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Analysis, Modeling And Imporvement Of Stamped Parts Quality Using Generalized Linear Models, Foad Hassanmirzaei, Zbigniew Pasek 2010 University of Windsor

Analysis, Modeling And Imporvement Of Stamped Parts Quality Using Generalized Linear Models, Foad Hassanmirzaei, Zbigniew Pasek

Industrial and Manufacturing Systems Engineering Publications

This paper presents an approach used for improving the visual quality of body panels produced in an automated press shop of a car manufacturer. To solve the complexproblem of panels’ visual defects,the optimal values of process parameters based on Generalized Linear Models (GLZ) were identified and deployed. The project focused on parts exhibiting excessive rejection rates. To deal effectively with the case in which the distribution function representing the number of defects in the panels was found to be binomial with presence of some covariates in the model, the research approach focused on development of Log it Models.

After ...


Interference Mitigation By Practical Transmit Beamforming Methods In Closed Femtocells, Mika Husso, Jyri Hämäläinen, Riku Jäntti, Juan Li, Edward Mutafungwa, Risto Wichman, Zhong Zheng, Alexander M. Wyglinski 2010 Helsinki University of Technology

Interference Mitigation By Practical Transmit Beamforming Methods In Closed Femtocells, Mika Husso, Jyri Hämäläinen, Riku Jäntti, Juan Li, Edward Mutafungwa, Risto Wichman, Zhong Zheng, Alexander M. Wyglinski

Electrical & Computer Engineering Faculty Publications

We present an analysis of a femtocellular communications network and the impact of cochannel interference on link performance. Furthermore, we propose a method whereby user terminals can maintain a controlonly connection to an adjacent femtocell for interference mitigation purposes. Specifically, we provide an emphasis on suboptimal but practical methods that rely on transmit beamforming. Our numerical results demonstrate that even simple multiantenna methods can be effectively used to suppress co-channel interference provided that control channel connection between interfering femto-base station and user terminal is allowed.


Nitrous Oxide Cooling In Hybrid Rocket Nozzles, Patrick Lemieux 2010 California Polytechnic State University - San Luis Obispo

Nitrous Oxide Cooling In Hybrid Rocket Nozzles, Patrick Lemieux

Mechanical Engineering

The Department of Mechanical Engineering at the California Polytechnic State University, San Luis Obispo, has developed an innovative program of experimental research and development on hybrid rocket motors (where the fuel and the oxidizer are in different phases prior to combustion). One project currently underway involves the development of aerospike nozzles for such motors. These nozzles, however, are even more susceptible to throat ablation than regular converging diverging nozzles, due the nature of their flow expansion mechanism. This paper presents the result of a recent development project focused on reducing throat ablation in hybrid rocket motor nozzles. Although the method ...


Morphological Assessment Of Basic Multicellular Unit Resorption Parameters In Dogs Shows Additional Mechanisms Of Bisphosphonate Effects On Bone, Matthew R. Allen, Antonia M. Erickson, Xiang Wang, David B. Burr, R. Bruce Martin, Scott J. Hazelwood 2010 Indiana University - Purdue University Indianapolis

Morphological Assessment Of Basic Multicellular Unit Resorption Parameters In Dogs Shows Additional Mechanisms Of Bisphosphonate Effects On Bone, Matthew R. Allen, Antonia M. Erickson, Xiang Wang, David B. Burr, R. Bruce Martin, Scott J. Hazelwood

Biomedical and General Engineering

Bisphosphonates (BPs) slow bone loss by reducing initiation of new basic multicellular units (BMUs). Whether or not BPs simply prevent osteoclasts from initiating new BMUs that resorb bone or also reduce the amount of bone they resorb at the BMU level is not clear. The goal of this study was to determine the effects of BPs on three morphological parameters of individual BMUs, resorption depth (Rs.De), area (Rs.Ar), and width (Rs.Wi). After 1 year of treatment with vehicle (VEH), alendronate (ALN; 0.10, 0.20, or 1.00 mg/kg/day), or risedronate (RIS; 0.05, 0 ...


