whiskers play a key role for animals in exploring, hunting or even just living undergroundsays electrical engineer Cagdas Tuna,
where the capacitance of the resistor takes time to charge. Electrical transistors are limited by the RC delay time
which is to say it doesn't have to float over magnets nor utilize superconductors (like the Lexus hoverboard does).
For example a Gan power adapter can be integrated into a laptop and other electronic devices eliminating the clunky brick that is commonly comes with a device's power cord.
Power inverters convert direct current into the alternating current that powers the vehicle. The Oak ridge inverter achieves much higher power density with a significant reduction in weight and volume.
or cathode and scratched the surface with sandpaper to form a light panel capable of producing a large stable and homogenous emission current with low energy consumption.
The new devices have luminescence systems that function more like cathode ray tubes with carbon nanotubes acting as cathodes
and a phosphor screen in a vacuum cavity acting as the anode. Under a strong electric field the cathode emits tight high-speed beams of electrons through its sharp nanotube tips--a phenomenon called field emission.
The electrons then fly through the vacuum in the cavity and hit the phosphor screen into glowing.
We have found that a cathode with highly crystalline single-walled carbon nanotubes and an anode with the improved phosphor screen in our diode structure obtained no flicker field emission current and good brightness homogeneity Shimoi said.
Field emission electron sources catch scientists'attention due to its ability to provide intense electron beams that are about a thousand times denser than conventional thermionic cathode (like filaments in an incandescent light bulb.
That means field emission sources require much less power to operate and produce a much more directional and easily controllable stream of electrons.
The resistance of cathode electrode with highly crystalline single-walled carbon nanotube is very low. Thus the new flat-panel device has compared smaller energy loss with other current lighting devices
which can be used to make energy-efficient cathodes that with low power consumption. Many researchers have attempted to construct light sources with carbon nanotubes as field emitter Shimoi said.
The selected RNA serves as an adaptor that determines the target anywhere within the genome.
#Magnetic superconductor: Strange bedfellows Chemists at Ludwig-Maximilias-Universitaet (LMU) in Munich have synthesized a ferromagnetic superconducting compound that is amenable to chemical modification opening the route to detailed studies of this rare combination of physical properties.
Superconductivity and ferromagnetism--the normal form of magnetism such as that found in the familiar horseshoe magnet--are like chalk and cheese:
Almost all known superconductors on the other hand form pairs of anti-aligned electrons and exclude magnetic field lines from their interiors.
It is a ferromagnetic superconductor says Professor Dirk Johrendt of the Department of chemistry. This is an important advance
Ferromagnetic superconductors are not unknown but they are exceedingly rare and almost always exhibit both properties simultaneously only when they are cooled to temperatures close to absolute zero(-273°C). The layered material
and superconductivity emerges. At somewhat lower temperatures the iron atoms in the (Life) OH layer become ferromagnetic
but superconductivity persists nevertheless. 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.
Our new compound for the first time gives us the chance to explore the influence of chemical modification on the coexistence of superconductivity
A typical lithium-ion battery consists of two tightly packed electrodes--a carbon anode and a lithium metal-oxide cathode--with an ultrathin polymer separator in between.
Overcharging causes lithium ions to get stuck on the anode and pile up forming chains of lithium metal called dendrites Cui explained.
and eventually make contact with the cathode causing the battery to short. Smart separatorin the last couple of years we've been thinking about building a smart separator that can detect shorting before the dendrites reach the cathode said Cui a member of the photon science faculty at the SLAC National Accelerator Laboratory
at Stanford. To address the problem Cui and his colleagues applied a nanolayer of copper onto one side of a polymer separator creating a novel third electrode halfway between the anode and the cathode.
The copper layer acts like a sensor that allows you to measure the voltage difference between the anode
and the separator Zhuo said. When the dendrites grow long enough to reach the copper coating the voltage drops to zero.
It's a warning that the battery should be removed before the dendrites reach the cathode and cause a short circuit.
If you wanted to error on the side of being safer you could put the copper layer closer to the anode.
Locating defectsin addition to observing a drop in voltage co-lead author Hui Wu was able to pinpoint where the dendrites had punctured the copper conductor simply by measuring the electrical resistance between the separator and the cathode.
so it has negligible effect on the flow of lithium ions between the cathode and the anode.
NTU Singapore's scientists replaced the traditional graphite used for the anode (negative pole) in lithium-ion batteries with a new gel material made from titanium dioxide an abundant cheap and safe material found in soil.
