Physical Sciences and Mathematics Commons^™

Besov-Spaces On Domains In Rd, Ronald Devore, Robert Sharpley

Robert Sharpley

No abstract provided.

On The Differentiability Of Functions In Rn, Ronald Devore, Robert Sharpley

Robert Sharpley

No abstract provided.

Embedding Distributed Learning Algorithms In Wireless Ad-Hoc Control Networks, A. Desmet, F. Naghdy, M. Ros

Dr Montserrat Ros

With the advances in soft computing techniques and agent technologies, the concept of home ambient intelligence is becoming more and more realistic. Living in a building that adapts itself to the users and assists them in reducing their energy consumption is now within reach. The main technical barrier comes from hardware: servers and industrial control networks do not fit in a house. With the availability of dedicated wireless solutions and low-cost small computation units, the platform to implement task distribution in a control network is now feasible and cost efficient. This paper explores the possibilities of fitting a distributed learning …

Cervical Cancer Classification Using Gabor Filters, - Rahmadwati, Golshah Naghdy, Montserrat Ros, Catherine Todd, Eviana Norahmawati

Dr Montserrat Ros

No abstract provided.

Comparison Of Alamouti And Sts Implementations Using A Software Defined Radio Test Bed, Shinhan Wee, Montserrat B. Ros, Peter James Vial

Dr Montserrat Ros

A Software Defined Radio test bed using the Gnu Radio project was installed on Unix computers and modified so that estimates of the channel state coefficients were taken for a Multiple Input Multiple output (MIMO) system to take advantage of space time transmission at a frequency of 2.4GHz. Two MIMO techniques were implemented, one based on Alamouti and the other on Space Time Spreading. The technique used to estimate channel coefficients is described. The Bit Error Rate performance was compared, when using Binary Phase Shift Keying, between the two systems and it was found that the STS system performed better …

Mitagation Against Mai In A Space Time Spreading Software Defined Radio, Shinhan Wee, Montse Ros, Peter James Vial

Dr Montserrat Ros

A Software Defined Radio test bed using the Gnu Radio project was installed on Unix boxes and modified so that estimates of the channel state coefficients were taken for a Multiple Input Multiple output (MIMO) system to take advantage of space time transmission at a frqeuency of 2.4GHz. This system was modified to provide a Space Time Spreading test bed. The test bed was modified so that multiple access interference was experienced by off-setting different users data streams. The Walsh-Hadamard and Wysocki (low correlation) spreading sequences were deployed in the test bed to compare their Bit Error Rate performance. We …

A Wireless Sensor Node Architecture Using Remote Power Charging, For Interaction Applications, Matthew D'Souza, Konstanty Bialkowski, Adam Postula, Montserrat Ros

Dr Montserrat Ros

The wireless sensor node architecture proposed inthis paper is optimized for use in a wireless interactivepoint, listen and see system. In particular, we focus ondeveloping a wireless sensor node that can beremotely charged by harvesting microwave energy.The current system implementation allows a user toaccess information from a remote sensor via theirmobile computing device. These sensors are limited incomplexity due to the limited power available, and arecumbersome since manual intervention is required toreplace its batteries. We propose a system wherebattery powered wireless sensor nodes can berecharged by harvesting energy from a microwaveRadio Frequency (RF) signal source. The remotepower charging module of …

Morphological Characteristics Of Cervical Cells For Cervical Cancer Diagnosis, - Rahmadwati, Golshah Naghdy, Montserrat Ros, Catherine Todd

Dr Montserrat Ros

This paper investigates cervical cancer diagnosis based on the morphological characteristics of cervical cells. The developed algorithms cover several steps: pre-processing, image segmentation, nuclei and cytoplasm detection, feature calculation, and classification. The K-means clustering algorithm based on colour segmentation is used to segment cervical biopsy images into five regions: background, nuclei, red blood cell, stroma and cytoplasm. The morphological characteristics of cervical cells are used for feature extraction of cervical histopathology images. The cervical histopathology images are classified using four well known discriminatory features: 1) the ratio of nuclei to cytoplasm, 2) the diameter of nuclei, 3) the shape factor …

Preliminary Development Of An Inexpensive And Portable Network Monitoring Probe Using An Internet Embedded Microprocessor, Karthic Rajaram, Montse Ros, Peter James Vial

Dr Montserrat Ros

Management of a telecommunication network involves the requirement to monitor and manage devices on local and wide area networks (for optical, wired and wireless). Devices used to perform this function are referred to as Remote Monitoring devices or network probes. This paper investigates the prototyping of a network probe which uses an embedded internet microprocessor to collect and send data to a network monitor. The device uses the TINI Internet Interface developed by Dallas Semiconductor. This device was chosen as the ethernet driver has a promiscuous mode which potentially allows the capture of all packets sent on the ethernet connection …

