Digital Commons Network^™

Variation In Mainland Northwest Territories Late-Winter Muskox (Ovibos Moschatus) Density Estimations And Habitat Associations Above And Below Treeline., Charlotte Rentmeister

Theses and Dissertations (Comprehensive)

The Arctic and Sub-Arctic ecosystems are seeing accelerated changes in temperature, landcover, and consequently species abundance and distributions. Reliable distributions, and associated population density estimates, are essential for effective conservation and management efforts. Growing concerns from northern communities regarding the relationship between muskox and declining caribou populations strengthens the need for updated information on muskox populations within mainland Northwest Territories (NWT). The first objective for my research was to quantify and map updated winter estimates of abundance, density, and distribution of muskoxen within three recent survey regions located in mainland NWT, using a multiple covariate distance sampling method (MCDS), paired …

Geochemistry Of Rare Earth Elements In Simulated Natural Waters: Experiments And Modelling Of Precipitation, Complexation, And Bioavailability., Samantha Zulian

Theses and Dissertations (Comprehensive)

Rare earth elements (REEs) are an important part of modern technology and used for many applications. Mining, agriculture, improper recycling and medical applications can increase the concentration of these elements in surface waters. Metals in the environment including REEs can be found naturally but understanding the implications increase concentrations from anthropogenic inputs is important. REE mobility, persistence and toxicity is imperative to risk assessment as Canada begins to mine REE. Ultimately, as with other metals, the impacts of REEs in the environment should be dependent on the specific physical and chemical forms of the elements. Fractionation provides a practical method …

Coordination Chemistry Using Strategic Design Of Ligands For Switchable Properties, Delara Joekar

Theses and Dissertations (Comprehensive)

Coordination-driven self-assemblies are multifunctional molecular systems that provide an efficient method for miniaturization towards functional devices with diverse applications. Herein, the synthesis of novel pyrazole-based ligands suitable for construction of coordination assemblies is reported. These were designed using a strategy that incorporates the presence of both cationic and anionic coordination sites, and a third site for further functionalization. This design strategy has been used because there is still a knowledge gap for controlling the directionality of weak molecular forces in the presence of stronger competing forces. The structural characterization of these ligands, their Hirshfeld surface analysis, and select coordination complexes …

Investigating The Use Of Voluntary Furloughs To Reduce Labour Costs: The Effect On Employee Effort, Kelsey Matthews

Theses and Dissertations (Comprehensive)

To quickly reduce costs in response to external shocks, firms often implement voluntary furloughs. In a voluntary furlough, employees decide whether to accept a reduction in their pay with a corresponding reduction in work hours. Despite the prevalence of voluntary furloughs in practice, it remains an empirical question how employees will respond to this cost reduction practice. The purpose of my dissertation is to investigate how the implementation of a voluntary furlough affects the subsequent effort of employees who volunteer and those who do not volunteer for a furlough.

I address my research question using two experiments where I manipulate …

Understanding The Significance Of Object Recognition In Cowbirds: Exploring The Interplay Of Cognition, Social Behaviour And Reproductive Success, Eric Rushton

Theses and Dissertations (Comprehensive)

Every day, animals use cognitive processes to make decisions in their environment such as those regarding food sources, threats and mates. One such important process provides the ability to recognize objects and individuals in order to guide future actions. Since object recognition and individual recognition are related processes, they may be linked to social cognition and to fitness; links not commonly explored in the literature. In this thesis I seek to examine (1) how brown-headed cowbirds (Molothrus ater) attend to and react to novel objects in their environment and (2) how this ability to recognize objects is related …

Impacts Of Environmental Stressors On Mummichog (Fundulus Heteroclitus) Growth And The Gh-Igf1 Pathway Using A Laboratory Bioassay, Olena Kuntyj

Theses and Dissertations (Comprehensive)

Using a flow-through laboratory bioassay, experiments investigated the effects of limited feeding, increased temperature, ammonium chloride (NH₄Cl), and 17α-ethinylestradiol (EE₂) on juvenile mummichog (Fundulus heteroclitus) growth. Weight measurements were taken every three days as the apical growth endpoint. Gene expression was examined by qPCR for genes in the GH (growth hormone)-IGF1 (insulin-like growth factor 1) pathway, including gh, igf1, and their receptors (ghra, ghrb, igf1ra, igf1rb). In Experiment 1, juvenile mummichog were exposed to excess or limited feed for 21 days. The limited-fed mummichog weighed less, were …

Assessing Stormwater Management Pond Water Quality, Function, And The Potential Biotic Effects To Receiving Waters, Mitchell Elstone

