In two experiments, we used response signals (RSs) to control processing time and trace out speed--accuracy trade-off(SAT) functions in a difficult perceptual discrimination task. Each experiment compared performance in blocks of trials with constant and, hence, temporally predictable RS lags against performance in blocks with variable, unpredictable RS lags. In both experiments, essentially eq...

Simple bioaccumulation models predict a monotonic increase in concentration with time until an equilibrium concentration is reached. However, unconsidered dynamics including deterministic oscillations occur if realistic time lags are incorporated. Stability criteria are provided for difference and differential forms of the simplest model. These criteria provide the means of identifying systems ...

Using the Rossi X-ray Timing Explorer we have measured ∼27μs time delays in 830Hz quasiperiodic oscillations (QPO) between 4–6keV and 11–17keV in 4U 1608–52, with high-energy photons lagging low energy photons, and found upper limits to the time delays of 45μs between 2–6.5keV and 6.5–67keV in ∼730Hz QPO in 4U 0614+091 and 30μs between 8.7–12.4keV and 12.4–67keV in ∼870Hz QPO in 4U 1636–53. We ...

• Autocorrelation Function (ACF): Autocorrelation is a statistical measure of the relationship, if any, between a random variable and itself, at different time lags. The autocorrelation coefficient can range between +1 (very high positive correlation) and -1 (very high negative correlation). The Autocorrelation function (ACF) shows the value of the autocorrelation coefficient for different time...

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The purpose of this article is to analyze the dynamic trend of spatial dependence, which is not only contemporary but time-lagged in many socio-economic phenomena. Firstly, we show some of the commonly used exploratory spatial data analysis (ESDA) techniques and we propose other new ones, the exploratory space-time data analysis (ESTDA) that evaluates the instantaneity of spatial dependence. We...

In this paper, the Bernstein polynomials are used to approximate the solutions of linear integral equations with multiple time lags (IEMTL) through expansion methods (collocation method, partition method, Galerkin method). The method is discussed in detail and illustrated by solving some numerical examples. Comparison between the exact and approximated results obtained from these methods is car...

The resource-constrained project scheduling problem is to find a schedule that minimizes the project duration subject to precedence relations and resource constraints. To further account for economic aspects of the project, one may add an objective of cash nature to the problem. In addition, dynamic nature and variations in real world are known to introduce uncertainties into data. Therefore, t...

We use a 100 ks long XMM-Newton observation of the Narrow-Line Seyfert 1 galaxy Ark 564 and combine it with the month-long monitoring of the same source produced by ASCA, to calculate the phase lags and coherence between different energy bands, over frequencies ∼ 10 to 10 Hz. This is the widest frequency range for which these spectral-timing properties have been calculated accurately for any AG...