Digital Commons Network^™

Tuning Ion Mobility And Molecular Confinement In High-Performance Polymer Electrolytes For Energy Storage, Ezzeldien Yousef Muhammed Yousef

Theses and Dissertations

This research addresses the critical energy density limitations of aqueous supercapacitors, which are traditionally constrained by the narrow electrochemical stability window (ESW) of water 1.23 V. By employing two distinct molecular engineering strategies, this study developed high-performance electrolyte systems that significantly extend voltage stability and thermal resilience.

The first system, CsBr@PAM/HA, utilizes a polyacrylamide and hyaluronic acid hydrogel matrix. This system exploits the chaotropic nature of Cs⁺ ions to disrupt the aqueous hydrogen-bonding network, enhancing ionic conductivity to 104 mS cm^-1. Through systematic salt screening, CsBr was identified as the optimal electrolyte, enabling a stable 2.0 V …

Converting Co2 Into Carbon Nanotubes Via Sequential Co2 Methanation And Methane Pyrolysis, Kaiying Wang, Hao Feng, Ahmad Helaley, Xiaoqing He, Bohong Zhang, Jie Huang, Xinhua Liang

Electrical and Computer Engineering Faculty Research & Creative Works

This study presents a sequential thermochemical catalytic process for converting CO₂ into carbon nanotubes (CNTs), achieving nearly 99% overall CO₂ conversion and solid carbon yields of up to 49% in a single pass. The overall transformation is divided into two thermodynamically favorable steps: (1) low-temperature CO₂ methanation to CH₄ over a sol-gel-prepared Ni87Ce_6.5Zr_6.5-SG catalyst, which achieved >95% CO₂ conversion at 250 °C in a single pass, and (2) subsequent methane pyrolysis to CNTs and H₂ over a Ni@Al₂O₃-IE core-shell catalyst, which showed improved stability and carbon …

Ultrasound-Enabled Refreshable Electrochemical Sensors For Cardiac Biomarker Monitoring, Mayank Garg, Heng Guo, Myeong Namkoong, Elizabeth Zhanov, Connor Malone, Md Saifur Rahman, Ayse Akcan-Arikan, Limei Tian

Faculty, Staff and Students Publications

Cardiac troponin I (cTnI) is the gold-standard biomarker for acute myocardial infarction, yet current laboratory-based high-sensitivity assays require centralized infrastructure, trained personnel, and serial testing, limiting their suitability for real-time or continuous monitoring in resource-limited settings. Point-of-care electrochemical sensors have shown promise for rapid cTnI detection, but their reliance on antibodies as biorecognition elements and redox mediator solutions, and single-use operation restricts practical translation. Here, we report an ultrasound-enabled refreshable electrochemical biosensor for sensitive, stable, and repeatable cTnI monitoring. The device employs a cTnI-specific peptide as the biorecognition element, providing enhanced stability during storage, transport, and operation. Label-free electrochemical impedance …

An Instance Segmentation Based Global Mppt Method For Pv Systems Under Partial Shading Condition, Ehab Ur Rahman, Yousef Mahmoud, Rui Bo

Electrical and Computer Engineering Faculty Research & Creative Works

Partial shading in photovoltaic (PV) systems creates multiple Local Maximum Power Points (LMPPs) on the power-voltage (P-V) curve, causing conventional Maximum Power Point Tracking (MPPT) algorithms to converge prematurely to suboptimal operating points and resulting in significant energy losses. This work proposes a novel vision-based framework that integrates computer vision with Global Maximum Power Point Tracking (GMPPT) to maximize energy harvesting in partially shaded PV systems. The proposed method captures real-time imagery of PV panels to identify cell-level shading patterns, which are subsequently mapped to module electrical characteristics to enable direct analytical estimation of the GMPP voltage. An instance segmentation …

Design Framework For Polymer Gel Treatments From A Database Of Field Projects, Baojun Bai, Munqith Aldhaheri, Mingzhen Wei

