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Sediment Sampling, Characterization, and Analysis on the Guadalupe River in the Coastal Plain of Texas
Report on measured sediment transport data for four USGS gage stations along the Guadalupe River between Seguin, TX and Victoria, TX.
Date:
December 2015
Creator:
Strom, Kyle; Hosseiny, Hossein & Wang, Keh-Han
Object Type:
Report
System:
The Portal to Texas History
Self-assembly Polymeric Nanoparticles Composed of Polymers Crosslinked with Transition Metals for Use in Drug Delivery
A major drawback of chemotherapy is the lack of selectively leading to damage in healthy tissue, which results in severe acute side effects to cancer patients. The use of nanoparticles as a drug delivery system has emerged as novel strategy to overcome the barriers of immunogenic response, controlled release of therapeutic, and targeting the toxicity only to cancerous cells. In this study, polymeric nanoparticles composed of transition metals and particles derived from natural biopolymers have been generated via self-assembly. For example, nanoparticles composed of cobalt crosslinked with albumin (Co-alb NPs) via Co-amine coordination chemistry of lysine residue were syntheisized in various sizes. The method to generate Co-alb NPs involves no thermal heat, organic solvent or any surfactants, which is ideal for the production of large amounts in a timely manner. The Co-alb NPs displayed exceptional stability under physiological conditions (pH 7.4) for several days with minor changes in size; however degradation could be triggered by reductant (reduced glutathione (GSH), 10 mM) with complete disappearance of particles in less than 2 hour. Numerous therapeutics that are highly effective toward cancer cells have been developed; however, many cannot be administered to patients due to poor solubility in water and pH dependent properties. …
Date:
December 2015
Creator:
Nguyen, Duong Thuy
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Self-definition and College Adaptation in Students From the Ronald E. McNair Postbaccalaureate Achievement Program
While a great deal of psychological research is conducted on college students, less has been done on their adaptation to college. These young adults, as they develop ego identity and differentiate themselves from parents and families, must adjust to the social and academic environment of college. Psychosocial adjustment predicts college retention better than academic predictors do. First generation college students face greater than typical challenges adapting to college. The Ronald E. McNair Post-Baccalaureate Achievement Program exists to aid first generation, lower income undergraduate student who wish to pursue a doctoral degree. Self-definition scored from thematic apperceptive technique stories reflects an individual’s relative freedom from social role constraint. This study examined the role of self-definition and familial understanding and acceptance in this population as predictors of successful adaptation to college. While neither was found to be a significant predictor, family understanding and acceptance was found to be a more defining characteristic of this sample than was self-definition. This suggests that when social support is sufficient, individuals do not need to rely on self-definition.
Date:
December 2015
Creator:
Vance, Jeffrey Michael
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Self-efficacy, Academic Engagement, and Student-teacher Relationships for Ninth-grade African American Male Students’ Algebra I Achievement: a Structural Equation Model
The purpose of the current study was to discern the effects of three latent constructs – self-efficacy, academic engagement, and student-teacher relationships on Algebra I achievement among ninth-grade African American male students. A nationally representative sample from the High School Longitudinal Study of 2009 (HSLS09) was used in the study. Study participants were 697 African American males enrolled in ninth grade in the fall of 2009 across the United States. Structural Equation Modeling (SEM) analytical procedures were performed to test the hypothesized relationships of Bandura’s social cognitive theory (SCT) theoretical assumptions. The results indicate that the three latent variables directly or indirectly were related to Algebra I achievement among ninth grade African American male students. Moreover, the results revealed that self-efficacy and student-teacher relationships constructs had direct significant impact on Algebra I academic performance; nonetheless, the relationships were not strong. These two latent variables had small effect sizes of 5% and 1%, respectively. Combined, self-efficacy, academic engagement, and student-teacher relationships explained only 8% of the variance in the Algebra I achievement among African American males across the United States (R2=.08). The magnitude effect of these factors on Algebra I achievement was minimal. Overall, these findings suggest that the self-efficacy and …
