Articles tagged with Oscillations
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Scientists directly observed frequency Bloch oscillations in a modulated fibre loop using dispersive Fourier transformation. They achieved a maximum frequency shift up to 82 GHz and broadened the input pulse bandwidth up to 312 GHz.
Researchers found 300 genes associated with neural oscillations, including hub genes that control separate gene networks. Surprisingly, several of these hubs were active in glial cells, which support and protect nerve cells. This discovery provides an entry point for further research into the underpinnings of human memory.
A team of climate scientists has found that the apparent 'Atlantic Multidecadal Oscillation' is likely an artifact of climate forcing, specifically from greenhouse gases. Volcanic eruptions in past centuries caused initial cooling and a slow recovery, resulting in a roughly 60-year oscillation.
Researchers at Max Born Institute observe terahertz radiation from electrons localized in liquid water, displaying a frequency between 0.2 and 1.5 THz. The emission persists for up to 40 ps, with surprisingly weak damping, allowing for potential manipulation.
A study published in PNAS found that theta oscillations in the human brain, generated by the hippocampus, play a crucial role in active learning and memory formation. Active navigation improves learning efficiency, while two consecutive phenomena, encoding and retrieval, are facilitated by theta phase code.
An Australian-led team of physicists successfully created sloshing quantum liquids, revealing wavy motion and superfluid properties. The experiment provided insights into the speed of sound and potential effects on superfluidity, shedding light on a promising hybrid light-matter system for ultra-low-energy electronics.
Researchers have discovered a promising mechanism to create nanoelectronics components by reducing current to zero in quantum point contacts. The discovery uses external oscillating fields and provides evidence of non-equilibrium phase transitions, enabling precise control of charge transport.
Scientists have successfully determined the strength of exciton-phonon coupling in 2D materials at room temperature, a crucial step towards optimizing their applications. This breakthrough was achieved using a novel method called coherent 2D microscopy, which combines high spatial resolution with femtosecond time resolution.
Researchers found a new lasing mechanism in water droplets that can record subtle biomolecular interactions and dynamics. The mechanism is sensitive to interfacial molecular forces, allowing for the amplification of changes in laser emission characteristics.
Researchers identified a novel coupling mechanism linking neuronal networks using human intracerebral recordings, revealing high-frequency oscillations synchronize across multiple brain regions.
Researchers have identified electrical oscillations in Parkinson's patients' scalps that are coupled with brain activity, suggesting a key to understanding the disease's characteristic movement slowing. The study's findings could lead to novel therapies and shed light on the connection between cognitive disorders and motor symptoms.
Researchers demonstrate the existence of exotic Bloch oscillations in crystals with intrinsic non-Abelian fields, characterized by a multiplication of the oscillation period. These phenomena are perfectly synchronized with internal states of the crystal and shed new light on topological quantum matter.
Researchers from Nanjing University of Information Science & Technology evaluate subseasonal prediction skill for heatwaves in Yangtze River basin using long-term hindcast data from three operational models. They found that superior model fidelity is crucial to predicting heatwave occurrence, intensity and duration at longer lead times.
The satellite detected a low-frequency quasi-periodic oscillation (QPO) above 200 keV in a black hole binary, indicating the presence of a relativistic jet near the event horizon. The discovery resolves the long-running debate on the physical origin of low-frequency QPOs.
Researchers use Poincaré sections to simplify chaotic behavior, revealing underlying symmetry and structure. This insight enables a deeper understanding of quantum chaos and potential links between classical and quantum physics.
Researchers at Instituto de Astrofísica de Canarias confirm the presence of resonating cavities above sunspots. These cavities, similar to those found in wind instruments or guitar strings, trap certain frequencies and cause resonances.
Researchers from Université de Genève demonstrate a causal relationship between brain oscillations at 30 Hz and phoneme processing essential for reading. Non-invasive brain electrical stimulation improves phonological deficits and reading accuracy in adults with dyslexia, paving the way for targeted non-invasive therapeutic interventions.
Researchers have developed a weakly nonlinear waveguide that allows the stable propagation of azimuthons, which can exhibit Rabi oscillation. This technology enables new possibilities for encoding and encrypting optical information, and has potential applications in photonics and other fields.
Cristiana Stan and collaborators develop new diagnostic tools to forecast ENSO patterns. The tools aim to better understand the relationship between ENSO and the Madden-Julian Oscillation.
A recent study published in npj Climate and Atmospheric Science reveals remarkable skill in reproducing multi-annual variations of North Atlantic Oscillation (NAO) and atmospheric blocking frequency. This breakthrough suggests that impactful climate anomalies may be predictable with improved dynamical models, filling the gap between lo...
