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Factors Contributing To The Demographic Cliff: More U.S. Women Of Childbearing Age, But Fewer Have Given Birth, Kenneth M. Johnson

Carsey Publications

In this brief, author Kenneth Johnson reports that in 2024 there were 5.7 million more childless women of prime child-bearing age than would have been expected given fertility patterns prior to the Great Recession, up from 2.1 million in 2016 and 4.7 million in 2022. There are 4 million more women aged 20–39 than in 2006, but 7 million fewer have given birth. The shift in fertility patterns has resulted in 11.8 million fewer babies in the past 17 years.

Fertility rate declines were greatest among women under 30, where childless rates increased the most. Childless rates increased modestly among …

“Lead”Ing Industrial Science: Studying Occupational Lead Poisoning In The Early 20th Century, Rebekah E. Dreyer-Rowe

Master's Theses and Capstones

Lead was essential to the creation and coalescence of industrial hygiene as a discipline in the United States from its early days in the 1910s through the 1930s when the first professional associations of industrial hygiene were formed. In the early years, Alice Hamilton was central to the burgeoning field, and her seminal study on lead poisoning in Illinois industries thrust both her and her methods into the spotlight. Industrial hygienists of her generation followed her methods and came away with similar conclusions: that occupational diseases were rampant in the US, even if few people were studying them. In the …

Innocent Fun Or Unhealthy Habit: What's Your Game? Personality And Engagement With Video Games, Derrick Angier

Doctoral Dissertations

This thesis reports two exploratory studies of similar design, both of which investigated which gamers might be at risk for problematic or aggressive gaming. In both Study 1 (N = 480) and Study 2 (N = 761), which served as a replication, four composite scores representing participants’ personality attributes were created from big traits of the HEXACO—Honesty-Humility, Emotionality, Extraversion, Agreeableness, Conscientiousness, and Openness, a people-centered intelligence—personal intelligence—and motives for gaming. These composite scores and the subordinate individual variables were used to predict lifespace measures of unhealthy/healthy gaming behaviors and aggressive/pro-social in-game interactions. Lifespace scales capture a person’s reports of their …

Multiscale Modeling And Analysis Of Biomedically Relevant Uhmwpe-Based Composite Materials, Stanislav Buklovskyi

Doctoral Dissertations

The development of ultra-high-molecular-weight-polyethylene (UHMWPE) based composite materials continues to present significant opportunities in biomedical engineering, particularly in joint arthroplasty and implant technologies. As applications expand, the need for accurate modeling of microstructure–property relationships to guide informed material design and manufacturing decisions is increasing. This dissertation presents a multiscale numerical modeling framework informed by X-ray micro-computed tomography (μCT) data to corelate the effective mechanical, thermal, and electrical properties of biomedically relevant composite systems with their microstructure.

Two material systems are considered: UHMWPE reinforced with conductive carbon black (CB) nanoparticles, and porous UHMWPE with two processes of pores generation. For CB/UHMWPE …

Reentry, Justice Involvement, And Evolving Perspectives: Moving Toward Rehabilitation?, Casey Cavanaugh

Doctoral Dissertations

As prison populations climb, it is inevitable that the vast majority of incarcerated individuals will eventually return to the community. As they return, they face numerous barriers resulting from their incarceration. While it is important to identify barriers to reentry, it is also important to identify facilitators of reentry, which include forces that may mitigate reentry challenges. A tool is needed to measure this comprehensive list of barriers and facilitators, and in doing so, one may identify improvements and successes that stretch beyond merely that of recidivism. “Successful” reentry is typically measured through low recidivism rates, which recent government reports …

"She Wrote Too Much": Overproduction And The Canonicity Of Victorian Women Novelists, Elizabeth Drummey

Doctoral Dissertations

Though the Victorian era is often viewed as “the age of female novelists,” many of the most prolific and popular women writers of the time have been belittled, ignored, and forgotten. While the feminist literary recovery work of the 1980s and 1990s has brought many of these women back into scholarly consciousness, they have still not gained the respect given to their more famous yet less prolific contemporaries: the Brontë sisters, George Eliot, and Elizabeth Gaskell. In this dissertation, I argue that the reason can be found in a criticism frequently applied to these women writers both in their own …

