Digital Commons Network^™

An Investigation Of Motor Speech And Motor Limb Movements Following A Sport-Related Concussion-An Extension Study, Linda Phan

Open Access Theses & Dissertations

Background: Minimal research is available regarding the effects on motor speech and motor limb movements following a sport-related concussion (SRC). A sensitive measure is necessary to detect subtle deficits in motor speech, as it may provide diagnostic insight involving return-to- play decisions.

Purpose: This research aimed at replicating and extending a previous research study, Hewitt (2015), conducted at the University of Texas at El Paso. The Hewitt (2015) study examined motor speech tasks and motor limb tasks which included the following: oral diadochokinetics (DDK): sequential motion rate (SMR)(i.e. /puh-tuh-kuh/) and alternating motion rate (AMR) (i.e. /puhpuhpuh/, /tuhtuhtuh/, /kuhkuhkuh/); speech rate …

Geology, Geochemistry, And 3d Geological Modelling Of The Independencia - Los Bancos Ag-Au Epithermal Vein Systems In The Palmarejo District, Chihuahua, Mexico, Arturo Ramirez

Open Access Theses & Dissertations

The Sierra Madre Occidental (SMO) is a Cretaceous-Tertiary silicic ignimbrite province in northwestern Mexico. It is the result of tectonic and magmatic events produced by the subduction of the Farallon plate under North America (80-40 Ma) and the opening of the Gulf of California (14-12 Ma), thus forming the SMO metallogenic provinces. The Late Eocene to Oligocene was a major period of metallic mineralization hosting various deposit types, principally Ag-Au (±Pb-Zn-Cu) epithermal veins, which have been economically significant.

The study area lies in the Palmarejo district, operated by Coeur Mining Inc., which was the worldâ??s fifth largest silver producer in …

Design And Evaluation Of The Impact Of A Multi-Agent Control System (Framework) Applied To A Social Setting, Perez Antonio Perez

Open Access Theses & Dissertations

The objective of this research is to design and analyze the performance of a new mechanism to improve the advising of students in a nontraditional environment. This nontraditional environment includes: a minority serving, commuter campus with a high percentage of transfer students. Specifically, these demographics are unable to keep a tightly controlled cohort of students flowing through to the completion of the curriculum. Students in these circumstances usually have varied course loads and competing priorities due to family and financial needs or other societal responsibilities. Therefore, there is a need for an individualized approach to advising.

University administrations face challenges …

Examining The Role Of Threat Processing In Memory Consolidation And Prejudice Formation, Stephanie Marie Reyes

Open Access Theses & Dissertations

Memory is a flexible system that integrates new incoming information into existing memory representations (Stickgold & Walker, 2007). Through sleep and over time, memories become stable via consolidation processes (Payne, Stickgold, Swanberg & Kensinger, 2008). Prejudice formation can occur through the consolidation of stereotype schemas. In a previous study Latino participants learned positive and negative trait information about in-group and out-group members (Enge, Lupo & Zárate, 2015). At test, participants responded more quickly to out-group targets paired with negative traits than in-group pairings with these traits. Findings indicate that participants also responded more quickly to in-group targets paired with positive …

A Semantically-Enabled Trust Model For Collaborative Environments, Joaquin Andres Reyna

Open Access Theses & Dissertations

The World Wide Web has revolutionized the way we find, exchange, reuse and integrate information at a rate inconceivable only a generation ago; but for all its perks it has one big weakness: trusting that the information retrieved is accurate. Web technologies and applications allows anyone to share information. This work aims to assist humans (and eventually autonomous agents) in the task of trusting Web resources, a very important step when reusing information found on the Web. In this research, we propose a new algorithm to tackle the challenge of assigning trust to Web resources. Our algorithm is inspired on …

Synthesis Of Neoglycoproteins/Neoglycopeptides And Their Immunological Evaluation In The Context Of Chagas Disease, Nathaniel Scott Schocker

Open Access Theses & Dissertations

The protozoan parasite, Trypanosoma cruzi, the etiologic agent of Chagas disease (ChD), has a cell surface covered by immunogenic glycoconjugates. A synthetic glycoarray containing non-reducing α-galactopyranosyl moieties related to mucin O-glycans of the parasite T. cruzi was evaluated by a chemiluminescent enzyme-linked immunosorbent assay (CL-ELISA) with sera from patients with chronic ChD, revealing the disaccharide Galα(1,3)Galβ as the immunodominant glycotope (Chapter 2). This disaccharide comprises the two terminal sugars of the known immunodominant glycotope Galα(1,3)Galβ(1,4)GlcNAcα, which is expressed on glycosylphosphatidylinositol-anchored mucins of the infective trypomastigote stage of T. cruzi and triggers high levels of protective anti-α-Gal antibodies (Abs) in infected …

