This dissertation study investigated how Somali refugee families living in Nairobi, Kenya experience and negotiate their religious and secular identities through literacies. This study provided detailed experiences and reflections of individuals––children and parents about their literacies. The children in this study learned to read in English and Kiswahili in school, and they learned to read in classical Arabic—three languages they do not speak at home. The study explored Qur’anic schools which literacy researchers have long overlooked, yet these are spaces that shape many children’s rich multilingual, multiliterate, and multiscriptual repertoires while, at the same time, shaping and negotiating their fluid identities. Three themes, literacy as social practice, liturgical literacy, and funds of knowledge offered a complimentary lens through which this community was studied. Literacy, as a social practice, demonstrates how certain social groups use specific socially constructed literacies within specific contexts to achieve various goals. The concept of liturgical literacy foregrounds how minority languages, such as Classical Arabic, have great symbolic value for communities, including those who neither speak nor understand the language, while funds of knowledge conceptualize the knowledge and related activities present in homes that have the potential for contributing positively to children’s learning. Using the ethnographic methodology, this inquiry spanned six sites and focused on participants during their interactions with literacy, orality, and text for eight months. The study occurred in three homes, two Dugsis, and one school site. A rich description of the community was achieved by presenting language and literacy practices in a multi-sited ethnography. This dissertation ultimately also offers contemporary relevance: investigating a community whose literacies are invisible, minoritized, and marginalized, and aimed to inform educational researchers, policymakers, and teachers who are devoted to rethinking what counts as literacy, for whom, in what contexts, and with what kinds of consequences. In a time of increased movement of people across borders, this research has important implications for teacher preparation, theories of language learning, and literacy education.

Nanoparticle (NP) assembly is critical where NPs are organized into complex superstructures through direct and indirect interactions. Long-range NP orders have nanoscale locational selectivity, orientational alignment, and scalable micropatterning, which are indispensable for enabling multiple functionalities and improving the performances of different systems. Though nanoparticles can self-assemble into organized nanostructures via simple drying thermodynamics, scalability has been a primary issue. Thus, this research focuses on more scalable manufacturing for directed NP assembly. First, 3D printing was used for template fabrications with varying topology features. Next, nanoparticle engineering with colloidal and surface studies leads to desirable NP packing on template surfaces. Finally, the processed devices will also demonstrate a few applications of surface micropatterning with nanoscale particle orders. Specifically, a few manufacturing procedures involve (i) stereolithography (SLA)/layer-by-layer dip coating, (ii) continuous liquid interface projection (CLIP)/ink writing, (iii) fused deposition melting (FDM)/direct ink writing, and (iv) multiphase direct ink writing (MDIW)/wet etching. To demonstrate the applicability of hybrid manufacturing, a broad range of nanoparticles, including carbon nanofibers (CNFs), MXene nanoflakes, and boron nitride nanoplatelets (BNNPs) were studied in this research. With well-managed template physics and NP dispersion control, nanoparticle orientational alignment and positional preferences are driven by short- and long-range intermolecular interactions (e.g., convective, van der Waals, capillarity, shear, and other secondary bonding). The printed devices displayed multifunctional properties, i.e., anisotropic conductivity, piezoresistive and chemical sensitivity, mechanical durability, and heat dissipation capabilities, for microelectronic applications. This fabrication technique shows enormous potential for rapid, scalable, and low-cost manufacturing of hierarchical structures, especially for micropatterning of nanoparticles not easily accessible through conventional processing methods.

The issue of sex trafficking has been heightened the last several years but has deep history with racial injustice. Black women are disproportionately the victims of sex trafficking and criminalized in prostitution. However, within nonprofit agencies that help provide services and resources to these Black women, the women providing services do not proportionality represent the population being served. To investigate this problem of the lack of diversity and representation within antitrafficking organizations, the research conducts interviews with several Black women who are working for an antitrafficking organization. This study highlights the importance of representation within an organization to have better outcomes and participation of services without tokenizing the Black woman being hired. The research connects the individual experiences of being a token within an organization with the racial roots of sex trafficking to highlight the importance of representing the individuals being served. In order to accomplish this, the research employs qualitative interpretive research methods through semi structured interviews. It employs a critical race feminist theory approach to data analysis to show how Black women in antitrafficking organizations are tokenized but struggling to balance being the most likely to represent the women they are trying to serve.

