Digital Commons Network^™

Bilateral Privacy-Utility Tradeoff In Spectrum Sharing Systems: A Game-Theoretic Approach, Mengmeng Liu, Xiangwei Zhou, Mingxuan Sun

Faculty Publications

In spectrum sharing systems based on spectrum trading, user locations are vital for the efficiency of dynamic channel reuse. However, both primary users (PUs) and secondary users (SUs) undertake the risk of location information leakage: a malicious PU may illegally collect SUs' location information to manipulate market decisions; a malicious SU would threat a PU's operational privacy by inferring the PU's location through seemingly inoffensive queries. To protect both PUs' and SUs' location information in spectrum trading, a bilateral privacy preservation framework is introduced in this paper. A game-theoretic approach based on the Stackelberg model is proposed to achieve the …

Indigenous Women In Science: A Proposed Framework For Leadership, Knowledge, Innovation, And Complexity, Tracy Woodroffe, Ruth Wallace, Kathy Guthadjaka, Johanna Funk, Elaine L. Maypilama, Sarah Ireland, Renee Adair, Robyn Ober, Samantha Armstrong, Anne Lowell, Kellie Pollard

University of South Florida (USF) M3 Publishing

Indigenous engagement in tertiary education has been contentious in Australia for many years. This was brought sharply into focus with the 2012 review into higher education, which highlighted a lack of parity for Indigenous Australians. One of the solutions to a lack of parity in participation could be the concept of a dual academy. A dual academy approach to higher education would incorporate both Indigenous and Western knowledge systems equally. Conversations and thinking about Indigenous participation and engagement in higher education led to an opportunity to coordinate a series of workshops. These workshops, conducted in Darwin, Alice Springs, and Galiwin’ku …

Effect Of Social Media Marketing On Online Retail Performance Of Konga Nigeria Ltd, Abubakar A. Adamu, Muhammed Yazeed, Mohammed A. Dantsoho, Jamilu Abdulkadir, Aliyu A. Gemu

University of South Florida (USF) M3 Publishing

In Nigeria, e-commerce companies treat estimated delivery dates with a lack of confidence, as some industry insiders suggested. In an already small and addressable market, potential customers can shop on international e-commerce platform alternatives far more conveniently than on local, fragmented ones. With a market unsuitable for e-commerce, underdeveloped digital payment services and poor logistics and shipping infrastructure have resulted in high operating costs. With that in mind, this study examines the effect of social media marketing on the online retail performance of Konga Nigeria Ltd. In this study, data was collected using a questionnaire technique and a sample size …

Ai As A Boost For Startups Companies: Evidence From Italy, Irene Di Bernardo, Marco Tregua, Greco Fabio, Ruggiero Andrea

University of South Florida (USF) M3 Publishing

Innovative startups are growing everywhere; clearly, digital transformation is imperative for all businesses to compete, or better survive. Institutions prompt companies and businesses to adopt digital transformation tools, providing funds too, especially to startups (MISE, 2019).In particular, this study analyzes Artificial Intelligence, understanding its implications, ties and features in startups. No commonly agreed definitions are given about AI and startups, thus the tie between them should be deepened. One of the most cited definitions considers startup as a temporary organization looking for scalable business models (Blank, 2013). In literature little attention has been paid to the connection between startup and …

Modeling Capacity: Multiple Weaving Areas, Sheida Khademi

Civil Engineering Dissertations - Archive

Systematic, well-designed research provides the most effective approach to the solution of many problems facing highway administrators and engineers. Traffic congestion on freeway systems is one significant concern in urban areas throughout the U.S.A. In this era, building new freeways to reduce congestion is less feasible due to the high capital and social costs. Thus, the effective management and operation of existing freeway facilities has become a preferred approach to reduce traffic congestion. A weaving section is a common design on major highway facilities that always has been an interest to researchers. Weaving areas are characterized by frequent lane changes, …

Mechanical Response Of Chemically Treated Sulfate-Rich Clay Under Multiple Triaxial Stress Path, Azadeh Asghariastaneh