Planning Responses To Drinking Water System Emergencies, Jingyan Huang

Doctoral Dissertations

Despite extensive efforts to ensure clean and safe drinking water, drinking water contamination emergencies remain a persistent challenge in the United States. These events can result in widespread public health impacts, economic losses, and long-term environmental damage, particularly when triggered by hazardous chemical releases. Effective management of such crises requires a dual focus on both technical preparedness and human decision-making. This dissertation addresses these challenges through a two-part investigation that bridges pre-incident planning and post-incident response. It is guided by two core research objectives: (1) to evaluate commonly applied emergency countermeasures from both resilience and sustainability perspectives; and (2) to …

Psychological Factors Of Acting Talent And Success: You've Got "It", Lorelei Tierney Himlin

Doctoral Dissertations

The goal of an actor is to become invisible, bringing a character to life so convincingly that the audience forgets the actor exists outside the role. Different schools of acting often describe differing methods of portraying characters to this same general effect. To followers of the Meisner school, for example, “acting is behaving truthfully under imaginary circumstances” (Meisner et al., 1987). The “truthful” part involves creating a comprehensive mental model of a character’s imagined personality in order to fully embody that personality and extrapolate it to a situation. Then the actor uses a variety of acting techniques to think and …

Missing Child Incidents Resulting In Death: Distinguishing Features Between False Allegations, Wander-Offs, And True Child Abductions, Madison N. Sundberg-Alley

Doctoral Dissertations

Children are reported missing in the United States for a multitude of reasons every year. Often, law enforcement is tasked with investigating these disappearances and recovering the missing child. In some instances, determining the reason why a child is missing can be challenging. This study focuses on three types of missing child episodes that result in fatality: child abduction homicides (CAH), false allegations of child disappearance (FACD), and wander-offs (WO). This exploratory analysis contributes to a gap in the literature by identifying some possible differences between case types that may assist police in determining the likely explanation for the disappearance. …

Analyzing Regions For The Study Of Localized Fluctuations In The Ground Magnetic Field For The Development Of A Global Risk-Assessment Forecast, Michael Kavanagh Coughlan

Doctoral Dissertations

The dynamic relationship between the solar wind and the Earth's magnetic field can produce rapid changes in the geomagnetic field measured on the ground ($dB_H/dt$). The fluctuations can be highly localized, with differences of up to 100s of nT/min in a small geographic area. The field of space weather is entering a more data-driven era, with enormous amounts of publicly available datasets from satellites and ground measurements. In this work modern machine learning techniques were employed to make forecasting risk-assessment predictions of large and localized $dB_H/dt$, and model explainability methods were employed to understand the non-linear connections being made. These …

Counting Kelp: Development And Assessment Of Modelling Approaches To Improve Understanding Of Kelp Bed Abundance And Resilience In The Gulf Of Maine, Constance N. Tyler

Doctoral Dissertations

Kelp habitats in the Gulf of Maine are threatened by rising ocean temperatures and marine invasions. The replacement of kelps with red turf macroalgae fundamentally alters these habitats and disrupts the ecosystem services they provide. Thorough assessment and monitoring of kelp habitats is needed for proper conservation of these habitats, but most long-term monitoring is performed using traditional survey methods that are restricted in the amount of space they can cover. Habitat modelling approaches are required to expand our knowledge of Gulf of Maine kelp habitats, and to better understand the interactions between kelp and red turf habitats across the …

The Assessment Of Language, The Language Of Assessment: Understanding How Language Teachers Support Dynamic, Communicative Language Learning Through Assessment, Rebecca Kelley

Doctoral Dissertations

As language classrooms in K-12 schools in the United States seek to promote students’ proficiency in the language they teach and to prepare students for a multilingual world, the role of assessment in these classrooms is often overlooked. This study draws from theories of formative and dynamic assessment, as well as a socially-constructed view of language and language learning, in order to examine the way in which secondary language teachers plan for, elicit, interpret, and use evidence from classroom assessments in such a way that promotes and supports the language learning happening in the classroom. Through a series of three …