Biometric Monitoring Of Footstep And Heart Rate Using Wireless Inertial Sensors, Montserrat Ros, Matthew D'Souza, Matthew Wallace

Dr Montserrat Ros

Inertial sensors are widely used for a variety of biomedicalapplications, such as human activity monitoring. We present awireless biomedical monitoring network used for measuringfootstep parameters and the heart rate of a person. The wirelessbiomedical monitoring network uses inertial sensors to recordand monitor heart rate and consists of multiple monitoringnodes placed on a person, that communicate with a base node.The monitoring nodes placed on a person&¿s ankle measure theacceleration generated during a footstep. By analysing thisdata, we are able to determine the average footstep length andwalking velocity to be 80cm and the average walking speed tobe 1m/s which corresponds to results …

On The Effect Of Multiple Access Interference In A Space Time Spreading Time Hopping Ppm Uwb System, Peter Vial, Beata Wysocki, Tadeusz Wysocki, Montserrat Ros, David Stirling

Dr Montserrat Ros

This study investigates the effect of multiple sources using STS across a Time-Hopping-PPM Modulation that is over an UWB Saleh-Valenzuela channel with each source using two transmit antennas. We model and analyze this system, showing that the presence of such MAI results in a significant degradation in BER performance. Simulation results show that for strong signal strength of interfering MAI signals degradation in BER performance is observed for the cases where we have five and 10 distinct MAI sources present when using Walsh-Hadamard thirty two chip spreading sequences. Using simulation, we investigate the use of other sets of orthogonal spreading …

Analysis Of Property-Preservation Capabilities Of The Rox And Esh Hash Domain Extenders, Reza Reyhanitabar, Willy Susilo, Yi Mu

Dr Reza Reyhanitabar

Two of the most recent and powerful multi-property preserving (MPP) hash domain extension transforms are the Ramdom-Oracle-XOR (ROX) transform and the Enveloped Shoup (ESh) transform. The former was proposed by Andreeva et al. at ASIACRYPT 2007 and the latter was proposed by Bellare and Ristenpart at ICALP 2007. In the existing literature, ten notions of security for hash functions have been considered in analysis of MPP capabilities of domain extension transforms, namely CR, Sec, aSec, eSec (TCR), Pre, aPre, ePre, MAC, PRF, PRO. Andreeva et al. showed that ROX is able to preserve seven properties; namely collision resistance (CR), three …

Fault Analysis Of The Katan Family Of Block Ciphers, Shekh Faisal Abdul-Latip, Mohammad Reza Reyhanitabar, Willy Susilo, Jennifer Seberry

Dr Reza Reyhanitabar

In this paper, we investigate security of the KATAN family of block ciphers against differential fault attacks. KATAN consists of three variants with 32, 48 and 64-bit block sizes, called KATAN32, KATAN48 and KATAN64, respectively. All three variants have the same key length of 80 bits. We assume a single-bit fault injection model where the adversary is supposed to be able to corrupt a single random bit of the internal state of the cipher and this fault induction process can be repeated (by resetting the cipher); i.e., the faults are transient rather than permanent. First, we show how to identify …

Extended Cubes: Enhancing The Cube Attack By Extracting Low-Degree Non-Linear Equations, Shekh Abdul-Latip, Reza Reyhanitabar, Willy Susilo, Jennifer Seberry

Dr Reza Reyhanitabar

In this paper, we propose an efficient method for extracting simple low-degree equations (e.g. quadratic ones) in addition to the linear ones, obtainable from the original cube attack by Dinur and Shamir at EUROCRYPT 2009. This extended cube attack can be successfully applied even to cryptosystems in which the original cube attack may fail due to the attacker's inability in finding sufficiently many independent linear equations. As an application of our extended method, we exhibit a side channel cube attack against the PRESENT block cipher using the Hamming weight leakage model. Our side channel attack improves upon the previous work …

On Capabilities Of Hash Domain Extenders To Preserve Enhanced Security Properties, Reza Reyhanitabar, Willy Susilo

Dr Reza Reyhanitabar

In this paper, we study property preservation capabilities of several domain extension transforms for hash functions with respect to multiple enhanced security notions. The transforms investigated include MD with strengthening padding (sMD), HAIFA, Enveloped Shoup (ESh) and Nested Linear Hash (nLH). While the first two transforms and their straightforward variants are among the most popular ones in practical hash designs including several SHA-3 candidates, the last two transforms (i.e. ESh and nLH) are mainly of a theoretical interest in the analysis of multi-property-preservation (MPP) capabilities of hash domain extenders. The security notions considered are the enhanced (or strengthened) variants of …