NTU professor Rachid Yazami who was the co-inventor of the lithium-graphite anode 34 years ago that is used in most lithium-ion batteries today said Prof Chen's invention is the next
which Prof Chen's nanostructured anode has proven to do. Prof Yazami who is Prof Chen's colleague at NTU Singapore is not part of this research project
Lithium-ion batteries usually use additives to bind the electrodes to the anode which affects the speed in
When the engineers sought collaborators to test the device in potentially useful applications H.-S. Philip Wong a professor of electrical engineering connected them with Victor Tse a neurosurgeon and consulting associate professor at Stanford School of medicine.
#Unstoppable magnetoresistance Mazhar Ali a fifth-year graduate student in the laboratory of Bob Cava the Russell Wellman Moore Professor of Chemistry at Princeton university has spent his academic career discovering new superconductors materials
Ali applied a magnetic field to a sample of WTE2 one way to kill superconductivity if present and saw that its resistance doubled.
between biology and mechatronics.""The direct skeletal attachment is created by what is known as osseointegration, a technology in limb prostheses pioneered by associate professor Rickard Brånemark and his colleagues at Sahlgrenska University Hospital.
Other authors are Jongyoon Han an MIT professor of electrical engineering and biological engineering SMART researchers Zhiyong Poon L. M. Nyan and Tanwi Kaushik and National University of Singapore
First he identified the primitive elements commonly used in microfluidic systems much like how circuitry is broken down in electrical engineering.
because a high density of transistors has many direct and indirect benefits for computation and signal processing.
The basic concept behind resistive memory devices is the insertion of a dielectric material--one that won't normally conduct electricity--between two wires.
a narrow conduction path can be formed through the dielectric material. The presence or absence of these conduction pathways can be used to represent the binary 1s and 0s of digital data.
Research with a number of dielectric materials over the past decade has shown that such conduction pathways can be formed broken and reformed thousands of times,
At the same time, the researchers also conducted countless tests to compare the performance of silicon oxide memories with competing dielectric RRAM technologies."
and moving parts and electrical engineers to design control systems Linden said. Tests have shown that each of the eight fiber-optic cables can produce between 80 and 90 watts of energy meaning the whole system can deliver up to 700 watts of energy into the reaction chamber said Linden.
says Daniela Rus, the Andrew and Erna Viterbi Professor in MIT Department of Electrical engineering and Computer science,
and Andrew Spielberg and Stuart Baker, both graduate students in electrical engineering and computer science. Grasping consequencesthe problem the researchers address is one in
and then a strong electric field stretches it out. The process is slow, however, and the number of nozzles per unit area is limited by the size of the pump hydraulics. The other approach is to apply a voltage between a rotating drum covered by metal cones and a collector electrode.
and the electric field causes the solution to travel to the top of the cones, where it emitted toward the electrode as a fiber.
says Reza Ghodssi, a professor of electrical engineering at the University of Maryland. Relative to other approaches, he adds,
When atoms travel across such an electric field, they are drawn to places of minimum potential in this case, the troughs.
an MIT graduate student in electrical engineering and computer science and first author on the new paper. e need to regulate the input to extract the maximum power,
the Joseph F. and Nancy P. Keithley Professor in Electrical engineering, use an inductor, which is a wire wound into a coil.
Mass-Selected Photoelectron Circular Dichroism (MS-PECD) uses circularly polarised light produced by a laser to ionise the molecules using a couple of photons to knock an electron out of the chiral molecule to leave a positively charged ion behind.
The electrical engineers used their frequency comb to synchronize the frequency variations of the different streams of optical information,
said UC San diego electrical engineering Ph d. student Eduardo Temprana, the first author on the paper. The frequency comb ensured that the system did not accumulate the random distortions that make it impossible to reassemble the original content at the receiver.
