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The Long And Short Of It: Exploring The Essential Dynamics Of Select Geophysical Flows, Adhithiya Sivakumar

Doctoral Dissertations

Geophysical flows are central to important climatological processes, yet their strong turbulence and additional complexities -- density stratification, wave-current interaction, and phase change -- make analytical prediction and direct numerical simulation infeasible in many regimes. This dissertation adopts a reductionist approach in which simplified representations -- often inspired by observed scale disparities -- are utilized to isolate and investigate the organizing mechanisms of these complex flows. Within this framework, three distinct but thematically connected problems are studied.

We first study Langmuir turbulence in the open ocean, in which surface gravity waves interact with wind-driven currents to organize the mixed layer …

From Surfaces To Scaffolds: Tuning Hydrogel Microenvironments To Control Cell-Material Interaction, Tran Truong

Doctoral Dissertations

The last 40 years of in vitro cell and tissue biology have relied heavily on tissue culture plastic (TCPS), which offers high transparency and a simple, user-friendly method for growing adherent cells. Unfortunately, TCPS has limitations, such as its rigidity, which may alter cell shape, disrupt cell signaling, and ultimately affect cell fate. The poor control over the adsorption of proteins to TCPS and the fact that surface chemistry is fixed on this material are only two examples of the limitations that motivate the development of hydrogel-based culturing platforms, during which the mechanical properties, charge, hydrophobicity, and ligand presentation can …

Emotional Complexity In Context: Within-Person Variability In Emotional Granularity, Emotion Covariation, And Emodiversity, Kristen Diann Petagna

Doctoral Dissertations

Key features of emotional complexity include emotional granularity, the ability to identify feelings with precision; emodiversity, the number and evenness of different emotions experienced; and emotion covariation, the tendency to experience positive and negative emotions independently. Prior work has largely treated these features as trait-like. This dissertation examines whether these features are dynamic by investigating how they vary within individuals over time and across contexts. In Chapter 2, participants (N =123) reported their emotions multiple times a day for 6 weeks and completed biweekly assessments of mental health symptoms. Emotional granularity and covariation increased over time, whereas emodiversity decreased, and …

Exploring The Effects Of Voluntary Wheel Running On Inhibitory Control, Ava Prieto

Honors Theses and Capstones

Inhibitory control, a central component of executive function, is the ability to suppress unwanted actions in response to a stimulus (Verbruggen et al., 2014; Verbruggen et al., 2019) and is one of the best indicators of executive task management as well as the ability to prevent unwanted prepotent responses. This capacity is essential for goal specific behavior and for responding flexibly to challenges. The present study examined the effects of voluntary wheel running on inhibitory control in two cohorts of Long-Evans rats using a rodent variant of the canonical stop-signal task. We found that rats with access to an active …

Evaluating The Use Of Precision Technology To Understand Differences Between Ketotic And Non-Ketotic Jersey Cows, Emily Kathryn Palermo

Honors Theses and Capstones

No abstract provided.

Tmem116 Crispr-Mediated Knockout Prevents Proper Lens Regeneration In Iberian-Ribbed Newts, Damien T. Mann

Honors Theses and Capstones

Eye diseases like cataracts, age-related macular degeneration (AMD), and glaucoma are widespread and detrimental conditions affecting many people across the globe. While there are reliable and successful treatments for those with cataracts that can reverse vision impediments, others like glaucoma and AMD have limited treatment options. Additionally, eye damage resulting from these conditions is commonly irreversible, establishing a need for new treatment options. The Iberian-ribbed newt, Pleurodeles waltl, is a salamander species primarily studied for their amazing regenerative capabilities. Particularly, these newts are capable of de novo lens regeneration after a complete resection, providing a unique opportunity to study regeneration …

A Period And Cohort Analysis Of Sustained Fertility Decline In The United States, Tyrus Parker

Doctoral Dissertations

Fertility rates in the United States have declined by 21 percent since the most recent peak in 2007. Despite more childbearing-aged women in the United States, this fertility rate decline has resulted in fewer births. Tracking these shifts is not a purely demographic exercise. Rather, a declining number of births has wide-ranging effects on society, including school closures, loss of labor and delivery centers, and eventually labor force implications as the number of workers shrinks. To examine the causes of modern fertility decline, this dissertation contains three interrelated analyses. I first examine population-wide fertility trends using data from the Center …

Perception Of Posed And Naturally Occurring Emotion Expressions In Close Friendships, Kaitlyn M. Mcmullen

