Digital Commons Network^™

Exploration And Implementation Of Innovative Efficiencies/Devices In Beet Processing For Energy Production, Patrick Mcinerney

Theses

The imminent depletion of fossil fuels, as well as concerns for energy security and the obligation to respond to climate change has led to expanding worldwide popularity of Anaerobic Digestion (AD) of energy crops. Sugar beet is a popular AD feedstock due to its favourable characteristics; however it can be quite labour intensive requiring a range of specialist equipment to process the crop prior to undergoing AD. A crucial stage of this process involves the size reduction of beet by a mechanical chopper unit; this pretreatment breaks open the cellulose structure of the crop and increases the surface area available …

Exercising Independently And Exercising Independence: A Phenomenological Study Of Physical Activity And Choice Among Adults With An Intellectual Disability, Sheila O'Sullivan

Theses

Aim/Background: This study examines how adults with intellectual disabilities choose the physical activities they engage in, inside and outside of the day service they attend. Of particular relevance are the benefits derived from physical activity which promotes wellbeing, inclusivity, new opportunities and social acceptance for people with intellectual disability. This is timely in light of current policy with regard to New Directions 2012-2016 which is directed towards moving people with ID from congregated to community settings and the enactment of the recent Assisted Decision Making (Capacity) Act (2015) which supports decision-making for all citizens.

Methodology: The study used phenomenological analysis …

Biogas From Slaughterhouse Waste In Ireland: Assessment Of Potential Energy Recovery Pathways, Aidan Ware

Theses

This study was undertaken to investigate the potential energy recovery from the anaerobic digestion (AD) of slaughterhouse wastes in Ireland. The research was approached in two ways; laboratory scale evaluation of methane production of the industrial waste streams from cattle, pig and chicken slaughtering facilities and a life cycle assessment (LCA) and energy balance to assess the potential utilisation pathways. This thesis includes; the evaluation of the potential biogas production from individual and combined slaughterhouse waste streams in Ireland on an equal footing through standardised laboratory testing, the effects of mandatory pre-treatments on the AD of slaughterhouse waste streams and …

A Plastic Encapsulated Wireless Sensor Module For Monitoring Of Medical Steam Sterilisers, Jinto George

Theses

Steam sterilisation is a process of removing or killing living organisms from medical equipment using saturated steam in a steriliser at 134°C and 3 bar pressure. Monitoring of the steriliser is very important to verify whether the sterilisation cycle is adequate or not. In current practice, hospitals widely use chemical or biological indicators for monitoring the performance of the sterilisation cycle but these are simple pass/fail monitors and do not allow continuous monitoring. This thesis presents design and development of a real time wireless sensing module (WSM) for monitoring the sterilisation cycle which can be used to replace existing chemical …

Intrinsic Inter-Subject Variability In Functional Neuroimaging: Verification Using Blind Source Separation Features, Shruti Gopal Vij

Theses

The holy grail of brain imaging is the identification of a biomarker, which can identify an abnormality that can be used to diagnose disease and track the effectiveness of treatment and disease progression. Typically approaches that search for biomarkers start by identifying mean differences between groups of patients and healthy controls. However, combining data from different subjects and groups to be able to make meaningful inferences is not trivial. The structure of the brain in each individual is unique in size and shape as well as in the relative location of anatomical landmarks (e.g. sulci and gyri). When looking for …

Identifying The Potential Environmental Impacts Of Engineered Nanomaterials, Therese Garvey

Theses

Engineered Nanomaterials (ENMs) are increasingly manufactured and incorporated into a diverse array of consumer products and industrial uses. While ENMs are touted for their technological and efficiency benefits, the potential impacts of increasing emissions and exposures to ENMs are poorly understood. This dissertation takes a critical look at the current knowledge in impact assessment of nanomaterials. First, the current metrics for impact assessment of traditional methods are compared with the proposed set of metrics necessary for nanomaterial impact assessment. Next, in order to understand the potential environmental impacts in context, characterization factors for four case study nanomaterials are modeled using …

The Effects Of Maturational Variation On The Performance Of Young Australian Footballers And Their Selection Into The Australian Football League's Talent Pathway, Ashley Cripps

Theses

Traditional player development pathways share a common goal, to identify and accelerate the development of talented adolescent players for senior competition. Players who gain selection into development programs gain greater access to experienced coaches, training facilities, support staff and competition. However, despite such advantages, research has shown that few players who gain initial selection into development pathways progress into professional senior competition. A major factor which potentially contributes to poor player retention in development pathways is the initial misidentification of talented athletes due to variations in biological maturity.

