In this paper we present results of an analysis of radio-quiet QSO environments. The aim is to determine the relation between QSOs, galaxies and the mass distribution as a function of redshift. We cross-correlate a sample of 150 QSOs from optically and X-ray selected catalogues with faint, b J < 23, galaxies. These data allow us to probe the galaxy clustering environment of QSOs out to z 1:0 ? ...

The dynamics of the equal-time cross-correlation matrix of multivariate financial time series is explored by examination of the eigenvalue spectrum over sliding time windows. Empirical results for the S&P 500 and the Dow Jones Euro Stoxx 50 indices reveal that the dynamics of the small eigenvalues of the cross-correlation matrix, over these time windows, oppose those of the largest eigenvalue. ...

This study investigates the effects of the factors extracted from the autocorrelation function (ACF) and the interaural cross-correlation function (IACF) on annoyance of heavy-weight floor impact sound. First, heavy-weight floor impact sound was measured in rooms of apartments which have different sound insulation treatments and characterized by the ACF and IACF factors. Then, paired comparison...

This paper proposes a cross-associative neural network (CANN) for singular value decomposition (SVD) of a non-squared data matrix in signal processing, in order to improve the convergence speed and avoid the potential instability of the deterministic networks associated with the cross-correlation neural-network models. We study the global asymptotic stability of the network for tracking all the...

We present a novel method for generation of sets of the Cosmic Microwave Background (CMB) anisotropy maps, which reproduces the ∆l = 2 correlations associated with Alfvén turbulence. The method is based on the non-linear transformation of the CMB maps, which is obtained from the Monte Carlo simulation of the statistically isotropic Gaussian signal. Our method is computationally fast and efficie...

Four surface-wave tomographic models in the Pacific Northwest and a combined CRUST2.0 and AK135 model are tested and validated systematically. Synthetic Green’s functions calculated with the models using a finite-difference method are compared with empirical Green’s functions at periods of 7–50 s. To ensure highquality signals, empirical Green’s functions are extracted from the ambient noise cr...

Full-waveform acoustic logging has made significant advances in both theory and applic cation in recent years, and these advances have greatly increased the capability of log analysts to measure the physical properties of formations. Advances in theory provide the analytical tools required to understand the properties of measured seismic waves, and to relate those properties to such quantities ...

We explore in depth the validity of a recently proposed scaling law for earthquake interevent time distributions in the case of the Southern California, using the waveform cross-correlation catalog of Shearer et al. Two statistical tests are used: on the one hand, the standard two-sample Kolmogorov-Smirnov test is in agreement with the scaling of the distributions. On the other hand, the one-sa...

In sound reproduction it is usually desired to reproduce a sound source as accurate as possible to achieve a natural and realistic sound representation of the sound source. A perceptually motivated sound reproduction approach was suggested by [Grosse, van de Par, IEEE, 2015] where only the perceptually most relevant cues of a sound eld in the recording room are considered. These perceptually re...