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open access

Deposit Summary

Description: Deposit summary of $150.00 made on December 28, 2001.
Date: January 11, 2002
Partner: UNT Libraries Special Collections
open access

Reconciliation Report

Description: Reconciliation report with an ending account balance of $1,193.54 reconciled for the period ending on January 11, 2002.
Date: January 11, 2002
Partner: UNT Libraries Special Collections
open access

Time Reversal Signal Processing in Communications - A Feasibility Study

Description: A typical communications channel is subjected to a variety of signal distortions, including multipath, that corrupt the information being transmitted and reduce the effective channel capacity. The mitigation of the multipath interference component is an ongoing concern for communication systems operating in complex environments such as might be experienced inside buildings, urban environments, and hilly or heavily wooded areas. Communications between mobile units and distributed sensors, so imp… more
Date: January 30, 2002
Creator: Meyer, A W; Candy, J V & Poggio, A J
Partner: UNT Libraries Government Documents Department
open access

LDRD Final Report - 01-FS-004

Description: This report describes the results from an experimental program to investigate the feasibility of laser produced MeV protons as a diagnostic of electric fields or shock compressed materials. The experimental campaign was very successful, and has led to substantial advances in the characterization and optimization of proton sources from ultra-intense laser-solid interaction. This is a subject of the highest scientific interest [1] and is highly relevant to developing its use as a possible NIF imp… more
Date: January 23, 2002
Creator: Mackinnon, A. J.
Partner: UNT Libraries Government Documents Department
open access

Declaration Patent for the Invention of Device for Pulling Halyard

Description: The device for the halyard stretching consists of a frame with coupler and clamping rollers mounted in pairs on it, the drive of the rotation of the coupler rollers and the clamping device with a clamping spring. The clamping device is remarkable that the clamping rollers are mounted in a separate movable bracket, which is connected with the frame with the help of a hinge. Between the frame and the movable bracket a releasing spring is inserted. The clamping device is equipped with a movable ho… more
Date: January 31, 2002
Creator: Anuprienko, G. E.; Karpachov, Y. A.; Rowland, M. S.; Savenko, Y. M. & Smith, C. F.
Partner: UNT Libraries Government Documents Department
open access

White Paper on Institutional Capability Computing Requirements

Description: This paper documents the need for a rapid, order-of-magnitude increase in the computing infrastructure provided to scientists working in the unclassified domains at Lawrence Livermore National Laboratory. This proposed increase could be viewed as a step in a broader strategy linking hardware evolution to applications development that would take LLNL unclassified computational science to a position of distinction, if not preeminence, by 2006. We believe that it is possible for LLNL institutional… more
Date: January 29, 2002
Creator: Kissel, Lynn; McCoy, Michael G. & Seager, Mark K.
Partner: UNT Libraries Government Documents Department
open access

Carbon Nanotube Atomic Force Microscopy for Proteomics and Biological Forensics

Description: The Human Genome Project was focused on mapping the complete genome. Yet, understanding the structure and function of the proteins expressed by the genome is the real end game. But there are approximately 100,000 proteins in the human body and the atomic structure has been determined for less than 1% of them. Given the current rate at which structures are being solved, it will take more than one hundred years to complete this task. The rate-limiting step in protein structure determination is th… more
Date: January 1, 2002
Creator: Noy, A.; De Yoreo, J. J. & Malkin, A. J.
Partner: UNT Libraries Government Documents Department
open access

Effects of Introduced Materials in the Drift Scale Test

Description: Water samples previously acquired from superheated (>140 C) zones within hydrological test boreholes of the Drift Scale Test (DST) show relatively high fluoride concentrations (5-66 ppm) and low pH (3.1-3.5) values. In these high temperature regions of the rock, water is present superheated vapor only--liquid water for sampling purposes is obtained during the sampling process by cooling. Based on data collected to date, it is evident that the source of the fluoride and low pH is from introdu… more
Date: January 11, 2002
Creator: DeLoach, L & Jones, RL
Partner: UNT Libraries Government Documents Department
open access

A Laboratory Approach Relating Complex Resistivity Observations to Flow and Transport in Saturated and Unsaturated Hydrologic Regimes

Description: Subsurface imaging technology, such as electric resistance tomography (ERT), is rapidly improving as a means for characterizing some soil properties of the near-surface hydrologic regime. While this information can be potentially useful in developing hydrologic models of the subsurface that are required for contaminant transport investigations, an image alone of the subsurface soil regime gives little or no information about how the site will respond to groundwater flow or contaminant transport… more
Date: January 31, 2002
Creator: Martins, S A; Daily, W D & Ramirez, A L
Partner: UNT Libraries Government Documents Department
open access