A study suggests that COVID-19 data patterns are driven by variations in testing and reporting practices, rather than social interactions or healthcare quality. The researchers found that changes in reporting methods, such as the timing of death reports, can cause fluctuations in case numbers.
A team of scientists has developed a new parametric oscillator in the optoelectronic domain with unique phase-controlled operation, enabling stable and tuneable multimode oscillation. This allows for applications in microwave signal generation, oscillator-based computation, and radio-frequency phase-stable transfer.
Marina Domracheva and Sofya Kulikova discovered a new method to analyze perceived similarity of food products using electroencephalography signals. They found that the power of gamma oscillations can reflect similarities in a cross-modal approach, providing a useful tool for neuromarketing studies.
Researchers from UNIGE developed a computational model that reproduces the brain's mechanism for analyzing spoken language. The model uses predictive coding to optimize perception by constantly trying to predict sensory signals. It has successfully recognized thousands of syllables in hundreds of sentences, validating the idea that neu...
Researchers from ITMO University have proposed a new data encoding method for the 6G standard using terahertz pulses. The method involves extending the pulse in time to increase its duration and achieve interference between two chirped pulses, enabling faster data transfer.
A multivariate analysis of sea level data reveals that barystatic and steric contributions drive most interannual variability in GMSL, with ENSO playing a significant role. The study highlights the magnitude of these contributions associated with ENSO events.
Researchers from Waseda University found damped, low-amplitude circadian oscillations in cyanobacteria lacking KaiA, challenging previous studies. The findings suggest the circadian clock may have evolved gradually from these oscillations.
A new measuring method called Higgs spectroscopy helps understand the dynamics of paired electrons in superconductors, revealing typical precursors of superconductivity even above the critical temperature. The technique uses a multi-cyclic terahertz pulse to excite Higgs oscillations and measure them precisely.
The T2K Collaboration has published new results showing the strongest constraint yet on the parameter governing the breaking of matter-antimatter symmetry in neutrino oscillations. The analysis of data collected through 2018 reveals a significant enhancement of the oscillation probability of neutrinos, favoring values close to δcp=90º.
EMBL scientists examined the molecular causes of a rare hereditary disease of the spine and ribs, revealing that errors in the segmentation clock can cause disorders. The researchers created a lab system to study this process, demonstrating that specific gene mutations, such as DLL3, are responsible for the condition.
Researchers analyzed climate data from 1951-2018 and found changes in the Pacific Decadal Oscillation and North Pacific Gyre Oscillation indices. These changes resulted in reduced relevance of these indices to ecological variability in the Pacific Ocean.
A study reveals a half-orbital precession cycle in thermocline temperature linked to El Niño-Southern Oscillation fluctuations. The thermocline is identified as a key driver of climate change on orbital timescales.
Researchers successfully measured and controlled the length of the Kondo cloud, a phenomenon discovered in the 1930s that explains resistance increase in certain metals. The findings provide insights into multiple impurity systems, including high-temperature superconductors.
A study by Ellen A. R. Welti and colleagues found that nutrient dilution in plants contributes to the decline of insect herbivores like grasshoppers. Climate cycles, such as El Niño Southern Oscillation, accounted for 40-54% of grasshopper population variation.
A recent study reveals that natural climate cycles significantly influence the base of the food web along the California coast. Climate changes can alter the timing and prevalence of phytoplankton and harmful algal blooms, which are crucial for understanding ecosystem responses to ocean warming.
Researchers at Osaka University discovered that the tadpole-like tunicate Oikopleura dioica uses calcium ion oscillation and right-sided Bmp gene expression to develop left-right asymmetry. Notably, the species lacks the Nodal gene found in other chordates.
Researchers from Mainz physicists reveal that the next generation of neutrino experiments may solve the neutrino mass ordering puzzle within three to seven years. The IceCube Upgrade and JUNO collaboration has demonstrated the effectiveness of a complementary experimental approach.
Researchers developed a new method to analyze short beta wave bursts in real-time, associated with rats' movements and behavior. The study shows that increasing the recurrence of these bursts can improve motion control and neuroprosthetics.
Researchers identify excessive brain activity in the cerebellum as the source of essential tremor, a condition affecting 4% of people over 40. Using neuromodulation techniques, such as transcranial direct-current stimulation or drugs to reduce transmission between nerve cells, may provide new treatment options.
