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Computer Security: Progress Made, But Critical Federal Operations and Assets Remain at Risk

Description: Testimony issued by the General Accounting Office with an abstract that begins "Protecting the computer systems that support our critical operations and infrastructures has never been more important because of the concern about attacks from individuals and groups with malicious intent, including terrorism. These concerns are well founded for a number of reasons, including the dramatic increases in reported computer security incidents, the ease of obtaining and using hacking tools, the steady ad… more
Date: November 19, 2002
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Interactive View-Dependent Rendering of Large Isosurfaces

Description: We present an algorithm for interactively extracting and rendering isosurfaces of large volume datasets in a view-dependent fashion. A recursive tetrahedral mesh refinement scheme, based on longest edge bisection, is used to hierarchically decompose the data into a multiresolution structure. This data structure allows fast extraction of arbitrary isosurfaces to within user specified view-dependent error bounds. A data layout scheme based on hierarchical space filling curves provides access to t… more
Date: November 19, 2002
Creator: Gregorski, B; Duchaineau, M; Lindstrom, P; Pascucci, V & Joy, K I
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Influence of Carbon on the Electrical Properties of Crustal Rocks

Description: The report summarizes work to determine the nature and distribution of carbon on microcracks in crystalline rocks by time-of-flight secondary ion mass spectroscopy. It also summarizes the results of a workshop devoted to investigating how carbon in rocks influences electrical conductivity and whether carbon on fracture surfaces can account for the electrical conductivity structure of the crust.
Date: November 19, 2002
Creator: Mathez, E. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Form CJ-7, Annual Parole Survey: 2002

Description: Blank parole data survey containing a series of questions related to the parole population in a particular location, with instructions for filling out the survey.
Date: November 19, 2002
Creator: United States. Bureau of Justice Statistics.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

The new cosmology

Description: Over the past three years we have determined the basic features of our Universe. It is spatially flat; accelerating; comprised of 1/3 a new form of matter, 2/3 a new form of energy, with some ordinary matter and a dash of massive neutrinos; and it apparently began from a great burst of expansion during which quantum noise was stretched to astrophysical size seeding cosmic structure. This ''New Cosmology'' greatly extends the highly successful hot big-bang model. Now we have to make sense of it.… more
Date: November 19, 2002
Creator: Turner, Michael S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Condition for production of circulating proton beam with intensity greater than space charge limit.

Description: Transverse e-p instability in proton rings could be damped by increasing the beam density and the rate of secondary particles production above the threshold level, with the corresponding decrease of unstable wavelength {lambda} below the transverse beam size h (increase of beam density n{sub b} and ion density n{sub i} above the threshold level: n{sub b} + n{sub i} > {beta}{sup 2}/(r{sub e} h{sup 2}), where r{sub e} = e{sup 2}/mc{sup 2}). Such island of stability can be reached by a fast cha… more
Date: November 19, 2002
Creator: Dudnikov, Vadim
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Dark matter and dark energy: The critical questions

Description: Stars account for only about 0.5% of the content of the Universe; the bulk of the Universe is optically dark. The dark side of the Universe is comprised of: at least 0.1% light neutrinos; 3.5% {+-} 1% baryons; 29% {+-} 4% cold dark matter; and 66% {+-} 6% dark energy. Now that we have characterized the dark side of the Universe, the challenge is to understand it. The critical questions are: (1) What form do the dark baryons take? (2) What is (are) the constituent(s) of the cold dark matter? (3)… more
Date: November 19, 2002
Creator: Turner, Michael S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Summary of radiation damage studies on rare earth permanent magnets

Description: With the proposed use of permanent magnets for both the NLC and the VLHC the issue flux loss due to radiation damage needs to be fully understood. There exist many papers on the subject. There are many difficulties in drawing conclusions from all of these data. First there is the difference methods of dosimetry, second different types of magnets and magnetic arrangements, and third different manufacturers of magnet material. This paper provides a summary of the existing literature on the subjec… more
Date: November 19, 2002
Creator: Volk, J. T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Time-Resolved Sequence Analysis on High Density Fiberoptic DNA Probe

