Digital Commons Network^™

Navigating The Complexities Of Time: Innovative Approaches For Accurate And Resilient Time Series Modeling, Sepideh Koohfar

Doctoral Dissertations

The application of time series data has a rich history, and its relevance continues to expand due to recent advancements in artificial intelligence (AI) and autonomous systems. These technological developments have driven the collection and utilization of time series data to new heights, propelling its significance to unparalleled levels. Deriving insights from time series data has become indispensable for effective decision-making in various domains, as it enables the identification of patterns, trends, and fluctuations that inform strategic actions and optimize outcomes. The core challenge lies in developing precise and reliable predictive models that effectively leverage the input data for accurate …

Artificial Intelligence Driven Magnetic Materials Discovery: From Data Extraction To Property Prediction, Yibo Zhang

Doctoral Dissertations

This dissertation presents an integrated artificial intelligence framework aimed at accelerating magnetic materials discovery by addressing key challenges in materials science: improving experimental characterization techniques, efficiently extracting structured data from scientific literature, developing comprehensive materials databases, and creating reliable predictive models.

We first develop a UNet-enhanced vector field electron tomography (VFET) approach for three-dimensional magnetic structure reconstruction. This method addresses the missing wedge problem in experimental data collection while maintaining computational efficiency, providing reliable experimental data crucial for materials research.

We introduce GPTArticleExtractor, a novel workflow leveraging large language models to automatically extract key information from scientific literature. Applied to …

Improving Understanding Of Fluvial Reach-Scale Solute Transport And Uptake Using A Particle Tracking Model And Random Forest Machine Learning Model, Jiaying Liu

Doctoral Dissertations

In addition to transporting flowing water, river systems carry dissolved nutrients and pollutants, which can experience chemical reactions, biological uptake, or retention in surface or hyporheic zones. This dissertation enhances our understanding of solute transport and uptake in river reaches through three main components. The first component involves the development of a novel curve-fitting model designed to capture the characteristics of pulse-release breakthrough curves (BTCs) from tracer studies with conservative solutes. The model, which was found to be applicable to a wide range of field studies, enables the rapid comparison of transport parameters among diverse field studies obtained under a …

Deformation-Induced Bonding Of Glassy Polymeric Films And The Diluent Effect, Ajay Vallabh

Doctoral Dissertations

Bonding between two polymer films can be achieved through various heat- or chemical-based methods. Recently, our group has discovered the novel phenomenon of deformation-induced bonding (DIB) for solid-state glassy polymers in time on the scale of a fraction of a second at ambient temperatures substantially below the bulk glass transition temperatures (T_g). DIB is achieved by bulk plastic compression, which triggers the molecular mobility of polymer chains to cause interpenetration across the interface even in a glassy regime.

First, we performed a series of experiments to evaluate solid-state, deformation-induced bonding in organic polymer blends composed of films of hydroxypropyl methylcellulose …

Characterization Of Sediment-Flow Interactions In Tidally Driven Salt Marsh Environments, Elijah Rousseau

Master's Theses and Capstones

Salt marshes are effective sediment traps and under static sea levels are known to increase in elevation over time. However, current sedimentation rates are insufficiently high to keep up with the estimated sea level rise. Strategies such as the mud motor, which proposes the injection of dredged sediment into incoming flood tides, require a deeper understanding of how tidal flows evolve in complex estuarine systems and how suspended sediment is dispersed and deposited in vegetated environments. Two field deployments occurred in the summer of 2023 to study the mechanisms of sediment transport and accretion along a horizontal marsh transect in …

Characterizing Tropical Forest Structure Using Semivariance And Crown Delineation, Brittani Joy Evon Chapman

Master's Theses and Capstones

The study of terrestrial carbon stocks is essential to understand global carbon cycles and the magnitude of anthropogenic carbon emissions. Forests are significant terrestrial carbon stores, with the above ground biomass of the Brazilian rainforest alone conservatively estimated to contain ten percent of the terrestrial carbon stock (Asner et al., 2001; Drake et al., 2002; Keller et al., 2004; Lloyd et al., 2007; Truehaft et al., 2014; Cushman et al., 2021). The Amazon Basin primarily consists of closed-canopy tropical forest, covering 5.8 x 106 km2 interspersed with substantial portions of cerrado surrounding the Amazon River and its tributaries in the …

Feasibility Analysis On Bluff Body Wake Detection Via Cost-Effective Sensors And State And Parameter Estimation Techniques, Patrick Michael Close

Master's Theses and Capstones

This thesis investigates the feasibility of using Uncrewed Aerial Vehicles (UAVs) and existing state estimation techniques for detecting aerodynamic wakes around bluff bodies. Aerodynamic wakes are complex, turbulent flow regions created by obstacles. Accurately measuring these wakes is crucial for applications such as optimizing wind energy production, improving aircraft safety, and enhancing atmospheric research. Traditional measurement methods, such as ground-based sensors or piloted aircraft, have significant limitations, including restricted spatial coverage and high operational costs. UAVs, with their versatility and cost-effectiveness, present an alternative approach to measuring wakes in challenging environments.

