Language

Algorithms and Requirements for Measuring Network Bandwidth (open access)

Algorithms and Requirements for Measuring Network Bandwidth

This report unveils new algorithms for actively measuring (not estimating) available bandwidths with very low intrusion, computing cross traffic, thus estimating the physical bandwidth, provides mathematical proof that the algorithms are accurate, and addresses conditions, requirements, and limitations for new and existing algorithms for measuring network bandwidths. The paper also discusses a number of important terminologies and issues for network bandwidth measurement, and introduces a fundamental parameter -Maximum Burst Size that is critical for implementing algorithms based on multiple packets.
Date: December 8, 2002
Creator: Jin, Guojun
Object Type: Report
System: The UNT Digital Library
Confirmation of production of element 110 by the (208)Pb(64-Ni,n) reaction (open access)

Confirmation of production of element 110 by the (208)Pb(64-Ni,n) reaction

We report the experimental confirmation of the production of element110. In the bombardment of a 208Pb target with a 309~MeV 64Ni beam, we have observed two chains of time- and position-correlated events. Each chain consisted of the implantation of an evaporation residue followed by the emission of alpha-particles. We attribute these two chains to the decay of 271-110 produced with a cross section of 8.3 (+11/-5.3)pb.
Date: December 8, 2002
Creator: Ginter, T. N.; Gregorich, K. E.; Loveland, W.; Lee, D. M.; Kirbach, U. W.; Sudowe, R. et al.
Object Type: Article
System: The UNT Digital Library
Graphical Model Theory for Wireless Sensor Networks (open access)

Graphical Model Theory for Wireless Sensor Networks

Information processing in sensor networks, with many small processors, demands a theory of computation that allows the minimization of processing effort, and the distribution of this effort throughout the network. Graphical model theory provides a probabilistic theory of computation that explicitly addresses complexity and decentralization for optimizing network computation. The junction tree algorithm, for decentralized inference on graphical probability models, can be instantiated in a variety of applications useful for wireless sensor networks, including: sensor validation and fusion; data compression and channel coding; expert systems, with decentralized data structures, and efficient local queries; pattern classification, and machine learning. Graphical models for these applications are sketched, and a model of dynamic sensor validation and fusion is presented in more depth, to illustrate the junction tree algorithm.
Date: December 8, 2002
Creator: Davis, William B.
Object Type: Report
System: The UNT Digital Library
Comparison of Anti-Reflective Coated and Uncoated Surfaces Figured by Pitch-Polishing and Magneto-Rheological Processes (open access)

Comparison of Anti-Reflective Coated and Uncoated Surfaces Figured by Pitch-Polishing and Magneto-Rheological Processes

When completed, the National Ignition Facility (NIF) will provide laser energies in the Mega-joule range. Successful pulse amplification to these extremely high levels requires that all small optics, found earlier in the beamline, have stringent surface and laser fluence requirements. In addition, they must operate reliably for 30 years constituting hundreds of thousands of shots. As part of the first four beamlines, spherical and aspherical lenses were required for the beam relaying telescopes. The magneto-rheological technique allows for faster and more accurate finishing of aspheres. The spherical and aspherical lenses were final figured using both conventional-pitch polishing processes for high quality laser optics and the magneto-rheological finishing process. The purpose of this paper is to compare the surface properties between these two finishing processes. Some lenses were set aside from production for evaluation. The surface roughness in the mid-frequency range was measured and the scatter was studied. Laser damage testing at 1064 nm (3-ns pulse width) was performed on surfaces in both the uncoated and coated condition.
Date: November 8, 2002
Creator: Chow, R.; Thomas, M. D.; Bickel, R. & Taylor, J. R.
Object Type: Article
System: The UNT Digital Library
Compendium of regulatory requirements governing underground injection of drilling waste. (open access)

Compendium of regulatory requirements governing underground injection of drilling waste.