Beneficial Reuse Of Corrugated Board In Slurry Applications, James L. Hanson, Nazli Yesiller, Jagjit Singh, Greg M. Stone, Adam Stephens 2010 California Polytechnic State University - San Luis Obispo

Beneficial Reuse Of Corrugated Board In Slurry Applications, James L. Hanson, Nazli Yesiller, Jagjit Singh, Greg M. Stone, Adam Stephens

Civil and Environmental Engineering

Use of virgin and post-consumer corrugated board as a replacement for bentonite in slurry mixes was investigated. The effectiveness of the slurry mixes was assessed using typical tests including Marsh funnel viscosity, density, and filtrate loss. Filter cake permeability was also determined. Corrugated board was fiberized for the test program. Test results indicated that corrugated board could be used to replace 9 to 27% (0.5 to 1.5% corrugate content) of bentonite in slurry mixes with a total solids content of 5.5%. Slurry applications provide a new and viable beneficial reuse alternative for paper/paperboard products, which constitute ...


Genetic Programming To Investigate Design Parameters Contributing To Crash Occurence On Urban Arterials, Abhishek Das, Mohamed Abdel-Aty, Anurag Pande 2010 University of Central Florida

Genetic Programming To Investigate Design Parameters Contributing To Crash Occurence On Urban Arterials, Abhishek Das, Mohamed Abdel-Aty, Anurag Pande

Civil and Environmental Engineering

Nonlinear models were developed to estimate crash frequency on urban arterials with partial access control. These multilane arterials consist of midblock segments joined by signalized and unsignalized intersections (or access points). Crashes included in the analysis are of three major types: rear-end, angle, and head-on. Each crash type is further sorted into mutually exclusive categories on the basis of the roadway element responsible for the crashes: midblock segment, signalized intersection, and access point. Genetic programming (GP) is adopted for predicting crash frequency. GP, which is primarily based on genetic algorithms, uses the concept of evolution to develop models through the ...


Facility Power Usage Modeling And Short Term Prediction With Artificial Neural Networks, Sunny Wan, Xiao-Hua Yu 2010 California Polytechnic State University - San Luis Obispo

Facility Power Usage Modeling And Short Term Prediction With Artificial Neural Networks, Sunny Wan, Xiao-Hua Yu

Electrical Engineering

Residential and commercial buildings accounted for about 68% of the total U.S. electricity consumption in 2002. Improving the energy efficiency of buildings can save energy, reduce cost, and protect the global environment. In this research, artificial neural network is employed to model and predict the facility power usage of campus buildings. The prediction is based on the building power usage history and weather conditions such as temperature, humidity, wind speed, etc. Different neural network configurations are discussed; satisfactory computer simulation results are obtained and presented.


Enhancement Of Co Substitution Induced By Eu Codoping In Zno-Based Diluted Magnetic Semiconducting Thin Films, P Photongkam, Y B Zhang, M.H.N Assadi, S Li, D Yu, Mihail Ionescu, Alexey V. Pan 2010 University of NSW

Enhancement Of Co Substitution Induced By Eu Codoping In Zno-Based Diluted Magnetic Semiconducting Thin Films, P Photongkam, Y B Zhang, M.H.N Assadi, S Li, D Yu, Mihail Ionescu, Alexey V. Pan

Faculty of Engineering - Papers (Archive)

To avoid the occurrence of doped magnetic ion clustering is a challenge in fabrication of diluted magnetic semiconductors (DMSs). In this work, we report the intrinsic ferromagnetic behavior in Co-doped ZnO DMSs induced by Eu codoping. Both structural parameters and magnetic properties demonstrate the existence of an interaction between Co and Eu ions. The observation of multiplet structures for the localized Co 3d states in x-ray absorption and x-ray magnetic circular dichroism characterization evidences that the codoped Eu plays an important role in facilitating the Co substitution of Zn, leading to intrinsic ferromagnetism.