This research focuses on three state estimation techniques: the …

Behavioral And Physiological Effects Of Ocean Acidification On Juvenile American Lobsters (Homarus Americanus), Todd Edward Stelling

Master's Theses and Capstones

Increased absorption of anthropogenic carbon dioxide (CO2) into the world’s oceans has resulted in ocean acidification (OA). Acidification induces physiological and behavioral responses from marine invertebrates that vary by taxa. Resilience to OA has been noted in crustaceans, though negative impacts are still reported. It has been shown that the American lobster (Homarus americanus) can be physiologically impacted by acidified conditions. We explored the effects of acidification on the hemolymph chemistry and the foraging behavior of juvenile American lobsters (carapace length, CL, 29 - 52 mm, 42 +/- 1.3 mm). We exposed 28 juvenile lobsters to individual pH values ranging …

Synthesis And Testing Of Peptide Iron Probes In Cell Studies, Fran Gomez

Master's Theses and Capstones

The study of iron within cells has advanced significantly since the Fenton reaction was proposed as a mechanism for ferroptosis. Various chemical probes have been developed for examining iron and reactive oxygen species (ROS), both of which are involved in the Fenton reaction. Iron, the most abundant transition metal in the human body, primarily exists as Fe(II) and Fe(III) in the cellular environment. The labile iron pool (LIP) is suspected to predominantly exist as Fe(II) due to endogenous reductants. Under ferroptotic conditions, Fe(III) produced in the Fenton reaction can be reduced back to Fe(II), even when chelated, re-inducing hydroxyl radical …

Technical Report: Technical Support For Developing And Field Testing In Situ Bioassays In The Surface Mixing Layer Of Marine Waters At Oil Spill, G. A. Burton, A. Crane, B. Chadwick, G. Rosen, G. Stewart, S. Allan, O. Garcia-Pineda

Coastal Response Research Center

An in situ technology was developed to assess the toxicity of oil spills to aquatic organisms in the water column. This technology, named the Drifting Exposure and Effects Assessment Ring (DEEAR), is comprised of a bioassay tool known as the Sediment Ecotoxicity Assessment Ring (SEA Ring), mounted within a drifting drogue known as the Drifting Particle Simulator (DPS). The technology also includes a UV fluorometer that continuously senses oil fluorescence, as well as passive sampling devices that can be used to quantify average concentrations of oil-based compounds. The DEEAR system was tested in the field in 2019, after which refinements …

2021 Carroll County Advisory Council Minutes And Agendas, Mikayla Cerney

UNH Cooperative Extension

No abstract provided.

Incremental Nicotinic Acid Supplementation To Preweaned Dairy Calves: Effects On Growth, Blood Metabolites, Purine Derivatives And Indirect Rumen Development, Tamanna Islam

Master's Theses and Capstones

The purpose of this experiment was to investigate the dose response of nicotinic acid (NA) on body growth, blood glucose and β-hydroxybutyrate (BHBA) concentrations, and urinary purine derivatives (PD) excretion in preweaned dairy calves. A total of 40 (22 male and 18 female) Holstein dairy calves averaging initial body weight 42.5 ± 5.60 kg (mean ± SD) were blocked by birth and randomly assigned to 1 of 4 levels of NA: (1) 0 g/d (CON), (2) 2 g/d (2NA), (3) 4 g/d (4NA), and (4) 6 g/d (6NA). Following parturition, calves were separated immediately from their dams before suckling and …

2022 Carroll County Advisory Council Minutes And Agendas, Mikayla Cerney

UNH Cooperative Extension

No abstract provided.

Resilience And Positive Feedbacks: Water Quality Management And Eelgrass Health In Great Bay Estuary, Nh/Me Technical Report, Anna Mikulis, Chris Peter, Cory Riley, David M. Burdick, Kalle Matso, Kelle Loughlin, Lynn Vaccaro, Miguel Leon, Thomas Gregory, Tom Lippmann, William H. Mcdowell

PREP Reports & Publications

This comprehensive technical report outlines the project’s motivations, context, methods, results, and discussion of results in the context of local management concerns. It provides evidence-based recommendations for decision makers in the region looking to better understand water quality, light, and eelgrass relationships.

