Engineering Commons^™

Anhydrous Ammonia As A Hydrogen Carrier Fuel For Solid Oxide Fuel Cells, Cole Anthony Wilhelm

Dissertations - ALL

In the years since humans realized that our actions could have profoundly harsh effects on the environment, we have been searching for ways to minimize our impacts, while also maintaining the same standard of living. One of the actions with such effects is power generation using fossil fuels, which has long been the largest source of energy. While efforts should be made to improve the efficiency of these power generation plants, we should also work to identify alternative opportunities for power generation without the use of fossil fuels. Some of these opportunities include hydroelectric, photovoltaic, wind, nuclear, and the combustion …

Dynamic Resource Allocation For Wireless Networks And Radar Systems Via Deep Reinforcement Learning, Ziyang Lu

Dissertations - ALL

The rapid advancement of wireless communication technologies and the proliferation of smart devices have led to increasingly complex and dynamic network environments. These developments have posed significant challenges to traditional radio resource management (RRM) techniques, which often struggle with scalability, adaptability, and real-time decision-making. In response to these limitations, this dissertation explores the application of advanced machine learning, particularly deep reinforcement learning (DRL), to develop intelligent, adaptive, and data-efficient solutions for resource management in wireless networks and radar systems. We begin by addressing joint channel access and power control in wireless interference networks using centralized, distributed, and federated multi-agent DRL …

Poly(Pyridinium Salt)S Containing 9,9-Bis(4- Aminophenyl)Fluorene Moieties With Various Organic Counterions Exhibiting Both Lyotropic Liquid-Crystalline And Light-Emitting Properties, Pradip K. Bhowmik, David King, Haesook Han, Andras F. Wacha, Matti Knaapila

Chemistry and Biochemistry Faculty Research

Main-chain conjugated and non-conjugated polyelectrolytes are an important class of materials that have many technological applications ranging from fire-retardant materials to carbon-nanotube composites, nonlinear optical materials, electrochromic materials for smart windows, and optical sensors for biomolecules. Here, we describe a series of poly(pyridinium salt)s-fluorene containing 9,9-bis(4-aminophenyl)fluorene moieties with various organic counterions that were synthesized using ring-transmutation polymerization and metathesis reactions, which are non-conjugated polyelectrolytes. Their chemical structures were characterized by Fourier transform infrared (FTIR), proton (1H) and fluorine 19 (19F) nuclear magnetic resonance (NMR) spectrometers, and elemental analysis. They exhibited polyelectrolytic behavior in dimethyl sulfoxide. Their lyotropic liquid-crystalline phases were …

Grades Are Bugs, Jordan Freitas

Computer Science Faculty Works

This paper argues that grades are bugs in our educational system, undermining desired behaviors and outcomes. Grades were introduced into higher education for purposes directly at odds with the goals of inclusive pedagogy today, as well as the neuroscience of human motivation and learning. Students enter computer science programs from increasingly varied backgrounds and experiences, and face a rapidly evolving landscape of prospective career paths while higher education costs in the United States are ever increasing. Computer science educators have a responsibility to adapt and carefully re-examine typical approaches to all aspects of the learning environments we build and curricula …

High-Frequency Impedance Spectroscopy: Measurement Reproducibility, Electromagnetic, And Ionic Effects In Cylindrical Lithium-Ion Cells, Matthew R. King, Paul T. Coman, Rafid Mollah, Md Rayhan Khan, Saranraj Karuppuswami, Taylor R. Garrick, Ralph E. White

Faculty Publications

Accurate high-frequency electrochemical impedance spectroscopy (HF EIS) is critical for understanding lithium-ion battery (LIB) behavior under AC perturbations, relevant to electric vehicle systems and charging infrastructure. However, measurements at high frequencies are often distorted by external electromagnetic interference, poor contact quality, and wiring artifacts. This study investigates four experimental testbench configurations for HF EIS of cylindrical LIBs, highlighting the impact of contact resistance, Faraday shielding, wire twisting, and calibration. A coupled electrochemical-electromagnetic model is developed to isolate and analyze the skin effect and frequency-dependent electrolyte conductivity. Results show that spot-welded connections, twisted and shielded wiring, and calibration within a Faraday …