Earlier maturing individuals have been shown to be at a physical advantage …

The Material Forms Of Memory: A Creative Arts Praxis Examining Family Archive Materiality And The Performance Of Memory Through Installation Art, Emily M. M. Hornum

Theses

This Master of Arts by Research investigates the role of new media in influencing familyarchive materiality and what effect this has on the performance of memory. The aim is to examine through creative arts praxis how installation art illuminates the participatory engagement of family archive materiality to mediate our mnemonic processes. The source materials for this project stem from my family archives dating from the early 1900s to 2013, and include photographs, 35mm slides, VHS tapes, audiotapes and personal items. The significance of this research lies in the creative outcomes that have occurred through the investigative and critical dialogues between …

Early Life Events And Motor Development: A Longitudinal Study, Tegan Grace

Theses

Longitudinal studies are important to fully understand the processes of neurological development during gestation and how risk factors present during this time impact motor development outcomes, yet few to date have focused on this critical time period.

The purpose of this study was to identify modifiable risk factors influencing motor development during the prenatal period. Of particular interest was finding out whether these risk factors differed between the sexes.

Participants (N=2900) were from the Western Australian Pregnancy Cohort (Raine) Study. The Raine Study began in May 1989 and women were recruited between 16-20 weeks gestation (m = 18 weeks) from …

Towards The Identification Of Metabolite Markers Of Nipple Pain And Inflammation In Human Milk, Erin Fee

Theses

Background: Human milk is considered the best source of nutrition for all newborns as it contains important growth, developmental and immunological factors. The WHO (2003) recommends exclusive breastfeeding for the first six months of age, with complementary breastfeeding up to two years and beyond. However, some women experience complications of the breast that lead to early cessation of breastfeeding, which can adversely affect the well being of the developing infant and her own health.

Nipple pain is the most commonly cited reason for weaning in the first week postpartum. Nipple pain is also linked to mastitis from milk stasis and …

Dna Methylation Biomarkers For Esophageal Adenocarcinoma And Precursor Disease, Melissa L. Thomas

Theses

Esophageal adenocarcinoma has one of the poorest outcomes of all solid tumors, attributable, at least in part, to lack of an early stage diagnostic test. Aberrant methylation is an early and frequent event in carcinogenesis providing an opportunity for early cancer detection. The overall aim of this thesis is to identify and validate regions of aberrant methylation as a biomarker for early detection of esophageal adenocarcinoma and the dysplastic stages of its precursor disease, Barrett’s esophagus. By using well-classified patient data and stringent, quality controlled biospecimen selection for training and validation cohorts, I found regions of diseaseassociated aberrant methylation that …

An Implementation Of A High Accuracy Sensor For Distributed Wireless Sensor Network Applications, Jesse Craig Frye

Theses

Biopotentials are typically small electric signals, on the order of a few microvolts to hundreds of millivolts, produced as the result of cellular electrochemical activity in living organisms. Due to high source impedance, investigation of these small electrical signals typically requires use of clinical equipment or professional data acquisition systems that are large, expensive, and utilize AC mains power. Distributed sensor network applications need a low cost, high resolution wireless sensor, suitable for measuring and logging microvolt-level DC accurate signals from high impedance sources. Issues that must be addressed include processing power, power efficiency, auxiliary data storage, and wireless communication …

Performance Of Feature Selection Methods For Machine Learning Based Automatic Malarial Cell Recognition In Wholeslide Images, Vishnu Muralidharan.