Theses and Dissertations (Comprehensive)

The use of stormwater management ponds (SWMPs) has been increasing over the past five decades. However, an in-depth understanding of the daily performance of SWMPs and functionality during cold periods is limited. This is in part because mandated monitoring is relatively infrequent, and the assumption that SWMPs are inactive between storm events and during the winter. The goals of this research were to better understand daily stormwater (SW) characteristics, the performance of SWMPs based on current forms of evaluation and assess the potential for SWMP effluent to impact downstream biota. Influent and effluent samples from two SWMPs were collected daily …

Impacts Of Wildfire On Subcanopy Energy Balance, Thermal Regime, And Permafrost Stability In Peat Plateaus At Scotty Creek, Canada, Maude Auclair

Theses and Dissertations (Comprehensive)

The stability of permafrost in peatland-dominated regions of northwestern Canada is compromised by ongoing climate warming and increased wildfire activity. This study examines an 8-year record of changes to the surface and subsurface properties of a peat plateau following a low-severity wildfire that occurred in 2014 in a region of thawing, discontinuous permafrost. This is accomplished by comparing the burned portion of a peat plateau to two unburned control sites, one of which is the unburned portion of the same plateau that was affected by the fire. Net radiation was not significantly different one year following the wildfire but became …

Developing A Transformer-Based Sleep Apnea Diagnostic Model: Addressing Multi-Dimensional Time Series Challenges In Polysomnography, Laith Adi

Theses and Dissertations (Comprehensive)

Sleep apnea is a prevalent and potentially serious sleep disorder, affecting 1% to 6% of children and adolescents [1]. Early and accurate diagnosis is critical, as untreated sleep apnea can lead to severe health complications, including cardiovascular problems and developmental issues. Traditional diagnostic methods often rely on manual analysis of polysomnography (PSG) data, which can be time-consuming and require specialized expertise. This thesis explores the use of Fourier transforms, differencing, and other phys- iological signal processing techniques to develop a transformer-based diagnostic model from scratch, utilizing multi-dimensional time series data from PSG. Our research distin- guishes itself by not only …

Investigating The Role Of The Mammalian Dsrnai Pathway In Preventing Infection By Respiratory Syncytial Virus And Human Coronavirus, Iliana Portelli

Theses and Dissertations (Comprehensive)

dsRNA interference (dsRNAi) is an antiviral innate immune response that uses long dsRNA (>40bp) to inhibit gene expression through the RNA interference (RNAi) pathway. dsRNAi is an important antiviral defense mechanism in plants, invertebrates, and fungi. However, its use as an antiviral mechanism in vertebrates is not well understood. Evidence proving the significance of dsRNAi in vertebrate cells does exist, but there is still a lack of research in this area, particularly with the use of long dsRNA. Respiratory Syncytial Virus (RSV) and human coronaviruses (HCoVs) are two single stranded RNA (ssRNA) viruses that infect airway cells. This study …

Queer Liberation In Young Adult Fantasy: An Analysis Of Rainbow Islands, Sydney Brouillard-Coyle

Theses and Dissertations (Comprehensive)

The purpose of this study was to explore how the theme of queer liberation can be represented in young adult fantasy novels. I conducted an in-depth analysis of the novel Rainbow Islands (Devin Harnois) utilizing the lenses of queer, transgender, intersectional, and narrative theory. In the novel Rainbow Islands, Harnois presents a utopia in which queer people are able to counter their oppressive realities by building systems of community that support one another; yet, the novel ends up replicating systems of oppression. Thus, Rainbow Islands offers a complex opportunity for analysis when considering the theme of queer liberation and how …

Assessing Indoor Temperature Control Using Different Materials And Designs, Amany G. Micheal Prof.

Architectural Engineering

Controlling indoor temperature in buildings is gaining much importance. This is attributed to the increasing awareness around the world of the mandate reduction in fossil fuel consumption to produce electricity necessary to control temperature inside buildings. This research studies the potential to improve the indoor environment of buildings using different materials either insulators or incorporated inside a building and façade design. The study involves phase changing materials (PCM), thermal insulation materials and façade shading and design. Thermal insulation materials include mineral wool and polystyrene boards, which are the most popular insulators in arid countries. Wood cladding influence on the indoor …

Enhancing The Mechanical Properties Of Green Concrete Blocks Mixture, Amany G. Micheal Prof., Tuka Fahmy El Ghazaly Arch., Rania Rushdy Moussa Dr.

