Digital Commons Network^™

Environmental Dimensions Of Colonial Settlement: A Palynological Investigation Of La Cienega, New Mexico, Kyle W. Edwards

Graduate Masters Theses

Using palynological data, this project explores how changing land use practices associated with successive waves of colonial settlement shaped local environments in La Cienega, New Mexico. This is accomplished by linking collected pollen data to known historic occupations beginning with pre-colonial Puebloan populations and continuing through the present day, encompassing both Hispanic and Anglo-American colonial occupations. The data were collected from a single sediment core taken at a small pond located within La Cienega. Pollen from 12 samples was analyzed, providing a 600-year record of changes within local plant communities. The collected data are interpreted in relation to known archaeological …

Examining Sociological Differences And The Influence Of Prey Distribution And Environmental Variability In The Distribution Of A Top Marine Predator, The Bottlenose Dolphin (Tursiops Truncatus), Stefanie K. Gazda

Graduate Doctoral Dissertations

The purpose of this dissertation was to examine the influence of environmental variability on the distribution of prey, and the influence of prey spatial structure and habitat variability may have on the distributions of bottlenose dolphins (Tursiops truncatus). Additionally I examined how sociological differences (behavior type and the changes in a foraging behavior specific to Cedar Key Florida) influences the relative roles of bottlenose dolphins within the population.

The Gowans et al. scheme assumes that small groups form small communities and that foraging groups are small and rare as there are few foraging benefits to promote grouping. Using network analysis, …

Critical Forces That Structure Subtidal Ecological Communities In The Gulf Of Maine, And The Integration Of Invasive Species Into These Communities, Martine C. Wagstaff

Graduate Doctoral Dissertations

Shallow subtidal epibenthic communities worldwide are under threat from exploitation, pollution, eutrophication, acidification, climate change, and invasive species, with implications for ecosystem diversity, productivity, function, and services. Subtidal ecosystems in the Gulf of Maine are particularly impacted, making it crucial to understand these habitats so that our impacts can be predicted and mitigated. I investigated the basic ecological forces that structure shallow subtidal epibenthic communities in this region, and how invasive species integrate themselves into these communities. I used community phylogenetic and functional trait analyses to investigate if invertebrate communities in the rocky subtidal are assembled via deterministic or random …

The Politics Of Official English: Exploring The Intentions And The Outcomes Behind English-Only Policies In The United States, David Gonzalez Nieto

Graduate Doctoral Dissertations

Although the Constitution did not declare English the official language of the United States, its complete linguistic dominance in such a linguistically diverse nation is unparalleled. Despite its supremacy, the last three decades have witnessed a renewed nationalistic movement that claims the role of English is threatened and that its establishment as the official language of the United States is crucial to protect the language and the unity of the nation.

So far, attempts to institutionalize English at the federal level have failed, but 28 states have adopted English as their official language and/or legislation that limits the use of …

Marital History And Retirement Security: An Empirical Analysis Of The Work, Family, And Gender Relationship, Lauren A. Martin Palmer

Graduate Doctoral Dissertations

This dissertation investigates the relationship between marital history and individuals’ retirement resources, namely Social Security, employer-sponsored pensions, and non-housing wealth. Prior research provides a foundation for understanding marriage’s positive relationship to retirement security, and suggests that marriage is financially beneficial and can even lessen some external factors that would otherwise damage a family’s financial situation. Yet changing demographics, with fewer people in first marriages and rising numbers of individuals experiencing divorce and choosing to remain unmarried, suggest our understanding of this relationship for today’s retirees may be limited. The purpose of this research is to identify which aspects of complex …

Automatic Detection And Quantification Of Bluff Erosion Events In Single Image Series, Martin D. Hellwig

Graduate Masters Theses

Many communities along coastlines and riverbanks are threatened by water erosion and hence an accurate model to predict erosion events is needed in order to plan mitigation strategies. Such models need to rely on readily available meteorological data that may or may not be correlated with the occurrence of erosion events. In order to accurately study these potential correlations, researchers need a quantified time series index indicating the occurrence and magnitude of erosion in the studied area. We show that such an index can be obtained by creating and analyzing a single image series using relatively cheap consumer grade digital …

