Social and Behavioral Sciences Commons^™

Distortion Behavior Of A Heavy Hydro Turbine Blade Casting During Forced Air Cooling In Normalizing Treatment Process, Hailiang Yu, Jinwu Kang, T J. Wang, J A. Ma, Y Y. Hu, Tianyou Huang, S B. Wang, Y Wu, C C. Zhang, Yan-Tao Dai, P Li

Faculty of Engineering and Information Sciences - Papers: Part A

Distortion behavior of blade castings in heat treatment process determines their geometrical accuracy, and improper control of it may result in additional repair, shape righting, or even rejection. This article presents a novel approach for discovering the distortion behavior of heavy blade castings during heat treatment process in production. Real-time measurements of distortion and temperature field of a heavy hydro turbine blade casting weighted 17 ton during forced air cooling in normalizing treatment process were carried out by using deformation measurement instruments and an infrared thermal imaging camera. The distortion processes of the typical locations of blade and the temperature …

Double Space-Time Transmit Diversity For Very High Data Rate Mb-Ofdm Uwb Systems, Ngoc P. Le, Le C. Tran, Farzad Safaei

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, we investigate a multiband-orthogonal frequency division multiplexing ultra-wideband (MB-OFDM UWB) system with very high data rates (VHDR) of several gigabits per second (Gbps). We propose a DSTTD-based VHDR MB-OFDM UWB system by incorporating a double space-time transmit diversity (DSTTD) scheme into the conventional MB-OFDM UWB system. At the receiver, an efficient soft-demapper that takes into consideration the noise enhancement due to a zero-forcing equalization is developed. Numerical simulations of the proposed system at a very high data rate of 2.Gbps over the IEEE 802.15.3a channel models are implemented. The simulation results show that this system could achieve …

Order-4 Orthogonal Cooperative Communication In Space-Time-Frequency Coded Mb-Ofdm Uwb, Zixuan Lin, Le C. Tran, Farzad Safaei

Faculty of Engineering and Information Sciences - Papers: Part A

The combination of cooperative communication and Space-Time-Frequency-Codes (STFCs) has been recently proposed in the literature for Multiband OFDM Ultra-Wideband (MB-OFDM UWB) to improve the bit error performance, system capacity, data rate and wireless communications range. This paper proposes a cooperative communication design using Order-4 Orthogonal STFCs in MB-OFDM UWB systems, which is referred to as Order-4 Orthogonal Cooperative Communication Scheme (4-OCCS). It will be shown that 4-OCCS improves significantly the diversity and error performance of the MB-OFDM UWB system, compared to the conventional MB-OFDM UWB (without STFCs) as well as our Order-2 Orthogonal Cooperative Communication Scheme using Alamouti STFCs (2-OCCS) …

The Work Pattern Of Personal Care Workers In Two Australian Nursing Homes: A Time-Motion Study, Siyu Qian, Ping Yu, Zhen-Yu Zhang, David M. Hailey, Pamela J. Davy, Mark Nelson

Faculty of Engineering and Information Sciences - Papers: Part A

Background: The aim of the study is to describe the work pattern of personal care workers (PCWs) in nursing homes. This knowledge is important for staff performance appraisal, task allocation and scheduling. It will also support funding allocation based on activities.

Methods: A time-motion study was conducted in 2010 at two Australian nursing homes. The observation at Site 1 was between the hours of 7:00 and 14:00 or 15:00 for 14 days. One PCW was observed on each day. The observation at Site 2 was from 10:00 to 17:00 for 16 days. One PCW working on a morning shift and …

Social Implications Of Technology: The Past, The Present, And The Future, Karl Stephan, Katina Michael, M. G. Michael, Laura Jacob, Emily Anesta

Faculty of Engineering and Information Sciences - Papers: Part A

The social implications of a wide variety of technologies are the subject matter of the IEEE Society on Social Implications of Technology (SSIT). This paper reviews the SSIT’s contributions since the Society’s founding in 1982, and surveys the outlook for certain key technologies that may have significant social impacts in the future. Military and security technologies, always of significant interest to SSIT, may become more autonomous with less human intervention, and this may have both good and bad consequences. We examine some current trends such as mobile, wearable, and pervasive computing, and find both dangers and opportunities in these trends. …