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

This study compiles and analyzes data from over 125 published field projects around the world, covering nearly 900 treated wells. Building on those detailed studies, this paper distills the most important findings into a concise, practical, and actionable framework to guide where in-situ gel treatments should be applied, how they should be designed, and how their outcomes can be evaluated. The proposed workflow guides engineers through five integrated stages: screening appropriate gel types, designing formulation and injection strategies, predicting field response, evaluating treatment performance, and conducting iterative refinement with feedback loops to adjust designs based on observed outcomes. The framework …

“Between Cultural Norms And Economic Survival: Navigating Egyptian Lower And Middle Income Women’S Challenges In The Informal Versus The Formal Work: “A Case Study From Cairo”, Rowan Mahmoud Abdelnazer

Theses and Dissertations

This study investigates the ongoing gender inequities experienced by low and middle-income women in Egypt’s formal and informal labor economy, specifically it is based in Cairo. Although there are many advances made globally on women's rights, yet women still face great challenges such as discrepancies in salary, fewer leadership roles and cultural expectations which put child-bearing duties before professional growth. On the one hand, flexible work for women in developing countries is through informal sector, which makes them vulnerable and serves as a source of their exploitation and insecurity (e.g., lack of social security; workplace hazards), on the other hand, …

Mobilizing Social Capital In Social Entrepreneurship: Strategies, Networks, And Growth In The Egyptian Context, Doaa Alaa

Theses and Dissertations

This thesis examines how social entrepreneurs in Egypt strategically mobilise social capital to access resources, legitimacy, and opportunities within a fragmented and institutionally ambiguous ecosystem. Drawing on qualitative case studies of eight legally registered, mission-driven for-profit enterprises, the study analyses how founders build and leverage offline and online networks through practices such as emotional bonding, community formation, knowledge sharing, symbolic positioning, ecosystem engagement, and digital presence. Through thematic analysis of semi-structured interviews and secondary data, the research identifies a set of relational strategies that function as core mechanisms for entrepreneurial growth in contexts where formal support structures and legal definitions …

Engineering Nanoelectrocatalytic Systems For Co2 And Nitrate Conversion Into Value-Added Chemicals, Abdelrahman Mohamed Abdelmohsen

Theses and Dissertations

The thesis addresses two major related environmental crises: nitrate pollution of water systems and the ever-increasing levels of atmospheric carbon dioxide. Both challenges are closely linked to anthropogenic disturbance of nitrogen and carbon cycles and require sustainable, energy efficient mitigation techniques. In this study, we investigate electrochemical conversion routes as a unified approach to convert these pollutants into value-added compounds: ammonia (NH3) via nitrate reduction (NO3-RR) and ethylene (C2H4) via carbon dioxide reduction (CO2RR). The first half of this work deals with the design and engineering of Cu-Zn alloy electrocatalysts for efficient NO3-RR. Tuning the alloy composition and surface nanostructure …

Re: Comment Letter For Butte Priority Soils Operable Unit (Bpsou), Draft Intermediate (60%) Remedial Design Report, Blacktail Creek Riparian Actions (Dated March 13, 2026), Emma Rott

Silver Bow Creek/Butte Area Superfund Site

No abstract provided.

Gamma Belief Functions And Fuzzy Sets And Application To Combining Predictive Models, Liping Liu

University Research

Extending classic finite frameworks to continuous settings, this paper proposes the concept of gamma belief functions and gamma fuzzy sets. It shows that both the combination of gamma belief functions and the intersection of gamma fuzzy sets remain within the gamma family, enabling their application in combining gamma probability judgments in decision making and gamma regression models in ensemble learning. Using both simulated and real datasets, and under both constant and varying dispersion assumptions, experimental results show that the combined gamma regression models closely approximate the reference models learned from the full datasets, aligning with the objectives of bootstrapping. Notably, …

Sense Of Belonging Among Undergraduate Students At The American University In Cairo: Demographic Trends, Barriers And Facilitators, Lamiaa M. Mohamed

Theses and Dissertations

A sense of belonging is widely recognized as a key determinant of undergraduate students’ academic success, well-being, and persistence in higher education. However, existing research is largely grounded in Western contexts and often emphasizes institution-level measures, with limited attention to how belonging is experienced and constructed by students in non-Western settings. This study examines undergraduate students’ sense of belonging at the American University in Cairo, focusing on factors that shape belonging and institutional practices that may strengthen it. Using a sequential mixed-methods design, the study examined 87 responses from a quantitative survey adapted from the University Belonging Questionnaire, followed by …

