This dissertation uses the case of Putin’s Russia to examine how authoritarian regimes build relationships with their societies in a way that strengthens authoritarian rule. In contrast to the existing scholarship, which concentrates on redistributive politics, that is, on the autocrat’s capacities to buy the loyalty of the masses, I...
How do creative producers make their works, and how do their social interactions within creative industries shape the creative process? This study addresses these questions by drawing upon two years of ethnographic fieldwork and over 100 interviews with artists, dealers, curators, collectors, and art advisers in the New York City...
Education policy and funding increasingly foster the creation of school partnerships with external stakeholders, such as parents, neighborhood organizations, school district offices, and universities, as a strategy in improving student outcomes. In three independent but related studies, this dissertation sheds light on the specificities rarely addressed by the rhetoric championing...
The brain has a remarkable ability to rapidly adapt behavior. On the scale of development, the brain learns to control the complex dynamics of our limbs by forming and pruning synaptic connections. However, the motor system also learns on much shorter timescales, such as when learning to hit the bullseye...
Plasmonic chemistry is an emerging field of research that contains great promise for new chemical reactivity, but thus far has been improperly observed. The goals of using plasmonic chemistry typically revolve around the use of nonequilibrium charge carriers that migrate to the surface of a plasmonic substrate to perform redox...
Vegetation in dryland environments is often patchy in response to water limitation. This patchiness can take the form of periodic patterning at length scales much larger than that of an individual plant. Instances of patterns resembling leopard spots and tiger stripes are widespread in dry regions of Africa, Australia, and...
The mouse visual system has recently been shown to possess many of the properties observed in the visual systems of the classically studied carnivores and primates. An ever-expanding genetic toolkit has given researchers who study vision in mice many advantages unavailable in other species.
In this thesis I study the...
Since Spanish colonial rule to the present, mining has been one of the main economic activities in the Andes. Taking this fact into account, my dissertation explores how two major Andean countries’ cultural production reacted to mineral wealth exploitation from 1880 to 1930. By analyzing foundational novels and influential journalistic...
Polarized emission from aligned interstellar dust is both a crucial tool for studies of magnetism in the interstellar medium (ISM) and a troublesome contaminant in studies of the polarized cosmic microwave background. In each case, an understanding of the significance of the dust polarization signal requires well-calibrated models that accurately...
The tools of computational chemistry allow researchers to gain insight into chemical systems that would be difficult or impossible to gain experimentally. This dissertation discusses the application of several of these computational tools to chemical systems of interest. First, we present several studies of plasmon resonance in Ag nanoclusters using...
To check that changes in prevalence rates over time were not the result of changes in measurement, we conducted sensitivity analyses. We created a set of adjusted scoring algorithms to maximize comparability among the DISC- 2.3, DISC-IV, and DIS-IV criteria while minimizing alterations. This file shows the adjustments made to...
Inability to understand speech in the presence of background noise is one of the most common complaints of individuals with hearing impairment. Two hearing aid processing strategies specifically recommended for improved speech perception in noise include: digital noise reduction (DNR) and cognition-based wide dynamic range compression (WDRC) speed. While previous...
Prejudice based on a person’s low socioeconomic status (SES) has been largely understudied in social psychology. In my dissertation research, I argue that understanding a perceiver’s mental model of SES is crucial to explaining anti-poor prejudice. I borrow from work in anthropology to characterize two main mental models of SES—ascribed...
Makerspaces have become explosively popular in recent years. Many believe they hold promise as contexts for integrated STEAM (science, technology, engineering, arts, and math) learning, meta-disciplinary skill learning, and promoting interest and equity in STEAM. However, we still know relatively about what is actually learned in these spaces, how interest...
The development of targeted therapies has revolutionized cancer treatment and markedly increased patient survival time and reduced mortality rates. Yet, some cancers still have few treatment options and remain deadly. In these cases, the development of targeted therapy is critical. Here, we investigated two cancers that lack effective targeted therapies...
Worldwide, youth living with perinatally-acquired human immunodeficiency virus (PHIV) are at increased risk for cognitive dysfunction and developmental delay. Effects of the virus, chronic inflammation, and combination antiretroviral therapy (cART) during critical periods of brain development may disrupt normal cognitive development. Neuroimaging studies using structural magnetic resonance imaging (sMRI) allow...