Horadam Functions And Powers Of Irrationals, Martin W. Bunder

Faculty of Engineering and Information Sciences - Papers: Part A

This paper generalizes a result of Gerdemann to show (with slight variations in some special cases) that, for any real number m and Horadam function Hn(A, B, P,Q), mHn(A, B, P, Q) = i=h k∑(t,Hn+i(A, B, P, Q)), for two consecutive values of n, if and only if, m= i=h k∑ (tiai)= i=h k∑ (t ibi) where a =(P+(P2-4Q) 1/2)/2 and b = (P-(P2-4Q) 1/2)/2. (Horadam functions are defined by: H 0(A, B, P, Q) = A, H1(A,B,P,Q) = B, Hn+1(A, B, P,Q) = PHn(A,B, P,Q)-QHn-1(A, B, P,Q).) Further generalizations to the solutions of arbitrary linear recurrence relations are also …

Induction Motors Subject To Regular Voltage Fluctuations: Stator And Rotor Current Analysis From A Heating Perspective, Kun Zhao, Philip Ciufo, Sarath Perera

Faculty of Engineering and Information Sciences - Papers: Part A

Induction motors are widely applied in industry. Their performance strongly depends on relative power supply quality, such as voltage sags, harmonics, voltage unbalance and voltage fluctuations. This paper investigates the impact of voltage fluctuations on induction motor performance, particularly the stator and rotor current variation characteristics. An induction motor steady state analysis method is proposed when the motor is subjected to regular voltage fluctuations. The dynamic model of an induction motor is used in order to represent the induction motor instantaneous response. Furthermore, the correlative simulation and experiment work are presented in order to illustrate the impact of voltage fluctuations. …

(Strong) Multi-Designated Verifiers Signatures Secure Against Rogue Key Attack, Yunmei Zhang, Man Ho Allen Au, Guomin Yang, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part A

Designated verifier signatures (DVS) allow a signer to create a signature whose validity can only be verified by a specific entity chosen by the signer. In addition, the chosen entity, known as the designated verifier, cannot convince any body that the signature is created by the signer. Multi-designated verifiers signatures (MDVS) are a natural extension of DVS in which the signer can choose multiple designated verifiers. DVS and MDVS are useful primitives in electronic voting and contract signing. In this paper, we investigate various aspects of MDVS and make two contributions. Firstly, we revisit the notion of unforgeability under rogue …

Understanding The Role Of Moisture In The Self-Heating Process Of Compost Piles, Thiansiri Luangwilai, Harvinder S. Sidhu, Mark I. Nelson

Faculty of Engineering and Information Sciences - Papers: Part A

This paper considers the self-heating process which occurs in a compost pile using one-dimensional spatially-dependent models and incorporating terms that account for self-heating due to both biological and oxidation mechanisms. As the moisture content in a compost pile is a crucial factor in its degradation process, we utilise a model which incorporates four mass-balance equations, namely, energy, oxygen, vapour and liquid water concentrations, to investigate the behaviour of compost piles when moisture content is present. Analyses of different initial water contents within a compost pile, different ambient relative humidities and different amounts of water added to the pile by rainstorms …

Computer Aided Decision Support System For Cervical Cancer Classification, - Rahmadwati, Golshah Naghdy, Montserrat B. Ros, Catherine Todd

Faculty of Engineering and Information Sciences - Papers: Part A

Conventional analysis of a cervical histology image, such a pap smear or a biopsy sample, is performed by an expert pathologist manually. This involves inspecting the sample for cellular level abnormalities and determining the spread of the abnormalities. Cancer is graded based on the spread of the abnormal cells. This is a tedious, subjective and timeconsuming process with considerable variations in diagnosis between the experts. This paper presents a computer aided decision support system (CADSS) tool to help the pathologists in their examination of the cervical cancer biopsies. The main aim of the proposed CADSS system is to identify abnormalities …

Improved Base-Calling And Quality Scores For 454 Sequencing Based On A Hurdle Poisson Model, Kristof De Beuf, Joachim De Schrijver, Olivier Thas, Wim Van Criekinge, Rafael A. Irizarry, Lieven Clement

Faculty of Engineering and Information Sciences - Papers: Part A

Background: 454 pyrosequencing is a commonly used massively parallel DNA sequencing technology with a wide variety of application fields such as epigenetics, metagenomics and transcriptomics. A well-known problem of this platform is its sensitivity to base-calling insertion and deletion errors, particularly in the presence of long homopolymers. In addition, the base-call quality scores are not informative with respect to whether an insertion or a deletion error is more likely. Surprisingly, not much effort has been devoted to the development of improved base-calling methods and more intuitive quality scores for this platform.