Corrosion Mitigation And Monitoring Of Bridge Tendons And Failure Forecasting Of Wastewater Force Mains, Stanley Chike Agbakansi

USF Tampa Graduate Theses and Dissertations

Corrosion remains a significant threat to civil infrastructure, resulting in costly repairsand potential structural failures. This dissertation addresses three critical aspects of corrosion: mitigation and monitoring of post-tensioned bridge tendons, and failure forecasting of wastewater force mains due to internal corrosion.

First, the research investigates the effectiveness of corrosion inhibitors (CIs) applied via pressure injection (impregnation) in post-tensioned tendons. The protective mechanisms and long-term performance of various inhibitors were evaluated to identify the most effective formulations. Among the tested inhibitors, MCI-2020 — a water-based, migratory, mixed-type corrosion inhibitor — demonstrated the most promising results, showing excellent corrosion protection while preserving …

Keynote: Robotizing The Picking And Sorting With Grabtm And Sorttm, Lars Eilertsen

International Material Handling Research Colloquium

No abstract provided.

Paving The Way For The Future Of Robotic Compact Storage And Retrieval Systems: An Innovative Conceptual Design, Mahmut Tutam

International Material Handling Research Colloquium

No abstract provided.

A Multi-Model Tool For Evaluating Sustainability Levels Of Last Mile Logistic Services Developed By Drones, Maria Grazia Gnoni, Fabiana Tornese, Lorenzo Rubrichi

International Material Handling Research Colloquium

No abstract provided.

Estimating Order Picking Distances Using Machine Learning, Hector J. Carlo, Carlos A. Morel-Figueroa, Victoria Méndez-González, Yamilette Boscio-Sánchez, Alex Demel-Pacheco

International Material Handling Research Colloquium

No abstract provided.

Enhancing Social Sustainability In Parcel Hubs Using Discrete Event Simulation And Multi-Objective Optimization, Harald Steinkellner, Domenik Kaever, Christoph Rockenschaub

International Material Handling Research Colloquium

No abstract provided.

Throughput Comparison Between An Amr-Based Sorting System And A Loop Sorter: A Case Study On High-Performance Parcel Sorting, Moritz Roidl

International Material Handling Research Colloquium

No abstract provided.

Supply Chain Robustness And Resilience Modeling Using Bayesian Networks, Md Sarder, Seyedmohsen Hosseini

International Material Handling Research Colloquium

No abstract provided.

Assess Picker Postural Risk Using Real-Time Posture Estimation Technology (Openpose) For Robotic Mobile Fulfillment Systems, Ching-Jung Ting, Tzu-Heng Kao, Kuan-Ting Liu

International Material Handling Research Colloquium

No abstract provided.

Machine Learning Approach For The Operation Of Puzzle-Based Storage Systems, Tal Raviv, Yossi Bukchin

International Material Handling Research Colloquium

No abstract provided.

Autonomous Mobile Robots Amrs Equipped With Picking Robot For Order-Picking In Storage Rack, Tone Lerher, Jakob Marolt, Luka Bizjak, Boris Jerman

International Material Handling Research Colloquium

No abstract provided.

Proof-Of-Concept Implementation Of A Drone-Enabled Material Handling System In Manufacturing, Julio Jimenez-Sarda, Daniel F. Silva, Alice E. Smith

International Material Handling Research Colloquium

No abstract provided.

Considerations For Implementing Ai In Warehousing Environments, Irma Adams, Nicolas Iman, Natalie S. Cherbaka

International Material Handling Research Colloquium

No abstract provided.