Peashell-Like Nanostructure-A New Kind Of One-Dimensional Nanostructure: The Case Of Magnesium Oxide, S X. Dou, Zaiping Guo, Rong Zeng, Jun Liu, Wenjun Wang, Xiaolong Chen 2010 University of Wollongong

Peashell-Like Nanostructure-A New Kind Of One-Dimensional Nanostructure: The Case Of Magnesium Oxide, S X. Dou, Zaiping Guo, Rong Zeng, Jun Liu, Wenjun Wang, Xiaolong Chen

Faculty of Engineering - Papers (Archive)

A novel type of 1D nanostructure with characteristics between those of a solid nanowire and a hollow nanotube, i.e. a peashell-like nanostructure comprising a 1D wire with periodically embedded hollow nanobubbles, is presented for the first time; as an example, MgO peashell-like nanostructures exhibit extraordinary dielectric and magnetization properties.


Nanocoating Of Particles For Optimal Doping And Universal Enhancement Of Current-Carrying Ability In "Organic" Mgb2-Xcx Superconductors, Olga V. Shcherbakova, Alexey V. Pan, S X. Dou, Rashmi Nigam, David Wexler 2010 University of Wollongong

Nanocoating Of Particles For Optimal Doping And Universal Enhancement Of Current-Carrying Ability In "Organic" Mgb2-Xcx Superconductors, Olga V. Shcherbakova, Alexey V. Pan, S X. Dou, Rashmi Nigam, David Wexler

Faculty of Engineering - Papers (Archive)

The universal approach of liquid mixing has been found to produce “organic” MgB2−xCx superconductors with structural and supercurrent-carrying properties unattainable by other techniques. We show by transmission electron microscopy combined with energy dispersive spectroscopy that these unique properties are enabled through coating of boron particles with a nanolayer of carbon. The subsequent reaction between carbon-encapsulated boron and magnesium results in enhanced carbon content x in the crystal lattice, as determined by x-ray diffraction pattern analysis. Among various carbon-containing compounds investigated, polycarbosilane has been found to be the optimal dopant for MgB2 superconductor, producing the largest ...


A Stiffness Enhancement Methodology For Artificial Muscles, Rahim Mutlu, Gursel Alici 2010 University of Wollongong

A Stiffness Enhancement Methodology For Artificial Muscles, Rahim Mutlu, Gursel Alici

Faculty of Engineering - Papers (Archive)

Electroactive conducting polymer actuators have been proposed as alternative to conventional actuators due to their extraordinary properties. This paper reports on a stiffness enhancement methodology for cantilever type conducting polymer actuators based on a suitably designed contact surface with which the actuators are in contact during operation. Finite element analysis and modeling are used to quantify the effect of the contact surface on the effective stiffness of a tri-layer cantilevered beam, which represents one-end free, the other end fixed polypyrrole (PPy) conducting polymer actuator under a uniformly distributed load. After demonstrating the feasibility of the stiffness enhancement concept, experiments were ...


Analysis Of Strip Edge Cracks During Cold Rolling Of Thin Strip, Zhengyi Jiang, Haibo Xie, Dongbin Wei 2010 University of Wollongong

Analysis Of Strip Edge Cracks During Cold Rolling Of Thin Strip, Zhengyi Jiang, Haibo Xie, Dongbin Wei

Faculty of Engineering - Papers (Archive)

In this paper, the mechanics of strip edge cracks and its propagation has been studied, and the effects of strip edge drop and stress intensity factor (SIF) on edge crack defections during cold rolling of thin strip have been discussed. An experimental investigation was presented into the effect of strip edge drop on edge cracks during cold rolling of thin strip. The edge crack increases significantly due to more inhomogeneous deformation and work hardening at the strip edge. The effective stress intensity factor range is important as it represents the major physical cause of the crack propagation. The efficiency and ...