Architectural Engineering

Concrete is a very abundant building material and flexible in construction. Yet cement is the main material used in concrete mixture, which consumed a lot of energy and money. Cement is a very un-eco-friendly material when it comes to production and is a main contributor to global warming. On the other hand, Polymers can be toxic to people, fauna, and flora. In the last century, Egyptian citizens complained that the waste has increased, and the inappropriate waste disposal effect the Egyptian health and quality of life. The alternative is to burn the polymers; however, it will produce toxic emissions that …

Experimental Investigation On Properties Of Sugarcane Bagasse Fiberboard Manufactured With Different Techniques, Amany G. Micheal Prof., Marianne Nabil Girgis Ass. Prof., Omar Mohasen Khalaf Eng.

Architectural Engineering

Within an ongoing research project investigating the use of sugarcane bagasse (SCB) to develop different building materials, this article adopts an experimental approach to determine the effect of the manufacturing technique on proposed composite fiberboards. Two different prototypes of composite fiberboards are developed using (SCB) as a natural fiber, and different matrices are tested. The epoxy resin and polyester resin are used as the alternative matrices. Fiberboards are proposed to be used as cladding boards or as internal furnishing units material instead of using MDF or HDF that exploit the usage of natural soft or hard wood that is unrecyclable, …

Managing Design Changes Through Integrating Concurrent Engineering Into The Architectural Design Process, Ayman Ahmed Ezzat Othman, Mariam Sherif Ali

Architectural Engineering

This research aims to investigate the role of concurrent engineering (CE) towards managing design changes (DCs) during the architectural design process (ADP). To achieve this aim, a mixed research approach combining qualitative and quantitative methods was designed to accomplish four objectives. Firstly, the literature review investigated ADP, causes and impacts of DCs and CE. Secondly, three case studies of construction projects from Finland, China and Indonesia were collected and analysed to validate the identified causes and impacts of DCs and examine the role of CE towards managing DCs during ADP. Thirdly, a survey questionnaire was conducted with a representative sample …

A 4-Dimensional Strategy For Managing Construction Waste Originating During The Design Process Within Architectural Design Firms In Egypt, Ayman Ahmed Ezzat Othman, Aya Said Muawad Saad

Architectural Engineering

This study aims to develop and validate a comprehensive strategy consisting of four dimensions for effectively managing construction waste (CW) arising during the Architectural Design Process (ADP) within Architectural Design Firms (ADFs) in Egypt. To accomplish this aim, a hybrid research approach, integrating qualitative and quantitative methods, was designed to address four specific objectives. Firstly, a thorough literature review was conducted to explore the topics of ADP, CW, Waste Management (WM), as well as national and international Waste Management Strategies (WMS). Secondly, three construction-based case studies from Saudi Arabia, China, and Thailand were gathered and analyzed to investigate the efficacy …

A Strategy For Reducing Construction Waste Generated During The Design Process In Architectural Design Firms In Egypt, Ayman Ahmed Ezzat Othman, Aya Said Saad

Architectural Engineering

Purpose – This paper aims to develop and validate a strategy for reducing construction waste (CW) generated during the design process (DP) in architectural design firms (ADFs) in Egypt. Design/methodology/approach – Qualitative and quantitative research methodology was designed to accomplish four objectives. The literature review investigated DP, CW, waste management (WM) and WM strategies (WMS). Three case studies were analysed to investigate the role of WMS towards reducing CW during DP. A survey questionnaire was conducted with a representative sample of ADFs in Egypt to assess their perception and application of WMS during DP. Lastly, a strategy was developed and …

A Lean Management Framework For Achieving Sustainability Through Reducing Risks During The Design Process, Ayman Ahmed Ezzat Othman, Sherouk Mohamed Abdelrahim

Architectural Engineering

The building sector is a substantial global industry that plays a significant role in the social and economic advancement of nations. The construction industry has been criticized for its unsustainable practices, including waste generation, pollution, and the consumption of non-renewable resources and energy. Due to the dynamic nature of the construction industry and the involvement of multiple parties with diverse goals, knowledge, and skills, the industry is susceptible to various risks that can undermine the sustainability of projects. This research aims to develop a Lean Management (LM) framework to deliver sustainable construction projects through reducing risks during the design process. …

A Framework For Enhancing Building Maintainability Through Facilitating Early Suppliers’ Involvement In The Design Process, Ayman Ahmed Ezzat Othman, Ahmed Ramadan Kamal