Essays On International Trade, Aochen Xiao

Doctoral Dissertations

This dissertation has two chapters.In Chapter 1, I develop a model of international trade with innovation and trade surplus to examine the effects of China’s large trade surplus on productivity. I abstract from future benefits from holding a present trade surplus and focus on the present gains in productivity. I find that the average productivity increase caused by trade surplus ranges from 1.2 percentage points to 5.46 percentage points when the innovation cost changes. These results explain China’s long-term export promotion policies and align with its new policy goal of developing “new productivity forces”. I also identify a negative effect …

Technologies To Support Remote Work For Collaborative Groups, Alberta Ansah

Doctoral Dissertations

The nature of work continues to evolve, particularly in the aftermath of the COVID-19 pandemic. While a substantial number of employees have returned to traditional, in-person work environments, many continue to engage in remote or hybrid work arrangements. Online meetings are a significant aspect of remote work, and while there has been a significant increase in this area, there are still aspects of these meetings that are not fully understood. Existing research in this area has primarily focused on the development of tools to facilitate meeting execution and content management. In contrast, relatively few studies have explored the social dynamics …

Addressing Economic Valuation Issues Of Outdoor Recreation: Case Studies Of Lake Michigan Invasive Carp And Plum Island Visits, Iris Tryfoni

Doctoral Dissertations

Environmental valuation is the process of assigning monetary value on environmental goods and services, which do not easily have market prices. It is, however, possible to over- or underestimate the economic valuation of outdoor recreation issues, specifically (1) recreational fishing and (2) beach recreation. Despite their different focuses, both case studies share a common objective of refining methodologies to better understand and address complex environmental issues from an economic perspective. Traditional recreation valuation techniques often lack explicit connection to ecology, which can be impacted by various factors. Addressing this gap, in the first part of my dissertation, I propose a …

Phishing Hunter: Phishing Domain Detection System, Connor Tess

Master's Theses and Capstones

Phishing domains are a common and effective attack vector that malicious actors use to fool users into believing that they are going to a trusted website in the hopes of compromising users. These attacks can also be referred to as phishing attacks because the domain in which malicious attackers act has a hook to trick users into going to the domain that users believe is legitimate. These malicious actors mislead users into believing they are visiting the intended site, when in reality they have been led to a website hosted by the actors. The purpose of this paper is to …

Differentiated Learning In An Upper-Level Undergraduate Physics Theory Course, Christina Gurney

Master's Theses and Capstones

‘One-size-fits-all’ education aims to cater to the ‘average’ student, but the ‘average’ student does not exist. Students are individuals, each with a set of needs, abilities, preferences, and interests unique to them. A variety of instructional approaches should thus be used to differentiate students’ learning. This differentiation has been studied mostly for K-12. My study extends this research into an upper-level undergraduate physics theory course. For this phenomenographic pilot study, I interviewed ten students about the differentiated homework assignments in their upper-level undergraduate classical mechanics course at the University of New Hampshire. I performed an issue-focused analysis of the data, …

Atomic Agency: South Africa, Détente, And The Cold War’S Peripheral Proliferation, Travis Clyde Nason

Master's Theses and Capstones

In August 1977, a Soviet satellite obtained evidence that the South African government was preparing to detonate a nuclear device. Though the test never occurred, one thing was for certain: Pretoria sought the bomb. This thesis traces the path to that moment and argues that while détente, in Henry Kissinger’s vision, was meant to preserve global order by managing great-power rivalry and avoiding direct confrontation, it could not be all things at once – and South Africa slipped through the cracks. Both Washington and Moscow explicitly condemned the spread of nuclear weapons, yet the logic of détente – prioritizing stability …

Modeling Ungulate Population Parameters Across Human-Modified Landscapes, Sarah Richard

