Digital Commons Network^™

Plastic Repurposed: Explorations For The Use Of Plastic Waste As An Architectural Element, Caleb Tinajero

Bachelor of Architecture Theses - 5th Year

The business model for plastic has become accustomed to a system of consumption and disposal that has failed to develop a way that benefits the environment. Unless the production of plastic ceases to persist, the number of plastic waste will continue to grow and even though it is not fully visible, the effects of this pollution will eventually contaminate the aspects of our lives. Although stopping the production of such a vital factor to the prosperity of the economy is unrealistic, it could also be detrimental to the machinations of society. It is after all a very useful resource. The …

Urban Eden, Establishing The Groundwork For A More Resilient City, Max R. Oliva

Bachelor of Architecture Theses - 5th Year

Cities account for over 70% of Global C02 emissions and as these areas grow over time their Carbon Footprint will grow in turn. In order to offset this imbalance I propose to design Performative Skins & Building Modules to not only reduce the carbon footprint in these cities, but also recover their connection to Nature contributing not only to energy efficiency and air quality, but also to urban aesthetics, the inclusion of these systems could go so far as to help mitigate the heat island effect and in the long term help establish a more resilient and sustainable city

Characterization Of A Magnetically Contained Hot Filament Plasma Source With A Wide-Sweeping Langmuir Probe, Jonas Rowan

Doctoral Dissertations and Master's Theses

Ionospheric plasma research in the Space and Atmospheric Instrumentation Laboratory’s Space Plasma Chamber has been hindered by the lack of a suitable plasma diagnostic instrument and understanding of its hot-filament plasma source. This thesis describes efforts made to remedy both problems. A wide-range Sweeping Langmuir Probe was developed with a ±35 V sweeping range to fully analyze ion and electron saturation regions in the entire IV curve. A method was derived to estimate the chamber source’s filament temperatures. The new Langmuir probe was integrated into a refurbished automated system designed in Python to measure plasma parameters for various chamber conditions, …

Solar Sailing Adaptive Control Around The Earth-Moon Lagrange Point L4 For Stellar Observations, Luis Mendoza Zambrano

Doctoral Dissertations and Master's Theses

To expand our knowledge about the influence of the Sun in the cislunar region, as well as our understanding of shocks due to Coronal Mass Ejections and large coronal magnetic reconnection, a solar sailing approach is proposed to separately capture lunar occultations and observe the solar corona from L₄ of the Earth-Moon system. Single and multiple shooting techniques are described along with a pseudo arc-length continuation method for preliminary orbit design. Periodic orbits in the vicinity of L₄ are obtained in the context of the Earth-Moon circular restricted three-body problem (CR3BP) and the Sun-Earth-Moon bi-circular restricted four-body problem …

Satellite Reorientation Using Reinforcement Learning Under Unknown Attitude Failure, Matthew Willoughby

Doctoral Dissertations and Master's Theses

This study presents a reinforcement learning (RL) approach for reestablishing communication with deep-space satellites under unknown attitude determination and control system (ADCS) failures. When traditional fault-tolerant control methods cannot restore signal, the proposed RL controller acts as a last-resort measure by autonomously reorienting the satellite’s antenna toward Earth while charging the battery via solar panels. A generic reward function, designed for the RL-based method, enables the controller to adapt to diverse failure scenarios, including severe actuator noise, misalignment, and complete actuator failure. Simulations are conducted in the Basilisk environment and trained with the tonic framework and demonstrate ranging capabilities of …

Avery Powell ‘25 Named Regional Scholar Of American Chemical Society, Jeffery Woodard

Press Releases 2020-2029

No abstract provided.

The Diamond, May 6, 2025, Dordt University

Dordt Diamond

• Front Page: Dordt Buys Northwest Iowa Symphony Orchestra; Cheer Team Cinches Championship Title at Nationals; Deportation Initiatives Challenge Defenders
• News: The Question of Capping Enrollment; Tariff War Pivots to China
• Feature: Senior Farewells; Letter to the Editor; Letter from the Editor; Hands-On at Ag Day; Prayer for the Nations Introduced to Dordt; Bringing Beauty and Biblical Truth From Art Into Ministry - A Farewell to Professor Ryan Eckert; Senior Spotlight; Social Work Class Hosts "Colors of Courage" Color Run
• Arts & Entertainment: A Campus Tour of Senior Art Exhibits; Raising Awareness: The Ice Bucket Challenge
• Opinion …