Co2 And Fire Influence Tropical Ecosystem Stability In Response To Climate Change, Timothy M. Shanahan, Konrad A. Hughen, Nicholas P. Mckay, Jonathan T. Overpeck, Christopher A. Scholz, William D. Gosling, Charlotte S. Miller, John S. Peck, John W. King, Clifford W. Heil

Graduate School of Oceanography Faculty Publications

Interactions between climate, fire and CO₂ are believed to play a crucial role in controlling the distributions of tropical woodlands and savannas, but our understanding of these processes is limited by the paucity of data from undisturbed tropical ecosystems. Here we use a 28,000-year integrated record of vegetation, climate and fire from West Africa to examine the role of these interactions on tropical ecosystem stability. We find that increased aridity between 28–15 kyr B.P. led to the widespread expansion of tropical grasslands, but that frequent fires and low CO₂ played a crucial role in stabilizing these ecosystems, even …

Estimating The Recharge Properties Of The Deep Ocean Using Noble Gases And Helium Isotopes, Brice Loose, William J. Jenkins, Roisin Moriarty, Peter Brown, Loic Jullion, Alberto C. Naveiro Garabato, Sinhue Torres Valdes, Mario Hoppema, Chris Ballentine, Michael P. Meredith

Graduate School of Oceanography Faculty Publications

The distribution of noble gases and helium isotopes in the dense shelf waters of Antarctica reflects the boundary conditions near the ocean surface: air‐sea exchange, sea ice formation, and subsurface ice melt. We use a nonlinear least squares solution to determine the value of the recharge temperature and salinity, as well as the excess air injection and glacial meltwater content throughout the water column and in the precursor to Antarctic Bottom Water. The noble gas‐derived recharge temperature and salinity in the Weddell Gyre are −1.95°C and 34.95 psu near 5500 m; these cold, salty recharge values are a result of …

Relationship Of Bacterial Richness To Organic Degradation Rate And Sediment Age In Subseafloor Sediment, Emily A. Walsh, John B. Kirkpatrick, Robert Pockalny, Justine Sauvage, Arthur J. Spivack, Richard W. Murray, Mitchell L. Sogin, Steven D'Hondt

Graduate School of Oceanography Faculty Publications

Subseafloor sediment hosts a large, taxonomically rich, and metabolically diverse microbial ecosystem. However, the factors that control microbial diversity in subseafloor sediment have rarely been explored. Here, we show that bacterial richness varies with organic degradation rate and sediment age. At three open-ocean sites (in the Bering Sea and equatorial Pacific) and one continental margin site (Indian Ocean), richness decreases exponentially with increasing sediment depth. The rate of decrease in richness with increasing depth varies from site to site. The vertical succession of predominant terminal electron acceptors correlates with abundance-weighted community composition but does not drive the vertical decrease in …

Metagenomic Signatures Of Bacterial Adaptation To Life In The Phyllosphere Of A Salt-Secreting Desert Tree, Omri M. Finkel, Tom O. Delmont, Anton F. Post, Shimshon Belkin

Graduate School of Oceanography Faculty Publications

The leaves of Tamarix aphylla, a globally distributed, salt-secreting desert tree, are dotted with alkaline droplets of high salinity. To successfully inhabit these organic carbon-rich droplets, bacteria need to be adapted to multiple stress factors, including high salinity, high alkalinity, high UV radiation, and periodic desiccation. To identify genes that are important for survival in this harsh habitat, microbial community DNA was extracted from the leaf surfaces of 10 Tamarix aphylla trees along a 350-km longitudinal gradient. Shotgun metagenomic sequencing, contig assembly, and binning yielded 17 genome bins, six of which were >80% complete. These genomic bins, representing three phyla …

Environmental Change Explains Cichlid Adaptive Radiation At Lake Malawi Over The Past 1.2 Million Years, Sarah J. Ivory, Margaret W. Blome, John W. King, Michael M. Mcglue, Julia E. Cole, Andrew S. Cohen

