Electromagnetic Properties of Soils

1997 ◽  
Vol 500 ◽  
Author(s):  
J. C. Sant Amarina ◽  
K. A. Klein
Keyword(s):  
Magnetic Permeability ◽  
Electromagnetic Waves ◽  
Cement Hydration ◽  
Low Frequency ◽  
Skin Depth ◽  
Electromagnetic Properties ◽  
Laboratory Techniques ◽  
Soil Cement ◽  
Permittivity Measurements

ABSTRACTElectromagnetic waves can be used to characterize geomaterials and to monitor geo-processes. Permittivity, conductivity, and magnetic permeability measurements provide complementary information. Furthermore, events at different frequencies, such as the various polarization mechanisms, suggest multiple internal scales within materials. Three laboratory studies are presented: characterization of kaolinite-water mixtures with permittivity data, monitoring soil-cement hydration with conductivity measurements, and characterization of kaolinite-iron mixtures with magnetic permeability data. Laboratory techniques face inherent limitations, in particular, low frequency permittivity measurements of highly conductive specimens are not feasible. Likewise, field techniques are restricted by the compromise between the desired resolution and the achievable skin depth.

scholarly journals Propagation of electromagnetic waves in extremely dense media

2017 ◽  
Vol 32 (15) ◽  
pp. 1750081 ◽  
Author(s):  
Samina Masood ◽  
Iram Saleem
Keyword(s):  
Magnetic Permeability ◽  
Electromagnetic Waves ◽  
Chemical Potential ◽  
Longitudinal Component ◽  
Renormalization Scheme ◽  
Electromagnetic Properties ◽  
Electric Permittivity ◽  
Stellar Objects ◽  
Dense Media ◽  
Exotic Systems

We study the propagation of electromagnetic (EM) waves in extremely dense exotic systems with very unique properties. These EM waves develop a longitudinal component due to interactions with the medium. Renormalization scheme of QED is used to understand the propagation of EM waves in both longitudinal and transverse directions. The propagation of EM waves in a quantum statistically treatable medium affects the properties of the medium itself. The electric permittivity and the magnetic permeability of the medium are modified and influence the related behavior of the medium. All the electromagnetic properties of a medium become a function of temperature and chemical potential of the medium. We study in detail the modifications of electric permittivity and magnetic permeability and other related properties of a medium in the superdense stellar objects.

scholarly journals Electromagnetic-Deformation Response of the Crust

2018 ◽  
Vol 62 ◽  
pp. 03003
Author(s):  
Vladimir Uvarov
Keyword(s):  
Electromagnetic Waves ◽  
Low Frequency ◽  
Earth’S Crust ◽  
Electromagnetic Properties ◽  
Acoustic Oscillations ◽  
Deformation Response ◽  
Electromagnetic Oscillations ◽  
Earth's Crust ◽  
Favourable Environment ◽  
Saturated Structure

The analysis of mechanic-electromagnetic effects of the Earth’s crust made it possible to distinguish the relation of rock induced polarization with its deformation. On the basis of these relations, their generalized description is made. It is shown that, although the Earth’s crust is an energy-saturated structure in a critical state, but owing to electromagnetic properties, it is not a medium in which electromagnetic oscillations can be generated in the low-frequency region. At the same time, the Earth’s crust is favourable environment for the occurrences of seismo-acoustic oscillations. It is shown that the mechanisms of mechanic-electromagnetic transformations of the crust generate electromagnetic waves accompanying seismic-acoustic disturbances. Examples of these waves manifestations in electric currents and in electromagnetic radiation are given.

scholarly journals Electromagnetic Waves Dispersion and Interaction of an Annular Beam-Ion Channel System in Plasma Waveguide

2017 ◽  
Vol 2017 ◽  
pp. 1-10
Author(s):  
Jixiong Xiao ◽  
Zhijiang Wang ◽  
Jun Chen ◽  
Changhai Liu
Keyword(s):  
Ion Channel ◽  
Electromagnetic Waves ◽  
Low Frequency ◽  
Transverse Magnetic ◽  
Betatron Oscillation ◽  
Plasma Waveguide ◽  
Electromagnetic Properties ◽  
Channel System ◽  
Annular Beam ◽  
Frequency Branch

