Articles tagged with Electric Current
Engineer Dr. Joseph S. Friedman designs a novel computing system made solely from carbon that might replace silicon transistors in electronics. The resulting all-carbon spin logic proposal enables cascaded logic gates with increased performance and potential terahertz clock speeds.
Researchers have developed a noninvasive method for deep brain stimulation using electrodes placed on the scalp, which could make the treatment less risky, less expensive, and more accessible. The approach has shown promising results in treating Parkinson's disease and other conditions, with no harmful effects detected.
Researchers at MIT have measured Weyl fermion chirality using circularly polarized light, exhibiting an electrical current without external voltages. The TaAs metal produces a large current response, making it suitable for sensitive mid-infrared detectors.
Researchers found that transcranial direct-current stimulation (tDCS) did not produce any additional benefit to working memory training, contradicting previous hype. The study suggests that tDCS may be more effective in specific areas of the brain and that its effects on cognitive abilities are still unclear.
A new research technique introduces tensile stress into both the channel and drift region of transistors, resulting in improved performance. The technique, using CESLs, offers better frequency performance and driving capability than unstrained devices.
Researchers investigate lithium-ion batteries under crash loads, including previous stress, charging status, and temperature. They develop tailor-made test rigs and simulations to understand battery behavior, aiming to contribute to improved range and vehicle design while ensuring safety.
Researchers from the University of Exeter have developed a method to use graphene to generate complex and controllable sound signals, opening up new possibilities for audio-visual technologies. The technique involves heating and cooling graphene using an alternating electric current, generating sound waves without physical movement.
A team led by Professor Lloyd Hollenberg imaged electric currents in graphene using a diamond-based quantum sensor. The technique reveals microscopic behavior of current in quantum computing devices and 2D materials, enabling improved reliability and performance.
A new chess ranking system ranks players based on the quality of their moves, producing more accurate results than traditional ELO scores. The system uses probabilistic models to estimate win/loss/draw probabilities for any match between two players.
Scientists assessed the state of space weather research, including geomagnetically induced currents (GICs) that can disrupt power systems, railroads, and pipelines. GICs can cause temporary blackouts and mis-operation of railway signaling systems.
A recent research project aims to develop biocomputers that can overcome current computing obstacles, such as high energy consumption and processing speed limitations. The new approach uses biomolecular motors to solve problems by moving through a nanofabricated network of channels.
Researchers from University of Delaware and Princeton University show that US grid can manage large amounts of offshore wind power, reducing pollution and electricity costs. The study found that the PJM grid can handle over 35 gigawatts of offshore wind, powering approximately 10 million homes.
Current and former smokers with medical comorbidities are more likely to use e-cigarettes, which may be seen as a safer alternative to combustible cigarettes. The study found that e-cigarette use continues to rise, especially among present smokers with asthma or cardiovascular disease.
Researchers discovered a new discharge phenomenon, apokamp, occurring off the plasma arc in air at normal atmospheric pressure. The apokamp consists of ionisation waves - plasma bullets - moving with high velocity and may help explain blue jet phenomenon identified in 1994.
Researchers at MIT have designed a power converter that maintains efficiency across a wide range of current levels, reducing resting power consumption by 50%. The converter uses a variable clock and advanced control circuitry to accommodate high-power transmissions, enabling new possibilities for energy-harvesting devices.
Researchers at Michigan State University have created a stretchable integrated circuit made entirely using an inkjet printer, enabling the potential for inexpensive mass production of smart fabric. The material can be produced on a standard printer and has applications in wearable electronics and soft robotics.
Researchers at UCSB discovered a way to confer electricity-generating ability on non-electrogenic bacteria by feeding them synthetic iron-containing molecules. This technique has potential applications for sustainable electricity generation and wastewater treatment.
Researchers at ANU have developed dynamic liquid materials that can be remotely controlled by changing wave patterns, enabling new techniques to manipulate micro-organisms. This breakthrough could lead to innovations in invisibility cloaking, superlenses and high-efficiency antennae.
Scientists successfully demonstrate circularly polarized electroluminescence from spin-polarized LEDs at room temperature, without external magnetic fields. The discovery opens up new avenues for spintronics and potential applications in secure optical communications, cancer diagnosis, and optically enhanced nuclei imaging.
Scientists at the University of Rochester have created a new microbial fuel cell using a paper electrode coated with carbon paste, which outperforms traditional materials in terms of efficiency and cost-effectiveness. The innovation has significant implications for wastewater treatment and energy production.