First-Order And Second-Order Adjoint Method And Stochastic Approximation For Inverse Problems, Adrian Heldt

Theses

We present a unified framework for estimating stochastic parameters in general variational problems. This nonlinear inverse problem is formulated as a stochastic optimization problem using the output least-squares (OLS) objective, which minimizes the discrepancy between observed data and the computed solution. A key challenge in OLS-based formulations is the efficient computation of first- and second-order derivatives of the OLS functional, which depend on the corresponding derivatives of the parameter-to-solution map—often costly and difficult to evaluate, especially in stochastic settings. To address this, we develop a rigorous computational approach based on first- and second-order adjoint methods for inverse problems governed by …

Enhancing Aptv Reliability: A Study Of Design And Operational Efficiencies At An Aluminium Manufacturing Company, Mohammad Tayeb Alawadhi

Theses

This paper aims to focus on enhancing the reliability of Anode Pallet Transport Vehicles (APTVs) used in Aluminium Manufacturing Company. The primary objective of the project is to establish the causes of failure modes, assess the operational problems, and implement strategies that would prevent, reduce, or minimize the frequency of failure, low equipment utilization, and high maintenance costs. APTV performance analysis involves the use of maintenance logs, operational data, and engineering specifications to obtain the best results. Applying Failure Mode and Effects Analysis (FMEA), the study highlights the most critical parts causing the largest effect on operations, which include traction …

Northern Humboldt Indians: History Of Humboldt County People And Places, Jerry Rohde

Trade & Scholarly Monographs

In what is now Humboldt County and southern Klamath County, seven Indian tribes made their home: the Mawenok, Whilkut, Tsnungwe, Hupa, Karuk, Yurok, and Wiyot. They arrayed themselves upon the land and sent their roots down into the earth, so that they had become as one with the place. Their villages were of long standing, and even their individual houses could sometimes be traced back, by name, for hundreds of years. In 1850, whites arrived on the shores to rage like a gale across the land. For 15 years the gale would sweep up the rivers and over the ridges …

Developing A Protective Pcm Layer For An Aluminum Sheet, Rachel Foulk

Mechanical Engineering and Materials Science Independent Study

As electric vehicles (EVs) become increasingly prevalent, improving the thermal safety of battery systems is essential. This study investigates the development of a high-temperature-resistant coating for aluminum sheets, aimed at mitigating thermal runaway events by incorporating carbonate-based phase change materials (PCMs). Using a PTFE binder and calcium carbonate as the primary PCM, the coating was applied via airbrush to maintain a thin, even layer. Initial results showed the coating was thermally resilient but suffered from poor adhesion and mechanical strength, as demonstrated by failed hardness tests and inconsistent thermoconductivity data. Surface etching with sulfuric acid improved visual adhesion, suggesting potential …

Soft Modular Robots: From Modular Tensegrity Structures To Bioinspired Sea Robots, Luyang Zhao

Dartmouth College Ph.D Dissertations

The rapid advancement of robotics necessitates systems capable of adapting to complex, unstructured environments. Soft robots, with their flexibility and compliance, excel in delicate interactions, making them ideal for medical applications and search-and-rescue missions. Modular robots, on the other hand, offer reconfigurability, enabling diverse task-specific adaptations in dynamic settings. Despite their individual advantages, the integration of soft and modular robotics remains underexplored. This proposal aims to develop soft modular robots that combine the adaptability of soft robotics with the versatility of modularity. These systems will be capable of autonomously transitioning between locomotion, manipulation, and infrastructure assembly across land, water, and …

Diliang Chen Wins 2025 Innovator Of The Year Award For Work In Wearable Technology, Allison Bell

UNH Today Archive

No abstract provided.

Encountering The Imaginary: Félix Régamey In Japan And The Legacy Of Japonisme, Nicolas Moiseyev

Art and Art History Honors Projects

This thesis critically examines Félix Régamey’s transformative role in the development of Japonisme, highlighting his pivotal contribution to bridging Western perceptions and authentic Japanese culture during the late nineteenth century. Through an exploration of his firsthand experiences in Japan, Régamey emerges as a multifaceted and paradoxical figure—an artist, educator, and author—whose pursuits reshaped the narrative of Japanese art and cultural exchange in France amid the fervor of Japonisme. His immersion in Japanese society enabled him to engage directly with its artistic traditions, which he skillfully translated for European audiences. This study reveals Régamey’s efforts to challenge the prevailing Orientalist stereotypes …