Large quantities of waste are produced when oil and gas wells are drilled. The two primary types of drilling wastes include used drilling fluids (commonly referred to as muds), which serve a variety of functions when wells are drilled, and drill cuttings (rock particles ground up by the drill bit). Some oil-based and synthetic-based muds are recycled; other such muds, however, and nearly all water-based muds, are disposed of. Numerous methods are employed to manage drilling wastes, including burial of drilling pit contents, land spreading, thermal processes, bioremediation, treatment and reuse, and several types of injection processes. This report provides a comprehensive compendium of the regulatory requirements governing the injection processes used for disposing of drilling wastes; in particular, for a process referred to in this report as slurry injection. The report consists of a narrative discussion of the regulatory requirements and practices for each of the oil- and gas-producing states, a table summarizing the types of injection processes authorized in each state, and an appendix that contains the text of many of the relevant state regulations and policies. The material included in the report was derived primarily from a review of state regulations and from interviews with state oil …
Date: November 8, 2002
Creator: Puder, M. G.; Bryson, B. & Veil, J. A.
Object Type: Report
System: The UNT Digital Library
Complexation of thorium(IV) with 2-furoic acid and 2-thenoic acid in aqueous solution (open access)

Complexation of thorium(IV) with 2-furoic acid and 2-thenoic acid in aqueous solution

None
Date: November 8, 2002
Creator: Bismondo, Arturo; Di Bernardo, Plinio; Zanonato, PierLuigi; Jiang, Jun & Rao, Linfeng
Object Type: Article
System: The UNT Digital Library
Design and Field Test of a Galvanometer Deflected Streak Camera (open access)

Design and Field Test of a Galvanometer Deflected Streak Camera

We have developed a compact fieldable optically-deflected streak camera first reported in the 20th HSPP Congress. Using a triggerable galvanometer that scans the optical signal, the imaging and streaking function is an all-optical process without incurring any photon-electron-photon conversion or photoelectronic deflection. As such, the achievable imaging quality is limited mainly only by optical design, rather than by multiple conversions of signal carrier and high voltage electron-optics effect. All core elements of the camera are packaged into a 12 inch x 24 inch footprint box, a size similar to that of a conventional electronic streak camera. At LLNL's Site-300 Test Site, we have conducted a Fabry-Perot interferometer measurement of fast object velocity using this all-optical camera side-by-side with an intensified electronic streak camera. These two cameras are configured as two independent instruments for recording synchronously each branch of the 50/50 splits from one incoming signal. Given the same signal characteristics, the test result has undisputedly demonstrated superior imaging performance for the all-optical streak camera. It produces higher signal sensitivity, wider linear dynamic range, better spatial contrast, finer temporal resolution, and larger data capacity as compared with that of the electronic counterpart. The camera had also demonstrated its structural robustness and …
Date: November 8, 2002
Creator: Lai, Ching C.; Goosman, David R.; Wade, James T. & Avara, Rex
Object Type: Article
System: The UNT Digital Library
Disabling Radiological Dispersal Terror (open access)

Disabling Radiological Dispersal Terror

Terror resulting from the use of a radiological dispersal device (RDD) relies upon an individual's lack of knowledge and understanding regarding its significance. Disabling this terror will depend upon realistic reviews of the current conservative radiation protection regulatory standards. It will also depend upon individuals being able to make their own informed decisions merging perceived risks with reality. Preparation in these areas will reduce the effectiveness of the RDD and may even reduce the possibility of its use.
Date: November 8, 2002
Creator: Hart, M.
Object Type: Article
System: The UNT Digital Library
Electron Optics Design and Performance of a New Large-Format Two-Frame Framing Tube (open access)

Electron Optics Design and Performance of a New Large-Format Two-Frame Framing Tube

