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Book Review: Controlled And Living Polymerizations: From Mechanisms To Applications, Jennifer M. Heinen 2010 Iowa State University

Book Review: Controlled And Living Polymerizations: From Mechanisms To Applications, Jennifer M. Heinen

Chemical and Biological Engineering Publications

Controlled/living polymerization makes it possible to synthesize polymers of low polydispersity with a predefined molecular weight and specified chain architecture. Such polymers are desirable for a broad range of applications, including coatings, adhesives, and lubricants. Although living polymerization was first discovered in anionic polymerizations in 1956, several decades passed prior to the development of living polymerization techniques for carbocationic polymerization (1984) and ring-opening metathesis polymerization (1986). During the 1990s, several techniques were developed for controlled/living free radical polymerizations. The development of these techniques led to a dramatic increase in the number of research publications dedicated to improving the ...


Periodic Step Arrays On The Aperiodic I-Al-Pd-Mn Quasicrystal Surface At High Temperature, Y. Sato, Barış Ünal, Thomas A. Lograsso, Patricia A. Thiel, A. K. Schmid, T. Duden, N. C. Bartelt, K. F. McCarty 2010 University of California, Davis

Periodic Step Arrays On The Aperiodic I-Al-Pd-Mn Quasicrystal Surface At High Temperature, Y. Sato, Barış Ünal, Thomas A. Lograsso, Patricia A. Thiel, A. K. Schmid, T. Duden, N. C. Bartelt, K. F. Mccarty

Chemistry Publications

We have observed the configuration and motion of surface steps on the aperiodic icosahedral (i-) Al-Pd-Mn quasicrystal using low-energy electron microscopy and scanning tunneling microscopy. As the quasicrystal is cooled from high temperature, bulk vacancies migrate to the surface causing the surface to be etched. Surprisingly, this etching occurs by two types of steps with different heights moving in different directions with different velocities. The steady-state surface morphology is a uniformly spaced rhomboidal step network. This network requires that the layer stacking near the surface deviates from the bulk quasicrystal stacking.


Multifunctional Polymer Synthesis And Incorporation Of Gadolinium Compounds And Modified Tungsten Nanoparticles For Improvement Of Radiation Shielding For Use In Outer Space, Emily Grace Harbert 2010 College of William & Mary - Arts & Sciences

Multifunctional Polymer Synthesis And Incorporation Of Gadolinium Compounds And Modified Tungsten Nanoparticles For Improvement Of Radiation Shielding For Use In Outer Space, Emily Grace Harbert

Dissertations, Theses, and Masters Projects

No abstract provided.


Solid-Liquid Separation Technologies In The Conversion Of Bagasse To Liquid Fuel, Keith Miller 2010 Louisiana State University and Agricultural and Mechanical College

Solid-Liquid Separation Technologies In The Conversion Of Bagasse To Liquid Fuel, Keith Miller

LSU Master's Theses

Development of liquid biofuels has entered a new phase of large scale pilot demonstrations. A number of plants in operation or under construction face the engineering challenges of creating a viable plant design, scaling up, and optimizing various unit operations. It is well-known that separation technologies account for 50-70% of both capital and operating costs. Processes vary in terms of selection of unit operations; however, solid-liquid separations are likely to be a major contributor to the overall project costs. A typical process for ethanol production from biomass includes several solid-liquid separation steps. The nature of biomass derived materials makes it ...


Numerical Investigation Of The Transient Multiphase Flow In An Ironmaking Blast Furnace, Zongyan Zhou, Haiping Zhu, Aibing Yu, Paul Zulli 2010 University of New South Wales

Numerical Investigation Of The Transient Multiphase Flow In An Ironmaking Blast Furnace, Zongyan Zhou, Haiping Zhu, Aibing Yu, Paul Zulli

Faculty of Engineering and Information Sciences - Papers: Part A

Discrete particle simulation (DPS) has been applied to multiphase flow modelling in an ironmaking blast furnace (BF), including burden distribution at the top, gas-solid flow in the BF shaft and raceway, and liquid-solid flow in the hearth. In this work, the approach is further extended to take into account the transient features of gas and particle flow coupled with liquid tapping operation. In the simulation, two types of particles of coke and ore with different physical properties are considered, together with different shapes of the cohesive zone and the shrinkage of size of ore particles in the cohesive zone to ...


Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-ce Gao 2010 The Hong Kong Polytechnic University

Performance Enhancement Of A Complex Chilled Water System Using A Check Valve: Experimental Validation, Shengwei Wang, Zhenjun Ma, Dian-Ce Gao

Faculty of Engineering - Papers (Archive)

The large primary–secondary chilled water systems often suffer from the excess flow demand and low chilled water temperature difference, which is known as the low ΔT central plant syndrome, during operation. This paper presents an approach for experimental validation of the possible utility of a check valve (i.e., putting a one-direction check valve in the chilled water by-pass line) to solve this operational problem and enhance the overall system performance, prior to a check valve is really installed. The experimental tests were carried out on the complex central chiller plant in a super high-rise building using a simulated ...


Influences On The Prediction Of Conveyor Trajectory Profiles, David B. Hastie, P W. Wypych, P C. Arnold 2010 University of Wollongong

Influences On The Prediction Of Conveyor Trajectory Profiles, David B. Hastie, P W. Wypych, P C. Arnold

Faculty of Engineering - Papers (Archive)

Seven belt conveyor trajectory methods, C.E.M.A., M.H.E.A., Booth, Golka, Korzen, Goodyear, and Dunlop, are presented with their differences explained. Each method uses equations to determine the X and Y coordinates of the trajectory profile. Some methods also use graphical approaches, which allow a quicker determination of the trajectory. Methods such as C.E.M.A., Goodyear, and Dunlop use very few particle properties, while the Korzen method uses many. The parameters used in each method have been investigated to evaluate their impact on the predicted conveyor trajectory. The parameters that showed the most influence ...


Evaluating Online Multiple Choice Quizzes As Formative Assessment Tools In An Engineering Fluid Mechanics Subject, David B. Hastie, Thomas Goldfinch 2010 University of Wollongong

Evaluating Online Multiple Choice Quizzes As Formative Assessment Tools In An Engineering Fluid Mechanics Subject, David B. Hastie, Thomas Goldfinch

Faculty of Engineering - Papers (Archive)

In an effort to improve learning outcomes in a second year Engineering Fluid Mechanics subject, the first author has developed and piloted a series of online multiple choice quizzes (MCQ) as formative assessment tools. This paper describes the development and implementation of these quizzes and the evaluation of their effect on students’ results in a formal written mid-session exam and also final exam. Students’ perception of the quizzes is also captured and discussed through the use of a brief, in class survey. The effect of these MCQs was investigated for two main cohorts of students, those who voluntarily attempted the ...


Seismic Performance-Based Design Of Bridges With Quantitative Local Performance Criteria, M Neaz Sheikh, Frederic Legeron 2010 University of Wollongong

Seismic Performance-Based Design Of Bridges With Quantitative Local Performance Criteria, M Neaz Sheikh, Frederic Legeron

Faculty of Engineering - Papers (Archive)

Performance based design of bridges for earthquake resistance is still not explicitly used in design. However, most codes specify a level of performance for bridges under various earthquake inputs. In principle, design rules suggested in the code should meet stipulated performance criteria. However, it has been highlighted in the past that design rules are not directly related with stipulated performance criteria. After the presentation of performance criteria and their relation with post-earthquake functional requirements, the article examines the case of the Canadian Bridge Design Code (CAN/CSA-S6-06). Performance of bridges designed with this code is predicted and compared to expected ...


Scrap-Tyre Soil Mixture For Seismic Protection, M S. Mashiri, M Neaz Sheikh, J S. Vinod, Hing Ho Tsang 2010 University of Wollongong

Scrap-Tyre Soil Mixture For Seismic Protection, M S. Mashiri, M Neaz Sheikh, J S. Vinod, Hing Ho Tsang

Faculty of Engineering - Papers (Archive)

Scrap tyre stockpile has been a significant disposal problem around the world. Significant research attention has been devoted in recent years to find new beneficial ways to recycle and reuse the huge stockpile. This paper proposes a new method of utilizing scrap tyres for infrastructure protection. The method involves mixing scrap tyres with soil materials and placing the mixtures around foundations for vibration absorption. This method provides two major benefits: (i) the low-cost would make it accessible to developing countries and rural areas of developed countries where resources and technology are not adequate for earthquake mitigation with welldeveloped, expensive, techniques ...


