Digital Commons Network^™

Unidirectional Spectral Singularities, Hamidreza Ramezani, Hao Kun Li, Yuan Wang, Xiang Zhang

Physics and Astronomy Faculty Publications and Presentations

We propose a class of spectral singularities emerging from the coincidence of two independent singularities with highly directional responses. These spectral singularities result from resonance trapping induced by the interplay between parity-time symmetry and Fano resonances. At these singularities, while the system is reciprocal in terms of a finite transmission, a simultaneous infinite reflection from one side and zero reflection from the opposite side can be realized.

Farmer To Pharmacist: Curcumin As An Anti-Invasive And Antimetastatic Agent For The Treatment Of Cancer, Debasish Bandyopadhyay

Chemistry Faculty Publications and Presentations

A huge number of compounds are widely distributed in nature and many of these possess medicinal/biological/pharmacological activity. Curcumin, a polyphenol derived from the rhizomes (underground stems) of Curcuma longa Linn (a member of the ginger family, commonly known as turmeric) is a culinary spice and therapeutic used in India for thousands of years to induce color and flavor in food as well as to treat a wide array of diseases. The origin of turmeric as spice and folklore medicine is so old that it is lost in legend. Curcumin has many beneficial pharmacological effects which includes, but are not limited …

‘How Could This Happen?’: A Century Of Marti-Colon Cemetery, Justin White

University Library Publications and Presentations

The Marti-Colon cemetery, originally purchased by the city in 1896 as a final resting place for the residents of West Tampa, has repeatedly failed its charge of “perpetual care” over its extensive existence.^[1] Backed by a collection of resources compiled by Henry Echezabal in his search to find missing graves of Centro Asturiano members, the accounts of mismanagement, failure of government oversight, buryovers, and general neglect create a story that spans over 100 years and still affects West Tampa families.

In 1903, J. L. Reed Sr. purchased the land that would encompass the Marti-Colon Cemetery. In the 1930s, when …

The Pan American (2014-12-03), Susan Gonzalez, Andrew Vera

UTPA Archives - The Pan American

No abstract provided.

The Collegian (2014-12-01), Cleiri Quezada

UTB/TSC Archives - The Collegian

No abstract provided.

Social Networking Site Use Among Caregivers Of Children With Autism Spectrum Disorders, Murad Moqbel, Lauren Little

Information Systems Faculty Publications and Presentations

Caregivers of children with autism spectrum disorder (ASD) experience higher levels of stress relative to those of children with other developmental disabilities and typical development. To date, little research has empirically examined the relationship between social supports, social networking site (SNS) use, and stress among caregivers of children with ASD. Using the resiliency model of family stress, adjustment, and adaptation as a theoretical framework, we explore the links between perceived social supports, SNS use, and stress among caregivers of children with ASD. We do this by conducting a crosssectional research design and using a structural equation modeling statistical approach. Practical …

Building Capacity For Dementia Care In Latin America And The Caribbean, Francisco J. Gonzalez, Ciro Gaona, Marialcira Quintero, Carlos A. Chavez, Joyce Selga, Gladys E. Maestre

School of Medicine Publications and Presentations

Latin America and the Caribbean (LAC) have limited facilities and professionals trained to diagnose, treat, and support people with dementia and other forms of cognitive impairment. The situation for people with dementia is poor, and worsening as the proportion of elderly in the general population is rapidly expanding. We reviewed existing initiatives and provided examples of actions taken to build capacity and improve the effectiveness of individuals, organizations, and national systems that provide treatment and support for people with dementia and their caregivers. Regional barriers to capacity building and the importance of public engagement are highlighted. Existing programs need to …

Characterizing Thalamo-Cortical Disturbances In Schizophrenia And Bipolar Illness, Alan Anticevic, Michael W. Cole, Grega Repovs, John D. Murray, Margaret S. Brumbaugh, Anderson M. Winkler, Aleksandar Savic, John H. Krystal, Godfrey D. Pearlson, David Glahn