Researchers at Helmholtz-Zentrum Dresden-Rossendorf have developed cobalt grids that can be reliably programmed at room temperature. Three distinct magnetic states, denoted as G, C, and Q, were found around each hole in the grid. This discovery could lead to more efficient computing using spin-waves instead of electric current.
A weekend camping trip can reset people's internal clocks rapidly, regardless of season, by increasing daytime exposure to sunlight and reducing nighttime electrical lighting. This helps to shift melatonin levels and improves sleeping patterns.
University of Washington researchers have made a breakthrough in building electrically pumped nanolasers, critical for high-performance parallel computing and data center efficiency. By integrating atomically thin monolayer materials with nano-cavities, they have achieved efficient light emission and modulation.
A PPPL physicist has discovered that motion in nearby magnetic fields can trigger magnetic reconnection, a process releasing energy when magnetic field lines snap together. This research may aid fusion reactions and better understand solar phenomena.
A new technique can precisely measure individual protein molecules in blood and body fluids, providing valuable information on neurodegenerative diseases. The 5-D fingerprint analysis uncovers unique characteristics of misshapen proteins that contribute to disease progression.
Scientists at the University of Strathclyde discovered a way to create narrowband radiation with high efficiency, challenging a fundamental understanding of electromagnetic radiation. This breakthrough has significant implications for materials science and medical treatments.
A new study reports an estimated 76,380 Americans will be diagnosed with melanoma in 2016, with current lifetime risk being 1 in 54 for invasive melanoma. The overall burden of disease is increasing, with rising rates and higher mortality rates, exceeding the previous estimate of 10,130 deaths
Researchers at Arizona State University have developed a novel technique to identify carbohydrates, which play a vital role in life processes. The new method, called 'sequencing by recognition,' uses electricity to release current spikes that can be measured and analyzed to identify specific carbohydrate molecules with high accuracy.
A recent study published in JAMA Internal Medicine found that long-term, low-intensity smoking is associated with a higher risk of death from all causes and lung cancer. The research also showed that former smokers who quit at a younger age had progressively lower risks of death.
The study introduces tunneling modulation of a quantum well transistor laser, enabling fast carrier transport and recombination. This technology relies on intra-cavity photon-assisted tunneling, which enhances optical absorption and modulation in transistors and lasers.
Scientists discover Bismuth is superconducting at extremely low temperatures, defying expectations due to its low carrier density. The finding opens new avenues for research into the fundamental laws of superconductivity.
Researchers at PPPL and Princeton University proposed a groundbreaking solution to the mystery of fast magnetic reconnection. They developed a detailed theory for the mechanism leading to rapid reconnection, known as plasmoid instability, which breaks up plasma current sheets into small magnetic islands.
At temperatures near absolute zero, electrons exhibit their quantum nature and form a granular medium, consisting of individual particles that trickle through a conductor. This phenomenon can be explained by quantum electrodynamics.
The researchers found that the one-layer MoS2 device absorbs less light but produces seven times more photocurrent than the thicker seven-layer MoS2 device. This is attributed to quantum physics mechanisms, including electron tunneling and reduced recombination within the MoS2 layer.
Researchers at HZDR have successfully conducted an electrical current through gold-plated nanowires made from single DNA strands. The wires, assembled independently using DNA-origami, can function well even at normal room temperature, paving the way for future electronic devices based on DNA.
Researchers created a cloaking device to minimize crosstalk between photonic devices, enabling the packing of billions of devices into a single chip. This technology could lead to significant power consumption reductions and lower carbon emissions in data centers.
Researchers Philip Kortum and Michael D. Byrne examine how voting interface design affects voter behavior, revealing potential for errors and flawed designs. Poor interfaces can lead to ambiguous ballots, unintended vote selection, and nullified votes.
Researchers developed a technology to track water movement in concrete using small electrical currents, allowing for accurate monitoring of water flow and potential issues. This method is faster, safer, and less expensive than existing technologies.
Researchers develop a metamaterial device that can blend into its surroundings like a chameleon, using vanadium dioxide to trigger phase changes. The device's ability to change state is tunable by altering the current flowing through it.
The Alcator C-Mod tokamak achieved a record-breaking plasma pressure of 2.05 atmospheres, exceeding previous values by approximately 70 percent. This result validates the high-field approach to fusion energy, which could lead to smaller and cheaper fusion power plants.
