-discharge cycles, the proof-of-concept units retained a capacity that was still more than double that of the graphite currently used for LI battery anodes.
and now it s time we think about how to put these lasers into practice#says physicist Na Young Kim a member of the Stanford university team which was led by Yoshihisa Yamamoto professor of electrical engineering and of applied physics.#
##Dynamo accounts for Sun s weather cycle University of Chicago University of Leeds rightoriginal Studyposted by Richard Mellor-Leeds on May 23 2013u.
what drives the generation of astrophysical magnetic fields like the Sun s. Scientists have known since the 18th century that the Sun regularly oscillates between periods of high and low solar activity in an 11-year cycle
It has become increasingly important to be able to understand the Sun#s magnetic activity as it is the changes in its magnetic field that are responsible for#space weather#phenomena including solar flares and coronal mass ejections.
The research published in Nature explains how the cyclical nature of these large-scale magnetic fields emerges providing a solution to the mathematical equations governing fluids and electromagnetism for a large astrophysical body.
The mechanism known as a dynamo builds on a solution to a reduced set of equations first proposed in the 1950s
when applied to objects with high electrical conductivity. The mechanism takes into account the#shear#effect of mass movement of the ionised gas known as plasma
#Previously dynamos for large highly conducting bodies such as the Sun would be overwhelmed by small-scale fluctuations in the magnetic field.
In addition this mechanism could be used to describe other large spinning astronomical bodies with large-scale magnetic fields such as galaxies.
The dynamo was developed through simulations using the high-performance computing facilities located at the University of Leeds.#The fact that it took 50 years
and huge supercomputers shows how complicated the dynamo process really is#says Professor Fausto Cattaneo of the University of Chicago#s department of astronomy and astrophysics.
At the start of the 20th century it was recognized then that these sunspots were the result of the Sun#s magnetic field.
and any passengers into rotational thrust to charge a battery and power the vehicle in conjunction with an electric motor.
It can be powered by one, two, three or four people, the battery-powered electric motor, or any combination of human and electric power.
Magnetoencephalography (MEG) is a noninvasive procedure that measures the magnetic fields generated by the brain. This helps neuroscientists understand perceptual and cognitive processes
which is 50 million times weaker than the Earth's magnetic field.""By making an inexpensive system you could have one in every hospital to test for traumatic brain injuries
Another system, developed at the UK's National Physical Laboratory, uses radio frequencies, microwaves, terahertz radiation and far-infrared light to determine the ripeness of strawberries
as well as humidity and electrical conductivity probes that are buried beneath the soil. Using their smartphone, a farmer can access their network of FLOW-AIDS over the internet,
In addition, a series elastic actuator consisting of an electric motor with a spring in series with its output shaft that allows the actuator to gauge
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