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January 2017

Witold Pedrycz – Information Granularity in Intelligent Data Analysis and Decision-Making Processes

January 18 @ 4:00 pm - 5:00 pm
Ingkarni Wardli 5.57,

Abstract Information granules play a pivotal role in acquiring, representing, processing, and communicating knowledge at a suitable level of abstraction. Designing information granules is paramount to all pursuits of Granular Computing. This presentation offers a comprehensive and systematically structured overview of methodologies and algorithms of designing information granules along with a suite of representative applications in data analysis and decision-making. The taxonomy embraces two main categories of data-driven and knowledge-oriented approaches. We introduce and discuss a principle of justifiable granularity,…

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February 2017

Tatsunosuke Matsui – Active terahertz metamaterials utilizing organic pi-conjugated materials

February 9 @ 4:00 pm - 5:00 pm
Napier G04,

Abstract:  Terahertz (THz) science and technology has been remarkably developed in recent years, however, there are still not enough optical components are available. Metamaterials are actively studied to develop novel type of optical components and devices. We are working on developing active THz metamaterials utilizing organic p-conjugated materials. In this talk, I will show our recent results on (1) efficient optical modulation of THz transmission in organic/inorganic semiconductor hybrid system, (2) active THz metamaterials utilizing pi-conjugated polymer actuators, and (3)…

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Adj. Assoc. Professor Bernd Fischer – Breaking the Diffraction Limit in the THz frequency range

February 16 @ 4:00 pm - 5:00 pm

Abstract In the past two decades, terahertz time domain spectroscopy (THz-TDS) has proven to be a very versatile method for the investigation of molecular systems and for applications contact-free inspection and quality control.  As a consequence, several commercial suppliers offer various systems for a steadily growing market. However, while the method seems more or less established for the above mentioned applications, the hopes and expectations in the technique in particular for medical applications have not been fulfilled. This is mainly…

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IEEE Distinguish Microwave Lecturer – Prof. Naoki Shinohara – Current Research and Development of Wireless Power Transfer via Radio Waves and the Application

February 27 @ 4:00 pm - 5:00 pm
Napier G04,

Abstract Theory, technologies, applications, and current R&D status of the wireless power transfer (WPT) will be presented. The talk will cover both the far-field WPT via radio waves, especially beam-type and ubiquitous-type WPT, and energy harvesting from broadcasting waves. The research of the WPT was started from the far-field WPT via radio waves, in particular the microwaves in 1960s. In recent years this became a hot topic again due to the rapid growth of wireless devices. Theory and technologies of…

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March 2017

Prof. Toshihiko Kiwa – A terahertz chemical microscope for bio-applications

March 6 @ 4:00 pm - 5:00 pm
IW B18,

Abstract Chemical sensing of the water solution with the small amount of volume is important in terms of low-invasive medical diagnosis. In our group, a terahertz chemical microscopy (TCM) based on the laser-excited terahertz technology has been proposed and developed to visualize the distribution of the antibody-antigen bindings on the silicon based sensing plate without any labels on the antibody. The sensing plate can radiate the terahertz pulses by femtosecond laser and the amplitude of the detected terahertz pulses can…

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Cuong Nguyen – Analytical modeling and optimization of electret-based microgenerators under sinusoidal excitations

March 16 @ 4:00 pm - 5:00 pm
S111, Engineering South
Adelaide, South Australia Australia
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Abstract Small scale electrostatic energy harvesters or microgenerators have attracted much interest due to their compatibility with micro-electro-mechanical-system (MEMS) fabrication processes and the possibility to energize wireless sensors and actuators through harvesting movement or vibration from surrounding environment. Several analytical models have been developed to estimate the performance of electret-based microgenerators.  However, most of these studies focused on constant-speed rotations, while in practice, mechanical stimuli resemble sinusoidal vibrations.  Consequently, a combination of finite element modeling and numerical methods has been…

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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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