The Effect Of Mwcnt-Oil Impregnation Of Sintered Components On Their Wear And Corrosion Resistance, Maha Khaled Abdelfadeel

Theses and Dissertations

Powder Metallurgy (PM) offers an advantageous route for manufacturing complex and near net-shape components. Their inherent interconnected porosity that promotes the action of self lubrication compromises their structural integrity by creating pathways for corrosion and excessive wear. This research investigates the efficacy of Multi-Walled Carbon Nanotubes (MWCNTs) as a nano additive within the impregnating base oil (SN-150 base oil). An experimental matrix was designed to evaluate the influence of MWCNTs with different concentrations of 0.05, 0.1, and 0.2 wt.% and ultrasonic dispersion with varying sonication times of 30 and 60 minutes on the tribological and electrochemical performance of sintered steel …

Energy Efficient Load Balancing In Multi-Band Cellular Networks Via Reinforcement Learning, Ahmed Shoukry El Soukkary

Theses and Dissertations

This thesis investigates energy-efficient load balancing in homogeneous multi-band cellular networks through the joint design of user association (UA) and transmit power allocation (PA). The original mixed-integer nonlinear formulation is decomposed into two coupled yet tractable subproblems: a UA stage and a PA stage for high-frequency bands. For UA, a SINR-ratio-based heuristic is proposed to prioritize users that are most sensitive to suboptimal band assignments, and it is benchmarked against a Max- SINR baseline. For PA, the high-band power control problem is addressed using reinforcement learning, where a Proximal Policy Optimization (PPO) agent learns power levels and band-activation decisions under …

Scruples Before Religion: Muslim Waraʿ Of The Formative Period, Omar Laaroussi

Theses and Dissertations

This thesis studies the conceptual history of waraʿ and its role as a normative paradigm existing in the formative centuries of the Islamic world. To do so, I consider the Hellenic concepts that ground Near Eastern understandings of virtue and piety before the rise of Islam. This, I then use to contextualise a focused discussion on the textual history of waraʿ before moving on to discuss its properties in a ascetic social-world through the analysis of those very texts. I attempt to place those properties in conversation with modern philosophers’ work on disciplinary regimes and their impacts upon the self. …

Integrative Assessment Of Body Composition And Micronutrient Status In An Adult Egyptian Population, Roua Aref Nouh

Theses and Dissertations

Integrative Assessment of Body Composition and Micronutrient Status in an Adult Egyptian Population: A Functional and Biochemical Approach

Obesity and metabolic dysfunction are increasingly recognized as heterogeneous conditions that cannot be sufficiently characterized by body mass index (BMI) alone. Alterations in body composition, particularly central adiposity and skeletal muscle mass, may coexist with micronutrient imbalances even among individuals who fall outside conventional BMI-based obesity classifications. In clinical settings, such metabolic vulnerability is frequently accompanied by non-specific functional symptoms, highlighting the need for integrative assessment approaches that extend beyond weight-centered metrics. This cross-sectional study aimed to investigate the associations between micronutrient …

From Aspiration To Obligation: A Contractual Sustainability Framework For The Egyptian Construction Industry, Salma Ali

Theses and Dissertations

The construction industry is responsible for approximately 40% of global energy consumption and 35% of total waste generation, making it one of the most significant contributors to the global sustainability challenge. In Egypt, that challenge takes a specific contractual form. Egypt’s construction sector contributes approximately 23% of national energy consumption, yet the survey findings reveal that 63.5% of construction professionals report that sustainability clauses rarely or never appear in contracts, and only 11.5% confirm the presence of enforceable provisions with measurable targets. This gap is structural rather than attitudinal. Competitive procurement penalises voluntary sustainability investment, and without contractual obligation, awareness …

Flexible-Mode Multi-Skilled Resource-Constrained Project Scheduling Problem With Setup Times: Application In The Oil And Gas Industry, Safinaz M. El Dawody

