Articles tagged with Microwave Radiation
Researchers at the University of Arizona have developed a new active metamaterial that demonstrates both power gain and negative refraction properties. This breakthrough enables the potential for high-performance microwave circuits and antennas with improved wireless communication and sensing capabilities.
Tropical Depression Nalgae's remnants are moving towards Vietnam with scattered areas of light to moderate rainfall. The system weakened rapidly after making landfall on Hainan Island, China, losing convection and maximum sustained winds of 20 knots.
Typhoon Nesat is expected to make landfall in the northern Philippines, bringing heavy rainfall, gusty winds, and dangerous surf. The storm has maximum sustained winds near 80 knots (92 mph/148 kmh) and is forecast to cross Luzon and move into the South China Sea.
A team of physicists evaluated the UK's caesium fountain clock, achieving an unprecedented level of accuracy. The new method improved uncertainties in Doppler shifts and microwave-lensing frequency shift, reducing errors to 2.3 × 10^-16.
Physicists at NIST have successfully linked the quantum properties of two separated ions by manipulating them with microwaves, enabling a new approach to simplify ion-trap quantum computers. The use of microwaves reduces errors introduced by laser beam instabilities and power fluctuations.
The Juno mission aims to resolve unanswered questions about the massive planet and its evolution. By analyzing microwave signals passing through Jupiter's atmosphere, scientists hope to understand how much water exists there.
Research suggests that physics principles may be used to create complex crop-circle patterns, with some teams reproducing damage using handheld magnetrons and microwaves. Crop-circle artists are believed to use invisible construction lines to design their work, dispelling the need for traditional tools.
Scientists at Delft University of Technology are developing a new toilet facility that uses microwave technology to transform human waste into electricity. The process involves drying, gasifying, and generating syngas, which is then fed to a fuel cell stack for electricity production.
Researchers at NIST have created a chip-scale, microwave version of an optics experiment that places a single microwave photon in two frequencies, or colors, at the same time. This experiment demonstrates quantum superposition and has potential applications for linear optical quantum computing.
Physicists at NIST generated microwave signals with improved purity and stability using a new optical frequency comb-based system. The apparatus has the potential to improve signal stability and resolution in radar, communications, and navigation systems, as well as certain types of atomic clocks.
Hurricane Beatriz developed an eye that opened on microwave imagery but closed on visible imagery, appearing to give satellites a 'wink' as it brought heavy rains and high surf to the southwestern Mexican coast. The storm strengthened into a hurricane by June 20 night and made landfall near Manzanillo, Mexico.
Researchers at NIST have demonstrated a unique fluid-tuned 'metasurface,' which can concentrate energy in a material and change its properties. The metasurface's resonant frequency can be tuned by adding purified water, allowing it to reflect, store, or transmit energy.
Researchers at CERN's ALPHA experiment have successfully trapped antihydrogen atoms for up to 1,000 seconds, or 16 minutes and 40 seconds. This achievement allows for spectroscopic experiments on the antiatoms, which could help determine if their electromagnetic and gravitational interactions are identical to those of normal matter.
A novel way to immobilise radioactive forms of iodine using a microwave has been discovered by Professor Neil Hyatt at the University of Sheffield. The method uses Pb5(VO4)3I, a solid material that can safely contain radionuclides like iodine-129, reducing long-term health risks from environmental release.
Researchers found that vivid ads can create false memories of product experience, leading to strong attitudes and confidence. Decreasing brand familiarity and shortening the time between viewing the ad and reporting evaluations reduced the false memories in participants.
Researchers at Sandia National Laboratories have developed a tiny atomic clock that is 100 times smaller and uses 100 times less power than its predecessors. The portable Chip Scale Atomic Clock (CSAC) has various specialized applications, including timing operations for miners and divers in deep-sea explorations.
Researchers developed a method to use passive microwave satellite imagery to monitor hurricane structure and intensity changes, revealing patterns in storm dynamics. This allows for a 30-hour window before a storm hits its maximum strength, enabling forecasters to issue earlier warnings and evacuate areas at risk.
Scientists have developed a new process that converts used motor oil into gasoline-like fuel using microwaves, offering an efficient and environmentally friendly alternative to traditional methods. The new method has excellent potential for commercial use and could help solve the problem of improper disposal of waste motor oil.
The Aqua satellite provided near-infrared/visible, infrared, and microwave light views of Ireland on March 3, 2011, capturing mostly clear skies with temperatures near normal for the time of year. The images revealed a cold front approaching from the west and showed navigable rivers extending inland.
