Digital Commons Network^™

Radiological Decontamination Methodologies On Litter-Bound Patients In Arctic Environments, And The Associated Airborne Risks Posed To First Responders, Juan S. Alb

Theses and Dissertations

This study was conducted to determine if air-based decontamination (decon) methods would be effective at both treating patients exposed to dry, radiological contamination as well as reducing its re-aerosolization during the disrobing process, such that these methods could be applied on litter-bound patients in extreme cold environments. A litter-bound, full-size mannequin dressed in a set of standard military issue extreme cold weather jacket and pants coated in 27 g (1 Tbs) of Copper Oxide (density 6.315 g/cm³ ) was given one of three treatments for dry aerosol decon. The three cleaning treatments included high-efficiency particulate air (HEPA) vacuum, a …

Standardization Of Risk Classifications For Unmanned Space Vehicle Missions, Collin A. Gwaltney

Theses and Dissertations

This paper seeks to model risk classification levels (A-D) for 122 Space Vehicle programs. Models include multinomial logistic regression as well as random forest, a machine learning technique based on decision trees. We use independent variables (IVs) which are theoretically correlated to risk class for the regression and one random forest model. We then include all IVs and allow the random forest technique to use those which provide the most information on risk class before paring down the number of IVs to only 7. We show that the accuracy of predictions increases from 62% to 87% by using random forest …

An Investigation Of Torso Muscle Fatigue And Its Relation To Discomfort During Vertical Vibration Exposure, Nathan H. Hodges

Theses and Dissertations

Military and civilian helicopter pilots often experience back pain attributed to vibration exposure during flight and sustained poor posture, known as the "helicopter hunch." This study investigated torso muscle activation using surface electromyography (EMG) to assess the relationship between discomfort and muscle fatigue. Eight subjects were exposed to different vibration frequencies over two-hour periods, with EMG data collected every five minutes. Significant differences in muscle activation were observed before and after vibration exposure, suggesting increased muscle activation during vibration compared to prolonged seating alone. Discomfort surveys indicated higher discomfort during vibration.

Advanced Oxidation Of Methyl Tert Butyl Ether With Ultraviolet Light Emitting Diodes, Aaron R. Neal

Theses and Dissertations

Methyl Tert-Butyl Ether (MTBE) is a volatile, soluble, organic compound introduced to gasoline within the United States as a fuel oxygenator in 1979. MTBE is a common groundwater pollutant due to its high water solubility and resistance to bio-degradation; it commonly infiltrates groundwater sources via leaking underground storage tanks or fuel spills. This research employed ultraviolet light emitting diodes (UV-LEDs) and hydrogen peroxide (H₂O₂) induced advanced oxidation process (AOP) to treat MTBE contaminated water at the bench scale. Using four H₂O₂:MTBE molar peroxide ratios (100:1, 200:1, 400:1, 500:1), MTBE degradation was induced …

Signal-To-Image Method For Counterfeit Detection In Layered Security Paradigm, Jordan Williamson

Theses and Dissertations

National level attention, resources, and priority regarding critical infrastructure have increased in recent years. This has led to adversaries and defenders exchanging positions between fortification and exploitation. One area that continues to be vulnerable is supply chain attacks like counterfeit insertion. This work investigates the application of converting collected signals into images from devices that may be considered for these critical networks. There are several aspects regarding the conversion of signals into images - specifically Red, Green, Blue (RGB) images. The methodology proposed here is potentially ideal fit for an initial security layer by achieving comparable classification results as more …

End-User Device Management In The Air And Space Forces, Joshua Bonvissuto

Theses and Dissertations

When achieving technical superiority is a matter a national security, it is critical that the Department of the Air Force (DAF) employs a robust Information Technology Asset Management (ITAM) strategy that maximizes mission effectiveness. Since 2022, the Office of the Chief Information Officer (SAF/CN) has been developing a plan to transform the Air Force’s ITAM strategy, primarily intending to centralize End User Device (EUD) procurement to the DAF level. For this study, a Delphi study was conducted to gather expert opinions on key aspects of SAF/CN’s new ITAM strategy to identify strengths, weaknesses, and implementation challenges. This research provides valuable …