but they suffer from relatively low electrical conductivity, Mirvakili says. In this new work, he and his colleagues have shown that desirable characteristics for such devices,
an electrical engineer working on the problem at the Institut de Recherches Cliniques de Montréal (IRCM). Such technology is used, for instance,
it a hoto batterywhere the anode itself is made of titanium nitride and ambient light. Under artificial light, this prototype battery has a capacity of 77.8 mah/g. Itl quite happily power a small fan or LED light for about 30 seconds,
including sustainable and economical anode material which will not be consumed as a part of the discharge reactions,
and an anode material that is free from loss of active materials, irreversible structural deformations, spontaneous deinsertion reactions,
and safety concerns commonly encountered in the state of the art anode materials in aqueous rechargeable batteries. ccording to a press release from the American Chemical Society,
they use two dielectric materials, a Teflon substrate studded with cylinders made of a ceramic. The ceramic has a high refractive index,
which appears in the latest issue of Progress in Electromagnetics Research. This particular cloak exists only in computer simulation,
Silicon-based materials can theoretically store more than 10 times charge than the carbon-based materials most commonly used in the anodes of commercial lithium-ion batteries,
making them promising next-generation anode materials. However, silicon big problem is that it can swell by more than 300 percent
causes the anode to crack. One way to overcome this problem is to make silicon porous enough to accommodate the expansion.
Now scientists have developed 3-D porous silicon-based anode materials using the kind of reed leaves that are abundant in temperate wetlands.
and made them into silicon-based anodes by heating them with magnesium and coating them with carbon.
and discharging, these anodes could store nearly three times more charge than carbon-based anodes; after 4, 000 such cycles,
they could still store more than 15 percent more than carbon-based anodes. The scientists detailed their findings online 26 june in the journal Angewandte Chemie International Edition l
and actually increase its electrical conductivity while being stretched, without losing any of its resistance. An international research team based at the University of Texas at Dallas initially targeted the new super fiber for artificial muscles and for capacitors
and the thin rubber coating serves as the dielectric. Voilà! You have a fiber capacitor. his technology could be well-suited for rapid commercialization,
a physicist and electrical engineer at Arizona State university at Tempe who worked on the laser. In addition, he says that white lasers could also lead to video displays with more vivid colors and higher contrast than conventional displays.
The low profile keys have a top electrification layer that allows them to generate charge from typing friction (aka contact electrification) so the keyboard is able to register individual keystroke data
The company has partnered with more than 20 third-party app developers for the first wave of applications pulling information from its adapter,
Owners of the existing Automatic adapter will have access to most of the apps available in the App Gallery,
After a demo last week, Automatic CEO Thejo Kote told Techcrunch that the new adapter is shipping today
but says that it uses agnetic levitationand iquid nitrogen cooled superconductors and permanent magnetsto achieve hover flight.
This includes changing the refractive index, the electrical conductivity, the magnetic susceptibility and so on. What these guys are proposing is an entirely new form of manufacturing based on clever chemistry and the powerful technique of self-assembly.
and believes certain electrical insulator materials used in D-Wave s chips may be limiting its performance.
The electrolyzer projects under construction in Germany typically consist of a few buildings each the size of a shipping container that consume excess renewable energy on sunny and windy days by turning it into an electric current that powers the water-splitting reaction.
That s where electrical engineer Ada Poon and her team at Stanford university say they might be able to help.
and derive power from electromagnetic induction in which a current running through a coil of wire generates a magnetic field that then induces a current in a nearby device.
Poon and her team found a way to use electromagnetic induction through biological tissue without that exponential decay.
says Wei Lu, a professor of electrical engineering and computer science at the University of Michigan, and cofounder of Crossbar.
Michel Maharbiz, a professor in Berkeley electrical engineering department, says the Obama brain initiative, and now the DARPA money, has created a eeding frenzyaround new technology. t a great time to do tech for the brain,
They can move only when placed on a surface with a specific pattern of electrical circuits inside.
The Columbia scientists, working with researchers in South korea, attached small strips of graphene to microscopic metal electrodes which passed an electric current through the suspended strips causing them to heat up and bright
The Columbia scientists, working with researchers in South korea, attached small strips of graphene to microscopic metal electrodes which passed an electric current through the suspended strips causing them to heat up and bright
and a wireless USB adapter, among other technologies. Using a tablet to send signals to the harness and to the dog,
and a wireless USB adapter, among other technologies. Using a tablet to send signals to the harness and to the dog,
resistors and capacitors, could one day be printed in the comfort of one home, said Dr Kwok Sen Wai,
#The 3d printed Peek smartphone adapter helps diagnose eye disease in developing countries While we come across so many interesting 3d printed applications,
And that exactly where the 3d printed Peek Retina comes in. t a clip-on camera adapter that gives high quality images of the back of the eye and the retina.
