Partner
UNT Libraries Government Documents Department
1,029
UNT Libraries Special Collections
285
UNT Libraries
249
Oklahoma Historical Society
84
Boyce Ditto Public Library
46
Cowtown Coliseum
40
Brownwood Public Library
27
Ennis Public Library
23
Sterling Municipal Library
23
National Museum of the Pacific War/Admiral Nimitz Foundation
20
71 More
Collection
Texas Digital Newspaper Program
508
Office of Scientific & Technical Information Technical Reports
386
Texas Laws and Resolutions Archive
317
Tocker Foundation Grant
222
The Black Academy of Arts and Letters Records
217
Congressional Research Service Reports
150
UNT Theses and Dissertations
147
Oklahoma Digital Newspaper Program
88
Ladd & Katherine Hancher Library Foundation
84
Texas State Publications
84
120 More
Degree Department
Degree Discipline
Degree Level
Country
Year
Month
Results:
1 - 24 of
2,220
next
1 mil gold bond wire study.
In microcircuit fabrication, the diameter and length of a bond wire have been shown to both affect the current versus fusing time ratio of a bond wire as well as the gap length of the fused wire. This study investigated the impact of current level on the time-to-open and gap length of 1 mil by 60 mil gold bond wires. During the experiments, constant current was provided for a control set of bond wires for 250ms, 410ms and until the wire fused; non-destructively pull-tested wires for 250ms; and notched wires. The key findings were that as the current increases, the gap length increases and 73% of the bond wires will fuse at 1.8A, and 100% of the wires fuse at 1.9A within 60ms. Due to the limited scope of experiments and limited data analyzed, further investigation is encouraged to confirm these observations.
Date:
May 1, 2013
Creator:
Huff, Johnathon; McLean, Michael B.; Jenkins, Mark W. & Rutherford, Brian Milne
Object Type:
Report
System:
The UNT Digital Library
2012 Undergraduate Transportation Scholars Program: Compendium of Student Papers
This report is a compilation of research papers written by undergraduate students participating in the 2012 Undergraduate Transportation Scholars Program.
Date:
May 2013
Creator:
Texas A & M Transportation Institute
Object Type:
Text
System:
The Portal to Texas History
Accelerated Stress Testing, Qualification Testing, HAST, Field Experience - What Do They All Mean?
This presentation discusses the need for a set of tests for modules that would predict their long term-field performance.
Date:
May 1, 2013
Creator:
Wohlgemuth, J.
Object Type:
Presentation
System:
The UNT Digital Library
Accelerating Fatigue Testing for Cu Ribbon Interconnects
This presentation describes fatigue experiments and discusses dynamic mechanical loading for Cu ribbon interconnects.
Date:
May 1, 2013
Creator:
Bosco, N.; Silverman, T.; Wohlgemuth , J.; Kurtz, S.; Inoue, M.; Sakurai, K. et al.
Object Type:
Presentation
System:
The UNT Digital Library
Accomplished Teachers' Instructional Decisions About Shakespeare
Teachers' decisions are a powerful influence on student learning and it is important to fully document accomplished teachers' instructional decisions, as well as to investigate possible influences on those decisions. Shakespearean dramas are central to high school curricula across the U.S. and pose particular instructional challenges, therefore teachers' decisions about teaching these texts are of particular interest. There is limited empirical research, however, about these instructional decisions. Thus, the purpose of this study was to describe how four accomplished high school English teachers working on a single campus make instructional decisions about teaching a Shakespearean play. Specifically, research questions addressed teachers' decisions regarding the teaching of a Shakespearean play and various influences on those decisions (self-reports and inferences from the data). Case study methodology was used, including an inductive analysis of individual teacher interviews, classroom observations, focus group, instructional artifacts, and researcher's journal. The findings revealed that instructional activities described by these teachers addressed support for meaning-making during four stages of reading instruction: (a) before, during, and after; (b) before; (c) during; and (d) after. Comparison of these cases suggests that, although each teacher brings personal preferences and unique background knowledge to her instructional decisions, all make decisions to promote …
Date:
May 2013
Creator:
Parris, Sheri Rene’
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Accounting for the Variation of Driver Aggression in the Simulation of Conventional and Advanced Vehicles
This presentation discusses a method of accounting for realistic levels of driver aggression to higher-level vehicle studies, including the impact of variation in real-world driving characteristics (acceleration and speed) on vehicle energy consumption and different powertrains (e.g., conventionally powered vehicles versus electrified drive vehicles [xEVs]). Aggression variation between drivers can increase fuel consumption by more than 50% or decrease it by more than 20% from average. The normalized fuel consumption deviation from average as a function of population percentile was found to be largely insensitive to powertrain. However, the traits of ideal driving behavior are a function of powertrain. In conventional vehicles, kinetic losses dominate rolling resistance and aerodynamic losses. In xEVs with regenerative braking, rolling resistance and aerodynamic losses dominate. The relation of fuel consumption predicted from real-world drive data to that predicted by the industry-standard HWFET, UDDS, LA92, and US06 drive cycles was not consistent across powertrains, and varied broadly from the mean, median, and mode of real-world driving. A drive cycle synthesized by NREL's DRIVE tool accurately and consistently reproduces average real-world for multiple powertrains within 1%, and can be used to calculate the fuel consumption effects of varying levels of driver aggression.
