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Articles 1 - 22 of 22
Full-Text Articles in Engineering
Appraising Critical Infrastructure Systems With Visualisation, Graeme Pye, Matthew Warren
Appraising Critical Infrastructure Systems With Visualisation, Graeme Pye, Matthew Warren
Australian Information Warfare and Security Conference
This paper explores the use of system modelling as an approach for appraising critical infrastructure systems. It reports on focus group findings with relation to the system modelling aspects of a critical infrastructure security analysis and modelling framework. Specifically, this discussion focuses on the interpretations of a focus group in terms of the likely benefits or otherwise of system visualisation. With the group focusing on its perceived value as an educational tool in terms of providing an abstract visualisation representation of a critical infrastructure system incident.
Cyber Influence, William Hutchinson
Cyber Influence, William Hutchinson
Australian Information Warfare and Security Conference
This paper explores influence in the cyber-world and the ability and effectiveness of influence campaigns in this medium. It examines the possibilities of influence in the online world as examines the potential of mobile technologies in this area. The contentious link between influence and behavioural change is investigated. Counterinfluence in the context of radicalisation is also looked at. Whilst it is inevitable that the digital medium is and will be used for influence campaigns and will be influential regardless if there are concerted ‘campaigns’ or not, it effects in terms of behavioural change are still open to question.
Safeguarding Australia From Cyber-Terrorism:A Proposed Cyber-Terrorism Scada Risk Framework For Industry Adoption, Christopher Beggs, Matthew Warren
Safeguarding Australia From Cyber-Terrorism:A Proposed Cyber-Terrorism Scada Risk Framework For Industry Adoption, Christopher Beggs, Matthew Warren
Australian Information Warfare and Security Conference
Terrorist groups are currently using information and communication technologies (ICTs) to orchestrate their conventional physical attacks. More recently, terrorists have been developing a new form of capability within the cyber-arena to coordinate cyber-based attacks. This paper identifies that cyber-terrorism capabilities are an integral, imperative, yet under-researched component in establishing, and enhancing cyber-terrorism risk assessment models for SCADA systems. This paper is an extension of work previously published by Beggs and Warren 2008, it presents a high level overview of a cyber-terrorism SCADA risk framework that has been adopted and validated by SCADA industry practitioners. The paper proposes a managerial framework …
Energy Security: An Australian Nuclear Power Industry, Geoff I. Swan
Energy Security: An Australian Nuclear Power Industry, Geoff I. Swan
Australian Security and Intelligence Conference
Climate change and energy security are driving a worldwide renaissance in nuclear power. An Australian nuclear power industry has also been seriously investigated by the Australian government and its agencies. This paper provides a broad overview of the nuclear fuel cycle and the nuclear power industry. It identifies aspects that are sensitive to nuclear terrorism and nuclear weapons proliferation to help security professionals identify threats and prepare for a possible Australian nuclear power industry.
Adiabatically Induced Coherent Josephson Oscillations Of Ultracold Atoms In An Asymmetric Two-Dimensional Magnetic Lattice, Ahmed Abdelrahman, Peter Hannaford, Kamal Alameh
Adiabatically Induced Coherent Josephson Oscillations Of Ultracold Atoms In An Asymmetric Two-Dimensional Magnetic Lattice, Ahmed Abdelrahman, Peter Hannaford, Kamal Alameh
Research outputs pre 2011
We propose a new method to create an asymmetric two-dimensional magnetic lattice which exhibits magnetic band gap structure similar to semiconductor devices. The quantum device is assumed to host bound states of collective excitations formed in a magnetically trapped quantum degenerate gas of ultracold atoms such as a Bose-Einstein condensate (BEC) or a degenerate Fermi gas. A theoretical framework is established to describe possible realization of the exciton-Mott to discharging Josephson states oscillations in which the adiabatically controlled oscillations induce ac and dc Josephson atomic currents where this effect can be used to transfer n Josephson qubits across the asymmetric …
Firearm Forensics Based On Ballistics Cartridge Case Image Segmentation Using Colour Invariants, Dongguang Li
Firearm Forensics Based On Ballistics Cartridge Case Image Segmentation Using Colour Invariants, Dongguang Li
Australian Security and Intelligence Conference
Ballistics firearm identification based on image processing is of paramount importance in criminal investigation. The efficiency of traditional ballistics imaging system is heavily dependent upon the expertise and experience of end-user. An intelligent ballistics imaging system is highly demanded to address this issues. The segmentation of cartridge case object from the original image is a key step to subsequent process. It is very difficult to segment cartridge case from the original image using traditional threshold based methods due to the shadows or unlimited environments to acquire image. In this paper, we proposed a novel approach based upon the colour invariant …
Opto-Vlsi-Based Photonic True-Time Delay Architecture For Broadband Adaptive Nulling In Phased Array Antennas, Budi Juswardy, Feng Xiao, Kamal Alameh
Opto-Vlsi-Based Photonic True-Time Delay Architecture For Broadband Adaptive Nulling In Phased Array Antennas, Budi Juswardy, Feng Xiao, Kamal Alameh
Research outputs pre 2011
This paper proposes a novel Opto-VLSI-based tunable true-time delay generation unit for adaptively steering the nulls of microwave phased array antennas. Arbitrary single or multiple true-time delays can simultaneously be synthesized for each antenna element by slicing an RFmodulated broadband optical source and routing specific sliced wavebands through an Opto-VLSI processor to a high-dispersion fiber. Experimental results are presented, which demonstrate the principle of the true-time delay unit through the generation of 5 arbitrary true-time delays of up to 2.5 ns each.