School of Medicine Publications and Presentations

Schizophrenia is a devastating neuropsychiatric syndrome associated with distributed brain dysconnectivity that may involve large-scale thalamo-cortical systems. Incomplete characterization of thalamic connectivity in schizophrenia limits our understanding of its relationship to symptoms and to diagnoses with shared clinical presentation, such as bipolar illness, which may exist on a spectrum. Using resting-state functional magnetic resonance imaging, we characterized thalamic connectivity in 90 schizophrenia patients versus 90 matched controls via: (1) Subject-specific anatomically defined thalamic seeds; (2) anatomical and data-driven clustering to assay within-thalamus dysconnectivity; and (3) machine learning to classify diagnostic membership via thalamic connectivity for schizophrenia and for 47 bipolar …

Establishment And Spread Of A Single Parthenogenic Genotype Of The Mediterranean Arundo Wasp, Tetramesa Romana1, In The Variable Climate Of Texas, John A. Goolsby, John F. Gaskin, Daniel V. Tarin, Alan E. Pepper, Don C. Henne, Allan Auclair, Alexis Racelis, Kenneth R. Summy, Patrick J. Moran, Donald B. Thomas

Biology Faculty Publications and Presentations

As part of a biological control program for the invasive weed, Arundo donax L., several genotypically unique populations of the parthenogenetic stemgalling wasp, Tetramesa romana Walker (Hymenoptera: Eurytomidae), from Spain and France were released in an infested riparian zone along the Rio Grande from Brownsville to Del Rio, TX. An adventive population of the wasp of unknown origin with limited distribution in Texas was also discovered, evaluated, and released as part of the program. More than 1.2 million wasps representing the mixture of genotypes were aerially released from 2009 to 2011. Wasps dispersed from their original release locations and now …

Improved Upper Limits On The Stochastic Gravitational-Wave Background From 2009–2010 Ligo And Virgo Data, J. Aasi, B. P. Abbott, H. Daveloza, Mario C. Diaz, S. R. Morriss, Soma Mukherjee, M. E. Normandin, O. Puncken, Volker Quetschke, Malik Rakhmanov, K. E. Ramirez, Joseph D. Romano, Robert Stone, Cristina V. Torres, G. Valdes

Physics and Astronomy Faculty Publications and Presentations

Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the Universe that is unavailable through standard electromagnetic observations, making its study of fundamental importance to understanding the evolution of the Universe. We carry out a search for the stochastic background with the latest data from the LIGO and Virgo detectors. Consistent with predictions from most stochastic gravitational-wave background models, the data display no evidence of a stochastic gravitational-wave signal. Assuming a gravitational-wave spectrum of ΩGWðfÞ ¼ Ωαðf=fref Þα, we place …

Self-Compassion And Employment Issues Of Persons With Disabilities, Susan Stuntzner

Counseling Faculty Publications and Presentations

Self-compassion……..What is it? Why is it of value? How does it relate to the employment needs of persons with disabilities? These are just a few of the questions people might have when they hear the term followed by having it associated with employment and persons with disabilities. For starters, self-compassion is not a topic that has been historically discussed openly, correctly understood, or promoted. Instead, the societal message when faced with difficult life events such as disability, unemployment, and lack of resources (i.e., access, education) has been one of “just man up and deal with it.” Self-compassion offers everyone, including …

Relationship Between Stream Velocity & Depth And Snail Size Distribution & Density Of The Balcones Elimia, Elimia Comalensis (Pilsbry, 1890) (Gastropoda: Pleuroceridae) In Comal Springs, Texas, Kathryn E. Perez, Russell L. Minton, Scott A. Reese, David M. Haye

Biology Faculty Publications and Presentations

Pleurocerid snails are important components of aquatic ecosystems and the majority of species are threatened or endangered. This study describes aspects of the life-history of Elimia comalensis, specifically population density in relationship to water velocity and depth, and seasonal change. Also examined are spatial segregation of different E. comalensis age groups and the relationship of snail size (proxy for age) to 110w, depth, and seasonal change. The study was carried out in the lotic portion of spring run 3, Coma! Springs, New Braunfels, Texas, by quadrat sampling at 10 in intervals from the spring head to Landa Lake in Fall. …

Study Of Creative Processes That Lead To Successful Visually Narrative Art Products, Denissa U. Kiehl

