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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
Translocation Of The Eastern Bristlebird 1: Radio-Tracking Of Post-Release Movements, David Bain, Kris French, Jack Baker, Jean Clarke
Translocation Of The Eastern Bristlebird 1: Radio-Tracking Of Post-Release Movements, David Bain, Kris French, Jack Baker, Jean Clarke
Faculty of Science - Papers (Archive)
Translocating birds to a new area of habitat to restore or supplement depleted populations may pose a significant threat to the translocated individuals. While for many species, translocated individuals appear to move larger distances than resident animals, species with poor dispersal capacity may be restricted in movements and translocation methods may need to accommodate differences in movements to ensure success. In this study, designed to provide insights to inform our broader programme of translocations in New South Wales, Australia, we investigated post-release movements in the endangered, semi-flightless Eastern Bristlebird (Dasyornis brachypterus). We predicted that movements would be minimal, with few …
T-S Fuzzy H Tracking Control Of Input Delayed Robotic Manipulators, Haiping Du, Weihua Li
T-S Fuzzy H Tracking Control Of Input Delayed Robotic Manipulators, Haiping Du, Weihua Li
Faculty of Informatics - Papers (Archive)
Time delays are often encountered by practical control systems while they are acquiring, processing, communicating, and sending signals. Time delays may affect the system stability and degrade the control system performance if they are not properly dealt with. Taking the classical robot control problem as an example, the significant effect of time delay on the closed-loop system stability has been highlighted in the bilateral teleoperation, where the communication delay transmitted through a network medium has been received widespread attention and different approaches have been proposed to address this problem (Hokayem and Spong, 2006). In addition, examples like processing delays in …
Multiresonator-Based Chipless Rfid System For Low-Cost Item Tracking, Stevan Preradovic, Isaac Balbin, Nemai Karmakar, Gerhard F. Swiegers
Multiresonator-Based Chipless Rfid System For Low-Cost Item Tracking, Stevan Preradovic, Isaac Balbin, Nemai Karmakar, Gerhard F. Swiegers
Faculty of Science - Papers (Archive)
A fully passive printable chipless RFID system is presented. The chipless tag uses the amplitude and phase of the spectral signature of a multiresonator circuit and provides I : 1 correspondence of data bits. The tag comprises of a microstrip spiral multiresonator and cross-polarized transmitting and receiving microstrip ultra-wideband disc loaded monopole antennas. The reader antenna is a log periodic dipole antenna with average 5.5-dBi gain. Firstly, a 6-bit chipless tag is designed to encode 000000 and 010101 IDs. Finally, a 35-bit chipless tag based on the same principle is presented. The tag has potentials for low-cost item tagging such …
Vehicle Tracking Using Projective Particle Filter, Azeddine Beghdadi, Philippe Bouttefroy, Son Lam Phung, Abdesselam Bouzerdoum
Vehicle Tracking Using Projective Particle Filter, Azeddine Beghdadi, Philippe Bouttefroy, Son Lam Phung, Abdesselam Bouzerdoum
Faculty of Informatics - Papers (Archive)
This article introduces a new particle filtering approach for object tracking in video sequences. The projective particle filter uses a linear fractional transformation, which projects the trajectory of an object from the real world onto the camera plane, thus providing a better estimate of the object position. In the proposed particle filter, samples are drawn from an importance density integrating the linear fractional transformation. This provides a better coverage of the feature space and yields a finer estimate of the posterior density. Experiments conducted on traffic video surveillance sequences show that the variance of the estimated trajectory is reduced, resulting …
Chemical Event Tracking Using A Low-Cost Wireless Chemical Sensing Network, Stephen T. Beirne, B Corcoran, K T Lau, D Diamond
Chemical Event Tracking Using A Low-Cost Wireless Chemical Sensing Network, Stephen T. Beirne, B Corcoran, K T Lau, D Diamond
Faculty of Science - Papers (Archive)
A recently developed low-cost light emitting diode (LED) chemical sensing technique is integrated with a Mica2Dot wireless communications platform to form a deployable wireless chemical event indicator network. The operation of the colorimetric sensing node has been evaluated to determine its reproducibility and limit of detection for an acidic airborne contaminant. A test-scale network of five similar chemical sensing nodes is deployed in a star communication topology at fixed points within a custom built Environmental Sensing Chamber (ESC). Presented data sets collected from the deployed wireless chemical sensor network (WCSN) show that during an acidic event scenario it is possible …
Simple, Robust And Accurate Head-Pose Tracking Using A Single Camera, Simon Meers, Koren Ward, Ian Piper
Simple, Robust And Accurate Head-Pose Tracking Using A Single Camera, Simon Meers, Koren Ward, Ian Piper
Faculty of Informatics - Papers (Archive)
This paper describes an inexpensive, robust method for tracking the head position and orientation of the user by using a single low-cost USB camera and infrared light emitting diodes concealed within spectacle frames worn by the user. Unlike gaze and head-pose tracking systems which rely on high-resolution stereo cameras and complex image processing hardware and software to find and track facial features on the user, the proposed system is able to efficiently locate and track the head's orientation and distance relative to the camera with little processing. Due to the infrared light emitting diodes having fixed geometry, the system does …
The Emerging Ethics Of Humancentric Gps Tracking And Monitoring, Katina Michael, Andrew Mcnamee, M G. Michael
The Emerging Ethics Of Humancentric Gps Tracking And Monitoring, Katina Michael, Andrew Mcnamee, M G. Michael
Faculty of Informatics - Papers (Archive)
The Global Positioning System (GPS) is increasingly being adopted by private and public enterprise to track and monitor humans for location-based services (LBS). Some of these applications include personal locators for children, the elderly or those suffering from Alzheimer’s or memory loss, and the monitoring of parolees for law enforcement, security or personal protection purposes. The continual miniaturization of the GPS chipset means that receivers can take the form of wristwatches, mini mobiles and bracelets, with the ability to pinpoint the longitude and latitude of a subject 24/7/365. This paper employs usability context analyses to draw out the emerging ethical …
Location-Based Intelligence – Modeling Behavior In Humans Using Gps, Katina Michael, Andrew Mcnamee, M G. Michael, Holly Tootell
Location-Based Intelligence – Modeling Behavior In Humans Using Gps, Katina Michael, Andrew Mcnamee, M G. Michael, Holly Tootell
Faculty of Informatics - Papers (Archive)
This paper introduces the notion of location-based intelligence by tracking the spatial properties and behavior of a single civilian participant over a two-week study period using a global positioning system (GPS) receiver, and displaying them on a geographic information system (GIS). The paper clearly shows the power of combining speed (S), distance (D), time (T) and elevation (E) data with the exact longitude and latitude position of the user. The issues drawn from the observation and the civilian’s personal diary are useful in understanding the social implications of tracking and monitoring objects and subjects using GPS. The findings show that …
Parameter Tracking For Stochastic Time-Varying Systems, Zheng Li
Parameter Tracking For Stochastic Time-Varying Systems, Zheng Li
Faculty of Informatics - Papers (Archive)
Describes a method for tracking fast time-varying parameters of dynamic systems under stochastic disturbances. Auxiliary information is used in addition to the plant input and output for better tracking accuracy.