Social and Behavioral Sciences Commons^™

Ethics And Brain Implants In The Military [Commentary], Marcus R. Wigan

Faculty of Engineering and Information Sciences - Papers: Part B

Definitions are a key factor when discussing the ethics of brain implants in the military. There is a world of difference between a permanent embedded rewritable chip and an active RFID-managed interface to a nervous system.

Thermal Characterization Of Lauric Acid And Stearic Acid Binary Eutectic Mixture In Latent Heat Thermal Storage Systems With Tube And Fins, Lei Ding, Lixiong Wang, Georgios Kokogiannakis, Yajun Lu, Weibing Zhou

Faculty of Engineering and Information Sciences - Papers: Part B

In order to obtain the suitable phase change material (PCM) with low phase change temperature and improve its heat transfer rate, experimental investigation was conducted. Firstly, different mass ratios of lauric acid (LA) and stearic acid(SA) eutectic mixtures were prepared and characterized by differential scanning calorimetry (DSC). Then, the performance of eutectic mixture during charging process under different fin widths in vertical condition, and performance during charging and discharging processes under different inlet temperature heat transfer fluid (HTF) in horizontal condition were investigated, respectively. The results revealed that the LA-SA eutectic mixture had the suitable phase change temperature and desired …

Creep Behaviour And Constitutive Model Of Coal Filled With Gas, Xiangchun Li, Chunli Yang, Ting X. Ren, Baisheng Nie, Caihong Zhao, Shuiwen Liu, Tao Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

Coal exhibits different creep behaviours when filled with different amounts of gas. Creep tests of coal filled with 0 and 0.5. MPa. gas were performed, and strain under different axial stress was compared. The three creep constitutive models which were analysed using the method fitting experimental data for determining which creep model can reflect the creep process of the test best. The results show that the deformation of coal filled with 0.5. MPa. gas is more higher than that of coal filled with 0. MPa. gas under the same axial stress. Gas plays a positive effect on the deformation of …

Comparison Of The Exergy Efficiency Of Four Power Generation Systems From Methane Using Fuel Cells, Zhe-Lei Wang, Weiyu Fan, Guangqing Zhang

Faculty of Engineering and Information Sciences - Papers: Part B

Exergy analyses are carried out on four different solid oxide fuel cell (SOFC) systems using methane as the original fuel, with focus on exergy flows, efficiency and destruction. The four processes are (1) CH₄-SOFC, which is a CH₄ directly fuelled SOFC system with a CO₂ capture unit; (2) CH₄-SOFC-CLC, in which the CH₄-SOFC system is integrated with chemical looping combustion (CLC); (3) SMR-SOFC, i.e. a SOFC system using H₂ (H₂-SOFC) generated by steam methane reforming (SMR); (4) MC-SOFC-DCFC, which is a combined system of H₂-SOFC and a …

Analysis On Integrated Lpg Cook Stove And Induction Cooktop For Cooking Purposes In Bhutan, Roshan Chheti, Dawa Chhoedron, Tilak Sunwar, Duane A. Robinson

Faculty of Engineering and Information Sciences - Papers: Part B

It has not been many years since a majority of Bhutanese were cooking with firewood as their fuel source. However, over the years the fuel mix has been changing and depicting increasing share of clean fuel such as electricity (hydropower generation) and liquefied petroleum gas (LPG). Subsequently there is a massive opportunity to switch into modern, clean and efficient cooking technologies such as induction cooktops and reduce the overall fuel/wood consumption. Induction cooktop is a fairly new concept in the country; therefore, users are often sceptical about investing in them due to lack of awareness on the cost-benefit analysis. Various …

African Societal Challenges Transformation Through Iot, Salim Al Isma'ili, Mengxiang Li, Jun Shen, Qiang He, Abdulaziz Alghazi

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Explicit Stress-Strain Equations For Modelling Frictional Materials, K J. Xu, Martin D. Liu, Buddhima Indraratna, Suksun Horpibulsuk

Faculty of Engineering and Information Sciences - Papers: Part B

In this paper, a comprehensive study on simulating the shearing behavior of frictional materials is performed. A set of two explicit equations, describing the relationship among the shear stress ratio and the distortional strain and the volumetric strain, are formulated independently. The equations contain three stress parameters and three strain parameters and another parameter representing the nonuniformity of stress and strain during softening. All the parameters have clear physical significance and can be determined experimentally. It is demonstrated that the proposed equations have the capacity of simulating the complicated shearing behavior of many types of frictional materials including geomaterials. The …

