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Summary of DWI Involved Accidents in the State of Texas for [the] First Six Months [of] 1999
Semiannual report providing tabular statistical information about motor vehicle accidents in Texas involving DWI (driving while impaired) during 1999, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
July 20, 2000
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
Summary of Motorcycle Involved Accidents in the State of Texas for [the] First Six Months [of] 2000
Semiannual report providing tabular statistical information about motor vehicle accidents that involved motorcycles in Texas during calendar year 2000, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
July 20, 2000
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
Summary of Military Driver Involved Accidents in the State of Texas for [the] First Six Months [of] 2000
Annual report providing tabular statistical information about motor vehicle accidents involving military drivers in Texas during 2000, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
July 20, 2000
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
Summary of All Reported Accidents in the State of Texas for [the] First Six Months [of] 2000
Semiannual report providing tabular statistical information about motor vehicle accidents in Texas during 2000, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
July 20, 2000
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
Summary of All Reported Accidents in Rural Areas of Texas for [the] First Six Months [of] 2000
Semiannual report providing tabular statistical information about motor vehicle accidents in rural areas of Texas during 2000, with data broken out by various criteria including number of persons, locations, types of accidents, time of day, and other factors.
Date:
July 20, 2000
Creator:
Texas. Department of Public Safety. Accident Records Bureau.
Object Type:
Report
System:
The Portal to Texas History
Unmanned Systems Integrated Roadmap: Fiscal Years 2009-2034
Biennial report describing progress and changes in unmanned systems technology used by the military, with a 25-year strategic plan to describe goals for the continued development, production, testing, training, operation, and sustainment of the technologies. "This is the second edition of the integrated Office of the Secretary of Defense Unmanned Systems Roadmap (2009-2034) that includes Unmanned Aircraft systems, Unmanned Ground systems and Unmanned Maritime Systems. This Roadmap provides Defense-wide vision for unmanned systems and related technologies" (p. iii).
Date:
April 20, 2009
Creator:
United States. Department of Defense.
Object Type:
Book
System:
The UNT Digital Library
Materials Science at the Extremes of Pressure and Strain Rate
Solid state experiments at very high pressures and strain rates are possible on high power laser facilities, albeit over brief intervals of time and spatial small scales. A new shockless drive has been developed on the Omega laser. VISAR measurements establish the high strain rates, 10{sup 7}-10{sup 8} s{sup -1}. Solid-state strength is inferred using the Rayleigh-Taylor instability as a ''diagnostic''. Temperature and compression in polycrystalline samples can be deduced from EXAFS measurements. Lattice response can be inferred from time-resolved x-ray diffraction. Deformation mechanisms can be identified by examining recovered samples. We will briefly review this new area of laser-based materials science research, then present a path forward for carrying these solid-state experiments to much higher pressures, P >> 1 Mbar, on the NIF laser facility.
Date:
August 20, 2003
Creator:
Remington, B. A.; Cavallo, R. M.; Edwards, M. J.; Lasinski, B. F.; Lorenz, K. T.; Lorenzana, H. E. et al.
Object Type:
Article
System:
The UNT Digital Library
Laser Peening--Strengthening Metals to Improve Fatigue Lifetime and Retard Stress-Induced Corrosion Cracking in Gears, Bolts and Cutter
Laser peening is an emerging modern process that impresses a compressive stress into the surfaces of metals. Treatment can reduce the rate of fatigue cracking and stress-corrosion-cracking in metals (such as gears, bolts and cutters) needed for tunnel boring and other construction & mining applications. Laser peening could also be used to form metals or alloys into a precise shape without yielding and leaving both sulfates in a crack resistant compressive state.
Date:
August 20, 2003
Creator:
Hackel, L. A. & Chen, H. L.