Physicists at NIST have demonstrated an electromechanical circuit that processes information and controls motion at the quantum scale. The device uses a micro drum to transmit mechanical vibrations, achieving strong interactions between microwave light and the drum, paving the way for quantum applications.
Researchers have developed green chemical technologies to extract valuable chemicals from biomass, reducing waste and increasing product quality. These innovations can be used in various applications, including construction and bioprocessing.
NASA's Aqua satellite reveals Tropical Storm Dianne is getting organized, with bands of thunderstorms wrapping into the center indicating strengthening. The Joint Typhoon Warning Center expects Dianne to intensify and move south on Feb. 18 while remaining well west of the Australian coast.
NASA's Terra satellite captured an image of Tropical Storm Bingiza showing strong thunderstorms and a well-defined low-level circulation center. The storm is intensifying slowly and expected to meander over the next couple of days before strengthening towards central Madagascar.
Researchers at Rice University have developed a highly sensitive microwave detector using ultrapure gallium arsenide semiconductors. The discovery could enable the creation of next-generation computers with higher clock speeds, potentially reaching 100 GHz.
Researchers have developed a non-invasive technique using microwaves to measure vital signs, such as heart rate and stress levels. The system detects changes in reflected waves caused by body movements, allowing for near-real-time monitoring.
Researchers at the National Institute for Nanotechnology developed a new method using microwave ovens to accelerate the self-assembly process for semi-conductors. This technique significantly reduces processing time, creating a viable alternative to conventional lithography methods.
Scientists from Friedrich-Schiller-University Jena developed a new process to grow carbon nanotubes on scanning probe tips, utilizing microwave radiation for rapid growth. The method improves the fabrication of sharp atomic force microscopy tips, reducing costs and enabling routine measurements.
Tropical Storm Otto formed over the Atlantic Ocean after two changes in less than 24 hours. NASA's TRMM and Aqua satellites detected cold, high thunderstorm cloud tops and heavy rainfall near the storm.
Researchers have successfully made tiny high-frequency capacitors using a complex mineral, paving the way for high-frequency microwave applications. The capacitors, made from barium strontium titanate, exhibited excellent microwave properties up to 40 GHz.
Tropical Storm Lisa is currently a tropical storm with maximum sustained winds near 50 mph, forecast to weaken due to colder waters and strong wind shear, then become a remnant low pressure system in the eastern Atlantic by early next week.
The article discusses a new approach to breast cancer detection using microwave tomography, which is cheaper and less invasive than traditional X-ray mammography. The method uses mathematical models to reconstruct images of the breast based on electrical conductivity properties.
Researchers have created a low-cost, human-focused land mine detection system using microwave-based sensors to detect vibrations remotely. The system costs around $10,000, compared to $1 million for laser-based Doppler remote detection systems.
Researchers in China develop electromagnetic absorbing device for microwave frequencies using metamaterials, demonstrating an absorption rate of 99%. The device traps and converts electromagnetic waves into heat, exhibiting properties similar to an 'electromagnetic black hole',
The Northern Indian Ocean cyclone season has begun with two tropical storms forming within a day of each other. Tropical Storm 02A had maximum sustained winds of 39 mph and was expected to track west-northwest and bring rains and wind to Yemen.
The second tropical depression of the northwestern Pacific season has formed, located about 235 miles east-southeast of Yap, Micronesia. Strong convection and thunderstorms are expected, generating 10-foot high waves and high surf across the region.
A new study led by Alexander Kashlinsky at NASA's Goddard Space Flight Center reveals that a collective motion dubbed the 'dark flow' persists to much greater distances -- as far as 2.5 billion light-years away.
NIST's new aluminum-based quantum logic clock outperforms previous mercury atom clocks by more than twice its precision, achieving accuracy within 17 decimal places. The enhanced logic clock uses a different type of partner ion to improve efficiency and sets the stage for future time standards.
Tropical Storm Fami formed rapidly over the southern Indian Ocean, making landfall in Madagascar with sustained winds near 46 mph. The storm's eye feature suggests it is maintaining strength, fueled by tropical moisture from surrounding warm waters.
Nida's center of circulation is exposed and the storm is losing its circular shape due to wind shear. System 97W is showing signs of potential tropical cyclone formation, with forecasters upgrading its likelihood to 'fair'.
Researchers at Max Planck Institute for Astrophysics create a system called information field theory (IFT) to reconstruct incomplete image data. IFT asks two questions to determine the probability of images based on measured data and prior knowledge, allowing for optimal reconstruction in areas where telescopes are blind.
