23 papers · ranked by Valyu relevance
Jan Potworowski, Wit Jakuczun, Szymon Łęski, Daniel K Wójcik
Local field potentials (LFP), the low-frequency part of extracellular electric potential, reflect dendritic processing of synaptic inputs to neuronal populations. They are an invaluable tool in the studies of neural activity both in vivo and in vitro. With recent fast development of multielectrode technology one can…
Vincent E. J. M. Jacob
The set of chemosensory receptors expressed by the olfactory receptor neurons lying in an insect's antennae and maxillary palps define the ability of this insect to perceive the volatile chemicals of its environment. The main two electrophysiological methods of antennal recordings for studying the range of chemicals…
Chaitanya Chintaluri, Marta Bejtka, Władysław Średniawa, Michał Czerwiński + 4 more
Interpretation of extracellular recordings can be challenging due to the long range of electric field. This challenge can be mitigated by estimating the current source density (CSD). Here we introduce kCSD-python, an open Python package implementing Kernel Current Source Density (kCSD) method and related tools to…
Joseph Tharayil, Esra Neufeld, Michael Reimann
Estimation of the current source density (CSD) is a commonly-used method to interpret local field potential (LFP) signals by estimating the location of the neural sinks and sources of current that give rise to the LFP. We show analytically that, when the inter-electrode spacing is small relative to the width of the…
Chaitanya Chintaluri, Marta Kowalska, Władysław Średniawa, Michał Czerwiński + 3 more
Kernel Current Source Density (kCSD), which we introduced in 2012, is a kernel-based method to estimate current source density (CSD) from extracellular potentials recorded with arbitrarily placed electrodes. Estimating reconstruction errors in CSD has been an outstanding challenge. To address it, here we revisit kCSD…
Hiroyoshi Miyakawa, Toru Aonishi
This article provides a theoretical basis for relating macroscopic electrical signals recorded from biological tissue, such as electroencephalogram (EEG) and local field potential (LFP), to the electrophysiological processes at the cellular level in a manner consistent with Maxwell's equations. Concepts of the apparent…
Colin G. Hales, Susan Pockett
E and B sources are simply expressed by Maxwell's equations. An aggregate primary source “charge density (scalar) field” ρ(r,t) (C/m3) impresses an electric field system on space well beyond its bounds (notionally to infinity) by line of sight and at the speed of light. If a subset of that same set of charges happens…
Wolfgang Haberkorn, Uwe Steinhoff, Martin Burghoff, Olaf Kosch + 2 more
'Andreas Morguet' 'Hans Koch'] Background In recent years the visualization of biomagnetic measurement data by so-called pseudo current density maps or Hosaka-Cohen (HC) transformations became popular. Methods The physical basis of these intuitive maps is clarified by means of analytically solvable problems. Results…
William Bro-Jørgensen, Gemma C. Solomon
While the use of molecular orbitals (MOs) and their isosurfaces to explain physical phenomena in chemical systems are a time-honored tool, we show that the nodes are an equally important componentfor understanding the current density through single-molecule junctions. We investigate three dif- ferent model systems…
Hasan H. Eroğlu, Oula Puonti, Cihan Göksu, Fróði Gregersen + 3 more
Magnetic resonance current density imaging (MRCDI) of the human brain aims to reconstruct the current density distribution caused by transcranial electric stimulation from MR-based measurements of the current-induced magnetic fields. The reconstruction problem is challenging due to a low signal-to-noise ratio and a…
Dennis Q Troung, Alexander Guillen, Mujda Nooristani, Maxime Maheu + 2 more
Galvanic vestibular stimulation (GVS) uses at least one electrode placed on the mastoid process with one or multiple placed over other head areas to stimulate the vestibular system. The exact electrode size used is not given much importance in the literature and has not been reported in several studies. In a previous…
William Bro-Jørgensen, Gemma C. Solomon