Theses and Dissertations - UTB/UTPA

The success of an artist’s work depends upon a few key factors. No matter which field of study you pursue as an individual it is important to examine and understand previously collected knowledge and works developed within that field. Once an artist has learned from the successful “Old” methods and examples of artworks he or she may then combine the “Old” with some of his or her “New” methods and ideas. When it comes to visual narrative art there is a large variety of visual art and other creations to learn from. Factors related to decision making will change with …

Differential Response By Bronzed Cowbirds To Songs Of Potential Hosts In The Lower Rio Grande Valley Of Texas, Mary J. Janecka, Timothy Brush

Biology Faculty Publications and Presentations

How bronzed cowbirds (Molothrus aeneus) find nests to parasitize is poorly known, especially whether they use host vocalizations as sources of information about nest location and status. We conducted 120 point-count surveys, followed by broadcasts of host songs, at Santa Ana National Wildlife Refuge in the Lower Rio Grande Valley of Texas in 2008 and 2009. Bronzed cowbirds responded to songs of potential host species by flying toward the source of the playback as single females or males or multiple females and males. Bronzed cowbirds responded in greater numbers to the songs of oriole species (Icterus) …

Imaging, Spectroscopic, Mechanical And Biocompatibility Studies Of Electrospun Tecoflex® Eg 80a Nanofibers And Composites Thereof Containing Multiwalled Carbon Nanotubes, Javier Macossay-Torres, Faheem A. Sheikh, Travis Cantu, Thomas Eubanks, M. Esther Salinas, Chakavak S. Farhangi, Hassan Ahmad, M. Shamshi Hassan, Myung-Seob Khil, Shivani K. Maffi, Hern Kim, Gary L. Bowlin

Chemistry Faculty Publications and Presentations

The present study discusses the design, development and characterization of electrospun Tecoflex® EG 80A class of polyurethane nanofibers and the incorporation of multiwalled carbon nanotubes (MWCNTs) to these materials. Scanning electron microscopy results confirmed the presence of polymer nanofibers, which showed a decrease in fiber diameter at 0.5% wt. and 1% wt. MWCNTs loadings, while transmission electron microscopy showed evidence of the MWCNTs embedded within the polymer matrix. The fourier transform infrared spectroscopy and Raman spectroscopy were used to elucidate the polymer-MWCNTs intermolecular interactions, indicating that the C-N and N-H bonds in polyurethanes are responsible for the interactions with MWCNTs. …

Characterization Of Gan Thin Films Grown By Rf Magnetron Sputtering For Fabrication Of An Algan/Gan Hemt Biosensor, Rocio Yolanda Garza

Theses and Dissertations - UTB/UTPA

Radio-Frequency (RF) Magnetron Sputtering has been used to grow GaN thin films for future fabrication of an AlGaN/GaN HEMT biosensor. A GaN target was sputtered at various parameters on silicon and sapphire substrates, at room temperature and at elevated temperature using substrate heating and post deposition annealing treatment. The research conducted investigates the effects of sputtering gas (Argon or Nitrogen gas), RF power (40W or 50W), and pressure (4mT – 30mT) on the structural properties of the thin films. Imaging tools such as the Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray Diffractometer (XRD), and …

Companies' Responses To Negative Online Reviews, Claudia L. Ramos

Theses and Dissertations - UTB/UTPA

Past research has revealed that very little research had examined services recovery strategies in the online context. The study investigated different types of companies’ responses to negative online reviews as a service recovery strategy after a service failure. The current research centers on the relationship between one service recovery strategy and three online customer behavioral reactions: post-purchase cognitive dissonance, post-recovery satisfaction and re-purchase intentions. Participants were randomly assigned to one of five conditions and were asked to complete a questionnaire that measured cognitive dissonance, post-recovery satisfaction and re-purchase intention scores, as well as demographic items. Results showed that the apology …

Difference In The Perception Of Political Art Inside And Outside The Art Gallery, Jose Maria Parga

