Estimates of teacher “value-added” suggest teachers vary substantially in their ability to promote student learning. Prompted by this finding, many states and school districts have adopted value-added measures as indicators job performance. In paper, we conduct a new test the validity models. Using administrative data from New York City, apply commonly estimated models an outcome cannot plausib...

Given the sensitivity of current ground-based Gravitational Wave (GW) detectors, any continuous-wave signal we can realistically expect will be at a level or below the background noise. Hence, any data analysis of detector data will need to rely on statistical techniques to separate the signal from the noise. While with the current sensitivity of our detectors we do not expect to detect any tru...

In this paper, unique approach is presented for the electroencephalography (EEG) signals analysis. This is based on Eigen values distribution of a matrix which is called as scaled Hankel matrix. This gives us a way to find out the number of Eigen values essential for noise reduction and extraction of signal in singular spectrum analysis. This paper gives us an approach to classify the EEG signa...

This paper presents a 14bit 500MS/s SHA-less pipelined analog-to-digital converter (ADC) implemented in 40nm CMOS. A high-linearity pseudo-differential push-pull input buffer with an anti-oscillation technique and nonlinear parasitism eliminate is proposed to stably drive the stages while keeping low distortion. Moreover, digital controlled aperture-error calibration also employed offset of com...

This paper is concerned with the problem of determining the typical features of a curve when it is observed with noise. It has been shown that one can characterize the Lipschitz singularities of a signal by following the propagation across scales of the modulus maxima of its continuous wavelet transform. A nonparametric approach, based on appropriate thresholding of the empirical wavelet coeffi...

This paper studies the “intermittent” chaos and subharmonics observed in switching dc/dc converters using a simple circuit model that describes possible unintended coupling of some weak spurious signal to the converter. The study shows that the signal strength and frequency of the intruding signal are vital parameters that affect the type of intermittent behaviour and the period of intermittenc...

Figure 12: a) High-level block diagram of the segmented quantizer; b) quantization block details; c) signal processing model .. Figure 16: Estimated power spectra of a) the quantization noise sequences, and b) the running sums of the quantization noise sequences of the first-order ∆Σ modulator and the segmented quantizer presented in Section IV before and Ian Galton supervised the research whic...

Today's basestation systems (BTS) have to meet a variety of different standards and must fulfill critical specifications in various blocks of the signal chain. The following paper identifies these demands in signal chain components such as high dynamic performance ADCs, variable gain amplifiers, mixers and local oscillators and details their use in a typical BTS application and how they meet th...

This letter proposes a parasitic elimination bootstrapped switch and fast settling residual amplifier to be used in multiplying digital-to-analog converter (MDAC) order improve the performance of pipelined ADC at high frequency. The improves sampling spurious free dynamic range (SFDR) by more than 6dB shielding nonlinear capacitance MOS transistor substrate. In addition, frequency, negative zer...