scholarly journals Radial propagation of yield-power-law grouts into water-saturated homogeneous fractures

2020 ◽  
Vol 130 ◽  
pp. 104308 ◽  
Author(s):  
Liangchao Zou ◽  
Ulf Håkansson ◽  
Vladimir Cvetkovic
Keyword(s):  
Power Law ◽  
Water Saturated ◽  
Radial Propagation

The steady-state compressibility of saturated fibre webs at low pressures

1997 ◽  
Vol 12 (4) ◽  
pp. 267-269 ◽  
Author(s):  
Hannes Vomhoff ◽  
Armin Schmidt
Keyword(s):  
Steady State ◽  
Power Law ◽  
Experimental Work ◽  
Mechanical Pressure ◽  
Mechanical Pulp ◽  
Chemical Pulp ◽  
Water Saturated ◽  
Low Pressures ◽  
The Relationship

Abstract The steady-state compressibility of water-saturated Experimental work webs was investigated under annlied mechanical nressures between 30 Pa and 42 kPa. The we'bs were made fro a mechanical pulp, and an unbleached and a bleached chemical pulp. For each of these pulps, the relationship between mechanical pressure and bulk could be described by a power-law relationship with an r2-value higher than 0.98.

Measurement of dielectric response of water‐saturated rocks

Geophysics ◽  
1990 ◽  
Vol 55 (12) ◽  
pp. 1530-1541 ◽  
Author(s):  
M. R. Taherian ◽  
W. E. Kenyon ◽  
K. A. Safinya
Keyword(s):  
Frequency Dependence ◽  
Power Law ◽  
Complex Permittivity ◽  
High Frequency ◽  
Rock Sample ◽  
Data Sets ◽  
Rock Samples ◽  
Experimental Errors ◽  
Water Saturated ◽  
Better Than

We tabulate an extensive set of measurements of the complex permittivity (i.e., dielectric constant and conductivity) of brine saturated rocks in the frequency range 10–1300 MHz. Rather than listing the permittivity at each frequency, we present the parameters of a Cole‐Cole function used to fit the data for each rock sample. We choose the Cole‐Cole function for the following reason. The data sets from 271 rock samples were fitted to the commonly used functions in the literature, i.e., Cole‐Cole, Cole‐Davidson, and power law functions. We found that within experimental errors the fits to both the Cole‐Cole function and the power law represent the frequency dependence of the data better than the Cole‐Davidson function. Further, the Cole‐Cole function fits the data better at the high‐frequency end of our data. This result implies that five parameters of the Cole‐Cole function describe the frequency dependence of the complex permittivity of rock samples in the range 10–1300 MHz within experimental errors.

Analysis of power law assumptions for short-period comets and Kuiper bodies

1999 ◽  
Vol 173 ◽  
pp. 289-293 ◽  
Author(s):  
J.R. Donnison ◽  
L.I. Pettit
Keyword(s):  
Power Law ◽  
Pareto Distribution ◽  
Limited Data ◽  
Short Period ◽  
Probability Plots ◽  
Exponential Probability

AbstractA Pareto distribution was used to model the magnitude data for short-period comets up to 1988. It was found using exponential probability plots that the brightness did not vary with period and that the cut-off point previously adopted can be supported statistically. Examination of the diameters of Trans-Neptunian bodies showed that a power law does not adequately fit the limited data available.

An Environmental Wet Cell For High Voltage Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 18-19
Author(s):  
N.J. Tighe ◽  
H.M. Flower ◽  
P.R. Swann
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Image Quality ◽  
Inelastic Scattering ◽  
High Voltage ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
Environmental Cell ◽  
Water Saturated ◽  
High Temperature Gas

A differentially pumped environmental cell has been developed for use in the AEI EM7 million volt microscope. In the initial version the column of gas traversed by the beam was 5.5mm. This permited inclusion of a tilting hot stage in the cell for investigating high temperature gas-specimen reactions. In order to examine specimens in the wet state it was found that a pressure of approximately 400 torr of water saturated helium was needed around the specimen to prevent dehydration. Inelastic scattering by the water resulted in a sharp loss of image quality. Therefore a modified cell with an ‘airgap’ of only 1.5mm has been constructed. The shorter electron path through the gas permits examination of specimens at the necessary pressure of moist helium; the specimen can still be tilted about the side entry rod axis by ±7°C to obtain stereopairs.

Hearing in Mice by GSR Audiometry: II. Magnitude of Unconditioned GSR as a Function of Intensity and Frequency Interactions

1968 ◽  
Vol 11 (1) ◽  
pp. 169-178 ◽  
Author(s):  
Alan Gill ◽  
Charles I. Berlin
Keyword(s):  
Power Law ◽  
Response Magnitude ◽  
Single Units ◽  
Spectral Content ◽  
Hearing Sensitivity ◽  
Subjective Magnitude ◽  
Orderly Fashion ◽  
Viiith Nerve

The unconditioned GSR’s elicited by tones of 60, 70, 80, and 90 dB SPL were largest in the mouse in the ranges around 10,000 Hz. The growth of response magnitude with intensity followed a power law (10 .17 to 10 .22 , depending upon frequency) and suggested that the unconditioned GSR magnitude assessed overall subjective magnitude of tones to the mouse in an orderly fashion. It is suggested that hearing sensitivity as assessed by these means may be closely related to the spectral content of the mouse’s vocalization as well as to the number of critically sensitive single units in the mouse’s VIIIth nerve.

How Useful is the Power Law of Practice for Recognizing Practice in Concentration Tests?

2007 ◽  
Vol 23 (3) ◽  
pp. 157-165 ◽  
Author(s):  
Carmen Hagemeister
Keyword(s):  
Logistic Regression ◽  
Reaction Time ◽  
Power Law ◽  
Error Rate ◽  
Reaction Times ◽  
Practice Effect ◽  
Practice Effects ◽  
Rate Decrease ◽  
Small Practice

Abstract. When concentration tests are completed repeatedly, reaction time and error rate decrease considerably, but the underlying ability does not improve. In order to overcome this validity problem this study aimed to test if the practice effect between tests and within tests can be useful in determining whether persons have already completed this test. The power law of practice postulates that practice effects are greater in unpracticed than in practiced persons. Two experiments were carried out in which the participants completed the same tests at the beginning and at the end of two test sessions set about 3 days apart. In both experiments, the logistic regression could indeed classify persons according to previous practice through the practice effect between the tests at the beginning and at the end of the session, and, less well but still significantly, through the practice effect within the first test of the session. Further analyses showed that the practice effects correlated more highly with the initial performance than was to be expected for mathematical reasons; typically persons with long reaction times have larger practice effects. Thus, small practice effects alone do not allow one to conclude that a person has worked on the test before.

Inverse Power Law Behavior in a Memory Scanning Experiment

2006 ◽  
Author(s):  
Gerardo Ramirez ◽  
Sonia Perez ◽  
John G. Holden
Keyword(s):  
Power Law ◽  
Inverse Power ◽  
Memory Scanning ◽  
Inverse Power Law
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