We have developed a framing tube with 80-mm photocathode for capturing two frames in less than 100-ns onto a 50-mm phosphor screen. A proven electron optics trajectory code was used to design the tube for imaging fidelity over wide dynamic range. This code's full accounting of space charge effects is essential for its ability to simulate accurately the distributed photoelectronic trajectories from the entire large photocathode area. Our approach and guideline for designing the electron optics are described. Results of trajectory simulation and test measurement are reported. Substantial correlations between the code expectation and the measured results are observed on relative resolution and distortion of the frame images. This tube has been integrated into an active framing camera system for field application.
Date: November 8, 2002
Creator: Lai, C C
Object Type: Article
System: The UNT Digital Library
Foreign Relations Authorization, FY2003: An Overview (open access)

Foreign Relations Authorization, FY2003: An Overview

Congress is required by law to authorize the spending of appropriations for the State Department and foreign policy activities every two years. The authorization process dovetails with the annual appropriation process for the Department of State and foreign policy/foreign aid activities. This report contains information on the recent developments, background, and key issues regarding foreign affairs considered by Congress in 2003.
Date: November 8, 2002
Creator: Epstein, Susan B.
Object Type: Report
System: The UNT Digital Library
INCREASING HEAVY OIL RESERVES IN THE WILMINGTON OIL FIELD THROUGH ADVANCED RESERVOIR CHARACTERIZATION AND THERMAL PRODUCTION TECHNOLOGIES (open access)

INCREASING HEAVY OIL RESERVES IN THE WILMINGTON OIL FIELD THROUGH ADVANCED RESERVOIR CHARACTERIZATION AND THERMAL PRODUCTION TECHNOLOGIES

The project involves using advanced reservoir characterization and thermal production technologies to improve thermal recovery techniques and lower operating and capital costs in a slope and basin clastic (SBC) reservoir in the Wilmington field, Los Angeles Co., CA. Through June 2002, project work has been completed on the following activities: data preparation; basic reservoir engineering; developing a deterministic three dimensional (3-D) geologic model, a 3-D deterministic reservoir simulation model and a rock-log model; well drilling and completions; and surface facilities on the Fault Block II-A Tar Zone (Tar II-A). Work is continuing on research to understand the geochemistry and process regarding the sand consolidation well completion technique, final reservoir tracer work, operational work and research studies to prevent thermal-related formation compaction in the Tar II-A steamflood area, and operational work on the Tar V post-steamflood pilot and Tar II-A post-steamflood projects. During the Third Quarter 2002, the project team essentially completed implementing the accelerated oil recovery and reservoir cooling plan for the Tar II-A post-steamflood project developed in March 2002 and is proceeding with additional related work. The project team has completed developing laboratory research procedures to analyze the sand consolidation well completion technique and will initiate work in the …
Date: November 8, 2002
Creator: Hara, Scott
Object Type: Report
System: The UNT Digital Library
The Legislative Process on the House Floor: An Introduction (open access)

The Legislative Process on the House Floor: An Introduction

This report provides an introduction to the legislative process on the House floor, including limitations on debate, calendars and the order of business, modes of floor consideration, senate amendments and conference reports, voting and quorum procedures, and information about a typical day on the House floor.
Date: November 8, 2002
Creator: Rybicki, Elizabeth & Bach, Stanley
Object Type: Report
System: The UNT Digital Library
The Legislative Process on the Senate Floor: An Introduction (open access)

The Legislative Process on the Senate Floor: An Introduction

This report discusses the legislative process on the senate floor; the right of extended debate that permits filibusters that can be brought to an end if the Senate invokes cloture, usually by a vote of three-fifths of all Senators.
Date: November 8, 2002
Creator: Carr, Thomas P. & Bach, Stanley
Object Type: Report
System: The UNT Digital Library
Lumber Imports from Canada: Issues and Events (open access)

Lumber Imports from Canada: Issues and Events

This report provides a concise historical account of the dispute, summarizes the subsidy and injury evidence, and discusses the current issues and events regarding lumber imports from Canada.
Date: November 8, 2002
Creator: Gorte, Ross W. & Grimmett, Jeanne
Object Type: Report
System: The UNT Digital Library
Next Step Spherical Torus Design Studies (open access)