Theses

This work is on investigation of automated detection of malaria parasites in wholeslide images of peripheral blood smears. We compared and analyzed several feature-selection methods for optimization of machine learning using support vector machine (SVM). To this end, cell samples were extracted from the wholeslide image and feature extraction was performed on these samples. In order to identify the best features, a host of feature selection methods were tested. For each set of selected features, the SVM was trained and tuned for optimal model selection using cross-validation and grid-search. Subsequently, test samples were classified using the model. Each feature selection …

Animals And Sovereignty : The Politization Of Bodies In The Avowyng Of Arthur And Yonec, Sarah Moore

Theses

In The Avowyng of Arthur, the King brings back to Carlisle “Bothe the birde and the brede” (491), a reference to the boar he slew and the lady his knights won in the forest. This conjunction of woman and meat on a single line illustrates the political tension in the text between what it is to be human and conversely, what it is to be animal. In addition, in Yonec the knight Muldumarec repeatedly transforms into a hawk, blurring the biological boundaries between animal and human. Although critics have frequently attended to the symbolic roles animals play in both these …

The Effectiveness Of Different Silane Formulations To Functionalize Glass-Based Substrates, Aniket Maharanwar

Theses

The research in this report is being undertaken to compare the integrity of different methods to coat glass-based substrates with silanes. A typical borosilicate glass, APEXTM glass, was cleaned using a wet cleaning method and quartz substrates was cleaned using dry cleaning methods. The substrates were functionalized with a long-chain silane aminopropyltrimethoxysilane-(APTES), a short-chain chlorotrimethylsilane (Si (CH3)3 Cl) (CTMS), and commercial SigmacoteTM. The concentration of the silane in solution was varied at constant immersion times. The glass substrates functionalized with CTMS, Sigmacote and APTES were immersed in DI water to test their stability. The CTMS and Sigmacote produced water stable …

High Borate Glasses For The Controlled Release Of Therapeutic Metal Ions, Kathleen O'Connell

Theses

Within the biomaterial community significant effort has been directed towards engineering materials that induce precise host responses, which are tailored to specific applications. However, this has also seen an increase in the complexity of some biomaterials, which is being increasingly criticised within the literature, as it is attributed to hindering their clinical utility. In this context the release of therapeutic metal ions from glass-based biomaterials have been shown to promote hard tissue repair and regeneration through angiogenesis and osteogenesis processes. Within this thesis project two separate quaternary high borate glass systems were prepared containing the therapeutic metal ions strontium and …

Clinical Coagulase-Negative Staphylococci; Identification, Characterisation And Treatment, Emma Gabriel

Theses

The work presented in this thesis focuses on clinically significant staphylococci (with an emphasis on coagulase-negative staphylococci) in terms of their isolation, identification, characterisation, and biocontrol.

CoNS are increasingly being recognised as true nosocomial pathogens yet remain under-characterised, particularly from an Irish clinical perspective. We examined a large cohort of clinically-derived CoNS, isolated from blood (n=l35), identifying them to species level. Extensive antibiotic resistance against nine clinically-relevant antibiotics was recorded. Additionally, widespread biofilm forming capabilities associated with increased virulence was detected both phenotypically and genotypically. We identified multiple species of CoNS in circulation in an Irish healthcare setting, and determined …

Low-Cost Fabrication Of Nanoelectrodes For Electrochemical Applications, Colm Barrett

Theses

Compared to traditional macroelectrodes, nanoscale electrodes have tremendous potential when employed in electrochemistry due to enhanced sensitivity arising from increased mass transport to the electrode and low background charging currents. Electrochemically- based diagnostic products such as sensors require sensing elements with greatly enhanced performance and nanoelectrodes offer a viable route to attaining this performance improvement.

Firstly, the fabrication of a polymer microneedle array-based sensor is described and employed to demonstrate a mediated approach for the detection of glucose in solution. This was to demonstrate the feasibility of the system for in-vivo sensing. Cyclic voltammetry was used to achieve detection of …

Development Of Nanoelectrodes For Electrochemical Applications, Séan Barry

Theses

The demand for direct, selective and rapid determination of chemical and biological analytes has led to a growing interest in electrochemical sensor devices. Particularly the use of nanomaterials and nanoelectrodes has received increased interest due to their enhanced electrochemical properties. In this thesis these enhanced properties are exploited in order to develop multiple sensing applications.

