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Introduction to \u3cem\u3eTotality: Abstraction and Meaning in the Art of Barnett Newman\u3c/em\u3e
Get PDFMechanisms for Regional Dolomitization of the Triassic Yangtze Platform, Guanling Area, in the Nanpanjiang Basin of South China
No full textLower to Middle Triassic strata of the Yangtze Platform contain a dolomitized interior, undolomitized boundstone margin, and partially dolomitized slope facies. Anhedral to subhedral dolomite replaces micrite, carbonate grains, and intergranular sparry calcite. Coarse euhedral dolomite cement lines depositional cavities. Vugs and early fractures contain saddle dolomite, while later fractures are filled with calcite. Stylolites crosscut most fractures and all dolomite phases.
Burial history predicts a maximum temperature of 180°C at 5 km depth at the base of the platform and a maximum temperature of 96°C at 2.2 km depth at the top of the platform, using regional stratal thickness in conjunction with a thermal gradient of 30°C/km.
Stable isotope measurements within dolomite show δ18O values ranging from -7.7‰ to 0.8‰ (VPDB) and δ13C values ranging from 0.77‰ to 4.0‰ (VPDB). Vein calcite isotope values range from δ18O -18.4‰ to -5.2‰ and δ13C -6.1 to 3.4‰. 87Sr/86Sr ratios from 11 of 14 dolomite samples showed values ranging from 0.707677 to 0.708601, consistent with Triassic seawater, while 2 samples showed elevated 87Sr/86Sr values, and 1 sample showed depleted 87Sr/86Sr values.
Average homogenization temperatures (Th) and freezing point depressions (Tmice) from 35 euhedral dolomite crystals in the platform interior, slope, and basin indicate entrapment of saline brines (9.5 to 15 wt. % NaCl) over temperatures of 113-150°C.
87Sr/86Sr ratios of dolomite are consistent with modified seawater including radiogenic contribution of hydrothermal fluids. The range in δ18O within dolomite is consistent with enrichment by evaporative concentration of seawater, but also includes negative values consistent with high temperature fluids.
The spatial distribution of dolomite indicates that early marine cementation of the margin prevented permeation of dolomitizing fluids. Hypersaline reflux dolomitization remains a possibility for platform interior, but the partial dolomitization of the slope and basin pelagic carbonates and geothermometry are more consistent with late hydrothermal dolomitization. The late diagenetic stage, presence of saddle dolomite, and geothermometry from over 90 to 185°C point to burial dolomitization
SA Structure: A Magazine Prototype and Creative Project
No full textSA Structure is a printed architecture magazine composed of five articles exploring the architectural landscape of San Antonio, Texas. The publication explores various historic districts within the city, profiles some of the most influential figures in the local architecture industry, and visualizes San Antonio’s unique spatial taste to spotlight its architectural richness. The purpose of this project is to display both the physical architecture of the city and the art of architecture by creating a printed magazine issue that reflects the same beauty of design in the form of printed communication. This project seeks to visualize the significance of architectural design in shaping the identity of a city– while simultaneously illustrating the power of the printed medium
Book and Tablet Team (B.A.T.T.) Final Project Report
Get PDFThe Book and Tablet Team (B.A.T.T.) looks to design a device that simplifies reading from a tablet to assist those with dexterity issues in their hands and arms. The team’s main objectives for this project are to design a device that may be used in a functional and useful fashion, construct said device, and finally test the device. This report will consist of an overview of our device and its five subsystems and an evaluation of the final design with respect to the project requirements. The five main subsystems are as follows: the mount, the stand, the tablet holder, the remote controller, and the page turner. The mount, stand, and holder focus on making sure the tablet is in the ideal reading position. These systems only contain mechanical components. Alternatively, the controller and the page turner incorporate electromechanical systems that focus on the actual turning of the page on the tablet.
The design constraints for this project were to protect the safety of the target audience and to stay within the budget provided for the team. The safety of the target audience was addressed by creating three main safety requirements, while also focusing attention on safety applications when considering design changes. The safety requirements look to prevent the following: pinch hazards, sharp edges, and possible falling components. By creating preventive design solutions for these requirements, the team was able to successfully meet the user safety constraint.