Date:
December 2015
Creator:
Onsongo, Evans N.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Sensitivity, Inspiration, and Rational Aesthetics: Experiencing Music in the North German Enlightenment
This dissertation examines pre-Kantian rational philosophy and the development of the discipline of aesthetics in the North German Enlightenment. With emphasis on the historical conception of the physiological and psychological experience of music, this project determines the function of music both privately and socially in the eighteenth century. As a result, I identify the era of rational aesthetics (ca.1750-1800) as a music-historical period unified by the aesthetic function and metaphysical experience of music, which inform the underlying motivation for musical styles, genres, and means of expression, leading to a more meaningful and compelling historical periodization. The philosophy of Alexander Baumgarten, Johann Georg Sulzer, and others enable definitions of the experience of beautiful objects and those concepts related to music composition, listening, and taste, and determine how rational aesthetics impacted the practice, function, and ultimately the prevailing style of music in the era. The construction, style, and performance means of the free fantasia, the most personal and expressive genre of the era, identify its function as the private act of solitude, or a musical meditation. An examination of pleasure societies establishes the role of music in performance and discussion in both social gatherings and learned musical clubs for conveying the morally …
Date:
December 2015
Creator:
Fick, Kimary E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Sequestration as a Budget Enforcement Process: Frequently Asked Questions
This report provides basic information on sequesters generally, particularly those sequesters associated with the Budget Control Act of 2011. This report focuses on general processes associated with sequesters.
Date:
December 1, 2015
Creator:
Lynch, Megan S.
Object Type:
Report
System:
The UNT Digital Library
Shame Due to Heterosexism, Self-esteem and Perceived Stress: Correlates of Psychological Quality of Life in a Lesbian, Gay and Bisexual Sample
Sexual minorities experience higher levels of stress than heterosexuals, which in turn affects coping and psychological quality of life (PQOL). Although many sexual minorities remain mentally healthy, a higher prevalence of mental disorders among members of the lesbian, gay and bisexual (LGB) communities exists; thus, LGB PQOL becomes an important area to examine. Several key factors are related to PQOL: shame due to heterosexism, self-esteem and perceived stress. Using minority stress model, I hypothesized that shame due to heterosexism and perceived stress are negatively correlated with PQOL, while self-esteem is positively correlated with PQOL. I hypothesized that collectively shame due to heterosexism, self-esteem and perceived stress account for a significant proportion of the variance in PQOL, that self-esteem moderates the relationship between perceived stress and PQOL and that age moderates the relationship between shame due to heterosexism and PQOL. I calculated Pearson product-moment correlation coefficient and found shame due to heterosexism was negatively correlated with PQOL (r(146) = -.21, p = .009), perceived stress was negatively correlated with PQOL (r (146) = -.69, p < .001) and self-esteem was positively correlated with PQOL (r(146) = .72, p < .001). I conducted a regression analysis and found our model accounted for …
Date:
December 2015
Creator:
Bonds, Stacy E.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
[Shrimp Cocktail at the Don Juan Restaurant]
Photograph of Prawn cocktail, also known as shrimp cocktail, is a seafood dish consisting of shelled, cooked prawns in a Marie Rose sauce or cocktail sauce, served in a glass. Don Juan, a Mexican restaurant located at Tyler, Texas was established out of love for tacos and family values. Juan Barron started out as a side business, selling tacos during soccer games on Sundays and now it has grown into three successful restaurants.