A linear theory for the electromagnetic properties and interactions of an annular beam-ion channel system in plasma waveguide is presented. The dispersion relations for two families of propagating modes, including the electrostatic and transverse magnetic modes, are derived. The dependencies of the dispersion behavior and interaction for different wave modes on the thickness of the annular beam and betatron oscillation frequency are studied in detail by numerical calculations. The results show that the inner and outer radii of the beam have different influences on propagation properties of the electrostatic and electromagnetic modes with different betatron oscillation parameters. In the weak ion channel situation, the two types of electrostatic waves, that is, space charge and betatron modes, have no interaction with the transverse magnetic modes. However, in the strong ion channel situation, the transverse magnetic modes will have two branches and a low frequency mode emerged as the new branch. In this case, compared with the solid beam case, the betatron modes not only can interact with the high frequency branch at small wavenumber but also can interact with the low frequency branch at large wavenumber.

scholarly journals Permittivity and Permeability Characterization of SiC and Ferro Metals for Structural Health Monitoring Utilization

2018 ◽  
Vol 225 ◽  
pp. 05007
Author(s):  
Alaa Raad Hussein ◽  
Thar M. Badri Albarody ◽  
Puteri Sri Melor Bt M. Yousf ◽  
Monis Abdulmanan Abdullah ◽  
Husam Kareem Mohsin Al-Jothery
Keyword(s):  
Electromagnetic Waves ◽  
Nano Particles ◽  
Electromagnetic Properties ◽  
Filler Materials ◽  
Operation Conditions ◽  
Sensing Technology ◽  
X Band ◽  
Permittivity And Permeability ◽  
Source Of Information

The need for wireless sensing technology has rapidly increased recently, specifically the usage of electromagnetic waves which becoming more required as a source of information. Silicon carbide (SiC) Nano particles has been used in this study, the material under test (MUT) was exposed directly to a microwave field to examine the electromagnetic behavior. The permittivity and permeability were investigated with different filler materials to approach best and optimal electromagnetic absorbing characteristics to assist engineers to monitor structure-based composite for defects evaluation that may occur during operation conditions or through manufacturing process. XRD, FESEM and both complex permittivity and permeability were measured for the pure materials that candidate for this study. The results showed that all the selected nanostructure material exhibit a good purity with proper electromagnetic properties in the X- band, this can lead to absorbing and transmission properties that can be used in monitoring structures or manufactured part during fabrication process.

scholarly journals Preparation and electromagnetic properties characterization of reduced graphene oxide/strontium hexaferrite nanocomposites

2020 ◽  
Vol 9 (1) ◽  
pp. 105-114 ◽  
Author(s):  
Shumin Du ◽  
Huaiyin Chen ◽  
Ruoyu Hong
Keyword(s):  
Electromagnetic Wave ◽  
Environmental Pollution ◽  
Electromagnetic Interference ◽  
Electromagnetic Waves ◽  
Rapid Development ◽  
Living Environment ◽  
World Health ◽  
Electromagnetic Properties ◽  
Strontium Hexaferrite ◽  
Wave Radiation

AbstractWith the rapid development of electronics and information technology, electronics and electrical equipment have been widely used in our daily lives. The living environment is full of electromagnetic waves of various frequencies and energy. Electromagnetic wave radiation has evolved into a new type of environmental pollution that has been listed by the WHO (World Health Organization) as the fourth largest source of environmental pollution after water, atmosphere, and noise. Studies have shown that when electromagnetic wave radiation is too much, it can cause neurological disorders. And electromagnetic interference will cause the abnormal operation of medical equipment, precision instruments and other equipment, and therefore cause incalculable consequences. Therefore, electromagnetic protection has become a hot issue of concern to the social and scientific circles.

Using low-frequency noise characterization of AlGaN/GaN HEMT as a tool for technology assessment and failure prediction

2004 ◽  
Author(s):  
Jean-Guy Tartarin ◽  
Geoffroy Soubercaze-Pun ◽  
Abdelali Rennane ◽  
Laurent Bary ◽  
Robert Plana ◽  
...  
Keyword(s):  
Technology Assessment ◽  
Low Frequency ◽  
Failure Prediction ◽  
Frequency Noise ◽  
Low Frequency Noise ◽  
Gan Hemt ◽  
Noise Characterization
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