Resistive behaviour

In order to evaluate the electrode configuration, similar experiments were performed as described in the previous section, and the results were compared in order to determine whether the electrodes behave identically in the absence and presence of cotton. As expected, similar results were obtained concerning the relationships Equation 10.1 is also valid for electrodes immersed in cotton that act as an immobilising substance for the electrolyte, but the value of k is different. Indeed, all experimentally obtained curves are shifted towards higher resistive behaviour, which can be explained by the fact that the presence of cotton forms a barrier for the conductivity of ions through the electrolyte solution. However, as explained in the previous section, k can be obtained by calibrating the electrode setup, so calibration in the presence of cotton circumvents the problem of different results in the absence and presence of cotton. 

Fig. 7 Resistivity behaviour of cuprates showing linear temperature variation of resistivity in the normal (metallic) state. The linearity can be extended down to 0 K.

Al-Saidi LF, Mortensen K, Almdal K (2003) Environmental stress cracking resistance behaviour of polycarbonate in different chemicals by determination of the time-dependence of stress at constant strains. Polym Degradat Stabil 82(3) 451—461... 

I-V curve of the OFF state generally exhibits three different regions of resistance behaviour as the voltage increases. In the first portion, the behaviour is Ohmic, while in the second it exhibits Poole-Frenkel... 

Antibiotic resistance behaviour of 308 enterococci isolated from Bryndza cheese is shown in Fig. 5. All enterococcal isolates from Bryndza cheese were susceptible to ampicillin, streptomycin, gentamicin, vancomycin, and teicoplanin. For these same isolates, resistance rates to rifampicin, erythromycin, ciprofloxacin, and... 

Fig. 5 Antibiotic resistance behaviour of 308 enterococci isolated from Bryndza. Ampicillin (AMP), streptomycin (STR), gentamicin (GEN), vancomycin (VAN), teicoplanin (TEI), rifampicin (RIF), erythromycin (ERY), ciprofloxacin (CIP), and nitrofurantoin (NIT)...

An exponential gradient, which reduces the thermomechanical stress in the ceramic region of an FGM by increasing the thickness of this zone, could therefore be detrimental for the crack resistance behaviour of the FGM. 

Even if a new chemical is a member of an existing fungicide class one cannot be sure of its resistance behaviour. In... 

Although such an anomalous magnetic low-temperature behaviour, as observed in URuAl and URuGa, is frequently associated with spin-fluctuation effects, other possible explanation cannot be omitted. Possible explanation in terms of band effects may be considered since no anomaly was found in the temperature dependence of the specific heat (no T3 In T term) and the y-values are 45 and 52 mJ/mol K2, respectively. By contrast the resistivity behaviour supports the first interpretation (Havela et al. 1985a, Sechovsky et al. 1986b). 

Figure 5.25 shows the AC properties (dielectric constant/ dielectric loss factor) at 23°C as a function of the frequency. The differences found in the volume resistivity of these systems are also reflected in the AC properties. The strong decrease of the dielectric constant as a function of the frequency for the system cured with EPIKURE 160/161 indicates a certain amount of capacitive coupling between the conducting carbon black particles. The dielectric loss factor/frequency relation of this system is nearly linear with a slope of about -l, pointing at a pure resistive behaviour (see equation 5.18). 

Fig. 10 Resistivity behaviour of Lao.9Cao.iMn03 at zero Held (0 T) and in a magnetic field (6 "O (from ref. 23)...

The use of polyaniline coated substrates in these structures is particularly adequate since they exhibit a resistive behaviour. 

Ce(Ag, In) system are given in fig. 5 (Ihrig, 1973). The hysteresis observable in the p vs. T curve is due to this structural transition. Fig. 6 gives a survey of the transition temperatures of such systems (Ihrig and Methfessel, 1976a). The transition temperature was obtained from the midpoint of the hysteresis loops. The anomalies in the resistivity behaviour can therefore be understood by a dramatic change of the phonon spectrum at this transition. 

Fig. 18. p vs. T curves of PrCu2, NdCu2, and SmCu2. The inset shows the resistivity behaviour in the vicinity of the Jahn-Teller transition temperature in PrCu2 (Sassik and Gratz, 1981). 

Fig. 40. The electrical resistivity behaviour at low temperatures of the ferromagnetic GdNi, the antiferromagnetic TbCu and the non-mag-netic LaNi.

Placed on the body, pressure sensors are able to detect some movement. Dunne et al. (2005) prototyped a sleeveless sensing shirt with six pressure sensors made of Ppy-coated polyurethane foam. The foam exhibits a piezo-resistive behaviour in response to changes in pressure. The shirt was found to be able to detect shoulder and neck movements and shoulder-blade pressure. However, issues around ageing of the sensor and hysteresis still need to be resolved. 

Testing of Plastics - Instrumented Charpy impact test Procedure for determining the crack resistance behaviour using the instrumented impact test Part I Determination of characteristic fracture mechanics parameters for resistance against unstable crack propagation Part II Determination of characteristic fracture mechanics parameters for resistance against stable crack propagation... 

Fig. 12.14 SEM images of weaves and their corresponding fibres (a) polyester microfibre twill weave before coating (b) cotton lawn plain weave before coating (c) polyester fibre screen printed with YP17 (d) cotton fibre screen printed with YP17. Gravimetric capacitance verus voltage obtained from cyclic voltammetry of cotton lawn tested in 1 MNa SO, at 10 and 100mVs (e) cyclic voltammogram of polyester microfibre tested in IMNa SO shows more resistive behaviour compared to (f) cotton.

A1 PANI Galvanostatic polarisation Tafel polarisation and EIS in 1% NaCl The pure PANI coating has a poor corrosion resistant behaviour due to galvanic action of PANI. [14]... 

The Ziman-Faber model for liquid metals (Ziman, 1961 Faber and Ziman, 1965) has been widely used to describe the resistivity behaviour of amorphous metals. It is based on the nearly-free-electron approach and the Boltzmann transport equation. When all multiple two-site scattering corrections are neglected, the resistivity for a pure liquid metal can be represented by means of the equation... 

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