Plagiarism In First-Year Engineering Education: A Snapshot Of Student Attitudes And Abilities, Brad Stappenbelt, Chris Rowles 2010 University of Wollongong

Plagiarism In First-Year Engineering Education: A Snapshot Of Student Attitudes And Abilities, Brad Stappenbelt, Chris Rowles

Faculty of Engineering - Papers (Archive)

This paper investigates student attitudes and abilities regarding the growing issue of plagiarism in higher education. The study examined a group of first-year engineering students. These students either matriculated directly from high school or were newly arrived international students and were therefore not likely to be familiar with the Australian university system. Student abilities to recognise plagiarism were examined through a series of writing samples and their attitudes pertaining to plagiarism were also investigated through interviews and surveys. The results revealed that there was little difference between the international and first-year Australian students' abilities to detect plagiarism. Skill deficiencies and ...


"Organic" Mgb2-Xcx Superconductor With High Performance Enabled By Liquid Mixing Approach, Olga V. Shcherbakova, Alexey V. Pan, Emil Babic, S. X. Dou 2010 University of Wollongong

"Organic" Mgb2-Xcx Superconductor With High Performance Enabled By Liquid Mixing Approach, Olga V. Shcherbakova, Alexey V. Pan, Emil Babic, S. X. Dou

Faculty of Engineering - Papers (Archive)

Comparative analysis of structural and electromagnetic characteristics have been performed on nano SiC- and polycarbosilane-doped MgB2 samples prepared by the dry and liquid mixing approaches. The total benefit of liquid mixing approach for fabrication of "organic" MgB2 superconductor with excellent electromagnetic performance has been demonstrated


The Comparison Between Nanostructure Control And Other Modifications To Improve The Electrochemical Performance Of Sno, Yong-Mook Kang, Min-Sik Park, Hua-Kun Liu, S. X. Dou 2010 Kongju National University

The Comparison Between Nanostructure Control And Other Modifications To Improve The Electrochemical Performance Of Sno, Yong-Mook Kang, Min-Sik Park, Hua-Kun Liu, S. X. Dou

Faculty of Engineering - Papers (Archive)

With an advent of the ubiquitous era, the demand for rechargeable batteries with a higher energy density is getting more and more critical. It is because applications are emerging such as electric vehicles and various types of portable electronic devices. Carbonaceous materials are commonly adopted as the anode material for commercial lithium-ion secondary batteries because it can reversibly intercalate or de-intercalate Li ion. However, low capacity of carbon has become a limiting factor in wider applications, and high capacity alternative to carbonaceous material has thus been sought for. Even if tin and silicon have been considered as one of the ...


Dynamic Hand Gesture Recognition System Using Moment Invariants, Zhengmao Zou, Prashan Premaratne, Malin Premaratne, Ravi Monaragala, Nalin Bandara 2010 University of Wollongong

Dynamic Hand Gesture Recognition System Using Moment Invariants, Zhengmao Zou, Prashan Premaratne, Malin Premaratne, Ravi Monaragala, Nalin Bandara

Faculty of Engineering - Papers (Archive)

We have developed a dynamic hand gesture recognition system that can simplify the way humans interact with computers and many other non-critical consumer electronic equipment. The proposed system is based on the well-known “Wave Controller” technology developed at the University of Wollongong and will revolutionize video gaming and consumer electronics control interfaces. Currently, computer interfacing mainly involves keyboard, mouse, joystick or gaming wheels and occasionally voice recognition for user input. These modes of interaction have restrained the artistic ability of many users, as they are required to respond to the computer through pressing buttons or moving other apparatus. Voice recognition ...