Master's Theses and Capstones

As human activity and development continue to alter natural landscapes, large ungulates are increasingly exposed to changing habitat structures, altered mortality risks, and climate-related stressors. These ecological shifts can influence their survival, behavior, and population dynamics. Understanding how such complex and evolving conditions shape demographic trends in these species is critical for effective management. In this thesis, I examined two ecologically and culturally important ungulate species, white-tailed deer (Odocoileus virginianus) and moose (Alces alces), across human-modified environments. Specifically, I analyzed how intrinsic factors, behavioral development, and landscape composition influence stage-specific mortality in deer neonates and population parameters in moose in …

Sensor-Driven Machine Learning Framework For Rock Climbing Skill Assessment Using Climbing Core Ability And Contact Force Metrics, Blaise Xavier O'Mara

Master's Theses and Capstones

Rock climbers lack tools for skill assessment. Climbers ascend routes, each with varying difficulty (grade); as such, climber skill level is typically described as the highest grade recently climbed. But the subjectivity of rock climbing route difficulty grading presents complications with standardized skill assessment. Measures of climbing core abilities (power, strength, endurance, speed, control, and stability) through non-specific sport exercises and contact forces metrics present more objectivity in climber skill assessment. Presented in this study is a custom force sensor network instrumented in a bouldering route for recording contact force metrics. Twenty-four climbers, split into IRCRA Intermediate and Advanced skill …

The Catholic Terror: A History Of The Baptism Of Enslaved Populations In The Colonial Protestant Atlantic, Benjamin Taylor

Master's Theses and Capstones

In the mid-eighteenth century, the number of enslaved people baptized into the Protestant church increased in the British Atlantic. Many historians have argued that the increase occurred by highlighting scriptural debates between slave owners and missionaries. Many slave owners believed that being Christian was synonymous with being free, but missionaries staunchly opposed this view. To change slave owners’ minds, missionaries argued that Protestantism made enslaved people “better behaved.” However, I believe that the reason slave owners became more willing to baptize enslaved people had more to do with external factors. The British were surrounded by many antagonistic Native tribes and …

Evaluating Unoccupied Aerial Systems (Uass) For The Monitoring Of Unmarked Moose In New Hampshire, Usa, Lily Hall

Master's Theses and Capstones

Accurate estimates of wildlife densities are important for understanding population dynamics and informing management decisions. Recent technological developments such as improvements of unoccupied aerial systems (UASs) and sensors provide novel pathways to estimate wildlife densities. However, these methods require critical evaluation of efficacy. In this research, we evaluated the capability of UASs to predict moose (Alces alces) density across a large landscape (~12,000 km2) in northern New Hampshire, USA using longwave infrared imagery via UAS sampling. In Chapter 1, our objective was to account for imperfect detection by creating a sightability model for unmarked moose that includes covariates expected to …

A Mixed-Methods Approach To Describe Typologies And Fiber Consumption Patterns Of Hispanic/Latino Adults Grouped Using Cluster Analysis, Nicholas Clarke

Master's Theses and Capstones

AbstractBackground: Hispanic/Latino adults in the United States experience disproportionate rates of obesity and diet-related chronic diseases yet remain underrepresented in obesity research. Traditional “one-size-fits-all” nutrition interventions have demonstrated limited effectiveness in this population, largely due to substantial heterogeneity in cultural, socioeconomic, and behavioral factors that influence dietary patterns. Objectives: The overarching goal of this project was to further characterize previously identified subgroups within the Hispanic/Latino population to provide a foundation for future tailored interventions that address the specific needs and preferences of these subpopulations. Specific aims were to: 1. Describe cluster typologies using a virtual nominal group technique (vNGT) with …

Wildlife Connectivity And Its Relationship With Vehicle Collision Hotspots Across New Hampshire, Clara Dawson

Master's Theses and Capstones

Chp. 1: Road networks fragment wildlife habitat and impede wildlife connectivity, which leads to elevated wildlife-vehicle collision (WVC) risk and increased danger to humans and wildlife. Habitat connectivity has been linked to WVC hotspot location and intensity, but this relationship likely depends on landscape context and road characteristics, which may be nonlinear due to varying habitat availability. Our objective was to evaluate factors affecting WVC location and intensity across New Hampshire, USA, with a focus on habitat connectivity. We assessed the relationship between WVCs and five connectivity models using generalized additive models and compared connectivity effects to road and land …