Heavy rainfall is already affecting sections of central and northern Philippines due to Typhoon Mirinae's approach. The storm's strong convection and thunderstorms bring moderate to heavy rainfall over eastern sections.
Typhoon Mirinae is intensifying as it moves away from the Northern Marianas Islands and is expected to make landfall in the Philippines by Saturday. The storm's maximum sustained winds have increased to 98 mph, with a developing eye and strong thunderstorm development.
Tropical Storm Mirinae is strengthening and developing an eye in the Pacific Ocean. The storm's winds near 52 mph indicate intensification, with cold cloud temperatures suggesting heavy precipitation.
Typhoon Lupit is expected to make a brief landfall in northern Luzon, the Philippines on October 22. The storm's eye is forecast to hit around 8 p.m. local time, bringing strong winds and heavy rainfall to the region.
Tropical Storm Neki formed near Johnston Island with maximum sustained winds of 40 mph; forecasters predict strengthening into a hurricane as it moves northwest, passing close to the island on October 21.
Tropical Depression 18-E forms in the Eastern North Pacific with maximum sustained winds near 35 mph, located 580 miles west-southwest of Baja California. Forecasters predict little growth into a tropical storm due to unfavorable wind conditions and cooler waters on its northward track.
NASA satellites Aqua, Terra, and Tropical Rainfall Measuring Mission (TRMM) are monitoring Super Typhoon Parma, which has intensified into a Category Four Typhoon. The storm is expected to further intensify prior to landfall on the northeastern coast of Luzon.
Typhoon Choi-Wan is expected to bring hurricane-force winds and flooding rains to Japan this weekend. The storm's high thunderstorms have reached the tropopause, resulting in extremely heavy rainfall for the area underneath.
The Planck space telescope has returned its first images of the sky, mapping tiny differences in microwave radiation left over from the Big Bang. This improved data will allow scientists to better understand the structure of the universe when it was about 400,000 years old and test theories about cosmic inflation.
Researchers at the University of Michigan have invented a new type of magnetron that holds potential for more compact microwave sources with faster start-up times. The invention could lead to improved radar resolution and airborne applications, benefiting the Air Force's radar capabilities.
NASA's Aqua satellite revealed extremely high thunderstorms in Typhoon Choi-Wan as it approached the island of Sai-Pan. The typhoon is expected to bring heavy rainfall and strong winds to the area, with storm surge and inundation possible along shorelines.
Hurricane Linda is expected to weaken due to cooler waters and wind shear, with a 10% opening in her eyewall revealed by NASA's Aqua satellite. The storm's maximum sustained winds near 85 mph are weakening, and tropical storm force winds extend out 140 miles from the center.
Hurricane Bill is intensifying due to increased rainfall, with its eye widening and wind speeds reaching 105 mph. The storm is expected to strengthen into a Category Three hurricane, making it a major threat to the Leeward Islands.
A new dark energy model proposes a cosmological phase transition, where the universe 'froze' about 11.5 billion years ago, causing it to expand at an ever-increasing rate. This theory attributes dark energy to a field dubbed quintessence, which acts as an antigravity agent and is spread uniformly throughout space.
Researchers have proposed a novel optical clock concept that enables more stable clocks, sub-natural linewidth laser spectroscopy, and long coherence time lasers. The lasing behavior of the active optical clock is described by the modified Schawlow-Townes linewidth formula, which narrows the linewidth due to collective emission from ga...
A new method developed at the Physikalisch-Technische Bundesanstalt (PTB) improves the stability of caesium fountain clocks by reducing measurement times and increasing accuracy. This is achieved through the use of a microwave oscillator stabilized with lasers, allowing for more precise frequency measurements.
A team of Caltech researchers proposes a mathematical model explaining an anomaly in the universe's radiation and matter distribution. The model predicts more cold than hot spots in the Cosmic Microwave Background radiation, which could offer insights into what happened during inflation and potentially even what came before the Big Bang.
University of Florida engineering researchers have built a prototype baby monitor that uses Doppler radar to remotely scan the in-and-out movement of a baby's chest due to respiration. The system can detect when a baby stops breathing and sends an alarm to a portable unit kept by parents.
Researchers at NIST and JILA have created a tunable 'noiseless' amplifier that can significantly reduce uncertainty in delicate measurements of microwave signals. This amplifier could enable faster, more precise measurements in quantum computers and communications systems.
Northern Greenland experienced extreme snowmelt during summer 2008, with melting days 18 days longer than previous maximum values. Ground measurements confirm surface/air temperatures up to 3°C above average, contributing to record melting index.