Frequency Dependence of Multilayer Soil Electrical Parameters: Effects on Ground Potential Rise

2021 ◽  
Author(s):  
Mohammad Ghomi ◽  
Claus Leth Bak ◽  
Filipe Faria da Silva
Keyword(s):  
Frequency Dependence ◽  
Electrical Parameters ◽  
Ground Potential

Spatial Variation of the Electrical Properties of Chara australis. II. Membrane Capacitance and Conductance as a Function of Frequency

1983 ◽  
Vol 10 (3) ◽  
pp. 353 ◽  
Author(s):  
TC Chilcott ◽  
HGL Coster ◽  
K Ogata ◽  
JR Smith
Keyword(s):  
Frequency Dependence ◽  
Water Film ◽  
Membrane Conductance ◽  
Membrane Capacitance ◽  
Electrical Parameters ◽  
Low Frequencies ◽  
Oscillatory Pattern ◽  
Chara Australis ◽  
Specific Membrane ◽  
Acid And Alkaline Zones

The water-film technique has been used to measure the frequency dependence of the membrane capacitance and conductance as a function of position along illuminated cells of C. australis. At low frequencies (< 1 Hz) the behaviour of the membrane capacitance was found to be strongly dependent upon both frequency and position. A complicated oscillatory pattern was observed which is possibly linked to interference effects between the impressed alternating current and the current normally circulating between alternate acid and alkaline zones. The area-specific membrane conductance was always higher in the alkaline zones than in the acid zones and at low frequencies was 0.45 - 1.3 S m-2 and 2.9 - 3.6 S m-2 respectively. The temperature dependence of the variation of the capacitance and conductance with frequency was also different in the acid and alkaline zones. The observed spatial and frequency dependence of the membrane electrical parameters is clearly associated with the dynamic homeostatis of the cell, and has consequences for the construction of realistic electrical models for the membrane of C. australis.

Lightning-Induced Voltages Over Lossy Ground: The Effect of Frequency Dependence of Electrical Parameters of Soil

2014 ◽  
Vol 56 (5) ◽  
pp. 1129-1136 ◽  
Author(s):  
Fernando H. Silveira ◽  
Silverio Visacro ◽  
Rafael Alipio ◽  
Alberto De Conti
Keyword(s):  
Frequency Dependence ◽  
Electrical Parameters

scholarly journals Effects of Additional Amount of Carbon Micro-Coils on the Electrical Properties of Carbon Micro-Coils Composite Sheet as a Tactile Sensor

2012 ◽  
Vol 36 (2) ◽  
pp. 177-186 ◽  
Author(s):  
Meherun Nessa ◽  
S Motojima
Keyword(s):  
Electrical Properties ◽  
Frequency Dependence ◽  
Double Helix ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Tactile Sensing ◽  
Composite Sheet ◽  
Electrical Parameters ◽  
Additional Amount ◽  
Academy Of Sciences

The morphology and electrical properties, tactile sensing properties of carbon micro-coils  (CMC) composite sheet were examined. Frequency dependence of electrical parameters;  inductance (L), capacitance (C) and impedance (Z) were measured on single and double-helix  composite sheets. It was found that these parameters of carbon micro-coils/polysilicone composites  extensively changed with the additional amount of CMC with polysilicone resine. It was also  observed that the higher additional amount (0 - 10 wt%) of CMC is appropriate for high sensitivity  as a tactile sensor. DOI: http://dx.doi.org/10.3329/jbas.v36i2.12961 Journal of Bangladesh Academy of Sciences, Vol. 36, No. 2, 177-186, 2012

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