Results 71 to 80 of about 926,286 (251)
Frontiers in Astronomy and Space SciencesPoleward Boundary Intensifications (PBIs) are transient auroral brightenings at the poleward edge of the auroral oval that serve as optical tracers of nightside plasma transport and energy deposition.
Yu-Lin Fang +14 more
doaj +1 more source
On the relations between proton influx and D-region electron densities during the polar-cap absorption event of 28-29 October 2003 [PDF]
, 2005 International audienceObservations by incoherent-scatter radar have been applied to explore relationships between the fluxes of incident protons and the resulting D-region electron densities during a polar-cap radio-absorption event.
Birch, M. J. +4 more
core +2 more sources
Advanced Functional Materials, EarlyView.A post‐growth method is demonstrated to realize energy‐tunable quantum emitters in GaAs/GaAsN/GaAs core–multishell nanowires on a Si substrate. By combining the N‐induced bandgap reduction with H‐ion irradiation, the GaAsN potential landscape is engineered, enabling isolated, narrow emission lines that function as single‐photon sources with g(2)(0) ∼ 0.
Akant Sagar Sharma +10 more
wiley +1 more source
A new method of studying the relation between ionization rates and radio-wave absorption in polar-cap absorption events [PDF]
, 2005 International audienceDuring polar-cap absorption events, which are caused by the incidence of energetic solar protons, the high-latitude ionospheric D region is extended down to relatively low altitudes. While the incoming proton fluxes may be monitored
Hargreaves, J. K., J. K. Hargreaves
core +2 more sources
Characteristics and Generation Mechanism of Polar Cap Patch: Multi-instrument Observations
, 2022 This dissertation includes studies on the generation mechanisms and plasma characteristics of polar cap patches and ion upflows in the high-latitude ionosphere, which is a region that involves dynamic processes reflecting the coupling of the solar wind ...
Ren, Jiaen
core +1 more source
Modelling the propagation of polar cap patches
, 2021 Space weather explores dynamics between the Sun- interplanetary medium and the Earth’s magnetosphere and upper atmosphere. Space weather is known for causing disturbances in Global Navigation Satellite Systems (GNSS) and these disturbances are rapid changes in the amplitude and phase of a signal that a receiver receives, known as scintillations.
openaire +1 more source
3D‐Printed Gradient Shape‐Memory Strain Sensors With Rewritable Gauge Factors
Advanced Functional Materials, EarlyView.A 3D‐printed shape‐memory strain sensor combines thermomechanical programming with gradient architectural design. Preset strain rewrites the gauge factor (GF), while the gradient geometry amplifies the response through strain redistribution. Reprogrammable sensitivity enables the same sensor to detect weak pulse signals and monitor large‐amplitude ...
Xuan Zhang +10 more
wiley +1 more source
A Miniaturized Autonomous Thermomagnetic Generator
Advanced Functional Materials, EarlyView.Micro, autonomous and high power thermomagnetic generator operating between a heat dissipator and a processor. ABSTRACT Thermomagnetic generators (TMG) are promising devices for converting low‐grade waste heat into electricity. Self‐actuation using permanent magnets is the key to autonomy.
Morgan Almanza +11 more
wiley +1 more source
Tantalum–Palladium Ultrathin Resistance Hydrogen Sensor
Advanced Functional Materials, EarlyView.Nanoconfined Ta‐alloy thin films enable fast, reversible hydrogen sensing by suppressing unwanted phase transitions. A Ta0.88${\rm Ta}_{0.88}$Pd0.12${\rm Pd}_{0.12}$ sensing layer delivers hysteresis‐free detection from ppb to 100% H2${\rm H}_2$ at room temperature.
Folkert Isaäc Bernhard Straus +2 more
wiley +1 more source
Advanced Healthcare Materials, EarlyView.Recent advances in microfluidic technologies for microgel fabrication are critically reviewed, highlighting the capabilities and limitations of major microfluidic platforms and discussing how platform design, material selection, and crosslinking strategies influence microgel architecture and functionality. Current challenges and future opportunities in
Afshin Abrishamkar +6 more
wiley +1 more source