Date:
December 2015
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
Single Notch Versus Multi Notch Credit Rating Changes and the Business Cycle
Issuers’ credit ratings change by one or more notches when credit rating agencies provide new ratings. Unique to the literature, I study the influences affecting multi notch versus single notch rating upgrades and downgrades. For Standard & Poors data, I show that rating changes with multiple notches provide more information to the market than single notch rating changes. Consistent with prior literature on the business cycle, I show that investors value good news rating changes (upgrades) more in bad times (recession) and that investors value bad news rating changes (downgrades) more in good times (expansion). I model and test probit models using variables capturing the characteristics of the previous issuer’s credit rating, liquidity, solvency, profitability, and growth opportunity to determine the classification of single notch versus multi notch rating changes. The determinants of multi notch versus single notch rating changes for upgrades and downgrades differ. Business cycle influences are evident. Firms that have multi notch rating upgrades and downgrades have significantly different probit variables vis-à-vis firms that have single notch rating upgrades and downgrades. The important characteristics for determining multiple notch upgrades are a firm’s prior rating change, prior rating, cash flow, total assets and market value. The important characteristics …
Date:
December 2015
Creator:
Poudel, Rajeeb
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Small Town Retail Change in East Texas: an Analysis of Retail Growth, Decline, and Spatial Reconfiguration
In recent years, small towns have experienced declining levels of retail activity attributable to a variety of factors. Previously conducted research identifies a number of these factors such as changing population dynamics, continuously evolving retail practices, locational factors, and an assortment of other macroeconomic factors. Although retail decline is common for many small towns, there are some small towns that have been able to maintain their viability in an ever-changing economic climate. The primary purpose of this research is to better understand what spatial and socio-economic characteristics contribute to retail growth and decline in a series of small towns. This research highlights a selection of small towns across a 14 county area within east Texas. The selection of small towns includes a number of towns with an increasing number of retail establishments as well as a number of towns with decreasing retail establishments over the 14 year study timeframe. Contained within this research is a discussion of small town economic and retail development, as well as findings regarding spatial and socio-economic characteristics as they relate to retail growth and decline in small towns. This research finds that locational characteristics do have an effect on retail growth and decline. The research …
Date:
December 2015
Creator:
Whitaker, Carl W.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Social Participation and Depression Among Elderly People in Greece
The researcher had two objectives: first, explore how social involvement changes by age among Greek elderly, and second, examine the relationship between social involvement and depression by age among study participants, controlled for education, marital status, and gender. The researcher used data from the 2004 Survey of Health, Aging, and Retirement in Europe (SHARE) database subjecting a sample of 2,898 elderly aged 50 or older to analysis in terms of the study questions. Approximately 43% of the participants (n = 1,244) were males and 57% were females (n = 1,654). Study results showed Greek elderly participated more in religious activities and less in non-religious activities with increasing age. The study results showed the level of education did not have an effect on the level of religious or non-religious participation. Marital status could influence Greeks’ tendency to participate in religious activities, however, it did not have an effect on non-religious participation. Women are more likely to participate in religious activities than the men. The gender of the participants did not have an effect on non-religious participation. Older Greek elderly were more likely to be depressed than the younger elderly. Participation in religious activities was not shown to relate to decreasing the …
Date:
December 2015
Creator:
Simmons, Daniela
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
South Texas Catholic (Corpus Christi, Tex.), Vol. 50, No. 11, Ed. 1, December 2015
Monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date:
December 2015
Creator:
Cardenas, Alfredo E.
Object Type:
Newspaper
System:
The Portal to Texas History
Southwest Retort, Volume 68, Number 4, December 2015
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
December 2015
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Spatial- Temporal Distribution of Organic Matter and Carbonate Chemistry Parameters in Texas Mid-Coast Estuaries
Report examining the increasing demands on freshwater resources and the resulting lack of freshwater flow to coastal waters. Includes methodology of the study, results, discussions, and conclusions.