Understanding how and why animals choose what to eat is one of the fundamental goals of nutritional and behavioral biology. This question can be scaled to animals that live in social groups, including eusocial insects. One of the factors that plays an important role in foraging decisions is the prevalence of specific nutrients and their relative balance. This dissertation explores the role of relative nutrient content in the food selection decisions of a species that is eusocial and also agricultural, the desert leafcutter ant Acromyrmex versicolor. A dietary choice assay, in which the relative amount of protein and carbohydrates in the available diets was varied, demonstrated that A. versicolor colonies regulate relative collection of protein and carbohydrates. Tracking the foraging behavior of individual workers revelaed that foragers vary in their relative collection of experimental diets and in their foraging frequency, but that there is no relationship between these key factors of foraging behavior. The high proportion of carbohydrates preferred by lab colonies suggests that they forage to nutritionally support the fungus rather than brood and workers. To test this, the relative amounts of 1) fungus, and 2) brood (larvae) was manipulated and foraging response was measured. Changing the amount of brood had no effect on foraging. Although decreasing the size of fungus gardens did not change relative P:C collection, it produced significant increases in caloric intake, supporting the assertion that the fungus is the main driver of colony nutrient regulation. The nutritional content of naturally harvested forage material collected from field colonies was measured, as was recruitment to experimental diets with varying relative macronutrient content. Field results confirmed a strong colony preference for high carbohydrate diets. They also indicated that this species may, at times, be limited in its ability to collect sufficiently high levels of carbohydrates to meet optimal intake. This dissertation provides important insights about fundamental aspects of leafcutter ant biology and extends our understanding of the role of relative nutrient content in foraging decisions to systems that span multiple trophic levels.

Least squares fitting in 3D is applied to produce higher level geometric parameters that describe the optimum location of a line-profile through many nodal points that are derived from Finite Element Analysis (FEA) simulations of elastic spring-back of features both on stamped sheet metal components after they have been plasticly deformed in a press and released, and on simple assemblies made from them. Although the traditional Moore-Penrose inverse was used to solve the superabundant linear equations, the formulation of these equations was distinct and based on virtual work and statics applied to parallel-actuated robots in order to allow for both more complex profiles and a change in profile size. The output, a small displacement torsor (SDT) is used to describe the displacement of the profile from its nominal location. It may be regarded as a generalization of the slope and intercept parameters of a line which result from a Gauss-Markov regression fit of points in a plane. Additionally, minimum zone-magnitudes were computed that just capture the points along the profile. And finally, algorithms were created to compute simple parameters for cross-sectional shapes of components were also computed from sprung-back data points according to the protocol of simulations and benchmark experiments conducted by the metal forming community 30 years ago, although it was necessary to modify their protocol for some geometries that differed from the benchmark.

Multisensory integration is the process by which information from different sensory modalities is integrated by the nervous system. This process is important not only from a basic science perspective but also for translational reasons, e.g., for the development of closed-loop neural prosthetic systems. A mixed virtual reality platform was developed to study the neural mechanisms of multisensory integration for the upper limb during motor planning. The platform allows for selection of different arms and manipulation of the locations of physical and virtual target cues in the environment. The system was tested with two non-human primates (NHP) trained to reach to multiple virtual targets. Arm kinematic data as well as neural spiking data from primary motor (M1) and dorsal premotor cortex (PMd) were collected. The task involved manipulating visual information about initial arm position by rendering the virtual avatar arm in either its actual position (veridical (V) condition) or in a different shifted (e.g., small vs large shifts) position (perturbed (P) condition) prior to movement. Tactile feedback was modulated in blocks by placing or removing the physical start cue on the table (tactile (T), and no-tactile (NT) conditions, respectively). Behaviorally, errors in initial movement direction were larger when the physical start cue was absent. Slightly larger directional errors were found in the P condition compared to the V condition for some movement directions. Both effects were consistent with the idea that erroneous or reduced information about initial hand location led to movement direction-dependent reach planning errors. Neural correlates of these behavioral effects were probed using population decoding techniques. For small shifts in the visual position of the arm, no differences in decoding accuracy between the T and NT conditions were observed in either M1 or PMd. However, for larger visual shifts, decoding accuracy decreased in the NT condition, but only in PMd. Thus, activity in PMd, but not M1, may reflect the uncertainty in reach planning that results when sensory cues regarding initial hand position are erroneous or absent.

