Digital Commons Network^™

Custom Permission Misconfigurations In Android: A Large-Scale Security Analysis, Rui Li, Wenrui Diao, Debin Gao

Research Collection School Of Computing and Information Systems

Android’s popularity is due to its openness and vast app ecosystem. Global developers can use Android Studio and rich Android APIs to create their apps. Within this ecosystem, Android permissions play a crucial role in managing access to resources, with system permissions controlled by system apps and custom permissions declared by third-party apps. However, the security of custom permissions has not received enough attention from the mobile security community, resulting in a lack of thorough evaluation of security practices for app developers using custom permissions. This study systematically evaluated the misconfiguration of custom permissions by Android app developers. It is …

Chain Of Preference Optimization: Improving Chain-Of-Thought Reasoning In Llms, Xuan Zhang, Chao Du, Tianyu Pang, Qian Liu, Wei Gao, Min Lin

Research Collection School Of Computing and Information Systems

The recent development of chain-of-thought (CoT) decoding has enabled large language models (LLMs) to generate explicit logical reasoning paths for complex problem-solving. However, research indicates that these paths are not always deliberate and optimal. The tree-of-thought (ToT) method employs tree-searching to extensively explore the reasoning space and find better reasoning paths that CoT decoding might overlook. This deliberation, however, comes at the cost of significantly increased inference complexity. In this work, we demonstrate that fine-tuning LLMs leveraging the search tree constructed by ToT allows CoT to achieve similar or better performance, thereby avoiding the substantial inference burden. This is achieved …

Revisiting Masked Auto-Encoders For Ecg-Language Representation Learning, Hung Manh Pham, Aaqib Saeed, Dong Ma

Research Collection School Of Computing and Information Systems

We propose C-MELT, a novel framework for multimodal self-supervised learning of Electrocardiogram (ECG) and text encoders. C-MELT pre-trains a contrastive-enhanced masked auto-encoder architecture using ECG-text paired data. It exploits the generative strengths with improved discriminative capabilities to enable robust cross-modal alignment. This is accomplished through a carefully designed model, loss functions, and a novel negative sampling strategy. Our preliminary experiments demonstrate significant performance improvements with up to 12% in downstream cardiac arrhythmia classification and patient identification tasks. Our findings demonstrate C-MELT's capacity to extract rich, clinically relevant features from ECG-text pairs, paving the way for more accurate and efficient cardiac …

User Acceptance Of Advice By Ai Agents: Expectation-System Fit Perspective, Jingyuan Cai, Fiona Fui-Hoon Nah

Research Collection School Of Computing and Information Systems

Algorithms have increasing influence on our daily decisions, especially when the recommendations are presented by human-like AI agents. This study applies the Theory of Effective Use to investigate how the fit between the user’s role expectation for an AI agent and the agent’s interaction style impacts AI advice adoption. We proposed a new concept termed Perceived Expectation-System Fit (PESF) and empirically examined its impact on user perceptions and advice acceptance. We found that low PESF reduces advice acceptance by diminishing cognitive and affective trust in the AI agent. Furthermore, increased algorithm transparency increases PESF's impact on decision-making. Our findings provide …

Impact Of Irrigation Systems On Water Use And Water Productivity: A Case Study Using Aquacrop In Khartoum, Sudan, Abdalhakam Almagzoop

Department of Agricultural and Biological Systems Engineering: Masters Project Reports

Water scarcity significantly challenges agricultural productivity in arid regions like Khartoum, Sudan. This study evaluates the impact of three irrigation systems—furrow, sprinkler, and surface drip—on the water use and productivity of sorghum (Sorghum bicolor L.) under different climatic conditions using the AquaCrop model. Simulations were conducted for three representative years: a wet year (2022), a normal year (2015), and a dry year (2018). The results demonstrate that irrigation substantially improved water use efficiency and crop yield compared to non-irrigated (rainfed) conditions. Rainfed crops resulted in lower biomass, harvest index, and yield, particularly in the dry year, highlighting the importance …

Enhancing Water Sustainability In North Africa: Literature Review And Synthesis Of Current Knowledge Gaps In Sudan, Osman M. A. Adam

Department of Agricultural and Biological Systems Engineering: Masters Project Reports

This study delves into the critical role of groundwater in addressing global water challenges, with a focus on the Nubian Sandstone Aquifer System (NSAS) in north Africa. Groundwater constitutes a source of potable water, irrigation, and industrial use, especially in arid regions where surface water is limited. We analyzed the status of water quantity, withdrawals, recharge, and geological characteristics in the NSAS, specifically in Sudan, Egypt, and Libya. Though the NSAS is largely an untapped resource, water withdrawals from the NSAS in Egypt, Sudan, and Libya are projected to increase substantially from 2000 to 2100 due to population growth, with …