Date:
December 2015
Creator:
Wetz, Michael S. & Hu, Xinping
Object Type:
Report
System:
The Portal to Texas History
Spatially Explicit Modeling of West Nile Virus Risk Using Environmental Data
West Nile virus (WNV) is an emerging infectious disease that has widespread implications for public health practitioners across the world. Within a few years of its arrival in the United States the virus had spread across the North American continent. This research focuses on the development of a spatially explicit GIS-based predictive epidemiological model based on suitable environmental factors. We examined eleven commonly mapped environmental factors using both ordinary least squares regression (OLS) and geographically weighted regression (GWR). The GWR model was utilized to ascertain the impact of environmental factors on WNV risk patterns without the confounding effects of spatial non-stationarity that exist between place and health. It identifies the important underlying environmental factors related to suitable mosquito habitat conditions to make meaningful and spatially explicit predictions. Our model represents a multi-criteria decision analysis approach to create disease risk maps under data sparse situations. The best fitting model with an adjusted R2 of 0.71 revealed a strong association between WNV infection risk and a subset of environmental risk factors including road density, stream density, and land surface temperature. This research also postulates that understanding the underlying place characteristics and population composition for the occurrence of WNV infection is important for …
Date:
December 2015
Creator:
Kala, Abhishek K.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Spray Cooling with HFC-134a and HFO-1234yf for Thermal Management of Automotive Power Electronics
This study aims to experimentally investigate the spray cooling characteristics for active two-phase cooling of automotive power electronics. Tests are conducted on a small-scale, closed loop spray cooling system featuring a pressure atomized spray nozzle. Two types of refrigerants, HFC-134a (R-134a) and HFO-1234yf, are selected as the working fluids. The test section (heater), made out of oxygen-free copper, has a 1-cm2 plain, smooth surface prepared following a consistent procedure, and would serve as a baseline case. Matching size thick film resistors, attached onto the copper heaters, generate heat and simulate high heat flux power electronics devices. The tests are conducted by controlling the heat flux in increasing steps, and recording the corresponding steady-state temperatures to obtain cooling curves. The working fluid is kept at room temperature level (22oC). Performance comparisons are made based on heat transfer coefficient (HTC) and critical heat flux (CHF) values. Effects of spray characteristics and liquid flow rates on the cooling performance are investigated with the selected coolants. Three types of commercially available nozzles that generate full-cone sprays with fine droplets are utilized in the tests. Effect of liquid flow rate is evaluated varying flow rates at 2, 3, 4 ml/s. The experimental results obtained from …
Date:
December 2015
Creator:
Yaddanapudi, Satvik Janardhan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Synchrotron Radiation X-Ray Diffraction of Nickel-Titanium Shape Memory Alloy Wires During Mechanical Deformation
Shape memory alloys (SMAs) are a new generation material which exhibits unique nonlinear deformations due to a phase transformation which allows it to return to its original shape after removal of stress or a change in temperature. It shows a shape memory effect (martensitic condition) and pseudoelasticity (austenitic condition) properties depends on various heat treatment conditions. The reason for these properties depends on phase transformation through temperature changes or applied stress. Many technological applications of austenite SMAs involve cyclical mechanical loading and unloading in order to take advantage of pseudoelasticity, but are limited due to poor fatigue life. In this thesis, I investigated two important mechanical feature to fatigue behavior in pseudoelastic NiTi SMA wires using high energy synchrotron radiation X-ray diffraction (SR-XRD). The first of these involved simple bending and the second of these involved relaxation during compression loading. Differential scanning calorimetry (DSC) was performed to identify the phase transformation temperatures. Scanning electron microscopy (SEM) images were collected for the initial condition of the NiTi SMA wires and during simple bending, SEM revealed that micro-cracks in compression regions of the wire propagate with increasing bend angle, while tensile regions tend to not exhibit crack propagation. SR-XRD patterns were analyzed …
Date:
December 2015
Creator:
Zhang, Baozhuo
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Synthesis Report of Purpose and Need: Assessment of Event Egress for Houston's Reliant Stadium
Report on a study assessing the current state of egress for Houston's Reliant Stadium to reduce congestion after events.
Date:
December 2015
Creator:
University of Texas at Austin. Center for Transportation Research.
Object Type:
Report
System:
The Portal to Texas History
Taking the Irish Pulse: A Revitalization Study of the Irish Language
This thesis argues that Irish can and should be revitalized. Conducted as an observational study, this thesis focuses on interviews with 72 participants during the summer of 2013. All participants live in the Republic of Ireland or Northern Ireland. This thesis investigates what has caused the Irish language to lose power and prestige over the centuries, and which Irish language revitalization efforts have been successful. Findings show that although, all-Irish schools have had a substantial growth rate since 1972, when the schools were founded, the majority of Irish students still get their education through English-medium schools. This study concludes that Irish will survive and grow in the numbers of fluent Irish speakers; however, the government will need to further support the growth of the all-Irish schools. In conclusion, the Irish communities must take control of the promotion of the Irish language, and intergenerational transmission must take place between parents and their children.