Tactical Recovery Planning In A Strategic Single-Sourced Supply Chain After Disruption, Sarvesh Gore, Jose D. Porter Phd

International Material Handling Research Colloquium

No abstract provided.

Shared Autonomy Open Logistics Systems: Definitions, Examples, And Related Literature, Jennifer Pazour

International Material Handling Research Colloquium

No abstract provided.

Algorithmic Approaches To Path Planning For Collaborative Robot-To-Robot Picking, Christopher Reining, Pia Schreynemackers, Niklas Jost, Alice Kirchheim

International Material Handling Research Colloquium

No abstract provided.

Circular Thinking In A Technological Age: Designing For A Regenerative Future, Mohammed Ali Berawi, Perdana Miraj, Mustika Sari

CSID Journal of Infrastructure Development

Architecture, engineering, and construction sector is experiencing challenges related to environment and economic aspects. It consumes vast amounts of resources and energy and contributes heavily to global carbon emissions. Academics and industry leaders are trying to explore various strategies to combat climate change by shifting toward circularity. It is a systems-based approach that prioritizes regenerative design, responsible consumption, and closed-loop resource use. At the heart of this shift lies the interplay between circularity, technology, and the environment that can reshape how we live, produce, and consume. But this transformation is not simply about adopting greener practices; it’s about rethinking the …

The City As The Classroom: The Case Of “Start ‘Em Young Advocacy” At Silliman University, Philippines, Novee Elarmo Maestrecampo Jr., Giovanni Tuballa Macahig

CSID Journal of Infrastructure Development

This case study highlights the value of engaging with communities as real-world environments for practical and reflective learning. It suggests that students can develop insights and acquire knowledge through interactions with diverse groups and locations, even within urban settings. The paper presents the experience of implementing the “Start ‘em Young Advocacy,” a student-led, environment-focused, and project-based initiative within the Civic Welfare Training Service (CWTS) under the National Service Training Program (NSTP) at Silliman University, Philippines. In collaboration with the City Social Welfare and Development Office (CSWDO), CWTS students worked with thirty daycare centers. Using Kolb’s Experiential Learning Theory as a …

Barriers To Learning Exposure In Construction 4.0: Perspectives From Built-Environment Students, Olajide Julius Faremi, Habeeb Abiodun Arowolo

CSID Journal of Infrastructure Development

The ongoing digital transformation of the construction industry, known as Construction 4.0, requires students in built-environment programs to gain adequate exposure to emerging technologies. Despite this need, many faces significant barriers to meaningful engagement. This study explores the factors limiting students’ learning experiences related to Construction 4.0 in Nigerian universities and polytechnics. Using a stratified random sampling method, 154 students from one university and one polytechnic were surveyed through a structured questionnaire. Data were analyzed using frequency distribution, relative importance index, and the Mann-Whitney test. Results identify key obstacles such as limited peer collaboration, insufficient funding and resources, and weak …

Assessing The Impact Of Nigerian Seaports’ Operational Performance On The Construction Sector’S Contribution To Gdp, Ismail Gbolahan Dere, Joel Ademola Ojekunle

CSID Journal of Infrastructure Development

The construction sector in Nigeria relies heavily on imported materials; however, inefficiencies and frequent delays at the seaports have led to increased costs, significantly affecting the sector’s contribution to the nation’s Gross Domestic Product (GDP). This study examines the relationship between the operational performance of Nigerian seaports and the GDP contribution of the construction sector. Secondary data on GDP and port performance indicators were obtained from the Central Bank of Nigeria (CBN) and the Nigerian Ports Authority (NPA), covering the period from 2011 to 2023. The analysis employed descriptive and inferential statistics methods, including regression and Stochastic Frontier Analysis (SFA). …

Acceptability Of The Proposed Congestion Charging System In The Central Business District Of Baguio City, Philippines, Ericka Renee A. Lanigt, Sandra S. Samantela, Ma. Catriona E. Devanadera, Casper Boongaling Agaton

