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2022 TDR User Survey Report
(Texas Digital Library, 2024-09-19) Chan-Park, Christina; Sare, Laura; Waugh, Laura; Weber, Millicent; Zhou, Xuan
Report from the data collected from the 2022 Texas Data Repository (TDR) User Survey.
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"While I See You" : Transgressive Duality in Shakespeare's Twelfth Night and Monteverdi's L'Incordonazione Di Poppea
(2020-05) Barr, Ivey
Viola, the principal character of Shakespeare’s Twelfth Night, presents herself as a “eunuch” or castrato singer to pass as male after surviving a shipwreck. By doing so, she places herself in conversation with the operatic tradition of women in travesti (disguised or crossdressed) male roles, which developed from the popularity of the castrato singer. In this project, I illustrate that Viola represents a transgressive unity of contradictory selves by arranging both castrato and soprano pieces from Claudio Monteverdi’s early opera L’Incoronazione di Poppea as musical settings for three of Viola’s monologues. Further exploring the overlap between binaries, I revisit the doubling practices of early opera, such as Monteverdi’s work, which called for one virtuosic singer to play two or more contrasting roles, by digitally doubling my/Viola’s voice and body to create two-person scenes between her masculine and feminine aspects, representing her feminine onscreen and performing her masculine onstage alongside the filmed performance. This project, created from the liminal overlap of all these categories - live and digital, male and female, music and text, real and constructed - illustrates a cohesive whole that embraces the transgressive duality present within a single entity.
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A Novel Immune-interactive Surface Coating Approach to Induce Implant Osseointegration in Diabetic Conditions
(2023-08) Arteaga, Alexandra 1989-
Titanium (Ti) orthopedic devices are often used to restore the function of damaged bones. However, reciprocal effects between implant surfaces and tissues can affect the success and performance of the implant due to corrosion, micro motion, dislocation, infection, or the inflammatory response of surrounding tissues. Additionally, diabetic patients receiving implants exhibit higher rates of implant failure due to impaired osseointegration and systemic complications compared to non-diabetic patients, which contribute to poor outcomes in orthopedic treatments, such as fracture healing. Because there is an increasing diabetic population that will require the use of implants, there is an urgent need to determine underlying mechanisms of diabetes-induced poor osseointegration and bone repair. Retrieved implants and in vitro testing of discs in simulated diabetic environments were first analyzed to understand how diabetes affects Ti implant surfaces. All retrieved implants have some degree of surface damage (pitting attack, discoloration, scratches, delamination, etc.). Therefore, the goal of this dissertation was to develop a coating that mitigates failure modes and improves the predictability of implants in immunocompromised conditions. Two multifunctional dicationic imidazolium-based ionic liquids (IonLs) containing phenylalanine (1,10-bis(3-methylimidazolium-1-yl)decane diphenylalanine) and methionine (1,10-bis(3-methylimidazolium-1-yl)decane dimethionine) were first investigated as thin films to prevent direct adsorption and temporarily immobilize exogenous proteins on Ti surfaces. The selected protein for this study was High Mobility Group Box 1 (HMGB1), which has been shown to be involved in the recruitment of inflammatory and mesenchymal stem cells to implantation sites, contributing to healing and implant integration. The optimal IonL coating was chosen based on in vitro and in silico analysis. It was demonstrated that HMGB1 is stable when anchored by the IonL containing phenylalanine, which prevents protein denaturation from surface adherence. However, HMGB1 is redox sensitive and exists in different isoforms (fully- reduced HMGB1 (FR), a recombinant version of FR resistant to oxidation (3S), disulfide HMGB1 (DS) and inactive sulfonyl HMGB1(SO)), that can each have distinct biological functions in health and disease. Each isoform was applied to the IonL-Phe thin film and implanted subcutaneously to assess the inflammatory effects of surrounding tissues in response to the coating. From these studies, the 3S HMGB1 was selected as the most favorable with regard to tissue healing, to be further applied to orthopedic implants in a model of open reduction fracture fixation (ORIF) in tibias of diabetic rats. This coating conformation (Ti-IonL-HMBG1) was then used in the ORIF model to assess the fracture healing and osseointegration potential in diabetic and normoglycemic conditions. Overall, the results for the new coating pointed to beneficial outcomes in fracture healing of diabetic rats, achieving healing parameters comparable to non-diabetic rats. Altogether, this dissertation demonstrates the design and assessment of ionic liquid and exogenous HMGB1 as an immunomodulatory coating to improve osseous healing in diabetic conditions.
