Unit root tests for time series with level shifts are considered. The level shift is assumed to occur at a known time point. In contrast to some other proposals the level shift is modeled as part of the intercept term of the stationary component of the data generation process which is separated from the unit root component. In this framework simple shift functions result in a smooth transition ...

Tantalum oxide memristors can switch continuously from a low-conductance semiconducting to a high-conductance metallic state. At the boundary between these two regimes are quantized conductance states, which indicate the formation of a point contact within the oxide characterized by multistable conductance fluctuations and enlarged electronic noise. Here, we observe diverse conductance-dependen...

The maximization of one-dimensional piecewise linear concave (OPLC) functions arises in the line search associated with the maximization of piecewise linear concave functions (e.g. Kelley cutting plane method). The OPLC line search is usually done by the next-break-point method, where one goes from break point to break point up to the optimum. If the number of break points is large this method ...

This work presents and estimates the break-lock in phase locked loop (PLL) synthesizers for monopulse radar applications through experimental measurements and computer simulation. Sinusoidal continuous wave (CW) and linear frequency modulated (LFM) signals are used as repeater jamming signals. The CW jamming signal power as a function of radar echo signal power at break-lock is estimated for di...

Numerous methods of studying the sensibility of the skin have been reported. Martin (1) described the threshold of faradic break shocks; Ollendorf (2) used hair strokes, pin pricks, heat and pressure with a probe in normal and abnormal skin to determine differences in sensation; Mayr (3) utilized the pressure of a water manometer on normal and syphilitic skin; Hardy and Wolff (4) introduced the...

Abstract. — Einstein’s Doppler formula is not applicable when a moving point light source is close enough to the observer; for example, it may break down or cannot specify a determinate value when the point source and the observer overlap. In this paper, Doppler effect for a moving point light source is analyzed, and it is found that the principle of relativity allows the existence of intrinsic...