Article discusses how, after one year of operation, the Ingenuity rotorcraft and the Perseverance rover continue their exploration missions on Mars. Succeeding the technology demonstration phase, by proving its flight capabilities, Ingenuity transitioned to a new mission stage to explore modes of flight exploration for future scouting missions. The author's research intends to analyze, using numerical simulations, the aerodynamic conditions such as those experienced by Ingenuity during its flight missions.

Article describes how development of solid lubricant materials that render reliable performance in ambient conditions, are amenable to industrial size and design complexities, and work on engineered surfaces is reported. This report presents the holistic exploration and correlation of structure-property-processing pertaining to the advancement of solid lubrication science.

The work is a collection of poems entitled The Sometime Joy, comprising a mix of poems completed before and during my studies at UNT. The manuscript is my second completed full-length work after my first manuscript, the unpublished Night, Translated. The Sometime Joy shares many of the same themes with its predecessor, although stylistically the more recent work hews much more strongly toward the infusion of speculative and fantastical elements (just one example being the apocalyptic poem "Petal Storm"). The speculative components of the collection allow me to express and utilize the full range of my imagination, to use poetry to explore alternate existences and to create allegories, such as the "Market" series of poems, where capitalism is embodied as a chimerical beast that would fit in a horror film. The collection functions as my exploration of the intersections between folklore and pop culture, a series of meditations on the strangeness of human perspectives and how the relation between perceiver and the perceived alloys and transforms both. The collection also delves into horrific subjects varying from serried monsters (wendigos, the capitalist system, J. Edgar Hoover), the apocalypse, and the capacity of mundane humans to be cruel to each other, but …

The aim of this thesis is to advance the field of solid lubrication science by developing coatings that provide reliable performance in ambient conditions, work on rough surfaces, and are amenable to industrial size and design complexities. Two different coating systems, Ti3C2Tx-MoS2 and Ti3C2Tx-Graphene Oxide blends, were studied in this work. The Ti3C2Tx-MoS2 nanocomposites were spray-coated onto rough 52100-grade steel surfaces, and their tribological performance was evaluated in a ball-on-disk configuration in a unidirectional sliding mode. The test results indicate that Ti3C2Tx-MoS2 coatings achieved superlubricity, which has not been previously reported for either pristine material under macroscale sliding conditions. The observed synergistic mechanism enabled the superlative performance, which was explained by the in-situ formation of a robust tribolayer responsible for sustained lubricity even at high contact pressures (>1.1 GPa) and sliding speeds (0.1 m/s). Processing, structure, and property correlation studies were conducted to understand the underlying phenomena. Raman spectroscopy, scanning electron microscopy, and transmission electron microscopy were used to reveal the formation of the tribolayer. The Ti3C2Tx-Graphene Oxide blends were also spray-coated onto rough-bearing steel surfaces, and their tribological assessment was carried out in ambient environmental conditions and high contact pressures in a ball-on-disc experimental setup. The coatings led to …

Article describes how Li-CO2 batteries with a theoretical energy density of 1,876 Wh kg−1 are attractive as a promising energy storage strategy and as an effective way to reduce greenhouse gas emissions by CO2 reduction and the formation of discharge product Li2CO3 and carbon. This article provides critical perspectives on the development of Li-CO2 batteries as well as a description of current issues and challenges associated with cathode catalysts, electrolyte, and anode for Li-CO2 batteries.

Presentation for the IIPC General Assembly and Web Archiving Conference held on May 10-12, 2023 in Hilversum, Netherlands. This presentation describes the process and outcomes of a 20-year project to archive the French electoral web by performing the first in-house crawl conducted by the Bibliothèque nationale de France.

