Results 21 to 30 of about 6,092,989 (295)

Measurements of electrical impedance in cementitious mortars: Influence of electrodes and physical dimensions of specimens

open access: yesCase Studies in Construction Materials, 2023
Due to the growing expansion of cities and industries, housing and infrastructure works are essential to meet the demands of development in all countries.
Euclydes Ferrer de Almeida Junior   +1 more
doaj   +1 more source

Impedance analysis of oil conductivity and pixel non-uniformity in electrowetting displays

open access: yesResults in Physics, 2020
The electrical conductivity of the oil film is a key property of electrowetting displays (EWD) and its evolution probably correlates to the device lifetime. In this report, we fabricate an EWD device and measure its electrical impedance spectrum.
Bojian Xu   +6 more
doaj   +1 more source

Electrical Impedance of Cardiac Muscle [PDF]

open access: yesCirculation Research, 1961
Impedances of cat cardiac muscle and frog sartorius muscle were compared at several frequencies before and after interspace ion depletion. Strips of parallel fibers were obtained from papillary muscles and ventricular trabeculae. The impedances were measured in the direction of fiber orientation.
N, SPERELAKIS, T, HOSHIKO
openaire   +2 more sources

ELECTRIC IMPEDANCE OF ASTERIAS EGGS [PDF]

open access: yesJournal of General Physiology, 1936
The alternating current resistance and capacity of suspensions of unfertilized eggs of Asterias forbesi have been measured at frequencies from one thousand to sixteen million cycles per second. The plasma membrane of the egg has a static capacity of 1.10µf/cm.2 which is practically independent of frequency.
K S, Cole, R H, Cole
openaire   +2 more sources

Effects of lead exposure on blood electrical impedance spectroscopy of mice

open access: yesBioMedical Engineering OnLine, 2021
Background Lead is a nonessential heavy metal, which can inhibit heme synthesis and has significant cytotoxic effects. Nevertheless, its effect on the electrical properties of red blood cells (RBCs) remains unclear.
Binying Yang   +4 more
doaj   +1 more source

Instantaneous measurement of electrical parameters in a palm during electrodermal activity [PDF]

open access: yes, 1996
The determination of impedance can be performed by means of a frequency-domain analysis or a time-domain analysis. The latter has the advantage of being able to measure instantaneously all the frequency characteristics of impedance.
Isshiki, Hiromi   +2 more
core   +1 more source

The Impact of Personal Thoracic Impedance on Electrical Cardioversion in Patients with Atrial Arrhythmias

open access: yesMedicina, 2021
Background and Objectives: Direct current cardioversion (DCCV) is a safe and useful treatment for atrial tachyarrhythmias. In the past, the energy delivered in DCCV was decided upon empirically, based only on the type of tachyarrhythmia.
Seung-Young Roh   +8 more
doaj   +1 more source

Electrical impedance spectroscopy (EIS) for biological analysis and food characterization: a review [PDF]

open access: yesJournal of Sensors and Sensor Systems, 2017
Electrical impedance spectroscopy (EIS), in which a sinusoidal test voltage or current is applied to the sample under test to measure its impedance over a suitable frequency range, is a powerful technique to investigate the electrical properties of a ...
M. Grossi, B. Riccò
doaj   +1 more source

Automatic compensation system for impedance measurement [PDF]

open access: yes, 2002
This paper deals with the realization of the four-pair terminal definition of impedance standards. A simple, though reliable, system is described that allows an automatic compensation of the voltage at the low potential port of impedance standards to be ...
VALLAN A   +12 more
core   +1 more source

Electrical Impedance Tomography

open access: yesBritish Journal of Radiology, 1997
Electrical impedance tomography (EIT) is a technique which allows cross-sectional images related to the local electrical impedance within an object to be reconstructed from sets of measurements made on its surface. The main drive behind the development of EIT has been its possible application in medical imaging, as biological tissues are known to ...
openaire   +2 more sources

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