Description: A universal array format has been developed in which all possible n-mers of a particular oligonucleotide sequence can be represented. The ability to determine the sequence of the probes at every position in the array should enable unbiased gene expression as well as arrays for de novo sequencing.
Date: November 19, 2002
Creator: Walt, D. R. & Lee, K. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Yucca Mountain Project Subsurface Facilities Design

Description: Four units of the Topopah Springs formation (volcanic tuff) are considered for the proposed repository: the upper lithophysal, the middle non-lithophysal, the lower lithophysal, and the lower non-lithophysal. Yucca Mountain was recently designated the site for a proposed repository to dispose of spent nuclear fuel and high-level radioactive waste. Work is proceeding to advance the design of subsurface facilities to accommodate emplacing waste packages in the proposed repository. This paper summ… more
Date: November 19, 2002
Creator: Linden, A.; Saunders, R. S.; Boutin, R. J.; Harrington, P. G.; Lachman, K. D. & Trautner, L. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Making sense of the new cosmology

Description: Over the past three years we have determined the basic features of the Universe--spatially flat; accelerating; comprised of 1/3 a new form of matter, 2/3 a new form of energy, with some ordinary matter and a dash of massive neutrinos; and apparently born from a burst of rapid expansion during which quantum noise was stretched to astrophysical size seeding cosmic structure. The New Cosmology greatly extends the highly successful hot big-bang model. Now we have to make sense of all this: What is … more
Date: November 19, 2002
Creator: Turner, Michael S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A cost optimized small aperture 2 in 1 VLHC

Description: The costing algorithm used here was started at the time of the SSC proposal, was updated and presented at the Port Jefferson VLHC meeting in october 2000, and has been slightly modified again for this study. The method starts from a specified central field and aperture, and uses approximate formulae to design the dipole magnet cross sections. The required masses of superconductor, stabilizing copper, support stainless steel, and yoke are calculated, and the surface area of the cold mass determi… more
Date: November 19, 2002
Creator: Palmer, R. B.; Parker, B. & Foster, G. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Eliminating Islands in High-pressure Free-boundary Stellarator Magnetohydrodynamic Equilibrium Solutions

Description: Magnetic islands in free-boundary stellarator equilibria are suppressed using a procedure that iterates the plasma equilibrium equations and, at each iteration, adjusts the coil geometry to cancel resonant fields produced by the plasma. The coils are constrained to satisfy certain measures of engineering acceptability and the plasma is constrained to ensure kink stability. As the iterations continue, the coil geometry and the plasma simultaneously converge to an equilibrium in which the island … more
Date: November 19, 2002
Creator: Hudson, S. R.; Monticello, D. A.; Reiman, A. H.; Boozer, A. H.; Strickler, D. J.; Hirshman, S. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling Groundwater Flow and Transport of Radionuclides at Amchitka Island's Underground Nuclear Tests: Milrow, Long Shot, and Cannikin

Description: Since 1963, all United States nuclear tests have been conducted underground. A consequence of this testing has been the deposition of large amounts of radioactive material in the subsurface, sometimes in direct contact with groundwater. The majority of this testing occurred on the Nevada Test Site (NTS), but a limited number of experiments were conducted in other locations. One of these locations, Amchitka Island, Alaska is the subject of this report. Three underground nuclear tests were conduc… more
Date: November 19, 2002
Creator: Hassan, Ahmed; Pohlmann, Karl & Chapman, Jenny
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Erosion Analysis for the Misaligned U2 Nozzle and its Connector Block

Description: In support of an erosion evaluation for the misaligned mating surfaces of the U2 nozzle and its connector block in the 3H evaporator lift-separator jumper, the Engineering Modeling and Simulation Group (EMSG) has developed computational models to identify potential sites of high erosion. Two mechanisms were considered to evaluate high erosion locations representative of the actual flow process in the misaligned U2 nozzle, abrasive erosion which occurs by high wall shear of viscous liquid film, … more
Date: November 19, 2002
Creator: Lee, Si Young
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Report of the subgroup on alternative models and new ideas