Date:
May 1, 2013
Creator:
Neubauer, J. & Wood, E.
Object Type:
Presentation
System:
The UNT Digital Library
Accreditation Facilitation Projects: Supporting High Quality Early Childhood Education and Care
High-quality early childhood education and care (ECEC) are linked to positive developmental outcomes for children. Systems have been created to define, measure and promote high-quality ECEC. National accreditation status is deemed the gold standard of a high-quality program, yet many centers are unable to achieve this without assistance. With the help of Accreditation Facilitation Projects (AFPs), many low-income centers are able to achieve accreditation. Centers collaborating with an AFP reap many benefits including financial support, ongoing training and mentoring, and guidance through the accreditation process. AFPs invest greatly in the centers they collaborate with and the longer the center takes to achieve accreditation, the more resources an AFP must expend. The purposes of this study were to understand if the educational level of center director, the total enrollment of a center, or the percentage of children receiving government subsidies could predict the time it takes for a center to complete the accreditation process while receiving assistance from an AFP, and to determine if there are differences in attitudes about program accreditation between center directors and early learning specialists who serve as accreditation mentors to the directors. Findings revealed that a) the higher educational level of program directors is associated with …
Date:
May 2013
Creator:
Reinke, Stephanie L.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Acoustic Telemetry Evaluation of Juvenile Salmonid Passage and Survival at John Day Dam, 2010
This report presents survival, behavioral, and fish passage results for yearling and subyearling Chinook salmon smolts and juvenile steelhead tagged with JSATS acoustic micro-transmitters as part of a survival study conducted at John Day Dam during 2010. This study was designed to evaluate the passage and survival of yearling and subyearling Chinook salmon and juvenile steelhead to assist managers in identifying dam operations for compliance testing as stipulated by the 2008 Federal Columbia River Power System Biological Opinion and the 2008 Columbia Basin Fish Accords. Survival estimates were based on a single-release survival estimate model.
Date:
May 1, 2013
Creator:
Weiland, Mark A.; Woodley, Christa M.; Ploskey, Gene R.; Hughes, James S.; Kim, Jin A.; Deng, Zhiqun et al.
Object Type:
Report
System:
The UNT Digital Library
Adapting on the Plains: the United States Army's Evolution of Mobile Warfare in Texas, 1848-1859
The Army, despite having been vexed for a century on how to effectively fight the Plains Indians, ultimately defeated them only a decade after the Civil War. This thesis will bring to the forefront those individuals who adapted fighting techniques and ultimately achieved victories on the Texas frontier before the Civil War. The majority of these victories came as a result of mounted warfare under the direction of lower ranking officers in control of smaller forces. The tactic of fighting Indians from horseback was shown to be effective by the Rangers and later emulated by the Army.
Date:
May 2013
Creator:
Buchy, Mark B.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Addressing the Impact of Temperature Extremes on Large Format Li-Ion Batteries for Vehicle Applications
This presentation discusses the effects of temperature on large format lithium-ion batteries in electric drive vehicles.
Date:
May 1, 2013
Creator:
Pesaran, A.; Santhanagopalan, S. & Kim, G. H.
Object Type:
Presentation
System:
The UNT Digital Library
Advanced Post-Irradiation Examination Capability T
This report describes the current status of the Ad
Date:
May 1, 2013
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced Thermal Storage System with Novel Molten Salt: December 8, 2011 - April 30, 2013
Final technical progress report of Halotechnics Subcontract No. NEU-2-11979-01. Halotechnics has demonstrated an advanced thermal energy storage system with a novel molten salt operating at 700 degrees C. The molten salt and storage system will enable the use of advanced power cycles such as supercritical steam and supercritical carbon dioxide in next generation CSP plants. The salt consists of low cost, earth abundant materials.
Date:
May 1, 2013
Creator:
Jonemann, M.