A Comparative Study Of The Business Models Used In The U.S. And Saudi Arabia Firms In Relation To Venture Capital, Abdulmajeed Ali Alkthiri

Theses and Dissertations

While venture capital (VC) has expanded globally, challenges in comparing international VC strategies remain due to data limitations and theoretical variability. This study contrasts VC investment philosophies, support mechanisms, and exit strategies in mature US firms with those in developing Saudi Arabia from 2016-2021. Analyzing fundraising, sector focus, deal volume, and exit outcomes, it finds significant differences attributed to ecosystem maturity, with some convergence in contracting and mentoring. The findings highlight the need for US VC models to adapt strategically in Islamic markets, suggesting regulatory reforms for market development. This research provides guidelines for effective cross-border VC strategy adaptation.

Using An Anti-Deficit Framework To Explain The Academic Achievement Of Black Men In Higher Education: A Narrative Inquiry, Donald E. Reed

Theses and Dissertations

This dissertation explores the academic experiences of Black men who have completed their bachelor's degrees at predominantly white institutions (PWIs), utilizing an anti-deficit perspective. Despite the reality that only 36% of Black men achieve their undergraduate degrees within six years, this study shifts the narrative from focusing on obstacles to emphasizing success strategies, aiming to narrow the opportunity gap between Black men and their White peers. Through narrative inquiry and the Anti-Deficit Achievement Framework, this research not only showcases the resilience and determination of these individuals but also illuminates the varied strategies they employ to navigate their higher education journey …

The Clash Of Sustainable Development Goals With The Reality In Egypt: The Role Of The Media On The Perception Of Clean Energy Implementation., Nourhan Salah Hamed Ebrahim

Theses and Dissertations

Media has promoted sustainable development goals as essential for a country's social, economic, environmental, and political development. However, the SDGs may collide with the reality and impede development due to certain circumstances and challenges that might hinder the country’s ability to achieve these goals the same way they planned for. Besides, such challenges are not being covered in the media agenda, addressed by the government, or even been tackled in previous research. Thus, this study aims to examine whether there is a conflict between the SDGs and the reality in Egypt, focusing on SDG 7 (Clean Energy) by analyzing the …

Valuing Circularity: Sustainable Finance With Real Options Methodology, Mostafa Alloub

Theses and Dissertations

This thesis presents an enhanced framework for valuing circular investments based on the Value Hill model using real options analysis. We propose a new flexible numerical methodology for valuing circularity using the Least Squares Monte Carlo simulation (LSMC) method of Longstaff and Schwartz (2001). The Value Hill model of circularity represents the course followed by the value of an asset, specifically after primary use. To validate the efficiency of our model, we conduct an empirical study on the smartphone business using the case of Apple. Results of our empirical analysis show that investing in circularity enhances financial value. Our model …

Postal Delivery Systems And Cryptomarkets, Trevor Lewandowski

Theses and Dissertations

This thesis utilizes quantitative methods to evaluate the relationship between the level of development of state postal delivery systems and the number of drug sales originating on dark web cryptomarkets. I use data from the United Nations Universal Postal Union on state postal system operating expenditures to convey postal system development and compare it to the country-of-origin and acceptable countries-of-destination listed on cryptomarket drug postings. The cryptomarket drug postings being used were collected by previous scholars from a leak on Agora from 2014-2015. This dataset contains 96,286 observations of cryptomarket-based drug transactions. This paper expected to find that moderately developed …

Consumers' Acceptance To Buy And Dispose Of Recycling Textile Products, Roa Alsayed

Theses and Dissertations

The textile industry is the second most polluting worldwide, following food manufacturing. It is one of the industries that is rarely scrutinized in the Middle East and North Africa (MENA) region. This work analyzes the fashion industry from the perspective of consumer attitudes towards the purchase and disposal of clothing, and their behavior with regards to old garments. The study was conducted in Saudi Arabia and Egypt, two countries that achieved similar results in the fashion industry. The methodology is divided into three phases. First, the manuscript begins with a review of topics such as sustainability, consumer behavior in the …