Doctoral Dissertations

While relationships are critical to our daily emotional lives, the limited research on emotion perception among close friends presents inconsistent evidence concerning whether differences exist between close friends and strangers. The present work examined the ways in which familiarity between close friends’ shapes emotion perception. In Study 1a, expressors provided both naturally occurring and dynamic posed emotion expressions for seven emotion categories (anger, sadness, fear, disgust, happiness, surprise, and neutral) in order to develop a stimulus set where the stereotypicality of the expressions varies within-subjects. In Study 1b, a self-identified close friend of each expressor viewed and rated the expressions …

Syrup Production And Tree Physiology, David Blakney Moore

Doctoral Dissertations

Maple (Acer spp.) syrup production is a culturally and economically important activity in North America, and other types of trees are economically important (or show potential to become more economically important) for their syrup as well. For both established and novel syrup-producing trees, questions remain about tapping sustainability and the physiological mechanisms that underpin winter-dormant-season stem-pressurization cycles, which create the pressures necessary for sap harvesting. I investigated aspects of tapping sustainability related to two important xylem functions, storage and transport. I measured nonstructural carbohydrate concentrations and radial growth of tapped and untapped sugar maples (Acer saccharum) and found a weak …

Assessing And Understanding Soil Characteristics, Amy Papineau

UNH Cooperative Extension

No abstract provided.

New Hampshire Shellfish Under Pressure: Physiological Effects Of Climate Change And Toxic Algal Blooms, Olivia Boyan

UNH URC Open (2026 and after)

Climate change driven effects on the ocean, including warming water, acidification, and changes in the presence of harmful algal blooms (HABs) are causing metabolic pressures on marine organisms, particularly in the Gulf of Maine. Shellfish are susceptible to these pressures because their metabolic processes including growth and respiration are influenced by water temperature, pH, and consumption of algal toxins. This study investigates the effects of ocean warming, acidification, and diet toxicity level on the growth and respiration of Blue mussels (Mytilus edulis), Eastern oysters (Crassostrea virginica), and Sea scallops (Placopecten magellanicus). Selected individuals were subjected to water treatments simulating ambient …

Presence Of Road Salts In Vernal Pools And Effects On Amphibian Development, Grace I. Bemis, Ella Mack

UNH URC Open (2026 and after)

Presence of Road Salts in Vernal Pools and Effects on Amphibian Development

Parasite Party: Investigating Ecological Drivers Of Trematode Parasite Prevalence Across The Isles Of Shoals, Aimee D. Bousquet, April Blakeslee, Amy Fowler, David Buck

UNH URC Open (2026 and after)

Parasite Party: Investigating Ecological Drivers of Trematode Parasite Prevalence Across the Isles of Shoals

Covering The Care: Why Financial Resources Matter For Health, Mark Bonica, Phd,Mba,Ms

All Materials

Where people end up in the income and wealth distribution has a powerful and lasting influence on how healthy they are and how long they live. This is not just a story about poverty versus comfort. Across the entire population, health improves step by step as financial resources increase. Researchers call this pattern the health gradient.

This brief explains why that gradient exists. Drawing on decades of research from economics, public health, and social epidemiology, it shows how limited financial resources shape health through multiple pathways that unfold over different time horizons—from immediate consequences to cumulative effects that build …

Template For A Lab/Group/Team Manual, University Of New Hampshire (Unh) Responsible Conduct Of Research & Scholarly Activity (Rcr) Committee

Integrity in Research and Scholarship

Lab/group/team manuals or handbooks are becoming more common in academic research settings as the research environment grows in complexity. Explaining in writing expectations for how a research group operates as well as providing resources for group members can be invaluable.

The University of New Hampshire (UNH) Responsible Conduct of Research & Scholarly Activity (RCR) Committee developed these templates to help researchers convey important and useful information to their research groups in a consistent manner. Each Principal Investigator (PI) and research group can choose the preferred version template (abbreviated or long) and customize the information to address topics relevant for their …

Eelgrass Distribution In The Great Bay Estuary And Piscataqua River For 2025: Final Project Report Submitted To The Piscataqua Region Estuaries Partnership, Michael Routhier, Raymond Grizzle, Taylor Goddard, Krystin Ward

PREP Reports & Publications

No abstract provided.