Object Type:
Report
System:
The UNT Digital Library
Aging Is a Determinant in Anoxia Stress Tolerance in Caenorhabditis Elegans
Oxygen availability is critical for survival for most organisms. The nematode, C. elegans, has been useful for studying genetic regulation of anoxia tolerance due to the oxygen deprivation response mechanisms shared with other metazoans. Studies examining long-term anoxia (72h, LTA) tolerance have only been conducted at adult day 1. To investigate the effect of aging on anoxia tolerance wild-type and mutant strains were exposed to LTA between adult day 1 and day 9. Wild-type isolates and daf-16(mu86) (FOXO transcription factor regulated by insulin-signaling) and aak-2(gt33) (catalytic subunit of AMP-activated protein kinase) strains were anoxia sensitive at day 1 and displayed increased LTA tolerance with aging correlated with reproductive senescence followed by a decline in survivorhsip through day 9. The daf-2(e1370) (insulin receptor homologue of C. elegans), glp-1(e2141) (a lin-12/Notch receptor) and fog-2(q71) (required for spermatogenesis) strains were LTA-tolerant through day 5. I conclude that aging influences LTA-tolerance in a strain- and age-dependent manner. In addition to being LTA-tolerant the daf-2(e1370) and glp-1(e2141) strains have a longevity phenotype that is suppressed by loss of kri-1 or daf-12. While loss of kri-1 did not suppress the LTA-tolerant phenotype of glp-1(e2141) at day 1 the portion of impaired survivors increased at day 3 …
Date:
May 2013
Creator:
Goy, Jo M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Agriculture-Based Biofuels: Overview and Emerging Issues
This report reviews the evolution of the U.S. biofuels sector and the role that federal policy has played in shaping its development. In addition, it highlights emerging issues that are critical to the biofuels sector and of relevance to Congress.
Date:
May 1, 2013
Creator:
Schnepf, Randy
Object Type:
Report
System:
The UNT Digital Library
ALGORITHMS FOR THERMAL AND MECHANICAL CONTACT IN N
The transfer of heat and force from UO2 pellets to
Date:
May 1, 2013
Creator:
Hales, J. D.; Andrs, D. & Gaston, D. R.
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 113, No. 237, Ed. 1 Wednesday, May 1, 2013
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 1, 2013
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Analysis of High-Penetration Levels of Photovoltaics into the Distribution Grid on Oahu, Hawaii: Detailed Analysis of HECO Feeder WF1
Renewable generation is growing at a rapid rate due to the incentives available and the aggressive renewable portfolio standard targets implemented by state governments. Distributed generation in particular is seeing the fastest growth among renewable energy projects, and is directly related to the incentives. Hawaii has the highest electricity costs in the country due to the high percentage of oil burning steam generation, and therefore has some of the highest penetration of distributed PV in the nation. The High Penetration PV project on Oahu aims to understand the effects of high penetration PV on the distribution level, to identify penetration levels creating disturbances on the circuit, and to offer mitigating solutions based on model results. Power flow models are validated using data collected from solar resources and load monitors deployed throughout the circuit. Existing interconnection methods and standards are evaluated in these emerging high penetration scenarios. A key finding is a shift in the level of detail to be considered and moving away from steady-state peak time analysis towards dynamic and time varying simulations. Each level of normal interconnection study is evaluated and enhanced to a new level of detail, allowing full understanding of each issue.
Date:
May 1, 2013
Creator:
Stewart, E.; MacPherson, J.; Vasilic, S.; Nakafuji, D. & Aukai, T.
Object Type:
Report
System:
The UNT Digital Library
An Analysis of Pitch Organization in Villa-lobos's Rudepoêma
Heitor Villa-Lobos (1887-1959) stands central to the music history of the Brazilian twentieth century. His music represents a synthesis of the European art influences he absorbed and his quest to find a true Brazilian identity, which was not rooted in the deliberate imitation of Brazilian folk elements, but rather in the natural assimilation of them in his compositional style. His early compositions embody strong post-romantic, impressionistic tendencies, especially in regard to their harmonies and use of tone color, whereas the works from the 1920's and onwards show Villa-Lobos increasingly asserting his unusual and strong voice. Villa-Lobos's large-scale composition for piano, Rudepoêma, was composed between 1921 and 1926, and stands as one of the most significant contributions to the Latin-American piano literature. Despite of its importance in Villa-Lobos's oeuvre, it has largely eluded analytical attention. Discourse on Villa-Lobos is often marked by a somewhat one-dimensional approach that identifies the folk and rhythmic elements as the most important characteristics of his compositional style, and displays a certain reticence with regard to in-depth analysis of other parameters of his works. This study redresses the imbalance in the general approach to analytical assessment of Villa-Lobos's oeuvre by illustrating that pitch organization plays an indispensable …
Date:
May 2013
Creator:
Kruger, Esthea
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Analytical Model of Cold-formed Steel Framed Shear Wall with Steel Sheet and Wood-based Sheathing
The cold-formed steel framed shear walls with steel sheets and wood-based sheathing are both code approved lateral force resisting system in light-framed construction. In the United States, the current design approach for cold-formed steel shear walls is capacity-based and developed from full-scale tests. The available design provisions provide nominal shear strength for only limited wall configurations. This research focused on the development of analytical models of cold-formed steel framed shear walls with steel sheet and wood-based sheathing to predict the nominal shear strength of the walls at their ultimate capacity level. Effective strip model was developed to predict the nominal shear strength of cold-formed steel framed steel sheet shear walls. The proposed design approach is based on a tension field action of the sheathing, shear capacity of sheathing-to-framing fastener connections, fastener spacing, wall aspect ratio, and material properties. A total of 142 full scale test data was used to verify the proposed design method and the supporting design equations. The proposed design approach shows consistent agreement with the test results and the AISI published nominal strength values. Simplified nominal strength model was developed to predict the nominal shear strength of cold-formed steel framed wood-based panel shear walls. The nominal shear …
Date:
May 2013
Creator:
Yanagi, Noritsugu
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Ancillary Services in the United States: Independent System Operator (ISO) Perspective
The presentation provides an overview of how increasing penetrations of variable renewable energy on the electricity grid are impacting ancillary services markets in the United States.