Theses and Dissertations - UTB/UTPA

The purpose of the research for this exhibit was to explore whether a major difference exists in the way political art is perceived by an audience when the art is in an art exhibition and when it is seen in an urban environment. Since the subject matter of En el País de No Pasa Nada, is the current wave of violence and corruption happening in Mexico, the targeted audience for this exhibited is limited to Mexican people and people on the US border with Mexico. If there is a difference in perception, what does the work of art gain, and …

Two Dimensional Mathematical Model Of Fluid Flow In A Growing Solid Tumor, Adriana Gracia

Theses and Dissertations - UTB/UTPA

We investigate the problem of steady and unsteady fluid flow in a growing solid tumor. We develop a mathematical model for the two dimensional fluid flow in a spherical tumor where the spatial variations of the interstitial velocity, interstitial pressure and the drug concentration within the tumor are, in general, with respect to the radial distance and the latitudinal angle in the spherical coordinates. The expressions for radial and latitudinal variations of the interstitial velocity, interstitial pressure, and the two investigated drug concentrations were determined analytically. We calculated these quantities in the tumor as well as in a corresponding normal …

Seeds Of Solutions™: An Economical & Efficient Approach Towards Power Engineering Education, Eli Alvarez

Theses and Dissertations - UTB/UTPA

Power demands are set to increase over the next twenty years; however, research shows that there may be a shortage of power engineers due to an appreciable percentage of the current power engineer workforce retiring, insufficient enrollment in power engineering programs and a lack of emphasis in power engineering at the university level. This thesis provides supporting research for future power demands, workforce and faculty shortages. Using temporary research in modern learning / teaching styles, student / teacher perceptions, educational trends and regional course offerings, this thesis describes a learning approach towards power engineering education. Designed specifically for universities with …

Reflections Of Oppression, Fatemeh Semiari

Theses and Dissertations - UTB/UTPA

This thesis is an investigation into the lives of women living in Iran. I develop a critical framework for understanding it. It is now my understanding that women suffer greatly from the restrictions they are subjected to. I discuss what some of these restrictions are, and how these pressures create turmoil and confusion within some women. The artwork created for my thesis project is a reflection upon the relationship between social proscription and a woman’s desire to express her individuality publicly. The women I portray in my thesis project exhibit a range of emotions such as anger, depression, despair, defeat, …

Gps-Miv: The General Purpose System For Multi-Display Interactive Visualization, Irving A. Gonzalez Garza

Theses and Dissertations - UTB/UTPA

The new age of information has created opportunities for inventions like the internet. These inventions allow us access to tremendous quantities of data. But, with the increase in information there is need to make sense of such vast quantities of information by manipulating that information to reveal hidden patterns to aid in making sense of it. Data visualization systems provide the tools to reveal patterns and filter information, aiding the processes of insight and decision making. The purpose of this thesis is to develop and test a data visualization system, The General Purpose System for Multi-display Interactive Visualization (GPS-MIV). GPS-MIV …

Developing The Modern Heroine Of Fantasy Literature: An Examination Of Lyra From "His Dark Materials" And Clary From "The Mortal Instruments", Diana Aileen Borghols Herrera

Theses and Dissertations - UTB/UTPA

This work looks at the figure of the heroine as present through the characters of Lyra Belacqua in His Dark Materials and Clary Fairchild in The Mortal Instruments. The characters will be analysed within the fantasy genre and the tradition of the heroic figure. By defining the hero and the heroine, two types of characters with different traits, I will show that the heroic archetype for the female is not entirely set. Lyra and Clary share some similarities but their relation to their respective role is perceived and fulfilled through varying degrees of commitment. The analysis will be contained to …

Detection Of Gravitational Wave Signals From Ns-Ns Inspirals In Presence Of Non-Stationary Noise, Wenhui Wang

Theses and Dissertations - UTB/UTPA

Gravitational Wave (GW) detection is an important and inspiring project. Once detected, it will open a new window to understand the universe. The laser interferometer GW detectors, specially LIGO, is the most sensitive detectors at the moment, which can detect GW signal as weak as 10−21. Chirp signal generated by neutron star binaries is a well modeled waveform. One goal of LIGO is to study chirp signal detection. In this field, matched filtering is a widely used method. But since LIGO noise is non-stationary, which will weaken the efficiency of general matched filtering. In this work, a modified matched filtering …

