UTSA Libraries and Museums
Permanent URI for this communityhttps://hdl.handle.net/20.500.12588/16
UTSA Libraries and Museums advance research and education, stimulate discovery and creativity, and engage and transform our diverse communities by providing distinctive expertise, high-quality information resources, inspirational spaces, and innovative and responsive services.
Browse
Browsing UTSA Libraries and Museums by Title
Now showing 1 - 20 of 48
- Results Per Page
- Sort Options
Item A General Procedure to Formulate 3D Elements for Finite Element Applications(2023-10-03) Shahriar, Adnan; Majlesi, Arsalan; Montoya, ArturoThis paper presents a general procedure to formulate and implement 3D elements of arbitrary order in meshes with multiple element types. This procedure includes obtaining shape functions and integration quadrature and establishing an approach for checking the generated element’s compatibility with adjacent elements’ surfaces. This procedure was implemented in Matlab, using its symbolic and graphics toolbox, and complied as a GUI interface named ShapeGen3D to provide finite element users with a tool to tailor elements according to their analysis needs. ShapeGen3D also outputs files with the element formulation needed to enable users to implement the generated elements in other programming languages or through user elements in commercial finite element software. Currently, finite element (FE) users are limited to employing element formulation available in the literature, commercial software, or existing element libraries. Thus, the developed procedure implemented in ShapeGen3D offers FEM users the possibility to employ elements beyond those readily available. The procedure was tested by generating the formulation for a brick element, a brick transition element, and higher-order hexahedron and tetrahedron elements that can be used in a spectral finite element analysis. The formulation obtained for the 20-node element was in perfect agreement with the formulation available in the literature. In addition, the results showed that the interpolation condition was met for all the generated elements, which provides confidence in the implementation of the process. Researchers and educators can use this procedure to efficiently develop and illustrate three-dimensional elements.Item A Review of AI-Based Cyber-Attack Detection and Mitigation in Microgrids(2023-11-18) Beg, Omar A.; Khan, Asad Ali; Rehman, Waqas Ur; Hassan, AliIn this paper, the application and future vision of Artificial Intelligence (AI)-based techniques in microgrids are presented from a cyber-security perspective of physical devices and communication networks. The vulnerabilities of microgrids are investigated under a variety of cyber-attacks targeting sensor measurements, control signals, and information sharing. With the inclusion of communication networks and smart metering devices, the attack surface has increased in microgrids, making them vulnerable to various cyber-attacks. The negative impact of such attacks may render the microgrids out-of-service, and the attacks may propagate throughout the network due to the absence of efficient mitigation approaches. AI-based techniques are being employed to tackle such data-driven cyber-attacks due to their exceptional pattern recognition and learning capabilities. AI-based methods for cyber-attack detection and mitigation that address the cyber-attacks in microgrids are summarized. A case study is presented showing the performance of AI-based cyber-attack mitigation in a distributed cooperative control-based AC microgrid. Finally, future potential research directions are provided that include the application of transfer learning and explainable AI techniques to increase the trust of AI-based models in the microgrid domain.Item A Scoping Review on Gender/Sex Differences in COVID-19 Vaccine Intentions and Uptake in the United States(SAGE Publications, 2023-10-17) Sileo, Katelyn M.; Hirani, Inara M.; Luttinen, Rebecca L.; Hayward, Matt; Fleming, Paul J.Objective: To explore the empirical literature on gender/sex differences in vaccine acceptance among U.S.-based adults and adolescents in approximately the first 2 years of the pandemic. Data source: Embase, Medline, PsycINFO, EBSCO, CINAHL, Web of Science Study inclusion and exclusion criteria: Peer-reviewed studies conducted in the U.S. with those aged 12 and older, published in English before January 12, 2022, examining the relationship between gender/sex on COVID-19 vaccine intentions and/or uptake. Data extraction: Three authors screened studies and extracted data. Data Synthesis: Univariate and multivariate results are summarized. Results: A total of 53 studies met inclusion criteria (48 intentions, 7 uptake), using mostly cross-sectional designs (92.5%) and non-random sampling (83.0%). The majority of studies supported men’s greater intentions to vaccinate compared to women, and men’s greater vaccine uptake in univariate analyses, but most multivariate analyses supported no gender differences in uptake. Few studies examined gender beyond binary categories (women/men), highlighting a gap in the studies inclusive of transgender or gender-diverse populations in analyses. Conclusion: Women may have been more hesitant to get the vaccine than men early in the pandemic, but these differences may not translate to actual behavior. Future research should include non-binary/transgender populations, explore the gender-specific reasons for hesitancy and differences by sub-populations, utilize more rigorous designs, and test gender-sensitive public health campaigns to mitigate vaccine concerns.Item Advances in Fractional-Order Neural Networks, Volume II(2023-11-29) Stamova, Ivanka; Stamov, Gani; Li, XiaodiFractional-order neural network models have become an active research subject and have attracted increasing attention in many fields [...]Item Alzheimer’s Amyloid Hypothesis and Antibody Therapy: Melting Glaciers?