The age-cutoff regression discontinuity design (RDD) has emerged as one of the most rigorous quasi-experimental approaches to determining program effects of prekindergarten on literacy and numeracy outcomes for children at kindergarten entry. However, few pre-K meta-analyses have focused attention on validity threats. The current random-effects meta-regression tests the moderating effects of prominent threats to validity, selection bias and sensitivity, on impact estimates generated from age-cutoff regression discontinuity studies from large-scale programs. Results from averaging dependent standardized mean difference effects suggested small positive moderating effects of total attrition and robust 3-month bandwidths on reading effects, but not on math. However, these results were not statistically significant. In contrast, results generated from robust variance estimation yielded a small statistically significant association between total attrition and math effects. These mixed results may warrant further research on prekindergarten evaluation methodology, evaluation estimation methods, and the totality of evidence used to inform policy.

Archive Activism is a memoir of activism rooted in a new way to converse with history—by rescuing it. Archive activists discover documents and other important materials often classified, “gone missing,” or sealed that somehow escaped the fireplace or shredder. It is an approach to LGBTQ advocacy and policy activism based on citizen archivery and original archival research to effect social change. Research=Activism is the formula growing out of Charles Francis’s personal story as a gay Texan born and raised during the 1950s and 1960s in Dallas. The rescues range in time and place from Francis’s first encounter with a raucous, near-violent religious demonstration in Fort Worth to attics loaded with forgotten historic treasures of LGBTQ pioneers. Archive Activism tells how Francis helped Governor George W. Bush achieve his dream of becoming president in 2000 by reaching out to gay and lesbian supporters, the first time a Republican candidate for president formally met with gay and lesbian Americans. This inspired Francis to engage with deleted LGBTQ history by forming a historical society with an edge, a new Mattachine Society of Washington, DC. For the first time, Archive Activism reveals how LGBTQ secrets were held for decades at the LBJ Presidential Library …

Ensemble performances program book from the 2022-2023 school year at the University of North Texas College of Music.

The objectives of the present dissertation were: (1) determine the relationships between time use in physical vs social leisure activities (PLA - SLA), and cognitive vs emotional leisure activities (CLA - ELA) by older adults age cohort (60-69, 70-79 and 80-plus yrs.); (2) ascertain the role of sex in moderating the relationship between time use in PLA-SLA and CLA-ELA by older adults age cohort; and (3) assess how employment status mediates the relationship between time use in PLA-SLA and CLA-ELA by older adults age cohort with moderation by sex. Secondary data was obtained from the 2019 American Time Use Survey database. Applying a cross-sectional design, data were analyzed using a linear regression model in SPSS version 27 and PROCESS Macro with Hayes Model 1 and 59. We identified the extent of the conditional indirect moderation effect of sex and the indirect employment status mediation effect moderated by sex in the relationship between PLA-SLA and CLA-ELA by older adult age cohorts. An index of moderated mediation was used to test the significance of each effect. The 80-plus yrs. cohort SLA time use was greater than in PLA across cohorts. Sex moderation showed a stronger effect in men by substantially decreasing their …

Annual journal of the Texas Gulf Historical Society publishing papers about the history of people, events, and development in the Texas Gulf region.

The goal of this thesis is to support the automated identification of accessibility in user reviews or bug reports, to help technology professionals prioritize their handling, and, thus, to create more inclusive apps. Particularly, we propose a model that takes as input accessibility user reviews or bug reports and learns their keyword-based features to make a classification decision, for a given review, on whether it is about accessibility or not. Our empirically driven study follows a mixture of qualitative and quantitative methods. We introduced models that can accurately identify accessibility reviews and bug reports and automate detecting them. Our models can automatically classify app reviews and bug reports as accessibility-related or not so developers can easily detect accessibility issues with their products and improve them to more accessible and inclusive apps utilizing the users' input. Our goal is to create a sustainable change by including a model in the developer's software maintenance pipeline and raising awareness of existing errors that hinder the accessibility of mobile apps, which is a pressing need. In light of our findings from the Blackboard case study, Blackboard and the course material are not easily accessible to deaf students and hard of hearing. Thus, deaf students …