Digital Commons Network^™

Synthesis Of N-Heterocyclic Carbene Complexes Of Coinage Metals And Their Application In The Activation Of Hydrogen, Maryam Akramova

Honors Projects

The main cause of the ongoing global climate crisis is the emission of greenhouse gases, and current climate reports emphasize the need to transition to low-emission renewable energy sources. Urgently needed are methods for storing renewable energy, such as synthetic fuels like hydrogen (H₂) gas; however, a challenge to the widespread implementation of hydrogen fuel is its low volumetric energy density. This thesis describes an effort to synthesize a catalyst that takes advantage of hard-soft acid-base (HSAB) mismatches to activate H₂ and facilitate its reaction with CO₂ to form hydrocarbon fuels, thereby providing a sustainable means …

The Combinatorial Effects Of Temperature And Salinity On The Nervous System Of The American Lobster, Homarus Americanus, Katrina Carrier

Honors Projects

The ability of nervous systems to maintain function when exposed to global perturbations in temperature and salinity is a non-trivial task. The nervous system of the American lobster (H. americanus), a marine osmoconformer and poikilotherm, must be robust to these stressors, as they frequently experience fluctuations in both. I characterized the effects of temperature on the output of the pyloric circuit, a central pattern generator in the stomatogastric nervous system (STNS) that controls food filtration and established the maximum temperature that neurons in this circuit can withstand without “crashing” (ceasing to function but recovering when returned to normal …

The Body Negotiating Unprecedented Movement, Mei Bock

Honors Projects

A collection of poems exploring threads including the Lower East Side, immigration, stray animals, art, and Chinese-American identity.

Modulation Of The Stretch Feedback Pathway In The Cardiac Neuromuscular System Of The American Lobster, Homarus Americanus, Karin Van Hassel

Honors Projects

The cardiac ganglion (CG) is a central pattern generator, a neural network that, when activated, produces patterned motor outputs such as breathing and walking. The CG induces the heart contractions of the American lobster, Homarus americanus, making the lobster heart neurogenic. In the American lobster, the CG is made up of nine neurons: four premotor pacemaker neurons that send signals to five motor neurons, causing bursts of action potentials from the motor neurons. These bursts cause cardiac muscle contractions that vary in strength based on the burst duration, frequency, and pattern.

The activity of the CG is modulated by feedback …

Basins Of Attraction And Metaoptimization For Particle Swarm Optimization Methods, David Ma

Honors Projects

Particle swarm optimization (PSO) is a metaheuristic optimization method that finds near- optima by spawning particles which explore within a given search space while exploiting the best candidate solutions of the swarm. PSO algorithms emulate the behavior of, say, a flock of birds or a school of fish, and encapsulate the randomness that is present in natural processes. In this paper, we discuss different initialization schemes and meta-optimizations for PSO, its performances on various multi-minima functions, and the unique intricacies and obstacles that the method faces when attempting to produce images for basins of attraction, which are the sets of …

Three-Year-Old Agents Of Social Change: How Aeiotu Educators Build On Children’S Agency, Andrea Rodriguez

Honors Projects

aeioTU is a Colombian organization that works to enact social change through the field of early childhood education. In collaboration with the Colombian government, aeioTU oversees several public centers located in socioeconomically vulnerable municipalities in Colombia. This thesis analyzes the aeioTU curriculum and the practices of several aeioTU teachers through the theoretical lens of Freire’s critical pedagogy. This thesis argues that by fostering critical awareness of the world from an early age, as well as by collaborating closely with mothers and the communities at large, aeioTU teachers equip children with the tools to become social agents who can challenge and …

Neural Compensation In Response To Salinity Perturbation In The Cardiac Ganglion Of The American Lobster, Homarus Americanus, Josephine P. Tidmore

Honors Projects

Central pattern generator (CPG) networks produce the rhythmic motor patterns that underlie critical behaviors such as breathing, walking, and heartbeat. The fidelity of these neural circuits in response to fluctuations in environmental conditions is essential for organismal survival. The specific ion channel profile of a neuron dictates its electrophysiological phenotype and is under homeostatic control, as channel proteins are constantly turning over in the membrane in response to internal and external stimuli. Neuronal function depends on ion channels and biophysical processes that are sensitive to external variables such as temperature, pH, and salinity. Nonetheless, the nervous system of the American …