Yield Curvature For Seismic Design Of Circular Reinforced Concrete Columns, M Neaz Sheikh, H. H. Tsang, T. J. McCarthy, N.T.K Lam 2010 University of Wollongong

Yield Curvature For Seismic Design Of Circular Reinforced Concrete Columns, M Neaz Sheikh, H. H. Tsang, T. J. Mccarthy, N.T.K Lam

Faculty of Engineering - Papers (Archive)

Significant research efforts have been devoted in recent years to the development of displacement-based seismic assessment and design methodology, recognising the shortcomings of traditional, code-specified force-based procedures. Recent advances in direct displacement-based seismic design of columns rely on the estimates of yield curvature for determining seismic design forces to satisfy the specified seismic performance levels. This paper presents simple expressions for estimating the effective yield curvature for normal- and high-strength circular reinforced concrete columns based on moment–curvature analyses of a large number of column sections. Such expressions can be programmed into spreadsheet format and can be used for 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 ...


Design And Implementation Of Edge Detection Algorithm In Dspic Embedded Processor, Prashan Premaratne, Sabooh Ajaz, Ravi Monaragala, Nalin Bandara, Malin Premaratne 2010 University of Wollongong

Design And Implementation Of Edge Detection Algorithm In Dspic Embedded Processor, Prashan Premaratne, Sabooh Ajaz, Ravi Monaragala, Nalin Bandara, Malin Premaratne

Faculty of Engineering - Papers (Archive)

The research presented here is an attempt to use a very basic, low cost and non-specialized microcontroller for image processing tasks. The applications emanating from such an attempt will result in inexpensive face detection, intelligent motion sensors to low cost vehicle counting systems. We have been able to develop a system based on Microchip dsPIC microcontroller that implements edge detection of still images. Hardware-based signal processors such as Texas Instrument DSP (Digital Signal Processing) or Field Gate Arrays (FPGA) are generally an expensive solution for image processing applications. On the other hand a conventional 8-bit microcontroller doesn’t have enough ...


Mechanisms Of X-Ray Emission From Peeling Adhesive Tape, Evan Constable, Josip Horvat, R. A. Lewis 2010 University of Wollongong

Mechanisms Of X-Ray Emission From Peeling Adhesive Tape, Evan Constable, Josip Horvat, R. A. Lewis

Faculty of Engineering - Papers (Archive)

It has previously been reported that x-rays are emitted when adhesive tape is peeled in a vacuum but no account of the dependence of the x-ray emission on the pressure of the environment has been given to date. In this paper we present detailed experimental data on the number and angular distribution of x-ray photons as a function of pressure. We find that x-rays are emitted for pressures between p0 = 10−3 and p1 = 10−2 mBar, with ∼ 106 counts/(cm2 s) recorded by a 256×256 pixel2 silicon array sensor placed 35 mm from ...


Rational Revalidation, Hosam Aleem, Timothy J. McCarthy, Rodger Edwards 2010 Univ of Manchester

Rational Revalidation, Hosam Aleem, Timothy J. Mccarthy, Rodger Edwards

Faculty of Engineering - Papers (Archive)

The economic problems the world is currently facing have caused severe cost pressure on pharmaceutical manufacturing. Revalidation of manufacturing processes and equipment comprises a significant cost to the industry. Maintaining a validated status is a regulatory requirement. Technical issues, patient risk, and business considerations impact the organizational approach to revalidation. This discussion addresses the need for revalidation with particular attention to business considerations. Strategies to prioritise revalidation among systems and how to decide on what, how, and when to revalidate are discussed. Alternative approaches when revalidation is not possible are suggested. Costs associated with revalidation are described. Activities to reduce ...