Trace evidence is an essential component of forensic investigations. Anthropogenicmaterials such as fibers and glass have been well studied for use in forensic trace evidence, but the potential use of retroreflective beads found in soils for forensic investigations is largely unexplored. Retroreflective glass beads are tiny spheres mixed into pavement markings to create reflective surfaces to reduce lane departure accidents. Retroreflective glass beads are a potentially new source of trace evidence for forensic investigations.
Analysis of the spatial distribution and chemical compositions of retroreflective glass beads recovered from 17 soil samples were analyzed and compared to see if there are striking variations that can distinguish samples by source. Soil samples taken near marked roads showed significantly higher concentrations of glass beads, averaging from 0.18 bead/g of soil sample to 587 beads/g of soil, while soil samples taken near unmarked roads had average range of concentration of 0 bead/g of soil to 0.21 bead/g of soil. Retroreflective glass beads come from pavement markings, thus soil samples near marked roads are expected to have higher concentrations of glass beads. Analysis of spatial distribution of glass beads showed that as sample collection moved further from the road, concentration of glass beads decreased.
ICP-MS results of elemental concentrations for each sample showed discriminative differences between samples, for most of the elements. An analysis of variance for elemental concentrations was conducted, and results showed statistically significant differences, beyond random chance alone for half of the elements analyzed. For forensic comparisons, a significant difference in even just one element is enough to conclude that the samples came from different sources. The elemental concentrations of glass beads collected from the same location, but of varying differences, was also analyzed. ANOVA results show significant differences for only one or two elements. A pair-wise t-test was conducted to determine which elements are most discriminative among all the samples. Rubidium was found to be the most discriminative, showing significant difference for 67% of the pairs. Beryllium, potassium, and manganese were also highly discriminative, showing significant difference for at least 50% of all the pairs.

For this project, I commissioned and recorded five new works for contrabassclarinet from five different composers. Composition parameters were given to each
composer before they started writing which detailed what needed to be included in each
work. Four of the composers were asked to utilize a single, difficult aspect of playing the
instrument, which included intonation, low note technique and response, phrasing, and
articulation. For the fifth work, the composer was asked to incorporate all parameters of
the project. Because of the differences between contrabass clarinet designs, I recorded
each work three times using the Leblanc Vito, Leblanc “Paperclip”, and Selmer Model 41
contrabass clarinets to demonstrate that the works were adaptable and playable. In this
paper, I will outline the parameters of the project, describe the instruments used for
recording and provide a performance guide for each work. It is my hope that these works
will provide an enjoyable way for future contrabass clarinetists to become more
proficient performers of the instrument.

Concrete develops strength rapidly after mixing and is highly influenced by temperature and curing process. The material characteristics and the rate of property development, along with the exposure conditions influences volume change mechanisms in concrete, and the cracking propensity of the mixtures. Furthermore, the structure geometry (due to restraint as well as the surface area-to-volume ratio) also influences shrinkage and cracking. Thus, goal of this research is to better understand and predict shrinkage cracking in concrete slab systems under different curing conditions. In this research, different concrete mixtures are evaluated on their propensity to shrink based on free shrinkage and restrained shrinkage tests.Furthermore, from the data obtained from restrained ring test, a casted slab is measured for shrinkage. Effects of different orientation of restraints are studied and compared to better understand the shrinking behavior of the concrete mixtures. The results show that the maximum shrinkage is near the edges of the slab and decreases towards the center. Shrinkage near the edges with no restraint is found out to be more than the shrinkage towards the edges with restraining effects.

An important facet of daily memory function is prospective memory, which is one’s ability to complete established intentions in the appropriate temporal and spatial context. Many factors contribute to impairments in prospective memory, such as limited cognitive resources or aging. A factor that has been subject to recent investigation is how cannabis use may have an impact on the mechanisms that contribute to prospective memory. Cannabis use has been on the rise across the world, and in the United States more states are pushing to legalize its recreational use, if they haven’t already. As this substance becomes more easily accessible, akin to alcohol use, the necessity to investigate its potential consequences on cognition is needed now more than ever. Prospective memory is an appropriate measure of cannabis-induced deficits due to the wide literature looking at neural correlates of the component mechanisms that contribute to successful prospective memory, attentional and memory processes. The current study employed two experiments to measure this argued claim. Experiment 1 replicated well-defined effects from the prospective memory literature by measuring task accuracy (memory), response times (attention), and pupillary dynamics (attention). Informed by the research looking at the brain regions suspected of experiencing the most functional impairment, Experiment 2 aimed to extend these findings with a sample of participants following acute cannabis administration, however, results indicated cannabis group performance was similar in accuracy and showed faster mean latencies to that of the control group.