The B.A.T.T. team fulfilled all the specific functional and non-functional requirements for their project except for the tablet rigidity requirement. The functional requirements include making the device easily movable, having an adjustable height for optimal reading in various positions, accommodating most tablet reading devices, and allowing page switching with minimal error. Non-functional requirements were also considered to enhance the user experience and make the device safe for the target audience. Tablet size and weight were considered to make the device applicable to more users. The interface of the device and the tablet was also considered by having requirements to keep the tablet in a rigid position, make sure it was not damaged, and the eBook is not blocked by the device. Safety measures were also taken to protect potentially injury-prone users, such as minimizing sharp edges, reducing pinch risks, and installing safety catches for moving components.
The prototype for the tablet holder can perform most of the tasks outlined in the project plan but falls short of meeting one requirement for holding tablets in a rigid position due to the springs being too large for the smallest tablet size. The design team has identified potential solutions to address this design flaw and may need to modify the holder and conduct further testing to ensure all requirements are met. A temporary solution is to mount eh smaller tablet size in a vertical position, where the width of the smallest tablet is the height. For a more permanent solution, the team looks to implement a spring stopper to prevent the springs from losing rigidity, providing more tension. Overall, the prototype is functional and can accommodate a variety of tablet sizes while allowing users to turn pages without physical contact with the device
Chicana Portraits: Critical Biographies of Twelve Chicana Writers
No full textThis innovative collection pairs portraits with critical biographies of twelve key Chicana writers, offering an engaging look at their work, contributions to the field, and major achievements.Artist Raquel Valle-Sentíes’s portraits bring visual dimension, while essays delve deeply into the authors’ lives for details that inform their literary, artistic, feminist, and political trajectories and sensibilities. The collection brilliantly intersects artistic visual and literary cultural productions, allowing complex themes to emerge, such as the fragility of life, sexism and misogyny, Chicana agency and forging one’s own path, the struggles of becoming a writer and battling self-doubt, economic instability, and political engagement and activism.Arranged chronologically by birth order of the authors, the book can be read cover to cover for a genealogical overview, or scholars and general readers can easily jump in at any point and read about an individual author, regardless of the chronology.Biographies included in this work include Raquel Valle-Sentíes, Angela de Hoyos, Montserrat Fontes, Gloria E. Anzaldúa, Norma E. Cantú, Denise Elia Chávez, Carmen Tafolla, Cherríe Moraga, Ana Castillo, Lorna Dee Cervantes, Sandra Cisneros, and Demetria Martínez.https://digitalcommons.trinity.edu/mono/1196/thumbnail.jp
KMeans and NMFk Clustering for Analyzing Lipid Domain Formation with the Appearance of Amyloidogenic Proteins
No full textThe phenomenon of phase separation in mixed lipid systems is one of significant biological importance in cell membrane construction and has been extensively studied both experimentally and theoretically. Understanding the behavior of the phase-separated lipid nanodomains through simulation data can help researchers better understand the mechanisms of these lipid phases/domains, which can in turn provide a useful approach to study membrane damage through lipid phases disruptions, and ultimately, guide potential drug development associated with membrane-targeted diseases, such as the pathogenesis of Alzheimer\u27s. In this project, we tested two unsupervised learning algorithms to determine lipid phases: Non-negative Matrix Factorization (NMFk) and a customized form of KMeans. We then compared these learning algorithms with a brute-force neighbor-searching method. The results of lipid phase classification from these three different methods are compared and contrasted by measuring the thickness and area-per-lipid of those groups. The project provides three different pipelines to study the evolution of lipid phases and segregation, and characterizes the membrane damage induced by the appearance of amyloidogenic proteins
Investigating Behavioral Patterns in Birds with Wing Weaponry and Skeletal Weaponization in Two Zenaida Doves
