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137
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134
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60
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38
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33
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Broadband Loan and Grant Programs in the USDA's Rural Utilities Service
This report discusses the broadband loan and grant programs at Rural Utilities Service (RUS) that is intended to accelerate the deployment of broadband services in rural America.
Date:
June 23, 2014
Creator:
Kruger, Lennard G.
Object Type:
Report
System:
The UNT Digital Library
Buggy-Top Retainer
Patent for a buggy top retainer designed to keep the top of a buggy stable as it is driving over rough terrain. Illustrations included.
Date:
June 23, 1908
Creator:
Allison, Robert L.
Object Type:
Patent
System:
The Portal to Texas History
"Bunker Busters": Robust Nuclear Earth Penetrator Issues, FY2005 and FY2006
The Robust Nuclear Earth Penetrator (RNEP) program has been the most controversial nuclear weapon program in Congress for the last several years. Supporters argue that it is needed to attack hard and deeply buried targets (such as leadership bunkers) in countries of concern, thereby deterring or defeating challenges from such nations; critics assert that RNEP would lower the threshold for use of nuclear weapons and prompt other nations to develop nuclear weapons to deter U.S. attack. This report presents a brief technical background on RNEP, then discusses the history of RNEP in Congress and the Administration for the FY2005 and FY2006 budget cycles.
Date:
June 23, 2005
Creator:
Medalia, Jonathan
Object Type:
Report
System:
The UNT Digital Library
CALDERON COKEMAKING PROCESS/DEMONSTRATION PROJECT
This project deals with the demonstration of a coking process using proprietary technology of Calderon, with the following objectives geared to facilitate commercialization: (1) making coke of such quality as to be suitable for use in hard-driving, large blast furnaces; (2) providing proof that such process is continuous and environmentally closed to prevent emissions; (3) demonstrating that high-coking-pressure (non-traditional) coal blends which cannot be safely charged into conventional by-product coke ovens can be used in the Calderon process; (4) conducting a blast furnace test to demonstrate the compatibility of the coke produced; and (5) demonstrating that coke can be produced economically, at a level competitive with coke imports. The activities of the past quarter were focused on the following: Detailed studies of LTV's site for the installation of the commercial Demonstration Unit with site specific layouts; Environmental Work; Firm commitments for funding from the private sector; and Federal funding to complement the private contribution.
Date:
June 23, 1999
Creator:
Calderon, Albert
Object Type:
Report
System:
The UNT Digital Library
California's Paid Family Leave Law: Lessons from the First Decade
This is a report covering California's paid family leave law during its first ten years.
Date:
June 23, 2014
Creator:
Bartel, Ann, Ph.D.; Baum, Charles, Ph.D.; Rossin-Slater, Maya, Ph.D.; Ruhm, Christopher, Ph.D. & Waldfogel, Jane, Ph.D.
Object Type:
Text
System:
The UNT Digital Library
California's Paid Family Leave Law-Lessons from the First Decade
This report looks at the first ten years of California's paid family leave law.
Date:
June 23, 2014
Creator:
Bartel, Ann, Ph.D.; Baum, Charles, Ph.D.; Rossin-Slater, Maya, Ph.D.; Ruhm, Christopher, Ph.D. & Waldfogel, Jane, Ph.D.
Object Type:
Text
System:
The UNT Digital Library
Calorimeter based detectors for high energy hadron colliders
The work was directed in two complementary directions, the D0 experiment at Fermilab, and the GEM detector for the SSC. Efforts have been towards the data taking and analysis with the newly commissioned D0 detector at Fermilab in the [bar p]p Collider run that started in May 1992 and ended on June 1, 1993. We involved running and calibration of the calorimeter and tracking chambers, the second level trigger development, and various parts of the data analysis, as well as studies for the D0 upgrade planned in the second half of this decade. Another major accomplishment was the delivery'' of the Technical Design Report for the GEM SSC detector. Efforts to the overall detector and magnet design, design of the facilities, installation studies, muon system coordination, muon chamber design and tests, muon system simulation studies, and physics simulation studies. In this document we describe these activities separately.
Date:
June 23, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Calorimeter based detectors for high energy hadron colliders. [Progress report]
The work was directed in two complementary directions, the D0 experiment at Fermilab, and the GEM detector for the SSC. Efforts have been towards the data taking and analysis with the newly commissioned D0 detector at Fermilab in the {bar p}p Collider run that started in May 1992 and ended on June 1, 1993. We involved running and calibration of the calorimeter and tracking chambers, the second level trigger development, and various parts of the data analysis, as well as studies for the D0 upgrade planned in the second half of this decade. Another major accomplishment was the ``delivery`` of the Technical Design Report for the GEM SSC detector. Efforts to the overall detector and magnet design, design of the facilities, installation studies, muon system coordination, muon chamber design and tests, muon system simulation studies, and physics simulation studies. In this document we describe these activities separately.