Firstly a sensitive microband based sensor is described for the detection of trinitrotoluene and for its discrimination from other nitroaromatic compounds. Square wave voltammetry was used to identify characteristic reduction peaks for these compounds and a calibration plot for the quantification of TNT was also …

Suspended Sediment And Nutrient Concentrations And Loads In Two Irish Rivers, Sean T. Harrington

Theses

This thesis presents the results of new and original research on suspended sediment (SS) and nutrient concentrations and loads on the Rivers Bandon and Owenabue in the south of Ireland. It addresses the knowledge gap in SS and nutrient concentration data and in particular SS load/yield estimation methods. A comprehensive database of SS and nutrient concentrations has been established. An investigation into the relationship between water discharge and sediment and nutrient transport is presented and new original relationships between turbidity and suspended sediment concentration (SSC) and nutrients are developed. Turbidity-based suspended sediment loads (SSL) are estimated from the continuous turbidity …

An Investigation Into Improving Men's Access To Health Services, Kieran Geary

Theses

This thesis sets out to examine the area of men’s health and to recommend strategies for mainstream health services to get more men interested in their health. In Ireland, men die, on average, approximately five years younger than women and have higher death rates than women for most of the leading causes of death (Richardson and Carroll, 2008). As Wilkins (2009) points out, identifying the problems with men’s health is not the ultimate challenge, nor is advocating for change at a political or policy level, rather it is identifying what works with men and translating that into workable strategies capable …

Developing An Algal Biofilm Filtration System For The Remediation Of Nutrient Pollution In Freshwater Ponds, Danielle Delp

Theses

Anthropogenic nutrient pollution is one of the most serious threats facing aquatic systems in modern times. Pollution with compounds containing nitrogen and phosphorous encourages rapid development of autotrophic biomass, or blooms, that severely degrade the quality of an aquatic system both as a habitat for organisms and as a water resource for human use. In freshwater ponds, the widespread need for treatment of nutrient pollution and resulting blooms has resulted in the growth of a large industry dedicated to pond management and maintenance. These companies utilize a variety of chemical and non-chemical treatments to prevent the growth of blooms or …

Monitoring Cloud-Prone Complex Landscapes At Multiple Spatial Scales Using Medium And High Resolution Optical Data: A Case Study In Central Africa, Bikash Basnet

Theses

Tracking land surface dynamics over cloud-prone areas with complex mountainous terrain and a landscape that is heterogeneous at a scale of approximately 10 m, is an important challenge in the remote sensing of tropical regions in developing nations, due to the small plot sizes. Persistent monitoring of natural resources in these regions at multiple spatial scales requires development of tools to identify emerging land cover transformation due to anthropogenic causes, such as agricultural expansion and climate change. Along with the cloud cover and obstructions by topographic distortions due to steep terrain, there are limitations to the accuracy of monitoring change …

Environmental And Density-Dependent Modulation Of Type Iii Secretion System Genes In Pseudomonas Syringae Pv. Tomato Dc3000, Jennifer Louise Stauber

Theses

Pseudomonas syringae pathovar tomato strain DC3000 is a model bacterial plant-pathogen that utilizes a dedicated protein export apparatus, the type III secretion system (T3SS), to translocate virulence proteins called effectors directly into host cells. Because effectors suppress plant immune responses, activation of the T3SS is critical upon entry into the host. The P. syringae T3SS is controlled by the hrpRS-hrpL regulatory cascade, and is activated quickly by specific conditions. Different environmental stimuli have been reported to modulate T3SS gene expression in culture, however it is unclear how each signal affects hrpRS or hrpL. My objective was to identify how environmental …

Numerical Investigation Of Parameters Impacting The Wall Thickness Of Carbon Nanotubes Manufactured By Template-Based Chemical Vapor Deposition, Yashar Seyed Vahedein

