Comparability of EDA effects obtained with constant-current skin resistance and constant-voltage skin conductance methods

A constant-voltage and constant-current stimulus isolation unit.

When action potentials from a stimulated biological preparation are recorded i t is essential to isolate the stimulus resistively and capacitively from the ground in order to minimize stimulation artifacts. Such isolation can be achieved by using a transformer of special low-capacitance construction in the output of a stimulus generator (Donaldson 1958). The most widely used arrangement for the...

Measurement of electrogenic-pump current in Aplysia neurones with constant-current and constant-voltage techniques.

1. The responses of the abdominal and pleural giant cells to warming and cooling were studied using constant-current and constant-voltage techniques. 2. The potential change upon warming from about 7 degrees C to 22 degrees C was reversed by application of maintained inward current. The reversal potential was -77 +/- 12 mV. 3. The membrane conductance increased with warming, but was not affecte...

Effects of constant voltage and constant current stress in PCBM: P3HT solar cells

Leak Current Rectification in Myxicola Giant Axons Constant field and constant conductance components

Early leak current, i.e. for times similar to the time to peak of the transient current was measured in Myxieola giant axons in the presence of tetrodotoxin. The leak current-voltage relation rectifies, showing more current for strong depolarizing pulses than expected from symmetry around the holding potential. A satisfactory practical approximation for most leak corrections is constant resting...

Rough-wall turbulent boundary layers with constant skin friction

A semi-empirical model is presented that describes the development of a fully developed turbulent boundary layer in the presence of surface roughness with length scale ks that varies with streamwise distance x. Interest is centred on flows for which all terms of the von Kármán integral relation, including the ratio of outer velocity to friction velocity U+ ∞ ≡ U∞/uτ , are streamwise constant. F...