Next Step Spherical Torus Design Studies

Studies are underway to identify and characterize a design point for a Next Step Spherical Torus (NSST) experiment. This would be a ''Proof of Performance'' device which would follow and build upon the successes of the National Spherical Torus Experiment (NSTX) a ''Proof of Principle'' device which has operated at PPPL since 1999. With the Decontamination and Decommissioning (D&D) of the Tokamak Fusion Test Reactor (TFTR) nearly completed, the TFTR test cell and facility will soon be available for a device such as NSST. By utilizing the TFTR test cell, NSST can be constructed for a relatively low cost on a short time scale. In addition, while furthering spherical torus (ST) research, this device could achieve modest fusion power gain for short-pulse lengths, a significant step toward future large burning plasma devices now under discussion in the fusion community. The selected design point is Q=2 at HH=1.4, P subscript ''fusion''=60 MW, 5 second pulse, with R subscript ''0''=1.5 m, A=1.6, I subscript ''p''=10vMA, B subscript ''t''=2.6 T, CS flux=16 weber. Most of the research would be conducted in D-D, with a limited D-T campaign during the last years of the program.
Date: November 8, 2002
Creator: Neumeyer, C.; Heitzenroeder, P.; Kessel, C.; Ono, M.; Peng, M.; Schmidt, J. et al.
Object Type: Report
System: The UNT Digital Library
Nondestructive evaluation of ceramic matrix composite combustor components. (open access)

Nondestructive evaluation of ceramic matrix composite combustor components.

Combustor liners fabricated from a SiC/SiC composite were nondestructively interrogated before and after combustion rig testing. The combustor liners were inspected by X-ray, ultrasonic and thermographic techniques. In addition, mechanical test results were obtained from witness coupons, representing the as-manufactured liners, and from coupons machined from the components after combustion exposure. Thermography indications were found to correlate with reduced material properties obtained after rig testing. Microstructural examination of the SiC/SiC liners revealed the thermography indications to be delaminations and damaged fiber tows.
Date: November 8, 2002
Creator: Sun, J. G.; Verrilli, M. J.; Stephan, R.; Barnett, T. R. & Ojard, G.
Object Type: Article
System: The UNT Digital Library
North Korea's Nuclear Weapons Program (open access)

North Korea's Nuclear Weapons Program

None
Date: November 8, 2002
Creator: Niksch, Larry A.
Object Type: Report
System: The UNT Digital Library
Telecommunications: Additional Federal Efforts Could Help Advance Digital Television Transition (open access)

Telecommunications: Additional Federal Efforts Could Help Advance Digital Television Transition

A letter report issued by the General Accounting Office with an abstract that begins "The transition to broadcast digital television (DTV) will provide new television services and the improved picture quality of "high definition television." It will also allow some portions of the radiofrequency spectrum used for broadcasting to be returned for public safety and commercial uses. The Congress set December 2006 as the target date for completing the DTV transition and turning off the analog broadcast signals. However, this date can be extended if fewer than 85 percent of households in a market are able to receive the digital signals. GAO was asked to assess issues related to the DTV transition."
Date: November 8, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Texas Register, Volume 27, Number 45, Pages 10501-10674, November 8, 2002 (open access)

Texas Register, Volume 27, Number 45, Pages 10501-10674, November 8, 2002

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date: November 8, 2002
Creator: Texas. Secretary of State.
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
VA Health Care: Expanded Eligibility Has Increased Outpatient Pharmacy Use and Expenditures (open access)

VA Health Care: Expanded Eligibility Has Increased Outpatient Pharmacy Use and Expenditures

A letter report issued by the General Accounting Office with an abstract that begins "The Department of Veterans Affairs (VA) spent about $3.0 billion on its outpatient pharmacy benefit in fiscal year 2001. After VA implemented the Veterans' Health Care Eligibility Reform Act in 1999, more veterans could use VA outpatient care, including the pharmacy benefit, than before. Increased eligibility contributed to a doubling of the number of Priority 7 veterans using VA health care. Priority 7 veterans are primarily veterans with higher incomes and no service-connected disability. GAO was asked to report on Priority 7 veterans' use of the outpatient pharmacy benefit and VA's expenditures to provide this benefit. To do this, GAO reviewed VA pharmacy data on use and costs from fiscal years 1999 through 2001."
Date: November 8, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Welfare Reform: TANF Trends and Data (open access)

