Conductance “plateau

The thermal conductivity plateau has traditionally been considered by most workers as a separate issue from the TLS. In addition to the rapidly growing magnitude of phonon scattering at the plateau, an excess of density of states is observed in the form of the so-called bump in the heat capacity temperature dependence divided by T. The plateau is interesting from several perspectives. For one thing, it is nonuniversal if scaled by the elastic constants (say, co/)... 

Sowada and Warman (1982) have described a dc conductivity method for Ar gas at 295 K and 45 atm. Following a 20-ns pulse of irradiation, the conductivity rises to a peak at -50 ns, due to the Ramsauer effect, before settling to a plateau, which is ascribed to thermal conductivity since the collecting field is very low. Since there is little electron loss, the conductivity profile is proportional to the mobility profile this in turn can be considered a kind of image of collision frequency as a function of electron energy. The time to reach the conductivity plateau, -150 ns, is the measure of thermalization time in the present case. At a density of -9 X 1021 cm-3, the conductivity maximum vanishes, indicating the disappearance of the Ramsauer minimum according to Sowada and Warman. 

The extension of the data analysis to 2D histograms provides correlations between three variables, such as conductance, plateau length, and their probabilities, and therefore may lead to a wealth of additional information, as compared to ID histograms. However, this is currently not yet fully exploited. Two examples of 2D histograms are the 2D conductance-distance histogram and the 2D covariance conductance histogram [54],... 

This behavior becomes more transparent in Fig. 30a,b, where the a.c.-con-ductivity a and relative dielectric constant (permittivity e ), respectively, for a series of less polar S-SBR-samples filled with various amounts of the coarse black N550 are show at 20 °C in a broader frequency range up to 107 Hz. For filler concentrations below the percolation threshold (O<0.15), the conductivity behaves essentially as that of an isolator and increases almost linearly with frequency. Above the percolation threshold (5>>0.2), it shows a characteristic conductivity plateau in the small frequency regime. Since at low frequencies the value of the conductivity a agrees fairly well with the d.c.-con-ductivity, the plateau value exhibits the characteristic percolation behavior considered above. In the high frequency regime the conductivity depicted in... 

After 1444 cycles of making contact - breaking contact operations an inner atomic structure of the Co-Ge contact has altered. We suppose that a material (both Co and Ge) in a junction region has degenerated because of many mechanical and thermal processes. Thermal processes are induced by the electrical current during measurements. The main conductance plateau is shifted from 2G0 to 1.5G0. One can see conductance traces before and after the... 

This model does not allow us to account for the shape of the curve obtained at high oxygen pressure, which displays a conductance plateau Q. 

Cramer C, Funke K, Saatkamp T, Wilmer D, Ingram MD (1995) High frequency conductivity plateau and ionic hopping processes in a ternary lithium borate glass. Z Naturforsch A Phys Sci 50 613-623... 

The conductivity patterns showed in Bode diagrams of Figures 9 and 10 shown a similar ac conductivity patterns with a frequency independent plateau in the low frequency region and exhibits dispersion at higher frequencies . The effect of electrode polarization is evidenced small deviation from the modulus of the conductivity (plateau region) value in the conductivity spectrum For the SILLPs studied, the geometric capacitors obtained from eq. (6) is independent on temperatrue. The values of these capacitors are 1.48,1.67,1.07,1.55, 2.30, and 2.56 pf for KN5, KN6, KN7, KN8, KN9 and KNIO, respectively. 

A precise knowledge of material properties (emissivities, conductivities and expansion coemdent for gap closing in the shroud) is of an extreme importance for having a good prediction of the thermal behaviour of the bundle. Different sensitivities studies have been performed to evaluate the effect of the uncertainties of each parameter on the test. Also the test conduct (plateau phase) can help to fulfil the test objectives. 

For a filled polymer system, the model of the sum of very high numbers of both systems in series and parallel. One of the limiting factors is the conductivity of the polymer. There reaches a point in all of these systems where the conductivity does not increase with additional filler addition. The system reaches a conductivity plateau. 

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