Opto-Vlsi-Based Broadband True-Time Delay Generation For Phased Array Beamforming, Budi Juswardy, Feng Xiao, Kamal Alameh
Opto-Vlsi-Based Broadband True-Time Delay Generation For Phased Array Beamforming, Budi Juswardy, Feng Xiao, Kamal Alameh
Research outputs pre 2011
Electronically controlled phased-array antennas can adaptively scan radiated beams in three-dimensional space without mechanically moving parts. While most of the research on phased-array antennas has been focusing on broadband beam steering less attention has been devoted to null steering. Broadband null steering requires a beamformer that can generate variable and frequency independent true time-delays (TTD). In this paper we propose and demonstrate the concept of an Opto-VLSI-based tunable true-time delay generation unit for adaptive null steering in phased array antennas, where arbitrary single or multiple true-time delays can simultaneously be synthesized. Simulated azimuth gain patterns for a 4- element antenna …
Opto-Vlsi-Based Tunable Single-Mode Fiber Laser, Feng Xiao, Kamal Alameh, Yong-Tak Lee
Opto-Vlsi-Based Tunable Single-Mode Fiber Laser, Feng Xiao, Kamal Alameh, Yong-Tak Lee
Research outputs pre 2011
A new tunable fiber ring laser structure employing an Opto-VLSI processor and an erbium-doped fiber amplifier (EDFA) is reported. The Opto-VLSI processor is able to dynamically select and couple a waveband from the gain spectrum of the EDFA into a fiber ring, leading to a narrow-linewidth high-quality tunable laser output. Experimental results demonstrate a tunable fiber laser of linewidth 0.05 nm and centre wavelength tuned over the C-band with a 0.05nm step. The measured side mode suppression ratio (SMSR) is greater than 35 dB and the laser output power uniformity is better than 0.25 dB. The laser output is very …
Novel Colour Selection Scheme For 2d Barcode, Hiroko Kato, Keng T. Tan, Douglas Chai
Novel Colour Selection Scheme For 2d Barcode, Hiroko Kato, Keng T. Tan, Douglas Chai
Research outputs pre 2011
The use of colours in 2D barcodes is challenging. This is even more so in barcodes for mobile devices. Although 2D barcodes are fast becoming the ubiquitous tool for mobile computing, most implementations considered monochromatic 2D barcodes. A few colour 2D barcodes are emerging but these implementations only utilises a limited number of colours. In this paper, we present the challenges faced by the use of colours in 2D barcodes for mobile devices. We also introduce a novel colour selection scheme for 2D barcode, which is implemented in our novel colour 2D barcode - the MMCCTM. Our novel selection scheme …
An Analysis Of Silver Candlesticks From A Casting Point Of View: Originals, Copies, Forgeries, Jaromir Audy, Emil Evin
An Analysis Of Silver Candlesticks From A Casting Point Of View: Originals, Copies, Forgeries, Jaromir Audy, Emil Evin
Research outputs pre 2011
Collecting silver artefacts has traditionally been a very popular hobby. Silver is addictive, therefore the number of potential collectors and investors appears to grow each year. Unfortunately, increases in the interest and buying potentials resulted in a number of forgeries manufactured and introduced to the open antique market. The items such as early silver candlesticks dictate a very high price, for many high quality fakes show very good appearances and matching similarities with originals. Such copies are traditionally manufactured by casting using the original items as patterns. Small details and variances in design features, position and shape of hallmarks, including …
Performance Of Mobile Camera On Colour 2d Barcode, Siong K. Ong, Douglas Chai, Keng T. Tan
Performance Of Mobile Camera On Colour 2d Barcode, Siong K. Ong, Douglas Chai, Keng T. Tan
Research outputs pre 2011
In recent years, colour 2D barcodes have emerged to increase the data capacity of the 2D barcode. Similarly, camera-equipped mobile phones have became more popular and their camera could act as an input device for a barcode decoder. In this paper, three Windows Mobile (WM) operated mobile phones are used to test their camera performance in reading the colour 2D barcodes. From the results, recommendations are put forward to those who are developing colour 2D barcode reader for mobile phones.