(2024-03-31) Høilund-Carlsen, Poul F.; Alavi, Abass; Castellani, Rudolph J.; Neve, Rachael L.; Perry, George; Revheim, Mona-Elisabeth; Barrio, Jorge R.The amyloid cascade hypothesis for Alzheimer’s disease is still alive, although heavily challenged. Effective anti-amyloid immunotherapy would confirm the hypothesis’ claim that the protein amyloid-beta is the cause of the disease. Two antibodies, aducanumab and lecanemab, have been approved by the U.S. Food and Drug Administration, while a third, donanemab, is under review. The main argument for the FDA approvals is a presumed therapy-induced removal of cerebral amyloid deposits. Lecanemab and donanemab are also thought to cause some statistical delay in the determination of cognitive decline. However, clinical efficacy that is less than with conventional treatment, selection of amyloid-positive trial patients with non-specific amyloid-PET imaging, and uncertain therapy-induced removal of cerebral amyloids in clinical trials cast doubt on this anti-Alzheimer’s antibody therapy and hence on the amyloid hypothesis, calling for a more thorough investigation of the negative impact of this type of therapy on the brain.Item Alzheimer's Amyloid Hypothesis and Antibody Therapy: Melting Glaciers?(2024-03-31) Høilund-Carlsen, Poul F.; Alavi, Abass; Castellani, Rudolph J.; Neve, Rachael L.; Perry, George; Revheim, Mona-Elisabeth; Barrio, Jorge R.The amyloid cascade hypothesis for Alzheimer’s disease is still alive, although heavily challenged. Effective anti-amyloid immunotherapy would confirm the hypothesis’ claim that the protein amyloid-beta is the cause of the disease. Two antibodies, aducanumab and lecanemab, have been approved by the U.S. Food and Drug Administration, while a third, donanemab, is under review. The main argument for the FDA approvals is a presumed therapy-induced removal of cerebral amyloid deposits. Lecanemab and donanemab are also thought to cause some statistical delay in the determination of cognitive decline. However, clinical efficacy that is less than with conventional treatment, selection of amyloid-positive trial patients with non-specific amyloid-PET imaging, and uncertain therapy-induced removal of cerebral amyloids in clinical trials cast doubt on this anti-Alzheimer’s antibody therapy and hence on the amyloid hypothesis, calling for a more thorough investigation of the negative impact of this type of therapy on the brain.Item An Autochthonous Susceptible Candida auris Clade I Otomycosis Case in Iran(2023-11-11) Ahmadi, Bahram; Naeimi, Behrouz; Ahmadipour, Mohammad Javad; Morovati, Hamid; de Groot, Theun; Spruijtenburg, Bram; Badali, Hamid; Meis, Jacques F.Candida auris is a newly emerging multidrug-resistant fungal pathogen considered to be a serious global health threat. Due to diagnostic challenges, there is no precise estimate for the prevalence rate of this pathogen in Iran. Since 2019, only six culture-proven C. auris cases have been reported from Iran, of which, five belonged to clade V and one to clade I. Herein, we report a case of otomycosis due to C. auris from 2017 in a 78-year-old man with diabetes mellitus type II without an epidemiological link to other cases or travel history. Short tandem repeat genotyping and whole genome sequencing (WGS) analysis revealed that this isolate belonged to clade I of C. auris (South Asian Clade). The WGS single nucleotide polymorphism calling demonstrated that the C. auris isolate from 2017 is not related to a previously reported clade I isolate from Iran. The presence of this retrospectively recognized clade I isolate also suggests an early introduction from other regions or an autochthonous presence. Although the majority of reported C. auris isolates worldwide are resistant to fluconazole and, to a lesser extent, to echinocandins and amphotericin B, the reported clade I isolate from Iran was susceptible to all antifungal drugs.Item An Iterative Procurement Combinatorial Auction Mechanism for the Multi-Item, Multi-Sourcing Supplier-Selection and Order-Allocation Problem under a Flexible Bidding Language and Price-Sensitive Demand(2024-07-17) Abbaas, Omar; Ventura, Jose A.This study addresses the multi-item, multi-sourcing supplier-selection and order-allocation problem. We propose an iterative procurement combinatorial auction mechanism that aims to reveal the suppliers’ minimum acceptable selling prices and assign orders optimally. Suppliers use a flexible bidding language to submit procurement bids. The buyer solves a Mixed Integer Non-linear Programming (MINLP) model to determine the winning bids for the current auction iteration. We introduce a buyer’s profit-improvement factor that constrains the suppliers to reduce their selling prices in subsequent bids. Moreover, this factor enables the buyer to strike a balance between computational effort and optimality gap. We develop a separate MINLP model for updating the suppliers’ bids while satisfying the buyer’s profit-improvement constraint. If none of the suppliers can find a feasible solution, the buyer reduces the profit-improvement factor until a pre-determined threshold is reached. A randomly generated numerical example is used to illustrate the proposed mechanism. In this example, the buyer’s profit improved by as much as 118% compared to a single-round auction. The experimental results show that the proposed mechanism is most effective in competitive environments with several suppliers and comparable costs. These results reinforce the importance of fostering competition and diversification in a supply chain.Item An analysis of bibliometric indicators, National Institutes of Health funding, and faculty size at Association of American Medical Colleges medical schools, 1997–2007(Medical Library Association, 2008-10) Hendrix, DeanObjective: The objective of this study was to analyze bibliometric data from ISI, National Institutes of Health (NIH)–funding data, and faculty size information for Association of American Medical Colleges (AAMC) member schools during 1997 to 2007 to assess research productivity and impact. Methods: This study gathered and synthesized 10 metrics for almost all AAMC medical schools (n = 123): (1) total number of published articles per medical school, (2) total number of citations to published articles per medical school, (3) average number of citations per article, (4) institutional impact indices, (5) institutional percentages of articles with zero citations, (6) annual average number of faculty per medical school, (7) total amount of NIH funding per medical school, (8) average amount of NIH grant money awarded per faculty member, (9) average number of articles per faculty member, and (10) average number of citations per faculty member. Using principal components analysis, the author calculated the relationships between measures, if they existed. Results: Principal components analysis revealed 3 major clusters of variables that accounted for 91% of the total variance: (1) institutional research productivity, (2) research influence or impact, and (3) individual faculty research productivity. Depending on the variables in each cluster, medical school research may be appropriately evaluated in a more nuanced way. Significant correlations exist between extracted factors, indicating an interrelatedness of all variables. Total NIH funding may relate more strongly to the quality of the research than the quantity of the research. The elimination of medical schools with outliers in 1 or more indicators (n = 20) altered the analysis considerably. Conclusions: Though popular, ordinal rankings cannot adequately describe the multidimensional nature of a medical school's research productivity and impact. This study provides statistics that can be used in conjunction with other sound methodologies to provide a more authentic view of a medical school's research. The large variance of the collected data suggests that refining bibliometric data by discipline, peer groups, or journal information may provide a more precise assessment.Item Analysis of the Skin and Brain Transcriptome of Normally Pigmented and Pseudo-Albino Southern Flounder (Paralichthys lethostigma) Juveniles to Study the Molecular Mechanisms of Hypopigmentation and Its Implications for Species Survival in the Natural Environment(2024-07-16) Blandon, Ivonne R.; DiBona, Elizabeth; Battenhouse, Anna; Vargas, Sean; Mace, Christopher; Seemann, FraukeSouthern flounder skin pigmentation is a critical phenotypic characteristic for this species’ survival in the natural environment. Normal pigmentation allows rapid changes of color for concealment to capture prey and UV light protection. In contrast, highly visible hypopigmented pseudo-albinos exhibit a compromised immune system and are vulnerable to predation, sensitive to UV exposure, and likely have poor survival in the wild. Skin and brain tissue samples from normally pigmented and hypopigmented individuals were analyzed with next-generation RNA sequencing. A total of 1,589,613 transcripts were used to identify 952,825 genes to assemble a de novo transcriptome, with 99.43% of genes mapped to the assembly. Differential gene expression and gene enrichment analysis of contrasting tissues and phenotypes revealed that pseudo-albino individuals appeared more susceptible to environmental stress, UV light exposure, hypoxia, and osmotic stress. The pseudo-albinos’ restricted immune response showed upregulated genes linked to cancer development, signaling and response, skin tissue formation, regeneration, and healing. The data indicate that a modified skin collagen structure likely affects melanocyte differentiation and distribution, generating the pseudo-albino phenotype. In addition, the comparison of the brain transcriptome revealed changes in myelination and melanocyte