Adaptive Tracking of Atmospheric Releases

Description: When dangerous chemical or biological releases occur in the atmosphere, emergency responders and decision makers must assess exposure rates to the affected population, establish evacuation routes, and allocate medical resources We have been working to improve the scientific basis for making such decisions. We believe that future rapid response teams, from LLNI, and other centers of expertise, will use a variety of atmospheric sensors and atmospheric computer models to predict and characterize t… more
Date: January 31, 2002
Creator: Larson, D & Calhoun, R
Partner: UNT Libraries Government Documents Department
open access

Novel Processing of 81-mm Cu Shaped Charge Liners

Description: A seven-step procedure was developed for producing shaped charge liner blanks by back extrusion at liquid nitrogen temperatures. Starting with a 38.1-mm diameter, 101.6-mm long cylinder at 77K, three forging steps with a flat-top die are required to produce the solid cone while maintaining low temperature. The solid cone is forged in four individual back extrusions at 77K to produce the rough liner blank. This procedure is capable of being run in batch processes to improve the time efficiency.
Date: January 16, 2002
Creator: Schwartz, A & Korzekwa, D
Partner: UNT Libraries Government Documents Department
open access

Macro-Scale Reactive Flow Model for High-Explosive Detonation in Support of ASCI Weapon Safety Milepost

Description: Explosive grain-scale simulations are not practical for weapon safety simulations. Indeed for nearly ideal explosives with reaction zones of order 500 {micro}m, even reactive flow models are not practical for weapon safety simulations. By design, reactive flow models must resolve the reaction zone, which implies computational cells with dimension of order 50 {micro}m for such explosives. The desired result for a simulation in which the reaction zone is not resolved is that the explosive behaves… more
Date: January 3, 2002
Creator: Reaugh, J E
Partner: UNT Libraries Government Documents Department
open access

Chimeric Proteins to Detect DNA Damage and Mismatches

Description: The goal of this project was to develop chimeric proteins composed of a DNA mismatch or damage binding protein and a nuclease, as well as methods to detect DNA mismatches and damage. We accomplished this through protein engineering based on using polymerase chain reactions (PCRs) to create chimeras with novel functions for damage and mismatch detection. This project addressed fundamental questions relating to disease susceptibility and radiation-induced damage in cells. It also supported and en… more
Date: January 14, 2002
Creator: McCutchen-Maloney, S.; Malfatti, M. & Robbins, K. M.
Partner: UNT Libraries Government Documents Department
open access

Unclassified Computing Capability: User Responses to a Multiprogrammatic and Institutional Computing Questionnaire

Description: We are experimenting with a new computing model to be applied to a new computer dedicated to that model. Several LLNL science teams now have computational requirements, evidenced by the mature scientific applications that have been developed over the past five plus years, that far exceed the capability of the institution's computing resources. Thus, there is increased demand for dedicated, powerful parallel computational systems. Computation can, in the coming year, potentially field a capabili… more
Date: January 29, 2002
Creator: McCoy, M & Kissel, L
Partner: UNT Libraries Government Documents Department
open access

Strobe Light Deterrent Efficacy Test and Fish Behavior Determination at Grand Coulee Dam Third Powerplant Forebay

Description: This report describes the work conducted during the first year of a long-term study to assess the efficacy of a prototype strobe light system in eliciting a negative phototactic response in kokanee and rainbow trout. The strobe light system is being evaluated as a means to prevent entrainment (and subsequent loss) of fish at the entrance to the forebay adjacent to the third powerplant at Grand Coulee Dam. Pacific Northwest National Laboratory and the Colville Confederated Tribes are collaborati… more
Date: January 29, 2002
Creator: Simmons, Mary Ann; Johnson, Robert L.; McKinstry, Craig A.; Anglea, Steven M.; Simmons, Carver S.; Thorsten, Susan L. et al.
Partner: UNT Libraries Government Documents Department
open access

Laser Science and Technology Program Update 2001

Description: The Laser Science and Technology (LS&T) Program's mission is to develop advanced solid-state lasers, optics, materials technologies, and applications to solve problems and create new capabilities of importance to the Nation and the Laboratory. A top, near-term priority is to provide technical support to the National Ignition Facility (NIF) to ensure activation success. LS&T provides the NIF Programs with core competencies and supports its economic viability. The primary objectives of LS… more
Date: January 1, 2002
Creator: Chen, H L & Hackel, L A
Partner: UNT Libraries Government Documents Department
open access

Spheromak Impedance and Current Amplification

Description: It is shown that high current amplification can be achieved only by injecting helicity on the timescale for reconnection, {tau}{sub REC}, which determines the effective impedance of the spheromak. An approximate equation for current amplification is: dI{sub TOR}{sup 2}/dt {approx} I{sup 2}/{tau}{sub REC} - I{sub TOR}{sup 2}/{tau}{sub closed} where I is the gun current, I{sub TOR} is the spheromak toroidal current and {tau}{sub CLOSED} is the ohmic decay time of the spheromak. Achieving high cur… more
Date: January 31, 2002
Creator: Fowler, T K; Hua, D D & Stallard, B W
Partner: UNT Libraries Government Documents Department
open access