Rf-Sputtered Bi-Substituted Iron Garnet Composite Films For Visible-Range Magnetooptics, Mohammad Alam, Mikhail Vasiliev, Kamal Alameh, V. A. Kotov
Rf-Sputtered Bi-Substituted Iron Garnet Composite Films For Visible-Range Magnetooptics, Mohammad Alam, Mikhail Vasiliev, Kamal Alameh, V. A. Kotov
Research outputs pre 2011
We report on the synthesis of new magneto-optical materials with excellent optical and magneto-optical properties for visible-range and near-infrared applications. Bi-substituted composite garnet films fabricated with excess bismuth oxidecontent using RF co-sputtering and oven-annealing processes have been found to possess simultaneously record MO quality and uniaxial magnetic anisotropy.
Opto-Vlsi-Based Reconfigurable Photonic Rf Filter, Feng Xiao, Mingya Shen, Budi Juswardy, Kamal Alameh
Opto-Vlsi-Based Reconfigurable Photonic Rf Filter, Feng Xiao, Mingya Shen, Budi Juswardy, Kamal Alameh
Research outputs pre 2011
Radio frequency (RF) signal processors based on photonics have several advantages, such as broadband capability, immunity to electromagnetic interference, flexibility, and light weight in comparison to all-electronics RF filters. It still requires innovative research and development to achieve high-resolution reconfigurable photonic RF signal processors featuring high selectivity, resolution, wide tunability, and fast reconfigurability. In this paper, we propose and experimentally demonstrate the concept of a reconfigurable photonic RF filter structure integrating an Amplified Spontaneous Emission (ASE) source, an Opto-VLSI processor that generates arbitrary phase-only steering and multicasting holograms for wavelength selection and attenuation, arrayed waveguide gratings (AWGs) for waveband multiplexing …
Multipartite Entanglement In A Discrete Magnetic Bands Magnetic Lattice, Ahmed Abdelrahman, Peter Hannaford, Mikhail Vasiliev, Kamal Alameh
Multipartite Entanglement In A Discrete Magnetic Bands Magnetic Lattice, Ahmed Abdelrahman, Peter Hannaford, Mikhail Vasiliev, Kamal Alameh
Research outputs pre 2011
An asymmetric multi-quantum state magnetic lattice is proposed to host entangled system formed by using Bose Einstein Condensate. Discrete magnetic bands magnetic lattice is devised to locate a controllable long-range entanglement of a many qubits well separated in space. Confinement of the system may improve the condition for long-range entanglement.
Distributed Optical Fibre Smart Sensors For Structural Health Monitoring: A Smart Transducer Interface Module, Graham Wild, Steven Hinckley
Distributed Optical Fibre Smart Sensors For Structural Health Monitoring: A Smart Transducer Interface Module, Graham Wild, Steven Hinckley
Research outputs pre 2011
In this paper, we present a smart transducer interface module (STIM) for distributed optical fibre smart sensors. The STIM is a general purpose interface that has been designed to be used with intensiometric optical fibre sensors. The interface is made up of 2 optical fibre PIN receivers, a differential amplifier and a digital signal processor. The two received signals are differentially amplified to increase sensitivity and the signal-to-noise ratio. A DSP evaluation board is used as the intelligence of the STIM, which has onboard ADC. The STIM was successfully used as an embedded system monitoring both temperature and strain, and …
Tunable Photonic Microwave Filters Based On Opto-Vlsi Processors, Feng Xiao, Budi Juswardy, Kamal Alameh
Tunable Photonic Microwave Filters Based On Opto-Vlsi Processors, Feng Xiao, Budi Juswardy, Kamal Alameh
Research outputs pre 2011
A tunable photonic microwave filter structure utilizing an opto-very-large scale integration (opto-VLSI) processor is proposed and experimentally demonstrated. The opto-VLSI processor slices a radio-frequency (RF)-modulated wideband light source into wavebands of arbitrary weights and incremental delay times to realize a tunable RF filter response. Experimental results demonstrate a tunable microwave filter that can simply be reconfigured with high flexibility via a software-driven opto-VLSI processor. Theoretical simulations are in good agreement with the experimental results.
