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A Brief Literature Overview of Various Routes to Biorenewable Fuels from Lipids for the National Alliance for Advanced Biofuels and Bio-products (NAABB) Consortium (open access)

A Brief Literature Overview of Various Routes to Biorenewable Fuels from Lipids for the National Alliance for Advanced Biofuels and Bio-products (NAABB) Consortium

Renewable methods of producing transportation fuels are currently the focus of numerous large research efforts across the globe. Renewable fuel produced from algal lipids is one aspect of this research that could have profound implications on future transportation fuel requirements. However, technical challenges remain in several areas of algal-lipid-based fuels. These challenges include the identification and development of robust and productive algal species as well as extraction methods to recover the produced lipids. Not the least of these technical challenges is the conversion of the algae lipids to fungible fuels. This brief literature review focuses primarily on state-of-the-art “downstream” applications of producing fuel from fats and lipids, which can be applied to ongoing research with algae-derived lipids.
Date: March 29, 2011
Creator: Albrecht, Karl O. & Hallen, Richard T.
Object Type: Report
System: The UNT Digital Library
TOWARD AN IMPROVED UNDERSTANDING OF STRUCTURE AND MAGNETISM IN NEPTUNIUM AND PLUTONIUM PHOSPHONATES AND SULFONATES (open access)

TOWARD AN IMPROVED UNDERSTANDING OF STRUCTURE AND MAGNETISM IN NEPTUNIUM AND PLUTONIUM PHOSPHONATES AND SULFONATES

This grant supported the exploratory synthesis of new actinide materials with all of the actinides from thorium to californium with the exceptions of protactinium and berkelium. We developed detailed structure-property relationships that allowed for the identification of novel materials with selective ion-exchange, selective oxidation, and long-range magnetic ordering. We found novel bonding motifs and identified periodic trends across the actinide series. We identified structural building units that would lead to desired structural features and novel topologies. We also characterized many different spectroscopic trends across the actinide series. The grant support the preparation of approximately 1200 new compounds all of which were structurally characterized.
Date: March 1, 2012
Creator: Albrecht-Schmitt, Thomas
Object Type: Text
System: The UNT Digital Library
The Colony Courier-Leader (The Colony, Tex.), Vol. 33, No. 8, Ed. 1 Sunday, March 23, 2014 (open access)

The Colony Courier-Leader (The Colony, Tex.), Vol. 33, No. 8, Ed. 1 Sunday, March 23, 2014

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date: March 23, 2014
Creator: Aldaz, Gina
Object Type: Newspaper
System: The Portal to Texas History
The Colony Courier-Leader (The Colony, Tex.), Vol. 33, No. 9, Ed. 1 Sunday, March 30, 2014 (open access)

The Colony Courier-Leader (The Colony, Tex.), Vol. 33, No. 9, Ed. 1 Sunday, March 30, 2014

Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date: March 30, 2014
Creator: Aldaz, Gina
Object Type: Newspaper
System: The Portal to Texas History

Brown bag on iConference - 2013

This presentation was created for a brown bag luncheon about the 2013 iConference. It includes discussion on participants, the venues, programs, the role of the UNT Libraries, and reflections on the event.
Date: March 5, 2013
Creator: Alemneh, Daniel Gelaw
Object Type: Presentation
System: The UNT Digital Library
Metadata for ETD Lifecycle Management (open access)

Metadata for ETD Lifecycle Management

Chapter from Guidance Documents for Lifecycle Management of ETDs. This chapter describes the roles of metadata in facilitating the ETD lifecycle, methods to capture metadata manually and automatically, examples of programs using metadata to enhance ETD access, and strategies to manage metadata over time.
Date: March 21, 2014
Creator: Alemneh, Daniel Gelaw
Object Type: Book Chapter
System: The UNT Digital Library

Assessing the Usage of Electronic Theses and Dissertations: An Overview of ETD Statistics and Metrics in the UNT Libraries