Date:
June 23, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Cancellation of spin and orbital magnetic moments in (delta)-Pu: theory
Density functional theory (DFT), in conjunction with the fixed-spin-moment (FSM) method, spin-orbit coupling (SO), and orbital polarization (OP), is shown to retain key features of the conventional DFT treatment of {delta}-Pu while at the same time not producing the substantial net magnetic moments commonly predicted by this theory. It is shown that when a small adjustment of the spin moment (less than 20%) is allowed, a complete spin- and orbital-moment cancellation occurs which results in a zero net magnetic moment in {delta}-Pu. This minor modification, accomplished by the FSM method, is shown to have a very small effect on the calculated total energy as well as the electron density-of-states (DOS). The photoemission spectra (PES), obtained from the DOS of the present model, compares equal or better to measured spectra, than that of two other recent non-magnetic models for {delta}-Pu.
Date:
June 23, 2006
Creator:
Soderlind, P
Object Type:
Article
System:
The UNT Digital Library
CANISTER TRANSFER SYSTEM DESCRIPTION DOCUMENT
The Canister Transfer System receives transportation casks containing large and small disposable canisters, unloads the canisters from the casks, stores the canisters as required, loads them into disposal containers (DCs), and prepares the empty casks for re-shipment. Cask unloading begins with cask inspection, sampling, and lid bolt removal operations. The cask lids are removed and the canisters are unloaded. Small canisters are loaded directly into a DC, or are stored until enough canisters are available to fill a DC. Large canisters are loaded directly into a DC. Transportation casks and related components are decontaminated as required, and empty casks are prepared for re-shipment. One independent, remotely operated canister transfer line is provided in the Waste Handling Building System. The canister transfer line consists of a Cask Transport System, Cask Preparation System, Canister Handling System, Disposal Container Transport System, an off-normal canister handling cell with a transfer tunnel connecting the two cells, and Control and Tracking System. The Canister Transfer System operating sequence begins with moving transportation casks to the cask preparation area with the Cask Transport System. The Cask Preparation System prepares the cask for unloading and consists of cask preparation manipulator, cask inspection and sampling equipment, and decontamination equipment. …
Date:
June 23, 2000
Creator:
Gorpani, B.
Object Type:
Report
System:
The UNT Digital Library
Cannon AFB - LTR ICO: Len J. Santi
Government leader ruling on base closures.
Date:
June 23, 2005
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Carboxysomal carbonic anhydrases: Structure and role in microbial CO2 fixation
Cyanobacteria and some chemoautotrophic bacteria are able to grow in environments with limiting CO2 concentrations by employing a CO2-concentrating mechanism (CCM) that allows them to accumulate inorganic carbon in their cytoplasm to concentrations several orders of magnitude higher than that on the outside. The final step of this process takes place in polyhedral protein microcompartments known as carboxysomes, which contain the majority of the CO2-fixing enzyme, RubisCO. The efficiency of CO2 fixation by the sequestered RubisCO is enhanced by co-localization with a specialized carbonic anhydrase that catalyzes dehydration of the cytoplasmic bicarbonate and ensures saturation of RubisCO with its substrate, CO2. There are two genetically distinct carboxysome types that differ in their protein composition and in the carbonic anhydrase(s) they employ. Here we review the existing information concerning the genomics, structure and enzymology of these uniquely adapted carbonic anhydrases, which are of fundamental importance in the global carbon cycle.
Date:
June 23, 2010
Creator:
Cannon, Gordon C.; Heinhorst, Sabine & Kerfeld, Cheryl A.
Object Type:
Article
System:
The UNT Digital Library
The Carboxysome and Other Bacterial Microcompartments
- Carboxysomes are part of the carbon concentrating mechanism in cyanobacteria and chemoautotrophs. - Carboxysomes are a subclass of bacterial microcompartments (BMCs); BMCs can encapsulate a range of metabolic processes. - Like some viral particles, the carboxysome can be modeled as an icosahedron-in its case, having 4,000-5,000 hexameric shell subunits and 12 surface pentamers to generate curvature. - The threefold axis of symmetry of the CsoS1D protein in carboxysomes forms a pore that can open and close, allowing for selective diffusion. - Genetic modules encoding BMC shell proteins and the enzymes that they encapsulate are horizontally transferable, suggesting they enable bacteria to adapt to diverse environments.
Date:
June 23, 2010
Creator:
Kerfeld, Cheryl A.; Greenleaf, William B. & Kinney, James N.