Emotional Labour In The Boundary Work Of Filipino Transnational Workers In Indian Cities, Jozon A. Lorenzana

Department of Communication Faculty Publications

This article examines the boundary work undertaken by Filipino transnational workers in globalizing Indian cities. While the ‘practice turn’ in boundary studies has shed light on boundary work's mundane and performative dimensions, the role of emotions in performing such work needs to be ascertained. To account for both the performative and emotional dimensions of boundary work, I present an ethnographic study on Filipino professionals in India that engages Hochschild's concept of emotional labour. Since the mid-2000s, local and multinational companies have hired Filipino professionals to set up businesses and manage operations. I examined their practices of boundary work through in-depth …

Early Childhood Teachers’ Perspectives On Challenges Using Developmentally Appropriate Practices In The Classroom, Tamesha Samone Parris

Walden Dissertations and Doctoral Studies

Early childhood teachers’ understanding of developmentally appropriate practice (DAP) is necessary to support children’s development and learning in early childhood settings. The problem was many early childhood teachers experience challenges using DAP to make informed decisions in the classroom to support birth to 3-year-old children’s development and learning. The purpose of this qualitative study was to explore early childhood teachers’ perspectives on challenges using DAP to make informed decisions to support birth to 3-year-old children’s development and learning in the classroom and what was needed to improve their use of DAP. The conceptual framework for this study was the National …

Improving The Reproducibility Of Deep Learning Software: An Initial Investigation Through A Case Study Analysis, Nikita Ravi, Abhinav Goel, James C. Davis, George K. Thiruvathukal

Computer Science: Faculty Publications and Other Works

The field of deep learning has witnessed significant breakthroughs, spanning various applications, and fundamentally transforming current software capabilities. However, alongside these advancements, there have been increasing concerns about reproducing the results of these deep learning methods. This is significant because reproducibility is the foundation of reliability and validity in software development, particularly in the rapidly evolving domain of deep learning. The difficulty of reproducibility may arise due to several reasons, including having differences from the original execution environment, incompatible software libraries, proprietary data and source code, lack of transparency, and the stochastic nature in some software. A study conducted by …

A Work[Play]Ce For All: Working Hard And Playing Hard Shouldn't Be This Hard, Mary E. Caldwell

Bachelor of Architecture Theses - 5th Year

62% of the United States Labor Force goes to an office every day. That means that nearly 6 out of every 10 Americans spend most of their days experiencing an ordinary office environment every week. Children, on the other hand, spend most of their days in school, where they are constantly given playful and enjoyable tasks to promote their learning. Why does this concept of promoting pleasant emotions in a person’s everyday life seem to disappear as we become older and our everyday life becomes more critical to well-being? Imagine if offices were designed to promote pleasant experiences.

This thesis …

Using Sustained Silent Reading In The Secondary English Language Arts Classroom To Increase Reading Engagement, Hannah S. Burwell

Dissertations

Reading scores have dropped precipitously over the past twenty years, and English Language Arts (ELA) teachers are looking for in-school academic interventions to mitigate this decline. This descriptive case study explored classroom experiences and student engagement with reading in a choice-based Sustained Silent Reading (SSR) program in a high school. The study examines student experiences through Expectancy-Value Theory (EVT). EVT suggests that a student’s engagement with reading will increase when they find the task valuable and believe success is achievable. The study explores how providing students with the independence to select their reading materials influences their experience in class and …

The Impact Of Flipped Classroom With Active Learning Model Of Instruction In Teaching Stoichiometry In Chemistry Among Black And Brown Students, Lawrence Femi Akintokun

Dissertations

Students pursuing professions in STEM sometimes encounter difficulties in General Chemistry, a semester-long foundational subject. A fundamental subject in this course is stoichiometry, which pertains to the mathematical connections between elements and compounds in chemical processes. This fundamental notion is essential for comprehending advanced chemistry subjects, although it may provide challenges for students because of its dependence on algorithms and prior knowledge. Research has predominantly concentrated on the conceptualization of stoichiometry through models endorsed by educators, rather than on student involvement. This project sought to investigate the interactions of Black and Brown students with essential stoichiometry ideas in General Chemistry …

Chinese Students, Jim Crow Schools: Navigating Education In A Black-And-White Society, Amanda Young

