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A 4.2 GS/sec. Synchronized Vertical Excitation System for SPS Studies - Steps Toward Wideband Feedback
A 4.2 GS/sec. beam excitation system with accelerator synchronization and power stages is described. The system is capable of playing unique samples (32 samples/bunch) for 15,000 turns on selected bunch(es) in the SPS in syn- chronism with the injection and acceleration cycle. The purpose of the system is to excite internal modes of single-bunch vertical motion, and study the bunch dynamics in the presence of developing Electron cloud or TMCI effects. The system includes a synchronized master oscillator, SPS timing functions, an FPGA based arbitrary waveform generator, 4.2 GS/sec. D/A system and four 80W 20-1000 MHz amplifiers driving a tapered stripline pickup/kicker. A software GUI allows specification of various modulation signals, selection of bunches and turns to excite, while a remote control interface allows simple control/monitoring of the RF power stages located in the tunnel. The successful use of this system for SPS MD measurements in 2011 is a vital proof-of-principle for wideband feedback using similar functions to correct the beam motion.
Date:
July 10, 2012
Creator:
Fox, John
Object Type:
Article
System:
The UNT Digital Library
17 GHz High Gradient Accelerator Research
This is a report on the MIT High Gradient Accelerator Research program which has included: Operation of the 17 GHz, 25 MeV MIT/Haimson Research Corp. electron accelerator at MIT, the highest frequency, stand-alone accelerator in the world; collaboration with members of the US High Gradient Collaboration, including the design and test of novel structures at SLAC at 11.4 GHz; the design, construction and testing of photonic bandgap structures, including metallic and dielectric structures; the investigation of the wakefields in novel structures; and the training of the next generation of graduate students and postdoctoral associates in accelerator physics.
Date:
July 10, 2013
Creator:
Temkin, Richard J. & Shapiro, Michael A.
Object Type:
Report
System:
The UNT Digital Library
25 Year Lifetime for Flexible Buildings Integrated Photovoltaics
Although preliminary proof-of-principle of the efficacy of barrier materials and processes, first developed by Battelle at PNNL and commercialized by Vitex, has been demonstrated at the laboratory scale, there are several challenges to the practical commercial implementation of these developments in the Buildings Integrated Photovoltaics (BIPV) market. Two important issues that are addressed in this project are identifying a low cost substrate material that can survive in the outside environment (rain, heat, dust, hail, etc.) for 25 years and developing an encapsulation method for the photovoltaic (PV) cells that can meet the required barrier performance without driving the cost of the total barrier package out of range (remaining below $3.00/Wp). Without these solutions, current encapsulation technologies will limit the use of PV for BIPV applications. Flexible, light-weight packaging that can withstand 25 years in the field is required for a totally flexible integrated PV package. The benefit of this research is to make substantial progress in the development of a cost-effective, viable thin film barrier package which will be a critical enabling technology to meet the Solar America Initiative cost and device reliability goals, and to make photovoltaics (PV) more cost-competitive with electricity generated using fossil fuels. Increased PV installations …
Date:
July 10, 2010
Creator:
Gross, Mark E.
Object Type:
Report
System:
The UNT Digital Library
317/319 Phytoremediation site monitoring report - 2009 growing season : final report.
In 1999, Argonne National Laboratory (Argonne) designed and installed a series of engineered plantings consisting of a vegetative cover system and approximately 800 hybrid poplars and willows rooting at various predetermined depths. The plants were installed using various methods including Applied Natural Science's TreeWell{reg_sign} system. The goal of the installation was to protect downgradient surface and groundwater by intercepting the contaminated groundwater with the tree roots, removing moisture from the upgradient soil area, reducing water infiltration, preventing soil erosion, degrading and/or transpiring the residual volatile organic compounds (VOCs), and removing tritium from the subsoil and groundwater. This report presents the results of the monitoring activities conducted by Argonne's Energy Systems (ES) Division in the growing season of 2009. Monitoring of the planted trees began soon after the trees were installed in 1999 and has been conducted every summer since then. As the trees grew and consolidated their growth into the contaminated soil and groundwater, their exposure to the contaminants was progressively shown through tissue sampling. During the 2009 sampling campaign, VOC concentrations found in the French Drain area were in general consistent with or slightly lower than the 2008 results. Additionally, closely repeated, stand wide analyses showed contaminant fluctuations that …
Date:
February 10, 2010
Creator:
Negri, C .N.; Benda, P. L.; Gopalakrishnan, G. & Systems, Energy
Object Type:
Report
System:
The UNT Digital Library
401(K) Plans: Certain Investment Options and Practices That May Restrict Withdrawals Not Widely Understood
A letter report issued by the Government Accountability Office with an abstract that begins "401(k) plan sponsors are responsible for offering an array of appropriate investment options, and participants are responsible for directing their investments among those options. While participants expect to be able to switch investment options or withdraw money from their accounts, during the recent economic downturn, some 401(k) plan sponsors and participants found that they were restricted from doing so. GAO was asked to (1) identify some of the specific investments and practices that prevented plan sponsors and participants from accessing their 401(k) plan assets and (2) determine any changes the Department of Labor (Labor) could make to assist sponsors in understanding the challenges posed by the investments and practices that restricted withdrawals. To do this, GAO reviewed relevant federal laws and regulations and consulted with experts, federal officials, service providers, and plan sponsors."