Uprooted But Unbroken: Exploring The Experiences Of Yemeni Students At Yemeni Schools In Cairo, Sumood Abdulhadi

Theses and Dissertations

To contribute towards filling the research gap on the experiences of uprooted Yemeni children in Egypt, this phenomenological research was designed to explore the experiences of uprooted Yemeni students in Egypt. Twenty male and female Yemeni students from four Yemeni schools in Cairo participated in semi-structured interviews. The findings revealed that these uprooted children face various economic, social, and academic challenges within the Yemeni schools in Cairo, which seem to hinder their educational progress. Moreover, Yemeni children face difficulties not only within the Yemeni schools in Cairo but also in the streets and Egyptian schools of Cairo. Nevertheless, they appeared …

Teachers’ Perceptions Of The Factors That Challenge And Advance Music Education In K-12 Schools: A Qualitative Study In Lebanon, Khaldoun Abou Dargham

Theses and Dissertations

Music education plays a crucial role in developing students on the individual level and societies on the communal level. Despite its benefits on the human brain, student learning, physical and mental health, and its contribution to culture and the creative economy, music education still faces challenges that prevent it from fulfilling its potential. Due to scant research on the factors that impact music education in Lebanon, this phenomenological study explored the perceptions of six K-12 music teachers in Mount Lebanon through in-depth interviews regarding the issue. Drawing upon the constructivist and humanistic learning theories, the research investigated how the Lebanese …

Properties Of Portland Cement Concrete Incorporating Basalt-Based Pozzolanic Cement, Rana Khalil

Theses and Dissertations

Over the last decade, the world's population has increased dramatically. Due to this growth, the demand for concrete and Portland cement, in return, have increased. Manufacturing of Portland cement is an energy-intensive process that, alone, contributes to about 8% of global CO2. For decades, efforts have been exerted to reduce the harmful environmental impacts of Portland cement by reducing its use in concrete as well as considering alternate binders that may fully or partially replace it. This study aims to assess the properties of concrete incorporating a novel basalt-based pozzolanic cement. To meet this objective, four sets of concrete mixtures …

Exploring Purpose, Practices, And Impacts Of Non-Formal Education In Egypt, Mariam Hussien Sayed Abdelhamid

Theses and Dissertations

This research explores non-formal education in Egypt, analyzing its alignment or divergence with prevalent human capital and modernization discourses. Using a narrative approach, the study explores the practices of four organizations that offer non-formal education opportunities in greater Cairo: San3a Tech, Wataneya Society, Alwan wa Awtar, and AlAthar Lina. The study explores the narration of 9 educators and 10 learners from these organizations to understand from educators’ perspectives how they design their experiences and its relation to the culture and needs of the targeted audience. It also looks at what kind of impact do these experiences have on the learners. …

Integrative Genomic Insights Into Coral Resilience: Adaptive And Acclimatory Responses To Seasonal Environmental Shifts, Tasnim Ghanim

Theses and Dissertations

Coral reefs, critical to marine biodiversity and coastal protection, face escalating threats from climate change-related phenomena such as ocean warming. This warming is leading to widespread thermal stress that contributes to coral bleaching and infectious disease in corals, leading to the disruption of marine ecosystems and the economies that depend on them. Focusing on the brain coral Platygyra daedalea, known for its thermal resilience in the Persian Arabian Gulf—a region that exemplifies the extreme stressors of climate change—our study aims to dissect the genetic, transcriptomic, and microbiological underpinnings of coral survival in high-temperature environments predicted for the end of …

University Students' Wellbeing: A Case Study Of An International Private University In Egypt, Alia Attia

Theses and Dissertations

Wellbeing is a crucial topic that is gaining increasing attention in higher education and should be taken into careful consideration. This is a qualitative case study, using a phenomenological approach, which explores the phenomenon of student wellbeing in an international private university in Egypt. Data was collected through semi-structured individual interviews with a total of fourteen participants: eight purposefully selected students who have taken part in wellbeing programs, initiatives, or events at the American University in Cairo (AUC), as well as six faculty/staff members, leaders, mentors, or coaches in the field were interviewed. In addition to the interviews, conversations were …

