Parallel conductance (electric current flow through surrounding tissue) is an important determinant of accurate measurements of arterial lumen diameter, using the conductance method. The present study is focused on the role of non-uniform geometrical/electrical configurations of surrounding tissue, which are a primary source of electric current leakage. Computational models were constructed to ...

the variations of the electrical conductivity with temperature and electric field of the ternary alloy of gallium, aluminium and arsenic (al0.75ga0.25as) with atomic compositions of 99/1 and 98/2 have been investigated. the electrical conductivity of the alloy increases with temperature according to the relation, ? = ?0 exp (??/kt). the activation energy calculated from this empirical relation ...

A selective review is presented of the use of optical, electrical, and electromechanical measurement methodologies of the electric field, charge, conductivity, and permittivity in dielectrics. Kerr electro-optic measurements are presented to demonstrate how volume charge distributions can distort the electric field distribution :significantly and how the field and charge distributions depend on...

Electric conductivity of air is an important characteristic of the electric properties of an atmosphere. Testing instruments to measure electric conductivity ranging from ~10 to 10Sm in natural conditions found in the Earth atmosphere is not an easy task. One possibility is to use stratospheric balloon flights; another (and a simpler one) is to look for terrestrial environments with significant...

Hybrid imaging techniques utilize couplings of physical modalities – they are called hybrid, because, typically, the excitation and measurement quantities belong to different modalities. Recently there has been an enormous research interest in this area because these methods promise very high resolution. In this paper we give a review on hybrid tomography methods for electrical conductivity ima...

Bioelectrochemistry and Bioenergetics 43 (1997) 285-291 Sensitivity of transmembrane voltage induced by applied electric fields-a theoretical analysis Tadej Kotnik, Feda Bobanovic *, Damijan Miklavcic University of Ljubljana, Faculty of Electrical Engineering, Trzaskn 25, 1000 Ljubljana, Slovenia Received 4 December 1996; revised 20 January 1997 The sensitivity of induced transmembrane voltage ...

Electropermeabilization (EP) based protocols such as those applied in medicine, food processing or environmental management, are well established and widely used. The applied voltage, as well as tissue electric conductivity, are of utmost importance for assessing final electropermeabilized area and thus EP effectiveness. Experimental results from literature report that, under certain EP protoco...

Electrical currents in resistive materials must be driven by an internal electric field E = J/ς , where J is the current density and ς is the electrical conductivity. The internal electric field must be shaped by an appropriate density σ of surface electrical charge. In practice, the surface charge density is quite small, and is often neglected in discussions of electrical currents. Some except...

Time-dependent density functional theory is extended to include dissipative systems evolving under a master equation, providing a Hamiltonian treatment for molecular electronics. For weak electric fields, the isothermal conductivity is shown to match the adiabatic conductivity, thereby recovering the Landauer result.

Introduction: Electric Properties Tomography (EPT) provides a theoretical framework for the determination of electric conductivity and local SAR using a standard MR system [1]. These two parameters could be of high interest in clinical MR and MR hardware engineering. Firstly, local SAR is of major interest in high field MR. Secondly, conductivity could be used as a parameter for diagnosis. For ...