Presentation for the 2011 Texas Electronic Thesis and Dissertations (ETDs) Association Annual Conference. This presentation gives an overview of ETD statistics and metrics in the UNT Libraries.
Date: March 31, 2011
Creator: Alemneh, Daniel Gelaw & Phillips, Mark Edward
Object Type: Presentation
System: The UNT Digital Library

Metadata versus Full-Text: Tracking Users’ Electronic Theses and Dissertations (ETDs) Seeking Behavior

Presentation for the 2018 iConference. This presentation provides data from a recent research project at the University of North Texas (UNT) Libraries to better understand how users are discovering electronic theses and dissertations (ETDs) in the UNT Libraries.
Date: March 26, 2018
Creator: Alemneh, Daniel Gelaw & Phillips, Mark Edward
Object Type: Presentation
System: The UNT Digital Library

Harnessing Social Media for Promoting Tourism in Africa: An Exploratory Analysis of Tweets

Poster presented at iConference 2016
Date: March 2016
Creator: Alemneh, Daniel Gelaw; Assefa, Shimelis & Rorissa, Abebe
Object Type: Poster
System: The UNT Digital Library
Harnessing Social Media for Promoting Tourism in Africa:  An Exploratory Analysis of Tweets (open access)

Harnessing Social Media for Promoting Tourism in Africa: An Exploratory Analysis of Tweets

This paper investigates the nature of tweets about African cultural heritage and potential strategies for tourism stakeholders.
Date: March 2016
Creator: Alemneh, Daniel Gelaw; Assefa, Shimelis & Rorissa, Abebe
Object Type: Paper
System: The UNT Digital Library
Guidance Documents for Lifecycle  Management of ETDs (open access)

Guidance Documents for Lifecycle Management of ETDs

In 2011, a research team led by the University of North Texas, the Educopia Institute/MetaArchive Cooperative, and the worldwide Networked Digital Library of Theses and Dissertations (NDLTD), began studying the production, dissemination, and preservation of Electronic Theses and Dissertations (ETDs). The original intent was to develop and disseminate documentation for academic libraries that would help curators better understand and address the preservation challenges presented by these new digital collections. As researchers from the libraries of University of North Texas, Virginia Tech, Rice University, Boston College, Indiana State University, Penn State, and the University of Arizona began to grapple with ETD lifecycle management issues, they quickly realized that librarians were but one of many academic stakeholder groups that work collaboratively to produce and maintain ETD collections. Studying the library role in isolation was neither feasible nor helpful. The scope of our work increased to encompass the roles and responsibilities of core stakeholders in the ETD lifecycle: students, faculty, administrators, technologists, commercial vendors, and librarians. The resulting Guidance Documents address areas of interest to ETD program planners, managers, and curators. They will help this extended set of stakeholders understand, document, and address the administrative, legal, and technical challenges presented by ETDs—from submission …
Date: March 19, 2014
Creator: Alemneh, Daniel Gelaw; Donovan, Bill; Halbert, Martin; Han, Yan; Henry, Geneva; Hswe, Patricia et al.
Object Type: Book
System: The UNT Digital Library
Performance of the new EBIS preinjector (open access)

Performance of the new EBIS preinjector

The construction and initial commissioning phase of a new heavy ion preinjector was completed at Brookhaven in September, 2010, and the preinjector is now operational. This preinjector, using an EBIS source to produce high charge state heavy ions, provided helium and neon ion beams for use at the NASA Space Radiation Laboratory in the Fall of 2010, and gold and uranium beams are being commissioned during the 2011 run cycle for use in RHIC. The EBIS operates with an electron beam current of up to 10 A, to produce mA level currents in 10-40 {micro}s beam pulses. The source is followed by an RFQ and IH linac to accelerate ions with q/m > 0.16 to an energy of 2 MeV/amu, for injection into the Booster synchrotron. The performance of the preinjector is presented, including initial operational experience for the NASA and RHIC programs.
Date: March 28, 2011
Creator: Alessi, J.; Beebe, E.; Binello, S.; Gardner, C.; Gould, O.; Hoff, L. et al.
Object Type: Article
System: The UNT Digital Library
Chromaticity correction for a muon collider optics (open access)

