Edith Cowan University

About: Edith Cowan University is a education organization based out in Perth, Western Australia, Australia. It is known for research contribution in the topics: Population & Context (language use). The organization has 4040 authors who have published 13529 publications receiving 339582 citations. The organization is also known as: Edith Cowan & ECU.

Pervasive 2D Barcodes for Camera Phone Applications

Abstract: In a previous study, we evaluated six 2D barcodes using eight criteria for standardization potential: omnidirectional symbol reading, support for low-resolution cameras, reading robustness under different lighting conditions, barcode reading distance, error correction capability, security, support for multiple character sets, and data capacity. We also considered the fidelity of the camera phone's captured image as a metric for gauging reading reliability. Here, we review the six 2D barcodes and then use an additional metric - a first-read rate - to quantitatively verify our earlier results and better gauge reading reliability.

Amorphous Fe78Si9B13 alloy: An efficient and reusable photo-enhanced Fenton-like catalyst in degradation of cibacron brilliant red 3B-A dye under UV–vis light

Abstract: The development of new functional applications of amorphous alloy is an active and challenging topic. In this work, amorphous Fe78Si9B13 alloy, a photo-enhanced Fenton-like catalyst, exhibits excellent functional ability in degrading an azo dye. This study reports the dramatic performance gains achieved for photo-enhanced Fenton-like degradation of cibacron brilliant red 3B-A (BR3B-A) dye aqueous solutions, the reusability of amorphous Fe78Si9B13 alloy ribbon catalysts, and the reaction kinetics (k) of the process. The individual and synthetical effects of the various reaction parameters are investigated by employing an orthogonal matrix (L16(45)) experimental methodology. The investigation evaluates the impact of these parameters on the degradation process, in order to demonstrate that UV–vis light could continuously induce hydroxyl radicals ( OH) to be generated in the dye aqueous solution and significantly enhance the rate of dye degradation and mineralization. The experimental results show that nearly 100% color removal is achieved within 5 min under conditions of 2.0 g/L Fe78Si9B13 ribbons, 0.5 M H2O2 and pH 2. UV–vis light intensity ranging from 0 to 7.7 μW/cm2 enhances a dramatic improvement in color removal from 78% at 200 min to 98% at 60 min and an improvement in the reaction kinetics (k) from 0.0413 at 0 μW/cm2 of light irradiation to 0.2901 at 7.7 μW/cm2 of light irradiation under conditions of 2.0 g/L Fe78Si9B13 ribbons, 0.5 M H2O2 and natural pH 6.45. The production of OH is investigated by adding tertiary butanol, resulting in a sharp decrease of dye color removal. Structural characterizations of as-received amorphous Fe78Si9B13 ribbons and of recycled Fe78Si9B13 ribbons are also investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD), UV–vis diffuse reflectance spectrophotometers (UV–vis DRS), scanning electron microscope (SEM) and energy-dispersive X-ray spectroscopy (EDS); the results reveal a slight decay of the reused Fe78Si9B13 ribbons, along with a gradual precipitation of crystallized α-Fe, iron oxide and SiO2 on the ribbon surface over the few cycles of usage.