Object Type:
Article
System:
The UNT Digital Library
CARRIER/CASK HANDLING SYSTEM DESCRIPTION DOCUMENT
The Carrier/Cask Handling System receives casks on railcars and legal-weight trucks (LWTs) (transporters) that transport loaded casks and empty overpacks to the Monitored Geologic Repository (MGR) from the Carrier/Cask Transport System. Casks that come to the MGR on heavy-haul trucks (HHTs) are transferred onto railcars before being brought into the Carrier/Cask Handling System. The system is the interfacing system between the railcars and LWTs and the Assembly Transfer System (ATS) and Canister Transfer System (CTS). The Carrier/Cask Handling System removes loaded casks from the cask transporters and transfers the casks to a transfer cart for either the ATS or CTS, as appropriate, based on cask contents. The Carrier/Cask Handling System receives the returned empty casks from the ATS and CTS and mounts the casks back onto the transporters for reshipment. If necessary, the Carrier/Cask Handling System can also mount loaded casks back onto the transporters and remove empty casks from the transporters. The Carrier/Cask Handling System receives overpacks from the ATS loaded with canisters that have been cut open and emptied and mounts the overpacks back onto the transporters for disposal. If necessary, the Carrier/Cask Handling System can also mount empty overpacks back onto the transporters and remove loaded overpacks …
Date:
June 23, 2000
Creator:
Loros, E.F.
Object Type:
Report
System:
The UNT Digital Library
Caustic Treatment of Zircon in the Preparation of Pure Zirconium Compounds
From abstract: This investigation was conducted in order to develop a process whereby the most abundant zirconium ore, namely zircon, could economically be put into solution and purified adequately for use in hafnium separation processes employing liquid-liquid extraction. Secondary aims concerned the preparation of pure zirconyl chloride, zirconyl nitrate, zirconyl sulfate, and zirconium oxide from the zircon ore.
Date:
June 23, 1953
Creator:
Spink, Donald R. & Wilhelm, Harley A.
Object Type:
Report
System:
The UNT Digital Library
The CDF silicon vertex trigger
The CDF experiment's Silicon Vertex Trigger is a system of 150 custom 9U VME boards that reconstructs axial tracks in the CDF silicon strip detector in a 15 {mu}sec pipeline. SVT's 35 {mu}m impact parameter resolution enables CDF's Level 2 trigger to distinguish primary and secondary particles, and hence to collect large samples of hadronic bottom and charm decays. We review some of SVT's key design features. Speed is achieved with custom VLSI pattern recognition, linearized track fitting, pipelining, and parallel processing. Testing and reliability are aided by built-in logic state analysis and test-data sourcing at each board's input and output, a common inter-board data link, and a universal ''Merger'' board for data fan-in/fan-out. Speed and adaptability are enhanced by use of modern FPGAs.
Date:
June 23, 2003
Creator:
Ashmanskas, B.; Barchiesi, A. & Bardi, A.
Object Type:
Article
System:
The UNT Digital Library
The Challenges to Coupling Dynamic Geospatial Models
Many applications of modeling spatial dynamic systems focus on a single system and a single process, ignoring the geographic and systemic context of the processes being modeled. A solution to this problem is the coupled modeling of spatial dynamic systems. Coupled modeling is challenging for both technical reasons, as well as conceptual reasons. This paper explores the benefits and challenges to coupling or linking spatial dynamic models, from loose coupling, where information transfer between models is done by hand, to tight coupling, where two (or more) models are merged as one. To illustrate the challenges, a coupled model of Urbanization and Wildfire Risk is presented. This model, called Vesta, was applied to the Santa Barbara, California region (using real geospatial data), where Urbanization and Wildfires occur and recur, respectively. The preliminary results of the model coupling illustrate that coupled modeling can lead to insight into the consequences of processes acting on their own.
Date:
June 23, 2006
Creator:
Goldstein, N
Object Type:
Article
System:
The UNT Digital Library
Changing Postal ZIP Code Boundaries
This report discusses the changing of ZIP Code system and the implications of such an action. The process places responsibility on district managers, rather than local postmasters, to review requests for boundary adjustment, to evaluate costs and benefits of alternative solutions to identified problems, and to provide a decision within 60 days.
Date:
June 23, 2006
Creator:
Stevens, Nye
Object Type:
Report
System:
The UNT Digital Library
CHARACTERIZATION OF DAMAGED MATERIALS
Thermal damage experiments were conducted on LX-04, LX-10, and LX-17 at high temperatures. Both pristine and damaged samples were characterized for their material properties. A pycnometer was used to determine sample true density and porosity. Gas permeability was measured in a newly procured system (diffusion permeameter). Burn rate was measured in the LLNL strand burner. Weight losses upon thermal exposure were insignificant. Damaged pressed parts expanded, resulting in a reduction of bulk density by up to 10%. Both gas permeabilities and burn rates of the damaged samples increased by several orders of magnitude due to higher porosity and lower density. Moduli of the damaged materials decreased significantly, an indication that the materials became weaker mechanically. Damaged materials were more sensitive to shock initiation at high temperatures. No significant sensitization was observed when the damaged samples were tested at room temperature.