Resilience And Positive Feedbacks: Water Quality Management And Eelgrass Health In Great Bay Estuary, Nh/Me “So What” Report, Anna Mikulis, Chris Peter, Cory Riley, David M. Burdick, Kalle Matso, Kelle Loughlin, Lynn Vaccaro, Miguel Leon, Thomas Gregory, Thomas C. Lippmann, William H. Mcdowell

PREP Reports & Publications

This report provides a high-level summary of the project and its implications. With a focus on lessons learned, the report distills why and how the project's results are important for future eelgrass management. Geared toward broader audiences, this report can be used for public education and engagement with eelgrass management.

Quality Assurance Report For Year 2023 Estuarine Water Quality Datasonde Monitoring, Lara M. Martin

PREP Reports & Publications

No abstract provided.

Ultra-Relativistic Electron Flux Enhancement Under Persistent High Speed Solar Wind Stream, L R. Alves, L A. Da Silva, V Deggeroni, J P. Marchezi, P R. Jauer, G B D Silva, D G. Sibeck

Faculty Publications

The physical mechanisms usually applied to explain the relativistic electron enhancement have been delved into to elucidate non-adiabatic electron acceleration resulting in the ultra-relativistic electron population observed in the outer radiation belt. We considered multisatellite observations of the solar wind parameters, magnetospheric waves, and particle flux to report an unusual local acceleration of ultra-relativistic electrons under a prolonged high-speed solar wind stream (HSS). A corotating interaction region reaches the Earth’s bowshock on August 3, 2016, causing a minor geomagnetic storm. Following this, the magnetosphere was driven for 72 h by a long-term HSS propagating at 600 km/s. During this period, …

Ultra-Relativistic Electron Flux Enhancement Under Persistent High Speed Solar Wind Stream, L R. Alves, L A. Da Silva, V Deggeroni, J P. Marchezi, P R. Jauer, G B D Silva, D G. Sibeck

Faculty Publications

The physical mechanisms usually applied to explain the relativistic electron enhancement have been delved into to elucidate non-adiabatic electron acceleration resulting in the ultra-relativistic electron population observed in the outer radiation belt. We considered multisatellite observations of the solar wind parameters, magnetospheric waves, and particle flux to report an unusual local acceleration of ultra-relativistic electrons under a prolonged high-speed solar wind stream (HSS). A corotating interaction region reaches the Earth’s bowshock on August 3, 2016, causing a minor geomagnetic storm. Following this, the magnetosphere was driven for 72 h by a long-term HSS propagating at 600 km/s. During this period, …

Factors That Influence Colostrum Yield: Dry Period Length, Peter S. Erickson

UNH Cooperative Extension

No abstract provided.

Major Choices: Students’ Personal Intelligence, Considerations When Choosing A Major, And Academic Success, Kateryna Sylaska, John D. Mayer

UNH Personality Lab

A student’s choice of major is influenced by their parents and peers, as well as by the quality of the college department that offers the major and by broader cultural and economic issues. The student’s own personality, including their ability to reason about themselves and their interests, also contributes to the choice and its outcomes. In a preliminary study, we developed a Choice of Major Scale that depicts key aspects of students’ consideration of their major. Then, across three studies (Ns = 304, 466, and 492), we examined the students’ personal intelligence, defined as their capacity to reason about their …

Regimes Of Stratified Turbulence At Low Prandtl Number, Kasturi Shah, Gregory P. Chini, Colm-Cille P. Caulfield, Pascale Garaud

Faculty Publications

Quantifying transport by strongly stratified turbulence in low Prandtl number ( $Pr$ ) fluids is critically important for the development of better models for the structure and evolution of stellar and planetary interiors. Motivated by recent numerical simulations showing strongly anisotropic flows suggestive of a scale-separated dynamics, we perform a multiscale asymptotic analysis of the governing equations. We find that, in all cases, the resulting slow–fast systems take a quasilinear form. Our analysis also reveals the existence of several distinct dynamical regimes depending on the emergent buoyancy Reynolds and Péclet numbers, $Re_b = \alpha ^2 Re$ and $Pe_b = Pr …

Regimes Of Stratified Turbulence At Low Prandtl Number, Kasturi Shah, Gregory P. Chini, Colm-Cille P. Caulfield, Pascale Garaud

Faculty Publications

Quantifying transport by strongly stratified turbulence in low Prandtl number ( $Pr$ ) fluids is critically important for the development of better models for the structure and evolution of stellar and planetary interiors. Motivated by recent numerical simulations showing strongly anisotropic flows suggestive of a scale-separated dynamics, we perform a multiscale asymptotic analysis of the governing equations. We find that, in all cases, the resulting slow–fast systems take a quasilinear form. Our analysis also reveals the existence of several distinct dynamical regimes depending on the emergent buoyancy Reynolds and Péclet numbers, $Re_b = \alpha ^2 Re$ and $Pe_b = Pr …

Unh Extension Plant Diagnostic Lab Sample Submission Form, Shyloh Favreau

UNH Cooperative Extension

No abstract provided.

