The object of this project is to present a novel digital audio effect based on a real-time, windowed block-based FFT and inverse FFT. The effect is achieved by mirroring the spectrum, producing a sound effect ranging from a purer rendition of the original, through a rougher one, to a sound unrecognisable from the original. A mirror taking the shape of a conic section is constructed between cert...

The surface force apparatus (SFA) was utilized to obtain force-distance profiles between silica-supported membranes formed by Langmuir-Blodgett deposition of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC). In the absence of a membrane, a long-range electrostatic repulsion and short-range steric repulsion are measured as a result of the deprotonation of silica in water and the roughness of t...

In this study, the effects of chemical modifications of oil palm mesocarp fiber (OPMF) via bleaching, silane coupling agents, and combinations of the two on the composition and morphology of OPMF were investigated. The chemically modified OPMF was characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The FTIR s...

A method has been developed which automatically extracts river and river bank locations from arbitrarily sourced high resolution ("lm) visual spectrum imagery without recourse to multi-spectral or even color information. This method relies on quantifying the difference in image texture between the relatively smooth surface of the river water and the rougher surface of the vegetated land or buil...

Self-assembled monolayers (SAMs) derived from adsorption of n-alkanethiols onto the surfaces of copper slow the oxidation of the copper surface by ieaction with atmospheric dioxygen. Angstrom-lervel changes in the thickness of the monolayer result in readily observable differences (by X-ray pirotoelectron spectroscopy, XPS) in the rates of oxidation of the copper and adsorbed thiolates. The rat...

Recently, a novel dental restorative composite based on nanostructured micro-fillers of anodic porous alumina has been proposed. While its bulk properties are promising thanks to decreased aging and drug delivery capabilities, its surface properties are still unknown. Here we investigated the surface morphology and the adhesion to tooth dentin of this composite as prepared. For comparison, we u...

Due to the improvement of image rendering processes, and the increasing importance of quantitative comparisons among synthetic color images, it is essential to define perceptually based metrics which enable to objectively assess the visual quality of digital simulations. In response to this need, this paper proposes a new methodology for the determination of an objective image quality metric, a...

Polystyrene-poly(acrylic acid) (PS-PAA) block copolymers polymerized by atom transfer radical polymerization were covalently grafted to both smooth and microtextured surfaces. These amphiphilic copolymers were utilized to create smart surfaces, which can be responsive to external stimuli, e.g., pH values or organic solvent. Atom force microscopy, field emission scanning electron microscopy, and...

Copper and cobalt demand is projected to be increased from here 2050 the challenge find treat economically minerals which contains those metals. Several tailings oxide ores throughout word contain good grades of copper that should recovered by froth flotation. This paper investigates recovery through reprocessing spiral classifier determination specific reagents dosage. The flotation behaviours...

The present work explored effects of laser surface melting on microstructure and topography evolution in AZ31B magnesium alloy. Thermokinetic experienced by the material during were simulated using a multiphysics finite element model. Microstructure phase examined scanning electron microscopy, X-ray diffraction, back scatter diffraction. Surface was evaluated white light interferometry. interac...