Modeling The Development & Expression Of Political Opinion: A Zallerian Approach, Avery C. Ellis

Honors Projects

Research focused on John Zaller's famous RAS model of political opinion formation and change from "The Nature and Origins of Mass Opinion" (1992). Analyzed the mathematical and psychological underpinnings of the model, the first paper to do so in over fifteen years and the first to do so through an analysis of motivated reasoning and Bayesian reasoning. Synthesized existing critiques of Zaller's model and other literature to suggest ways to build on Zaller, utilizing fundamental reunderstandings of opinions and messages from political and mathematical perspectives. Found verification for Zaller's model, confirming its value, but also found support for the proposed …

Investigating The Impacts Of Drought On Turfgrass (Festuca Arundinacea) Chlorophyll-A Fluorescence Emission, Ayanna S. Hatton

Honors Projects

When photons from sunlight are absorbed by plants, they can take paths of photosynthesis, fluorescence, or energy dissipation. Instruments to quantify fluorescence have expanded in scale to allow measurements from satellites and flux towers using Solar-Induced Chlorophyll Fluorescence (SIF). Studies have found a positive correlation between SIF and gross primary productivity (GPP; representative of photosynthesis), suggesting SIF is a proxy for GPP. This conclusion encourages the use of SIF to inform decisions about carbon budgets and responding to climate change. Studies of fluorescence on the single-leaf scale have revealed that SIF measurements do not account for all variables nor is …

Deciphering Policymaking—The Enigma Of The 2003 Iraq War, Chengkai Gu

Honors Projects

This thesis examines the forces shaping the United States’ decision to initiate the 2003 Iraq War. It argues that while the Bush administration had vested interests in disarming Iraq to eliminate Saddam Hussein’s military threat and to secure stable global oil supplies, the decision-making process leading to the Iraq War was heavily influenced by domestic politics, such as bureaucratic bargaining, CIA intelligence collections, and interest group competition. In addition, individual-level factors, such as top officials’ personal beliefs and psychologies, also shaped the decision to intervene in Iraq. By explaining how strategic, domestic, and personal factors interacted to shape the decision …

A Histological Investigation Of Arceuthobium Pusillum Infections In Picea Rubens And Picea Glauca, Sade K. Mcclean

Honors Projects

Arceuthobium pusillum is a hemiparasite that infects select Picea species. The hosts of A. pusillum do not experience the same symptoms of infection. A. pusillum infections are more fatal to P. marinara, and P. glauca. P. rubens, on the other hand, can survive longer with sustained infection. This presents itself as a contemporary issue because P. glauca, one of the parasite’s most vulnerable hosts, was untethered from ecological competition when old growth forests were subjected to large scale anthropogenic disturbances. These disturbances allowed P. glauca to proliferate, with A. pusillum following. A deeper understanding of the host-species specific …

He Mauka Teitei, Ko Aoraki, The Loftiest Of Mountains: The Names Of Aotearoa’S Highest Peak And Beyond, Joseph B. Lancia

Honors Projects

My thesis discusses the cultural, political, and social dynamics of mountains with separate Indigenous and Western names and identities. Centering on Aoraki/Mount Cook—the highest peak in Aotearoa New Zealand—I integrate personal experiences as ethnographic data through narratives, mainly of my time hiking while studying abroad in New Zealand and during the two recent summers I spent exploring Rocky Mountain National Park in Colorado. Through its name, Aoraki/Mt. Cook maintains Indigenous Māori and Western perspectives: Aoraki being a Māori atua (god) and Captain James Cook being a significant colonial figure in the Pacific. The slash upholds both identities while ensuring that …