The Influence Of Action Learning On Student Perception And Performance, Brad Stappenbelt 2010 University of Wollongong

The Influence Of Action Learning On Student Perception And Performance, Brad Stappenbelt

Faculty of Engineering - Papers (Archive)

The study of floating oscillating water column (OWC) wave energy conversion (WEC) device performance includes analysis of the dynamic coupling of the water column and the floating structure. In the present investigation, a mechanical oscillator model was proposed in order to examine this relationship for the heave motion of a floating wave energy conversion device. Characterisation of the dynamic system optimal behaviour was performed by examining the effect of relative OWC and floating structure natural frequencies, the phase relationships of the various system components and the optimal power take-off damping of the system. It was determined that separation of the ...


Mechanical Model Of A Floating Oscillating Water Column Wave Energy Conversion Device, Brad Stappenbelt, Paul Cooper 2010 University of Wollongong

Mechanical Model Of A Floating Oscillating Water Column Wave Energy Conversion Device, Brad Stappenbelt, Paul Cooper

Faculty of Engineering - Papers (Archive)

The study of floating oscillating water column (OWC) wave energy conversion (WEC) device performance includes analysis of the dynamic coupling of the water column and the floating structure. In the present investigation, a mechanical oscillator model was proposed in order to examine this relationship for the heave motion of a floating wave energy conversion device. Characterisation of the dynamic system optimal behaviour was performed by examining the effect of relative OWC and floating structure natural frequencies, the phase relationships of the various system components and the optimal power take-off damping of the system. It was determined that separation of the ...


Synthesis, Structural Characterization And Magnetic Properties Of Iron Boride Nanoparticles With Or Without Silicon Dioxide Coating, Mislav Mustapic, Damir Pajic, Nikolina Novosel, Emil Babic, Kreso Zadro, Marina Cindric, Josip Horvat, Zeljko Skoko, Mirjana Bijelic, Andrey Shcherbakov 2010 University of Wollongong

Synthesis, Structural Characterization And Magnetic Properties Of Iron Boride Nanoparticles With Or Without Silicon Dioxide Coating, Mislav Mustapic, Damir Pajic, Nikolina Novosel, Emil Babic, Kreso Zadro, Marina Cindric, Josip Horvat, Zeljko Skoko, Mirjana Bijelic, Andrey Shcherbakov

Faculty of Engineering - Papers (Archive)

Nanoparticles of iron boride (Fe2B, Fe2B coated in SiO2, FexCo2xB coated in SiO2) were synthesized using the reduction of metal ions by sodium borohydride. X-ray diffraction confirms the amorphicity of the coated compounds and scanning electron microscope imaging revealed the nanoparticulated structure of all compounds. The splitting between zero-field-cooled and field-cooled temperature dependent magnetization curves point to the blocking of superparamagnetic particles magnetization. Magnetic hysteresis loops are however consistent with the combined effects of blocked superparamagnetic and ferromagnetic (multidomain) particles. The observed quite complex magnetic behaviour is in accordance with structural ...


Landslide Recognition Using Lidar Derived Digital Elevation Models-Lessons Learnt From Selected Australian Examples, Anthony Miner, P. Flentje, C. Mazengarb, D. J. Windle 2010 AS Miner Geotechnical, Australia

Landslide Recognition Using Lidar Derived Digital Elevation Models-Lessons Learnt From Selected Australian Examples, Anthony Miner, P. Flentje, C. Mazengarb, D. J. Windle

Faculty of Engineering - Papers (Archive)

The increasing use of LiDAR or airborne laser scanning (ALS) data throughout the world has facilitated widespread access to high resolution current digital elevation models (DEM). Such high resolution DEM’s have proved to be particularly useful in the recognition of landslides and erosion. This is an increasingly important issue in Australia given the publication of the recent Australian Geomechanics Society’s guidelines for landslide risk management which emphasizes the need for improved regional and local landslide inventories. This paper presents recent examples of landslide recognition using such DEM’s from around Australia. Insight is provided into the overall landslide ...


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