If these terms are not unity, the gradients quickly become either very large or very small.
Electrical conductivity is the current or the quantity of electricity passing per second through a similar slab when the potential gradient is unity, and it is the reciprocal of the resistivity.
The vertical lines represent the DIcrit for each curve, at which the gradient equals unity.
From them, the DIs at which the gradients equaled unity (the "critical DI" or DIcrit) were calculated from the equation: critical DI = − τ ⋅ ln (τ A ) A set of 16 WT and 16 Scn5a+/− mice were used for MAP and BEG measurements, with one-half of each group exposed to flecainide and one-half to quinidine.
17 The 'restitution hypothesis' states that transient APD alternans will occur when the slope of the restitution curve does not equal zero, becomes sustained when it is at unity and becomes unstable when the gradient exceeds one (figure 2).
Linear regression analysis between initial velocity with 20 Hz stimulation and initial velocity without stimulation confirmed this key interaction, demonstrated by a gradient that was less than unity (r = 0.980, F[1,12] = 601.6, p < 0.001; mean gradient 0.897 with 95% CL 0.817 to 0.977, t = 24.5, p < 0.001; Figure 4A).
Unless otherwise specified, NMR spectra were recorded at 40 °C on Varian 600, 800, and 900 MHz Unity-Inova spectrometers equipped with z-axis gradient cold probes.
In heat, conductivity is the quantity of heat passing per second through a slab of unit cross-sectional area when the temperature gradient between the two faces is unity.
The maximal gradient, of logW versus logσ, i.e. at the optimum point, is unity.