Syrian Investments And The Insertion Of Displaced Syrians In The Egyptian Labor Market, Sajeda Khattab

Theses and Dissertations

This study explores Syrian investments and the economic insertion of displaced Syrians in the Egyptian labor market, specifically focusing on middle/large scale investments in the hospitality and textile sectors. It addresses a gap in the theoretical literature concerning Syrian investments during displacement and their economic insertion in Egypt, examining the legal framework and provisions related to employment. The conceptual framework investigates how Syrian business owners' investments contribute to the insertion of displaced Syrians, emphasizing business size, legal status, and economic resources. The findings reveal a positive impact on economic integration, highlighting entrepreneurial strategies, local growth, difficulties, and their transformative role …

Green Fame On Tiktok Analyzing Digital Persuasion Appeals On Climate Change Discourse Among The Public And Youth., Sherry Ayad

Theses and Dissertations

In a constantly changing media ecosystem, TikTok is gaining prominence and attention, particularly among youth and Gen Z. The platform’s unique affordances are recently being utilized by young voices to promote self-expression and social activism. Consequently, TikTok’s changing nature is giving space for serious social and political issues impacting the future of young generations on topics such as climate change. By analyzing the top N=400 TikTok videos from the 27th Conference of the Parties (COP27) to the 28th Conference of the Parties (COP28), this study contributes to rare knowledge of utilizing TikTok’s affordances in scientific and political topics such as …

Prediction Of Distresses In Pavement Networks: A Machine Learning Approach, Mahmoud Kotb

Theses and Dissertations

The quality of pavement networks is greatly affected by different distresses. These distresses appear in many forms, such as cracking, potholes, rutting and different types of deformation. As a result, to ensure effective pavement management, accurate modeling of these different distresses has become essential. Moreover, machine learning models have shown great potential in modeling pavement performance in recent years. The objective of this research is to develop machine learning models for modeling key parameters of pavement distress, specifically the International Roughness Index (IRI), fatigue and longitudinal cracking. Data for this investigation were extracted from the Long-Term Pavement Performance (LTPP) database, …

Exploration Of Sustainable Attitudes And Behaviors And The Role Of Planned Behavior Amongst The Auc Community, Natalie Tamer Khairy

Theses and Dissertations

This thesis explores the use of a new Framework that was developed by combining both the Theory of Planned Behavior (TPB) and Knowledge, Attitudes, and Practices (KAP) theory to study the sustainability behaviors of students, faculty, and staff at the American University in Cairo (AUC). The research aims to provide insights into the factors influencing sustainable behaviors and how these factors differ across the three groups. The study used a combination of questions from the sustainability awareness questionnaire (SAQ) and Sulitest that was customized to the cultural context of the target group. The survey was administered to a sample of …

Moving Through The Violence: Yemeni Migrants And The Reconstruction Of Lifeworlds In Cairo, Jonathan Hearn

Theses and Dissertations

This Master’s thesis is based on an ethnographic study, following the lives of a small number of Yemeni people rebuilding their lives in Cairo. Their displacement is the consequence of many factors not least the outbreak of war in 2014. In response to this, I ask: In the midst of ongoing conflict, how do Yemeni migrants go about reconstructing their lifeworlds in Cairo? That is, to ask how are Yemeni migrants in Cairo responding to the violent disruption of their social realities and what sense are they making of the consequences. The reorganisation of social realities disrupted by conflict means …

Swipe For More: Digital Sex Education, The Emergence Of Femtech And The Neoliberal Subject In Cairo, Egypt, Marisa Breathwaite

Theses and Dissertations

In this thesis, I approach digital sex education in Cairo, Egypt and how it is navigated by Cairo’s urban elite. The way digital sex education in Cairo is consumed via social media and online courses is touted as “new” by popular media coverage. The content, products and services boast the first of their kind by the creators of the platforms themselves. That middle and upper class Cairene women are talking about sex online and consuming digital sex education content, in visible public forums, is portrayed as a completely novel phenomenon—in other words, platforms like Cairo’s first femtech company, Motherbeing, are …