stem cell activity, which may indicate modified brain function, reduced melanocyte migration, and impaired vision.Item Biophysical Breakthroughs Projected for the Phage Therapy of Bacterial Disease(2024-04-12) Chambers, James P.; Aldis, Miranda; Thomas, Julie A.; Gonzales, Cara B.; White, Richard Allen; Serwer, PhilipPast anti-bacterial use of bacteriophages (phage therapy) is already well reviewed as a potential therapeutic response to the emergence of multidrug-resistant, pathogenic bacteria. Phage therapy has been limited by the following. (1) The success rate is too low for routine use and Food and Drug Administration (FDA) approval. (2) Current strategies of routine phage characterization do not sufficiently improve the success rate of phage therapy. (3) The stability of many phages at ambient temperature is not high enough to routinely store and transport phages at ambient temperature. In the present communication, we present new and previous data that we interpret as introductory to biophysically and efficiently transforming phage therapy to the needed level of effectiveness. Included are (1) procedure and preliminary data for the use of native gel electrophoresis (a low-cost procedure) for projecting the therapy effectiveness of a newly isolated phage, (2) data that suggest a way to achieve stabilizing of dried, ambient-temperature phages via polymer embedding, and (3) data that suggest means to increase the blood persistence, and therefore the therapy effectiveness, of what would otherwise be a relatively low-persistence phage.Item Board Exam Test Prep: A Survey of SCAMeL Library Resources(2017-10) Johnson, Emily; Amen, BrookPurpose: The purpose of this survey is to evaluate what board exam question banks, if any, SCAMeL member libraries subscribe to and if these resources are being utilized by their campuses. Participants: Participants were members of the SCAMeL collection development group. SCAMeL consists of 17 academic health science libraries in the South Central region. We requested that one representative from each institution respond to the survey. Methodology: SCAMeL library collection development representatives were emailed a link to the survey on June 7, 2017. The survey consisted of 16 multiple choice and free text questions and was created using Qualtrics. The survey remained active until 5:00 PM CST on June 30, 2017.Item Cambridge Structural Database (WebCSD)(Issues in Science & Technology Librarianship, 2019-08-20) Hayward, MattItem Centralized versus Decentralized Cleanup of River Water Pollution: An Application to the Ganges(2023-10-07) Batabyal, Amitrajeet A.; Beladi, HamidWe exploit the public good attributes of Ganges water pollution cleanup and theoretically analyze an aggregate economy of two cities—Kanpur and Varanasi—through which the Ganges flows. Our specific objective is to study whether water pollution cleanup in these two cities ought to be provided in a centralized or in a decentralized manner. We first determine the efficient cleanup amounts that maximize the aggregate surplus from making the Ganges cleaner in the two cities. Second, we compute the optimal amount of water pollution cleanup in the two cities in a decentralized regime in which spending on cleanup is financed by a uniform tax on the city residents. Third, we ascertain the optimal amount of water pollution cleanup in the two cities in a centralized regime subject to equal provision of cleanup and cost sharing. Fourth, we show that if the two cities have the same preference for pollution cleanup, then centralization is preferable to decentralization as long as there is a spillover from pollution cleanup. Finally, we show that if the two cities have dissimilar preferences for pollution cleanup, then centralization is preferable to decentralization as long as the spillover exceeds a certain threshold.Item Come together: Engaging campus partners to respond to OER and textbook legislation in Texas(2022-10) Louis, Lisa; Davis, Sabrina; Ivie, DeeAnnNumerous pieces of legislation around textbooks, OER, and inclusive access have been passed across the United States the past few years. In Texas, SB 810-focused on transparency around OER-was passed in 2017. In 2021, Texas passed HB 1027, mandating transparency around inclusive access programs. In this panel discussion Texas Digital Library OER Ambassadors will share experiences working with their respective campus partners to implement practical and innovative solutions in response to this legislation. This panel will have a special focus on the innovative sleuthing and problem-solving necessary to craft frameworks supporting these mandates. Librarians will also shed light on the practical mechanics necessary for setting textbook legislation into motion at Texas institutions, including ensuring representation of critical players on system-wide and institutional task forces and highlighting virtues of the legislation in conversations with campus partners. The Texas Digital Library (TDL) is a collaborative consortium based in Texas and rooted in higher education. Texas Digital Library builds capacity among its membership for ensuring equitable access to and preservation of digital content of value to research, instruction, cultural