Thermodynamic Assessment Of Aluminium Production Through Carbosulphidation Route, Nazmul Huda, Muhammad A. Rhamdhani, M A. Dewan, Geoffrey A. Brooks, B J. Monaghan, L Prentice

Faculty of Engineering and Information Sciences - Papers: Part A

Indirect carbothermal reduction of alumina for the production of aluminium has been claimed to be better compared to the existing Hall-Heroult process in-terms of energy usage, generation of perfluorocarbons and overall greenhouse gas emission. In the process, alumina is reduced to an intermediate compound which is then further reduced to Al. It has been shown from the previous thermodynamic study by the authors that high conversion of alumina can be obtained if it is reduced to Al-chloride, Al-nitride or Al-sulphide. This paper deals with detailed systematic thermodynamic analysis of the process through carbosulphidation route, where alumina is first reduced to …

An Mas-Based Implementation For Semantic Web Services Composition, Jun Shen, Ghassan Beydoun, Graham Low

Faculty of Engineering and Information Sciences - Papers: Part A

Many information system developers face high cost in adopting service-oriented architectures because of the high cost of locating appropriate services to customise and integrate into their system. This chapter aims at reducing this cost by automating much of the composition and service selection effort. It illustrates the use of a peer-to-peer multi-agent system (MAS) to facilitate service selection with multiple quality of service properties. The system will use semantic enrichment of services in order to facilitate their identification and composition. With semantic-driven composition, services can be shared between teams of developers and across multiple organisations connected via the Internet. In …

Importance Of The Relative Advantage Of Rfid As Enabler Of Asset Management In The Healthcare: Results From A Delphi Study, Samuel Fosso Wamba, Eric W. T Ngai

Faculty of Engineering and Information Sciences - Papers: Part A

Compared with bar coding technology, what is the importance of the relative advantage of radio frequency identification (RFID) in the healthcare sector? What is the effect of RFID technology on asset management-related processes in healthcare? What are the top-ranked asset management-related processes associated with the adoption and use of RFID technology in this sector? To answer these questions, a three-round Delphi study was conducted among experts working on RFID technology. In the study, a list of 12 processes related to the relative advantage of RFID and 10 processes related to RFID-enabled asset management applications in the healthcare sector were derived …

On The Dosimetric Effect And Reduction Of Inverse Consistency And Transitivity Errors In Deformable Image Registration For Dose Accumulation, Edward T. Bender, Nicholas Hardcastle, Wolfgang A. Tome

Faculty of Engineering and Information Sciences - Papers: Part A

Purpose: Deformable image registration (DIR) is necessary for accurate dose accumulation between multiple radiotherapy image sets. DIR algorithms can suffer from inverse and transitivity inconsistencies. When using deformation vector fields (DVFs) that exhibit inverse-inconsistency and are nontransitive, dose accumulation on a given image set via different image pathways will lead to different accumulated doses. The purpose of this study was to investigate the dosimetric effect of and propose a postprocessing solution to reduce inverse consistency and transitivity errors. Methods: Four MVCT images and four phases of a lung 4DCT, each with an associated calculated dose, were selected for analysis. DVFs …

Performance Analysis Of Stfc Mb-Ofdm Uwb In Wban Channels, Miftadi Sudjai, Le Chung Tran, Farzad Safaei

Faculty of Engineering and Information Sciences - Papers: Part A

This paper investigates the performance of the space-time-frequency coded (STFC) multiband orthogonal frequency division multiplexing ultra-wideband (MBOFDM UWB) system over wireless body area network (WBAN) channels, using the Alamouti code. Different MIMO configurations and different modulations are used for comparison. The effect of body directions is also assessed by simulation in this paper. Simulation results show that the proposed STFC MB-OFDM UWB system provides a significantly better BER performance, compared to the conventional MB-OFDM system, even from a reasonably low Eb/No range. The simulations also confirm that the body direction affects the system performance significantly due to the availability of …

The Algorithm Of Equal Acceptance Region For Detecting Copy Number Alterations: Applications To Next-Generation Sequencing Data, Yan-Xia Lin

Faculty of Engineering and Information Sciences - Papers: Part A

The information of copy number alterations (gains and losses) in tumour genomes can be used to discovery cancer-causing genes. The estimate of copy number can be obtained from the estimate copy number ratio. The higher the depth of underlying sequencing data, the more accurate the estimate of copy number ratio. At the same time, the higher depth of a sequencing data used in copy number analysis, the more cost of data analysis. To develop a method for identifying a necessary depth of sequencing data for copy number analysis before test data are produced is of interest. In this paper, we …

