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August 2017

Menghan Sun – A Fully Integrated Hybrid Power Management Unit for Passive UHF RFID

August 24 @ 4:35 pm - 5:00 pm
S112, Engineering South

Abstract This paper presents a fully integrated hybrid power management unit (HPMU) realized in the 130 nm process. The design improves the performance of RFID tags—especially those with passively powered sensors—by intelligently managing harvested power. The HPMU opportunistically takes advantage of the excess harvested power beyond the operational requirements of a tag and stores this energy externally. Through smart power routing, this stored energy is used to sustain the supply voltage of tag circuitry during brownouts, cold starts, and for…

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September 2017

Sree Pramod Pinapati – Detuning effects of Wearable Patch Antennas

September 7 @ 4:10 pm - 4:35 pm
S112, Engineering South

Abstract Wearable antennas have attracted increasing attention in both the academic and commercial sectors. Wearable antennas can find widespread deployment in sports, military and emergency applications such as for police and firefighters.  Wearable antennas do however face some unique challenges which are primarily in the form of varying environmental conditions such as bending, proximity to human body tissue and exposure to moisture. Naturally these are expected to cause some variations in the antenna performance. To compensate for these effects, wearable…

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Hassan Al-Saadi – Probabilistic Analysis of Maximum Allowable PV Connections across Bidirectional Feeders within a Distribution Network

September 7 @ 4:35 pm - 5:00 pm
S112, Engineering South

Abstract In the talk,  a probabilistic approach (PA) will be presented to quantify the impacts of PV increase connections in bidirectional feeders within a distribution network. The aim is to establish a tool that can serve distribution network operators (DNOs) in seizing the maximum allowable photovoltaic (PV) connections, and ultimately with their responsibility on providing a reliable and secured power. An uncertainty model based on clearness index is utilized to predict the actual PV power injected in to the utility…

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Syed Imranul Islam – Fuzzy functional observer and its application as fuzzy controller for nonlinear systems with time delay and model uncertainty

September 14 @ 4:10 pm - 4:35 pm

Abstract Functional observer (FO) is an important research topic for its widespread application in many industrial processes.  It has received intensive research interest over the last few decades for its ability of estimating function of states of linear systems in single step rather than doing it in two steps, i.e. estimation of states and calculation of required function of states. In addition, it inherently reduces the order of the observer. Takagi-Sugeno (T-S) fuzzy model, on the other hand, is an…

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Gabriel Haines – Wide Speed Range Sensorless Operation of Brushless Permanent-Magnet Motor Using Flux Linkage Increment

September 14 @ 4:35 pm - 5:00 pm
S112, Engineering South

Abstract: Brushless permanent-magnet (PM) machines offer high efficiency, high-power density, and low maintenance. However, they require the use of an electronic drive to synchronise the current waveforms to the rotor position. Typically, this is achieved through use of external position sensors mounted to the motor shaft. To reduce costs and increase reliability, it is desirable to eliminate these external sensors. Existing back-electromotive force (EMF) and flux linkage-based indirect rotor position detection methods have limitations, specifically poor position accuracy and inability…

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Prof. Yasuaki Monnai – Terahertz Leaky-Wave Antennas for Real World Applications

September 28 @ 4:10 pm - 5:00 pm
S112, Engineering South

Abstract We discuss the implementation and application of terahertz leaky-wave antennas (LWA). A LWA is an antenna array integrated with a waveguide. It can generate a directional beam by coherently leaking a traveling wave from a waveguide into free space. It also enables dynamic beam steering enabled by frequency sweeping. These characteristics are particularly relevant for developing a low-loss, low-profile, and wide-aperture terahertz transmission systems. As a proof of concept, we demonstrate an application of LWAs to radar imaging in…

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October 2017

Wendy SL Lee – Broadband terahertz circular-polarization beam splitter

October 5 @ 4:10 pm - 4:35 pm

Abstract Splitting circularly polarised waves is desirable for high-data rate wireless communications and study of molecular chirality at terahertz frequencies. Typically, this functionality is achieved using bulk optical systems with limitations in material availability, bandwidth and efficiency. As an alternative, we employ metasurfaces with spatially varying broadband birefringence to attain the same functionality. We demonstrate that a metasurface designed with gradually rotated birefringent resonators can deflect normally incident left handed circularly polarized (LHCP) and right handed circularly polarized (RHCP) waves…

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Peng Wang – Realizing long-term memory in cognitive architectures using resistive devices

October 5 @ 4:35 pm - 5:00 pm

Abstract Complex cognitive agents are expected to persist for a long time and acquire a large amount of knowledge in long-term memory. However, the hypothesized agent running on a von Neumann computer can generate substantial traffic across the memory hierarchy, and the sequential processing nature of von Neumann’s location-addressed computing scheme can be prohibitively inefficient and time-consuming for contextual information retrieval from a large knowledge base. An optimised hardware is needed. This research considers a flat resistive content-addressable memory as…

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Amir Parsa Anvar – An Investigation towards the Pixel Colour Statistics in Melanoma Cancer Histology Sample Images

October 19 @ 4:10 pm - 4:35 pm
S112, Engineering South

Abstract: Melanoma is a deadly form of skin cancer, attributed to the deaths of hundreds of Australians, every year. Digital Histology Images have been used by previous researchers for the diagnosis of melanoma and other cancers, by the automatic detection of mitotic cells. However, although statistical models have been developed for the colour based segmentation of the data, these works have not undertaken a careful analysis of the pixel-based statistics of the data, prior to its modelling. This talk will…

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Hang Yin – Practical Application of Collocation Method in Power Flow Study of South Australia Grid

October 19 @ 4:35 pm - 5:00 pm
S112, Engineering South

Abstract The stochastic collocation method is proposed to solve probabilistic power flow (PPF) model of South Australia (SA). And this model is based upon historical acquisition of power system data of SA. In SA, numbers of wind farms are installed and the variability of wind speed brings more uncertainties into the power system. The traditional deterministic power flow (DPF) computation does not consider the probabilistic nature of power system uncertainties, so PPF computation is imperative. However, as a commonly used…

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