The Integration Of African Americans In The Civilian Conservation Corps In Massachusetts, Caitlin E. Pinkham

Graduate Masters Theses

The Civilian Conservation Corps employed young white and black men between the ages of eighteen and twenty-five. In 1935 Robert Fechner, the Director of the Civilian Conservation Corps, ordered the segregation of Corps camps across the country. Massachusetts’ camps remained integrated due in large part to low funding and a small African American population. The experiences of Massachusetts’ African American population present a new general narrative of the Civilian Conservation Corps. The Federal government imposed a three percent African American quota, ensuring that African Americans participated in Massachusetts as the Civilian Conservation Corps expanded. This quota represents a Federal acknowledgement …

Impact Of Parental Stress On Asthma Management Behaviors And Health Outcomes: A Longitudinal Analysis Of Inner City School-Aged Children, Amanda Constance Green

Graduate Doctoral Dissertations

Background. Asthma is a prevalent chronic condition with excess disease burden in school-aged, minority children from low income inner-city communities. Conceptualized within a nursing and socio-ecological framework, the purpose of this secondary analysis of a prospective study of inner-city school-aged children with asthma (School Inner-City Asthma Study [SICAS]) was to examine associations between characteristics of children and parents, parents stress, parent asthma management behaviors (AMB) and child asthma outcomes, including emergency (ED) visits for asthma, missed school and asthma control.

Methods. The sample included 351 school-aged children (7.9 years old, SD= 1.9 years; 53.0% male; 95.7% minority). Parents reported their …

The Role Of Valproic Acid, A Histone Deacetylase Inhibitor, In Reducing Anxiety Levels In Rats: An Epigenetics Study, Juliet Buteme

Honors College Theses

Rats, like humans, show personality traits: they are born with different anxiety levels (i.e., high (HAn) or low anxiety (LAn) levels). In this study, we investigated (1) if treatment with valproic acid (VPA) can lower anxiety level in trait anxiety rats and (2) how VPA may interact with environment (e.g., enriched (EE), standard (SE) and isolated environments (IE)). VPA is a deacetylase inhibitor that increases Histone 3 acetylation, a known epigenetic mechanism that interacts with stress response proteins, and treats epilepsy and mood disorders. Since rats reared in IE exhibit heightened anxiety levels as compared to those in EE, we …

Role Of The Orphan Crispr 2 In Enterococcus Faecalis, Andriy Barchuk

Honors College Theses

Enterococcus faecalis is a Gram-positive aerotolerant anaerobic bacterium primarily found as a member of the human and animal intestinal flora. Enterococcus faecalis along with 27 other species comprise the genus Enterococcus. Out of the whole genus E. faecalis and E. faecium are the second most common nosocomial cause for urinary tract and wound infections. The treatment of the infections is made even more complex due to E. faecalis resistance to last-resort drugs like vancomycin. An inverse relationship has been observed in the species between antibiotic resistance and presence of the CRISPR-cas locus. CRISPR-Cas (clustered, regularly interspaced short palindromic repeats and …

Correlates Of Awareness And Use Of The Hubway Bike Share Program And The Association With Weight Status, Lawrence H. Stahley

Graduate Masters Theses

Objective: The purpose of this study was to examine the correlates of awareness and use of the Hubway bike share program and assess the relationship between use and rates of overweight or obesity. Methods: Two-hundred, fifty-six students, faculty, and staff from the University of Massachusetts Boston (UMB) participated in this cross-sectional study. Participants completed an on-line survey during the fall of 2014 that assessed socio-demographics, behavioral and physical activity characteristics, Hubway awareness, and use of Hubway and personal bikes. Multivariable regression models were conducted to evaluate associations between socio-demographic and behavioral factors, and Hubway awareness, use, and the relationship with …

Quantum Mechanics With A Quartic Dispersion Law, Joanna Ruhl

Graduate Masters Theses

Creation of three-dimensional matter waves, the three-dimensional analog of one-dimensional solitons, has been a goal of experimental physics for some time. A recent proposal has suggested that changing the dispersion law from quadratic to quartic for ultra cold atoms in a shaken lattice should allow for the creation of these objects. In this thesis, we develop the theoretical basis for quantum mechanics with a quartic dispersion law. The probability current functional is constructed from the corresponding time-dependent Schrödinger equation, and used to derive the junction conditions that connect the derivatives of the wavefunction on one side of a potential discontinuity …

