Resist variation

Figure 5 Resistance variation in function of the frequency (conic probe).

The resistance variation measure with a defect long than the coil length permit to calculate the defect length. 

The.se arc similar to stator resistance starters, as discussed in Section 4.2..3 and can be used in the rotor circuit to control the rotor side resistance. Figure 5.10 shows the smooth variation of resistance by electrolytic vaporization compared to a conventional metallic resistance variation. I hc self-variable resistance of electrolyte is equivalent to almost three or four steps of a metallic resistance and makes such starters economical. Normally one step is sufficient for motors up to 160 h.p. (For spccd-torquc... 

The exact resistance variations of a F, - 100, RTD over a range of temperatures are given in Table 12.2, and not very different from those calculated by the above equation and drawn in Figure 12.41. 

Eqn(3) allows a direct determination of LRO-parameter from resistivity measurement by using the constant A as a fit parameter. Eqn(l) is of more complicated character, where besides the SRO-parameters in the different coordination spheres there enter details of the band structure (Y,) which influence sign and magnitude of resistivity variation with degree of SRO. However, restricting to nearest neighbours and using an adequate model for the dependence of a on temperature and concentration, reliable SRO-parameters have been deduced from resistivity measurement for several solid solutions. ... 

The variation is independent of the mud weight, pressure, or temperature, but is sensitive to fluids other than gas, such as oil or saltwater. Figure 4-266 shows the resistivity variations for a Til m mud. If we assume that a change of 10% can be detected, then the alarm could be given again for a free gas or oil volumetric concentration of 2 to 5%. 

Compute the resistance variation for each gage due to torque. 

AR = resistance variation in n F = gage factor L = load in lb E = Young modulus A = sub cross-section or area in in. 

Figure 4-267. Sketch of a Wheatstone bridge for small resistance variations.

For DC polarization studies, the ratio of steady-state to initial current is not the transport number but determines the limiting current fraction , the maximum fraction of the initial current which may be maintained at steady-state (in the absence of interfractional resistances). Variations... 

Fig. 7. Root and shoot dry weight of wheat after 22 days of growth (5-leaf Stage) at various soil penetrometer resistances. Variations in penetrometer resistance were obtained by varying soil bulk density and water content. Symbols are as follows. Shape refers to bulk density (g cm ) 0,1.17 A, 1.29 , 1.37 <0, 1.41 V, 1.45. Shade refers to water content (g g dry soil) open symbols, 0.22 or 0.23 half-shaded, 0.25 closed, 0.27. Points are means s.E. (n = 6). Modified from Masle Passioura (1988).

Tabashnik, B.E. and N.L. Cushing. 1989. Quantitative genetic analysis of insecticide resistance variation in fenvalerate tolerance in a diamondback moth (Lepidoptera Plutellidae) population. Jour. Econ. Entomol. 82 5-10. 

The time constant will show a temperature dependence owing to thermal resistance variation and temperature-dependent heat capacitance. The differential - and more general - form of Eq. (3.33) is ... 

In the high-frequency range (/>10Hz), the series resistance variation with temperature can be neglected. In the low-frequency range, the ESR increases when the temperature decreases [54], This is caused by the electrolyte ionic resistance RT which is strongly influenced by the temperature. Above 0°C Rt varies slowly with the temperature. Below 0°C, the temperature dependency is more... 

The Wenner array should not be used unless the expected ground conditions are fairly simple. The Schlumberger array is less sensitive to lateral resistivity variations. 

Figure 32. Sensor potential and ballast resistance variations using sand particles. (Reproduced with permission from reference 24. Copyright 1987.)...

It is important for requalification that the numbers, resistances, and substrates for the Bis are closely similar to those used in the initial validation. For the same reasons as resistance variation within Bis as discussed before, it is possible if these factors are not well controlled to emerge from requalification with either a false confidence in the security of the process (use of Bis which are less resistant than those used in initial validation), or with the incorrect opinion that the process has failed (use of Bis which are more resistant than those used in initial validation). 

The skin s buffer capacity is its physiological capacity to resist variations in pH and keep the pH stable. 

One should note that the mean resistance variation dR of the different sensors can also be used for detection, and it can provide an additional independent equation. The relevant relation is then... 

Light scattering - Laser diffusion - Light absorption - X-ray absorption Laser diffraction - Light blockage - Permeametry - Sedimentation in a liquid - Sedimentation in a gas - Centrifugation - Electrical resistance variation... 

Resistance variation can be detected by either null-balance or deflection-balance bridge circuits. In a null-balance bridge the sensor resistance change is balanced (zero output) by a variable resistance in a bridge adjacent arm. The calibrated null adjustment is an indication of the change in sensor resistance. The deflection-balance method, on the other hand, makes use of the amount of bridge unbalance in order to determine the change in sensor resistance. 

Figure 1. Resistivity variations of comerdalized SnCte semiconductor sensor for various gases.

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