Satellite telephony is unsafe
Researchers at Ruhr-University Bochum cracked European Telecommunications Standards Institute (ETSI) encryption algorithms used in satellite phones, revealing significant weaknesses.
Electric Current
Articles tagged with Electric Current
Parkinson's treatment shows positive results in clinical testing
Researchers found that deep brain stimulation improved motor symptoms, including reduced tremors and dyskinesia, and increased periods of effective symptom control. Patients also reported improvements in daily activities, mobility, emotional state, social support, and physical comfort.
Down to the wire: Silicon links shrink to atomic scale
Researchers successfully created the narrowest conducting wires in silicon with a diameter of just one atom, exhibiting excellent electrical properties and beating out copper. This breakthrough could pave the way for atomic-scale components in future quantum computers.
10 years and counting: Updating scientific discoveries from the past
The American Chemical Society revisited key research advances from 2001, including self-healing plastics and carbon-based electronic devices. These discoveries have had lasting impacts on various fields of science.
Magnetic stimulation of brain may help some stroke patients recover
A new study found that magnetic stimulation can improve visual-spatial abilities in people with hemispatial neglect, a common condition after a right-sided stroke. The treatment, which uses transcranial magnetic stimulation, also restored balance to the brain's circuits and improved cognitive and movement abilities.
New path to flex and stretch electronics
Researchers develop cost-effective technique for fabricating flexible and stretchable backplanes using semiconductor-enriched carbon nanotube solutions. The technology enables the creation of artificial electronic skin capable of detecting and responding to touch.
Study challenges decades-old treatment guidelines for anorexia
A new study by UCSF researchers found that adolescents with anorexia nervosa who receive high-calorie diets during hospitalization experience significant weight gain and have a shorter stay. The current conservative approach, which starts with low calorie intake, is not effective in preventing refeeding syndrome.
Voltage increases up to 25 percent observed in closely packed nanowires at Sandia Labs
Scientists at Sandia Labs discover unexpected voltage increases of up to 25% in closely packed nanowires, which may impact the development of next-generation handheld devices and solar arrays. The findings also shed light on the unique properties of one-dimensional conductors and their interactions with electrons.
In new quantum-dot LED design, researchers turn troublesome molecules to their advantage
Harvard researchers develop a single-layer quantum-dot light-emitting device (QD-LED) that enables more effective control over electrical current flow and allows for diverse applications. The new architecture uses an insulating egg-crate structure to optimize the device's performance.
New FASTSAT discoveries paint detailed view of region near Earth
Scientists have compared MINI-ME's observations with those from two other instruments to reveal a host of interrelated phenomena occurring together in the dynamic region. The findings show that oxygen ions course outward along Earth's magnetic field lines, driving ion outflow events.
Catching tokamak fastballs: Controlling runaway electrons
Researchers at DIII-D National Fusion Facility have developed a method to control high-energy runaway electrons in tokamaks, which can potentially damage interior surfaces. By applying rapid pre-programmed changes in magnetic control coils, scientists can move the electron beam away from interior surfaces and prevent damage.
A 3-D way to release magnetic energy... fast!
Scientists at PPPL have discovered a new process that releases magnetic energy faster than expected by classical theories. The 3-D process involves the formation of high current ropes called flux ropes, which are ejected out of the reconnection region, leading to a sudden decrease in current density.
Feeling the heat: 30 tons of fine control for fusion plasmas
Researchers installed a movable 30-ton particle-beam heating system to develop fusion plasmas that can burn indefinitely. The system allows scientists to vary the spatial distribution of the plasma current to maintain optimal conditions for sustaining high-temperature plasmas needed for fusion energy production.
Discovery illuminates elusive proton channel gene in dinoflagellates
A team of scientists led by Thomas E. DeCoursey discovered a gene in dinoflagellates that controls voltage-gated proton channels, found also in humans and other species, with bioluminescence and potential applications in controlling deadly red tides
Electrochemistry controlled with a plasma electrode
Scientists at Case Western Reserve University create an electrochemical cell with a stable plasma electrode, allowing for controlled electron transfer and reducing losses. The technology has the potential to improve battery and fuel cell efficiency and enable new applications such as hydrogen production and nanomaterial synthesis.