The Effect Of Labor Unionization On Corporate Investment Efficiency, Yu Zhang

Graduate Masters Theses

This paper examines the relationship between labor unionization rates and corporate investment efficiency using 55,300 firm-year observations from 1983–2002. I find evidence that labor unionization rates are negatively associated with underinvestment and overinvestment, which suggests that labor unions can improve investment efficiency. I also find that labor unions and financial reporting quality are complementary in improving investment efficiency.

Taxonomy Of The Bitentaculate Cirratulidae (Polychaeta), Stacy A. Tewari

Graduate Masters Theses

The bitentaculate cirratulid polychaetes are an important faunal element of both near shore and deep-sea benthic faunal communities. The true diversity of the family is currently unknown due to a large number of undescribed species and erroneously applied “cospmopolitan” names being applied to local species. Cirratulids have been misidentified even in the local waters near the University of Massachusetts Boston. The current study presents six new species from North America. Caulleriella venefica, Chaetozone anasimus, Chaetozone diodonta, and Chaetozone hystricosus are described from Boston Harbor and Massachusetts Bay where only two species had previously been reported. Aphelochaeta bullata …

A Case Study Of An Urban Elementary School Chinese Language And Culture Program At The Boston Renaissance Charter Public Schools (Brcps), Jinhui Xu

Graduate Doctoral Dissertations

Very few urban elementary African American and Hispanic students have access to foreign language programs. Thus, students of color have historically been under-represented in foreign language study. At the same time, urban elementary foreign language programs for economically disadvantaged African American and Hispanic students might level the playing field for these students and help prepare them to participate more fully in a global economy and community in the future. The present case study is based on a mixed methods approach using logic model and overlapping spheres of influence theory to examine the impact of the Boston Renaissance Charter Public School …

Fluxes Of Dissolved Organic Carbon During Storm Events In The Neponset River Watershed, Keith Thomas Cialino

Graduate Doctoral Dissertations

The transport of dissolved organic carbon (DOC) and chromophoric dissolved organic matter (CDOM) from land to coastal environments strongly influences coastal ecosystems. The presence of first flush phenomena due to rainwater runoff traveling from land into waterways can greatly affect carbon fluxes to coastal areas. This research utilizes sensors, autosamplers, and standard watershed sampling in order to assess for the presence of first flush and its significance. A rainfall simulator was built in order to collect runoff on two land use types. Time series data suggest that first flush of dissolved organic carbon was present for all rainfall intensities simulated …

Examining The Toxicity, Exposure, And Regulatory Approach To Potential Human Health Risks Of The Algal Toxin Domoic Acid, Thomas H. Angus

Graduate Doctoral Dissertations

Domoic acid is a neurotoxin produced by the marine diatom genus Pseudo-nitzschia and causes cell death primarily in the area of the brain responsible for long-term memory. The resulting severe illness has been termed amnesic shellfish poisoning. Domoic acid accumulates in shellfish and planktivorous fish that consume Pseudo-nitzschia, resulting in exposure to humans through consumption of planktivorous seafood. A regulatory standard in seafood was developed shortly after its discovery in 1987 to protect against acute effects. This regulatory standard has not been revised despite significant recent data in the scientific literature.

This dissertation is divided into four sections: (1) …

Native Interactions And Economic Exchange: A Re-Evaluation Of Plymouth Colony Collections, Kellie J. Bowers

Graduate Masters Theses

This research furthers our understanding of colonial-Native relations by identifying and analyzing artifacts that indicate interaction between Native Americans and English settlers in Plymouth Colony archaeological collections. This project explores the nature of these interactions, exposing material culture's role in both social and economic exchanges. Selected 17th-century collections were excavated in modern Plymouth, Massachusetts, and nearby Marshfield and Kingston. My examination includes identifying materials exchanged between the Wampanoag and English settler groups in archaeological collections through scholarly literature and comparative 17th-century sites. This project draws on the documentary resources to provide contextualized insights on the relationships formed by and around …