Designing And Using Self-Paced Tutorials: Lessons From The Pilot, Sasha Nikolic, Raad Raad

Faculty of Engineering and Information Sciences - Papers: Part B

CONTEXT The literature has shown the importance of students developing threshold concepts and undertaking formative assessment. There are also suggestions within the literature that many students will not undertake beneficial activities that display no direct reward in terms of grades. A new electrical engineering common first year subject with 450 students resulted in bottle necks for providing effective feedback. An online self-paced tutorial resource was created that advanced students through core threshold concepts, supplemented with non-assessed activities that guided students through the process of solving problems and understanding class material

Characterization Of Proton Pencil Beam Scanning And Passive Beam Using A High Spatial Resolution Solid-State Microdosimeter, Linh T. Tran, Lachlan Chartier, David Bolst, Alex Pogossov, Susanna Guatelli, Marco Petasecca, Michael L. F Lerch, Dale A. Prokopovich, Mark I. Reinhard, Ben Clasie, Nicolas Depauw, Hanne Kooy, Jacob B. Flanz, Aimee L. Mcnamara, Harald Paganetti, Chris Beltran, Keith Furutani, Vladimir Perevertaylo, Michael A. Jackson, Anatoly B. Rosenfeld

Faculty of Engineering and Information Sciences - Papers: Part B

This work aims to characterize a proton pencil beam scanning (PBS) and passive double scattering (DS) systems as well as to measure parameters relevant to the relative biological effectiveness (RBE) of the beam using a silicon on insulator (SOI) microdosimeter with well-defined 3D sensitive volumes (SV). The dose equivalent downstream and laterally outside of a clinical PBS treatment field was assessed and compared to that of a DS beam.

Threat Models For Analyzing Plausible Deniability Of Deniable File Systems, Michal Kedziora, Yang-Wai Chow, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part B

Plausible deniability is a property of Deniable File System (DFS), which are encrypted using a Plausibly Deniable Encryption (PDE) scheme, where one cannot prove the existence of a hidden file system within it. This paper investigates widely used security models that are commonly employed for analyzing DFSs. We contend that these models are no longer adequate considering the changing technological landscape that now encompass platforms like mobile and cloud computing as a part of everyday life. This necessitates a shift in digital forensic analysis paradigms, as new forensic models are required to detect and analyze DFSs. As such, it is …

Simulations Of Hydro-Mechanical Deep Drawing Using Voronoi Model And Real Microstructure Model, Dongbin Wei, Liang Luo, Hideki Sato, Zhengyi Jiang, Kenichi Manabe

Faculty of Engineering and Information Sciences - Papers: Part B

Micro hydroforming is promising for fabricating complex micro components with a high aspect ratio. The aim of this study is to deepen the understanding of the size effects in micro hydroforming. Experimental work and FEM simulations of micro hydro-mechanical deep drawing (MHDD) were conducted. Voronoi model and real microstructure model were established. Real grain morphology can be considered in the real microstructure model. Local thinning in critical area of the drawn cups due to size effects can be predicted by the models. The simulation results agree with the MHDD test results.

Feasibility Of Free Breathing Lung Mri For Radiotherapy Using Non-Cartesian K-Space Acquisition Schemes, Shivani Kumar, Robba Rai, Alto Stemmer, Sonal Josan, Lois C. Holloway, Shalini K. Vinod, Daniel Moses, Gary P. Liney

Faculty of Engineering and Information Sciences - Papers: Part B

Objective:

To test a free-breathing MRI protocol for anatomical and functional assessment during lung cancer radiotherapy by assessing two non-Cartesian acquisition schemes based on T₁ weighted 3D gradient recall echo sequence: (i) stack-of stars (StarVIBE) and (ii) spiral (SpiralVIBE) trajectories. Methods:

MR images on five healthy volunteers were acquired on a wide bore 3T scanner (MAGNETOM Skyra, Siemens Healthcare, Erlangen, Germany). Anatomical image quality was assessed on: (1) free breathing (StarVIBE), (2) the standard clinical sequence (volumetric interpolated breath-hold examination, VIBE) acquired in a 20 second (s) compliant breath-hold and (3) 20 s non-compliant breath-hold. For functional assessment, StarVIBE …

Shear Thickening Fluids In Protective Applications: A Review, Selim Gürgen, Melih Cemal Kushan, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part B