Vulnerability Assessment Of Mangroves In Western Shore Of Red Sea, Nada Negm

Theses and Dissertations

Mangroves are vital to environmental sustainability and acts as a global warming control, although they endure severe vulnerability due to some human activities. Climate change and other extrinsic stresses are factors that play a vital role when assessing the vulnerability of mangroves in the Red Sea. The aim of this study is to assess the vulnerability of mangroves using field and RS data to apply a vulnerability index of mangroves at Hamatta and Safaga in Egypt. Mangrove Vulnerability Index covers includes hazard mangrove index, biological mangrove index and physical mangrove index.

Mangrove height has been measured using meter tape and …

Experiences Of Female Academic Leaders In Higher Education: A Case Study In Cairo, Amina Sabour

Theses and Dissertations

Such as in many contexts, the gender gap in higher education leadership persists universally. Women are still underrepresented despite the contributions they demonstrate in leading higher education institutions. This study aims to contribute to the area of research in this regard by exploring the experiences of female academic leaders in Cairo, Egypt. It specifically highlights the challenges these women face, and how they manage to overcome it. Using a qualitative approach to deeply explore the phenomenon, ten interviews were conducted with female leaders at the American University in Cairo. Looking through the lens of intersectional feminism, under the umbrella of …

Assessing Adoption Barriers Of Sustainable Packaging In Egypt, Carol Ramses Morgan

Theses and Dissertations

Sustainable packaging has become an essential part of business decisions and corporate directions. With the rise of environmental damages due to improper waste management and unsustainable practices, businesses have a major responsibility to analyze their products’ life cycles and redesign them with sustainability in mind. Applying sustainable packaging could save companies large amounts of resources, therefore cutting costs, while also achieving the legal and social duty as a corporation towards society and the environment. Many developing countries, with specific focus on Egypt, have recently focused on legislative and corporate decisions in order to encourage more sustainable practices. Egypt’s new Waste …

Covid-19 And Labor Shortage In France: Exploring The Contribution Of Tunisian Migrant Workers In Bridging The Labor Shortage, Sana Gasmi

Theses and Dissertations

This thesis employed a qualitative approach, combining both desk research and in-depth interviews with 11 participants: nine Tunisian migrant workers and two Tunisian migrant experts. The thesis examined labor shortage in France during the pandemic and the extent to which Tunisian migrant workers managed to bridge the labor shortage relying on the Segmented Labor market theory which was originally developed by Piore (1979), and the two concepts: System Effects and Systemic Resilience. Findings indicate that the COVID-19 pandemic unveiled several weaknesses in the French labor market system including the acute labor shortage. Faced by labor shortage, France turned to migrant …

Applicability Of Using Bio-Receptive Concrete For Building Facades In Egypt, Gina Roupheil

Theses and Dissertations

The significant increase in carbon dioxide emissions caused by the construction industry is detrimental to our planet. This is rapidly increasing with the urbanization of cities that is gradually taking its toll on the available green spaces, which help in balancing such emissions. Recently, researchers have been trying to make use of bio-receptivity to create biomaterial systems that could be spread on building envelopes and support the growth of small plant species and microorganisms to establish on. Out of those materials, comes the concrete as a promising material for bio-colonization.

Within this context, this study aims at investigating the applicability …

Abundant Bodies In Times Of Excess: A Critical Exploration Of Fatness From Cairo To Tokyo, Sarah Aly

Theses and Dissertations

This work is an autoethnographic exploration of the social construction of fatness in contexts of existing and emerging neoliberal state control through the embodied experiences of fat people, following the tradition of ‘fat epistemology’ promoted by the emerging 'critical fat studies' field. It is a comparative study of the experiences of fatness as an unstable embodied category of being, rather than a liminal undesirable state or medical condition, in Cairo, Alexandria, and Tokyo, paying particular attention to the gender, racial, and class dynamics surrounding the construction (and marginalization) of fatness across various spatial and temporal contexts. These experiences are considered …