Results 101 to 110 of about 2,207,218 (336)
Arquivos Brasileiros de Cardiologia, 2012 FUNDAMENTO: A ressonância magnética cardíaca é considerada o método padrão-ouro para o cálculo de volumes cardíacos. A bioimpedância transtorácica cardíaca avalia o débito cardíaco.
Humberto Villacorta Junior +5 more
doaj +1 more source
Q factors for antennas in dispersive media [PDF]
, 2014 Stored energy and Q-factors are used to quantify the performance of small antennas. Accurate and efficient evaluation of the stored energy is also essential for current optimization and the associated physical bounds. Here, it is shown that the frequency
Cismasu, Marius +2 more
core
, 2008 We perform broadband phase sensitive measurements of the reflection coefficient from 45 MHz up to 20 GHz employing a vector network analyzer with a 2.4 mm coaxial sensor which is terminated by the sample under test.
Elvira Ritz +5 more
core +1 more source
ELECTRIC IMPEDANCE OF SUSPENSIONS OF ARBACIA EGGS
The Journal of General Physiology, 1928 Apparatus has been designed and constructed for the measurement of the electric impedance of suspensions of Arbacia eggs in sea water to alternating currents of frequencies from one thousand to fifteen million cycles per second. This apparatus is simple,
K. Cole
semanticscholar +1 more source
Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres
Advanced Engineering Materials, EarlyView.This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann +3 more
wiley +1 more source
The Behaviour of Mistuned Piezoelectric Shunt Systems and Its Estimation
Shock and Vibration, 2016 This paper addresses monoharmonic vibration attenuation using piezoelectric transducers shunted with electric impedances consisting of a resistance and an inductance in series.
M. Berardengo, S. Manzoni, M. Vanali
doaj +1 more source
Advanced Engineering Materials, EarlyView.Trace additions of Sn and Sr combined with a two‐step aging treatment are shown to enhance the microstructure and performance of Al–Zr–Sc conductor alloys. Strength and electrical conductivity increase concurrently through accelerated precipitation of fine Al3(Sc, Zr) precipitates and improved dislocation resistance, offering a cost‐effective pathway ...
Quan Shao +3 more
wiley +1 more source
An Empirical-Mathematical Approach for Calibration and Fitting Cell-Electrode Electrical Models in Bioimpedance Tests [PDF]
, 2018 This paper proposes a new yet efficient method allowing a significant improvement in the on-line analysis of biological cell growing and evolution.
Daza Navarro, María Paula +9 more
core
Differentiating Phenotypes of Coronavirus Disease-2019 Pneumonia by Electric Impedance Tomography. [PDF]
Front Med (Lausanne), 2022 Lovas A +7 more
europepmc +1 more source
Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories
Advanced Engineering Materials, EarlyView.Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter +5 more
wiley +1 more source