Date:
May 1, 2013
Creator:
Cochran, J.
Object Type:
Presentation
System:
The UNT Digital Library
Application of Wear-Resistant, NanoComposite Coatings Produced from Iron-Based Glassy Powders
This report talks about Application of Wear-Resistant, NanoComposite Coatings Produced from Iron-Based Glassy Powders.
Date:
May 1, 2013
Creator:
Peter, William H.; Dehoff, Ryan R.; Blau, Peter Julian; Yamamoto, Yukinori; Chen, Wei; Sabau, Adrian S. et al.
Object Type:
Report
System:
The UNT Digital Library
ARRA Material Handling Equipment Composite Data Products: Data Through Quarter 4 of 2012
This presentation from the U.S. Department of Energy's National Renewable Energy Laboratory includes American Recovery and Reinvestment Act (ARRA) fuel cell material handling equipment composite data products for data through the fourth quarter of 2012.
Date:
May 1, 2013
Creator:
Kurtz, J.; Sprik, S.; Ainscough, C.; Saur, G.; Post, M.; Peters, M. et al.
Object Type:
Report
System:
The UNT Digital Library
Arvo Pärt and Three Types of His Tintinnabuli Technique
Arvo Pärt, an Estonian composer, was born in 1935. Most of the works at the beginning of his career were for piano in the neo-classical style. After that, he turned his interest to serial music and continued creating works with serial techniques throughout the 1960s. After his "self-imposed silence" period (during the years 1968-1976), Pärt emerged with a new musical style, which he called tintinnabuli. Although, this technique was influenced by music from the medieval period, the texture and function of its musical style cannot be described easily in terms of any single musical technique of the past. This study explores the evolution of Arvo Pärt's tintinnabuli technique in its first decade 1976-1985, which is divided into three different types. It provides musical examples from the scores of selected works, Für Alina, Cantus in Memory of Benjamin Britten, Cantate Domino canticum novum, Missa Sillabica, Stabat Mater and Es sang vor langen Jahren, and their analyses with supporting interpretative sketches. The goal of this thesis is to provide the reader a basis for understanding and recognizing the different types of Pärt's tintinnabuli technique.
Date:
May 2013
Creator:
Kongwattananon, Oranit
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Assessing the Role of Smaller Format Retailers on the Food Desert Landscape in Dallas, Texas
Many policy and business decisions regarding food deserts in the U.S. are based on the United States Department of Agriculture (USDA) definition of a food desert. This definition only includes large/national chain grocery retailers, based on the assumption that these major retailers are the only affordable sources of food contributing to balanced diets. As alternative distribution channels, including smaller stores, start to include groceries in their product offering, the need to consider the role of other businesses in the food retailing environment should be addressed. This thesis assesses the role of smaller format grocery retailers (small local grocers, convenience stores, gas stations, dollar stores, and drug stores) in shaping the food desert landscape in Dallas, Texas. The analysis evaluates the products offered in these stores, and then identifies the difference these stores make when included in the USDA analysis. This was done by collecting in-store data to determine the variety of products offered, the affordability of those products, and the overall healthfulness of the store. In addition, the gaps in supply and demand were identified in the USDA-defined food deserts in order to identify the impact any smaller format retailer may have. The findings suggest that, overall, smaller format retailers …
Date:
May 2013
Creator:
Regan, Amanda D.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library