Research For The Advancement Of Green Chemistry Practice: Studies In Atmospheric And Educational Chemistry, Steven Gene Cullipher

Graduate Doctoral Dissertations

Green chemistry is a philosophy of chemistry that emphasizes a decreasing dependence on limited non-renewable resources and an increasing focus on preventing pollution byproducts of the chemical industry. In short, it is the discipline of chemistry practiced through the lens of environmental stewardship. In an effort to advance the practice of green chemistry, three studies will be described that have ramifications for the practice. The first study examines the atmospheric oxidation of a hydrofluorinated ether, a third-generation CFC replacement compound with primarily unknown atmospheric degradation products. Determination of these products has the potential to impact decisions on refrigerant usage in …

Ubiquitous And Unfamiliar: Earthenware Pottery Production Techniques And The Bradford Family Pottery Of Kingston, Ma, Martha L. Sulya

Graduate Masters Theses

Redware ceramic sherds are frequently found in New England historical archaeological sites; however, detailed data has not always been published regarding excavated New England earthenware pottery production sites. The goal of this thesis is to contribute to the small body of research on New England redware production through the study of the life and ceramic production techniques of the Bradford family pottery. Their workshop operated in Kingston, Massachusetts, from the 1780s to the 1870s, a time when stoneware production and industrial scale ceramics manufacturing took hold in America. Documentary study of the Bradford family and the ceramics industry shows that …

The Impact Of Nursing Hours And Hospital And Patient Characteristics On Medicare Hospital Acquired Conditions: A National Pooled Cross-Sectional Secondary Data Model And Analysis, Terry Kahlert Eng

Graduate Doctoral Dissertations

Background: Previous research and quality improvement initiatives have underscored the prevalence of healthcare acquired conditions (HACs) and their associated costs in American hospitals. In response to these findings, in 2008, The Centers for Medicare and Medicaid Services identified 10 condition categories that they would no longer pay for if acquired during hospitalization. The conditions were selected based on high cost, high volume, or both, assigned to a higher paying medical severity diagnostic related group (MS-DRG), and were deemed preventable through application of evidence-based guidelines. The Health Quality Outcomes Model and a Path Model guided the study.

Objective: To quantify the …

What Academic Grades Mean To Seventh Grade Students, Margo Joan Moore

Graduate Doctoral Dissertations

This study explores how seventh grade students in an urban school district make meaning for their teacher-assigned report card grades. A great deal of research has been done on report card grades from the perspective of teachers and administrators, but few studies have examined what teacher-assigned grades mean to middle school students. This qualitative study attempts to develop an understanding of the meanings attributed to teacher-assigned grades by 56 seventh grade English Language Arts (ELA) students in an urban middle school in Massachusetts.

Three major research questions were addressed: 1) How do 56 seventh-grade English Language Arts students in an …

Analysis Of English Language Learner Performance On The Biology Massachusetts Comprehensive Assessment System: The Impact Of English Proficiency, First Language Characteristics, And Late-Entry Ell Status, Mary A. Mitchell

Graduate Doctoral Dissertations

This study analyzed English language learner (ELL) performance on the June 2012 Biology MCAS, namely on item attributes of domain, cognitive skill, and linguistic complexity. It examined the impact of English proficiency, Latinate first language, first language orthography, and late-entry ELL status. The results indicated that English proficiency was a strong predictor of performance and that ELLs at higher levels of English proficiency overwhelmingly passed. The results further indicated that English proficiency introduced a construct-irrelevant variance on the Biology MCAS and raised validity issues for using this assessment at lower levels of English proficiency. This study also found that ELLs …

Mind The Gap: The Integration Of Physical And Mental Healthcare In Federally Qualified Health Centers, Karen R. Monaghan

Graduate Doctoral Dissertations

In the United States, approximately 50 percent of people experience mental illness during their lifetimes (Cunningham, 2009). However, previous studies estimate that up to 80 percent of people living with a mental illness do not access services (Mackenzie et al., 2007). While there are numerous explanations for such disparity, this study posited that stigma associated with mental illness is a significant contributory factor.

