1,720,999 research outputs found
A highly accurate method for managing missing reads in RFID enabled asset tracking
No full textRFID based tracking systems have to overcome some significant challenges such as uncertainty to improve accuracy. We describe a highly accurate and scalable location tracking algorithm achieved by integrating an object compression technique with particle filtering.Rengamathi Sankarkumar, Damith Ranasinghe, and Thuraiappah Sathya
Design and optimisation of power rectifiers for passive RFID systems in monolithic CMOS circuit
No full text© 2006 Society of Photo-Optical Instrumentation EngineersIn this paper, we present and analyze the most fundamental constraint of RFID systems, power rectification. This issue plays an important role in development of long-range RFID systems. Rectifiers are the key components in power rectifications and efficiency of an RFID system. Therefore this paper is concentrated in investigating this major issue. To tackle this problem a novel Schottky Barrier Diode (SBD) has been proposed. The proposed SBD provides good power conversion rate and switching properties.Behnam Jamali, Damith Ranasinghe, and Peter Col
Detuning effects of wearable patch antennas
No full textThe variations in the resonance frequency of a wearable 5.3 GHz textile patch antenna due to bending, human body proximity and moisture absorption are investigated. Noteworthy are the effects of proximity to human body tissue and moisture uptake, which are shown to cause variations up to 5% in the resonance frequency. Importantly, it is observed that the resonance frequency can shift both upwards or downwards depending on the loading affecting the antenna. These variations illustrate a general guideline for the maximum tuning range needed for wearable frequency-reconfigurable patch antennas.Sree Pramod Pinapati, Shengjian Jammy Chen, Damith Ranasinghe and Christophe Fumeau
PeerTrack: a platform for tracking and tracing objects in large-scale traceability networks
No full textThe ability to track and trace individual items, especially through large-scale and distributed networks, is the key to realizing many important business applications such as supply chain management, asset tracking, and counterfeit detection. Unfortunately, enabling traceability across independent organizations still poses significant challenges in dealing with large volume of data and sovereignty of the participants. This paper describes PeerTrack, a scalable platform for efficiently and effectively tracking and tracing objects in large-scale traceability networks. With a novel data model, a DHT-based indexer, and a distributed query processor, PeerTrack provides an environment where traceability applications can share data across independent organizations in a peer-to-peer fashion. This paper presents the motivation, system design, implementation, and a proof-of-concept system of the PeerTrack platform.Yanbo Wu, Quan Z. Sheng, Damith Ranasinghe and Lina Ya
Methodology for development and objective comparison of architectures for networked RFID
No full textBéla Pátkai, Damith Ranasinghe, Mark Harrison and Duncan McFarlanehttp://www.springer.com/engineering/production+eng/book/978-3-540-76861-6?detailsPage=to
Research degrees in Information and Communication Technology (ICT): why so few doctoral students?
No full textA ‘knowledge society’ relies on a workforce with high-level skills in Information and Communication Technology (ICT). Continuing development of ICT will arise partly from research undertaken by doctoral graduates. However, compared to other cognate disciplines, ICT has relatively few students taking up doctoral studies. This article explores some of the perceived barriers to undertaking doctoral studies in ICT in three Australian universities. Current students were surveyed regarding their post-course intentions relating to employment and further study, and the resulting data was analysed in terms of type of university attended, gender, nationality and first-in-family status. Overall, the perceived barriers to doing a research degree were related to the financial implications of such study and a limited understanding of what research in ICT involves. The following recommendations are made to universities and higher education policy-makers: that universities ensure that students have accurate information about the financial costs of doctoral studies; that students be provided with authentic undergraduate research experiences; and that pathways be developed to facilitate a smooth return to research degrees after periods of working in industry.Cally Guerin, Asangi Jayatilaka, Damith Ranasinghe, Alistair McCulloch and Paul Calde
A framework for distributed managing uncertain data in RFID traceability networks
Full text linkThe ability to track and trace individual items, especially through large-scale and distributed networks, is the key to realizing many important business applications such as supply chain management, asset tracking, and counterfeit detection. Networked RFID (radio frequency identification), which uses the Internet to connect otherwise isolated RFID systems and software, is an emerging technology to support traceability applications. Despite its promising benefits, there remains many challenges to be overcome before these benefits can be realized. One significant challenge centers around dealing with uncertainty of raw RFID data. In this paper, we propose a novel framework to effectively manage the uncertainty of RFID data in large scale traceability networks. The framework consists of a global object tracking model and a local RFID data cleaning model. In particular, we propose a Markov-based model for tracking objects globally and a particle filter based approach for processing noisy, low-level RFID data locally. Our implementation validates the proposed approach and the experimental results show its effectiveness.Jiangang Ma, Quan Z. Sheng, Damith Ranasinghe, Jen Min Chuah and Yanbo W
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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