Graduate School of Oceanography Faculty Publications

Long paleoecological records are critical for understanding evolutionary responses to environmental forcing and unparalleled tools for elucidating the mechanisms that lead to the development of regions of high biodiversity. We use a 1.2-My record from Lake Malawi, a textbook example of biological diversification, to document how climate and tectonics have driven ecosystem and evolutionary dynamics. Before ∼800 ka, Lake Malawi was much shallower than today, with higher frequency but much lower amplitude water-level and oxygenation changes. Since ∼800 ka, the lake has experienced much larger environmental fluctuations, best explained by a punctuated, tectonically driven rise in its outlet location and …

Atmosphere‐Ocean Linkages In The Eastern Equatorial Pacific Over The Early Pleistocene, Patricia Povea, Isabel Cacho, Ana Moreno, Leopoldo D. Pena, Melisa Menéndez, Eva Calvo, Miquel Canals, Rebecca S. Robinson, Fernando J. Méndez, Jose-Abel Flores

Graduate School of Oceanography Faculty Publications

Here we present a new set of high‐resolution early Pleistocene records from the eastern equatorial Pacific (EEP). Sediment composition from Ocean Drilling Program Sites 1240 and 1238 is used to reconstruct past changes in the atmosphere‐ocean system. Particularly remarkable is the presence of laminated diatom oozes (LDOs) during glacial periods between 1.85 and 2.25 Ma coinciding with high fluxes of opal and total organic carbon. Relatively low lithic particles (coarse and poorly sorted) and iron fluxes during these glacial periods indicate that the increased diatom productivity did not result from dust‐stimulated fertilization events. We argue that glacial fertilization occurred through …

The Fina Nagu Volcanic Complex: Unusual Submarine Arc Volcanism In The Rapidly Deforming Southern Mariana Margin, Maryjo Brounce, Katherine A. Kelley, Robert Stern, Fernando Martinez, Elizabeth Cottrell

Graduate School of Oceanography Faculty Publications

In the Mariana convergent margin, large arc volcanoes disappear south of Guam even though the Pacific plate continues to subduct and instead, small cones scatter on the seafloor. These small cones could form either due to decompression melting accompanying back‐arc extension or flux melting, as expected for arc volcanoes, or as a result of both processes. Here, we report the major, trace, and volatile element compositions, as well as the oxidation state of Fe, in recently dredged, fresh pillow lavas from the Fina Nagu volcanic chain, an unusual alignment of small, closely spaced submarine calderas and cones southwest of Guam. …

Fossil Dna Persistence And Decay In Marine Sediment Over Hundred-Thousand-Year To Million-Year Time Scales, John B. Kirkpatrick, Emily A. Walsh, Steven D'Hondt

Graduate School of Oceanography Faculty Publications

DNA in marine sediment contains both fossil sequences and sequences from organisms that live in the sediment. The demarcation between these two pools and their respective rates of turnover are generally unknown. We address these issues by comparing the total extractable DNA pool to the fraction of sequenced chloroplast DNA (cpDNA) in sediment from two sites in the Bering Sea. We assume that cpDNA is a tracer of non-reproducing fossil DNA. Given >150,000 sequence reads per sample, cpDNA is easily detectable in the shallowest samples but decays with depth, suggesting that sequencing-based richness assessments of communities in deep subseafloor sediment …

Front Matter

Intercultural Human Rights Law Review

Front Matter includes Masthead, advisors, and Table of Contents for the Intercultural Human Rights Law Review Volume 11 (2016).

From Rio To Paris: What Is Left Of The 1992 Declaration On Environment And Development, Francesca Francioni

Intercultural Human Rights Law Review

This paper has a dubitative title. And this is for a good reason. It is meant to introduce the critical perspective in which I propose to assess the legacy of the 1992 Rio Declaration after almost a quarter of a century from its adoption. This retrospective outlook, it is hoped, may help assess the progress, if any, that international law has made in this field, at a time when we are facing the challenge of implementing the 2015 Paris agreement on climate change.

Securing Workers' Economic Rights Through Public Protest, Stephen A. Plass

Intercultural Human Rights Law Review

This essay will explore the use of public protest as a nonregulatory device for promoting the fair pay and equal workplace treatment principles of the Universal Declaration of Human Rights (UDHR), the International Covenant on Economic, Social and Cultural Rights (ICESCR), and American domestic laws. Specifically, it will consider the role of public protest in improving the economic condition of workers who face discrimination, low wages, and "gig" or contractual work arrangements that do not provide the kinds of job security contemplated by the law. The essay will first look at the effect of civil rights protests on the economic …

Mean Antarctic Circumpolar Current Transport Measured In Drake Passage, Kathleen A. Donohue, K. L. Tracey, D. Randolph Watts, M. P. Chidichimo, T. K. Chereskin