Tunable Multi-Wavelength Fiber Lasers Based On An Opto-Vlsi Processor And Optical Amplifiers, Feng Xiao, Kamal Alameh, Yong Lee
Tunable Multi-Wavelength Fiber Lasers Based On An Opto-Vlsi Processor And Optical Amplifiers, Feng Xiao, Kamal Alameh, Yong Lee
Research outputs pre 2011
A multi-wavelength tunable fiber laser based on the use of an Opto-VLSI processor in conjunction with different optical amplifiers is proposed and experimentally demonstrated. The Opto-VLSI processor can simultaneously select any part of the gain spectrum from each optical amplifier into its associated fiber ring, leading to a multiport tunable fiber laser source. We experimentally demonstrate a 3-port tunable fiber laser source, where each output wavelength of each port can independently be tuned within the C-band with a wavelength step of about 0.05nm. Experimental results demonstrate a laser linewidth as narrow as 0.05 nm and an optical side-mode-suppression-ratio (SMSR) of …
Photonic True-Time Delay Unit For Broadband Adaptive Nulling In Antenna Arrays, Budi Juswardy, Feng Xiao, Kamal Alameh
Photonic True-Time Delay Unit For Broadband Adaptive Nulling In Antenna Arrays, Budi Juswardy, Feng Xiao, Kamal Alameh
Research outputs pre 2011
This paper describes an opto-VLSI-based tunable true-time delay generation unit used for adaptive null steering in phased array antennas. Arbitrary single or multiple true-time delays can simultaneously be synthesized for each antenna element to generate multiple broadband nulls. Simulated azimuth gain patterns for a 4-elements antenna arrays are presented. Experimental results, which demonstrate the principle of the true-time delay unit are also presented.
An Opto-Vlsi-Based Reconfigurable Optical Add-Drop Multiplexer Employing An Off-Axis 4-F Imaging System, Mingya Shen, Feng Xiao, Selam Ahderom, Kamal Alameh
An Opto-Vlsi-Based Reconfigurable Optical Add-Drop Multiplexer Employing An Off-Axis 4-F Imaging System, Mingya Shen, Feng Xiao, Selam Ahderom, Kamal Alameh
Research outputs pre 2011
A novel reconfigurable optical add-drop multiplexer (ROADM) structure is proposed and demonstrated experimentally. The ROADM structure employs two arrayed waveguide gratings (AWGs), an array of optical fiber pairs, an array of 4-f imaging microlenses that are offset in relation to the axis of symmetry of the fiber pairs, and a reconfigurable Opto-VLSI processor that switches various wavelength channels between the fiber pairs to achieve add or drop multiplexing. Experimental results are shown, which demonstrate the principle of add/drop multiplexing with crosstalk of less than -27dB and insertion loss of less than 8dB over the Cband for drop and through operation …
A Novel Reconfigurable Optical Interconnect Architecture Using An Opto-Vlsi Processor And A 4-F Imaging System, Mingya Shen, Feng Xiao, Kamal Alameh
A Novel Reconfigurable Optical Interconnect Architecture Using An Opto-Vlsi Processor And A 4-F Imaging System, Mingya Shen, Feng Xiao, Kamal Alameh
Research outputs pre 2011
A novel reconfigurable optical interconnect architecture for on-board high-speed data transmission is proposed and experimentally demonstrated. The interconnect architecture is based on the use of an Opto-VLSI processor in conjunction with a 4-f imaging system to achieve reconfigurable chip-to-chip or board-to-board data communications. By reconfiguring the phase hologram of an Opto-VLSI processor, optical data generated by a vertical Cavity Surface Emitting Laser (VCSEL) associated to a chip (or a board) is arbitrarily steered to the photodetector associated to another chip (or another board). Experimental results show that the optical interconnect losses range from 5.8dB to 9.6dB, and that the maximum …
Rf Magnetron Sputtered (Bidy)3(Fega)5o12:Bi2o3 Composite Garnet-Oxide Materials Possessing Record Magneto-Optic Quality In The Visible Spectral Region, Mikhail Vasiliev, Mohammad Alam, V.A. Kotov, Kamal Alameh, V.I. Belotelov, V.I. Burkov, A.K. Zvezdin
Rf Magnetron Sputtered (Bidy)3(Fega)5o12:Bi2o3 Composite Garnet-Oxide Materials Possessing Record Magneto-Optic Quality In The Visible Spectral Region, Mikhail Vasiliev, Mohammad Alam, V.A. Kotov, Kamal Alameh, V.I. Belotelov, V.I. Burkov, A.K. Zvezdin
Research outputs pre 2011
Bismuth-substituted iron garnets are considered to be the most promising magneto-optical materials because of their excellent optical transparency and very high magneto-optical figures of merit in the near-infrared spectral region. However, the practical application of garnets in the visible and short-wavelength infrared parts of spectrum is currently limited, due to their very high optical absorption (especially in sputtered films) in these spectral regions. In this paper, we identify the likely source of excess absorption observed in sputtered garnet films in comparison with epitaxial layers and demonstrate (Bi,Dy)(3)(Fe,Ga)(5)O(12): Bi(2)O(3) composites possessing record MO quality in the visible region.