Physicists have developed a novel detector that precisely determines the oscillation profile of light waves, enabling research on dynamic processes at molecular levels. The new technique allows for real-time investigation of molecule responses to intense light fields.
A recent study published in Science Advances finds that global warming is the primary cause of extensive wildfires in Siberia. The research reveals that climate conditions, such as changes in atmospheric pressure and temperature, play a crucial role in fire spread.
A team of meteorologists found no consistent evidence for decadal oscillatory signals in global surface temperature observations. The researchers suggest that any apparent oscillation may be due to external influences like greenhouse gas and aerosol emissions. The study has implications for decade-scale climate predictability.
A team of researchers observed regular oscillations in the populations of rotifers and green algae over a period of one year, corresponding to more than 50 cycles. The oscillations were repeatedly interrupted by short periods without discernible external influences, but always returned to their normal rhythm on their own.
Experiments by McGill University and University of Oldenburg confirm regular oscillations in predator-prey populations can persist without complete depletion of prey resources. The study found that less efficient predators can lead to prey recovery, potentially creating endless cycles.
Global warming affects Pacific Decadal Oscillation (PDO) predictability, leading to less time for gains in strength and intensity. This challenges regional climate forecasting on multi-year timescales.
Researchers found that fluctuations in the North Atlantic Oscillation have cost New England fishermen their jobs, with an average loss of 16% of fishing jobs in coastal counties. This effect is distinct from other factors affecting the industry.
Research by Princeton University shows a reversal of global terrestrial stilling, with wind speeds in northern mid-latitude regions increasing by 7% since 2010. This trend has significant implications for wind power generation, predicting a 17% increase in energy production and a potential 37% increase by 2024.
A new 3D printing technique enables fast fabrication of microlens arrays with precise optical surfaces, overcoming existing limitations. The method combines oscillation-assisted digital light processing (DLP) and grayscale UV exposure to produce uniform lenses with high surface smoothness.
Engineered E. coli bacteria using transcriptional circuits from Rice lab researchers can synchronize gene expression across large distances, enabling collective action in community settings. The discovery could lead to treatment of gut microbiome conditions and interaction with bioelectronics.
A new study by UC San Francisco researchers reveals that two distinct types of slow brain waves, slow oscillations and delta waves, compete to determine whether new information is consolidated or forgotten. Disrupting one type of wave enhances memory retention, while disrupting the other leads to forgetting.
Scientists have discovered log-periodic quantum oscillations in topological material ZrTe5, exhibiting discrete scale invariance. The phenomenon is attributed to supercritical atomic collapse and quasi-bound states, offering new insights into the universality of this effect.
A team of scientists at Northern Illinois University successfully forecasted the nation's extensive tornado outbreak in late May 2019, three to four weeks before it occurred. The prediction used historical weather-pattern records and methodologies to predict severe weather across the continental United States with extended lead times.
Researchers at the Netherlands Institute for Neuroscience have found that congenital nystagmus is caused by electrical oscillations in retinal neurons. The study shows that defects in just a few proteins result in erroneous movement signals sent to the brain, leading to the oscillating eye movements characteristic of the condition.
Spin-torque oscillators, used to generate microwaves, are unstable when connected in series due to random fluctuations that can suppress or destroy the oscillations. The new study suggests alternative methods for robust microwave generation on the macro scale.
Researchers have confirmed that ions can be heated by plasma oscillations driven by high-energy particles using a new hybrid-simulation program. This breakthrough accelerates studies of plasma self-heating for realizing fusion energy.
Researchers discovered theta oscillations play a role in navigation and memory formation, reactivating location-specific activity patterns during virtual reality navigation. This finding may help identify novel biomarkers for neurological disorders like Alzheimer's.
Researchers at Mainz University have developed a new method to detect axions, a type of dark matter, using the Cosmic Axion Spin Precession Experiment (CASPEr) program. By exploiting nuclear magnetic resonance and sophisticated shielding, the team aims to identify spin changes caused by dark matter, which can be distinguished from thos...
An international team, led by Australian researchers, has published a first-of-its-kind study assessing the major drivers of global marine heatwaves. They found that known climate phenomena, such as El Niño and North Atlantic Oscillation, can increase the odds of marine heatwaves in other regions thousands of kilometres away.
Research groups investigate KaiA and KaiC proteins' interplay to generate circadian oscillation in cyanobacteria. They find that KaiC degrades ATP within its ring structure, triggering the 'fishing a line' mechanism.
Researchers found that visual stimulation can prevent neuron degeneration and enhance synaptic function in Alzheimer's disease models. The treatment also improved spatial memory performance in older mice without a predisposition for the disease.