Date:
March 10, 2011
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
501(c)(3)s and Campaign Activity: Analysis Under Tax and Campaign Finance Laws
From Summary: "This report examines the restrictions imposed on campaign activity by Section 501(c)(3) organizations under the tax and campaign finance laws."
Date:
September 10, 2013
Creator:
Lunder, Erika, L. & Whitaker, L. Paige
Object Type:
Report
System:
The UNT Digital Library
501(c)(4)s and the Gift Tax: Legal Analysis
This report discusses whether substantial donations to tax-exempt 501(c)(4) organizations are subject to the federal gift tax.
Date:
August 10, 2012
Creator:
Luckey, John R. & Lunder, Erika K.
Object Type:
Report
System:
The UNT Digital Library
[19th annual Christmas & Kwanzaa concert, tape 1 of 3]
Video recording from The Black Academy of Arts and Letters recorded during their 19th annual Christmas and Kwanzaa holiday concert in collaboration with local school choirs held on December 10th, 2011. The footage shows a large band seated in front of a mixed-gender student choir. The concert features students from 12 schools such as South Oak Cliff, Lincoln, Carter, and Kimball high schools with the Townview Big D Band.
Date:
December 10, 2011
Creator:
Ethley, Demetrius
Object Type:
Video
System:
The UNT Digital Library
[19th annual Christmas & Kwanzaa concert, tape 2 of 3]
Video recording from The Black Academy of Arts and Letters recorded during their 19th annual Christmas and Kwanzaa holiday concert in collaboration with local school choirs held on December 10th, 2011. The footage shows a large band seated in front of a mixed-gender student choir. The concert features students from 12 schools such as South Oak Cliff, Lincoln, Carter, and Kimball high schools with the Townview Big D Band.
Date:
December 10, 2011
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
[19th annual Christmas & Kwanzaa concert, tape 3 of 3]
Video recording from The Black Academy of Arts and Letters recorded during their 19th annual Christmas and Kwanzaa holiday concert in collaboration with local school choirs held on December 10th, 2011. The tape shows the dismissal of the students at the conclusion of the concert.
Date:
December 10, 2011
Creator:
unknown
Object Type:
Video
System:
The UNT Digital Library
2007 Estimated International Energy Flows
An energy flow chart or 'atlas' for 136 countries has been constructed from data maintained by the International Energy Agency (IEA) and estimates of energy use patterns for the year 2007. Approximately 490 exajoules (460 quadrillion BTU) of primary energy are used in aggregate by these countries each year. While the basic structure of the energy system is consistent from country to country, patterns of resource use and consumption vary. Energy can be visualized as it flows from resources (i.e. coal, petroleum, natural gas) through transformations such as electricity generation to end uses (i.e. residential, commercial, industrial, transportation). These flow patterns are visualized in this atlas of 136 country-level energy flow charts.
Date:
March 10, 2011
Creator:
Smith, C. A.; Belles, R. D. & Simon, A. J.
Object Type:
Report
System:
The UNT Digital Library
2010 Diffraction Methods in Structural Biology
Advances in basic methodologies have played a major role in the dramatic progress in macromolecular crystallography over the past decade, both in terms of overall productivity and in the increasing complexity of the systems being successfully tackled. The 2010 Gordon Research Conference on Diffraction Methods in Structural Biology will, as in the past, focus on the most recent developments in methodology, covering all aspects of the process from crystallization to model building and refinement, complemented by examples of structural highlights and complementary methods. Extensive discussion will be encouraged and it is hoped that all attendees will participate by giving oral or poster presentations, the latter using the excellent poster display area available at Bates College. The relatively small size and informal atmosphere of the meeting provides an excellent opportunity for all participants, especially younger scientists, to meet and exchange ideas with leading methods developers.