A thorough and critical review on Shear Thickening Fluids (STFs) is presented based on a literature survey. The rheological properties of STFs are discussed considering many factors affecting shear thickening behavior and the use of STFs in protective systems is reviewed. The main focus of this review is multi-phase STFs, relatively new to the literature (in the last five years). Multi-phase STFs include a second phase in suspensions and the influences of this additional phase on rheological behavior and protective applications are discussed extensively. Based on this extended review, STF do benefit protective applications, but the major contribution is not …

A Mathematical Model For End-Product Toxicity, Mark Nelson

Faculty of Engineering and Information Sciences - Papers: Part B

Alcohol based biofuels, such as bio-butanol, have considerable potential to reduce the demand for petrochemical fuels. However, one of the main obstacles to the commercial development of biological based production processes of biofuels is end-product toxicity to the biocatalyst. We investigate the effect of end-product toxicity upon the steady-state production of a biofuel produced through the growth of microorganisms in a continuous flow bioreactor. The novelty of the model formulation is that the product is assumed to be toxic to the biomass. The increase in the per-capita decay rate due to the presence of the product is assumed to be …

Optimal Control Based Stiffness Identification Of An Ankle-Foot Orthosis Using A Predictive Walking Model, Manish Sreenivasa, Matthew Millard, Martin Felis, Katja Mombaur, Sebastian I. Wolf

Faculty of Engineering and Information Sciences - Papers: Part B

Predicting the movements, ground reaction forces and neuromuscular activity during gait can be a valuable asset to the clinical rehabilitation community, both to understand pathology, as well as to plan effective intervention. In this work we use an optimal control method to generate predictive simulations of pathological gait in the sagittal plane. We construct a patient-specific model corresponding to a 7-year old child with gait abnormalities and identify the optimal spring characteristics of an ankle-foot orthosis that minimizes muscle effort. Our simulations include the computation of foot-ground reaction forces, as well as the neuromuscular dynamics using computationally efficient muscle torque …

Load And Moment Interaction Diagram For Circular Concrete Columns Reinforced With Gfrp Bars And Gfrp Helices, Hogr Karim, M Neaz Sheikh, Muhammad N. S Hadi

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents analytical and experimental studies on the axial load-bending moment behavior of glass fiber-reinforced polymer (GFRP) bars and helices RC columns. The nominal axial load and bending moment of the columns were analyzed based on the stress-strain behavior of the cross-sectional components. A numerical integration method was used to determine the compressive force of concrete in the compression region. The analytical results were verified with experimental results of 12 circular specimens reinforced with GFRP bars and GFRP helices. Out of these 12 specimens, eight specimens were taken from available literature and four specimens were tested in this study. …

Laboratory Study On Impulse Current Characteristics Of Clay, Pingping Rao, Qingsheng Chen, Sanjay Nimbalkar, Yang Liu

Faculty of Engineering and Information Sciences - Papers: Part B

Lightning is recognised as one of the most detrimental natural disasters. While numerous research studies were carried out on the lightning impulse characteristics of the grounding system and the critical breakdown characteristics of soil, little attention was paid to the impulse current characteristics of soils when lightning strikes. In this study, the performance of typical soft soil in Shanghai under the action of lightning is analyzed. Different factors, including the impulse current waveforms, the front time and half peak time of impulse current, the quantity of electric charge and absorption of unit heat, have been studied by performing a series …

Energy Efficiency Of Uplink Massive Mimo Systems With Successive Interference Cancellation, Tianle Liu, Jun Tong, Qinghua Guo, Jiangtao Xi, Yanguang Yu, Zhitao Xiao

Faculty of Engineering and Information Sciences - Papers: Part B

The energy efficiency (EE) of an uplink massive multiple-input multiple-output system depends strongly on the number of antennas at base stations (BSs) and the receiver architecture. The existing research has focused on linear receivers, such as those based on zero forcing (ZF) or linear minimum mean squared error detectors. In this letter, we investigate the EE when nonlinear successive-interference cancellation (SIC) receivers are employed at the BSs and provide an asymptotic analysis of the total transmit power with ZF-SIC. We show that to achieve the same spectrum efficiency, the SIC receivers require fewer antennas at BSs, but only moderate increase …