Some Benefits Of An Australian High Speed Rail Network , Philip Laird

Dr Philip Laird

High Speed Rail or HSR with electric passenger trains operating at speeds of 250km/h or more is now operational in 12 countries and is again under consideration in Australia. The paper outlines earlier HSR studies in Australia and Sydney airport issues. It briefly considers aviation fuel use on the 10 top routes of the Melbourne-Sydney and Sydney-Brisbane corridors (some 571 million litres in 2009) and conditionally quantifies the potential reduction of aviation fuel and greenhouse gas emissions that could result from the introduction of HSR in Australia. The paper includes some observations of the current debate in Britain whether to …

Sydney - Brisbane Land Transport, Philip G. Laird

Dr Philip Laird

This paper shall commence with reference to the draft AusLink Sydney - Brisbane corridor strategy. Section 2 will outline the upgrading of the Pacific Highway, Section 3 will examine the existing Sydney - Brisbane railway whilst Section 4 will outline some 2009 - 2014 corridor upgrade options with particular attention to external costs and energy use as opposed to intercity supply chain costs. The conclusions are given in Section 5. The current population of the coastal regions of the Sydney - Brisbane corridor exceeds 8 million. As shown by Table I, the population is expected to be approaching 11 million …

Revised Land Freight External Costs In Australia, Philip Laird

Dr Philip Laird

Publications in Australia to 1999 that comment on transport externalities include the former Inter-State Commission (ISC - 1990), the National Transport Planning Taskforce (NTPT - 1994) Victorian Environment Protection Authority (1994), Simpson and London (1995), Manins (1997), Brindle et al (1999), and the Bureau of Transport Economics (BTE - 1999). As noted by the ISC (1990, p89), road external costs are "…costs imposed outside market transactions and they fall on a number of individuals or groups - road users other than those individuals who give rise to the costs, individuals other than road users (such as those who live in …

Railways In Australia: Federation Unfulfilled , Philip Laird

Dr Philip Laird

No abstract provided.

Australian Freight Railways For A New Century, Philip G. Laird, Max Michell, Alex Stoney, Gabriella Adorni-Braccesi

Dr Philip Laird

No abstract provided.

Potential Reduction In Energy Use From A High Speed Rail Network In Australia, Philip Laird

Dr Philip Laird

High Speed Rail or HSR with electric passenger trains using steel wheels on steel rails with maximum operating speeds of 250km/h or more is now operational in 12 countries. It is now under review in Australia. The paper considers energy use on the 10 top routes of the Melbourne-Sydney and Sydney-Brisbane corridors and finds that HSR was in place by 2020, HSR could reduce the use of aviation fuel by over 450 million litres each year. External costs and Sydney airport issues are also noted.

Histological Changes In The Target Organs Of Channa Punctatus After Exposure To Anthraquinone Vat Dyes, Rajee Olaganathan, Jamila Patterson

Publications

The present study is an attempt on histopathology of gill, liver, kidney and intestine of Channa punctatus after exposure to sublethal concentrations of anthraquinone vat dyes viz., vat blue 4 and vat green 1. The dyes has been found to produce several damages in the vital organs of C. punctatus leading to various lesions like extensive lamellar hypertrophy with some proliferation at the base of secondary lamellae and hyperplasia of intercellular epithelial cells in the gill; fat accumulation, hepatic necrosis, aggregation of polymorphonuclear leucocytes, hepatocellular degeneration and aggregation of hepatocytes in liver; while in kidney it caused hyperplastic of the …

Object Oriented Implementation Of The Parallel Toolkit Library, Sandhya Vinnakota

Computer Science Graduate Projects and Theses

With manufacturing efficiencies and technological innovation the computing power of commodity machines has been increasing accompanied by decreasing costs. With the very favorable price/performance ratio the computing community has shifted from monolithic machines to networked machines.

This has created the need for software to manage the parallelism of the network. One such work has been the Parallel Toolkit Library. The Parallel Toolkit Library provides support for common design functionalities used throughout parallel programs.

