The Soap Film: An Analogue Computer

2012 ◽  
Vol 100 (3) ◽  
pp. 243 ◽  
Author(s):  
Cyril Isenberg
Keyword(s):  
Soap Film ◽  
Analogue Computer

Lecture demonstration of ponderomotive forces in electrostatics with the aid of a soap film

1963 ◽  
Vol 79 (4) ◽  
pp. 741-742
Author(s):  
L.N. Kaptsov
Keyword(s):  
Soap Film ◽  
Lecture Demonstration ◽  
Ponderomotive Forces

Soap film flow and thickness for soap bubble rendering

2019 ◽  
Author(s):  
Sanghyeon Gil ◽  
Yunji Seok ◽  
Kiyeol Park ◽  
Jaeseok Yoo ◽  
Seongah Chin
Keyword(s):  
Film Flow ◽  
Soap Film ◽  
Soap Bubble

Measuring Tensile Strength of a Detergent‐Stabilized Soap Film

2021 ◽  
Author(s):  
Chi M. Phan ◽  
Cuong V. Nguyen ◽  
Hoang M. Nguyen
Keyword(s):  
Tensile Strength ◽  
Soap Film

Soap-film dynamics and topological transitions under continuous deformation

2016 ◽  
Vol 1 (6) ◽  
Author(s):  
H. K. Moffatt ◽  
Raymond E. Goldstein ◽  
Adriana I. Pesci
Keyword(s):  
Soap Film ◽  
Continuous Deformation ◽  
Topological Transitions

scholarly journals Multiscale Sample Entropy of Two-Dimensional Decaying Turbulence

Entropy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 245
Author(s):  
Ildoo Kim
Keyword(s):  
Time Series ◽  
Time Series Data ◽  
Soap Film ◽  
Sample Entropy ◽  
Series Data ◽  
Entropy Analysis ◽  
Measured Time ◽  
Energetic Analysis ◽  
Turbulence Data ◽  
Decaying Turbulence

Multiscale sample entropy analysis has been developed to quantify the complexity and the predictability of a time series, originally developed for physiological time series. In this study, the analysis was applied to the turbulence data. We measured time series data for the velocity fluctuation, in either the longitudinal or transverse direction, of turbulent soap film flows at various locations. The research was to assess the feasibility of using the entropy analysis to qualitatively characterize turbulence, without using any conventional energetic analysis of turbulence. The study showed that the application of the entropy analysis to the turbulence data is promising. From the analysis, we successfully captured two important features of the turbulent soap films. It is indicated that the turbulence is anisotropic from the directional disparity. In addition, we observed that the most unpredictable time scale increases with the downstream distance, which is an indication of the decaying turbulence.

Catastrophe theory and the analogue computer

1976 ◽  
Vol 18 (3) ◽  
pp. 187-188
Author(s):  
William J.G. Overington
Keyword(s):  
Catastrophe Theory ◽  
Analogue Computer

Electric analogue computer for complex vectors

1954 ◽  
Vol 31 (3) ◽  
pp. 112-112
Author(s):  
Technology Instrument Corporation
Keyword(s):  
Analogue Computer

The Reduction of Bias Error in Transfer Function Estimates Using FFT-Based Analyzers

1984 ◽  
Vol 106 (1) ◽  
pp. 29-35 ◽  
Author(s):  
P. Cawley
Keyword(s):  
Transfer Function ◽  
Random Excitation ◽  
Analogue Computer ◽  
Bias Error ◽  
Testing Time ◽  
Theoretical Predictions ◽  
Set Up ◽  
Modal Mass ◽  
Time Required ◽  
Good Agreement

The susceptibility to bias error of two methods for computing transfer (frequency response) functions from spectra produced by FFT-based analyzers using random excitation has been investigated. Results from tests with an FFT analyzer on a single degree-of-freedom system set up on an analogue computer show good agreement with the theoretical predictions. It has been shown that, around resonance, the bias error in the transfer function estimate H2 (Syy/Sxy*) is considerably less than that in the more commonly used estimate, H1 (Sxy/Sxx). The record length, and hence the testing time, required for a given accuracy is reduced by over 50 percent if the H2 calculation procedure is used. The analysis has also shown that if shaker excitation is used on lightly damped structures with low modal mass, it is important to minimize the mass of the force gage and the moving element of the shaker.

Probing soap-film friction with two-phase foam flow

2008 ◽  
Vol 88 (9-10) ◽  
pp. 679-691 ◽  
Author(s):  
Ariel I. Balter ◽  
James A. Glazier ◽  
Rebecca Perry
Keyword(s):  
Soap Film ◽  
Two Phase ◽  
Foam Flow
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