Scene Segmentation And Pedestrian Classification From 3-D Range And Intensity Images, Xue Wei, Son Lam Phung, Abdesselam Bouzerdoum

Faculty of Engineering and Information Sciences - Papers: Part A

This paper proposes a new approach to classify obstacles using a time-of-flight camera, for applications in assistive navigation of the visually impaired. Combining range and intensity images enables fast and accurate object segmentation, and provides useful navigation cues such as distances to the nearby obstacles and obstacle types. In the proposed approach, a 3-D range image is first segmented using histogram thresholding and mean-shift grouping. Then Fourier and GIST descriptors are applied on each segmented object to extract shape and texture features. Finally, support vector machines are used to recognize the obstacles. This paper focuses on classifying pedestrian and non-pedestrian …

It Consultants' Voluntary Contract Termination - A Psychological Contract Perspective, Gro Bjerknes, Karlheinz Kautz

Faculty of Engineering and Information Sciences - Papers: Part A

This research explores the question why IT consultants terminate their employment contracts in a labour market with job drought, downsizing and salary cuts when they were among those who kept their jobs during layoffs. A process model for the maintenance of a psychological contract between employees and employers is presented, which combines the concept of psychological contract with a theory of the relation between intrinsic motivation and management practices and with theories of identity, self-esteem, influence and power. The research verifies and specifies the model based on a revelatory case study. The model helps explaining IT consultants' behavior of voluntarily …

Information Systems Development Projects As Complex Adaptive Systems, Karlheinz Kautz

Faculty of Engineering and Information Sciences - Papers: Part A

This research considers information systems development (ISD) projects as complex adaptive systems. We investigate the question whether complex adaptive systems (CAS) theory is relevant as a theoretical foundation for understanding ISD, and if so, which kind of understanding can be achieved by utilizing the theory? We introduce key concepts of CAS theory such as interaction, emergence, interconnected autonomous agents, selforganization, co-evolution, poise at the edge of chaos, time pacing, and poise at the edge of time to analyse and understand ISD in practice. We demonstrate the strength of such a CAS approach through an empirical case study presentation and analysis. …

Improved Initial Class Diagrams With Atsa:Oo, Robert B. K Brown, Angela Piper

Faculty of Engineering and Information Sciences - Papers: Part A

Despite the popularity of Object Oriented programming and design, their analysis phase is difficult to learn and relies heavily on the analyst's intuition and experience. Even industry practitioners can produce initial class diagrams requiring time-consuming refinements in the design phase. Business clients can find it difficult to follow its diverse techniques and constructs. The A TSA method offers analysis under a single theoretical framework that is specifically designed to be easily understood by both neophyte practitioners and business clients. However as it follows the procedural paradigm, it is not suitable for direct 00 application. This paper presents an adaptation of …

Voltage Security Constrained Reactive Power Optimization Incorporating Wind Generation, L G. Meegahapola, E Vittal, A Keane, D Flynn

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents a comparative analysis between conventional optimal power flow (OPF) and voltage constrained OPF strategies with wind generation. The study has been performed using the New England 39 bus system with 12 doublyfed induction generator (DFIG) based wind farms installed across the network. A voltage security assessment is carried out to determine the critical wind farms for voltage stability enhancement. The power losses and individual wind farm reactive power generation have been compared with and without voltage stability constraints imposed on the OPF simulation. It is shown that voltage constrained OPF leads to much greater active power losses …

Studying The Impact Of The Corner Propagation Model On Vanet Routing In Urban Environments, Abhinay Mukunthan, Craig Cooper, Farzad Safaei, D. Franklin, Mehran Abolhasan

Faculty of Engineering and Information Sciences - Papers: Part A

Accurate modelling of the radio channel is often the most difficult aspect of a Vehicular Ad Hoc Network (VANET) simulation due to the large variability present in vehicular terrain. CORNER is a propagation model that calculates path-loss in an urban terrain with a large concentration of buildings, based on the position of the transmitter and receiver on a street map. This paper proposes additions to the CORNER propagation model to take selective multi-path fading into account and investigates the performance of the GPSR routing protocol under the CORNER propagation model in a realistic city environment.