Architectural Engineering

Purpose – The aim of this paper is to develop a framework to enhance building maintainability through facilitating early suppliers’ involvement (ESI) in the design process. Design/methodology/approach – A research methodology consisting of literature review, case studies and survey questionnaire was designed to achieve the above-mentioned aim. Firstly, literature review was used to examine the concepts of building maintenance, maintainability, the design process and ESI. Secondly, three case studies were presented and analysed to investigate the role of ESI towards enhancing building maintainability during the design process. Thirdly, a survey questionnaire was carried out with a representative sample of architectural …

Innovation Management Framework For Achieving Sustainability Through Managing Risks Of Innovative Solutions During The Design Process, Ayman Ahmed Ezzat Othman, Rawan Medhat Hussein

Architectural Engineering

Purpose – Construction waste drivers, amplified by the linear economy model, contribute significantly to resource consumption and waste generation across various phases of the construction process. Recognizing the critical influence of the design process on these outcomes, this study aims to develop a framework integrating circular economy to reduce construction waste and promote sustainable practices during the design process within architectural design firms in Egypt.

Design/methodology/approach – A qualitative and quantitative research approach was used to accomplish four objectives. A comprehensive literature review explored the concepts of construction waste, the design process, the circular economy and Egypt’s Sustainable Development Strategy …

Ecu-Mss-2 Dataset, A New Multi-Species Seagrass, Md K. Noman, Syed M. S. Islam, Seyed M. Jalali, Jumana Abu-Khalaf, Paul Lavery

Research Datasets

The "ECU-MSS-2' dataset contains four different habitats, 'Amphibolis' spp (hereafter 'Amphibolis"), 'Halophila' spp (hereafter 'Halophila'), 'Posidonia' spp (hereafter 'Posidonia') and 'Background'. We compiled this image dataset from different sources. The 'Halophila' images were collected by the Centre for Marine Ecosystems Research, Edith Cowan University, Western Australia.

The 'Amphibolis' 'Background' and 'Posidonia' images were collected by the Department of Biodiversity, Conservation and Attractions (DBCA), Australia. The 'Amphibolis' class includes the seagrass species Amphibolis griffithii and Amphibolis Antarctica. The 'Halophila' class includes Halophila ovalis, while the 'Posidonia' class includes Posidonia sinuosa, Posidonia coriacea, and Posidonia Australis. The 'Background' class includes coral, sand, …

Alleviating Loneliness In Older Adults Using Polyvagal Theory Exercises, Helen Kornfeld

Antioch University Dissertations & Theses

Objectives: The 65 and older population is a growing population in the US. In this population there can be marked increases in isolation, loneliness, and depression. Polyvagal Theory holds that a greater sense of safety, security, and sense of engagement improves well-being. A key hypothesis stated that participation will lower self-report ratings of loneliness. Additional hypotheses included improving self-reported purpose in life and feelings of psychological safety.

Methods/Design: The present dissertation is a quasi-experimental design, utilizing pre- and post-test measures comparing degree of loneliness, depression, purpose in life (PIL), and Neuroception of Psychological Safety Scale (NPSS) in a 6-week novel …

Developing A Competency-Based Outcomes Framework For Doctor Of Physical Therapy Education, Catherine T. Schmidt, Sara Knox, Jane Baldwin, K. Douglas Gross, Jackie Tang, Diane U. Jette

Health Professions Education

Purpose. Physical therapist education programs rely on outcomes to evaluate a student’s competence in performing skills essential to the physical therapy profession. However, current outcomes, such as, graduation, employment, and licensure pass rates fail to assess comprehensive competence in the professional abilities of a physical therapist and offer variability in the expectations of competence in professional practice. Competency-based education (CBE) offers a learner-centered and evidence-based process to assess performance on consensus-driven outcomes over a period of time. While other medical professions have adopted this process it is new to physical therapist education programs. The purpose of this manuscript is …

Environmental Sustainability, Healthcare Workers And Healthcare Students: A Literature Review Of Attitudes And Learning Approaches, Pamela R. Mccauley, Kavita Mathur, Reza Kamali Miab, Nina Cohen, Kedena Henriques-Thompson, Jyo Gopinath

Health Professions Education

Purpose: Today, increased attention has been placed on the healthcare industry and its workers in the wake of the global COVID-19 pandemic. Increases in facemask production, personal protective equipment, and the number of patients admitted into hospitals have resulted in a sharp rise in medical waste and environmental concerns. This has led to a greater interest by the research community to study the type of training and education that healthcare workers and students receive which could facilitate the implementation of sustainability activities during their work.