Graduate School of Oceanography Faculty Publications

The Antarctic Circumpolar Current is an important component of the global climate system connecting the major ocean basins as it flows eastward around Antarctica, yet due to the paucity of data, it remains unclear how much water is transported by the current. Between 2007 and 2011 flow through Drake Passage was continuously monitored with a line of moored instrumentation with unprecedented horizontal and temporal resolution. Annual mean near-bottom currents are remarkably stable from year to year. The mean depth-independent or barotropic transport, determined from the near-bottom current meter records, was 45.6 sverdrup (Sv) with an uncertainty of 8.9 Sv. Summing …

Low-Loss Single-Mode Hollow-Core Fiber With Anisotropic Anti-Resonant Elements, Md. Selim Habib, Ole Bang, Morten Bache

Electrical Engineering and Computer Science Faculty Publications

A hollow-core fiber using anisotropic anti-resonant tubes in the cladding is proposed for low loss and effectively single-mode guidance. We show that the loss performance and higher-order mode suppression is significantly improved by using symmetrically distributed anisotropic antiresonant tubes in the cladding, elongated in the radial direction, when compared to using isotropic, i.e. circular, anti-resonant tubes. The effective single-mode guidance of the proposed fiber is achieved by enhancing the coupling between the cladding modes and higher-order-core modes by suitably engineering the anisotropic anti-resonant elements. With a silica-based fiber design aimed at 1.06 μm, we show that the loss extinction ratio …

Hybrid Surface Phononic Waveguide Using Hyperbolic Boron Nitride, Yuancheng Xu, Navaneeth Premkumar, Yuchen Yang, Brian A. Lail

Electrical Engineering and Computer Science Faculty Publications

Sub-diffraction limited waveguides have been studied as a means to manipulate light into nanoscale regions. Hybrid waveguides are popular candidates in optical regimes for subwavelength confinement and long range propagation. However, advances in the mid-IR are lacking due to high propagation losses and limited confinement. Here we present the first analysis of hybrid phononic waveguide using a hyperbolic material h-BN to generate surface phonon polaritons. The strong coupling between the photonic cylinder and phononic surface enhances the confined field up to 10-3 λo2 (λo is free-space wavelength) and enables propagation distances up to 100 λo. Our work is fully compatible …

Analysis Of The Fm Radio Spectrum For Secondary Licensing Of Low-Power Short-Range Cognitive Internet Of Things Devices, Derek T. Otermat, Ivica Kostanic, Carlos E. Otero

Electrical Engineering and Computer Science Faculty Publications

The analysis presented in this paper indicates that the FM radio spectrum is underutilized in the areas of the continental United States that have a population of 100000 or less. These locations have vacant FM radio spectrum of at least 13 MHz with sufficient spectrum spacing between adjacent FM radio channels. The spectrum spacing provides the required bandwidth for data transmission and provides enough bandwidth to minimize interference introduced by neighboring predicted and unpredicted FM radio stations and other low-power short-range Internet of Thing (IoT) devices. To ensure that low-power short-range IoT devices maintain reliable communications vacant radio spectrum, such …

Design Of A Thermal Management System For An Oxy-Methane Direct Power Extraction Combustor, Jad Gerges Aboud

Open Access Theses & Dissertations

The overarching goal of this Thesis is to present the design of a thermal management system for an oxy-methane direct power extraction combustor. The design is initiated by performing a 2D analysis on the combustor geometry and then using these results in a 3D model. This is done by using results for heat transfer coefficient and temperatures found from the 2D simulation and importing these to the 3D model. The approach used here couples the combustion process, heat transfer through the chamber wall, and fluid flow behaviors in order to observe the thermal characteristics of the combustor during operation. This …

Prevalence Of Dental Caries In Mexican-American Children And Adolescents Attending Rawlings Pediatric Dental Clinic In El Paso, Texas, Andrea Aguila

Open Access Theses & Dissertations

Abstract

Background and significance: Dental caries is the most common infectious disease in childhood, causing negative long and short term effects in a child’s life. Children living in poverty are twice as likely to be affected by dental caries compared to those living above the poverty level. Of this poverty group, Mexican-American children are the most affected. In the US-Mexico border communities 83% of the population is Hispanic with the majority of them being of Mexican descent, and 30% of those live in poverty. The United States Mexico border is also characterized by a rapid population growth, high unemployment rates, …