Using interviews and friendship mapping with lesbian, gay, bisexual, transgender, queer, and ally (LGBTQ+) community members as well as ethnographic observations, this dissertation analyzes post-gay LGBTQ community in River City, a small, Midwestern city. My findings reveal a formation I call ambivalent community: even as participants express a desire for...
Responsibility is a central political concept, yet the dynamics of contemporary political life call into question commonsense accounts of individual moral responsibility; it is difficult to ascribe responsibility to individual agents when faced with political dilemmas like global climate change. In response to this dilemma, this project engages two questions....
Online platforms for learning to code such as Coursera, CodeCademy, and CodeSchool attract millions of learners and significantly expand the pool of self-starting developers, yet critical gaps in knowledge and experience remain between inexperienced learners and professionals. With vast amounts of professionally-authored source code made readily available by the client-server...
Spindle formation in mammalian cells requires precise spatial and temporal regulation of the kinesin-5 motor proteins which generate outward force to establish spindle bipolarity. A growing body of work suggests that phosphorylation of kinesin-5 motor domains is an important regulator of their motor characteristics and function in cells. My thesis...
In this thesis I develop and apply techniques to the masses and eccentricities of tran-siting exoplanets from their transit timing variations. These techniques include both analytic and numerical means for measuring planet masses and orbits and assessing the robustness of the inferred properties. I apply these techniques to a sample...
Over the last 20 years a new field of amorphous transparent conducting oxides (a-TCOs) has developed. The amorphous nature of these films makes them well suited for large area applications. In addition, a-TCOs can be made at low temperatures and through solution processing methods. These assets provide promising opportunities to...
Evidence-Based Behavioral Practice (EBBP) is a transdisciplinary systematic approach that emphasizes the use of best evidence in combination with clinical expertise, as well as patient preferences and values, to make clinically-informed decisions about care and treatment (Spring, 2007). Despite numerous benefits and strong policy support of EBBP, findings indicate that...
Atom probe tomography (APT) was used to analyze doping and alloying in low-dimensional electronic materials including thin film heterostructures, van der Waals materials, and colloidal quantum dots (QDs).
Firstly, APT was used to reveal structure-property relationship for low-dimensional thin film semiconductors used in electronic and opto-electronic devices. APT was shown...
Carbonate minerals are integral to life on earth, as reservoirs for CO2 in the earth’s natural carbon cycle and as the skeletal elements of abundant organisms like corals and plankton. Because of its relevance, availability, and low toxicity, calcium carbonate is also an important model system for phase transformations in...
Whether in the Synagogue or the Greek Orthodox Church, worshippers are physically active throughout chanted prayer, exhibiting a variety of metrical interactions between their voices and bodily movements. Existing scholarship on rhythm and meter, embodied music experience, and ritual indicate that metrical synchronization is a fundamental mode of sonic and...
This dissertation examines how filmic, literary, and popular musical performances of black female sexualities in the post- civil rights era both reveal and frustrate state-sanctioned infringements on black freedom. “The Paradox of Black Freedom: Black Female Sexuality in Contemporary Performance, 1965-2000” elucidates a powerful paradox wherein the US state enacts...
High-dimensional data are becoming increasingly available in various fields as data collection technology advances. Not only are we interested in knowing which variables are relevant to the response and which are not, but also a simpler model with less predictor variables is easier for interpretation and computational purposes. Furthermore, a...
As type 2 diabetes requires complex self-management behaviors to avoid long-term complications, it is crucial that practitioners understand the psychosocial factors that may affect diabetic patients’ chronic disease self-management. Previous literature has identified depression and sleep disturbance as salient psychosocial factors that may impede self-management behaviors and lead to less...
The Escherichia coli ribosome is a 2.4 MDa molecular machine that consists of a large subunit and a small subunit, and is the key catalyst in gene expression, responsible for synthesizing proteins from amino acids in a sequence-defined fashion with impressive speed and accuracy. Expanding the repertoire of ribosome substrates...
The form and function of neural circuits are shaped by experience during critical periods of development. Recently, our lab discovered an important outcome of critical period plasticity in the visual system, namely, binocular matching of orientation preference, whereby initially randomly aligned orientation preferences become matched in individual cells. Following this...