Object Type:
Report
System:
The UNT Digital Library
Material transfer system in support of the plutonium immobilization program
The Plutonium Immobilization Program requires development of the process and plant prototypic equipment to immobilize surplus plutonium in ceramic for long-term storage. Because of the hazardous nature of plutonium, it was necessary to develop a remotely operable materials transfer system which can function within the confines of a glovebox. In support of this work at LLNL, such a material transfer system (MTS) was developed. This paper presents both the mechanical and controls parts making up this system, and includes photographs of the key components and diagrams of their assemblies, as well as a description of the control sequence used to validate the MTS capabilities.
Date:
December 20, 2000
Creator:
Pak, D
Object Type:
Article
System:
The UNT Digital Library
Multi-Scale Thermohydrologic Model Sensitivity-Study Calculations in Support of the SSPA
The purpose of this calculation report is to document the thermohydrologic (TH) model calculations performed for the Supplemental Science and Performance Analysis (SSPA), Volume 1, Section 5 and Volume 2 (BSC 2001d [DIRS 155950], BSC 2001e [DIRS 154659]). The calculations are documented here in accordance with AP-3.12Q REV0 ICN4 [DIRS 154418]. The Technical Working Plan (Twp) for this document is TWP-NGRM-MD-000015 Real. These TH calculations were primarily conducted using three model types: (1) the Multiscale Thermohydrologic (MSTH) model, (2) the line-averaged-heat-source, drift-scale thermohydrologic (LDTH) model, and (3) the discrete-heat-source, drift-scale thermal (DDT) model. These TH-model calculations were conducted to improve the implementation of the scientific conceptual model, quantify previously unquantified uncertainties, and evaluate how a lower-temperature operating mode (LTOM) would affect the in-drift TH environment. Simulations for the higher-temperature operating mode (HTOM), which is similar to the base case analyzed for the Total System Performance Assessment for the Site Recommendation (TSPA-SR) (CRWMS M&O 2000j [DIRS 153246]), were also conducted for comparison with the LTOM. This Calculation Report describes (1) the improvements to the MSTH model that were implemented to reduce model uncertainty and to facilitate model validation, and (2) the sensitivity analyses conducted to better understand the influence of parameter …
Date:
December 20, 2001
Creator:
Glascoe, L G; Buscheck, T A; Loosmore, G A & Sun, Y
Object Type:
Report
System:
The UNT Digital Library
Stability of Stationary Solutions of the Multifrequency Radiation Diffusion Equations
A nondimensional model of the multifrequency radiation diffusion equation is derived. A single material, ideal gas, equation of state is assumed. Opacities are proportional to the inverse of the cube of the frequency. Inclusion of stimulated emission implies a Wien spectrum for the radiation source function. It is shown that the solutions are uniformly bounded in time and that stationary solutions are stable. The spatially independent solutions are asymptotically stable, while the spatially dependent solutions of the linearized equations approach zero.
Date:
January 20, 2004
Creator:
Hald, O H & Shestakov, A I
Object Type:
Article
System:
The UNT Digital Library
Position Estimation of Transceivers in Communication Networks
With rapid developments in wireless sensor networks, there is a growing need for transceiver position estimation independent of GPS, which may not be available in indoor networks. Our approach is to use range estimates from time-of-flight (TOF) measurements, a technique well suited to large bandwidth physical links, such as in ultra-wideband (UWB) systems. In our UWB systems, pulse duration less than 200 psecs can easily be resolved to less than a foot. Assuming an encoded UWB physical layer, we first test positioning accuracy using simulations. We are interested in sensitivity to range errors and the required number of ranging nodes, and we show that in a high-precision environment, such as UWB, the optimal number of transmitters is four. Four transmitters with {+-}20ft. range error can locate a receiver to within one or two feet. We then implement these algorithms on an 802.11 wireless network and demonstrate the ability to locate a network access point to approximately 20 feet.
Date:
January 20, 2004
Creator:
Dowla, F. & Kent, C.
Object Type:
Article
System:
The UNT Digital Library
Monitoring Plan for RCRA Groundwater Assessment at the 216-U-12 Crib
This document contains a revised and updated monitoring plan for RCRA interim status groundwater assessment, site hydrogeology, and a conceptual model of the RCRA treatment, storage, and disposal unit. Monitoring under interim status is expected to continue until the 216-U-12 crib is incorporated as a chapter into the Hanford Facility RCRA Permit or administratively closed as proposed to EPA and Ecology.