Date:
December 2015
Creator:
Roloff, Donna Cheryl
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Tales of Texas Cooking: Stories and Recipes from the Trans-Pecos to the Piney Woods and High Plains to the Gulf Prairies
Access:
Use of this item is restricted to the UNT Community
According to Renaissance woman and Pepper Lady Jean Andrews, although food is eaten as a response to hunger, it is much more than filling one's stomach. It also provides emotional fulfillment. This is borne out by the joy many of us feel as a family when we get in the kitchen and cook together and then share in our labors at the dinner table. Food is comfort, yet it is also political and contested because we often are what we eat--meaning what is available and familiar and allowed. Texas is fortunate in having a bountiful supply of ethnic groups influencing its foodways, and Texas food is the perfect metaphor for the blending of diverse cultures and native resources. Food is a symbol of our success and our communion, and whenever possible, Texans tend to do food in a big way. This latest publication from the Texas Folklore Society contains stories and more than 120 recipes, from long ago and just yesterday, organized by the 10 vegetation regions of the state. Herein you'll find Senator Kay Bailey Hutchinson's Family Cake, memories of beef jerky and sassafras tea from John Erickson of Hank the Cowdog fame, Sam Houston's barbecue sauce, and stories …
Date:
December 2015
Creator:
Vick, Frances Brannen, 1935-
Object Type:
Book
System:
The UNT Digital Library
[Tamale at the Don Juan Restaurant]
Photograph of a salsa named Tamale, which is served on the sides of Mexican dishes.Don Juan, a Mexican restaurant located at Tyler, Texas was established out of love for tacos and family values. Juan Barron started out as a side business, selling tacos during soccer games on Sundays and now it has grown into three successful restaurants.
Date:
December 2015
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
Teaching Children with Autism to Vocally Mand for Others to Perform an Action
Mand training is a very logical and natural procedure to begin teaching communication skills to individuals with autism. Existing research has documented strategies for teaching children with autism to mand for preferred items, although there are fewer high quality studies on teaching children to mand for other people to perform an action. In addition to improving the general mand repertoire, teaching children to mand for others to perform an action is important because it allows children with autism to communicate ways in which another person could improve their environment by performing a simple action. The purpose of this study was to document a functional relation between mand training and acquisition and generalization of unprompted mands for another person to perform an action. Using a multiple-baseline design across participants, four children with autism were taught to mand for an adult to perform a variety of actions (e.g., to open a container so the child could obtain a preferred item). Results showed that the intervention produced an increase in unprompted mands for actions for all participants. Additionally, all participants demonstrated unprompted mands at or above mastery criteria during all generalization sessions in a different setting and different interventionist. The magnitude of effect …
Date:
December 2015
Creator:
Terry, Callie A.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
A Teaching Guide for Debussy and Ravel: Technical and Stylistic Applications for Korean Piano Teachers
Most Korean students study very little French music during their pre-college years. A survey of ten Korean piano professors as well as an investigation into the annual set repertoire from universities, music high schools, middle schools and national competitions in Korea show that French repertoire appears very seldom on the list of required repertoire. Therefore, it is easy for Korean students to neglect French piano music. By the time students reach undergraduate or graduate school and are required to play the music of Debussy and Ravel for the first time, they find themselves at a serious disadvantage. The purpose of this paper is to provide a pedagogical guide for Korean teachers who wish to offer their beginning, middle school and high school students a good foundation in the style of French piano music. This syllabus will introduce a series of French piano pieces, from Couperin and Rameau as well as Chaminade and Fauré to the easier pieces of Debussy and Ravel, which will lead to the ultimate goal of interpreting aspects of French tone, style, technique, and cultural context involved in the eventual successful performance of the more advanced pieces of Debussy and Ravel, which are the bedrock of French …
Date:
December 2015
Creator:
Kim, Kiryang
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Texas Birth Defects Monitor, Volume 21, December 2015
Semi-annual newsletter of the Texas Department of State Health Services Birth Defects Epidemiology and Surveillance Branch describing statistics related to common types of birth defects, prevention and treatment of birth defects, and rates of occurrence of various types of birth defects in Texas.
Date:
December 2015
Creator:
Texas. Birth Defects, Epidemiology, and Surveillance.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History