A novel UV, moisture and magnetic field triple-response smart insulating material achieving high targeted self-healing based on nano-functionalized microcapsules

Nanoscale ◽  
2021 ◽  
Author(s):  
Potao Sun ◽  
Fengqi Liu ◽  
Wenxia Sima ◽  
Tao Yuan ◽  
Ming Yang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Mechanical Stress ◽  
Electric Fields ◽  
Self Healing ◽  
Insulating Material ◽  
Term Operation ◽  
Insulation Materials ◽  
Electrical Trees ◽  
Strong Electric Fields

During the long-term operation of solid insulation materials, strong electric fields and mechanical stress cause electrical trees and cracks that are undetectable and irreversible, leading to the failure of electronic...

scholarly journals Non-magnetic aspect sensitive auroral echoes from the lower E region observed at 50 MHz

1999 ◽  
Vol 17 (10) ◽  
pp. 1284-1292 ◽  
Author(s):  
R. Rüster ◽  
K. Schlegel
Keyword(s):  
Magnetic Field ◽  
Electric Fields ◽  
Middle Atmosphere ◽  
Magnetic Field Direction ◽  
Ionosphere Plasma ◽  
E Region ◽  
Strong Electric Fields ◽  
Gradient Drift ◽  
Drift Instability ◽  
The Magnetic Field

Abstract. Backscatter from E-region irregularities was observed at aspect angles close to 90° (almost parallel to the direction of the magnetic field) using the ALOMAR SOUSY radar at Andoya/Norway. Strong electric fields and increased E-region electron temperatures simultaneously measured with the incoherent scatter facility EISCAT proved that the Farley-Buneman plasma instability was excited. In addition, strong particle precipitation was present as inferred from EISCAT electron densities indicating that the gradient drift instability may have been active, too. Backscatter at such large aspect angles was not expected and has not been observed before. The characteristics of the observed echoes, however, are in many aspects completely different from usual auroral radar results: the Doppler velocities are only of the order of 10 m/s, the half-width of the spectra is around 5 m/s, the echoes originate at altitudes well below 100 km, and they seem to be not aspect-sensitive with respect to the magnetic field direction. We, therefore, conclude that the corresponding irregularities are not caused by the mentioned instabilities and that other mechanism have to be invoked.Key words. Ionosphere (plasma waves and instabilities; ionosphere irregularities; particle precipitaion) · Meteorology and atmospheric dynamics (middle atmosphere dynamics)

scholarly journals Study on the molecular structure evolution of long-term-operation XLPE cable insulation materials

2022 ◽  
Vol 8 ◽  
pp. 1249-1256
Author(s):  
Sichen Qin ◽  
Rui Liu ◽  
Qian Wang ◽  
Xi Chen ◽  
Zicai Shen ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Structure Evolution ◽  
Cable Insulation ◽  
Xlpe Cable ◽  
Term Operation ◽  
Insulation Materials

scholarly journals Magnetic control of structural changes in structural steels during plastic deformation

2020 ◽  
Vol 164 ◽  
pp. 08023
Author(s):  
Valeriy Gordienko
Keyword(s):  
Magnetic Field ◽  
Plastic Deformation ◽  
Structural Changes ◽  
Microstructural Analysis ◽  
Structural Steels ◽  
Cold Plastic Deformation ◽  
Metal Structures ◽  
Term Operation ◽  
The Relationship

The analysis and consideration of the influence of the main factors on the damage of welded metal structures during long-term operation. The relationship between the strength of the magnetic field of the Hр scattering and structural changes in structural steels that occur during cold plastic deformation to different degrees is established. It is shown that at small degrees of deformation, the change in the magnetic parameter Hр is large. As they increase, the HP value decreases and tends to the values of the Earth's magnetic field. The data of microstructural analysis of the metal of structural steels are in good agreement with the results of the passive ferrosonde method of control. A method for evaluating the effect of cold plastic deformation on the magnetic properties of metal in structural steels has been developed.

scholarly journals Magnetic field stimulation: the brain as a conductor

2012 ◽  
Author(s):  
Kent Davey
Keyword(s):  
Magnetic Field ◽  
Electric Fields ◽  
Neurological Disorders ◽  
Magnetic Stimulation ◽  
Theoretical Base ◽  
Field Stimulation ◽  
Response Characteristics ◽  
Strong Electric Fields ◽  
Stimulation System ◽  
The Brain

For the purposes of magnetic stimulation, the brain can be treated as a homogeneous conductor. A properly designed brain stimulation system starts with the target stimulation depth, and it should incorporate the neural strength–duration response characteristics. Higher-frequency pulses require stronger electric fields. The background of this article is the theoretical base determining, where in the brain TMS induces electrical activity, and whether this shifts as a function of differences in the conductivity and organization of gray matter, white matter, and cerebrospinal fluid. The use of strong electric fields to treat many neurological disorders is well established. Both in the treatment of incontinence and clinical depression, the electric field should be sufficiently strong to initiate an action potential. The frequency, system voltage, capacitance, core stimulator size, and number of turns are treated as unknowns in a TMS stimulation design. This article presents the possible topological changes to be considered in the future.

Evolution of Large-Scale Coronal Structures

1994 ◽  
Vol 144 ◽  
pp. 29-33
Author(s):  
P. Ambrož
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Large Scale ◽  
Coronal Magnetic Field ◽  
Source Surface ◽  
Solar Cycles ◽  
Characteristic Relationship ◽  
The Magnetic Field ◽  
Coronal Structures

AbstractThe large-scale coronal structures observed during the sporadically visible solar eclipses were compared with the numerically extrapolated field-line structures of coronal magnetic field. A characteristic relationship between the observed structures of coronal plasma and the magnetic field line configurations was determined. The long-term evolution of large scale coronal structures inferred from photospheric magnetic observations in the course of 11- and 22-year solar cycles is described.Some known parameters, such as the source surface radius, or coronal rotation rate are discussed and actually interpreted. A relation between the large-scale photospheric magnetic field evolution and the coronal structure rearrangement is demonstrated.

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