Date:
September 20, 2005
Creator:
Williams, Bruce A. & Chou, Charissa J.
Object Type:
Report
System:
The UNT Digital Library
Dislocation dynamics: simulation of plastic flow of bcc metals
This is the final report for the LDRD strategic initiative entitled ''Dislocation Dynamic: Simulation of Plastic Flow of bcc Metals'' (tracking code: 00-SI-011). This report is comprised of 6 individual sections. The first is an executive summary of the project and describes the overall project goal, which is to establish an experimentally validated 3D dislocation dynamics simulation. This first section also gives some information of LLNL's multi-scale modeling efforts associated with the plasticity of bcc metals, and the role of this LDRD project in the multiscale modeling program. The last five sections of this report are journal articles that were produced during the course of the FY-2000 efforts.
Date:
February 20, 2001
Creator:
Lassila, D H
Object Type:
Report
System:
The UNT Digital Library
High-resolution crystal spectrometer for the 10-60 (angstrom) EUV region
A vacuum crystal spectrometer with nominal resolving power approaching 1000 is described for measuring emission lines with wavelength in the extreme ultraviolet region up to 60 Angstroms. The instrument utilizes a flat octadecyl hydrogen maleate (OHM) crystal and a thin-window 1-D position-sensitive gas proportional detector. This detector employs a 1 {micro}m-thick 100 x8 mm{sup 2} aluminized polyimide window and operates at one atmosphere pressure. The spectrometer has been implemented on the Livermore electron beam ion traps. The performance of the instrument is illustrated in measurements of the newly discovered magnetic field-sensitive line in Ar{sup 8+}.
Date:
February 20, 2004
Creator:
Beiersdorfer, P; Brown, G V; Goddard, R & Wargelin, B J
Object Type:
Article
System:
The UNT Digital Library
Performance Technolgies for Peta-Scale Systems: A White Paper Prepared by the Performance Evaluation Research Center
Future-looking high end computing initiatives will deploy powerful, large-scale computing platforms that leverage novel component technologies for superior node performance in advanced system architectures with tens or even hundreds of thousands of nodes. Recent advances in performance tools and modeling methodologies suggest that it is feasible to acquire such systems intelligently and achieve excellent performance, while also significantly reducing the user time required to attain high performance. These developments are relevant to several aspects of future HEC technology outlined in the recent HECRTF white paper request, in particular items 5.4, 5.5, 5.6, and 5.8. We envision the following specific capabilities: (1) Performance modeling tools, available to researchers and vendors, will extrapolate performance from prototype systems to full-scale systems, and even accurately predict performance behavior before systems are manufactured, thus enabling both improved designs and more intelligent selection of systems in procurements. (2) System simulation facilities, implemented on highly parallel platforms and available to researchers and vendors, will for instance realistically model the performance of a specific interprocessor network design running a specific scientific application code. As with item 1, these facilities can lead both to improved designs and procurement decisions that yield significantly greater sustained performance for targeted scientific applications. …
Date:
May 20, 2003
Creator:
Bailey, D. H.; de Supinski, B. R.; Dongarra, J.; Dunigan, T.; Gao, G.; Hoisie, A. et al.
Object Type:
Report
System:
The UNT Digital Library
RCRA Groundwater Monitoring Plan for Single-Shell Tank Waste Management Area C, Interim Change Notice 2
This interim change notice makes changes in the original groundwater monitoring plan. This ICN documents the deferral of statistical upgradient/downgradient comparisons for WMA C until conductivity stabilized in upgradient well 299-E27-7 or a new upgradient well is installed and stable and upgradient values for specific conductance are obtained.