Due to extensive testing and prototyping, this 3d printed smartphone adaptor should be ready for use in October of this year,
and Ozcan, the UCLA team was made up of an interdisciplinary group of researchers from the fields of electrical engineering,
Siyi, a Computer & Control engineering student at Nankai University, explains, his way, people with disabilities will be able to feel the relative temperature level of an object.
& Control engineering at Nankai, concurred, s far as people with disabilities are concerned, they have a great wish to be able to live as normal healthy people.
Electrical conductivity improved threefold compared to supercapacitor electrodes made of conventional activated carbon.""We also found that our designer carbon improved the rate of power delivery and the stability of the electrodes,"Bao added.
and these particles not only serve as a cathode by corroding to protect the iron structure
when they pass such an electric field. The ion crystal is charged a atomic grid created by Vuletic to analyze the effects of friction, atom by atom.
The method described in the Scientific Reports article tructural color printing based on plasmonic metasurfaces of perfect light absorptioninvolves the use of thin sandwiches of nanometer scale metal-dielectric materials known as metamaterials that interact with light
which create a strong electric field intensity gradient, are key to inducing cantilever oscillations. Because the changes of the electromagnetic field in such systems are measured in tens of nanometers,
they studied one of the samples over several months with an X-ray photoelectron spectrometer to determine its exact chemical makeup. y taking the measurement every week or two,
Then Alex Pronschinske, Ph d.,first author on the paper and a postdoctoral researcher in Sykeslab, suggested that they measure the electrons emitted by the sample without prodding from X-rays in the photoelectron spectrometer.
At its most basic level, a battery is made of two metal electrodes (an anode and a cathode) with some sort of solution between them (electrolyte.
electrolyte ions are stored in the anode. As the battery discharges, electrolyte ions leave the anode
and move across the battery to chemically react with the cathode. The electrons necessary for this reaction travel through the external circuit,
generating an electric current. A supercapacitor is similar to a battery in that it can generate and store electric current,
but unlike a battery, the storage and release of energy does not involve chemical reactions: instead, positive and negative electrolyte ions simply tickto the surfaces of the electrodes when the supercapacitor is being charged.
When a supercapacitor is being discharged to power a device, the ions can easily opoff the surface
An electric current delivered by the device removes the membrane, releasing a single dose. The device can be programmed wirelessly to release individual doses for up to 16 years to treat
a senior lecturer in the Department of physics and Electrical engineering in Northumbria University, is a collaborative effort between Oxford university, the University of Barcelona and UT Malaysia.
was made in the lab of Federico Capasso, the Robert L. Wallace Professor of Applied Physics and Vinton Hayes Senior Research Fellow in Electrical engineering at the Harvard John A. Paulson School of engineering and Applied science (SEAS)."
involves the application of an electric field that narrows the width of the reaction barrier, thereby allowing hydrogen atoms to tunnel away from the surface.
The pulse generates an electric field as well as injecting electrons into the sample. By using a new theoretical approach developed by Dr. Kajita,
the electric field reduces the width of the barrier, thereby allowing the hydrogen to desorb by quantum tunneling (Fig. 2). Lead author Prof.
For instance, electric fields could be used to extract hydrogen from a Tio2-based storage device e
#Grolltex to Commercialize Graphene Mass Production Technology with The Triton Fund Investment A University of California,
Kang L. Wang, a UCLA professor of electrical engineering; Liang He, formerly a postdoctoral scholar in Wang lab;
in turn has a strong effect on the electrical conduction of grapheneexplains Professor Mischa Bonn, Director at the MPI-P. The study,
The research is focused mainly on reducing the expense of cathodes used in fuel cells that power homes and automobiles.
The oxygen-reduction reaction occurring at the cathode in the fuel cell requires platinum in substantial quantities.
but using careful signal processing schemes they developed, Biondi and De Ridder can digitally isolate only those waves that are passing through one sensor and then another one downstream.
In contrast, the Si705x sensorspatented signal processing technology provides stable temperature accuracy over the entire operating voltage
Other NIST researchers have demonstrated a new probe for making the first calibrated measurements of electric fields above 100 GHZ
an MIT graduate student in electrical engineering and computer science and first author on the new paper. e need to regulate the input to extract the maximum power,
the Joseph F. and Nancy P. Keithley Professor in Electrical engineering, use an inductor, which is a wire wound into a coil.