A Simple Guide To Responsible Authorship And Publication, Julie Simpson, Patricia B. Condon, Bonnie Brown, William C. Clyde, James J. Connell, Ramonda Kindle, Nathan A. Schwadron, John E. Sparrow, Xueting Sun, Engin Taze, May-Win Thein, Anita R. Tucker, Karen T. Van Gundy, James Wible

Integrity in Research and Scholarship

This guide examines the following aspects of responsible authorship and publication practices:

1. The significance and goals of publication
2. Publication mechanisms and responsible practices
3. The importance and guiding principles of authorship
4. The definition and responsibilities of an author
5. Responsible writing practices

Please note that throughout this document there are links to examples of concepts/issues within certain disciplines for illustrative purposes. The examples may not be relevant to all disciplines so check guidance specific to the applicable discipline before proceeding. This guide was adapted from an online training module that was part of the University of New …

Seagrassnet Monitoring In The Great Bay Estuary, Nh/Me Field Season 2024, Kalle Matso, Lara M. Martin, Christopher Whitney, Amanda Giacchetti, Trevor Mattera, David M. Burdick, Thomas K. Gregory

PREP Reports & Publications

No abstract provided.

Evaluating The Role Of Seaweeds In Dairy Production: Impacts On In Vitro Ruminal Fermentation, And In Vivo Mineral Utilization And Metabolic Status, William Mitchell Sims

Doctoral Dissertations

Dietary inclusion of seaweed in ruminant diets has been studied for more than 5 decades. Early research in seaweed focused primarily on potential health benefits, but recent interest has shifted the paradigm for its use as a nutritional tool to mitigate greenhouse gas emissions. As new seaweeds are identified for their ability to reduce gas emissions, the pendulum will swing once more to understand the impact seaweeds have on ruminant health and production. The overall objective of this dissertation is to investigate digestibility and fermentation, as well as alterations in metabolic and mineral status in ruminants fed various seaweed species. …

Evolution Of Regulatory Pathways In Vibrio Fischeri Strains Impacts Biofilm Phenotypes And Symbiotic Capacity And Curriculum Interventions Differ In Their Impact On Microbiology Utility Value In Nursing Students, Jennifer Calawa

Doctoral Dissertations

Vibrio fischeri strains vary in their capacity to form mutualisms with animal hosts such as the Hawaiian bobtail squid Euprymna scolopes, yet these differences are often not explained by phylogeny. Successful colonization requires biofilm production, which is tightly controlled by a complex network of two-component system regulators including hybrid histidine kinases BinK and RemK, as characterized in the model symbiont strain ES114. Divergence in biofilm network architecture or regulatory logic may lead to strain-specific differences in biofilm formation, limiting symbiotic potential. Part I of this work investigates genetic divergence underlying reduced colonization capacity in strain H905, a planktonic isolate and …

Focal Engine: Filling A Gap Between Game Engines And Big-Data Scientific Visualization Packages, Kindrat Beregovyi

Doctoral Dissertations

This dissertation presents Focal Engine, a novel 3D visualization engine designed to bridge the gap between game engines and scientific visualization tools. Game engines offer accessible interfaces and high-performance rendering but struggle with large-scale scientific datasets, while tools like ParaView and VTK handle complex data structures effectively but lack intuitive editing capabilities and modern rendering features. Focal Engine combines the accessibility and rendering performance of game engines with the data handling capabilities and analytical tools of scientific visualization platforms. The engine's capabilities are validated through multiple applications and projects, for example: HabiCAT 3D performs 3D complexity measurements on ocean floor …

Development And Characterization Of Bulk Dsdna-Based Materials Using Biologically Derived Plasmid Dna, Wynter Amythyst Paiva

Doctoral Dissertations

Double-stranded DNA (dsDNA) exhibits many unique sequence-independent properties that remain underutilized in materials science. The exceptional length, solubility, biocompatibility, imageability, molecular recognition capabilities, and topological control of DNA makes it an ideal candidate for the creation of bespoke biomaterials and investigation of fundamental relationships in polymer physics. Unfortunately, translation of DNA-based materials from the microscale to macroscale has been hindered by source constraints and limitations in chemical modification of biologically derived DNA. This work seeks to expand the utility of dsDNA from the benchtop to real world applications. Establishing dsDNA as a commodity polymer will aid in the development of …

Adrift: The Influence Of Shelf Circulation And Larval Dispersal On Coastal Biogeography At Basin And Global Scales, Will Lush

