20 papers · ranked by Valyu relevance
Zhe Liu, Liwei Jiang, Yisong Zheng
The diagonal and Hall conductivities of graphene arising from the spin-orbit coupling impurity scattering are theoretically studied. Based on the continuous model, i.e. the massless Dirac equation, we derive analytical expressions of the conductivity tensor from both the Kubo and Boltzmann transport theories. By…
Nicholas Labarbera, Corina Drapaca
Background One recent area of cancer research is irreversible electroporation (IRE). Irreversible electroporation is a minimally invasive procedure where needle electrodes are inserted into the body to ablate tumor cells with electricity. The aim of this paper is to propose a mathematical model that incorporates a…
Nitish Katoch, Bup-Kyung Choi, Ji-Ae Park, In-Ok Ko + 2 more
Imaging of the electrical conductivity distribution inside the human body has been investigated for numerous clinical applications. The conductivity tensors of biological tissue have been obtained from water diffusion tensors by applying several models, which may not cover the entire phenomenon. Recently, a new…
Bup Kyung Choi, Nitish Katoch, Hyung Joong Kim, Ji Ae Park + 3 more
'In Ok Ko' 'Oh In Kwon' 'Eung Je Woo'] Background Electrical conductivity of a biological tissue at low frequencies can be approximately expressed as a tensor. Noting that cross-sectional imaging of a low-frequency conductivity tensor distribution inside the human body has wide clinical applications of many…
Neha Rana, Nitish Katoch
Imaging electrical conductivity may reveal relationships between biological tissues, cellular structures, and physiological processes. Biological tissues are primarily composed of major ions such as Na+ and K+, with varying concentrations and mobility within the cellular structures. These tissues consist of…
Graeme W. Milton
A conducting two-dimensional periodic composite of two anisotropic phases with anisotropic, not necessarily symmetric, conductivity tensors σ1 and σ2 is considered. By finding approximate representations for the relevant operators, an approximation formula is derived for the effective matrix-valued conductivity σ ∗ as…
Joonsung Lee, Yizhuang Song, Narae Choi, Sungmin Cho + 2 more
'Dong-Hyun Kim'] Anisotropic electrical properties can be found in biological tissues such as muscles and nerves. Conductivity tensor is a simplified model to express the effective electrical anisotropic information and depends on the imaging resolution. The determination of the conductivity tensor should be based on…
Dihui Wang, Heng Ban, Puqing Jiang
anisotropic thermal conductivity tensor Authors: ['Dihui Wang' 'Heng Ban' 'Puqing Jiang'] The increasing complexity of advanced materials with anisotropic thermal properties necessitates more generic and efficient methods to determine three-dimensional (3D) anisotropic thermal conductivity tensors with up to six…
Santiago Osorio Jurado, Mikael Skorpil, Per Svenningsson, Rodrigo Moreno + 1 more
Transcranial direct current stimulation (tDCS) dose depends on how brain conductivity is modeled. White matter anisotropy is conventionally estimated from single-shell diffusion tensor imaging (DTI). Multidimensional diffusion MRI (MD-dMRI), specifically q-space trajectory imaging (QTI), instead gives a mean tensor…
Gregory M Noetscher, Alton Miles, Bethanny Danskin, Dexuan Tang + 12 more
Electrical conductivity of cortical gray matter governs the magnitude and spatial distribution of electric fields generated by brain stimulation and intrinsic neuronal activity measured with M/EEG and intracortical recordings. However, reported macroscopic conductivity values vary by more than threefold, limiting the…
Authors not listed
Thermoelectric (TE) power is a leading technology for addressing energy waste, and the quaternary sulphide Cu2ZnSnS4 (CZTS) is of considerable interest for lightweight and flexible thin-film devices. However, the large variation in the figure of merit, ZT , obtained in experimental studies highlights the need for a…
Roderic S. Lakes
Effects of a third rank permeability term in chiral solids are studied. Fluid flow through such materials acquires vorticity upon emergence from the material. Materials of interest include chiral surface lattices such as the gyroid, chiral rib lattices, and granular materials comprised of sugar crystals, quartz sand…
Daniel E. Hurtado, Javiera Jilberto, Grigory Panasenko
Gap junctions are key mediators of the intercellular communication in cardiac tissue, and their function is vital to sustain normal cardiac electrical activity. Conduction through gap junctions strongly depends on the hemichannel arrangement and transjunctional voltage, rendering the intercellular conductance highly…
S. Wagner, F. Lucka, J. Vorwerk, C.S. Herrmann + 3 more
To explore the relationship between transcranial current stimulation (tCS) and the electroencephalography (EEG) forward problem, we investigate and compare accuracy and efficiency of a reciprocal and a direct EEG forward approach for dipolar primary current sources both based on the finite element method (FEM), namely…
William J. Parnell
One of the most cited papers in Applied Mechanics is the work of Eshelby from 1957 who showed that a homogeneous isotropic ellipsoidal inhomogeneity embedded in a homogeneous isotropic host would feel uniform strains and stresses when uniform strains or stresses are applied in the far-field. Of specific importance is…
A. Tzanis
The present work examines basic and interrelated properties of the Magnetotelluric impedance tensor. The first part of the analysis focuses on the local spatial characteristics of impedance tensors obtained at the surface of general Earth conductivity structures. It is demonstrated that the tensor admits an…
Authors not listed
We present a detailed first-principles study of the electrical and thermal transport, and the thermoelectric figure of merit zT , of the oxide perovskite SrTiO3 in the orthorhombic Pnma, tetragonal I4/mcm and cubic Pm-3m phases. Analysis of the lattice thermal conductivity shows that the “particle-like” contribution…
Wenjun Zhang, Zhikun Yao, Lee Burton
In this paper we investigate the relationship between the conductivity effective mass and exfoliation energy of materials to assess whether automatic sampling of the electron band structure can predict the presence of and ease of separating chemically bonded layers. We assess 22,976 materials from the Materials Project…
Louis Martin‐Monier, Pierre-Luc Piveteau, Fabien Sorin
Soft electronics have recently gathered considerable interest thanks to their bio-mechanical compatibility. An important feature of such deformable conductors is their electrical response to strain. While development of stretchable materials with high gauge factors has attracted considerable attention, there is a…
Authors not listed
Conductive hydrogels are hydrated materials with mixed ionic‐electronic conduction that readily bridge living tissue with electronic devices. As bioelectronic interfaces are underpinned by ionic and electronic conductivity, it is important to carefully characterize both contributions. The soft, hydrated, 3D nature of…