Civil Engineering Dissertations - Archive

Expansive clayey soils, which are abundant in arid and semi-arid areas, including the state of Texas, can lead to excessive distress in pavements, foundations, embankments, earth retaining systems and other civil infrastructure that is either made of or supported by this type of soils. Calcium-based stabilizers, such as lime, cement and fly ash, have become popular soil stabilizers due to their ready availability and relatively low cost; however, myriad cases of failures of pavements and foundation built over sulfate-rich treated clay have led researchers to search for more efficient substitutes for calcium-based stabilizers. A very limited number of studies, however, …

Transmission Telescope Optical Dynamic Alignment, Viviana Vladutescu, Aaron J. Swank, Dzu K. Le, Calvin R. Robinson, O. Scott Sands

Publications and Research

The Integrated Radio Optical Communication System (iROC) is designed to transmit data between Mars and Earth by means of radio waves at 32.67 GHz (Ka band) and laser beam (LB) at 1550 nm, both transmitted via a combined telescope/antenna called a teletenna. The iROC terminal will provide “beaconless” operations to allow full function from the outer planets. In order to point without the aid of an uplink beacon, the proof of concept presented here is addressing the need for an accurate determination and control of the relative position of the LB with respect to a reference star.

The experiment presented …

Development Of A Hybrid Hydrogel Drug Delivery System For Treatment Of Ischemic Injury, Andrew Demaria

All Dissertations

In the United States, ischemia resulting from cardiovascular disease and acute trauma affects nearly 50% of all adults. Therapeutic angiogenesis aims to stimulate the formation of new microvasculature that alleviates hypoxia, reduces tissue morbidity, and improves wound healing. The current primary therapeutic approach is vascular endothelial growth factor (VEGF) injection therapy but is hindered by several challenges. Consequently, bioactive small molecules are being used to target hypoxia-inducible factor-1α (HIF-1α), the master regulator of oxygen-sensing pathways that is responsible for activating angiogenesis in response to tissue hypoxia. However, successful clinical translation of small molecules for therapeutic angiogenesis still faces several challenges …

Investigating The Detoxification Of Cadmium By The Tardigrade Hypsibus Exemplaris., Adedamola Olatoregun

Dissertations (2016-Present)

Heavy metals such as Cadmium are known stressors in aquatic environments due to being persistent in nature and the ability to bioaccumulate in organisms. Cadmium ranks 7th on the Agency for Toxic Substance and Disease Registry’s 2019 Substance Priority List. It is also listed as a substance of very high concern by the European Chemicals Agency. Thus, it is considered one of the most important environmental and occupational pollutants existing. This study aimed at investigating the cellular responses to the heavy metal Cadmium (Cd) and observe the processes that are involved in its detoxification. Tardigrade specimens (Hypsibius exemplaris) were exposed …

Mitigating Roadway Disasters In Extreme Flooding Events: A Critical Case Study Of Flood Fatalities In Harris County, Texas, Liza T. Powers

Dissertations (2016-Present)

From 1959 – 2009, Texas has annually led the nation in the number of flood fatalities. On average the number of deaths in Texas was three times the amount of the second leading state (Sharif, Hossain, Jackson & Bin-Shafique, 2012). Quantitative studies have attempted to construct the definition of when, how and the likelihood that a person dies in a flood event, why they made the fatal decision to drive, and who is particularly vulnerable to making this decision. This dissertation used a qualitative approach to explore this occurrence in a deeper and more meaningful context. This dissertation includes four …

The Constitution Of Mathematical Knowledge With Augmented Reality, Rosa Monteiro Paulo, Anderson Luís Pereira, Elisangela Pavanelo

The Mathematics Enthusiast

Digital Technologies are increasingly present in our activities. Many things we do we are not even able to imagine how they would be done, if we did not have the technological resources at hand. However, perhaps in the opposite direction of this, in the school context, or in teaching and learning, the discussion about the potential and the viability of these resources is still subject of a non-consensual discussion. When this context is Higher Education, specifically in undergraduate courses, the situation is even worse, as stated by research that we bring in this text. In disciplines such as Differential and …

An Analysis Of The Influences Of A Hybrid Learning Environment In The Solution Of Vector Tasks According To The Anthropological Theory Of The Didactic (Atd), Jany Santos Souza Goulart, Luiz Márcio Santos Farias, Hamid Chaachoua