Date:
May 20, 2003
Creator:
Narbutovskih, Susan M. (BATTELLE (PACIFIC NW LAB)) & Chou, Charissa J. (BATTELLE (PACIFIC NW LAB))
Object Type:
Report
System:
The UNT Digital Library
469nm Fiber Laser Source
We have demonstrated 466mW of 469nm light from a frequency doubled continuous wave fiber laser. The system consisted of a 938nm single frequency laser diode master oscillator, which was amplified in two stages to 5 Watts using cladding pumped Nd{sup 3+} fiber amplifiers and then frequency doubled in a single pass through periodically poled KTP. The 3cm long PPKTP crystal was made by Raicol Crystals Ltd. with a period of 5.9 {micro}m and had a phase match temperature of 47 degrees Centigrade. The beam was focused to a 1/e{sup 2} diameter in the crystal of 29 {micro}m. Overall conversion efficiency was 11% and the results agreed well with standard models. Our 938nm fiber amplifier design minimizes amplified spontaneous emission at 1088nm by employing an optimized core to cladding size ratio. This design allows the 3-level transition to operate at high inversion, thus making it competitive with the 1088nm 4-level transition. We have also carefully chosen the fiber coil diameter to help suppress propagation of wavelengths longer than 938 nm. At 2 Watts, the 938nm laser had an M{sup 2} of 1.1 and good polarization (correctable with a quarter and half wave plate to >10:1).
Date:
January 20, 2005
Creator:
Drobshoff, A; Dawson, J W; Pennington, D M; Payne, S A & Beach, R
Object Type:
Article
System:
The UNT Digital Library
NUCLEAR-OPTICAL CONVERTERS FOR NEUTRON DETECTION
Nuclear-optical converters (NOC) are fission chambers based upon fission fragment energy conversion to optical radiation in gas luminescent media. The All-Russia Scientific Research Institute of Experimental Physics (VNIIEF) has demonstrated that it is possible to construct nuclear-optical converters with characteristics appropriate for a wide-range of measuring applications including neutron detection in nuclear power plants. These detectors may be used a number of different modes: pulse count, luminescent (equivalent to current mode in ionization detectors), and lasing (essentially a neutron switch). NOCs offer a number of potential advantages over ionization detectors. The detectors require no power supply. Signals are transmitted via light-pipe or fiber optics rather than insulated electrical cable. The detectors are less sensitive to gamma radiation. NOC can produce large signals, obviating the need for pre-amplifiers near the detector. It is possible to construct a single detector which measures flux at many discrete points and at the same time provides total flux along a line containing these discrete points. This paper describes the construction and testing of NOC at VNIIEF; the range of characteristics thought to be reasonably attainable with nuclear-optical converters, and possible applications to nuclear power plant instrumentation.
Date:
August 20, 2004
Creator:
Sinyanskii, A A; Melnikov, S P; Dovbysh, L E & Johnson, G L
Object Type:
Article
System:
The UNT Digital Library
Sorption and Transport of Iodine Species in Sediments from the Savannah River and Hanford Sites
Iodine is an important element in studies of environmental protection and human health, global-scale hydrologic processes and nuclear nonproliferation. Biogeochemical cycling of iodine is complex, because iodine occurs in multiple oxidation states and as inorganic and organic species that may be hydrophilic, atmophilic, and biophilic. In this study, we focused on the sorption and transport behavior of iodine species (iodide, iodate, and 4-iodoaniline) in sediments collected at the Savannah River and Hanford Sites, where anthropogenic {sup 129}I from prior nuclear fuel processing activities poses an environmental risk. We conducted both column and batch experiments to investigate the sorption and transport behavior of iodine, and the sediments we examined exhibit a wide range in organic matter, clay mineralogy, soil pH, and texture. The results of our experiments illustrate complex behavior with various processes occurring, including iodate reduction, irreversible retention or mass loss of iodide, and rate-limited and nonlinear sorption. There was an appreciable iodate reduction to iodide, presumably mediated by the structural Fe(II) in some clay minerals; therefore, careful attention must be given to potential interconversion among species when interpreting the biogeochemical behavior of iodine in the environment. The different iodine species exhibited dramatically different sorption and transport behavior in three …
Date:
May 20, 2004
Creator:
Hu, Q; Zhao, P; Moran, J & Seaman, J
Object Type:
Article
System:
The UNT Digital Library
Salient Points for Tracking Moving Objects in Video
Detection and tracking of moving objects is important in the analysis of video data. One approach is to maintain a background model of the scene and subtract it from each frame to detect the moving objects which can then be tracked using Kalman or particle filters. In this paper, we consider simple techniques based on salient points to identify moving objects which are tracked using motion correspondence. We focus on video with a large field of view, such as a traffic intersection with several buildings nearby. Such scenes can contain several salient points, not all of which move between frames. Using public domain video and two types of salient points, we consider how to make these techniques computationally efficient for detection and tracking. Our early results indicate that salient regions obtained using the Lowe keypoints algorithm and the Scale-Saliency algorithm can be used successfully to track vehicles in moderate resolution video.