NTU and A*STAR Institute of Microelectronics develop cheaper yet efficient thin film solar cells
Researchers have developed a new type of thin film solar cell that is cheaper but still efficient, using nanostructures to improve its power conversion efficiency. The cells can produce a current close to that of traditional solar cells made from costly silicon.
Scientists observe how superconducting nanowires lose resistance-free state
Researchers studied individual phase slips in aluminum nanowires, observing the nature and temperature at which they occur. The findings provide information to build ultra-thin superconducting wires without phase slips, which could play a role in ultra-miniaturized electronics.
An electronic bucket brigade could boost solar cell voltages
Researchers at Berkeley Lab create high-voltage photovoltaic effects in ferroelectric materials using an electronic bucket brigade. The study reveals a simple, periodic domain structure that enables efficient charge transport and increased voltage output.
Innovative superconductor fibers carry 40 times more electricity
Researchers at Tel Aviv University have developed innovative superconductors using sapphire fibers, capable of carrying 40 times more electricity than copper wires. This breakthrough has the potential to transform energy transfer, grid stability, and renewable energy collection.
Scientists put a new spin on traditional information technology
Researchers propose using silicon wires to encode information via electron spin, offering faster data transfer and lower energy usage. The new scheme may one day shape emerging technologies.
NIST uncovers reliability issues for carbon nanotubes in future electronics
Recent tests by NIST suggest device reliability is a major issue with carbon nanotubes. The material can sustain high current densities but slowly degrades under constant current, leading to circuit failures in about 40 hours.
Better, faster, cheaper: Doing business with the sun
Researchers from Fraunhofer-Gesellschaft develop innovative production methods using lasers to increase efficiency and reduce costs of solar cells. Thin-film solar cells with improved quality and reduced material usage are also being produced.
Solar cells get a boost from bouncing light
A new solar cell design boosts electricity generation by 26% through bouncing light, increasing the potential of dye-sensitized solar cells. The layered structure, consisting of micrometer-scale spheres and nanoscale particles, enhances light absorption and conversion efficiency.
Artificial lung mimics real organ's design and efficiency
Researchers at Case Western Reserve University have developed an artificial lung that uses air instead of pure oxygen, achieving efficiencies comparable to the genuine organ. The device is a significant step towards creating easily portable and implantable lungs, with potential use in humans within a decade.
Sounding rockets study how winds in space drive currents in the upper atmosphere
Scientists launch four NASA sounding rockets to collect data on charged particle motions and winds in the upper atmosphere. The experiment aims to understand how solar activity and electric fields drive these dynamo currents, essential for maintaining stable satellite communications and GPS signals.
Important step in the next generation of computing
Researchers at the University of Cambridge have developed a new, more efficient way of generating spin current using collective motion of spins called spin waves. This breakthrough addresses a major obstacle in spintronics, a technology that could radically change computing with high-speed, high-density and low-power consumption.
Nanotechnology makes big inroads into construction industry
Nano-sized particles of titanium dioxide create self-cleaning surfaces on buildings, while carbon nanotubes boost reinforced concrete strength. Nanotechnology also helps make concrete more sustainable by recycling fly ash, reducing environmental impact.
NIST 'catch and release' program could improve nanoparticle safety assessment
Scientists at NIST have developed a method to capture metal-based nanoparticles on a surface and release them at the desired moment, allowing for effective assessment of their toxicity in cell cultures. This approach enables precise delivery of particles to cells, mimicking real-world encounters, and reducing clumping issues.
Phase change memory-based 'moneta'system points to the future of computer storage
A new phase-change memory-based 'Moneta' system offers unprecedented performance, with read speeds up to seven times faster than current SSDs. The device uses PCM technology to store data in a metal alloy, providing lower latency and reduced energy requirements for high-performance computing applications.
Scientists looking to burst the superconductivity bubble
New research reveals that bubbles in the fabrication process of high-temperature superconductor Bi2212 limit its critical current density, blocking connectivity and reducing electrical resistance. Densification of filaments before melting could help eliminate bubble formation and improve material performance.