Chromaticity correction for a muon collider optics

Muon Collider (MC) is a promising candidate for the next energy frontier machine. However, in order to obtain peak luminosity in the 10{sup 34} cm{sup 2}s{sup -1} range the collider lattice designmust satisfy a number of stringent requirements. In particular the expected large momentum spread of the muon beam and the very small {beta}* call for a careful correction of the chromatic effects. Here we present a particular solution for the interaction region (IR) optics whose distinctive feature is a three-sextupole local chromatic correction scheme. The scheme may be applied to other future machines where chromatic effects are expected to be large. The expected large muon energy spread requires the optics to be stable over a wide range of momenta whereas the required luminosity calls for {beta}* in the mm range. To avoid luminosity degradation due to hour-glass effect, the bunch length must be comparatively small. To keep the needed RF voltage within feasible limits the momentum compaction factor must be small over the wide range of momenta. A low {beta}* means high sensitivity to alignment and field errors of the Interaction Region (IR) quadrupoles and large chromatic effects which limit the momentum range of optics stability and require strong …
Date: March 1, 2011
Creator: Alexahin, Y.; Gianfelice-Wendt, E.; Kapin, V. & /Fermilab
Object Type: Article
System: The UNT Digital Library

Six-Shooters and Shifting Sands: The Wild West Life of Texas Ranger Captain Frank Jones

Access: Use of this item is restricted to the UNT Community
Many well-read students, historians, and loyal aficionados of Texas Ranger lore know the name of Texas Ranger Captain Frank Jones (1856-1893), who died on the Texas-Mexico border in a shootout with Mexican rustlers. In Six-Shooters and Shifting Sands, Bob Alexander has now penned the first full-length biography of this important nineteenth-century Texas Ranger. At an early age Frank Jones, a native Texan, would become a Frontier Battalion era Ranger. His enlistment with the Rangers coincided with their transition from Indian fighters to lawmen. While serving in the Frontier Battalion officers' corps of Company D, Frank Jones supervised three of the four “great” captains of that era: J.A. Brooks, John H. Rogers, and John R. Hughes. Besides Austin Ira Aten and his younger brothers Calvin Grant Aten and Edwin Dunlap Aten, Captain Jones also managed law enforcement activities of numerous other noteworthy Rangers, such as Philip Cuney "P.C." Baird, Benjamin Dennis Lindsey, Bazzell Lamar "Baz" Outlaw, J. Walter Durbin, Jim King, Frank Schmid, and Charley Fusselman, to name just a few. Frank Jones’ law enforcing life was anything but boring. Not only would he find himself dodging bullets and returning fire, but those Rangers under his supervision would also experience gunplay. …
Date: March 2015
Creator: Alexander, Bob
Object Type: Book
System: The UNT Digital Library
A Multifaceted Mathematical Approach for Complex Systems (open access)

A Multifaceted Mathematical Approach for Complex Systems

Applied mathematics has an important role to play in developing the tools needed for the analysis, simulation, and optimization of complex problems. These efforts require the development of the mathematical foundations for scientific discovery, engineering design, and risk analysis based on a sound integrated approach for the understanding of complex systems. However, maximizing the impact of applied mathematics on these challenges requires a novel perspective on approaching the mathematical enterprise. Previous reports that have surveyed the DOE's research needs in applied mathematics have played a key role in defining research directions with the community. Although these reports have had significant impact, accurately assessing current research needs requires an evaluation of today's challenges against the backdrop of recent advances in applied mathematics and computing. To address these needs, the DOE Applied Mathematics Program sponsored a Workshop for Mathematics for the Analysis, Simulation and Optimization of Complex Systems on September 13-14, 2011. The workshop had approximately 50 participants from both the national labs and academia. The goal of the workshop was to identify new research areas in applied mathematics that will complement and enhance the existing DOE ASCR Applied Mathematics Program efforts that are needed to address problems associated with complex systems. …
Date: March 7, 2012
Creator: Alexander, F.; Anitescu, M.; Bell, J.; Brown, D.; Ferris, M.; Luskin, M. et al.
Object Type: Report
System: The UNT Digital Library
Administrative Appeals in the Bureau of Land Management and the Forest Service (open access)