Description: We summarize some of the work done by the P3 subgroup on Alternative Models and New Ideas. The working group covered a broad range of topics including a constrained Standard Model from an extra dimension, a discussion of recent ideas addressing the strong CP problem, searches for doubly charged higgs bosons in e{gamma} collisions, and an update on discovery limits for extra neutral gauge bosons at hadron colliders. The breadth of topics rejects the many ideas and approaches to physics beyond th… more
Date: November 19, 2002
Creator: Chertok, M.; Dienes, K.; Godfrey, S.; Kalyniak, P.; Kaplan, D.; Kribs, G. D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Modification of the Coherence Properties of a Laser Beam Propagating through a Plasma and its Consequences for Stimulated Scattering Instabilities

Description: The control of coherence is a critical issue for the high-power lasers used in inertial confinement fusion (ICF). The level of coherence is an important parameter for the control of the light intensity distribution as well as the growth rate of parametric instabilities. Over the past few years, experimental and theoretical studies have evidenced the ability of an underdense plasma to reduce the spatial and temporal coherence of an intense laser beam propagating through it. As any process affect… more
Date: November 19, 2002
Creator: Labaune, C.; Baldis, H. A.; Bandulet, H.; Depierreux, S.; Fuchs, J.; Michel, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Undecimated Wavelet Transforms for Image De-noising

Description: A few different approaches exist for computing undecimated wavelet transform. In this work we construct three undecimated schemes and evaluate their performance for image noise reduction. We use standard wavelet based de-noising techniques and compare the performance of our algorithms with the original undecimated wavelet transform, as well as with the decimated wavelet transform. The experiments we have made show that our algorithms have better noise removal/blurring ratio.
Date: November 19, 2002
Creator: Gyaourova, A; Kamath, C & Fodor, I K
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Health Insurance: Uninsured by State, 2001

Description: An estimated 14.6% of the U.S. populations lacked health insurance coverage in 2001, up from 14% in 2000. When examined by state, estimates of the percent uninsured ranged from a low of 7.5% in Iowa to a high of 23.5% in Texas. Generally, states in the Midwest and New England have lower rates of uninsured, while states in the Southwestern and Southern portion of the nation have higher shares of their populations without coverage.
Date: November 19, 2002
Creator: Morgan, Paulette C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cross-Section Measurements with the Radioactive Isotope Accelerator (RIA)

Description: RIA will produce beams of exotic nuclei of unprecedented luminosity. Preliminary studies of the feasibility of measuring cross-sections of interest to the science based stockpile stewardship (SBSS) program will be presented, and several experimental techniques will be discussed. Cross-section modeling attempts for the A = 95 mass region will be shown. In addition, several radioactive isotopes could be collected for target production or medical isotope purposes while the main in-beam experiments… more
Date: November 19, 2002
Creator: Stoyer, M A; Moody, K J; Wild, J F; Patin, J B; Shaughnessy, D A; Stoyer, N J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

FY02 CBNP Annual Report: Discovery of DNA Signature of Biothreat Detection Using Suppression Subtractive Hybridization

Description: Our goal is to develop robust DNA signatures for rapid and specific DNA-based detection platforms that can be employed by CBNP to detect a wide range of potential agents. Our approach has resulted in highly specific DNA signatures for Yersina pestis, Bacillus anthracis and Brucella species. Furthermore, this approach can be applied to any genome (even uncharacterized ones), which facilitates DNA signature development for detection of newly emerging pathogens. We are using suppression subtractiv… more
Date: November 19, 2002
Creator: Andersen, G L & Radnedge, L
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hierarchical Representation of Time-Varying Volume Data with Fourth-Root-of-Two Subdivision and Quadrilinear B-Spline Wavelets

Description: Multiresolution methods for representing data at multiple levels of detail are widely used for large-scale two- and three-dimensional data sets. We present a four-dimensional multiresolution approach for time-varying volume data. This approach supports a hierarchy with spatial and temporal scalability. The hierarchical data organization is based on 4{radical}2 subdivision. The n{radical}2-subdivision scheme only doubles the overall number of grid points in each subdivision step. This fact leads… more
Date: November 19, 2002
Creator: Linsen, Lars; Pascucci, Valerio; Duchaineau, Mark A.; Hamann, Bernd & Joy, Kenneth I.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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