MIT researchers use virus to improve solar-cell efficiency
Researchers at MIT have developed a novel method to enhance solar-cell efficiency by utilizing viruses to assemble carbon nanotubes on a surface. This technique has shown significant improvements in power-conversion efficiency, with enhancements up to 10.6 percent.
Beams of electrons link Saturn with its moon Enceladus
Researchers at University College London have discovered powerful electron beams flowing back and forth between Saturn and its moon Enceladus, a finding that suggests a universal process similar to Jupiter's moon Io. This discovery was made using the Cassini spacecraft and its CAPS-ELS instrument.
New spin on graphene
Researchers at the University of Manchester have discovered a new way to interconnect electron spin and charge in graphene, enabling direct manipulation of electric current using microelectronics. This breakthrough has significant implications for spintronics, with potential applications in sensors, memories, and transistors.
Bitterness induces nausea, swallowing not required
A recent study published in Current Biology reveals that the taste of something extremely bitter can cause nausea and stomach churning, regardless of whether it's swallowed. The researchers found that the body anticipates toxins or anti-nutrients and prepares for them by responding with nausea and stomach contractions.
Carnegie Mellon researchers electrify polymerization
Carnegie Mellon University chemist Krzysztof Matyjaszewski and his team have developed a new method called electrochemically mediated ATRP, or eATRP, which allows for more precise control over the ATRP process. This breakthrough enables the creation of complex and specialized materials with tailored functionalities.
Blocking carbon dioxide fixation in bacteria increases biofuel production
Researchers found that blocking carbon dioxide fixation enables bacteria to produce more hydrogen gas, a promising biofuel. The Calvin cycle, responsible for carbon dioxide fixation, competes with hydrogen production for electrons.
Smarter memory device holds key to greener gadgets
Researchers at the University of Edinburgh have developed a tiny device that improves on existing forms of memory storage by using a mechanical arm to translate data into electrical signals. This allows for much faster operation and reduced energy consumption compared to conventional methods.
Taming the flame: Electrical wave 'blaster' could provide new way to extinguish fires
Scientists have discovered a way to extinguish fires using electrical waves, which could provide a new genre of fire-fighting devices. The technology could allow firefighters to put out fires remotely and save water, making it a promising solution for fighting fires in enclosed spaces.
Tying the knot with computer-generated holograms: Winding optical path moves matter
Researchers at NYU have created a new method for generating extended and knotted optical traps in three dimensions using computer-generated holograms. This breakthrough could lead to advancements in fusion energy and medical diagnostics, enabling the manipulation of small objects in complex 3D environments.
Ultra high speed film
Researchers from Kiel University have developed a new technique to record films of extremely fast processes, capturing phase transitions and catalytic reactions in solids. The technique uses ultra short flashes of light to make snapshots of electronic states, enabling new insights into relevant properties of solids.
Creasing to cratering: Voltage breaks down plastic
Researchers developed a protective substrate to observe polymer deformation, revealing creasing-to-cratering phenomenon under increased voltage. This breakthrough could lead to improved durability and efficiency of polymers in electrical applications.
New high-performance lithium-ion battery 'top candidate' for electric cars
Scientists have developed a new high-performance lithium-ion battery that stores large amounts of energy in a small space, making it suitable for powering electric vehicles. The innovative battery has a high rate capacity, enabling it to provide current even in extreme temperatures.
Compact high-temperature superconducting cables demonstrated at NIST
Researchers at NIST have developed compact high-temperature superconducting cables with improved strain tolerance, enabling thinner and more flexible cables for electric power grid applications. The new cables may also be used in scientific and medical equipment, as well as for military applications such as HTS power transmission.
New approach to solar cells
Researchers at the University of California - Davis have developed a new approach to solar cells by constructing them from extremely small nanoparticles. The team aims to achieve an efficiency of 42-65%, surpassing the current theoretical maximum of 31%.
New transistor for plastic electronics exhibits the best of both worlds
Researchers from Georgia Tech developed a new method to combine top-gate organic field-effect transistors with a bilayer gate insulator, allowing for stable operation in various environments. The transistor can be mass produced at lower temperatures and is compatible with plastic devices.