Date:
December 20, 2004
Creator:
Kamath, C; Gezahegne, A; Newsam, S & Roberts, G M
Object Type:
Article
System:
The UNT Digital Library
Vacuum Drying of Actual Transuranic Waste from Hanford Tanks
Composites of sludge from Tanks 241-B-203, 241-T-203, 241 T 204, and 241-T-110 at the Hanford Site were prepared at the Hanford 222-S Laboratory from core samples retrieved from these tanks. These tank composites may not be representative of the entire contents of the tank but provide some indication of the properties of the waste within these underground storage tanks. The composite samples were diluted with water at the Radiochemical Processing Laboratory at Pacific Northwest National Laboratory to represent the slurries that are expected to be received from tank retrieval operations and processed to produce a final waste stream. The dilutions were vacuum dried at 60 C and 26 in. of mercury ({approx} 100 torr). Semi-quantitative measurements of stickiness and cohesive strength were made on these dilutions as a function of drying time. Mass loss as a function of drying time and total solids concentration of the initial dilution and at the conclusion of drying were also measured. Visual observations of the sludge were recorded throughout the drying process.
Date:
May 20, 2004
Creator:
Tingey, Joel M.
Object Type:
Report
System:
The UNT Digital Library
Simulation of Chamber Transport for Heavy-Ion Fusion Drivers
The heavy-ion fusion (HIF) community recently developed a power-plant design that meets the various requirements of accelerators, final focus, chamber transport, and targets. The point design is intended to minimize physics risk and is certainly not optimal for the cost of electricity. Recent chamber-transport simulations, however, indicate that changes in the beam ion species, the convergence angle, and the emittance might allow more-economical designs.
Date:
May 20, 2004
Creator:
Sharp, W. M.; Callahan, D. A.; Tabak, M.; Yu, S. S.; Peterson, P. F.; Rose, D. V. et al.
Object Type:
Article
System:
The UNT Digital Library
Yb:S-FAP Lasers
It has recently been reported that several high power, diode-pumped laser systems have been developed based on crystals of Yb:S-FAP [Yb{sup 3+}:Sr{sub 5}(PO{sub 4}){sub 3}F]. The Mercury Laser, at Lawrence Livermore National Laboratory, is the most prominent system using Yb:S-FAP and is currently producing 23J at 5 Hz in a 15 nsec pulse, based on partial activation of the system. In addition, a regenerative amplifier is being developed at Waseda University in Japan and has produced greater than 12 mJ with high beam quality at 50Hz repetition rate. Q-peak has demonstrated 16 mJ of maximum energy/output pulse in a multi-pass, diode side-pumped amplifier and ELSA in France is implementing Yb:S-FAP in a 985 nm pump for an EDFA, producing 250 mW. Growth of high optical quality crystals of Yb:S-FAP is a challenge due to multiple crystalline defects. However, at this time, a growth process has been developed to produce high quality 3.5 cm diameter Yb:S-FAP crystals and a process is under development for producing 6.5 cm diameter crystals.
Date:
January 20, 2004
Creator:
Schaffers, K I
Object Type:
Article
System:
The UNT Digital Library