The Mathematics Enthusiast

This paper discusses a part of a doctoral study based on the theoretical pillars of the Anthropological Theory of the Didactic (ATD). Supported by this theory, our research interest followed a path that led us to the teaching of the mathematical object vector and its institutional configuration in a Mathematics Teaching course at Universidade Estadual de Feira de Santana (UEFS), in the state of Bahia, Brazil, centered on two dichotomous aspects. The first one refers to the possibility of application and institutional relevance of this mathematical object. The second aspect is related to the obstacles encountered in the didactical scope, …

Characterizing Bacterial Communities Across A Nutrient Gradient Over Winter Months, Emily Jin Searles Stone

Theses, Dissertations and Culminating Projects

When trying to understand how anthropogenic activities affect patterns in community ecology, bacterial communities are frequently neglected. These bacterial communities are essential to the overall health and stability of several different ecosystems. As nutrient pollution increases, some bacterial taxa may increase, causing an imbalance in food web dynamics and disrupting biogeochemical cycles. Next-generation sequencing coupled with water chemistry measurements has allowed for association testing between site water characteristics and bacterial taxa. By examining bacteria along a natural nutrient gradient over winter months in Overpeck Creek in northern New Jersey, this research shows that anthropogenic activities, specifically nutrient pollution, can alter …

Severity Analysis Of Large Truck Crashes- Comparision Between The Regression Modeling Methods With Machine Learning Methods., Jinli Liu

Theses (2016-Present)

According to the Texas Department of Transportation’s Texas Motor Vehicle Crash Statistics, Texas has had the highest number of severe crashes involving large trucks in the US. As defined by the US Department of Transportation, a large truck is any vehicle with a gross vehicle weight rating greater than 10,000 pounds. Generally, it requires more time and much more space for large trucks to accelerating, slowing down, and stopping. Also, there will be large blind spots when large trucks make wide turns. Therefore, if an unexpected traffic situation comes upon, It would be more difficult for large trucks to take …

The Art Of The Climbing Wall, Gavin P. Day

Undergraduate Honors Theses

The aim of my thesis is to share the intricacies of climbing wall design, and the building blocks of art, science, and philosophy that go into the work. I will also be detailing my journey of learning through mentorship, trial and error, and my own experience with climbing. All of this culminates in a redesign of the current climbing wall at ETSU’s Basler Center for Physical Activity. While there is limited information on climbing wall design theory, insight is given through industry standards, competition regulations, and interdisciplinary design philosophies

Indigenous Science Network Bulletin - August 2021

Indigenous Science Network

In this edition of the bulletin, we present another collection of items related to First Nations peoples and their science for an audience of teachers, scientists and interested community members from across the globe.

Local Style Preservation In Improved Gan-Driven Synthetic Image Generation For Endoscopic Tool Segmentation, Yun Hsuan Su, Wenfan Jiang, Digesh Chitrakar, Kevin Huang, Haonan Peng, Blake Hannaford

Engineering: Faculty Publications

Accurate semantic image segmentation from medical imaging can enable intelligent vision-based assistance in robot-assisted minimally invasive surgery. The human body and surgical procedures are highly dynamic. While machine-vision presents a promising approach, sufficiently large training image sets for robust performance are either costly or unavailable. This work examines three novel generative adversarial network (GAN) methods of providing usable synthetic tool images using only surgical background images and a few real tool images. The best of these three novel approaches generates realistic tool textures while preserving local background content by incorporating both a style preservation and a content loss component into …

Long Term Recovery From Cattle Grazing Disturbance And Climate Impacts At Capitol Reef National Park, Utah, Erin Tessens

Master's Theses

Cattle grazing has influenced the environment in the western United States since European settlement in the 1800’s. Continuous and heavy grazing on arid and semi-arid rangelands has resulted in decreased biodiversity, changes in vegetation structure, and vulnerability to exotic plant invasion. Heavy grazing has also been linked to decreased cryptobiotic soil due to trampling and susceptibility to erosion. With a lack of effective means of successful habitat restoration, there is a rising concern among land managers to maintain these intricate systems, notably under the threat of climate change. Consequently, there is a critical need to understand these system’s response to …

Towards Real-Time Energy Efficiency Analysis Of A Hydraulic System, Montasir Mamun Mithu