Wave power could contain fusion plasma
Researchers at the University of Warwick have confirmed a longstanding prediction that high-energy alpha particles will be key to generating fusion power in next-generation tokamaks. They found that LH waves, often used externally, can occur naturally in fusion plasmas and help exploit alpha particle energy.
'Smart grid' would save energy, cut costs for US consumers
A new smart grid system aims to optimize energy use, allowing consumers to control their appliances and use electricity during off-peak hours. The proposed 'time of use' pricing strategy could lead to significant cost savings for US households.
Electric current moves magnetic vortices
Researchers at TUM used neutrons to observe the coupling between electric current and magnetic structure in a material. The discovery of magnetic vortices shows promise for developing new data storage systems that are stable and can be written to using weakly anchored electric currents.
A 'spin ratchet': A new electronic structure for generating spin current
Researchers have demonstrated a device that controls electron spin motion without generating net electric currents. The spin ratchet concept could enable efficient spin-based data storage and processing, reducing energy consumption and heat generation.
Assessing the environmental effects of tidal turbines
University of Washington researchers are monitoring environmental impacts of large-scale tidal turbines in Puget Sound. The study aims to inform future tidal energy projects and minimize harm to marine life.
Manufacturing 'made to measure' atomic-scale electrodes
Scientists from Donostia-San Sebastian and Kiel universities develop method to control atom count in molecular unions, improving electric current flow. This breakthrough enables precise characterization of nanometric systems, resolving a key problem in nanotechnology.
Study assesses nuclear power assumptions
A study reviews nuclear power economics and concludes that the current fuel cycle is unsustainable due to uncertainty about waste management. Reprocessing and recycling of spent fuel is an alternative, but its implementation is controversial due to proliferation risks and high costs.
Psychologists make link between profitable law firms and yearbook photos of managing partners
Researchers found that law firms led by managing partners with powerful faces in college were more profitable, and that facial cues can predict success across a lifespan of approximately 20 years. The study used ratings from judges to measure perceived power and correlated them with firm profits.
Novel fuel cell catalyst lowers need for precious metal
Researchers have developed a novel fuel cell catalyst that uses large spheres of gold instead of platinum, reducing the need for precious metals. The catalyst retains its converting power and produces electricity at top capacity for longer periods than traditional small-particle models.
A new read on DNA sequencing
Biophysicist Stuart Lindsay's new technique uses recognition molecules to grasp each base in turn, generating a distinct electronic signal that identifies each base. This allows for the reading of individual bases without interference from neighboring bases, including recognition of epigenetic modifications.
Georgia Tech engaged in $100 million next-generation high-performance computing initiative
The DARPA Ubiquitous High Performance Computing (UHPC) initiative aims to revolutionize computing power and energy efficiency. Georgia Tech researchers are supporting key components of the $100M challenge, developing new approaches and technologies to redefine the future of computing. The goal is to make computing systems more reliable...
Getting to know the sun advances fusion research
Scientists successfully generated plasma current using Coaxial Helicity Injection, producing 1 million amperes of current with 40% less energy. This method eliminates the need for a solenoid in tokamaks, simplifying the device and optimizing its efficiency.
Current loss tracked down by magnetic fingerprint
Scientists at Helmholtz-Zentrum Berlin have developed a method to reveal how electricity is being lost in organic solar cells by manipulating the magnetic properties of charge-carrying particles. This breakthrough could lead to advancements in organic solar cell technology.
Electron billiards in nanoscale circuits
Scientists created a 70-nanometer narrow channel to analyze photogenerated electrons with high precision. They demonstrated that photogenerated electrons can flow several micrometers before colliding with crystalline atoms, revealing the influence of circuit geometry on electron paths.
New equation could advance research in solar cell materials
Researchers at the University of Michigan have developed a new equation that describes the relationship between current and voltage in organic semiconductors, which could enable advanced solar cells, thin OLED displays, and high-efficiency lighting. The equation provides fundamental insights into how charge moves in these materials.