Applied Science Private University

About: Applied Science Private University is a education organization based out in Amman, Jordan. It is known for research contribution in the topics: Catalysis & Population. The organization has 4124 authors who have published 5299 publications receiving 116167 citations.

Neural Background Subtraction for Pan-Tilt-Zoom Cameras

Abstract: We propose an extension of a neural-based background subtraction approach to moving object detection to the case of image sequences taken from pan-tilt-zoom (PTZ) cameras. The background model automatically adapts in a self-organizing way to changes in the scene background. Background variations arising in a usual stationary camera setting, such as those due to gradual illumination changes, to waving trees, or to shadows cast by moving objects, are accurately handled by the neural self-organizing background model originally proposed for this type of setting. Handling of variations due to the PTZ camera movement is ensured by a novel registration mechanism that allows the neural background model to automatically compensate the eventual ego-motion, estimated at each time instant. Experimental results on several real image sequences and comparisons with seven state-of-the-art methods demonstrate the accuracy of the proposed approach.

The Effect of Ownership Structure on Dividend Payout Policy: Evidence from Jordanian Context

Abstract: This research examines the possible association between ownership structure and Jordanian industrial public shareholding companies’ dividend payout policy. The present study examines the payout behavior of dividends for Jordanian industrial public shareholding companies over the period 2005-2007. The results consistently support that there is positive and significant relation between foreign ownership structure and the dividends payout policy through Tobin’s Q. However, the results document significant relationship between foreign ownership structure, company size and debt ratio and dividends policy measured by return on assets (ROA).

Sorption of perfluoroalkylated substances (PFASs) onto granular activated carbon and biochar.

Abstract: Perfluoroalkyl and polyfluoroalkyl substances (PFASs) have attracted increasing concerns owing to their potential ecotoxicological effects. The sorption of PFASs, i.e. perfluorooctanoic acid (PFOA)...

Prediction of an extremely large nonlinear refractive index for crystals at terahertz frequencies

Abstract: We develop a simple analytical model for calculating the vibrational contribution to the nonlinear refractive index ${n}_{2}$ (Kerr coefficient) of a crystal in terms of known crystalline parameters such as the linear refractive index, the coefficient of thermal expansion, the atomic density, and the reduced mass and the natural oscillation frequency of the vibrational modes of the crystal lattice. We show that the value of this contribution in the terahertz spectral region can exceed the value of the nonlinear refractive index ${n}_{2}$ in the visible and near-IR spectral ranges (which is largely electronic in origin) by several orders of magnitude. For example, for crystal quartz the value of the Kerr coefficient in the low-frequency limit is ${n}_{2}=2.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}$ esu or, equivalently, $4.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}\phantom{\rule{0.28em}{0ex}}{\mathrm{m}}^{2}$/W, which is very much larger than its value of $3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}20}\phantom{\rule{0.28em}{0ex}}{\mathrm{m}}^{2}$/W in the visible range. Furthermore, we present an analysis of the dispersion of ${n}_{2}$ in the terahertz spectral range and show that even larger values of ${n}_{2}$ occur at frequencies close to the vibrational resonances.