East End Eden: The Gentrification Of Portland’S Munjoy Hill, Katharine Kurtz

Honors Projects

This thesis explores the gentrification of Munjoy Hill, a neighborhood on the northeast end of Portland, Maine from 1990-2024. Once the industrial hub of the city filled with factories and an industrial shipping port in the late 1800s and early 1900s, Munjoy Hill is now the most desirable neighborhood in the city with expensive, high-end condos, water views, ocean access, and hip restaurants and breweries. I argue that Munjoy Hill’s industrial past and strong connection to the local environment has made it unique, however the recent gentrification also makes Munjoy Hill a place that resembles, gentrified neighborhoods in cities around …

Eroding The Bedrock: The Future Of Public Administration Without Chevron Deference, Rose Keller

Honors Projects

When Congress passes a bill, it produces words on a page. Who decides what those words mean? Historically, the onus of a statute’s interpretation has rested with the federal agencies charged with its implementation. The Chevron doctrine, a two-step standard that affords federal agencies significant latitude in interpreting their own enabling legislation, has been the applicable deference regime in statutory interpretation cases since 1984. Contrary to this tradition, recent Supreme Court jurisprudence has reasserted the primacy of the judiciary in statutory interpretation cases, often ignoring Chevron entirely. In 2023, the Court granted certiorari to Loper Bright Enterprises v. Raimondo, a …

Statistically Principled Deep Learning For Sar Image Segmentation, Cassandra Goldberg

Honors Projects

This project explores novel approaches for Synthetic Aperture Radar (SAR) image segmentation that integrate established statistical properties of SAR into deep learning models. First, Perlin Noise and Generalized Gamma distribution sampling methods were utilized to generate a synthetic dataset that effectively captures the statistical attributes of SAR data. Subsequently, deep learning segmentation architectures were developed that utilize average pooling and 1x1 convolutions to perform statistical moment computations. Finally, supervised and unsupervised disparity-based losses were incorporated into model training. The experimental outcomes yielded promising results: the synthetic dataset effectively trained deep learning models for real SAR data segmentation, the statistically-informed architectures …

Modulation Of The Crustacean Cardiac Neuromuscular System By The Sly Neuropeptide Family, Grant Griesman

Honors Projects

Central pattern generators (CPGs) are neuronal networks that produce rhythmic motor output in the absence of sensory stimuli. Invertebrate CPGs are valuable models of neural circuit dynamics and neuromodulation because they continue to generate fictive activity in vitro. For example, the cardiac ganglion (CG) of the Jonah crab (Cancer borealis) and American lobster (Homarus americanus) contains nine electrochemically coupled neurons that fire bursts of action potentials to trigger a heartbeat. The CG is modulated by neuropeptides, amines, small molecule transmitters, gases, and mechanosensory feedback pathways that enable flexibility and constrain output. One such modulator, the …

Mitochondrial Adaptation In The Green Crab Hybrid Zone Of The Gulf Of Maine, Jared Lynch

Honors Projects

The mitochondrial genome has historically been relegated to a neutral genetic marker, but new evidence suggests mitochondrial DNA to be a target for adaptation to environmental stress. The invasive European green crab (Carcinus maenas) exemplifies this in the Gulf of Maine’s hybrid zone, where interbreeding populations exhibit thermal tolerances influenced by mitochondrial genotype. To better understand the mechanism behind this phenomenon, the effect of mitochondrial genotype on mitochondrial activity was tested by measuring mtDNA copy number (mtCN) and the activity of complex I, II, and IV of the electron transport system via high-resolution respirometry. Mitochondria isolated from frozen …

Racial Bias Within Capital Punishment: Instructional Comprehension, Marcus Gadsden

Honors Projects

This dissertation examines the existence of racial bias within capital punishment. Since colonial times discriminatory death sentencing has impacted racial minorities, and despite living in a post-colonial epoch, the United States Justice system continues to produce alarming racial disparities. Consequently, both law reviews and social science journals indicate that race remains a significant factor in criminal trials. So, to what extent does racial bias influence capital punishment trials? Given that it does exist, how can it be alleviated? Through a statistical/qualitative analysis of psychological studies, Supreme Court cases, and jury instructions, this dissertation suggests that implicit cognitive bias continues to …