Detection Of Biochar Components For Soil Fertility Using Thz-Tds, E M. Pogson, J Horvat, Roger A. Lewis, S D. Joseph 2010 University of Wollongong

Detection Of Biochar Components For Soil Fertility Using Thz-Tds, E M. Pogson, J Horvat, Roger A. Lewis, S D. Joseph

Faculty of Engineering - Papers (Archive)

Different forms of biochar can have greatly different properties as fertilisers, yet there is no effective screening method to distinguish them. Terahertz Time Domain Spectroscopy has been used to distinguish various biochars, including Sawdust char, BMC5 with lime char and Saligna char.


Solar-Powered Compaction Garbage Bins In Public Areas: A Preliminary Economic And Environmental Evaluation, Poppy Coleman, Long Nghiem 2010 University of Wollongong

Solar-Powered Compaction Garbage Bins In Public Areas: A Preliminary Economic And Environmental Evaluation, Poppy Coleman, Long Nghiem

Faculty of Engineering - Papers (Archive)

An excel-based model was developed to evaluate economic and environmental benefits of the solar-powered compaction garbage bins in public areas in Australia. Input data were collected from Brisbane and Wollongong City councils, and Sydney Olympic Park. The results demonstrate that solar-powered compaction garbage bins would provide environmental benefits in all scenarios. However, results of the economic analysis of the three studied areas varied significantly. The unique situation of Sydney Olympic Park made implementation in that facility particularly appealing. A lower monthly rental cost is needed for the implementation of this novel waste management practice.


Splitter-Plate Wake Stabilisation And Low Aspect Ratio Cylinder Flow-Induced Vibration Mitigation, Brad Stappenbelt 2010 University of Wollongong

Splitter-Plate Wake Stabilisation And Low Aspect Ratio Cylinder Flow-Induced Vibration Mitigation, Brad Stappenbelt

Faculty of Engineering - Papers (Archive)

This paper investigates the proposed utility of splitter-plate wake stabilisation as a passive control mechanism for vortexinduced vibration (VIV) mitigation for low aspect ratio cylinders. Stationary cylinder experiments have repeatedly demonstrated the effectiveness of splitter plates in reducing lift and drag coefficients for a cylinder in uniform flow. Rigid attached splitter plates have been shown to be capable of completely eliminating vortex shedding in fixed cylinder investigations. In the limited number of studies that have examined the use of splitter plates in a system which is free to vibrate in the direction transverse to the flow, a galloping-type response has ...


Stabilization Of An Erodible Soil Using A Chemical Admixtures, Buddhima Indraratna, M.A.A Mahamud, J S. Vinod, Vasantha Wijeyakulasuriya 2010 University of Wollongong

Stabilization Of An Erodible Soil Using A Chemical Admixtures, Buddhima Indraratna, M.A.A Mahamud, J S. Vinod, Vasantha Wijeyakulasuriya

Faculty of Engineering - Papers (Archive)

This paper presents internal erosion behaviour of an erodible soil stabilized by chemical admixtures using a novel Process Simulation Apparatus for Internal Crack Erosion (PSAICE), designed and built at University of Wollongong. Laboratory tests were carried out on typical erodible soils (collected from Wombeyan caves, Australia) stabilised using chemical admixtures such as lignosulfonate and cement. Test results reveal that the erosion parameters such as critical shear stress and coefficient of soil erosion were improved with the increase in the amount of chemicals. It has been seen that lignosulfonate exhibits better performance in stabilizing the erodible soil compared to cement. Based ...


The Behaviour Of Ballasted Track Foundations: Track Drainage And Geosynthetic Reinforcement, Buddhima Indraratna, Sanjay Nimbalkar, Nayoma Chulani Tennakoon 2010 University of Wollongong

The Behaviour Of Ballasted Track Foundations: Track Drainage And Geosynthetic Reinforcement, Buddhima Indraratna, Sanjay Nimbalkar, Nayoma Chulani Tennakoon

Faculty of Engineering - Papers (Archive)

Ballasted Rail tracks are widely used throughout the world due to its resiliency to the repeated wheel loads, low construction cost and ease of maintenance. However, the ballast layer needs periodic maintenance due to its deformation and degradation associated with particle breakage and fouling. A proper understanding of the contamination due to various types of fines and its implications on track drainage is a pre-requisite for effective implementation of track maintenance operations. A new parameter Void Contaminant Index (VCI) can accurately assess the contamination as it includes the effect of void ratio, specific gravity and gradation of ballast and fouling ...


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