Design/Methodology: We have conducted a literature review (2010 to 2024) on healthcare worker …

Improving Medical Education Of Risks Of Ai Use In Healthcare, Stephanie Quon, Catherine Ha

Health Professions Education

Artificial intelligence (AI) offers transformative potential in healthcare, enhancing drug discovery, data processing, early detection, and clinical decision-making. However, its adoption poses significant risks, including client harm, misuse, automation bias, perpetuation of inequities, and security issues. Effective integration requires ongoing collaboration among healthcare professionals, developers, policymakers, and ethicists to ensure accountability and transparency. As AI becomes more prevalent, medical education must evolve to equip students with a deep understanding of AI technology, risk assessment, and mitigation strategies. Currently, medical curricula fall short in this area, necessitating educational reforms. We propose diverse and comprehensive teaching methods, including case studies, interdisciplinary projects, …

A Secure And Robust Knowledge Transfer Framework Via Stratified-Causality Distribution Adjustment In Intelligent Collaborative Services, Ju Jia, Siqi Ma, Lina Wang, Yang Liu, Robert H. Deng

Research Collection School Of Computing and Information Systems

The rapid development of device-edge-cloud collaborative computing techniques has actively contributed to the popularization and application of intelligent service models. The intensity of knowledge transfer plays a vital role in enhancing the performance of intelligent services. However, the existing knowledge transfer methods are mainly implemented through data fine-tuning and model distillation, which may cause the leakage of data privacy or model copyright in intelligent collaborative systems. To address this issue, we propose a secure and robust knowledge transfer framework through stratified-causality distribution adjustment (SCDA) for device-edge-cloud collaborative services. Specifically, a simple yet effective density-based estimation is first employed to obtain …

Quantifying The Competitiveness Of A Dataset In Relation To General Preferences, Kyriakos Mouratidis, Keming Li, Bo Tang

Research Collection School Of Computing and Information Systems

Typically, a specific market (e.g., of hotels, restaurants, laptops, etc.) is represented as a multi-attribute dataset of the available products. The topic of identifying and shortlisting the products of most interest to a user has been well-explored. In contrast, in this work we focus on the dataset, and aim to assess its competitiveness with regard to different possible preferences. We define measures of competitiveness, and represent them in the form of a heat-map in the domain of preferences. Our work finds application in market analysis and in business development. These applications are further enhanced when the competitiveness heat-map is used …

Big Code Search: A Bibliography, Kisub Kim, Sankalp Ghatpande, Dongsun Kim, Xin Zhou, Kui Liu, Tegawende F. Bissyande, Jacques Klein, Traon Yves Le

Research Collection School Of Computing and Information Systems

Code search is an essential task in software development. Developers often search the internet and other code databases for necessary source code snippets to ease the development efforts. Code search techniques also help learn programming as novice programmers or students can quickly retrieve (hopefully good) examples already used in actual software projects. Given the recurrence of the code search activity in software development, there is an increasing interest in the research community. To improve the code search experience, the research community suggests many code search tools and techniques. These tools and techniques leverage several different ideas and claim a better …

Predicting Viral Rumors And Vulnerable Users With Graph-Based Neural Multi-Task Learning For Infodemic Surveillance, Xuan Zhang, Wei Gao

Research Collection School Of Computing and Information Systems

In the age of the infodemic, it is crucial to have tools for effectively monitoring the spread of rampant rumors that can quickly go viral, as well as identifying vulnerable users who may be more susceptible to spreading such misinformation. This proactive approach allows for timely preventive measures to be taken, mitigating the negative impact of false information on society. We propose a novel approach to predict viral rumors and vulnerable users using a unified graph neural network model. We pre-train network-based user embeddings and leverage a cross-attention mechanism between users and posts, together with a community-enhanced vulnerability propagation (CVP) …

Characteristics Of Active Deformation, Fault Interaction, And Earthquake Triggering In A Rapidly-Deforming Complex Normal Fault Network (South-West Türkiye), Manuel-Lukas Diercks

School of Geography, Earth and Environmental Sciences Theses

Despite often being overshadowed by disastrous earthquakes on subduction zones and continental transform faults, normal faulting earthquakes frequently cause severe destruction and casualties. Understanding earthquake occurrence and determining those faults most at risk of rupturing in destructive earthquakes is crucial to prevent disasters. A key approach to understanding earthquake occurrence is to understand how stress and strain develop through a fault system over the earthquake cycle. In this thesis, Coulomb stress modelling, SAR interferometry, and field work are combined with a comprehensive literature review to study active deformation, fault interactions, and earthquake triggering mechanisms in complex normal fault networks, with …