Date:
March 10, 2011
Creator:
Gonzalez, Ana
Object Type:
Article
System:
The UNT Digital Library
2011 Superconductivity Gordon Research Conference (June 5-10, 2011, Waterville Valley Resort, Waterville Valley, New Hampshire)
The 2011 Gordon Research Conference on Superconductivity will commemorate the 100th anniversary of the discovery of superconductivity by providing a forum for discussion of the latest experimental and theoretical advances in this field. The conference will bring together experts to address the current challenges in understanding correlated superconductors - from cuprates and pnictides to heavy fermion superconductors. The fundamental mechanisms of superconducting pairing, the underlying explanations for thermodynamic phase diagrams including potential importance of competing phases, the correspondence between these phenomena, and the transport and spectroscopic properties of these materials will be among the themes of the conference. We will also discuss the feasibility of using lessons learned from the study of known superconductors as a guide to the future discovery of novel and higher temperature superconductors. Speakers will be strongly encouraged to present new, unpublished work, which will ensure that discussions evoke and explore new research directions. The participation of young scientists at the graduate student or post-doctoral level will be encouraged by the offering of selected presentations, focused discussions with invited speakers, and poster sessions. In addition, the organizers have earmarked funds to facilitate attendance of members of groups underrepresented in science and engineering.
Date:
June 10, 2011
Creator:
Yazdani, Ali
Object Type:
Article
System:
The UNT Digital Library
2012 Annual Site Environmental Report
N/A
Date:
January 10, 2013
Creator:
M., Ratel K.; Pohlot, P.; Lee, R.; Williams, J.; Remien, J.; Green, T. et al.
Object Type:
Report
System:
The UNT Digital Library
2012 ELECTRON DONOR-ACCEPTOR INTERACTIONS GORDON RESEARCH CONFERENCE, AUGUST 5-10, 2012
The upcoming incarnation of the Gordon Research Conference on Electron Donor Acceptor Interactions will feature sessions on classic topics including proton-coupled electron transfer, dye-sensitized solar cells, and biological electron transfer, as well as emerging areas such as quantum coherence effects in donor-acceptor interactions, spintronics, and the application of donor-acceptor interactions in chemical synthesis.
Date:
August 10, 2012
Creator:
McCusker, James
Object Type:
Article
System:
The UNT Digital Library
2012 Farm Bill: Changing the Treatment of LIHEAP Receipt in the Calculation of SNAP Benefits
This report describes the contents of the 2012 Farm Bill, cost reducing measures in the Farm Bill, and the implications of both of these. Specifically, the report focuses on SNAP (Supplemental Nutrition Assistance Program) which is a cost saving measure that addresses how certain deductions from income will be calculated.
Date:
July 10, 2012
Creator:
Aussenberg, Randy Alison & Perl, Libby
Object Type:
Report
System:
The UNT Digital Library
2012 Molecular Basis of Microbial One-Carbon Metabolism Gordon Research Conferences and Gordon Research Seminar, August 4-10,2012
The 2012 Gordon Conference will present and discuss cutting-edge research in the field of microbial metabolism of C1 compounds. The conference will feature the roles and application of C1 metabolism in natural and synthetic systems at scales from molecules to ecosystems. The conference will stress molecular aspects of the unique metabolism exhibited by autotrophic bacteria, methanogens, methylotrophs, aerobic and anaerobic methanotrophs, and acetogens.
Date:
August 10, 2012
Creator:
Hanson, Thomas
Object Type:
Article
System:
The UNT Digital Library
2012 Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies
This Research is about Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies which presents a preliminary model of the three-dimensional seismic structure of the Iran region.
Date:
September 10, 2012
Creator:
Wetovsky, Marvin A.; Anderson, Dale; Arrowsmith, Stephen J.; Begnaud, Michael L.; Hartse, Hans E.; Maceira, Monica et al.
Object Type:
Article
System:
The UNT Digital Library
2012 PLANT CELL WALLS GORDON RESEARCH CONFERENCE AND GORDON RESEARCH SEMINAR, AUGUST 4-10, 2012
The sub-theme of this year’s meeting, ‘Cell Wall Research in a Post-Genome World’, will be a consideration of the dramatic technological changes that have occurred in the three years since the previous cell wall Gordon Conference in the area of DNA sequencing. New technologies are providing additional perspectives of plant cell wall biology across a rapidly growing number of species, highlighting a myriad of architectures, compositions, and functions in both "conventional" and specialized cell walls. This meeting will focus on addressing the knowledge gaps and technical challenges raised by such diversity, as well as our need to understand the underlying processes for critical applications such as crop improvement and bioenergy resource development.