Modulation Of The Physiological And Biochemical Effects Of Copper Nanoparticles In Kidney Beans (Phaseouls Vulgaris) Treated By Kinetin, Suzanne Annette Apodaca

Open Access Theses & Dissertations

It is imperative to not only understand the impact of engineered nanomaterials (ENMs) in edible plants, but also the interactions they have with various additives used in agriculture. In this study, kidney bean plants were grown in potting soil treated with nano copper (nCu), bulk copper (bCu), and copper chloride (CuCl2) at concentrations of 0, 50, and 100 mg/kg for 55 and 90 days. At 15 days of growth, 0, 10, and 100 μm of kinetin (KN) were applied to plants. Plant tissue samples were harvested at 55 days and seeds were reaped at 90 days. Physiological and biochemical parameters …

Case Studies In Implementing Intelligent Compaction In Construction Of Earthwork, Jorge Alberto Beltran

Open Access Theses & Dissertations

The nuclear density gauge (NDG) is the current tool for field compaction quality control (QC) and quality assurance (QA) for soil and base layers in the state of Texas. The Texas Department of Transportation (TxDOT) uses this nondestructive testing (NDT) device to determine the compacted density and moisture content of earthwork and unbound aggregates. However, to provide the missing link between design and quality management parameters, an alternative stiffness-based approach would be more desirable. Intelligent Compaction (IC) is defined as continuous assessment of mechanistic soil properties (stiffness, modulus) through roller parameters (frequency, amplitude and speed) integrated with global positioning system …

Dft Study On The Structure And Properties Of Vsc2n@C68, Surendra Bhatta

Open Access Theses & Dissertations

A computational study on the structure and electronic properties of the VSc2N@C68 molecule was carried out using the density functional theory. This molecule is based on the recent report on the synThesis of the VSc2N@C80 and V2ScN@C80 fullerenes. The Sc3N@C68 is also a stable endohedral fullerene that has a cage with fuse pentagonal rings. The doping by a V atom changes the structure as well as the spin state of the Sc3N@C68 from S=0 to S=1 state. Since the C68 has 6332 isomers, we have carried out an extensive search for the lowest energy structure of the C68 in several …

Design Of Experiments-Based Scara Robot Parameter Evaluation For Embedding Electronics Into 3d Print, Sreekara Charith Boppana

Open Access Theses & Dissertations

Additive manufacturing processes combined with enhanced technologies for electronics production enables a highly flexible manufacturing of personalized 3D electronic devices. Due to the enormous progress within the last years, these technologies made their way from prototyping towards manufacturing. The growing request for products manufactured in batch size, making use of a robot to incorporate the electronic components necessary to make functional 3-Dimensional-Structural Electronics will extend the mass production possibilities. There is significant interest in automation of a process is which parameters are influential in the occurrence of assembly defects and which adjustments should be made to those variables to reduce …

Mapping Decisions Of Reporting Asset Misappropriation Within An Accounting Department Using Behavioral, Cognitive, And Cultural Traits, Nora Alaniz Bouqayes

Open Access Theses & Dissertations

The problem of global fraud continues to be pandemic with the cost to organizations exceeding $3.9 trillion of lost revenues every year. Accounting research is slowly embracing the behavioral science research and has expanded limited literature addressing the traits of fraud perpetrators. This study begins to examine behavioral, cognitive, and cultural traits of reporters of fraud in accounting departments. This study narrows the area of interest to asset misappropriation as part of the Occupational Fraud and Abuse Classification System created by the Association of Fraud Examiners. An initial instrument to measure traits is developed and used to map decision paths …

Adaptive Switched Capacitor Voltage Boost For Thermoelectric Generation, Rene A. Brito

Open Access Theses & Dissertations

Thermoelectric generators (TEG) and other forms of energy harvesting often provide voltages that are not directly usable by traditional electronics as levels are too low from the TEG. While increasing the number of thermoelectric elements can ultimately increase the power output, there is a tradeoff between size and power. By implementing charge pumps, a proposed circuit technique is described that can boost the TEG output to levels that can be used for energy harvesting applications. Current voltage boost circuits for TEGs simply boost a voltage by a set amount. The proposed circuit consists of an analog chip, to provide several …

Matilde Ros Leaves The Jungle, Susana Beatriz Camacho Vivar

Open Access Theses & Dissertations

When Matilde defies her mother and abandons her privileged life in a South American capital to fight for environmental justice in the Amazon jungle, she never imagines her journey will bring her right back to where she started. As she insists on freeing herself, four other women around her do the same, defining their freedom when class, gender and race may still get to tell them who they are.