Administrative Appeals in the Bureau of Land Management and the Forest Service

This report describes Congressional interest in the Bureau of Land Management's (BLM) appeal process due to rumors that it affects the BLM's capacity to handle various resources. Moreover, the report defines what an administrative appeal is, and describes the process required to undertake one. The report also lists the various types of administrative appeals.
Date: March 28, 2012
Creator: Alexander, Katrina
Object Type: Report
System: The UNT Digital Library
The 2010 Oil Spill: MMS/BOEMRE and NEPA (open access)

The 2010 Oil Spill: MMS/BOEMRE and NEPA

This report reviews the environmental procedures required following the explosion of an oil well on a tract leased by BP from the federal government.
Date: March 2, 2011
Creator: Alexander, Kristina
Object Type: Report
System: The UNT Digital Library
Biological Opinions for the Sacramento-San Joaquin Delta: A Case Law Summary (open access)

Biological Opinions for the Sacramento-San Joaquin Delta: A Case Law Summary

This report is a Case Law Summary about Biological Opinions for the Sacramento-San Joaquin Delta.
Date: March 13, 2014
Creator: Alexander, Kristina
Object Type: Report
System: The UNT Digital Library
The Gray Wolf and the Endangered Species Act: A Brief Legal History (open access)

The Gray Wolf and the Endangered Species Act: A Brief Legal History

This report provides a brief history of the laws, regulations, and lawsuits related to the wolf's protected status.
Date: March 28, 2011
Creator: Alexander, Kristina
Object Type: Report
System: The UNT Digital Library
WindWaveFloat Final Report (open access)

WindWaveFloat Final Report

Principle Power Inc. and National Renewable Energy Lab (NREL) have completed a contract to assess the technical and economic feasibility of integrating wave energy converters into the WindFloat, resulting in a new concept called the WindWaveFloat (WWF). The concentration of several devices on one platform could offer a potential for both economic and operational advantages. Wind and wave energy converters can share the electrical cable and power transfer equipment to transport the electricity to shore. Access to multiple generation devices could be simplified, resulting in cost saving at the operational level. Overall capital costs may also be reduced, provided that the design of the foundation can be adapted to multiple devices with minimum modifications. Finally, the WindWaveFloat confers the ability to increase energy production from individual floating support structures, potentially leading to a reduction in levelized energy costs, an increase in the overall capacity factor, and greater stability of the electrical power delivered to the grid. The research conducted under this grant investigated the integration of several wave energy device types into the WindFloat platform. Several of the resulting system designs demonstrated technical feasibility, but the size and design constraints of the wave energy converters (technical and economic) make the …
Date: March 30, 2012
Creator: Alla Weinstein, Dominique Roddier, Kevin Banister
Object Type: Report
System: The UNT Digital Library
Quality Parameters and Chemical Analysis for Biodiesel Produced in the United States in 2011 (open access)

Quality Parameters and Chemical Analysis for Biodiesel Produced in the United States in 2011

Samples of biodiesel (B100) from producers and terminals in 2011were tested for critical properties: free and total glycerin, flash point, cloud point, oxidation stability, cold soak filterability, and metals. Failure rates for cold soak filterability and oxidation stability were below 5%. One sample failed flash point due to excess methanol. One sample failed oxidation stability and metal content. Overall, 95% of the samples from this survey met biodiesel quality specification ASTM D6751. In 2007, a sampling of B100 from production facilities showed that nearly 90% met D6751. In samples meeting D6751, calcium was found above the method detection limit in nearly half the samples. Feedstock analysis revealed half the biodiesel was produced from soy and half was from mixed feedstocks. The saturated fatty acid methyl ester concentration of the B100 was compared to the saturated monoglyceride concentration as a percent of total monoglyceride. The real-world correlation of these properties was very good. The results of liquid chromatograph measurement of monoglycerides were compared to ASTM D6751. Agreement between the two methods was good, particularly for total monoglycerides and unsaturated monoglycerides. Because only very low levels of saturated monoglycerides measured, the two methods had more variability, but the correlation was still acceptable.
Date: March 1, 2013
Creator: Alleman, T. L.; Fouts, L. & Chupka, G.
Object Type: Report
System: The UNT Digital Library
Research Reactor Preparations for the Air Shipment of Highly Enriched Uranium from Romania (open access)