The French Official Mistress: Fashioning Female Political Power In The Ancien Régime, Samantha Brown

Honors Projects

This thesis focuses on the French official mistress as a position of unofficial female political power under the French monarchy from the 16^th to the 18^th century. Centering on three case studies – Diane de Poitiers, Madame de Maintenon, and Madame de Pompadour – this thesis argues that the role of the official mistress extended beyond sexual companion to advisor, negotiator, diplomat, artistic patron, and cultural trendsetter. By taking a deep look at the epistolary and artistic record of these three official mistresses from across France’s modern history, the extent of their autonomy and political maneuvering becomes clear …

Policy Making, Decision Making, And Advocacy: The U.S. Asylum System Since 9/11, Clara Jergins

Honors Projects

Immigration justice advocates and immigration restrictionists alike are unhappy with the way that the U.S. asylum system functions. This project seeks to develop a better understanding of policy changes and the politicized influence of the president and executive authorities over the asylum system since 9/11—in particular, these individuals’ ability to implement their policy preferences through the hiring and instruction of Asylum Officers and Immigration Judges. Through case studies of nonprofit organizations, it identifies the key points in the asylum process where asylum has been restricted, and the ways in which these restrictions can be responded to. On the basis of …

To Hum Or Not To Hum: Analyzing And Provoking Sound Production In The American Lobster (Homarus Americanus), Renske Kerkhofs

Honors Projects

American lobsters (Homarus americanus) produce humming sounds by vibrating their carapace. These sounds have a fundamental frequency on the order of 100 Hz, with multiple higher harmonics. Though I found no relationship between lobster carapace length and hum frequency, I observed sounds similarly structured to hums but with frequencies an order of magnitude higher, suggesting that lobsters may use a wider range of sounds than previously thought. Using laser vibrometry, I was able to pick up high frequencies of carapace vibration that were similar to those I observed on sound recordings. Lobsters seem to hum most readily when …

Physiological Responses Of The American Lobster Cardiovascular System To Neuropeptide Sgrnflrfamide (Sgrn), Andre Eden

Honors Projects

During every second of a human’s life, the cardiovascular system is modulated by factors both intrinsic and extrinsic to the physiology of the heart. We can uncover new insights regarding the nature of our system through investigations of similar systems in other model species. One example materializes itself in the form of the American Lobster (Homarus americanus) whose single-chambered heart finds resemblance to the function and anatomy to that of humans. The lobster heart is powered by the cardiac ganglion (CG), a group of neurons that drive contractions of surrounding heart muscles, known as the myocardium. Both the …

Activation Of Hydrogen By Sterically Modulated Coinage Metal Catalysts Via Mutual Quenching Of Hard/Soft Acid/Base Mismatches, Zach Leibowitz

Honors Projects

To mitigate the devastating environmental impacts of climate change in the coming decades, it is imperative that we replace the use of fossil fuels with renewable energy sources such as wind, solar, and hydroelectric. As these renewable energy sources are inherently intermittent, there exists a need for sustainable mechanisms to store renewable energy for later use. While the direct use of dihydrogen (H₂) as a combustible fuel would allow for energy storage without the harmful release of carbon dioxide (CO₂) upon combustion, the practicality of H₂ as a synthetic fuel is limited by its low …

Identity Formation In The Lebanese-American Christian Diaspora, Matthew Cesar Audi

Honors Projects

Since the late 1800s, people have immigrated to the United states from Lebanon and Syria, and the community’s racial and ethnic position within the United States has been contested ever since. Previous research emphasizes that while people from the Middle East and North Africa (MENA) are legally classified as “white” on the U.S. Census. However, many people from the region do not identify as white, and they often face discrimination or threats of violence. For people of Arab and Christian backgrounds this is further complicated because they are a part of the majority through their religion, but part of a …

Reframing Mourning: Liberatory Grief In Post-Tragedy Chinese American Women’S Fiction, Sophia Li