Date:
June 23, 2006
Creator:
Hsu, P C; Dehaven, M; McClelland, M; Chidester, S & Maienschein, J L
Object Type:
Article
System:
The UNT Digital Library
Characterization of Prototype LSST CCDs
The ambitious science goals of the Large Synoptic Survey Telescope (LSST) will be achieved in part by a wide-field imager that will achieve a new level of performance in terms of area, speed, and sensitivity. The instrument performance is dominated by the focal plane sensors, which are now in development. These new-generation sensors will make use of advanced semiconductor technology and will be complemented by a highly integrated electronics package located inside the cryostat. A test laboratory has been set up at Brookhaven National Laboratory (BNL) to characterize prototype sensors and to develop test and assembly techniques for eventual integration of production sensors and electronics into modules that will form the final focal plane. As described in [1], the key requirements for LSST sensors are wideband quantum efficiency (QE) extending beyond lpm in the red, control of point spread function (PSF), and fast readout using multiple amplifiers per chip operated in parallel. In addition, LSST's fast optical system (f71.25) places severe constraints on focal plane flatness. At the chip level this involves packaging techniques to minimize warpage of the silicon die, and at the mosaic level careful assembly and metrology to achieve a high coplanarity of the sensor tiles. In …
Date:
June 23, 2008
Creator:
O'Connor, P.; Frank, J.; Geary, J. C.; Gilmore, D. K.; Kotov, I.; Radeka, V. et al.
Object Type:
Article
System:
The UNT Digital Library
Characterizing W-2 SLSF experiment temperature oscillations using computer graphics. [Sodium Loop Safety Facility]
The W-2 SLSF (Sodium Loop Safety Facility) experiment was an instrumented in-reactor test performed to characterize the failure response of full-length, preconditioned LMFBR prototypic fuel pins to slow transient overpower (TOP) conditions. Although the test results were expected to confirm analytical predictions of upper level failure and fuel expulsion, an axial midplane failure was experienced. Extensive post-test analyses were conducted to understand all of the unexpected behavior in the experiment. (1) The initial post-test effort focused on the temperature oscillations recorded by the 54 thermocouples used in the experiment. In order to synthesize the extensive data records and identify patterns of behavior in the data records, a computer-generated film was used to present the temperature data recorded during the experiment.
Date:
June 23, 1983
Creator:
Smith, D. E.
Object Type:
Article
System:
The UNT Digital Library
Chemical and radiochemical background concentrations of geologic materials beneath Fermilab
This document consists of a group of tables containing chemical and radiochemical analytical results of samples of geologic materials at Fermi National Accelerator Laboratory. The results are for materials from ground surface to approximately 375 feet below ground surface. The results are from materials obtained from previously undisturbed areas and represent background values. Material for analyses were taken from boreholes drilled as part of the NuMI ground water monitoring network.
Date:
June 23, 2000
Creator:
Kesich, Paul M.
Object Type:
Report
System:
The UNT Digital Library
Chemical compatibility study of Cooley L18KU, Herculite, and Elephant Mat with Hanford tank waste
An independent chemical compatibility review of various wrapping and absorbent/padding materials was conducted to evaluate resistance to chemicals and constituents present in liquid waste from the Hanford underground tanks. These materials will be used to wrap long-length contaminated equipment when such equipment is removed from the tanks and prepared for transportation and subsequent disposal or storage. The materials studied were Cooley L18KU, Herculite, and Elephant Mat. The study concludes that these materials are appropriate for use in this application.
Date:
June 23, 1998
Creator:
Mercado, J.E.
Object Type:
Report
System:
The UNT Digital Library
Chemical stimulation of geothermal injection wells
Various types of chemical stimulation methods have been considered. High pH fluids seem to be a logical choice for some wellbore and/or reservoir stimulations. However, forming of secondary deposits and creating of new reservoir damages due to chemical reactions between the rock material and these stimulation fluids make it advisable not to consider any of these high pH fluids in high temperature geothermal reservoirs. Fluids having a neutral pH can be successfully used in chemical stimulation methods only in a very few and rare instances. Low pH fluids, i.e. acids, have by far the best chance to be used for these chemical stimulation jobs. The major part of this report is concerned with acidizing techniques for geothermal injection wells. The acidizing techniques to be used for an experimental and the routine stimulation of injection wells are described. Some recent field experiences and the results of some laboratory work are described.
Date:
June 23, 1982
Creator:
Vetter, O. J. & Kandarpa, V.
Object Type:
Report
System:
The UNT Digital Library