Theses and Dissertations

Turnaround maintenance (TAM) in the petroleum refining sector requires coordinating geographically dispersed project portfolios under stringent resource, schedule, and budget constraints. Conventional scheduling models treat tasks in isolation, failing to account for shared resources, crew fatigue, or inter-site transit. To bridge this gap, this study introduces and empirically validates a Flexible-Mode Multi-Skilled Resource-Constrained Project Scheduling Problem with Setup Times (FM-MS-RCPSP-ST). Applied to a real-world portfolio of 76 TAM projects across five governorates in Egypt, the framework is operationalized through an 11-stage pipeline integrating NSGA-II multi-objective optimization, GIS-based routing, and 500-trial Monte Carlo disruption simulations.

Results demonstrate that incorporating mandatory crew-rest …

Self-Healing Qos Queue Management, Anonymous

Defensive Publications Series

A self-healing quality of service (QoS) queue management system and method are disclosed for a multi-service network node. Ingress traffic is classified by a class of service (COS) map and forwarded by a scheduler to a normal queue set of per-service egress queues. A queue monitor aggregates per-queue telemetry, including credit accumulation statistics, drops, and depth, and feeds the telemetry to a self mapping correction engine over a feedback path. The correction engine distinguishes a queue freeze from transient congestion by detecting that a queue has available credits yet is not draining, and in response rebinds the affected service to …

Synchronized Multi-Line Digital Signal Generation Using Plural Independent Software-Triggered Serializer Peripherals With Open-Loop Fixed Start-Skew Compensation, Gerard Ziemski

Defensive Publications Series

A method is disclosed for generating two or more time-aligned digital output signals — for example a differential pair such as the USB D- / D+ data lines, or more generally any paired, differential, multi-phase, polyphase, quadrature, or multi-channel synchronized output — on a microcontroller or system-on-chip that provides plural independent hardware serializer peripherals (such as two or more SPI master transmit/MOSI engines) but provides no single peripheral and no dedicated hardware capable of driving the desired multi-line signal directly.

Each output line is assigned its own serializer and preloaded with a precomputed bitstream. The serializers are started by back-to-back …

Dynamic Video Resolution For Background Playback, Daniel Vik, Jugal Manjeshwar

Defensive Publications Series

This document describes techniques for a context-aware media scaling system that dynamically adjusts the resolution for video playback on devices (e.g., resource-constrained devices such as smart televisions) based on the current state and navigational context of a user interface (UI). The system determines the current state by actively tracking an application’s view context or page identifier (ID) to detect navigational transitions between a primary viewing UI (e.g., a “Watch” page) and a secondary navigational UI (e.g., for browsing content). The system maps the current state to a specific resolution policy. For example, for a transition from the primary viewing UI …

Calibration Of A Quantum Random Number Generator System Using Machine Learning, Ashish Kundu, Ramana Kompella, Peng Zhao, Eneet Kaur

Defensive Publications Series

Disclosed are techniques for calibrating a quantum random number generator (QRNG) system using machine learning to detect noise, drift, and entropy degradation across devices and the QRNG pipeline. One or more models evaluate device data, entropy quality, and system conditions to determine whether recalibration is needed, which devices should be recalibrated, and when recalibration should occur. The techniques may also support predictive recalibration and calibration planning to improve entropy quality and overall QRNG reliability.

Autonomous Multi-Agent System For Declarative Data Center Lifecycle Management, Ananya Simlai, Niccolò Cascarano

Defensive Publications Series

Conventional data center management can involve manual workflows or static declarative systems that may not effectively adapt to real-time conflicts or complex events, potentially resulting in unpredictable deployment timelines and increased operational risk. Systems and methods are described that can utilize a multi-agent ecosystem for managing data center resources. In such a system, specialized, autonomous software agents can communicate and negotiate with one another through a medium such as an asynchronous fabric to interpret high-level declarative goals. The agents may autonomously orchestrate complex actions, resolve resource conflicts, and adapt to changing conditions. This approach can improve operational resilience and agility …

Real-Time Generative Audio Description Insertion Using Vision Language Analysis, Nikita Agarwal