Date:
August 10, 2012
Creator:
Rose, Jocelyn
Object Type:
Article
System:
The UNT Digital Library
2012 VIBRATIONAL SPECTROSCOPY GORDON RESEARCH CONFERENCE, AUGUST 5-10, 2012
The Vibrational Spectroscopy conference brings together experimentalists and theoreticians working at the frontiers of modern vibrational spectroscopy, with a special emphasis on spectroscopies that probe the structure and dynamics of molecules in gases, liquids, and at interfaces. The conference explores the wide range of state-of-the-art techniques based on vibrational motion. These techniques span the fields of time-domain, high-resolution frequency-domain, spatially-resolved, nonlinear, and multidimensional spectroscopies. The conference highlights both the application of these techniques in chemistry, materials, biology, the environment, and medicine as well as the development of theoretical models that enable one to connect spectroscopic signatures to underlying molecular motions including chemical reaction dynamics. The conference goal is to advance the field of vibrational spectroscopy by bringing together a collection of researchers who share common interests and who will gain from discussing work at the forefront of several connected areas. The intent is to emphasize the insights and understanding that studies of vibrations provide about a variety of molecular systems ranging from small polyatomic molecules to large biomolecules, nanomaterials, and environmental systems.
Date:
August 10, 2012
Creator:
Geiger, Franz
Object Type:
Article
System:
The UNT Digital Library
[2014 Clothesline Project display 1]
A photograph of of shirts on display for the Clothesline Project, meant to spread awareness about domestic violence and abuse as well as sexual assault. They are laid out on a flat board standing in the UNT Library Mall. There are several colors and each one is unique. The first row reads "HATRED is a very underestimated emotion", "--- STAND up 4 Me; Protect Me; Educate others; Advocate 4 Me; Know the signs; Understand it; Prevent It; Kim, Liz", Family should show [heart] Not Make It". The second row reads "STRENGTH [flower] COURAGE", "'People with CLENCHED fists can not SHAKE hands.' Indira Gandhi", and "Physical Pain is Temporary But the Pain You Cause Will Be With Me Forever, O. Garay, [U.S.A. flag]". The third row reads "bruises DON'T equal love. KEEP YOUR HANDS TO YOURSELF", "no more Silence; end the Violence", and "You're Not ALONE" with a drawing of a girl and a boy reaching out to each other and a teddy bear on it. The final row reads "Life is more than your situation Its the victories you've accomplished", "-strong survivor I will be" with happy faces drawn on, and "Be Strong. Speak OUT!" with hearts drawn on it.
Date:
April 10, 2014
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
[2014 Clothesline Project display 2]
A photograph of of shirts on display for the Clothesline Project, meant to spread awareness about domestic violence and abuse as well as sexual assault. They are laid out on a flat board standing in the UNT Library Mall. There are several colors and each one is unique. The first row reads "HATRED is a very underestimated emotion", "--- STAND up 4 Me; Protect Me; Educate others; Advocate 4 Me; Know the signs; Understand it; Prevent It; Kim, Liz", Family should show [heart] Not Make It". The second row reads "STRENGTH [flower] COURAGE", "'People with CLENCHED fists can not SHAKE hands.' Indira Gandhi", and "Physical Pain is Temporary But the Pain You Cause Will Be With Me Forever, O. Garay, [U.S.A. flag]". The third row reads "bruises DON'T equal love. KEEP YOUR HANDS TO YOURSELF", "no more Silence; end the Violence", and "You're Not ALONE" with a drawing of a girl and a boy reaching out to each other and a teddy bear on it. The final row reads "Life is more than your situation Its the victories you've accomplished", "-strong survivor I will be" with happy faces drawn on, and "Be Strong. Speak OUT!" with hearts drawn on it.
Date:
April 10, 2014
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
[2015 Homecoming Court, 2]
Photograph of the 2015 Homecoming Court riding on a float and waving to the crowd through downtown Denton, TX.
Date:
October 10, 2015
Creator:
Clark, Junebug
Object Type:
Photograph
System:
The UNT Digital Library
4w Thomson Scattering Probe for High-density Measurements at Titan
None
Date:
May 10, 2010
Creator:
Ross, J. S.; Kline, J. L.; Yang, S.; Henesian, M.; Weiland, T.; Price, D. et al.
Object Type:
Article
System:
The UNT Digital Library