sinusoidal. Relaxation oscillator generates the triangular, saw tooth and other non-sinusoidal waveforms. Sinusoidal oscillators consist of amplifiers. 2409Sinusoidal and Non-sinusoidal Oscillators 2409 (e) Heterodyne or beat-frequency oscillator (BFO). The active devices (bipolars, FETs or unijunction. To generate the AC voltage, the oscillator circuit will receive the energy from a DC The Osc...

This paper demonstrates how parsimonious models of sinusoidal functions can be used to fit spatially variant time series in which there is considerable variation of a periodic type. A typical shortcoming of such tools relates to the difficulty in capturing idiosyncratic variation in periodic models. The strategy developed here addresses this deficiency. While previous work has sought to overcom...

SUMMARY This paper demonstrates how parsimonious models of sinusoidal functions can be used to fit spatially variant time series in which there is considerable variation of a periodic type. A typical shortcoming of such tools relates to the difficulty in capturing idiosyncratic variation in periodic models. The strategy developed here addresses this deficiency. While previous work has sought to...

In this paper two low-cost PC-AT compatible boards, specially developed for completely automate the measuring procedure of a SEIKEN DTC-158 Resonant Column Apparatus and a SEIKEN DTC-199 Cyclic Triaxial Torcional Apparatus for cohesive and non-cohesive soils are described. One of the boards performs the measuring functions that include the measurement of voltages, frequencies and phase differen...

The effect of wave velocity on resonance line polarization is studied. We assumed a photosphere chromosphere type of temperature structure for the atmosphere with plane parallel symmetry. The ”Discrete Space Theory technique” to solve the polarized radiative transfer in the presence of velocity fields and under the assumption of Complete Redistribution mechanism is briefly described alongwith t...

Ahstraet-A linear perturbation method is used to solve the two-dimensional heat conduction problem in which a liquid, initially at the melting temperature, becomes solidified by heat transfer to a plane mold the temperature of which is approximately uniform, but contains a small sinusoidal perturbation in one space dimension. Results are obtained for the consequent sinusoidal perturbation in th...

Psychophysical functions for perceived roughness, relating ln (magnitude estimate of roughness) to ln (groove width), were obtained for blind and sighted participants in virtual reality using the PHANToM force feedback device. The stimuli were sinusoidal surfaces with groove widths between 0.675 mm and 20.700 mm. Group functions showed a similar nonlinearity to those obtained in physical realit...