Defensive Publications Series

Standard audio description tracks are manually scripted and pre-recorded, leaving vast amounts of uncurated media content inaccessible to visually impaired users as the audio description tracks are only available for a small fraction of premium media content. To address this limitation, the disclosed technology details a process for generating real-time audio descriptions for media content. Video frames are analyzed locally by an on-device vision language model during identified silence windows or gaps within the media content. A text summary of the visual action is generated and subsequently converted to speech. The playback speed of the synthesized narration is dynamically adjusted …

Adaptive Compliance-Aware Secure Gateway Selection And Disaster-Aware Autonomous Tunnel Rehoming For Secure Service Edge (Sse) Environments Using No-Mutation Shadow Probing And Policy-Equivalence Gating, Faizan Amjad Mohammed, Ashwin Kumar Ravichandran, Pradeepan K Kannawadi

Defensive Publications Series

Proposed herein is a framework to enable adaptive, compliance-aware secure service edge (SSE) secure gateway selection and autonomous tunnel rehoming for enterprise software-defined wide area network (SD-WAN) edges in both steady-state and disaster conditions. The proposed framework uniquely combines no-mutation controller-side shadow probing, hard policy-equivalence gating, and transactional canary/staged rollout with deterministic rollback before production cutover. The result is safer failovers and better application performance while preserving compliance boundaries and reducing outage blast radius.

Dynamic Health-Aware Agent Card Extensions To The Agent-To-Agent (A2a) Protocol For Fitness-Based Orchestration In Multi-Agent Systems, Robert Barton, Yathi Udupi, Maithri V M, Jerome Henry

Defensive Publications Series

A service is proposed herein that updates Agent-to-Agent (A2A) cards in real-time regarding the health and performance of a particular agent, including information represented in the particular agent's card, so that other agents have better information before selecting the particular agent for a given task/operation.

Ruptures: A Village Child’S Diary In Colonial Algeria, Abderrahmane Azzi

Journal of Amazigh Studies

NA

Akhiate, Brahim. The Amazigh Revival: A Memoir Of Its Birth And Progression, Andrew Long

Journal of Amazigh Studies

NA

Examining The Impact Of The Palisades And Eaton Fires On Air Quality In Los Angeles, Ryan Edward Glenn

Earth Sciences Undergraduate Senior Theses

Wildland-urban-interface (WUI) fires in the US are increasing in frequency and intensity with disproportionately large impacts on air quality and human health. In January 2025, the Palisades and Eaton wildfires swept across the Los Angeles Basin, burning residential areas and destroying vegetation. Despite their significance, WUI fires remain understudied compared to wildland fires, especially in regard to emissions composition. Here, I utilize a combination of field samples, modeling, and remotely-sensed datasets to survey the emissions profiles and variations during the 2025 Palisades and Eaton wildfires. I find that 75.1% of Los Angeles County was exposed to surface PM2.5 rated ‘unhealthy’ …

Composing Playgrounds, Rebecca Suju Abraham

Dartmouth College Master’s Theses

This thesis explores music composition as the design of “playgrounds”: structured systems that invite participation, interaction, and the emergence of shared musical experience. Drawing on a background in engineering and a practice rooted in improvisation and community, I investigate how compositional authority can be exercised through the creation of constraints instead of fixed outcomes. These systems are structured enough to support coordination and open enough to allow for play and collective agency. The work is situated within practice-based research and engages qualitative methods to reflect on a series of projects developed over the course of my MFA in Sonic Practice. …

Destination “Burning River”: Restoration And Placemaking In A Rust Belt City, Mia Compton-Engle

Geography Undergraduate Senior Theses

In 1969, the Cuyahoga River in Cleveland, Ohio caught fire from industrial pollution. Media narratives reframed the river fire as a symbol of environmental degradation, discursively transforming the Cuyahoga River from a place of industrial sacrifice to a place deserving ecological stewardship. Consequently, the river fire catalyzed the modern American environmental movement and local urban river restoration, materially transforming the Cuyahoga River from a place of industrial waste to a place of natural beauty and socioeconomic opportunity. Thus, urban river restoration presents an opportunity for novel placemaking: a local microcosm of the global turn towards urban sustainability. However, there is …