#DIRHA Prototype Enables People with Disabilities to use Voice as a Remote control to Access Home Devices Based on advanced voice recognition and audio signal processing technology,
-and Nanophotonics Laboratory at UCLA Electrical engineering and Bioengineering Departments, said. To scan the DNA researchers developed a computational interface
said Qiaoqiang Gan, UB assistant professor of electrical engineering and the study lead author. Additional authors of the study are:
UB Ph d. candidates in electrical engineering Nan Zhang, Kai Liu, Haomin Song, Xie Zeng, Dengxin Ji and Alec Cheney;
both assistant professors of electrical engineering at UB. Source: University at Buffal S
#South korea Reports its First 2 Deaths From MERS Virus South korea on Tuesday confirmed the country's first two deaths from Middle east Respiratory Syndrome as it fights to contain the spread of a virus that has killed hundreds
we can create electric fields that attract and move around droplets containing any chemical solution, "said first author Alphonsus Ng who recently graduated with a Phd from the U of T Institute of Biomaterials and Biomedical engineering (IBBME) and Donnelly Centre,
An electric current delivered by the device removes the membrane, releasing a single dose. The device can be programmed wirelessly to release individual doses for up to 16 years to treat
With a new quick-connect adapter for dust-free powder transfer, DE can be mixed directly into the cell culture fluid.
such strains are only found at low levels within the human gut, according to Timothy Lu, an associate professor of biological engineering and of electrical engineering and computer science,
who is also Chancellor Professor of Electrical engineering and Bioengineering. his mobile platform can be used for point-of-care testing,
The UCLA team included researchers from electrical engineering, physics and astronomy, bioengineering, pathology and laboratory medicine,
thin wires functioned well as resistors; whereas flat plates made for useful capacitors. The basis of this led to the production of the sensor cap for milk cartons.
In a conventional battery, the anode (along with the cathode, the anode is responsible for charging and discharging) is coated with a material based on graphite.
Some lithium-ion batteries with graphite anodes provide less than 600 Wh/L a thin sheet of lithium foil was used to replace the more conventional electrode material,
#High-performance 3-D Silicon Anodes Made From Reed Leaves A low-cost approach to fabricating nanoporous silicon a potentially highly useful material for next-generation anode material in batteries,
The silicon anode that results features the 3-D hierarchical architecture of the reed leaf as well as an interconnected porosity+internal carbon coating.
Even after 4, 000 cycles and at a rate of 10c, the anode achieved a specific capacity of 420 mahg-1. Here are some excerpts from a paper on the work:
the described 3d porous Si-C nanocomposite has a great potential as a practical anode material for Li-ion batteries.
as well as developing the technique to etch other materials, such as superconductors and dielectrics for the development of water-repellent electronics s
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.
and a wireless USB adapter, among other technologies. Using a tablet to send signals to the harness and to the dog,
Using electroluminescent paint, Lexus have converted an RC F coupe into a on-off model they are calling the'heartbeat car'.
and uses it to trigger the electroluminescent paint to display the heartbeat in a pulsating pattern on the car's side panels.
Pictured, the car on the test track The electroluminescent paint contains phosphorescent substances that emit light
and the liquid solution is guided onto the mold by an electric field the process is called electrospinning. it evenly coats
EAV is a form of acupuncture where a small electric current is passed between pairs of electrodes.
An electrotrode in the pen tip creates an electrical circuit with the body through a second electrode in the pen case.
This paves the way to producing high-resolution and large organic electroluminescent (EL) displays and establishing cost-competitive manufacturing methods.
and characterized by a group headed by professor Zhou and Dr Liu at the Department of Electrical engineering at USC.
and characterized by a group headed by professor Zhou and Dr Liu at the Department of Electrical engineering at USC.
also announced that its fleet electrification initiative has exceed the anticipated $50 million annual industry commitment.
The EEI launched the fleet electrification initiative last year, which includes a commitment by the industry group
The difficulties with aluminum-air construction, in particular, has been rapid degradation of the anode and, in early models of Al-Air, the release of hydrogen gas.
As the aluminum anode is consumed by contact with oxygen, hydrated aluminum forms as a byproduct.
and used to create a new aluminum anode, which is why the batteries are referred to as rechargeable.
Periodically, the aluminum anode will have to be replaced it not clear how often the Fuji Pigment battery would need servicing of this sort.
though previous estimations had put the cost of an Al-air system at roughly $1. 1 per kg of aluminum anode.
(and the weight of the aluminum anode in these batteries is unknown), but the team that performed that analysis noted that proper recycling would put Al-air in the same cost range as conventional internal combustion engines.
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