La Intencion Pictorica En Tres Novelas De Corte Realista De Ana Maria Matute, Viviana Carvajal

Theses and Dissertations - UTB/UTPA

This thesis proposes a study about the profound relationship existing in the literary production of the Spanish author, Ana María Matute, between the poetic language found in her narrative and the Visual Arts. While a number of critics and researchers have analyzed in depth the works of this author, there is no abundance of studies that explore the pictorial intention found in them. Likewise, there are scarce or marginal contributions focused on the notion of ekphrasis in connection to her narrative. In order to analyze the rhetoric structure in Matute’s narrative, a definition of “space” as a literary category is …

Preliminary Transcriptome Analysis And Homeobox Gene Isonlation For Tomocerus Minor (Entomobryomorpha: Tomoceridae), Alejandro Alaniz

Theses and Dissertations - UTB/UTPA

Collembola, or “springtails,” are small, edaphic arthropods classified as Entognatha; a group traditionally included as part of Hexapoda and sister-group to the true insects. However, some genetic studies suggest that they may instead have derived from a separate crustacean lineage rather than from a proto-Insecta lineage. The unique abdominal structures that develop on the collembolan ventral abdomen appear to be appendicular in origin – atypical to the canonical, appendage-less insect abdomen ground plan. I developed culture and embryo fixation protocols for; and sequenced and analyzed a multi-stage embryo transcriptome for Tomocerus minor (Collembola: Entomobryomorpha). This analysis annotated 14,417 distinct genes, …

Sign Me Up! Determining Motivation For High School Chemistry Students Enrolling In A Second Year Chemistry Course, Nilda N. Camarena

Theses and Dissertations - UTB/UTPA

A sample of 108 Pre-AP Chemistry students in Texas participated in a study to determine motivational factors for enrolling in AP Chemistry and University Chemistry. The factors measured were academic attitude, perceptions of chemistry, confidence level in chemistry, and expectations/experiences in the chemistry class. Students completed two questionnaires, one at the beginning of the year and one at the end. Four high school campuses from two school districts in Texas participated. Two campuses were traditional high schools and two were smaller magnet schools. The results from this study are able to confirm that there are definite correlations between academic attitudes, …

Landing: On The Other Side, Marianita Escamilla

Theses and Dissertations - UTB/UTPA

Landing: On the Other Side a collection of essays that discuss one woman's struggle with the Chronic Fatigue Syndrome, Fibromyalgia (FM). The narratives are organized non-chronologically because the more pervasive effects of this chronic illness manifest in waves that do not follow a simple means of progression. Rather, FM's most powerful symptom is the highly variable pain strength coupled with its unpredictability.

The mass marketability of this text, as with other illness/disability narratives, lies in the universal message of prevailing against adversity. A person need not suffer from this illness or any ailment to comprehend the narrator's plight. While this …

A Preventive Maintenance Framework In Dairy Production Operations, Maria F. Vargas

Theses and Dissertations - UTB/UTPA

Dairy operations suffer frequent stops. Product shrinkage is a consequence of downtime, which includes losses of packaging material, scraped finish product and capacity. This work proposes a troubleshooting methodology to identify causes of downtime, estimation of waste cost, and minimization of operation disruptions by applying a combination of a cost function to assess waste, and performance measurements. The drinkable yogurt process is evaluated to find the principal areas for wasted bottles and yogurt. In order to make a decision about which of those sources to address, a General Cost Function is used to estimate waste cost which include measurements that …

Educational Practices, Funding, And The Implementation Of A Reading First Program, Maria Maricela Rodriguez-Salaiz

Theses and Dissertations - UTB/UTPA

The National Reading Panel (NICHD, 2000) found that too many children struggle with learning to read. Through a Congressional mandate, the panel identified key skills and methods that were central to reading achievement in the grades kindergarten through third grade. According to the United States Department of Education (USDE) Summary of Discretionary Funds (2008b), over $6 billion were allocated to the schools to implement the research based strategies from 2002 to 2008. States throughout the country showed gains from the states’ first year of implementation to 2008 in grades 1-3 in comprehension assessments. The Reading First: Student Achievement, Teacher Empowerment, …