Limit Analysis Of Ground Anchor Forces, Shiguo Xiao, Wei Dong Guo

Faculty of Engineering and Information Sciences - Papers: Part B

An anchored sheet wall is commonly used in retaining deep excavations. Anchor force is one of the critical design parameters in practice. Based on the kinematical admissible failure mechanism, a limit analysis approach to determine the anchor force is presented. The explicit formula for the anchor force is given, which makes it easy to calculate using a simple calculation program such as MS Office Excel. Anchor force is mainly influenced by seven parameters: the internal friction angle; cohesion of the soil; wall friction angle; surcharge on the ground surface; dip angle of the anchor; penetration depth of the wall; and …

Role Of Membrane Fouling Substances On The Rejection Of N-Nitrosamines By Reverse Osmosis, Takahiro Fujioka, Hitoshi Kodamatani, Hidenobu Aizawa, Stephen Gray, Kenneth P. Ishida, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part B

The impact of fouling substances on the rejection of four N-nitrosamines by a reverse osmosis (RO) membrane was evaluated by characterizing individual organic fractions in a secondary wastewater effluent and deploying a novel high-performance liquid chromatography-photochemical reaction-chemiluminescence (HPLC-PR-CL) analytical technique. The HPLC-PR-CL analytical technique allowed for a systematic examination of the correlation between the fouling level and the permeation of N-nitrosamines in the secondary wastewater effluent and synthetic wastewaters through an RO membrane. Membrane fouling caused by the secondary wastewater effluent led to a notable decrease in the permeation of N-nitrosodimethylamine (NDMA) while a smaller but nevertheless …

Effects Of Aerodynamic Damping On The Tower Load Of Offshore Horizontal Axis Wind Turbines, Xiong Liu, Cheng Lu, Gangqiang Li, Ajit R. Godbole, Yan Chen

Faculty of Engineering and Information Sciences - Papers: Part B

Aerodynamic damping has an important effect on the dynamic response of offshore Horizontal Axis Wind Turbines (HAWTs). In this paper, an analysis of the loads on offshore HAWTs is presented. The analysis combines the aerodynamics, hydrodynamics and structural dynamics of the structure, and includes the effects of aerodynamic damping. The aim is to better understand the role of aerodynamic damping during the interaction of wind and wave and the structure, and to quantitatively evaluate the effects of aerodynamic damping on the lifetime fatigue load on offshore HAWT towers. The aerodynamic loads are estimated using the Blade Element-Momentum (BEM) theory, including …

Persuasive Systems Design Features In Promoting Medication Management For Consumers, Khin Than Win, Judy Mullan, Sarah Katherine Howard, Harri Oinas-Kukkonen

Faculty of Engineering and Information Sciences - Papers: Part B

Medication safety continues to be a growing concern in the healthcare industry. Providing medication information to consumers and supporting self- management would help to reduce medication errors and to increase medication adherence. This paper reviews the persuasive systems design features used in current medication management applications for consumers. A database search was conducted to identify relevant articles, which were then reviewed using the Persuasive Systems Design model as a framework for analysis. The results highlighted the applicability of these features for the medication management information systems available to consumers. Primary task support and Dialogue support categories were highly cited in …

Reinforced Concrete Beams Strengthened In Flexure With Near-Surface Mounted (Nsm) Cfrp Strips: Current Status And Research Needs, Shi Shun Zhang, Tao Yu, G M. Chen

Faculty of Engineering and Information Sciences - Papers: Part B

The near-surface mounted (NSM) FRP strengthening technique has attracted worldwide attention as an effective alternative to the externally bonded (EB) FRP strengthening technique. In the NSM FRP strengthening method, grooves are first cut in the concrete cover of a concrete member for the FRP reinforcement to be inserted and embedded using an adhesive. The NSM FRP method has many advantages over the EB FRP method, including a higher bonding efficiency and a better protection of the FRP reinforcement. Existing experimental studies have shown that FRP strips owned a better bond efficiency compared with other section shapes (e.g. round bars and …

A Mann-Whitney Type Effect Measure Of Interaction For Factorial Designs, Jan De Neve, Olivier Thas

Faculty of Engineering and Information Sciences - Papers: Part B

We propose a measure for interaction for factorial designs that is formulated in terms of a probability similar to the effect size of the Mann-Whitney test. It is shown how asymptotic confidence intervals can be obtained for the effect size and how a statistical test can be constructed. We further show how the test is related to the test proposed by Bhapkar and Gore [Sankhya A, 36:261-272 (1974)]. The results of a simulation study indicate that the test has good power properties and illustrate when the asymptotic approximations are adequate. The effect size is demonstrated on an example dataset.