Researchers have successfully simulated and observed the formation of plasmoids in a tokamak chamber, enabling plasma startup without solenoids. This breakthrough enables future commercial fusion power plants to operate more efficiently.
Researchers have created a new type of switch that can instantly connect and disconnect electrical flow, reducing power waste by up to 50% in devices like smartphones and laptops. This technology has the potential to significantly improve energy efficiency and prolong battery life.
A nationally representative survey found that US adults' supplement use remained stable between 1999 and 2012, with 52% reporting use of any supplements in 2011-2012. Multivitamin use decreased during this time period, from 37% to 31%.
Scientists at UT Dallas developed a tiny transistor with a gate size of 1 nanometer, smaller than the current limit of silicon-based transistors. The new device uses transition metal dichalcogenides, reducing leakage current by over two orders of magnitude and potential power consumption.
Researchers developed a transparent metal electrode with improved efficiency, using fractal-like nano-features inspired by leaf veins. The new design combines low surface coverage and ultra-low resistance, surpassing conventional indium tin oxide layers.
A team of researchers from the University of Houston has reported a more efficient catalyst for producing hydrogen gas by splitting water. The new hybrid catalyst requires significantly less energy than existing methods, making it a promising alternative to traditional platinum-based catalysts.
Researchers at University of Wisconsin-Madison have created carbon nanotube transistors that outperform state-of-the-art silicon transistors, achieving a current 1.9 times higher than silicon transistors. The breakthrough could pave the way for carbon nanotubes to replace silicon in electronic devices.
Researchers at Colorado State University have demonstrated a new method for switching magnetic moments of electrons in a thin film of barium ferrite, a magnetic insulator. This breakthrough could lead to more efficient and lower power computer memory devices.
Researchers at Trinity College Dublin and Fudan University in Shanghai have discovered that electrons with no mass can acquire a mass in the presence of an extremely high magnetic field. This finding represents a significant breakthrough in fundamental physics, opening up new possibilities for research in high-energy physics.
Researchers found that teens are more likely to be bullied by current or former friends and dating partners than by strangers. Close relationships can lead to intense competition for status and esteem, resulting in cyber aggression.
A new study found that youth cyberbullying is most common between current or former friends and dating partners, with approximately 17.2% of students experiencing cyberbullying within a week. Girls were twice as likely to fall victim to cyber aggression than boys, while LGBTQ youth were four times more likely to be victims.
Researchers have discovered a new mechanism for generating electric currents that leads to improved plasma confinement, solving a long-standing problem in fusion reactor development. The study found that the difference in trajectories between electrons and ions plays a crucial role in creating this electric current.
Researchers at University of Wisconsin-Madison have created high-performance, micro-scale solar cells that outshine comparable devices in key performance measures. The new, small cells capture current from charges moving side-to-side and generate significantly more energy than other sideways solar systems.
A new MIT system can identify how much power is being used by each device in a household, providing users with detailed information to make informed energy investments. The system, which samples data quickly and uses self-calibrating sensors, can detect specific appliances and their usage patterns.
Engineers from the University of Utah and Minnesota have discovered that interfacing two oxide compounds makes them highly conductive, producing a hundred times more free electrons than semiconductors. This innovation could lead to smaller power supplies and devices with reduced energy consumption, such as laptops and home appliances.
Researchers found that a magnetic current flowing through one iron sheet can create quantized spin waves in another separate sheet, without physical connection. This phenomenon has potential benefits for emerging spintronics technology.
Researchers have discovered that an essential function for computing may be possible within a space so small that it's effectively one-dimensional. The team found that with the new material, electric currents move in a more phased way, beginning first at the edges before appearing in the interior.
A team of researchers from Iowa State University has developed a proof-of-concept three-dimensional paper-based microbial fuel cell that generates power through biofilm formation on the anode. The device produces 1.3 μW of power and 52.25 μA of current, demonstrating its potential for environmentally friendly energy production.
NIST's N4 watt balance conducts its first measurement of Planck's constant, achieving accuracy of 34 parts per billion. This result is consistent with other countries' measurements and sets the stage for a new kilogram definition by 2018.
Scientists have reached a milestone in replacing the standard kilogram with a fundamental constant of nature, measuring Planck's constant for the first time. The new watt balance device has an uncertainty of only 34 parts per billion, a step closer to redefining the kilogram.