Get PDFThe white-winged dove and the mourning dove are two closely related North American Columbid species that display aggressive wing-slapping behavior. This behavior, observed in several avian families, is sometimes accompanied by weaponizing osteological modifications to the carpometacarpus bone. I hypothesized the existence of such weapons in white-winged and mourning doves due to their common use of wing-slapping. To explore this hypothesis, I made two predictions based on patterns of modification in birds with well documented weaponry. I predicted that, if weaponry exists in these birds, 1) white-winged doves will show greater weaponization than mourning doves, and 2) males of each species will show greater weaponization than females. To test these predictions, I collected wing bones from 38 doves and analyzed 19 linear measures of each wing. There was no significant difference in bone size or shape between species, and no significant sexual dimorphism in mourning doves. However, in white-winged doves, there was significant sexual dimorphism in the height of the carpometacarpal extensor process, a feature that is commonly modified in weapon-bearing birds. This finding is consistent with the hypothesis that white-winged doves possess weaponizing bone modifications. Possibilities for further study of possible weaponry in white-winged doves are explored
Passive Education, Passive Users: A Research-Informed Elementary Curriculum for Media Literacy, Surveillance, and Technology Engagement
Get PDFWhile media scholars have established that media literacy is imperative to strengthen media’s positive effects and limit its negative effects, elementary-aged children continue to be underserved in current and relevant media literacy education. To address this disparity, this thesis created an age-appropriate media literacy curriculum for children aged seven to nine, bolstered by a comprehensive review of the current literature, which was then taught to a second-grade class at a San Antonio charter school. Results found that students’ current knowledge of contemporary media literacy concepts is minimal, but students made significant improvements through implementation of the proposed curriculum. This project offers a glimpse of the potential advancements that could be made through an updated media literacy education as well as the cognitive capabilities of the examined age group
Archival Search for X-ray Emission From Type Ib/c Supernovae
Get PDFWe present results from an ongoing archival search for X-ray emission from all known Type Ib/c supernovae using data from the Chandra X-ray Observatory. For each supernova, we search all possible observations to find those with coverage in X-rays. For those observations with coverage of a supernova, we extract an X-ray spectrum at the location of the supernova and create response files. We model those spectra with an absorbed hot plasma model in order to determine luminosities or set upper limits. These results are then used to determine or set limits on the mass-loss history of the pre-supernova stars, thus giving insight into the late stages of stellar evolution
MMS Observations of Dayside Warm (Several eV to 100 eV) Ions in the Middle and Outer Magnetosphere
No full textWarm (several eV to 100 eV) ions are an important, and still poorly understood, component of the magnetospheric plasma environment. We present the first comprehensive statistical analysis of several distinct populations of warm ions in the dayside middle and outer magnetosphere. We analyze 7 months (1 September 2015–31 March 2016) of Magnetospheric Multiscale Hot Plasma Composition Analyzer data comprising 734,200 moments (density, temperature) and energy-dependent pitch angle distributions (PADs) of three major ion species (H+, He+, and O+) with energy ≤100 eV. PADs are represented by an energy-averaged index that characterizes the shape of the PAD as field-aligned (FA), pancake, or isotropic. We use filtering by temperature, pitch angle, and concentration to distinguish different populations, and obtain new and more complete information about average density, temperature, PADs, and composition. Our analysis explores two known populations of warm ions: the warm plasmasphere (WPS) and the warm cloak/trough (C/T). The WPS is a higher-temperature, higher-L extension of the duskside plasmaspheric bulge, containing mostly trapped (pancake/isotropic) ions with an H+:He+:O+ order of ion dominance. The C/T contains mostly FA warm ions with a dawnward (duskward) temperature gradient for H+ (He+ and O+), lower densities, and an H+:O+:He+ order of ion dominance. The WPS-C/T overlap contains a mixture of the two populations (e.g., FA He+ in WPS, trapped O+ in C/T). Pancake (FA) PADs are correlated with higher (lower) density/temperature. Our analysis also identifies warm ions in the low-energy plasma sheet. Our work consolidates and systematically extends the characterizations of warm ions reported in previous studies