Honors Projects

My project approaches discussions of Asian American melancholia and mourning with a specific focus on contemporary Chinese American women’s fiction. Scholars such as David Eng, Shinhee Han, and Anne Anlin Cheng have long spotlighted the prevalence of depression among Asian American populations, particularly those with immigrant backgrounds, and they variously adopt psychoanalytic approaches to understand Asian American mental health and intersectional identities. Looking beyond psychoanalytic models, my project focuses on the works of Yiyun Li, Jenny Zhang, and K-Ming Chang to explore diverse forms of post-tragedy positionality. I read the authors paratextually, not only to locate them within legacies of …

An Agn As A Counterpart For Neutrino Event Icecube-220303a, Nur Schettino

Honors Projects

Cosmic rays have been detected for over a century. While some sources have been confirmed, they cannot explain the high energy of the particles (> 10^15 eV), so it remains unclear where and how they are accelerated to extreme energies. The study of astrophysical high-energy neutrinos may help solve the puzzle. These neutrinos are produced by cosmic rays interacting with other charged particles or photons. Moreover, while cosmic rays do not reveal their sources of origin because they can be deflected by magnetic fields, cosmic neutrinos detected by the IceCube Observatory can be traced back to their sources of origin. …

The Ethiopian Student Movement And The Dilemma Of Eritrean Sovereignty, Liat G. Tesfazgi

Honors Projects

From the perspective of Ethiopian royalists, Pan-Africanists, Marxist internationalists, supports of union, and the broader international community, Eritrean nationalism revealed distressing fissures in many different arguments for preserving Ethiopian territorial unity– arguments not necessarily or explicitly problematic, but nevertheless in opposition to Eritrean demands for the right to national self-determination. For the Ethiopian Student Movement (ESM) specifically, Eritrean sovereignty demanded a reconfiguration of Pan-African unity that conflicted with Ethiopian exceptionalist historiography. Through an analysis of student politics at Haile Selassie University, from 1960-1974, this thesis seeks to complicate existing historiography on the ESM by examining the periodically divergent experiences of …

Fall Forward, Spring Back: Drivers Of Synchrony In The Sea Star Crawl-Bounce Gait Transition, Brady R. Nichols

Honors Projects

The Froude number is the ratio of kinetic energy to gravitational potential energy used during locomotion and is often used to analyze gait transitions. Here, I compare and contrast the human walk-run gait transition, which occurs at a consistent Froude number of 1 because there exists a mechanical speed limit to walking, and the sea star crawl-bounce gait transition, which occurs around Froude numbers of 1*10^-3. In this thesis I investigate why sea stars exhibit two gaits despite lacking brains and moving at Froude numbers far below other known gait transitions, hypothesizing (1) that the crawl-bounce transition may be mechanical …

Power Play: The President's Role In Shaping Renewable Energy Regulation And Policy, Luke Bartol

Honors Projects

With the impacts of climate change becoming more and more apparent every day, finding means of effective action to mitigate its effects become increasingly critical. While localized work can play an important role, federal action is necessary to have the most widespread and effective impact, especially on interconnected issues such as clean energy. Congressional action is the avenue of change at this level, however in an increasingly partisan and divided environment, progress on this front is far short of what is needed.

Looking to the president is logical here, both as a single actor more insulated from partisan fights, but …

Peripheral Modulation Of Cardiac Contractions In The American Lobster, Homarus Americanus, By The Peptide Myosuppressin Is Mediated By Effects On The Cardiac Muscle Itself, Isabel Stella Petropoulos

Honors Projects

A substantial factor for behavioral flexibility is modulation — largely via neuropeptides — which occurs at multiple sites including neurons, muscles, and the neuromuscular junction (NMJ). Complex modulation distributed across multiple sites provides an interesting question: does modulation at multiple locations lead to greater dynamics than one receptor site alone? The cardiac neuromuscular system of the American lobster (Homarus americanus), driven by a central pattern generator called the cardiac ganglion (CG), is a model system for peptide modulation. The peptide myosuppressin (pQDLDHVFLRFamide) has been shown in the whole heart to decrease contraction frequency, largely due to its effects on …