Welfare Reform: TANF Trends and Data

None
Date: November 8, 2002
Creator: Burke, Vee
Object Type: Report
System: The UNT Digital Library
Welfare Reform: TANF Trends and Data (open access)

Welfare Reform: TANF Trends and Data

The size and character of U.S. family cash welfare rolls and the composition of welfare spending have changed markedly since August, 1996, when Congress created the time-limited and work-conditioned block grant program of Temporary Assistance for Needy Families (TANF). Enrollment has plunged more than 50%. The share of recipients who combine welfare and work has risen sharply (from 11% to 26%). The share of “child-only”cases, which are free of work and time limit rules, has climbed above one-third nationally and in nine states exceeds one-half of all TANF cases.
Date: November 8, 2002
Creator: Burke, Vee
Object Type: Report
System: The UNT Digital Library
Catastrophe Insurance Risks: The Role of Risk-Linked Securities (open access)

Catastrophe Insurance Risks: The Role of Risk-Linked Securities

Testimony issued by the General Accounting Office with an abstract that begins "Because of population growth, resulting real estate development, and rising real estate values in hazard-prone areas, our nation is increasingly exposed to higher property casualty losses--both insured and uninsured--from natural catastrophes than in the past. In the 1990s, a series of natural disasters, including Hurricane Andrew and the Northridge earthquake, raised questions about the adequacy of the insurance industry's financial capacity to cover large catastrophes without limiting coverage or raising premiums. Recognizing this greater exposure and responding to concerns about insurance market capacity, participants in the insurance industry and capital markets have developed new capital market instruments as an alternative to traditional property-casualty reinsurance, or insurance for insurers. GAO's objectives were to (1) describe catastrophe risk and how the insurance and capital markets provide coverage against such risks; (2) describe how risk-linked securities, particularly catastrophe bonds, are structured; and (3) analyze how key regulatory, accounting, tax, and investor issues might affect the use of risk-linked securities."
Date: October 8, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Caustic-Side Solvent Extraction: Chemical and Physical Properties of the Optimized Solvent (open access)

Caustic-Side Solvent Extraction: Chemical and Physical Properties of the Optimized Solvent

This work was undertaken to optimize the solvent used in the Caustic Side Solvent Extraction (CSSX) process and to measure key chemical and physical properties related to its performance in the removal of cesium from the alkaline high-level salt waste stored in tanks at the Savannah River Site. The need to adjust the solvent composition arose from the prior discovery that the previous baseline solvent was supersaturated with respect to the calixarene extractant. The following solvent-component concentrations in Isopar{reg_sign} L diluent are recommended: 0.007 M calix[4]arene-bis(tert-octylbenzo-crown-6) (BOBCalixC6) extractant, 0.75 M 1-(2,2,3,3-tetrafluoropropoxy)-3-(4-sec-butylphenoxy)-2-propanol (Cs-7SB) phase modifier, and 0.003 M tri-n-octylamine (TOA) stripping aid. Criteria for this selection included BOBCalixC6 solubility, batch cesium distribution ratios (D{sub Cs}), calculated flowsheet robustness, third-phase formation, coalescence rate (dispersion numbers), and solvent density. Although minor compromises within acceptable limits were made in flowsheet robustness and solvent density, significant benefits were gained in lower risk of third-phase formation and lower solvent cost. Data are also reported for the optimized solvent regarding the temperature dependence of D{sub Cs} in extraction, scrubbing, and stripping (ESS); ESS performance on recycle; partitioning of BOBCalixC6, Cs-7SB, and TOA to aqueous process solutions; partitioning of organic anions; distribution of metals; solvent phase separation at …
Date: October 8, 2002
Creator: Delmau, L. H.
Object Type: Report
System: The UNT Digital Library