New Hampshire Residents' Perceptions Of Aquaculture Show Opportunities For Education, Anna Maccaroni, Emily Whitmore, Lindsey Williams

Carsey Publications

In this brief, authors Anna Maccaroni, Emily Whitmore, and Lindsey Williams discuss the results of a June 2024 statewide survey of New Hampshire residents to understand their perceptions of aquaculture. Conducted by the University of New Hampshire’s Survey Center on behalf of New Hampshire Sea Grant, participants were asked about their opinion of aquaculture in New Hampshire, how much they have read or heard about aquaculture, whether they are aware of aquaculture activity in New Hampshire, and how frequently they consume seafood products. The authors report that the majority of New Hampshire residents are unfamiliar with aquaculture and are not …

Military Communication And Leadership In Conflict Resolution, Aspen Hailey Dyer

M.S. in Leadership

This research investigates the effectiveness of conflict resolution strategies in military settings, examining the roles of leadership styles, communication techniques, and cultural competence. Using a qualitative approach, the research is examined through thematic analysis to identify common patterns, and evaluation which mostly focuses on transformational, transactional, and adaptive leadership styles, assessing their impact on conflict resolution outcomes. Additionally, the effectiveness of communication strategies, such as active listening and feedback mechanisms, are analyzed. Cultural competence is also explored, with attention to how personnel navigate conflicts in diverse, multicultural environments. Findings indicate that adaptable leadership, clear communication techniques, and higher levels of …

Aspect-Ratio-Dependent Heat Transport By Baroclinic Acoustic Streaming, Jacques Abdul Massih, Remil Mushthaq, Guillaume Michel, Gregory P. Chini

Faculty Publications

Standing acoustic waves have been known to generate Eulerian time-mean ‘streaming’ flows at least since the seminal investigation of Lord Rayleigh in the 1880s. Nevertheless, a recent body of numerical and experimental evidence has shown that inhomogeneities in the ambient density distribution lead to much faster flows than arise in classical Rayleigh streaming. The emergence of these unusually strong flows creates new opportunities to enhance heat transfer in systems in which convective cooling cannot otherwise be easily achieved. To assess this possibility, a theoretical study of acoustic streaming in an ideal gas confined in a rectangular channel with top and …

Addressing Once More The (Im)Possibility Of Color Reconstruction In Underwater Images, Yuri Rzhanov, Kim Lowell

Center for Coastal and Ocean Mapping

Color is an important cue in object recognition and classification problems. In underwater imagery, colors undergo strong distortion due to light propagation through an absorbing and scattering medium. Distortions depend on a number of complex phenomena, the most important being wavelength-dependent absorption and the sensitivity of sensors in trichromatic cameras. It has been shown previously that unique reconstruction in this case is not possible—at least for a simplified image formation model. In this paper, the authors use numerical simulations to demonstrate that this statement also holds for the underwater image formation model that is currently the most sophisticated.

Aspect-Ratio-Dependent Heat Transport By Baroclinic Acoustic Streaming, Jacques Abdul Massih, Remil Mushthaq, Guillaume Michel, Gregory P. Chini

Faculty Publications

Standing acoustic waves have been known to generate Eulerian time-mean ‘streaming’ flows at least since the seminal investigation of Lord Rayleigh in the 1880s. Nevertheless, a recent body of numerical and experimental evidence has shown that inhomogeneities in the ambient density distribution lead to much faster flows than arise in classical Rayleigh streaming. The emergence of these unusually strong flows creates new opportunities to enhance heat transfer in systems in which convective cooling cannot otherwise be easily achieved. To assess this possibility, a theoretical study of acoustic streaming in an ideal gas confined in a rectangular channel with top and …

Nh 4-H Youth Enrollment Paper Form, Unh Cooperative Extension

UNH Cooperative Extension

No abstract provided.

Sample Lesson Of Maple Tales, Sarah Grosvenor

UNH Cooperative Extension

No abstract provided.