In an attempt to address the gap between prevalence of mental illness and access to services, the Patient Protection and Affordable Care Act (PPACA), 2010 (US Government Printing Office, (a) 2011) mandated that Federally Qualified Health Centers …

Traitor Or Pioneer: John Brown Russwurm And The African Colonization Movement, Brian J. Barker

Graduate Masters Theses

The end of the Revolutionary War proved to be a significant moment in United States history. Not only did it signal the birth of a new nation, but it also affected the institution of slavery. Wartime rhetoric such as "All men are created equal," left the future of American slavery in doubt. Northern and mid-Atlantic states began to implement emancipation plans, and the question of what to do with free blacks became a pressing one. It soon became apparent that free blacks would not be given the same rights as white Americans, and the desire to have blacks removed from …

Gay Outlaws: The Alpine County Project Reconsidered, Jacob D. Carter

Graduate Masters Theses

Controversial from the beginning, the Alpine County project (1969-1971), a genuine, albeit unsuccessful, effort put forth by gay radicals to establish a self-governing separatist community in rural California, is a grossly misunderstood event in United States history. Contemporary historical interpretations hold that the project was primarily either a well-conspired hoax devised by Los Angeles Gay Liberation Front (LA-GLF) to attract mainstream media coverage of Gay Liberation, or a misguided effort toward systemic reform. However, evidence indicates that, for gay separatists who supported it, the project was an effort to achieve collective self-determination by creating a geographic haven for a budding …

Deep Coring, Viking Age Accumulation Rates And Household Wealth In Skagafjörður, Northern Iceland, Eric D. Johnson

Graduate Masters Theses

Discerning and explaining social and economic differences is a fundamental task of archaeology, but a fine-tuned measure of household wealth is often obfuscated by the inability to account for time or demographics in the archaeological record. This project tests the ways that Iceland, settled by Norse populations between A.D. 870 and 930, provides a temporally-sensitive mode of measuring household income through average rates of deposition of architectural material and fuel refuse while also providing a context for studying the emergence of inequality in a previously uninhabited landscape. In 2014, a deep-coring survey of 11 occupational sites was conducted in the …

Hydrodynamic Analogues Of Hamiltonian Systems, Francisco J. Jauffred

Graduate Masters Theses

A one-dimensional Hamiltonian system can be modeled and understood as a two-dimensional incompressible fluid in phase space. In this sense, the chaotic behavior of one-dimensional time dependent Hamiltonians corresponds to the mixing of two-dimensional fluids. Amey (2012) studied the characteristic values of one such system and found a scaling law governing them. We explain this scaling law as a diffusion process occurring in an elliptical region with very low eccentricity. We prove that for such a scaling law to occur, it is necessary for a vorticity field to be present. Furthermore, we show that a conformal mapping of an incompressible …

: : Poof : :, Caleb Nelson

Graduate Masters Theses

Storytellers have an interdependent relationship with their narratives. If you have ever told a lie, you understand. Stories take on a life of their own, as you consider the potential ramifications of each contingent piece. Definite sets of things happen as results of specific other things. If you throw an ax at me, only a few things can immediately happen, and our relationship will be forever changed. Events evolve. When we create or discover a narrative, we live by its logic. Upon consideration, a moment compels a series of moments modulated by a voice, a single perspective, a personal narrative, …

Recyclable Organocatalysis Of One-Pot Michael/Mannich/Lactamization Sequence For Asymmetric Synthesis Of Fluorinated Poly-Substituted 2-Piperidinones, Anthony P. Tran

Honors College Theses

2-piperidinone (δ-lactam), a bio-interesting nitrogen-containing six-membered ring compound, has attracted much interest from researchers both in synthetic and medicinal chemistry. Polysubstituted piperidine derivatives, such as the δ-lactam, serve as a synthon for numerous biologically relevant structures and pharmaceutical agents. A novel one-pot asymmetric Michael/Mannich/Lactamization sequence promoted by recyclable fluorous bifunctional cinchona alkaloid–thiourea organocatalysts is introduced for the synthesis of polysubstituted 2-piperidinones bearing four contiguous stereocenters, one of which is a fluorinated quaternary chiral center with excellent stereoselectivities (ee up to >99%, dr up to >20:1).