This work extends the PTK C library for C++ parallel programs. The motivation for the current project stems from the need to let parallel programs reap the …

An Examination Of Physical And Empirical Approaches In Forecasting Nonconvective Wind Gusts, Jeramie Lippman

Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research

Nonconvective winds can be a dangerous and costly weather hazard. For example, over a ten year span from 2002 to 2011, there were over 200 fatalities and nearly 1,000 injuries, as well as over 6.4 billion dollars in monetary losses due to high, nonconvective winds. An important subset to nonconvective winds is the nonconvective wind gust. When winds are already relatively strong, a sudden wind gust can magnify already existing hazards. Three different methods were evaluated to determine if either of two physically based algorithms can outperform an empirical algorithm. The two physically based methods were the Wind Gust Estimate …

Interactions Of Zooplankton And Phytoplankton With Cyanobacteria, Rebecca Alexander

School of Natural Resources: Dissertations, Theses, and Student Research

Cyanobacteria are a major concern in Nebraska reservoirs and are capable of producing toxins that can cause skin irritations and gastrointestinal problems, as well as affect the nervous system. It is important to determine the mechanisms that can cause cyanobacteria blooms due to the effect they can have on human health. The interaction of zooplankton and other phytoplankton groups with cyanobacteria is important because there is a biological component in surface waters that should be taken into consideration along with the physical and chemical parameters that have been noted to promote cyanobacteria. For example, zooplankton have the ability to alter …

The Use Of Tree Rings To Study The Impacts Of Stream Flow And Climate Variability On Native And Invasive Woody Species Along A Semi-Arid Riparian Ecosystem In The Great Plains, Usa., Kristen M. Skolaut

School of Natural Resources: Dissertations, Theses, and Student Research

Forested riparian areas of the Northern Great Plains have historically been dominated by the native Populus deltoides L. vegetation type. Changes in climate, stream flow, groundwater, and management practices in the past few decades have promoted the expansion of the upland native woody species Juniperus virginiana L. and the invasion of the non-native Elaeagnus angustifolia L. into these riparian ecosystems. This study aims at using dendrochronology, or the study of tree rings, to assess the impacts of intra- and inter- annual climatic variability and stream flow over the past decades, on the annual tree ring growth, oxygen and carbon isotopic …

Interactions Of Zoo Plankton And Phytoplankton With Cyanobacteria, Rebecca J. Alexander

School of Natural Resources: Dissertations, Theses, and Student Research

Cyanobacteria are a major concern in Nebraska reservoirs and are capable of producing toxins that can cause skin irritations and gastrointestinal problems, as well as affect the nervous system. It is important to determine the mechanisms that can cause cyanobacteria blooms due to the effect they can have on human health. The interaction of zooplankton and other phytoplankton groups with cyanobacteria is important because there is a biological component in surface waters that should be taken into consideration along with the physical and chemical parameters that have been noted to promote cyanobacteria. For example, zooplankton have the ability to alter …

Charge, Bonding, And Magneto-Elastic Coupling In Nanomaterials, Qi Sun

Doctoral Dissertations

Phonons are exquisitely sensitive to finite length scale effects in a wide variety of materials because they are intimately connected to charge, structure, and magnetism, and a quantitative analysis of their behavior can reveal microscopic aspects of chemical bonding and spin-phonon coupling. To investigate these effects, we measured infrared vibrational properties of bulk and nanoscale MoS₂ [molybdenum disulfide], MnO [manganese(II) oxide], and CoFe₂O₄ [cobalt iron oxide]. From an analysis of frequencies, oscillator strengths, and high-frequency dielectric constants, we extracted Born and local effective charges, and polarizability for MoS₂ and MnO. For MoS₂ nanoparticles, in …

Local Residents' Experience Of The Coal Ash Spill In Kingston, Tennessee: A Phenomenological Study, Amy Lynn Mathis

Doctoral Dissertations

On December 22, 2008, near Kingston, Tennessee, a Tennessee Valley Authority (TVA) retention pond holding approximately 1.7 million cubic yards of coal fly ash failed, spilling the ash into the nearby Emory River and inundating farms and homes in the Swan Pond community. As a result more than 100 people were permanently displaced from their homes and the clean-up effort is ongoing.

The purpose of this study was to explore the experience of living near Kingston, Tennessee, in the aftermath of the spill. Using existential phenomenology as the guiding research methodology, I interviewed 9 participants from the area and asked …

Condensed Matter From Gauge/Gravity Duality, Jason Edward Therrien

Doctoral Dissertations

Currently strongly coupled systems present the greatest challenge to theoretical physics. For years conventional methods of approach have failed to describe these systems analytically. In recent years it has been shown that there is a duality between weakly coupled and strongly coupled systems, the Gauge Theory/Gravity Duality. In this dissertation I will discuss how the AdS/CFT is used to describe strongly coupled condensed matter systems as well as present the work done by the author and collaborators.