Development And Characterization Of Organic Electrocatalysts For Use In Zinc-Air Batteries, Christopher John Merkel

Department of Chemical and Biomolecular Engineering: Dissertations, Theses, and Student Research

The global deployment of solar photovoltaic and wind power is projected by the International Energy Agency as the primary pathway to reduce dependence on fossil fuels. However, these technologies face a critical bottleneck: their inherently intermittent power generation. For “intermittent renewables” to become the dominant source of electrical energy, efficient energy storage systems are essential. Current storage solutions are not viable on a global scale due to material scarcity, safety concerns, and high capital costs. Among emerging technologies, zinc-air batteries (ZABs) have garnered significant interest. ZABs offer a theoretical energy density five times greater than traditional lithium-ion batteries, utilize safe …

Impacts Of Stream Bed Adjustment On Local Bridge Morphology At Highway 281, Molly G. Likins

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

Nebraska sand-bed rivers have long been a part of sediment transport studies and have been used in the development of numerous well-known empirical bedload equations. Some of these studies have shown how adjustments in streambed elevation led to changes in local stream morphology. The sand-bed rivers of Nebraska are highly susceptible to such changes due to their wide, shallow cross-sections and erodibility. The objective of our study is to synthesize a hydrodynamic model with high-resolution field data and improved methods of representing sediment transport to better predict both short and long-term channel adjustments for an aggraded sand-bed river.

The field …

Numerical Study On The Behavior Of Natural And Recycled Aggregate Concretes, Shahriar Mardpour

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

This thesis investigates the mechanical behavior of natural and recycled aggregate concretes (NAC and RAC) using a multi-phase numerical approach to predict performance. Growing interest in sustainable materials has led to using recycled concrete aggregates (RCA) to replace natural aggregates, creating Recycled Aggregate Concrete (RAC). Due to their different structural components, RAC and NAC exhibit varying mechanical properties, particularly in strength and durability.

This study validated tension and bending (flexural) test models by comparing numerical results with similar models from the literature. Following validation, a multi-phase approach modeled NAC and RAC for the bending (flexural) and tension tests, providing a …

Not All Samples Are Created Equal: Task-Aware Informative Sampling And Adaptive Inference For Efficient Edge Ai, Rebati Gaire

School of Computing: Dissertations, Theses, and Student Research

The rapid proliferation of Internet of Things (IoT) devices has resulted in an unprecedented influx of data generated at the edge by billions of sensors. Traditional approaches relying on cloud-based processing are increasingly inadequate due to constraints in bandwidth, latency, and privacy. Edge computing has emerged as a transformative paradigm, enabling real-time data processing and decision-making by decentralizing computation to the edge. While the integration of deep learning into edge environments—termed edge intelligence—promises autonomous and personalized operations, it is hindered by challenges such as limited computational resources, energy constraints, and data redundancies.

This thesis addresses these challenges by presenting three …

Using Symbolic Execution To Analyze The Hardware Tcp Protocol, Nianhang Hu

School of Computing: Dissertations, Theses, and Student Research

As the demand for high performance and flexible networking capabilities increases, the shift from software to hardware implementations of stateful networking functions (such as TCP) is becoming increasingly important. This transition not only enhances processing efficiency in modern networking environments where data transmission rates are rising, but it also reduces the inherent CPU overhead found in software implementations, allowing hardware devices to handle network traffic more efficiently. However, validating the correctness of these hardware designs poses significant challenges due to the complex timing requirements and the vast input space associated with packet-level properties.

The verification of packet-level properties requires coverage …

Characteristics Of High-Risk Bipolar Bone Loss Lesions Using 3-Dimensional Imaging, Petar Golijanin, Justin Arner, Claire Ryan, Qais Zai, Liam Peebles, Annalise Peebles, Phob Ganokroj, Ryan Whalen, Stephanie Eble, Danielle Rider, Srdjan Ninković, Matthew Provencher

Department of Orthopaedic Surgery Faculty Papers

BACKGROUND: The concept of on-track versus off-track bone lesions in glenohumeral instability continues to evolve. Although much has been ascertained from an original biomechanical model, bony pathological changes, especially on 3-dimensional (3D) imaging, have not been fully evaluated.

