University of Wollongong

About: University of Wollongong is a education organization based out in Wollongong, New South Wales, Australia. It is known for research contribution in the topics: Population & Context (language use). The organization has 15674 authors who have published 46658 publications receiving 1197471 citations. The organization is also known as: UOW & Wollongong University.

Synthesis of WO3@Graphene composite for enhanced photocatalytic oxygen evolution from water

Abstract: Nano tungsten oxide (WO3) particles were synthesized on the surface of graphene (GR) sheets by using a simple sonochemical method. The obtained composite, WO3@GR, was characterized by X-ray diffraction, N2adsorption/desorption analysis, thermo-gravimetric analysis, Raman spectroscopy and UV-vis diffuse reflectance spectra measurements. It was found that chemical bonds between the nano WO3 particles and the GR sheets were formed. The average particle size of the WO3 was evidenced to be around 12 nm on the GR sheets. When used as photocatalyst for water splitting, the amount of evolved O2 from water for the WO3@GR composite with 40 wt% GR inside was twice and 1.8 times as much as that for pure WO3 and mixed-WO3/GR, respectively. The excellent photocatalytic property of the WO3@GR composite is due to the synergistic effects of the combined nano WO3 particles and GR sheets. The sensitization of WO3 by GR enhances the visible light absorption property of WO3@GR. The chemical bonding between WO3 and GR minimizes the interface defects, reducing the recombination of the photo-generated electron–hole pairs. Furthermore, the GR sheets in the WO3@GR composite enhance electrons transport by providing low resistance conduction pathways, leading to improved photo-conversion efficiency. The methodology opens up a new way of obtaining photoactive GR-semiconductor composites for photodissociating water under visible light.

Integrating Social Networking Technologies in Education: A Case Study of a Formal Learning Environment

Abstract: The concept of Internet-facilitated social networking is not new - we have evidence of the development of the concept and the technologies over decades. However, Web 2.0 technologies and the emergence of social networking sites has expanded accessibility and use beyond levels that may have been thought imaginable just two or three years ago. These developments have been accompanied with calls to integrate the new technologies and experiences of social networks within formal education. Yet, there is limited research on the potential or outcomes of such initiatives. This paper presents a case study that examines the technology and experience in a formal education context.

Design-based research and doctoral students: Guidelines for preparing a dissertation proposal

Abstract: At first glance, design-based research may appear to be such a long-term and intensive approach to educational inquiry that doctoral students, most of whom expect to complete their PhD degree in 4-5 years, should not attempt to adopt this approach for their doctoral dissertations In this paper, we argue that design-based research is feasible for doctoral students, and that candidates should be encouraged to engage in it More specifically, we describe the components of a dissertation proposal or prospectus that utilizes design-based research methods in the context of educational technology research

Disturbance Observer-Based Robust Control and Its Applications: 35th Anniversary Overview

Abstract: Disturbance observer (DOB) has been one of the most widely used robust control tools since it was proposed by Ohnishi in 1983. This paper introduces the origins of DOB and presents a survey of the major results on DOB-based robust control in the last 35 years. Furthermore, it explains DOB's analysis and synthesis techniques for linear and nonlinear systems by using a unified framework. In final section, this paper presents concluding remarks on DOB-based robust control and its engineering applications.