heritage, and institutional memory. In 2020, TDL expanded its services to include support for Open Educational Resources (OER). Charged with developing a Community of Practice, TDL's OER Ambassador program provides a forum for member libraries to discuss and share challenges and achievements around OER initiatives that impact student success, retention, graduation rates, and the cost of higher education for college students in Texas. By attending this session, attendees will be able to: 1. Create a game-plan to support cross-campus collaboration in support of legislative mandates around OER and textbooks 2. Leverage OER and textbook legislation to help improve the campus experience for students 3. Connect with campus partners to navigate complex technological and infrastructure challenges posed by legislative mandates around OER and textbooksItem Differential Reinforcement without Extinction: An Assessment of Sensitivity to and Effects of Reinforcer Parameter Manipulations(2024-06-28) MacNaul, Hannah; Cividini-Motta, Catia; Randall, KaylaAlthough functional communication training (FCT) usually includes extinction, withholding reinforcement is not possible or ethical with certain individuals, for some topographies of problem behavior, or in certain contexts. The current study evaluates the effects of two variations of FCT, both without extinction, on problem behavior and communication. Further, the intervention procedures were designed to evaluate participant reactivity to reinforcer parameters (e.g., magnitude, delay, and quality) in the context of the FCT variations. The parameter sensitivity assessments were effective at identifying relevant reinforcer parameters for each participant and both FCT interventions were effective in decreasing problem behavior and increasing communication for all participants. The results demonstrated that FCT was effective regardless of which reinforcer parameter was manipulated. Moreover, all sessions were conducted in participants’ homes and caregivers reported high degrees of social validity for the intervention procedures and outcomes.Item Episode 1: Preserving the ITC's treasured collections(University Office of Strategic Communications, 2024-05-23) Elizondo, John; Perales, MonicaThe ITC's history in San Antonio runs deep -- in fact, many of us have vivid childhood memories exploring the facility and exhibits from our K-12 school years. In the series opener, Monica Perales, ITC associate vice provost, will discuss the role the museum plays in collecting, preserving and sharing the state's diverse cultural history. Take a peek at what's in store for the museum as it prepares to move to its new temporary space in Frost Tower, located in the heart of San Antonio.Item Episode 2: The role of Tier One museums and libraries(University Office of Strategic Communications, 2024-05-28) Elizondo, John; Hendrix, DeanHow do great museums and libraries support great cities and research universities? Explore this and other topics with Dean Hendrix, vice provost of the UTSA Libraries and University Librarian. Listen as Hendrix describes the relationship between the ITC and UTSA, shares the many opportunities that academic libraries and museums offer their communities, and imagines the potential of the ITC to reach learners of all ages in Texas and beyond.Item Episode 3: Building a world-class museum for San Antonio(University Office of Strategic Communication, 2024-05-30) Elizondo, John; Shipley, HeatherHow can the ITC attract world-class exhibits to San Antonio? How can it inspire the next generation of storytellers? Join ITC: Museum of the Future as UTSA Provost and Executive Vice President for Academic Affairs Heather Shipley explores the benefits of building an American Alliance of Museums-accredited museum in San Antonio.Item Fast-Responding Pressure-Sensitive Paint Measurements of the IC3X at Mach 7.2(2023-10-18) Delgado Elizondo, Valeria; Dhanagopal, Abinayaa; Combs, Christopher S.Global surface pressure measurements of a 5.7% scale AFRL Initial Concept 3.X vehicle (IC3X) were obtained using a fast-responding ruthenium-based pressure-sensitive paint (PSP) at the UTSA Mach 7 Ludwieg Tube Wind Tunnel at two different angles of attack, 0° and 2.5°. Static calibration of the paint was performed over a range of 0.386 kPa to 82.7 kPa to relate luminescent intensity to pressure. Details on the facility, paint preparation, application, calibration, and image processing techniques are provided in the manuscript. The results from statistical, spectral, and proper orthogonal decomposition (POD) analyses are presented to characterize the pressure field observed on the model. The experimental results qualitatively follow the expected trends and correspond to the occurrence of shock waves and expansion fans, which were visualized via Schlieren imaging. The theoretical pressure range obtained from conical shock analysis for 0° agrees with the experimentally derived pressure range for the model, and the outliers are attributed to errors in image registration. This study presents preliminary pressure measurements that pave the way for obtaining time-resolved global PSP measurements to train and validate aerothermodynamic machine learning models.
- «
- 1 (current)
- 2
- 3
- »