PURPOSE: To compare the differences in on-track versus off-track lesions to characterize glenoid and humeral head bone defects using 3D modeling software.

STUDY DESIGN: Cross-sectional study; Level of evidence, 3.

METHODS:A consecutive cohort of 75 patients with recurrent anterior instability, with evidence of Hill-Sachs lesions (HSLs) and
glenoid bone loss (GBL) and a mean age of 27.1 years (range, 18-48 years), were …

Strategies For Competitive Advantage In Libraries And Information Centers, De-Graft Johnson Dei, Linda Anane-Donkor

Library Philosophy and Practice (e-journal)

Libraries and information centers keep experiencing sluggish growth due to the absence of an integrated and coherent strategy that can be deployed to enable them to be competitive, have a competitive advantage, and gain market position. This study, therefore, sought to assess the strategies for competition in libraries and information centers and develop a framework that can be deployed in libraries and information centers for competitive advantage. The study adopted a conceptual and qualitative approach to research. Based on the review and analysis, the researcher developed a framework that suggests that technology (infrastructure, social media systems, gamification, and artificial intelligence) …

Leveraging Geo-Ai To Evaluate Conservation Land Conditions In Nebraska, Usa, Fnu Jahangeer

Community and Regional Planning Program: Theses

Wetlands are among the most vital natural resources, offering extensive ecosystem services that benefit human societies. However, human activities and disturbances have led to widespread wetland degradation and loss worldwide. Key factors contributing to this degradation include pollution, exploitation of biological resources, modifications to natural systems, and agricultural and aquacultural practices. This study examines wetland conservation efforts in Nebraska, focusing on three main areas: (1) AI-Driven Applications in Google Earth Engine for Surface Water Monitoring, Assessment, and Management; (2) Assessing Wetland Hydrological Performance under Three Conservation Programs in Nebraska through AI-Driven Google Earth Engine Analysis; and (3) Identifying Potential Wetland …

Artificial Intelligence And Cracks In The Foundation Of Intellectual Property, Robin Feldman

UC Law Journal

Our implicit image of progress and the standards we use to calibrate human contribution to progress are quietly at risk from the onslaught of artificial intelligence (AI). AI has the potential to significantly shrink the pool of creative work that is protectable by intellectual property (IP) law and the range of information that is protectable, as well as shrinking the value proposition of IP regimes themselves.

As society faces this changing landscape, we must tread carefully to distinguish fears about AI from the task of defining the boundaries of intellectual property, whose theoretic concepts aren’t designed to bear such weighty …

Harnessing Collective Structure Knowledge In Data Augmentation For Graph Neural Networks, Rongrong Ma, Guansong Pang, Ling Chen

Research Collection School Of Computing and Information Systems

Graph neural networks (GNNs) have achieved state-of-the-art performance in graph representation learning. Message passing neural networks, which learn representations through recursively aggregating information from each node and its neighbors, are among the most commonly-used GNNs. However, a wealth of structural information of individual nodes and full graphs is often ignored in such process, which restricts the expressive power of GNNs. Various graph data augmentation methods that enable the message passing with richer structure knowledge have been introduced as one main way to tackle this issue, but they are often focused on individual structure features and difficult to scale up with …

Full Issue Of The Journal Of The Assembly For Expanded Perspectives On Learning Volume 29, Wendy Ryden

The Journal of the Assembly for Expanded Perspectives on Learning

Full Issue of The Journal of the Assembly for Expanded Perspectives on Learning Volume 29.

Chronic Illness Education 2024: Incremental Diet And Activity Changes To Improve Cardiovascular Health, Carter Dunaway, Jonah Kornbluh, Kit Tran, Naya Pabla, Olivia Jeakle, Zaid Saadeh

Patient Education Projects

No abstract provided.

The Influence Of Trauma History On Opiate Use Disorder In An Urban Treatment Facility In Pennsylvania, Roxanne Jeffries-Baxter, Christopher J. Burant, Joachim G. Voss

Student Scholarship

Background: Opioid use disorder is one of the most severe forms of substance use disorder and is associated with high morbidity and mortality. Opiate overdose deaths in the US are increasing every year, claiming over 100,000 lives in 2022. Psychological trauma exposure and post-traumatic stress disorder are major health problems in the United States and may contribute to the development of an opiate use disorder. The purpose of this study was to examine the association of psychological trauma exposure and post-traumatic stress disorder with opiate use disorder. Methods: This study used a retrospective design with a convenience sample size of …

It Takes A Village: Why And How Georgia Should Afford Greater Protection To Juveniles During Police Interrogations, Lillie Tate Andrews

