Amplitude Of Electrical Signal Research Articles

Inertial magnetofluidic sensor

A new application of first kind levitation in magnetic fluids has been studied. Using the inertial properties of a diamagnetic or paramagnetic heavy body immersed in magnetic fluid positioned in a magnetic field gradient the possibility to achieve an inertial magnetofluidic sensor has been proved. A new method for detection and investigation of mechanical vibrations along the vertical direction was carried out. For verifying the method a device which receives mechanical vibrations and turns them into electrical signals has been made. The amplitude of electric signals and its dependence on the frequency and amplitude of mechanical vibrations has also been studied.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

The quantal content of optomotor stimuli and the electrical responses of receptors in the compound eye of the fly Musca.

Physical measurements of the energy content of effective optomotor stimuli for the fly Musca support the notion that single light quanta trapped by the photopigment of the retinal receptors generate adequate sensory messages. The results of an electrophysiological experiment on single retinula cells in the fly's eye are presented to strengthen confidence in certain assumptions it was necessary to adopt with regard to receptor optical and spectral properties in order to calibrate the complex movement stimuli. This experiment also emphasizes the small amplitude of electrical signals generated in the receptors by dim but behaviourally effective pattern illumination levels.