A Highly Accelerated Parallel Multi-Gpu Based Reconstruction Algorithm For Generating Accurate Relative Stopping Powers, Paniz Karbasi, Ritchie Cai, Blake Schultze, Hanh Nguyen, Jones Reed, Patrick Hall, Valentina Giacometti, Vladimir Bashkirov, Robert P. Johnson, Nick Karonis, Jeffrey Olafsen, Caesar Ordonez, Keith Schubert, Reinhard W. Schulte

Faculty of Engineering and Information Sciences - Papers: Part B

Low-dose Proton Computed Tomography (pCT) is an evolving imaging modality that is used in proton therapy planning which addresses the range uncertainty problem. The goal of pCT is generating a 3D map of relative stopping power measurements with high accuracy within clinically required time frames. Generating accurate relative stopping power values within the shortest amount of time is considered a key goal when developing an image reconstruction software. The existing image reconstruction softwares have successfully met this time frame and even exceeded this time goal, but require clusters with hundreds of processors. This paper describes a novel reconstruction technique using …

The State Of The Art Of Battery Charging Infrastructure For Electrical Vehicles: Topologies, Power Control Strategies, And Future Trend, Viet Thang Tran, Danny Sutanto, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part B

Electric vehicle battery (EVB) charger topologies play a vital role to increase the penetration of EVs. This paper reviews the status quo of EV battery (EVB) chargers in term of converter topologies, operation modes, and power control strategies for EVs. EVB Chargers are classified based on their power levels and power flow direction. Referring to power ratings, EV chargers can be divided into Level 1, Level 2 and Level 3. Level 1 and Level 2 are normally compatible with on-board chargers while Level 3 is used for an off-board charger. Unidirectional/bidirectional power flow can be obtained at all power levels. …

Cause And Effect Of Overvoltage On The Lv Network, Jason R. David, Sean T. Elphick, Matthew Crawford

Faculty of Engineering and Information Sciences - Papers: Part B

Research at the Australian Power Quality & Reliability Centre has identified sustained overvoltage to be a common phenomenon with serious impacts on a range of components connected to the electricity supply network. Whilst there are many causes for the issue it has been determined that the continued proliferation of distributed energy resources like small scale PV solar systems, may have considerable influence on the network's voltage. This paper investigates the reasons behind the continued increase in voltage levels and the impact it is having on connected devices. Research and experimental work has been carried out to quantify these effects showing …

What Have We Gots Here? New Ways For Delivering Information Literacy At The University Of Wollongong Library, Laura Lidden, Nick Zografos

Senior Deputy Vice-Chancellor and Deputy Vice-Chancellor (Education) - Papers

Responding to student feedback on difficulties with navigating the website and discovery layer, the Library initiated a priority project for Content Strategy and a review of discovery layer functionality. As part of this, we wanted to help students improve their navigation of the online environment at point of need. A cross-functional production team was formed to:

• Target student ‘struggle spots’
• Match the need with a suitable technology
• Deliver a timely and sustainable solution through tailored, engaging, accessible Digital Learning Objects (DLOs).

In higher education, libraries have typically relied on passive learning techniques such as video instruction. In a search for …

The Guide To Fostering Asynchronous Online Discussion In Higher Education, Irina Verenikina, Pauline T. Jones, Janine Delahunty

Senior Deputy Vice-Chancellor and Deputy Vice-Chancellor (Education) - Papers

No abstract provided.

Heroic Struggles, Criminals And Scientific Breakthroughs: Adhd And The Medicalization Of Child Behaviour In Australian Newsprint Media 1999-2009, Valerie Harwood, Sandra C. Jones, Andrew D. Bonney, Samantha Mcmahon

Faculty of Social Sciences - Papers (Archive)

There is a dearth of scholarly analysis and critique of the Australian newsprint media's role in the medicalization of child behaviour. To begin to redress this lack this paper analyses newsprint media's use of metaphors that re/describe and construct realities of ADHD with a medicalizing effect. The interdisciplinary team used the FactivaTM database to locate and review 453 articles published in Australian national and metropolitan newspapers during the decade 1999-2009. Data analysis involved generating statistical descriptions of the dataset according to attributes such as: date, state, newspaper titles and author names. This was followed by inductive analysis of article content. …