Research Reactor Preparations for the Air Shipment of Highly Enriched Uranium from Romania

In June 2009 two air shipments transported both unirradiated (fresh) and irradiated (spent) Russian-origin highly enriched uranium (HEU) nuclear fuel from two research reactors in Romania to the Russian Federation for conversion to low enriched uranium. The Institute for Nuclear Research at Pitesti (SCN Pitesti) shipped 30.1 kg of HEU fresh fuel pellets to Dimitrovgrad, Russia and the Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH) shipped 23.7 kilograms of HEU spent fuel assemblies from the VVR S research reactor at Magurele, Romania, to Chelyabinsk, Russia. Both HEU shipments were coordinated by the Russian Research Reactor Fuel Return Program (RRRFR) as part of the U.S. Department of Energy Global Threat Reduction Initiative (GTRI), were managed in Romania by the National Commission for Nuclear Activities Control (CNCAN), and were conducted in cooperation with the Russian Federation State Corporation Rosatom and the International Atomic Energy Agency. Both shipments were transported by truck to and from respective commercial airports in Romania and the Russian Federation and stored at secure nuclear facilities in Russia until the material is converted into low enriched uranium. These shipments resulted in Romania becoming the 3rd country under the RRRFR program and the 14th country under the …
Date: March 1, 2010
Creator: Allen, K. J.; Bolshinsky, I.; Biro, L. L.; Budu, M. E.; Zamfir, N. V.; Dragusin, M. et al.
Object Type: Article
System: The UNT Digital Library

Student Recital: 2014-03-06 - Nicholas Allington, alto saxophone

A senior recital presented at the UNT College of Music Recital Hall.
Date: March 6, 2014
Creator: Allington, Nicholas
Object Type: Sound
System: The UNT Digital Library
Effect Of Oxidation On Chromium Leaching And Redox Capacity Of Slag-Containing Waste Forms (open access)

Effect Of Oxidation On Chromium Leaching And Redox Capacity Of Slag-Containing Waste Forms

The rate of oxidation is important to the long-term performance of reducing salt waste forms because the solubility of some contaminants, e.g., technetium, is a function of oxidation state. TcO{sub 4}{sup −} in the salt solution is reduced to Tc(IV) and has been shown to react with ingredients in the waste form to precipitate low solubility sulfide and/or oxide phases [Shuh, et al., 1994, Shuh, et al., 2000, Shuh, et al., 2003]. Upon exposure to oxygen, the compounds containing Tc(IV) oxidize to the pertechnetate ion, Tc(VII)O{sub 4}{sup −}, which is very soluble. Consequently the rate of technetium oxidation front advancement into a monolith and the technetium leaching profile as a function of depth from an exposed surface are important to waste form performance and ground water concentration predictions. An approach for measuring contaminant oxidation rate (effective contaminant specific oxidation rate) based on leaching of select contaminants of concern is described in this report. In addition, the relationship between reduction capacity and contaminant oxidation is addressed. Chromate was used as a non-radioactive surrogate for pertechnetate in simulated waste form samples. Depth discrete subsamples were cut from material exposed to Savannah River Site (SRS) ''field cured'' conditions. The subsamples were prepared and …
Date: March 1, 2013
Creator: Almond, P. M.; Stefanko, D. B. & Langton, C. A.
Object Type: Report
System: The UNT Digital Library