CSID Journal of Infrastructure Development

The City Government of Baguio is proposing a congestion charging system in the Central Business District (CBD) to address the ongoing issue of traffic congestion in the city. Although it is an effective tool, low public acceptability hinders its implementation. This study aims to assess Baguio City residents' acceptability regarding the CBD's congestion charging system. Specifically, it seeks to (1) identify the factors that influence residents’ acceptability of the proposed system, (2) evaluate whether there is a significant difference in acceptability across different road users (private vehicles, public transportation, cycling, and walking), and (3) provide recommendations for transportation policy planning …

A Model Of Trips Route Planning To Improve The Accessibility Of Public Transportation In Bengkalis City Using Geographic Information System (Gis), Nur'ain Jaafar, Hendra Saputra, Mutia Lisya

CSID Journal of Infrastructure Development

The increase in population and motorized vehicles in Bengkalis City has led to greater demand for public transportation, which remains insufficient in meeting accessibility needs. This study aims to develop a model for planning public transportation routes using Geographic Information System (GIS) tools to improve accessibility in Bengkalis City. The study employs primary data from field surveys and secondary data from relevant agencies. GIS-based spatial analysis methods, such as service area analysis and the Origin-Destination (OD) matrix, are applied to evaluate accessibility and passenger movement patterns. The analysis results in two route alternatives assessed based on stop point density, community …

Efficient Methods And Algorithms For Analyzing Stochastic Systems, Mohammad Ahmadi

USF Tampa Graduate Theses and Dissertations

This dissertation addresses the challenges of stochastic analysis of safety-critical systems with biological components, where unexpected behavior can lead to catastrophic events. Two fundamental challenges hinder the analysis of such systems: their typically large or infinite state spaces, and the extreme rarity of error states of interest. While Monte Carlo simulation can analyze biochemical systems without storing the state space, accurately estimating rare event probabilities becomes computationally prohibitive. Conversely, probabilistic model checking excels at analyzing extremely low probability events but becomes impractical for systems with large or infinite state spaces due to memory constraints.This work proposes two main contributions to …

Grid Fragility, Blackouts, And Control Co-Design Solutions, Mario Garcia-Sanz

Faculty Scholarship

The grid is undergoing a large-scale transformation, including a significant reduction of synchronous generators, a high penetration of inverter-based resources and renewables, substantial demand growth, new extra-large loads, aging infrastructure and a concerning vulnerability to contingencies. Some of the recent massive blackouts in Spain/Portugal, Chile and Texas are exposing the fragility of the grid as we know it today. This paper introduces new solutions to stabilize the grid under undesired dynamic interactions and extreme contingencies, with the goal of avoiding cascading failures and blackouts. Using control co-design methodologies, the paper proposes three interdependent categories to improve the reliability and controllability …

3d Nano-Architected Polymer Shell Enables Reconfigurable Stabilized Blue Phase Soft Crystals, Sephideh Norouzi, Yazael R. Morales-Flores, Tadej Emersic, Jeremy Money, Otillo E. Rodriguez-Lopez, Andrew Casale, Juan J. De Pablo, Jose A. Martinez-Gonzalez, Monirosadat Sadati

Faculty Publications

Blue phases (BPs), formed through the self-assembly of chiral liquid crystal molecules into 3D nanolattices with cubic symmetries, exhibit dynamic photonic bandgaps in the visible spectrum, offering transformative opportunities for advanced optical circuits, sensing and communication technologies. However, their thermal stability is restricted to a narrow temperature range (0.5–1.0 K), limiting practical applications. Polymer stabilization of bulk BPs has extended thermal stability but often compromises the dynamic behavior essential for fast-response functionalities. Here, experimental and computational approaches are integrated to investigate the effect of curvature and interfacial interactions on BP polymer stabilization. It is demonstrated that photo-polymerization of reactive monomers …