Indian Millennials: Are Microchip Implants A More Secure Technology For Identification And Access Control?, Christine Perakslis, Katina Michael

Faculty of Engineering and Information Sciences - Papers: Part A

This mixed methods study with a sequential explanatory strategy explored qualitatively the statistically significant quantitative findings relative to Indian respondents' perceptions about RFID (radio frequency identification) transponders implanted into the human body. In the first analysis phase of the study, there was a significant chi-square analysis reported (χ2 = 56.64, df = 3, p =.000) relative to the perception of small business owners (N = 453) that implanted chips are a more secure form of identification and/or access control in organizations and the respondents' country of residence. Countries under study included Australia, India, the UK and US. The country contributing …

Characteristics Of Power Quality Disturbance Levels In Australia, Sean Elphick, Vic Smith, Vic Gosbell, Robert Barr

Faculty of Engineering and Information Sciences - Papers: Part A

The Australian Long Term Power Quality Survey (LTNPQS) now covers 2,000 sites with a range of different characteristics including strength (related to fault level), line construction and dominant load type. This paper details the latest outcomes of the LTNPQS project in terms of both disturbance levels and reporting methods. A comparison of the differences between voltage, unbalance and harmonic THD levels at strong (close to transformer) and weak (towards the end of LV feeders) sites has been performed and significant differences have been found. A multivariable linear regression study has been undertaken in order to investigate the correlation between site …

Sax-Based Decomposition Of Non-Stationary Power Quality Waveforms, M J. Afroni, Darmawan Sutanto, D Stirling

Faculty of Engineering and Information Sciences - Papers: Part A

The Hilbert Huang Transform (HHT) is a powerful tool for Power Quality (PQ) classifications. One of the main advantages of the HHT is its ability to analyze non-stationary complex waveforms with very good time resolution. However, like other waveform classification techniques, it has difficulty in resolving the instant of sudden changes in the waveform. To overcome the above problems, SAX (Symbolic Aggregate ApproXimation) method is proposed to convert the signal into symbols which facilitates a pattern detector algorithm to identify the border of the stationary signals within a non-stationary signal. Results from simulations will be provided and discussed. © 2012 …

Towards Modelling Real Time Constraints, Amir Ashamalla, Ghassan Beydoun, Graham Low, Jun Yan

Faculty of Engineering and Information Sciences - Papers: Part A

Software agents are highly autonomous, situated and interactive software components. They autonomously sense their environment and respond accordingly. Agents behaviours are often constrained by by real time constraints such as the time in which the agent is expected to respond .i.e. time needed for a task to complete. Failing to meet such a constraint can result in a task being not achieved. This possibly causes an agent or a system to fail, depending on how critical the task is to the agent or system as a whole. Our research aims at identifying and modelling real time constraints in the early …

Sharing Government-Owned Data With The Public: A Cross-Country Analysis Of Open Data Practice In The Middle East, Jazem Mutared Alanazi, Akemi Chatfield

Faculty of Engineering and Information Sciences - Papers: Part A

Since 2009, open government policies, open data, and social media use in government have been actively promoted by democratic governments around the world to promote the goals of government transparency, citizen engagement, and collaboration. To date, however, there is a lack of empirical research into open government practice. This knowledge gap has managerial and public policy implications for democratic governments and, importantly, for the governments in the Middle East in which explosive growth has occurred in the number of users of the Internet and social media. This research attempts to reduce this gap by examining the maturity level in open …

The Use Of Transient State Estimation For Voltage Dip/Sag Assessment, A Farzanehrafat, N R. Watson, S Perera

Faculty of Engineering and Information Sciences - Papers: Part A

Voltage sags are common events on the electric power network caused by network faults and the large load connections. This power quality issue can affect a wide range of electrical equipment malfunctions, interruptions or losses and are of particular concern to industry. A complete knowledge of the source is a prerequisite before any remedial action is taken. On the other hand, it is not feasible to fully monitor voltage sags occurred throughout the network. For this reason state estimation techniques have been extended into power quality issues and called Power Quality State Estimation (PQSE). This paper, introduces the use of …

Finite Element Analysis Of Debonding Failures In Cfrp-Strengthened Rectangular Steel Tubes Subjected To An End Bearing Load, D Fernando, T Yu, J G. Teng

Faculty of Engineering and Information Sciences - Papers: Part A

The end bearing capacity of a rectangular steel tube can be substantially increased through local strengthening by bonding carbon fiber reinforced polymer (CFRP) plates to the webs of the steel tube. Existing studies have revealed that failure of such a strengthened tube generally occurs by debonding of the CFRP plates from the steel tube and the effectiveness of this strengthening method depends significantly on the properties of the adhesive. This paper presents a finite element (FE) study on debonding failures in such CFRP-strengthened rectangular steel tubes subjected to an end bearing load. In the proposed FE model, a bond-slip model …