Senior Honors Papers / Undergraduate Theses

Previous research on the history of education in the Jim Crow South has largely focused on the effects of legal segregation on Black communities. However, there existed another group: the Chinese. In the seemingly bifurcated system, their intermediate status was particularly discernible in the school. After Lum v. Rice (1927) stipulated that Chinese people, as members of the “colored” race, should be excluded from white schools, Chinese families sought other forms of education, including private tutors and church-sponsored mission schools. Still, they remained steadfast in their commitment to accessing white public education. The Chinese reproduced, acquiesced to, and in some …

Anti-Csf-1r Therapy With Combined Immuno- Chemotherapy Coordinate An Adaptive Immune Response To Eliminate Macrophage Enriched Triple Negative Breast Cancers, Diego A Pedroza, Xueying Yuan, Fengshuo Liu, Hilda L Chan, Christina Zhang, William Bowie, Alex J Smith, Sebastian J Calderon, Nadia Lieu, Weiguo Wu, Paul Porter, Poonam Sarkar, Na Zhao, Constanze V Oehler, Ondrej Peller, M Waleed Gaber, Qian Zhu, Charles M Perou, Xiang H-F Zhang, Jeffrey M Rosen

Faculty, Staff and Students Publications

Patients diagnosed with metastatic triple negative breast cancer (mTNBC) have limited treatment options, are more prone to develop resistance and are associated with high mortality. A cold tumor immune microenvironment (TIME) characterized by low T cells and high tumor associated macrophages (TAMs) in mTNBC is associated with the failure of standard-of-care chemotherapy and immune checkpoint blockade (ICB) treatment. We demonstrate that the combination of immunomodulatory metronomic Cyclophosphamide (CTX) coupled with anti-CSF-1R antibody targeted therapy (SNDX-ms6352) and anti-PD-1 (ICB), was highly effective against aggressive metastatic syngeneic

Lifespan Reference Curves For Harmonizing Multi-Site Regional Brain White Matter Metrics From Diffusion Mri, Alyssa H Zhu, Talia M Nir, Shayan Javid, Julio E Villalón-Reina, Amanda L Rodrigue, Lachlan T Strike, Greig I De Zubicaray, Katie L Mcmahon, Margaret J Wright, Sarah E Medland, John Blangero, David C Glahn, Peter Kochunov, Douglas E Williamson, Asta K Håberg, Paul M Thompson, Neda Jahanshad

Faculty, Staff and Student Publications

Age-related white matter (WM) microstructure maturation and decline occur throughout the human lifespan, complementing the process of gray matter development and degeneration. Here, we create normative lifespan reference curves for global and regional WM microstructure by harmonizing diffusion MRI (dMRI)-derived data from ten public datasets (N = 40,898 subjects; age: 3-95 years; 47.6% male). We tested three harmonization methods on regional diffusion tensor imaging (DTI) based fractional anisotropy (FA), a metric of WM microstructure, extracted using the ENIGMA-DTI pipeline. ComBat-GAM harmonization provided multi-study trajectories most consistent with known WM maturation peaks. Lifespan FA reference curves were validated with test-retest data …

Development Of A Miniaturized Extracorporeal Membrane Oxygenation (Ecmo) Device On A Microfluidic Platform, Nayeem Imtiaz

Theses

This research investigates the design, performance, and optimization of blood-contacting microfluidic medical devices, with each aim contributing to a broader understanding of how engineering choices influence hemocompatibility and oxygen transfer. Collectively, the findings from Aims 1A–2B offer integrated strategies to develop safer, more effective microfluidic systems for ECMO and dialysis. Aim 1A assessed hemolysis across device geometries using computational and experimental methods. All designs showed low device-induced hemolysis (< 2 ppm), validating their hemocompatibility. However, Power-Law models frequently overpredicted hemolysis, indicating a need for refined parameters tailored to microfluidic flow conditions. Aim 1B demonstrated the effectiveness of thrombosis assay techniques in evaluating clot formation in microfluidic device geometries. Results showed that geometry and local shear patterns strongly influence thrombogenesis. While hemolysis remained minimal even in high-shear devices, thrombus formation was more geometry-sensitive—underscoring the need to account for both factors in design. Modifying surface properties and accounting for blood composition could further reduce thrombotic risk. In Aim 2A, we compared PDMS, polypropylene (PP), and nanoporous silicon nitride (NPSiN) membranes for oxygen transport. Findings showed that in ECMO devices, blood-side resistance, not membrane permeability, often dominates oxygen transfer. Thus, membrane choice must be paired with optimized blood-side flow for full performance gains. Aim 2B directly addressed these limitations by integrating staggered herringbone mixers (SHBs), which introduced secondary flows and enhanced mixing. The Single Channel Herringbone design yielded the highest oxygen transfer, confirming the synergy between flow geometry and oxygen transport performance. Altogether, Aims 1A and 1B establish a strong framework for hemocompatibility evaluation, while Aims 2A and 2B provide complementary insights into optimizing oxygen transfer. Their interconnections highlight the value of a systems-level approach to designing microfluidic blood-contacting devices.

