This article examines the extent to which cultural capital helps to explain the link between social background and gaining an offer for study at the University of Oxford. We find that cultural knowledge, rather than participation in the beaux arts, is related to admissions decisions. This effect is particularly pronounced in arts subjects. We only partly support Bourdieu’s postulation of cultur...

This paper presents the synthesis and practical implementation of a robust digital differentiator that provides the first and second derivative of a sampled smooth signal. The robustness of the proposed digital device, based on second-order slidingmodes (2-SMs), is analyzed with respect to measurement errors. Experimental results on an induction motor (IM) drive show that fast and accurate esti...

In this work, a photovoltaic (PV) system integrated with non-inverting DC-DC buck-boost converter to extract maximum power under varying environmental conditions such as irradiance and temperature is considered. order (via transfer theorem), robust nonlinear arbitrary sliding mode-based control designed for tracking the desired reference, which generated via feed forward neural networks (FFNN)....

Microring-based photonic fractional differentiators play an important role in the on-chip all-optical signal processing. Unfortunately, the previous works do not consider the time-reversal and the time delay characteristics of the microring-based fractional differentiator. They also do not include the effect of input pulse width on the output. In particular, it cannot explain why the microring-...

Sampled-data control requires both on-sample and intersample performance in high-precision mechatronic systems. The aim is to design a discrete-time linearly parameterized feedforward controller improve multi-modal motion system. continuous-time considered as state compatibility by multirate zero-order-hold differentiator. developed approach enables the for sampled-data systems with physically ...

The main problem in differentiator design is to combine differentiation exactness with robustness in respect to possible measurement errors and input noises. The proposed differentiator provides for proportionality of the maximal differentiation error to the square root of the maximal deviation of the measured input signal from the base signal. Such an order of the differentiation error is show...

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VFA is used for most of the analog circuit design but in many high frequency applications like integrator and differentiator it’s finite slew rate, finite gain bandwidth product limitation degrades its performance. Thus, the introduction of CFA possessing a number of advantages including high slew rate due to its current feedback architecture, closed loop bandwidth that is independent of closed...

By employing the generalized fractional differential operator, we introduce a system of fractional order derivative for a uniformly sampled polynomial signal. The calculation of the bring in signal depends on the additive combination of the weighted bring-in of N cascaded digital differentiators. The weights are imposed in a closed formula containing the Stirling numbers of the first kind. The ...