Doctoral Dissertations

The dispersal of larvae plays an important role in determining the distribution of benthic meroplanktonic organisms in the coastal ocean. The work presented in this defense uses biophysical modeling approaches to examine the interaction of larval dispersal with coastal circulation and the impact of these interactions on contemporary coastal biogeography at global scales.I begin by presenting a novel method for validating numerical dispersal estimates against drifter observations from the Global Drifter Program. We find that median dispersal estimates match observations to within 5 percent, while model estimates underpredict the spread of drifters around this median by between 30 and 50 …

Regional Analysis Changes In The Salt Marsh: How The Past Is Influencing The Present, Elizabeth May Gorrill

Master's Theses and Capstones

Salt marshes are critical coastal wetlands that provide valuable ecosystem services including coastal erosion control, carbon sequestration, water quality improvement, fisheries habitats, and recreational and economic opportunities for coastal communities. To better understand salt marshes and the changes occurring within the systems due to environmental and human factors, monitoring of established sites is conducted to look at variables such as vegetation cover, elevation, fauna, and vertical accretion. Methodological differences amongst monitoring efforts can result in data that has differing implications when analyzed and interpreted, so documentation of protocols (and any deviance from them) is imperative when bringing together datasets. The …

The Effects Of Graded Amounts Of Nicotinic Acid On Cow Health, Colostrum Yield And Quality Of Prepartum Multiparous Jersey Cows And Growth In Their Subsequent Calves, Lydia Joy Valentine

Master's Theses and Capstones

This study evaluated the impact of graded amounts of nicotinic acid (NA) with a negative DCAD diet on cow health, colostrum composition and calf growth performance of Jersey cattle. We hypothesized that NA supplementation would increase IgG concentration of colostrum, increase calf intestinal absorption and growth and improve cow metabolic health. Thirty multiparous Jersey cows were blocked by calving date and assigned to either 0, 8 or 16 g/d of NA supplementation on top of the -40 mEq/kg DCAD dry cow diet. Blood samples were collected weekly for ketone analysis. Urine was collected three times weekly for pH, creatinine and …

Pitch Modeling And Control Of Subcarangiform Robotic Fish, Margaret Grace Enderle

Master's Theses and Capstones

The development of biomimetic robotic fish has been an ongoing research topic for the last 30 years. Here, researchers have explored biomimetic propulsion and maneuverability mechanisms, studied energy efficiency in comparison to live fish, and developed autonomous control algorithms for these extremely nonlinear systems. This work studies a multi-linkage, single-actuator propelled biomimetic robotic fish, the Ghost Uncrewed Performance Platform Submersible (GUPPS), developed at the University of New Hampshire. A set of symmetrically driven, static pectoral fins are added to the original platform to enable diving and surfacing capabilities by controlling the vehicle Angle of Attack (AoA) through pitch and yaw …

Characterizing Sei Whale (Balaenoptera Borealis) Movement Patterns In The Gulf Of Maine, Emma Vergow

Master's Theses and Capstones

Sei whales are difficult to visually monitor due to their cryptic presence and lack of breaching. Passive acoustic monitoring has the potential to expand knowledge of sei whale movement ecology. The present study characterizes sei whale movement patterns related to migration dynamics in the Gulf of Maine. Five bottom-mounted Acoustic Long-Term Observatory landers, each equipped with a tetrahedral array of omni-directional hydrophones, were deployed throughout the Gulf of Maine as part of the Acoustic and Environmental Observation Network (AEON) in the Northwest Atlantic project. A combination of manual and automated detections was used to assess sei whale daily and seasonal …

Great Bay Estuary (Grb) Nerr Nutrient Metadata January 2024 Through December 2024, Thomas K. Gregory, Lara M. Martin

PREP Reports & Publications

No abstract provided.

Quality Assurance Report For Year 2024 Estuarine Water Quality Datasonde Monitoring, Lara M. Martin

PREP Reports & Publications

No abstract provided.

Fall 2025 Environmental Sciences Seminar Series, Jessica Gersony, Jessica Gersony

NRESS Seminars

The field of ecology contains systemic issues and inequalities due to a history of exclusionary forces (e.g. colonialism). In response, there is a push to reimagine research labs outside of these forces. In this talk, Gersony will present the PLACE (PLant physiology, Art, and Community Engagement) lab’s artistic and scientific exploration of northeastern tree responses to climate change, and also discuss the lab’s broader project of reimagining a new way forward centered around joy, art, and community.