Smartphone is becoming ubiquitous and its sales proportions have exceeded the sales of personal computer systems since 2012. The number of smartphones will increase and perhaps at an even higher rate in the coming years. The computational capacity and numerous mobile applications benefit end user's daily life. At the same...
As Power and Energy become the limiting factors for computer designs and systems, a holistic approach for tackling inefficiencies needs to be adopted. Computations need to be classified based on their importance and impact on the end quality, power consumption, and runtime so that the system can perform the needed...
Background: Major Depressive Disorder (MDD) is a significant public health issue. Previous research on the pathophysiology of depression in adults has demonstrated abnormal neural processing associated with depression symptomatology including alterations in reward and aversion circuits. Loss aversion (LA), or the concept that individuals evaluate outcomes based on losses and...
This dissertation examines the gradual construction and contested meanings of U.S. slavery’s first western border. According to most historiography, Congress’s Northwest Ordinance of 1787 fixed the meaning of this border at the nation’s inception, constituting the Northwest Territory as the free opposite of slave territories south and west of the...
Efferocytosis is the anti-inflammatory removal of dying cells and cellular debris, occurring billions of times per person, per day as a part of homeostatic maintenance during natural cell turnover. Macrophages are major professional phagocytes of the immune system and are responsible for dead cell clearance during infection and injury. During...
Increasingly, people are engaging online and can participate in activities like searching for information, communicating with family and friends, and self-expression. However, some populations such as older adults, face barriers to online participation like device cost, access, and learnability, which prevent them from reaping the benefits of Internet use. Moreover,...
Minimal mathematical models are used to understand complex phenomena in the physical, biological, and social sciences. This modeling philosophy never claims, nor even attempts, to fully capture the mechanisms underlying the phenomena, and instead offers insights and predictions not otherwise possible. Here, we build and explore minimal dynamical systems models...
In this dissertation, I explored the pedagogical content knowledge of in-service high school educators recently assigned to teach computer science for the first time. Teachers were participating in a professional development program where they co-taught introductory computing classes with tech industry professionals. The study was motivated by three questions: (1)...
Granular solids consisting of various particle sizes exhibit the tendency to de-mix, or segregate, when caused to shear by external forces such as gravity. This well-known phenomenon is of special practical interest to many industries involved in the handling and transportation of bulk solids, where segregation can lead to adverse...
High performance structural materials are needed for Naval applications which require an excellent combination of yield strength, low-temperature impact toughness, ductility, ballistic-resistance, and weldability. This research investigates precipitation-strengthened HSLA-115 steels and ballistic-resistant 10 wt. % Ni steels, which have emerged as promising alternatives to the widely used HSLA-100 steels for...
Machine learning has been widely applied to solve intricate problems in finance. Yet in options theory, machine learning methods are less visited due to the structural complexity of the derivatives market. This dissertation focuses on using machine learning algorithms to obtain optimal decisions for three distinct option-related problems. In the...
MoS2 is a ubiquitous catalyst for hydrogenation and hydrogenolysis reactions for hydrotreating of petroleum sources for the removal of sulfur and nitrogen containing compounds. Through exploration of this activity, structural models for MoS2 as a series of stacked S-Mo-S platelets held together by Van der Waals forces has been developed....
This dissertation argues that mid-nineteenth-century definitions of personhood, citizenship, and nationality were largely constructed through the tropes and narrative structures of sentimental mourning. This argument is developed through examinations of a wide range of materials, including novels and first-person narratives, newspaper and magazine articles, medical and scientific texts related to...
The dissertation aims to explore the intersection between the artistic performance of blackness in contemporary Italian theater and the country's social stigmatization of black immigrants as a problem or national emergency. I argue that Italians live in a state of "historic forgetfulness" since they have not been able to absorb...
Growing concerns associated with global warming and the depletion of oil reserves have motivated significant research in support of sustainable polymers systems. In this thesis, biobased and biodegradable polymer blends and nanocomposites were created using a novel processing method, solid-state shear pulverization (SSSP). This process utilizes a modified twin-screw extruder...
Embryonic stem cells have the potential to differentiate into ectodermal, mesodermal and endodermal derivatives. This property makes them a valuable source of tissue specific progenitor and differentiated cells that can be used for cell replacement therapy. The first goal of this thesis is to test if cardiogenesis from embryonic stem...