Masters Theses

The study aims at developing a real-time data analysis system for the energy efficiency study of hydraulic systems. It also aims at implementing automation for hydraulic systems so that energy efficiency can be improved using the real-time approach. This research uses a system-level experimental methodology. A linear push system hydraulic prototype is developed for the study. The prototype contains hydraulic actuator, shock absorber, electronic flow control valve, and electronic sensor. This prototype is used to experiment with different operating conditions to characterize hydraulic system behavior. A real-time data analysis system is developed using LabVIEW and an Open Platform Communication (OPC) …

Application Of Artificial Intelligence And Machine Learning In Libraries: A Systematic Review, Rajesh Kumar Das, Mohammad Sharif Ul Islam

Library Philosophy and Practice (e-journal)

As the concept and implementation of cutting-edge technologies like artificial intelligence and machine learning has become relevant, academics, researchers and information professionals involve research in this area. The objective of this systematic literature review is to provide a synthesis of empirical studies exploring application of artificial intelligence and machine learning in libraries. To achieve the objectives of the study, a systematic literature review was conducted based on the original guidelines proposed by Kitchenham et al. (2009). Data was collected from Web of Science, Scopus, LISA and LISTA databases. Following the rigorous/ established selection process, a total of thirty-two articles were …

Haunted And Hunted: The Gothic And The Ghostly In The Light And Asylum, Adam Dunnells

Master's Theses

Young adult Gothic horror fiction acts as a coming-of-age story wherein the protagonists must confront the metaphorical and literal ghosts while simultaneously attempting to establish a sense of identity. Applying Gothic theory and ghost theory to the ghostly stories in young adult Gothic horror demonstrates how certain young adult Gothic stories represent the struggle of adolescents as they mature into adulthood and search for their identities. I use Madeline Roux’s Asylum (2013) and D.J. MacHale’s The Light (2010) as case studies to analyze how ghostly antagonists directly oppose adolescent protagonists on their coming-of-age journeys. Analyzing these young adult Gothic horror …

Sedimentology And Shallow Groundwater Responses Of A Coastal Marsh Along A Salinity Gradient: A Case Study In Grand Bay National Estuarine Research Reserve, Mississippi, James Thompson

Master's Theses

Climate change and relative sea level rise is resulting in saltwater intrusion and inundation of coastal marshes. This study investigates factors affecting marsh hydrology, including sediment composition, seasonal variability, and coastal storms in Grand Bay National Estuarine Research Reserve (NERR) near Pascagoula, Mississippi. Analysis of sediment includes color, organic matter, carbonate, magnetic susceptibility, and particle size. Shallow groundwater hydrologic trends between Summer 2015 and Fall 2016 are established along a salinity gradient at four sites using water levels, temperature, and conductivity monitored at the surface and in piezometers at depths of 0.75m, 1.5m, and 2.25m.

Sediment analysis indicates reducing conditions …

A Modified Preconditioned Conjugate Gradient Method For Approximating The Scattering Amplitude, Samson Ayo

Master's Theses

In this thesis, we look at an iterative method for approximating the scattering amplitude that involves solving two linear systems: a forward system Ax=b and an adjoint system A^Ty=g. Once these two systems are solved, the scattering amplitude, defined by g^Tx=y^Tb is easily obtained.

We derive a conjugate gradient-like iteration for a nonsymmetric saddle point matrix that is constructed to have a real positive spectrum. We investigate the use of Schur Complement preconditioners with block-diagonal factorization to speed up the convergence of our method and compare …

Recommendations For The Use Of The Veggie Meter® For Spectroscopy-Based Skin Carotenoid Measurements In The Research Setting, Marcela D Radtke, Mykaela Poe, Jodi Stookey, Stephanie Jilcott Pitts, Nancy E Moran, Matthew J Landry, Lewis P Rubin, Virginia C Stage, Rachel E Scherr

Children’s Nutrition Research Center Staff Publications

Carotenoids are a class of phytochemical compounds found in a variety of fruits and vegetables (F/V) and, therefore, are commonly used as a biomarker for F/V intake. The Veggie Meter® is a noninvasive research-grade instrument that detects and quantifies carotenoids in the skin. To determine current practices and examine variability among users, a survey was administered to researchers using the device (n = 19, response rate = 35.8%) and variation in anatomical site preparation, calibration, number of measurements, measurement site, and documentation was observed. A protocol was developed in partnership with Veggie Meter® users to outline the preparation, calibration, …

