726 Works

Variational methods with dependence structure

Mingzhang Yin &
It is a common practice among humans to deduce, to explain and to make predictions based on concepts that are not directly observable. In Bayesian statistics, the underlying propositions of the unobserved latent variables are summarized in the posterior distribution. With the increasing complexity of real-world data and statistical models, fast and accurate inference for the posterior becomes essential. Variational methods, by casting the posterior inference problem in the optimization framework, are widely used for...

Physical inactivity does not impair the insulin-lowering effects of moderate-intensity exercise, yet it does impair fat metabolism

Michael Dial &
Acute exercise and physical activity improve insulin sensitivity, glucose tolerance, and postprandial lipemia, although recent research suggests that physical inactivity may attenuate some of these healthy metabolic benefits of exercise. This study aimed to determine how two days of physical inactivity and physical activity affected exercise-induced changes in plasma insulin, glucose, and triglyceride concentrations during an oral glucose tolerance test (OGTT) performed the next morning. Five untrained men (n=2) and women (n=3) completed three five-day...

An actor prepares (to audition)

Michael Andrew Killianey
This thesis outlines the development of a script for a short performance piece entitled "An Actor Prepares (to Audition)." The piece is approximately twenty minutes long and features the author, a candidate for a Master of Fine Arts degree in acting from the Department of Theatre and Dance at the University of Texas at Austin. This thesis describes the process the author used to select and prepare a body of audition material and contains a...

AI, Mental Health, and COVID-19

S. Craig Watkins
You are viewing a publication from UT Affiliates that was in the Good Systems Network Digest in May 2020

Joint Model of App-Based Ridehailing Adoption, Intensity of Use and Intermediate Public Transport (IPT) Consideration among Workers in Chennai City

Gopindra Sivakumar Nair & Chandra R. Bhat
You are viewing a past publication from the Good Systems Network Digest in July 2020.

A Model of Deadheading Trips and Pick-Up Locations for Ride-Hailing Service Vehicles

Gopindra S. Nair & Chandra R. Bhat
You are viewing a past publication from the Good Systems Network Digest in July 2020.

High-nickel layered oxide cathodes for high-energy-density lithium-ion batteries

The thriving energy-storage market has been motivating enormous efforts to advance the state-of-art lithium-ion batteries. The development of cathode materials, in particular, holds the key to realizing the high-energy-density and low-cost promise. Among the insertion-reaction cathodes currently in play, the layered oxides, especially the LiNiO₂-based high-Ni type, are being intensively pursued as one of the most promising candidates. However, the high-Ni layered oxides inherently encounter a trade-off between capacity and stability - the higher the...

Stable high energy density batteries based on microstructure modified Ni-rich lithium intercalating cathodes and a surface-stabilized metallic lithium anode

Ho Hyun Sun &
While lithium-ion batteries (LIBs) are widely used in electric vehicles (EVs), many customers are disinclined to buy EVs because of their limited range. Significant increase in the range requires higher specific capacity electrodes for an equal or higher operating voltage battery, exemplified in this thesis by a metallic lithium anode and a high-Ni content layered oxide cathode. The instability of the lithium metal surface and the particle-fracturing in the high-Ni layered oxides have in the...

Studies of electrode materials for lithium and sodium metal batteries

Melissa Lynn Meyerson
There is a need for higher capacity batteries to address the increasing energy demand for electric vehicles and portable technologies. With more than ten times the capacity of current graphite anodes, Li metal is an ideal replacement; however, it suffers from safety and efficiency problems that have so far prevented it from being commercialized. In particular, Li metal has a tendency to form dendritic structures during electrodeposition, which not only present a high surface area...

A kaleidoscope: The role of the social work practitioner and the strength of social work theories and practice in meeting the complex needs of people trafficked and the professionals that work with them

Noël Busch-Armendariz, Maura Busch Nsonwu & Laurie Cook Heffron
This qualitative research study explored responses to trafficking in persons. Fifty-five (n = 55) interviews were collected and data were analyzed using qualitative iterative processes. The social worker and the utilization of social work perspectives provided a strong and effective framework for service delivery and effective interdisciplinary collaboration. The ecological, strengths-based, and victim-center approaches were a benefit to survivors and professionals specifically around coordinated efforts, trust-building, and increased cultural competence. Findings also support that individuals...

Machine-learning-based models, methods, and software for intensity, vulnerability, and risk assessment of Central U.S. induced earthquakes

Farid Khosravikia
Since 2009, the Central U.S. has been subjected to a new type of seismic hazard attributed to human activities from the petroleum industry. Since then, there has been an increase in the number of earthquakes in the Central U.S. from an average of 25 per year in 2008 to 365 in 2017. These earthquakes can adversely affect the safety of infrastructure in the region, considering most were designed with minimal to no seismic detailing considerations...

Stuttering in academia : minimizing stereotype threat for college students who stutter

Danielle Rae Werle
Although stuttering is a neurophysiological disorder with a genetic predisposition, the persisting stereotype threat is that stuttering is psychological with persons who stutter being mis-perceived as more nervous, less intelligent, and less capable of fulfilling roles that require significant communication. These misperceptions have been documented in children who do and do not stutter, adults who do and do not stutter, parents, and professionals across a wide variety of disciplines. In the university setting, professors’ perceptions...

Civic arts practices : emerging practices at the intersection of urban planning and the arts

Lynn Ann Kalsched Osgood &
Within the planning profession, the arts and culture sector has been emerging over the past a decade as a vital component of urban and rural planning processes. Once considered to be only adjacent to the more central issues of housing, economic development, and infrastructure planning, the arts sector is now becoming an integrated part of each of these areas of practice. Planning frameworks most often incorporate arts and culture in the form of “discrete elements,”...