Theses

Template-based chemical vapor deposition (TB-CVD) is a versatile technique for manufacturing carbon nanotubes (CNTs) or CNT-based devices for various applications. In this process, carbon is deposited by thermal decomposition of a carbon-based precursor gas inside the nanoscopic cylindrical pores of anodized aluminum oxide (AAO) templates to form CNTs. Experimental results show CNT formation in templates is controlled by TB-CVD process parameters, such as time, temperature and flow rate. Optimization of this process is done empirically, requiring tremendous time and effort. Moreover, there is a need for a more comprehensive and low cost way to characterize the flow in the furnace …

The Use Of Landsat 8 For Monitoring Of Fresh And Coastal Waters, Javier A. Concha

Theses

The most interaction between humankind and water occurs in coastal and inland waters (Case 2 waters) at a scale of tens or hundred of meters, but there is not yet an ocean color product (e.g. chlorophyll-a product) at this spatial scale. Landsat 8 could potentially address the remote sensing of these kinds of waters due to its improved features. This work presents an approach to obtain the color producing agents (CPAs) chlorophyll-a, colored dissolved organic material (CDOM) and suspended material (SM) from water bodies using Landsat 8. Adequate atmospheric correction becomes an important first step to accurately retrieving water parameters …

Biodiversity And The Role Of Bioturbating Invertebrates In Nutrient Cycling In Stormwater Ponds, Kerry Lee Kuntz

Theses

Stormwater retention ponds are typically constructed to manage stormwater in commercial and residential areas, thereby reducing flooding and erosion and improving downstream water quality. Although auxiliary ecosystem services of stormwater ponds are less often recognized, these small aquatic ecosystems may also serve as habitat for aquatic flora and fauna and can be hotspots for biogeochemical cycling. This study examined the biological communities and physicochemical environment of 9 stormwater ponds in Rochester, New York, USA to assess their role in supporting biodiversity and facilitating carbon and nutrient cycling in developed landscapes. A field study revealed that pond age and vegetation cover …

A Generalized Model Of Cognitive Workload, Taylor Carpenter

Theses

Numerous catastrophic accidents have been the result of human operators making poor judgement calls stemming from suboptimal decision making. This suboptimal decision making, in many cases, arises when an operator is either in a high cognitive workload state, overwhelmed with information leading to a greater chance of missing an important detail, or in a low cognitive workload state, distracted and overall not paying attention to the task at hand. If the cognitive workload of an individual can be properly monitored, suboptimal operator conditions can be recognized or prevented, reducing the chance of an accident. While previous research has led to …

Effect Of Simulated Canopy Cover On Created Vernal Pools In The Northeastern Us, Elizabeth Anne Bruen

Theses

Vernal pools in the Northeastern United States are small, forested wetlands characterized by ephemeral flooding. These unique ecosystems provide critical habitat for both terrestrial and aquatic organisms, abate seasonal flooding, and are biogeochemical hotspots. Vernal pools may be created to maintain key ecosystem services associated with loss of natural wetlands. In many instances, however, created pools do not mimic the ecological functions and services of extant vernal pools due to shortcomings associated with the surrounding land use and canopy cover, hydrology, or invasion by opportunistic plants. Because of the importance of these systems to regional biodiversity, understanding the conditions required …

Aflatoxin Level In Selected Spices In Abu Dhabi Markets, Salma Ibrahim Al Hammadi

Theses

Aflatoxins (AF) are toxic secondary metabolites secreted by the fungi Aspergillus or Penicillium. Four aflatoxins (AFB1, AFB2, AFG1 and AFG2) are common in foods and feeds produced or stored under unfavorable conditions of humidity and temperature AFB1 is considered the most toxic.

Spices are significant ingredients in the UAE cuisine, used for the purpose of seasoning, coloring, and flavoring. In this research, 94 samples of spices (including pepper, chili, coriander, fennel seeds, paprika, turmeric, zataria, and mixed spices) purchased from different markets in the Emirate of Abu Dhabi, were analyzed for their contents of AF. Sample were analyzed using high-performance …