Computational analysis of gas breakdown modes in direct current micro-plasmas at elevated pressures

2020 ◽  
Vol 128 (23) ◽  
pp. 233301
Author(s):  
Dmitry Levko ◽  
Laxminarayan L. Raja
Keyword(s):  
Direct Current ◽  
Computational Analysis ◽  
Elevated Pressures ◽  
Gas Breakdown

Computational analysis of direct current breakdown process in SF6 at low pressure

2021 ◽  
Author(s):  
jiamao gao ◽  
Hao Wu ◽  
Shimin Yu ◽  
Zhipeng Chen ◽  
Zhijiang Wang ◽  
...  
Keyword(s):  
Direct Current ◽  
Computational Analysis ◽  
Low Pressure ◽  
Breakdown Process

scholarly journals A Spotter's Guide to Dispersion in Surface-Confined Voltammetry Experiments

2020 ◽  
Author(s):  
Henry Lloyd-Laney ◽  
Martin Robinson ◽  
Alan Bond ◽  
Alison Parkin ◽  
David Gavaghan
Keyword(s):  
Numerical Simulations ◽  
Direct Current ◽  
Redox Reaction ◽  
Driving Force ◽  
Reaction Rate ◽  
Computational Analysis ◽  
Thermodynamic Driving Force

<div>This paper describes the effect of thermodynamic and kinetic dispersion on numerical simulations of three different surface-confined voltammetry experiments, ramped FTACV, Purely sinusoidal voltammetry (PSV) and direct current voltammetry (DCV), and the differences between the dispersed and non-dispersed cases. <br></div><div>Dispersion in this case refers to a range of observed values for the thermodynamic driving force and reaction rate of a redox reaction (thermodynamic and kinetic dispersion respectively) . This has been acknowledged as a complicating factor of voltammetry experiments for some time. <br></div><div>We demonstrate that thermodynamic dispersion has a far stronger effect than kinetic dispersion, and detail the ways in which kinetic dispersion can be resolved under such conditions. The work is novel in its comparison of three separate voltammetry techniques, and a focus on how to determine the presence of dispersion through computational analysis of experimental voltammetry data alone; previous work has required specific experiments designed to distinguish between dispersed and non-dispersed cases.</div>

scholarly journals A Spotter's Guide to Dispersion in Surface-Confined Voltammetry Experiments

2020 ◽  
Author(s):  
Henry Lloyd-Laney ◽  
Martin Robinson ◽  
Alan Bond ◽  
Alison Parkin ◽  
David Gavaghan
Keyword(s):  
Numerical Simulations ◽  
Direct Current ◽  
Redox Reaction ◽  
Driving Force ◽  
Reaction Rate ◽  
Computational Analysis ◽  
Thermodynamic Driving Force

<div>This paper describes the effect of thermodynamic and kinetic dispersion on numerical simulations of three different surface-confined voltammetry experiments, ramped FTACV, Purely sinusoidal voltammetry (PSV) and direct current voltammetry (DCV), and the differences between the dispersed and non-dispersed cases. <br></div><div>Dispersion in this case refers to a range of observed values for the thermodynamic driving force and reaction rate of a redox reaction (thermodynamic and kinetic dispersion respectively) . This has been acknowledged as a complicating factor of voltammetry experiments for some time. <br></div><div>We demonstrate that thermodynamic dispersion has a far stronger effect than kinetic dispersion, and detail the ways in which kinetic dispersion can be resolved under such conditions. The work is novel in its comparison of three separate voltammetry techniques, and a focus on how to determine the presence of dispersion through computational analysis of experimental voltammetry data alone; previous work has required specific experiments designed to distinguish between dispersed and non-dispersed cases.</div>

scholarly journals Scaling law for direct current field emission-driven microscale gas breakdown

2012 ◽  
Vol 19 (12) ◽  
pp. 123515 ◽  
Author(s):  
A. Venkattraman ◽  
A. A. Alexeenko
Keyword(s):  
Field Emission ◽  
Direct Current ◽  
Scaling Law ◽  
Current Field ◽  
Gas Breakdown

Inter-Method Reliability of Pulse Volume Related Measures Derived Using Finger-Photoplethysmography

2018 ◽  
Vol 32 (4) ◽  
pp. 182-190 ◽  
Author(s):  
Kenta Matsumura ◽  
Koichi Shimizu ◽  
Peter Rolfe ◽  
Masanori Kakimoto ◽  
Takehiro Yamakoshi
Keyword(s):  
Light Intensity ◽  
Adverse Effects ◽  
Light Source ◽  
Direct Current ◽  
Resting State ◽  
Current Component ◽  
Psychophysiological Measures ◽  
Pulse Volume ◽  
Optical Paths ◽  
Sensor Positions

Abstract. Pulse volume (PV) and its related measures, such as modified normalized pulse volume (mNPV), direct-current component (DC), and pulse rate (PR), derived from the finger-photoplethysmogram (FPPG), are useful psychophysiological measures. Although considerable uncertainties exist in finger-photoplethysmography, little is known about the extent of the adverse effects on the measures. In this study, we therefore examined the inter-method reliability of each index across sensor positions and light intensities, which are major disturbance factors of FPPG. From the tips of the index fingers of 12 participants in a resting state, three simultaneous FPPGs having overlapping optical paths were recorded, with their light intensity being changed in three steps. The analysis revealed that the minimum values of three coefficients of Cronbach’s α for ln PV, ln mNPV, ln DC, and PR across positions were .948, .850, .922, and 1.000, respectively, and that those across intensities were .774, .985, .485, and .998, respectively. These findings suggest that ln mNPV and PR can be used for psychophysiological studies irrespective of minor differences in sensor attachment positions and light source intensity, whereas and ln DC can also be used for such studies but under the condition of light intensity being fixed.

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