Toxin-Producing Cyanobacteria In Green Manure Microbiomes, Alyssa Nicole Daigle

Master's Theses and Capstones

The increasing reliance on inefficient synthetic fertilizers, which readily leach from soils and contribute to downstream pollution, underscores the urgent need for more sustainable nutrient sources, such as green manures (GMs). Floating aquatic plants like duckweeds are particularly promising candidates due to their natural abundance, rapid growth rates, and ability to efficiently uptake nutrients. However, the presence of toxin-producing cyanobacteria in duckweed microbiomes raises concerns about the potential for toxin accumulation, like microcystins (MCs), both in the GM biomass and in the edible crops to which it is applied. To evaluate the suitability and safety of duckweed-based GMs, we conducted …

Reducing Early-Age Concrete Cracking In Bridge Decks And Curbs Through Mix Design, Gabriel Geiersbach Guertin

Master's Theses and Capstones

Bridge curbs are an integral part of a bridge’s deck. However, an abnormal rate of early-age cracking has been noted by many state agencies, including New Hampshire Department of Transportation (NH DOT), on bridge decks and curbs across each state. A literature review was conducted to discover and develop actionable remediation techniques. Within this review, several different remediation techniques were found that could reduce early-age cracking. The subset of this field focusing on mix design remediations was chosen due to the broad applicability and replicability of the approach. When considering mix design, Internally Cured Concrete (ICC) was found to provide …

Increasing The Knowledge Base Of A Novel Fruit Crop, Actinidia Arguta, To Promote Adoption In The Northeastern United States, Zoe Rose Robinson

Master's Theses and Capstones

The unique attributes of kiwiberry (Actinidia arguta (Siebold et Zucc.) Planch ex. Miq) make it a promising high-value fruit crop for the Northeastern United States, although not widely grown in the region. As discussed in Chapter 1, it is likely that some of the barriers to kiwiberry diffusion in the Northeast include basic research gaps (e.g. crop physiology, management, and enterprise analysis), and a lack of farmer-to-farmer communication channels. To address some of these barriers, this thesis reports the results of a Northeast commercial kiwiberry growers survey to provide a portrait of current regional kiwiberry production, and experiments to determine …

Investigating The Offsets Between The Clumped Isotope Signatures Of Various Species Of Benthic Foraminifera, Ceara Hogan Yourell

Master's Theses and Capstones

For much of the last half century, the primary tool for reconstructing ancient ocean temperatures was the oxygen isotope paleothermometer. However, this method is fundamentally limited by its reliance on assumptions about the δ¹⁸O value of seawater, which introduces uncertainty into paleotemperature estimates. The clumped isotope paleothermometer (Δ47) offers a promising alternative by directly measuring the stochastic "clumping" of heavy isotopes (¹³C and ¹⁸O) within the carbonate lattice—a process governed solely by temperature and independent of seawater isotopic composition (Ghosh et al., 2006; Eiler, 2007). While Δ47 paleothermometry has been applied successfully in diverse contexts, including reconstructing extinct animal body …

Pre-Production Plastic Pellets (Pppp) Virtual Webinar, Coastal Response Research Center

Coastal Response Research Center

The Coastal Response Research Center (CRRC) organized and facilitated a virtual webinar on “Pre-Production Plastic Pellets (PPPP)”. The webinar was held in collaboration with NOAA’s Office of Response & Restoration (OR&R) and a steering committee comprised of representatives from federal agencies and other stakeholders. It was held on June 3 & 4, 2025. This was the second program CRRC and OR&R conducted on PPPP. The first was an in-person workshop in 2023.

Specific Objectives:

1. Improve and enhance collaboration among responders and researchers for PPPP incidents;
2. Evaluate recent (since 2023 workshop) PPPP case studies for challenges and lessons learned;
3. Explore operational …