Results 261 to 270 of about 67,750 (314)

Optimization Techniques on Permittivity Distribution in Permittivity Graded Solid Insulators

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation, 2006
We have proposed a new concept for solid insulation; an application of FGM (functionally graded materials). By controlling the distribution of dielectric permittivity inside solid insulators, we can achieve the efficient field control with keeping simple configuration of solid insulators.
H. Okubo, H. Shumiya, M. Ito, K. Kato
openaire   +1 more source

The permittivity of thermodynamically ideal liquid mixtures and the excess relative permittivity of binary dielectrics

Physical Chemistry Chemical Physics, 2009
The ideal relative permittivity of liquid mixtures is demonstrated to be a volume-fraction-weighted average of the pure-component relative permittivities. This generalised-thermodynamics result is used to define the molar electric dipole, permittivity, dielectric polarization and electric susceptibility of thermodynamically ideal liquid mixtures and ...
João Carlos R, Reis, T P, Iglesias, Gérard, Douhéret, Michael I, Davis   +3 more
openaire   +2 more sources

Effective Permittivity and Scattering of Bicontinuous Random Medium with Strong Permittivity Fluctuation Theory

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
We apply the analytical fully coherent model to bicontinuous media for applications in microwave remote sensing of snow cover. In our model, snow is represented by bicontinuous media which is generated by a Gaussian random process. The statistical moments and correlation functions of bicontinuous media can be calculated. With the correlation functions,
Jiyue Zhu, Shurun Tan, Leung Tsang
openaire   +1 more source

New Permittivity Measurement Methods Using Resonant Phenomena For High-Permittivity Materials

IEEE Transactions on Instrumentation and Measurement, 2017
This paper describes the characterization of high-permittivity materials with a dielectric constant ( $\epsilon _{r}$ ) up to 3000 using resonant phenomena. We propose and demonstrate two types of measurement techniques: the rectangular resonator method by controlling the sample insertion length and the waveguide reflection method with a sample ...
Yuto Kato, Masahiro Horibe
openaire   +1 more source

Dipolar Correlations and the Dielectric Permittivity of Water

Physical Review Letters, 2007
The static dielectric properties of liquid and solid water are investigated within linear response theory in the context of ab initio molecular dynamics. Using maximally localized Wannier functions to treat the macroscopic polarization we formulate a first-principles, parameter-free, generalization of Kirkwood's phenomenological theory.
M. SHARMA, RESTA, Raffaele, R. CAR
openaire   +5 more sources

Biomass measurement by inductive permittivity

Biotechnology and Bioengineering, 1997
An electrodeless, inductive permittivity probe is shown to reliably indicate fermentation biomass. By designing the probe based on electromagnetic induction, the electrode polarization artifact-common to electrode-based permittivity measurements of conductive solutions-is eliminated. The measurement of viable biomass concentration (X(V)) is precise and
openaire   +2 more sources

Electrical Conductivity and Permittivity of Murine Myocardium

IEEE Transactions on Biomedical Engineering, 2009
A classic problem in traditional conductance measurement of left ventricular (LV) volume is the separation of the contributions of myocardium from blood. Measurement of both the magnitude and the phase of admittance allow estimation of the time-varying myocardial contribution, which provides a substantial improvement by eliminating the need for ...
Karthik Raghavan, John E. Porterfield, Anil T. G. Kottam, Marc D. Feldman, Daniel Escobedo, Jonathan W. Valvano, John A. Pearce   +6 more
openaire   +2 more sources

Microwave permittivity of dry sand

IEEE Transactions on Geoscience and Remote Sensing, 1998
The relative dielectric constant, or relative permittivity, /spl epsiv/ of dry snow, is independent of frequency from about 1 MHz up to the microwave range of at least 10 GHz. New measurements of with improved accuracy were made with a specially designed resonator operating near 1 GHz.
openaire   +1 more source

ENHANCING THE DIELECTRIC PERMITTIVITY OF ELASTOMERS

2008
The electromechanical transduction properties of any dielectric elastomer are intrinsically regulated by the dielectric permittivity of the material. This parameter proportionally controls both the achievable active stresses and strains. Accordingly, a suitable increase of the material permittivity may provide a valuable means to improve the ...
GALLONE, GIUSEPPE CARMINE, CARPI, FEDERICO, GALANTINI, FABIA, DE ROSSI, DANILO EMILIO   +3 more
openaire   +2 more sources

permittivity

2011
  +4 more sources