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March 2017

Yutong Liu – Formation Control and Reconfiguration strategies on Multi-agent Systems

March 23 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia 5005 Australia
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Abstract: Multi-agent systems have attracted much attention due to its distributed nature. Formation control, which is one of the most active topics within the realm of multi-agent systems, generally aims to drive multiple agents to achieve prescribed objectives on their states. Based on the sensing capability and interaction topology, formation control can be divided into three catalogues, position-based formation control, displacement-based formation control and distance-based formation control. Two-stage reconfiguration strategy is an approach which can reduce the mission time via…

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Yansong (Garrison) Gao – Physical Unclonable Function: Constructions and Applications

March 30 @ 4:00 pm - 5:00 pm

Abstract: Physical unclonable function (PUF), as a hardware security primitive, exploits manufacturing variations to extract secrets on demand. PUFs are increasingly adopted to provide security for pervasive and ubiquitous distributed resource-constraint smart Internet of Thing (IoT) devices as an alternative to storing a digital secret in the non-volatile memory (NVM). In fact, digital keys in the NVM are vulnerable to various attacks, especially, when there is no dedicated room in cost sensitive IoT devices to implement expensive protection mechanisms. By…

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April 2017

Daniel Headland – Efficient beam control in the terahertz range

April 13 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia Australia
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Abstract The terahertz range (0.1 to 10 THz) has potential for applications including high-volume short-range communications, non-invasive and non-destructive subdermal medical imaging, and safe imaging of personnel and postal items for security reasons. These capabilities are identified due to terahertz waves being of short-wavelength and are non-ionising. However, owing to factors including a lack of available power and significant atmospheric attenuation, it is challenging to maintain sufficient signal power over a realistic propagation distance for terahertz waves. For this reason,…

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Vichet Duk – Radar Target Detection in Sea Clutter Using Time Frequency Analysis

April 20 @ 4:00 pm - 5:00 pm

Abstract Small target detection in the maritime environment remains a challenging problem. Maritime radars traditionally use non-coherent processing methods due to the time-varying and range-varying nature of the Doppler spectra. Moreover, the detection scheme needs to be able to distinguish the target from the background interference (sea clutter and noise). However, the radar backscatter or interference may contain sea-spikes which can last for seconds and resemble targets. In the seminar, our recent results using time-frequency analysis to improve target detection…

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May 2017

Hongjun Yu – Swarm Intelligence and Multi-Mission Coordination

May 4 @ 4:00 pm - 5:00 pm

Abstract: In this talk, the formation control for a robotic swarm will be investigated. We concern that the sensors on the robots have limited ranges. Different additional setups are assumed. For example, there could be limited or none communication among the robots, the objective formation could have variable scales or be in an arbitrary shape. In any situation, robots have to work independently in an interactive and cooperative manner. The swarm should be capable of mission coordination and cope with…

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Richard Henry Edwin Matthews – Isolating lens aberrations within fixed pattern noise.

May 11 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia Australia
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Title: Isolating lens aberrations within fixed pattern noise. Sub-Title: Extending the image forensic fixed pattern noise model to allow for lens aberrations using Sony IMX219 CMOS system on a chip - pinhole photography for digital image forensics. Abstract: The forensic technic used to link photos to their source cameras involving fixed pattern noise has been used successfully to prosecute criminals involved in child exploitation material in Scotland. The method, first published by Lukas, Goljan and Friedrich in 2005, only took…

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An Phan – High Resolution ISAR & 3D InISAR Imaging

May 18 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia Australia
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Abstract: Inverse Synthetic Aperture (ISAR) imaging has been studied and developed into imaging systems in the last few decades to provide capabilities such as automatic target classification and recognition (ATC/ATR). Although ISAR has been widely used, it suffers from a fundamental limitation: the obtained image is a projection of the 3D target onto an image projection plane (IPP). The orientation of this plane is not known a priori as it depends also on the target dynamics during the coherent processing…

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A. S. Nazmul Huda – Efficient Evaluation of Components Availability Effect on Distribution Systems Reliability by Multilevel Monte Carlo Method

May 25 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia Australia
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Abstract: The reliability model of distribution systems is influenced by its components reliability and availability. The seminar presents the effects of distribution system components availability on reliability results in a computationally efficient way. We use a novel Multilevel Monte Carlo (MLMC) method to speed up traditional Monte Carlo (MC) method based reliability assessment. The MLMC method is implemented through solving the stochastic differential equation of components random failure process using Milstein discretisation scheme. Two selected reliability indices are evaluated using…

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June 2017

Lachlan James Gunn – Tor uses and attacks: generic antiequivocation, and geolocation of anonymous services

June 8 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia Australia
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Abstract Tor is an anonymisation network that transports traffic through a series of relays in order to hide its origin; by using several relays, each with a layer of encryption, the relay that knows the identity of the user does not know the contents or destination of their traffic, while the relay that sees the traffic has no idea of its origin. One feature of Tor is the ability to provide hidden services, which hide the locations of servers from clients, and not just the…

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Solmaz Kahourzade – Loss Analysis and Efficiency Improvement of a Tapered Axial-Flux PM Amorphous Magnetic Material Machine

June 15 @ 4:10 pm - 5:00 pm

Abstract: Amorphous magnetic materials (AMM) have been used in low frequency power transformer applications for more than two decades but not commercially utilized in high frequency rotating electrical machines due to the lack of a suitable handling method and an economical cutting technique. In this presentation, a novel brushless synchronous permanent-magnet rotating electrical machine suitable for a range of high-efficiency, high-power density and high-speed machine applications is introduced. It includes a 12-slot 10-pole tapered axial-flux permanent-magnet machine utilizing amorphous magnetic…

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