Cenozoic history of northeastern Chispa quadrangle, Trans-Pecos, Texas

Tertiary beds of tuff and related sedimentary deposits with intercalated lava flows, comprising an aggregate thickness of slightly more than 1,000 feet, rest with an angular unconformity upon Cretaceous and Permian. This volcanic sequence is placed in the McCutcheon group (Eifler, 1951), and no names are proposed for the individual members. The early flows are found in a basin-like depression with a very thick water-laid tuff section directly above, but the remaining flows and tuffs...

Oil and gas in the great state of Tejas : centering land tenure histories of fracking geographies within the Texas-Mexico border landscape

Andrea Christina Wirsching
This dissertation examines the Texas-Mexico border oil and gas landscape and the unequitable distributions of impacts and benefits these extractive activities produce. I situate my work within critical, interdisciplinary literature on the relationship between the exploitation of natural resources and wealth distribution, and the explicit problematization of inherent uniqueness of border spaces. I utilized a critical, multi-disciplinary framework drawing from political ecology, planning, and border studies, to critique and inform more nuanced vulnerability assessments and...

Investigations in integrative and molecular bioscience

John Andrew Hawkins &
Modern biology is going through a revolution of new methods and insights resulting from the new availability of high-throughput DNA sequencing technology. I here present work contributing mathematical and computational methods for gaining insight from large DNA sequencing data sets at three distinct levels. First, I present a method for improving the accuracy and efficiency of DNA barcodes, short sequences of DNA used to label individual molecules in pooled samples. Many DNA sequencing applications depend...

Structural history of part of Kent Station quadrangle, Culberson and Jeff Davis Counties, Texas

The Kent Station quadrangle lies on the southeastern flank of the Apache Mountains of Trans-Pecos Texas. By means of a plane-table and alidade survey, structural contours were constructed which revealed the structure as a gentle south-dipping homocline which has been modified by normal faults of a northwest strike, a syncline with the same trend, and gentle warps. The area has been subjected to movements which date from pre-Ordovician time. During pre-Pennsylvanian time it was the...

Brand message strategies and consumer motivations to respond

Jung Hwa Choi
The overarching purpose of this dissertation is to first provide a theoretical and empirical background for research on motivation and branding strategies; a review of the literature on social media, social media marketing, and brand association is provided for context. From this, three research questions are presented. Chapter 3 describes the procedures, methodology, results and discussion briefs of two studies. Finally, Chapter 4 discusses the expected theoretical and managerial contributions of this study and directions...

The role of identity and self-reflection in museum selfies : netnographic insights from Instagram

Seo Jeong Heo &
Art museum provides excellent stage for identity work. Art can be mediation to reflect people’s identities. It is an expression of our thoughts, emotions, intuitions, and desires, and it’s about sharing the way we experience the world, which for many is an extension of personality. Taking selfies at museums where great artworks are displayed can be a way to integrate ourselves to the meaning of that artworks. Furthermore, online social media, where identity work emerges...

Efficient deep learning for sequence data

Jiong Zhang &
Deep learning has achieved great success in many sequence learning tasks such as machine translation, speech recognition, and time series prediction. Powerful deep sequence learning models, including recurrent neural networks (RNNs) and Transformers, have tremendous expressive power to fit very complex functions. However, they sometimes cannot be applied to real-world scenarios due to lack of efficiency. On one hand, deep learning models usually have millions of parameters and requires computationally intensive algorithms to train. This...

Advisory Board Grant Update

Allyssa Guzman, Joshua Ortiz Baco, Ben Brumfield, Sara Brumfield, Bryce Mclin & Albert A. Palacios

Improved multidirectional Gaussian Mixture Models applied to probability of collision of resident space objects

Chase Patrick Brown &
As the number of Resident Space Objects (RSOs) in Earth Orbit continues to rise by not only increased trackability but also an unprecedented number of commercial launches, conjunction assessment (CA) remains a paramount issue. Maintaining accuracy in probability of collision calculations is specifically of interest because any disparity will cause operators and analysts to lose trust, dismantling the entire CA system. Methods of state uncertainty propagation remain the most tractable way of controlling computational efficiency...

Between the goddess and the world : religion and ethics among Thirunangai transwomen in Chennai, India

This dissertation is an ethnographic study of the place of goddess Angalamman in the Thirunangai transfeminine lifeworld in the city of Chennai in southern India. It offers a detailed account of two interrelated aspects of the Thirunangai-Goddess attachment: the role Angalamman plays in anchoring transfeminine identity and the ethical entailments this intimate connection to a deity has for thirunangais. The intertwined poetics of identity and ethical relationality is the focus of this dissertation. It argues...

Women's insecurity and exclusion in public spaces : a call to action and initial response

Emilie Marie Twilling &
Sexual harassment in public spaces and women’s consequential fear, insecurity, and exclusion are critical and overlooked issues in contemporary urban design and planning. Urban migration, shifting gender roles, as well as failing infrastructure necessitate immediate intervention. If urban practitioners fail to validate and address the issue before (re)building takes place, they ensure gender inequality is (once again) built into the physical environment. My professional report serves as a call-to-action. In response, I propose a two-step...

Compiler and runtime systems for homomorphic encryption and graph processing on distributed and heterogeneous architectures

Roshan Dathathri
Distributed and heterogeneous architectures are tedious to program because devices such as CPUs, GPUs, and FPGAs provide different programming abstractions and may have disjoint memories, even if they are on the same machine. In this thesis, I present compiler and runtime systems that make it easier to develop efficient programs for privacy-preserving computation and graph processing applications on such architectures. Fully Homomorphic Encryption (FHE) refers to a set of encryption schemes that allow computations on...

Registration Year

  • 2020

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