Mercer Law Review

On June 27, 1998, Lori Duniver discovered that her five-year-old daughter, Devan, was missing from her home in New Philadelphia, Ohio. The following day, Devan’s body was found in a wooded area near her home. The Duniver family’s twelve-year-old neighbor, Anthony Harris, was ultimately convicted of Devan’s murder and sentenced to a term of incarceration to last until his twenty-first birthday. However, on June 7, 2000, the Court of Appeals of Ohio reversed his conviction on the ground that the juvenile court had improperly denied a motion to suppress his confession, which was coerced in violation of his Fifth Amendment …

Under Observation: Wilson V. Inthachak Shows That Georgia’S Emergency Care Statute Still Lacks A Uniform Interpretation, Thomas S. Kiser

Mercer Law Review

This year, pro- and anti-tort reform forces met on the battleground of O.C.G.A. § 51-1-29.5(c), a statute that gives doctors increased protection from malpractice claims when they provide “emergency medical care in a hospital emergency department . . . .” When healthcare providers or hospitals are sued for negligence under these circumstances, the plaintiff must have clear and convincing evidence that the provider was grossly negligent, a greater hurdle than an ordinary medical malpractice plaintiff would need to overcome. While the statute is crystal clear in its purpose, Georgia courts have not reached a consensus regarding its application. Wilson v. …

Lgbtq+ College Students’ Willingness To Access Campus Health Services At A Midsized, Urban Christian University: A Study On Disparities, Samual J. Piatt, Christian Williams, Frecia Gonzalez

SPARK Symposium Presentations

Introduction

LGBTQ+ college students face inequitable health outcomes in both mental health and physical health versus non-LGBTQ+ counterparts (The Trevor Project, 2023), (Brittain et Dinger, 2015). LGBTQ+ students experience higher unwillingness and disparities in care access due to negative perceptions of and experiences with UHS providers (Hood et al, 2019). Research indicates that better provider LGBTQ+ cultural awareness contributes to a more affirming space which in turn benefits LGBTQ+ healthcare (Parmenter et al, 2020), (Prasad et al, 2023).

Methods

A 2024 cross-sectional study assessed the comfort levels of LGBTQ+ college students in accessing student health services, explore how affirming healthcare …

Incorporating Families Experiencing Disabilities Into The Rhythm Of Small Groups At Saturn Road Church Of Christ, Robby John

Doctor of Ministry Theses and Dissertations

This project addresses the critical gap in the inclusion of families experiencing disabilities within small groups at Saturn Road Church of Christ. The primary aim is to develop a curriculum that raises awareness among small group leaders about this significant issue. To provide a theological reflection on the necessity of such a venture, I explored the topic through the lens of four theological pillars: the image of God, the incarnation, ecclesiology, and eschatological hope. This exploration revealed several key themes that serve as foundational building blocks for the awareness curriculum. Ultimately, the final artifact is an awareness curriculum designed to …

When The Taker Goes Broke: Takings Claims In Municipal Bankruptcy, Joshua Kayne Kaufman

University of Chicago Law Review

When a municipality takes property, the former owners can allege a violation of the Takings Clause and try to recover just compensation. But what should happen when the municipality goes broke and enters municipal bankruptcy? Can the municipal Bankruptcy Code empower judges to release municipalities from their obligation to pay just compensation through a discharge? Or does the Takings Clause provide special constitutional protection to claims for just compensation from a municipality that immunizes the claims from discharge? This issue has played out in municipal bankruptcies in Detroit, Michigan; Stockton, California; and Puerto Rico—and courts are deeply divided on the …

Contractual Commitments And The Right To Change Religions, Michael A. Helfand

North Carolina Law Review

No abstract provided.

Viewing The Unseen: Requesting Accommodation For Non-Visible Disabilities Under The Ada After Kelly V. Town Of Abingdon, Jason Naulty

North Carolina Law Review

No abstract provided.

Interrogating Miranda’S Custody Requirement, Lauren E. Clatch

North Carolina Law Review

No abstract provided.

Disability Discrimination By Clinical Algorithm, Elizabeth Pendo, Jennifer D. Oliva

North Carolina Law Review

No abstract provided.

Case Brief: In Re R.A.F.–Beware Of The "Haunting Specter", Sam W. Scheipers

North Carolina Law Review

No abstract provided.

Case Brief: Carolina Youth Action Project V. Wilson, Megan Mills Rash

North Carolina Law Review

No abstract provided.