http://hdl.handle.net/10453/11545 2013-05-22T02:20:21Z http://hdl.handle.net/10453/19436 Green nanotechnology Smith Geoffrey Raúl J. Martín-Palma; Yi-Jun Jen; Tom G. Mackay Nanotechnology, in particular nanophotonics, is proving essential to achieving green outcomes of sustainability and renewable energy at the scales needed. Coatings, composites and polymeric structures used in windows, roof and wall coatings, energy storage, insulation and other components in energy efficient buildings will increasingly involve nanostructure, as will solar cells. Nanostructures have the potential to revolutionize thermoelectric power and may one day provide efficient refrigerant free cooling. Nanomaterials enable optimization of optical, opto-electrical and thermal responses to this urgent task. Optical harmonization of material responses to environmental energy flows involves (i) large changes in spectral response over limited wavelength bands (ii) tailoring to environmental dynamics. The latter includes engineering angle of incidence dependencies and switchable (or chromogenic) responses. Nanomaterials can be made at sufficient scale and low enough cost to be both economic and to have a high impact on a short time scale. Issues to be addressed include human safety and property changes induced during manufacture, handling and outdoor use. Unexpected bonuses have arisen in this work, for example the savings and environmental benefits of cool roofs extend beyond the more obvious benefit of reduced heat flows from the roof into the building. 2011-01-01T00:00:00Z http://hdl.handle.net/10453/16748 Ad Hoc Networks: A Flexible and Robust Data Communication Abolhasan Mehran; Wysocki Tadeusz Jie Wu The 1990s witnessed a rapid growth in research interests in mobile ad hoc networks (MANETs). The infrastructureless and dynamic nature of these networks demand that a new set of networking strategies be implemented to provide efficient end-to-end communication. This, along with the diverse application of these networks in many different scenarios, such as battlefield and disaster recovery, have seen MANETs being researched by many different organizations. MANETs employ the traditional TCP/IP structure to provide end-to-end communication between nodes. However, due to their mobility and the limited resources in wireless networks, each layer in the TCP/IP model requires redefinition or modifications to function efficiently in aMANET. One interesting research area inMANETs is routing. Routing inMANETs is a challenging task and has received a tremendous amount of attention from researchers. This has led to the development of many different routing protocols for MANETs. This chapter presents a discussion on a number of different routing protocols proposed for ad hoc networks and presents a number of future challenges in ad hoc and mobile ad hoc networking. 2006-01-01T00:00:00Z http://hdl.handle.net/10453/16747 Adaptive RS-group scheduling for WiMAX Multihop Relay Saeed Ra; Al-Talib Sa; Al Ahdal Ta; Mohamad H; Abbas M; Ali Bm; Odeh Nidhal NA IEEE 802.16j Multihop Relay (MR) is an optional deployment introduced to enhance the coverage and performance of WiMAX network without the need for deploying costly Base Stations (BSs). Multihop Relay network comprises of Multihop Relay BS (MRBS) and Rel 2010-01-01T00:00:00Z http://hdl.handle.net/10453/12106 Teaching about Firewall Concepts using the iNetwork Simulator Ye Melissa; Sandrasegaran Kumbesan Braun, R. The iNetwork Simulator is a software application created provides a user-friendly graphical interface for building and simulating basic communication networks. Such networks can comprise of devices such as workstations, servers, switches and routers. This project enhances the iNetwork Simulator application by allowing firewalls to be simulated. Firewalls play in integral part in the security infrastructure of many organisations (and individuals). Being able to interact with a virtual firewall would benefit many students with an interest in the security-related aspects of communication networks. The firewall component was implemented using the Microsoft .NET Framework and the C# programming language (the same platform used to originally develop the iNetwork Simulator application). The full software development lifecycle was followed during the course of this project 2006-01-01T00:00:00Z