Immigrants Reduce Unionization In The United States, Town Oh, Alex Nowrasteh

School of Business and Leadership Working Papers

Since the 1960s, U.S. union density has consistently dropped as the immigrant share of the population has risen. Using the Naylor and Cripps (1993) model of union formation, we argue that immigrants lower unionization by increasing diversity in the working population that, in turn, reduces solidarity and by having lower preferences for unionization. Empirically, we employ the skill-cell method devised by Borjas (2003) over the 1994-2020 period. Immigration can explain 30 percent of the decline in union density from 1994-2020.

Identification Of Glaucoma Subtypes Using Unsupervised Machine Learning Methods, Asma Poursoroush

Electronic Theses and Dissertations Archive

Healthcare is currently in a transitional stage between demonstrating the potential of clustering algorithms in personalized medicine and their widespread adoption. With recent advancements in unsupervised data analysis, clustering methods have become increasingly important in disease subtyping. However, the design, development, optimization, and implementation of automated subtyping systems require further maturity before they can be fully integrated into healthcare systems. This dissertation investigates the application of clustering algorithms in creating automated subtyping systems and highlights the current challenges and limitations that must be addressed to facilitate clinical translation into personalized healthcare. Moreover, K-mean and density-based clustering were used to identify …

Spatial Echoes, Joy Cherichel

Bachelor of Architecture Theses - 5th Year

This abstract critiques the limitations within the U.S. education system, arguing that its selective preservation of history often obscures crucial narratives, particularly regarding systemic racism. Focusing on the suppressed history of Oscarville and the expulsion of Black residents from Forsyth County, Georgia, in 1912, the proposal advocates for architectural intervention to combat this historical amnesia. The central research question explores how architecture can preserve and convey unbiased racial history to enhance education. The thesis posits that intentionally designed architecture can serve as a powerful and enduring educational tool, making it harder to ignore marginalized histories. To address this, the abstract …

Origami Lunar Habitation Unfolding A Future Colony In Space, Andrew Fields

Bachelor of Architecture Theses - 5th Year

What is origami? Origami is the ancient Japanese art of folding paper into decorative pieces. Today we use origami as a way to compact things for better storage or transportation and still to create decorative pieces of art. Origami is a must in space travel as it allows for large satellites to be folded and compacted down into a rocket and then unfolded in space to allow for the most surface area for solar absorption.

How can origami help? By making it possible to create lightweight, expandable structures that can be used in alien environments and by enabling the repair …

Blood Architecture : Designing A Hemophilia Treatment Center Through Biomimetic Principles, Melissa Da Costa Schmidt

Bachelor of Architecture Theses - 5th Year

This thesis explores how biomimetic principles drawn from the blood clotting process can inform the architectural design of hemophilia treatment centers, enhancing their efficiency, adaptability, and patient-centered care. By paralleling the phases of hemostasis—platelet aggregation, clotting factor activation, and fibrin stabilization—with spatial functions, the design proposes a layout where acute care areas are centrally positioned for rapid response, while rehabilitation zones support long-term healing, mirroring the reinforcement phase of clotting. Regulated movement and spatial zoning echo the precise control of clot formation, promoting accessibility, privacy, and reduced congestion. Architectural forms inspired by vascular networks, combined with the use of natural …

Viewing From The Sidelines: Tackling Temporality Impacting Displaced Refugees By Humanizing Border Design, Robinson Badell-Garcia

Bachelor of Architecture Theses - 5th Year

Every day, you follow a routine that brings comfort- be it work, errands, or family care. Now, imagine the unthinkable: your stable world collapses around you, leaving you homeless and adrift. Stripped of job and shelter, what’s the best option? To leave and seek answers in unfamiliar places while grappling with the profound isolation and discrimination that comes from being displaced.

As architects, our role is to communicate people's dreams and realities, striving for a sustainable future while fostering dialogue and care. This thesis focuses on the architectural response to the increasing displacement along the Türkiye-Syria border, exacerbated by ongoing …