http://hdl.handle.net/10453/27 2013-05-18T09:04:45Z 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/10453/19327 Multi-hop and directed routing based on neighborhood cooperation in WSN Nikodem Jan; Klempous Ryszard; Nikodem Maciej; Chaczko Zenon Imre Rudas The paper describes a relational abstraction of neighborhood cooperation for the Wireless Sensor Network (WSN) where node can identify its neighbors around it. Since radio links have limited range only some nodes have a direct contact with the Base Station (BS) and data transmission is executed using multi-hop communication to ensure that information is send from one node to another towards the BS. The novel abstract uses a subordination relation, to manage the neighbor cooperation between the WSN nodes, that exploits topological properties of the WSN. Based on the hop-distance from the BS, any node k is able to establish a set N<(k) consisting of nodes to which k has to send communication messages in order to maintain the data-flow direction towards the BS. 2011-01-01T00:00:00Z http://hdl.handle.net/10453/19326 The case for ICT work-integrated learning from graduates in the workplace Koppi Tony; Edwards Sylvia; Sheard Judy; Naghdy Fazel; Brookes Wayne Clear, T. and Hamer, J. An online survey of recent ICT graduates in the workplace was carried out as part of a recent project funded by the Australian Learning and Teaching Council. The survey was concerned with the ICT curriculum in relation to workplace job requirements and university preparation for these requirements. The survey contained quantitative and qualitative components and findings from the former have been published (Koppi et al., 2009). This paper reports on a quantitative comparison of responses from graduates who had workplace experience and those who did not, and a qualitative analysis of text responses from all ICT graduates to open-ended questions concerning the curriculum and their perceived university preparation for the workplace. The overwhelming response from ICT graduates in the workplace was for more industry related learning. These industry relationships included industry involvement, workplace learning and business experience, up-to-date teaching and technologies, practical applications, and real-world activities. A closer relationship of academia and industry was strongly advocated by ICT graduates in the workplace. 2010-01-01T00:00:00Z http://hdl.handle.net/10453/19329 An Integrated Model Supporting Billing and QOS in the internet Myint Hla; Nanda Priyadarsi Morshed Chowdhury; Sid Ray; Roger Lee This article develops a charging scheme that is simple and easily usable for the users and provides them with the incentives to use only the resources they need. This scheme is developed on the time-volume charging approach to show how the contributing providers can share the total charge earned by each mobile and wireless service instance in a fair way, with each provider collecting the portion of charge that corresponds to the consumption of its own resources for the service. This is alos an important issue for the commercial viability of mobile service to mobile users, given that its provision spans multiple domains. Our proposed architecture is compliant to the relevant standards and can serve as a basis for applying other internet charging schemes as well 2011-01-01T00:00:00Z