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Properties of Blade-coated Transparent Conducting Oxide Sol-gel Precursor Films on Plastic Substrates
(2023-05) Turner, Gary George 1999-
The transparent conducting electrode (TCE) industry is dominated by indium-tin oxide (ITO) films deposited on glass for rigid applications and flexible polymers such as polyethylene terephthalate (PET) for flexible applications. These applications can range from liquid crystal displays to light emitting diodes to perovskite solar cells, most of which require electrodes with the maximum possible optical transmittance and the minimum possible sheet resistance. ITO films are generally deposited on their substrates via chemical vapor deposition or sputtering, both of which are low-throughput processes, on the order of 1 m/min web speeds or batch-processed at slower rates. This research presents a novel solution-deposition method for an alternative chemistry to TCE films. Solution deposition is advantageous over chemical vapor deposition and sputtering because it can be undertaken in an open air environment without much energy applied to coating. The project focuses on doctor blade coating as an intermediate step between current batch- processing methods such as spin coating and future roll-to-roll (R2R) compatible methods such as slot-die coating, in order to understand the dynamics of meniscus coating. The process entails synthesis, coating, and post-processing of indium-zinc oxide (IZO) sol-gel precursor ink on PET substrates. The benefit of this chemistry is its flexibility compared to ITO, its capacity for room-temperature solution deposition, and its decreased reliance on indium. The compositional ratio of In:Zn is 7:3, whereas that of ITO is 9:1 In:Sn. 0.2 M IZO alone is not sufficient to support the desired electrical conductivity, however, so a randomly oriented solution-deposited silver nanowire (AgNW) mesh layer is added to the IZO layer on PET. This results in the architecture PET/AgNW/IZO that has shown promising results in terms of transparency and conductivity. It is shown in this research that the PET/AgNW/IZO architecture is capable of performing within the range of figures of merit (FoMs) of commercially available PET/ITO and is processable at approximately ten times the speed. In addition to a deep exploration of the mechanisms at play during the blade coating process of each of these layers, this report includes a technoeconomic analysis comparing the two architectures and the costs of each in order to establish that blade coated PET/AgNW/IZO is less expensive to manufacture than PET/ITO is to purchase. This has implications for the TCE industry as throughput demands grow higher and higher as our society demands more high performance optoelectronics, and R2R solution processing is a suitable alternative.
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Performance Analysis and Scope of Residue Number System in Digital Computing and Hardware Security
(2023-05) Olee, Shakil Mahmud 1996-
The Residue Number System (RNS) has become increasingly popular in digital signal processing and cryptography due to its innate parallelism and inherent non-linearity. RNS represents numbers as remainders when divided by chosen moduli and enables parallel processing, leading to efficient arithmetic operations. However, it requires computationally expensive conversions and careful selection of the moduli set to avoid precision loss and deal with overflow issues. In the field of hardware security, RNS is an attractive proposition because of its highly non-linear transfer function that makes it difficult for attackers to model or predict the behavior of the system. In this thesis, the scope of RNS in both efficient computing and hardware security has been analyzed thoroughly. The application of RNS in building a fast throughput Multiply and Accumulate (MAC) block through parallel processing has been demonstrated in a 65 nm CMOS process, where post-layout performance evaluations of the proposed RNS MAC demonstrate a 17% improvement in latency with an area-power consumption overhead of 12% when compared to the traditional binary MAC. Moreover, the promising aspect of the highly non-linear RNS in building a secure PUF has also been examined rigorously by carrying out ML attacks against different behavioral PUF circuit configurations.