While the use of molecular orbitals (MOs) and their isosurfaces to explain physical phenomena in chemical systems are a time-honored tool, we show that the nodes are an equally important componentfor understanding the current density through single-molecule junctions. We investigate three dif- ferent model systems…
Natalia Ganushkina, M. W. Liemohn, S. Dubyagin, Ioannis A. Daglis + 14 more
'I. Dandouras' 'Darren L. De Zeeuw' 'Yusuke Ebihara' 'Raluca Ilie' 'R. M. Katus' 'M. V. Kubyshkina' 'S. E. Milan' 'S. Ohtani' 'Nikolai Østgaard' 'Jone Peter Reistad' 'P. Tenfjord' 'F. Toffoletto' 'S. Zaharia' 'O. A. Amariutei'] Abstract. Electric currents flowing through near-Earth space (R 12 RE) can support a highly…
Wentao He, Lu Wang, G. Zhuang
The local intrinsic parallel current density driven by electron drift wave (DW) turbulence including electromagnetic (EM) effects is analytically studied. The scalings of the ratios of intrinsic current density driven by residual turbulent flux and by turbulent source to the bootstrap current density with electron…
Jakub Dobosz, Mateusz Bocheński, Mariusz Semczuk
In ultracold-atom and ion experiments, flexible control of the direction and amplitude of a uniform magnetic field is necessary. It is achieved almost exclusively by controlling the current flowing through coils surrounding the experimental chamber. Here, we present the design and characterization of a modular, analog…
Lei Xie, Chuan Lu, Jianfei Yin, Bo Wei + 4 more
'Zhipeng Yang' 'Changrong Liao'] Current source is an indispensable component of magnetorheological (MR) systems. Though MR fluid has a phase change as fast as in 1 ms, the response of MR damper (MRD) to generate the damping force may be two orders of magnitude longer. Therefore, the rapid response of current source is…
Marzouk, Osama A.
The current study belongs to the field of applied mathematics in plasma physics and electric power, where mathematical analysis of the algebraic equations governing the electric field vector, and the electric-current density field vector within a Magnetohydrodynamic (MHD) linear two-dimensional divergent supersonic…
Arijit Bag
Extraction of electricity from the salinity gradient of sea water-river water interface has drawn the key interest of sustainable energy researchers. Different technologies are in the spot light − such as pressure retarded osmosis, reverse electrodialysis, ionic diode membrane, mixing entropy battery, microbial fuel…
Authors not listed
When a small electric bias is applied to a single-molecule junction, current will flow through the molecule via a tunneling mechanism. In molecules with a cyclic or helical structure there may be circular currents, giving rise to a uni-directional magnetic field. Here, we implement the Biot Savart law and calculate the…
Sara Pettinato, Andrea Orsini, Stefano Salvatori
Highly accurate and stable current references are especially required for resistive-sensor conditioning. The solutions typically adopted in using resistors and op-amps/transistors display performance mainly limited by resistors accuracy and active components non-linearities. In this work, excellent characteristics of…
Ghislain Vieilledent, Fabian Jörg Fischer, Jérôme Chave, Daniel Guibal + 2 more
Basic wood density is an important ecological trait for woody plants. It is used to characterize species performance and fitness in community ecology, and to compute tree and forest biomass in carbon cycle studies. While wood density has been historically measured at 12% moisture, it is convenient for ecological…
Pablo Ángel Prieto-Díaz, Ange A. Maurice, Marcos Vera
The variation of the physical properties of vanadium electrolytes during vanadium redox flow batteries (VRFB) operation is known to have a significant impact on the flow of the electrolytes both in the cells and in the tanks. This study presents extensive accurate measurements of the density and viscosity of vanadium…
Ahmet S. Asan, Sinan Gok, Mesut Sahin
Transcranial electrical stimulation (tES) is rapidly becoming an indispensable clinical tool with its different forms. Animal data are crucially needed for better understanding of the underlying mechanisms of tES. For reproducibility of results in animal experiments, the electric fields (E-Fields) inside the brain…