Tank Leak Experiment at the Mock Tank Site, 200 East Area: Electrical Resistance Tomography-Preliminary Results

Description: Electrical resistance measurements were used to monitor several releases of brine from the Mock Tank Test site at the 200 East Area. Three different methods were used to analyze the data: (1) a simple average of the raw data was used as an indicator of the presence/absence of a leak, (2) tomography of the region beneath the tank using data from steel-cased borehole, and (3) tomography of the region beneath the tank using data from vertical electrode arrays. Each of these methods was able to det… more
Date: January 18, 2002
Creator: Ramirez, A; Daily, W & Binley, A
Partner: UNT Libraries Government Documents Department
open access

Metrology of Non-Rigid Objects

Description: Dimensional characterization of non-rigid parts presents many challenges. For example, when a non-rigid part is mounted in an inspection apparatus the effects of fixturing constraints are significant. If the part is not used in normal service with the same load conditions as during inspection, the dimensional characteristics will deviate from reported values. Further, the solution of designing specialized fixturing to duplicate ''as-installed'' conditions does not fully resolve the problem beca… more
Date: January 1, 2002
Creator: Blaedel, K; Swift, D; Claudet, A; Kasper, E & Patterson, S
Partner: UNT Libraries Government Documents Department
open access

Development of Tritium AMS for Biomedical Sciences Research

Description: Tritium ({sup 3}H) is a radioisotope that is extensively utilized in biological research. Normally in the biological sciences, {sup 3}H is quantified by liquid scintillation counting. For the most sensitive measurements, liquid scintillation counting requires large samples and counting times of several-hours. In contrast, provisional studies at LLNL's Center for Accelerator Mass Spectrometry have demonstrated that Accelerator Mass Spectrometry (AMS) can be-used to quantify {sup 3}H in milligram… more
Date: January 1, 2002
Creator: Dingley, K H & Chiarappa-Zucca, M L
Partner: UNT Libraries Government Documents Department
open access

Development of Direct and Optical Polarized Nuclear Magnetic Resonance (NMR) Methods for Characterization and Engineering of Mesophased Molecular Structures

Description: The development of NMR methods for the characterization of structure and dynamics in mesophase composite systems was originally proposed in this LDRD. Mesophase systems are organic/inorganic hybrid materials whose size and motional properties span the definition of liquids and solids, such as highly viscous gels or colloidal suspensions. They are often composite, ill defined, macromolecular structures that prove difficult to characterize. Mesophase materials are of broad scientific and programm… more
Date: January 29, 2002
Creator: Maxwell, R; Baumann, T & Taylor, B
Partner: UNT Libraries Government Documents Department
open access

Proceedings of the 3rd US-Japan Workshop on Plasma Polarization Spectroscopy

Description: The third US-Japan Workshop on Plasma Polarization Spectroscopy was held at the Lawrence Livermore National Laboratory in Livermore, California, on June 18-21, 2001. The talks presented at this workshop are summarized in these proceedings. The papers cover both experimental investigation and applications of plasma polarization spectroscopy as well as the theoretical foundation and formalisms to understand and describe the polarization phenomena. The papers give an overview of the history of pla… more
Date: January 2, 2002
Creator: Beiersdorfer, P & Flyimoto, T
Partner: UNT Libraries Government Documents Department
open access

Metal-Insulator Transition in Li and LiH - Final Report

Description: The main goals of this project were the search for a predicted nonmetallic high-pressure phase of Li and finding the metallization conditions for LiH. It has been predicted by Neaton & Ashcroft at Cornell [1] that the lithium atoms would pair at pressures around 100 GPa and their valence electrons would become localized in the interstitial regions and therefore non-conducting. LiH, an ionic compound, provides the unique opportunity to understand the effects of coupling two elements with opposit… more
Date: January 15, 2002
Creator: Bastea, M. & Cauble, R.
Partner: UNT Libraries Government Documents Department
open access

Multiscale Surgical Telerobots

Description: A project was undertaken to improve robotic surgical tools for telerobotic minimally invasive surgery. The major objectives were to reduce the size of the tools to permit new surgical procedures in confined spaces such as the heart and to improve control of surgical tools by locating positional sensors and actuators at the end effector rather than external to the patient as is currently the state of the technology. A new compact end-effector with wrist-like flexibility was designed. Positional … more
Date: January 23, 2002
Creator: Miles, R. R.; Seward, K. P.; Benett, W. J.; Tendick, F.; Bentley, L. & Stephan, P. L.
Partner: UNT Libraries Government Documents Department
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