In Vitro Osteogenic Performance Of Two Novel Strontium And Zinc-Containing Glass Polyalkenoate Cements, Daniella Marx, Alireza Rahimnejad Yazdi, Marcello Papini, Mark R. Towler

Chemical and Biochemical Engineering Faculty Research & Creative Works

Glass polyalkenoate cements (GPCs) are under investigation as potential bone adhesives, as they may provide an alternative to polymethylmethacrylate-based cements. GPCs containing strontium (Sr) and zinc (Zn) in place of aluminum (Al) are of particular interest because these ions are known stimulators of osteoprogenitor differentiation. GPCs have been manufactured from a novel bioactive glass (SiO2:0.48, ZnO:0.36, CaO:0.12, SrO:0.04) in the past, but, while such materials have been assessed for their influence on viability, their influence on osteogenic function has not been investigated until now. For this study, two GPCs were formulated from the same glass precursor evaluated in previous studies. …

Telehealth Assessment In The Elderly Using The 4m'S, Witeh Esoe

Nursing Capstones

COVID-19 brought unprecedented challenges in accessing healthcare services. The lack of accessibility to healthcare drastically impacted older adults, especially those in rural America, who experienced multiple issues accessing quality care with an increase in healthcare cost leading to a significant increase in morbidity and mortality rate from COVID-19. Consequently, the usage of telehealth services skyrocketed during the pandemic. As a result, the Geriatric Workforce Enhancement Program (GWEP) emerged with the aim to promote the use of telehealth services to reduce COVID-19 exposure to older adults in rural North Dakota (ND). Thereby keeping older adults safe at home and still having …

Learning And Exploiting Shaped Reward Models For Large Scale Multiagent Rl, Arambam James Singh, Akshat Kumar, Hoong Chuin Lau

Research Collection School Of Computing and Information Systems

Many real world systems involve interaction among large number of agents to achieve a common goal, for example, air traffic control. Several model-free RL algorithms have been proposed for such settings. A key limitation is that the empirical reward signal in model-free case is not very effective in addressing the multiagent credit assignment problem, which determines an agent's contribution to the team's success. This results in lower solution quality and high sample complexity. To address this, we contribute (a) an approach to learn a differentiable reward model for both continuous and discrete action setting by exploiting the collective nature of …

Context-Aware Outstanding Fact Mining From Knowledge Graphs, Yueji Yang, Yuchen Li, Panagiotis Karras, Anthony Tung

Research Collection School Of Computing and Information Systems

An Outstanding Fact (OF) is an attribute that makes a target entity stand out from its peers. The mining of OFs has important applications, especially in Computational Journalism, such as news promotion, fact-checking, and news story finding. However, existing approaches to OF mining: (i) disregard the context in which the target entity appears, hence may report facts irrelevant to that context; and (ii) require relational data, which are often unavailable or incomplete in many application domains. In this paper, we introduce the novel problem of mining Contextaware Outstanding Facts (COFs) for a target entity under a given context specified by …

Estimating Homophily In Social Networks Using Dyadic Predictions, George Berry, Antonio Sirianni, Ingmar Weber, Jisun An, Michael Macy

Research Collection School Of Computing and Information Systems

Predictions of node categories are commonly used to estimate homophily and other relational properties in networks. However, little is known about the validity of using predictions for this task. We show that estimating homophily in a network is a problem of predicting categories of dyads (edges) in the graph. Homophily estimates are unbiased when predictions of dyad categories are unbiased. Node-level prediction models, such as the use of names to classify ethnicity or gender, do not generally produce unbiased predictions of dyad categories and therefore produce biased homophily estimates. Bias comes from three sources: sampling bias, correlation between model errors …

Mentally Restorative Areas For Students: Impacts Of Nature On Psychophysiological State, Jesse Moore

Honors Theses

Situated in the top outdoor ranking city of Chattanooga, the campus of the University of Tennessee at Chattanooga (UTC) includes diverse areas available for student rest and recreation. This study aims to introduce UTC students into the collection of studies on the effects of natural environments on Attention Restoration Theory (ART) by using the Stroop cognitive test and portable electroencephalograph (EEG) headsets. Participants completed the Stroop test after ten-minute mental restoration sessions in environments of varying natural exposure included on campus. Through analysis of variance, location was found to significantly influence performance on Stroop testing and measures of relaxation (p=0.030). …