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Top quark and light Higgs scalar mass bounds in no-scale supergravity

Description: No-scale supergravity theories with the minimal low-energy particle content are shown to become untenable for a top quark mass m/sub T/ much less than 40 GeV. For m/sub T/ < 55 GeV, a stringent upper bound operates on the mass of the lowest-lying Higgs scalar. Further, the Higgs pseudoscalar is constrained to be nearly a quarter as massive as the gluino.
Date: August 29, 1986
Creator: Roy, P.
Partner: UNT Libraries Government Documents Department
open access

Does the photino decay

Description: The stability of the lightest superpartner is a crucial aspect of many experimental searches for supersymmetry and of supersymmetric dark matter candidates. It is shown that R parity may occur in operators of dimension four or less as an accidental consequence of an exact Z/sub N/ symmetry. In this case the lightest superpartner can decay via higher dimension operators. The lifetime depends on the scale of the new physics responsible for the non-renormalizable operators; it could be anywhere in… more
Date: August 29, 1986
Creator: Hall, L.J.
Partner: UNT Libraries Government Documents Department
open access

Coil winder for the magnet of the mirror fusion test facility

Description: A coil winder was designed for the purpose of fabricating the superconducting magnets of the Mirror Fusion Test Facility. The superconducting magnets are a displaced ying-yang pair, each having major and minor radii of 2.5 and 0.75 m, respectively, and cross section of 0.42 m by about 1.03 m. The superconductor cross section is a square, 13 mm on a side, and consists of a core of niobium-titanium embedded copper and a solid copper stabilizer. Conceptual studies made at Lawrence Livermore Labora… more
Date: August 29, 1977
Creator: Ling, R.C.
Partner: UNT Libraries Government Documents Department
open access

Samanid ceramics and neutron activation analysis

Description: Glazed pottery known as ''Afrasiyab'' and ''Nishapur'' wares (early Islamic ceramics) are generally attributed to the Samanid dynasty (819-1005). The clay composition of Samanid wares and discarded kiln items found in situ were analyzed by NAA and the elemental composition compared with that of other sherds. 7 figures, 1 table. (DLC)
Date: August 29, 1977
Creator: Azarpay, G.; Frierman, J.D. & Asaro, F.
Partner: UNT Libraries Government Documents Department
open access

Ion microstability in tandem mirrors

Description: The formalism describing ion-cyclotron modes in mirror traps will be developed. Emphasis will be placed on the effects of finite axial boundaries on the normal modes of the system. Wave properties are a composite picture of: positive energy waves (plasma oscillation, shear Alfven and drift waves), negative energy waves (ion Bernstein waves in a loss-cone media), positive dissipation (electron Landau damping, outgoing waves), and negative dissipation (ion cyclotron damping in a loss-cone and ani… more
Date: August 29, 1983
Creator: Pearlstein, L.D.
Partner: UNT Libraries Government Documents Department
open access

Effects of Fe spin transition on the elasticity of (Mg,Fe)O magnesiow�ustites and implications for the seismological properties of the Earth's lower mantle

Description: High-pressure x-ray diffraction of (Mg{sub 0.8}Fe{sub 0.2})O at room temperature reveals a discontinuity in the bulk modulus at 40 ({+-}5) GPa, similar pressure at which an electronic spin-pairing transition of Fe{sup 2+} is also observed. In the x-ray diffraction experiments the transition is completed only at 80 GPa, possibly reflecting lack of equilibration. Combining recent measurements, we document anomalies in the compression curve of Mg-rich magnesiowuestites that are manifestations of t… more
Date: August 29, 2006
Creator: Speziale, S; Lee, V E; Clark, S M; Lin, J F; Pasternak, M P & Jeanloz, R
Partner: UNT Libraries Government Documents Department
open access

Highly Potent, Water Soluble Benzimidazole Antagonist for Activated (alpha)4(beta)1 Integrin

Description: The cell surface receptor {alpha}{sub 4}{beta}{sub 1} integrin, activated constitutively in lymphoma, can be targeted with the bisaryl urea peptidomimetic antagonist 1 (LLP2A). However, concerns on its preliminary pharmacokinetic (PK) profile provided an impetus to change the pharmacophore from a bisaryl urea to a 2-arylaminobenzimidazole moiety resulting in improved solubility while maintaining picomolar potency [5 (KLCA4); IC{sub 50} = 305 pM]. With exceptional solubility, this finding has po… more
Date: August 29, 2007
Creator: Carpenter, R. D.; Andrei, M.; Lau, E. Y.; Lightstone, F. C.; Liu, R.; Lam, K. S. et al.
Partner: UNT Libraries Government Documents Department
open access

A Validation of FEM3MP with Joint Urban 2003 Data

Description: Under the sponsorship of the U.S. DOE and DHS, we have recently developed a computational fluid dynamics (CFD) model for simulating airflow and dispersion of chemical/biological agents released in urban areas. Our model, FEM3MP, is based on solving the three-dimensional, time-dependent Navier-Stokes equations with appropriate physics submodels on massively parallel computer platforms. It employs finite-element discretization for effective treatment of complex geometries and a semi-implicit proj… more
Date: August 29, 2006
Creator: Chan, S T & Leach, M J
Partner: UNT Libraries Government Documents Department
open access

Magnetic structure near the Co/NiO(001) interface

Description: We investigate the magnetic coupling at the Co/NiO interface using soft x-ray magnetic linear dichroism (XMLD) and circular dichroism taking explicitly into account the recently observed angular dependence of the XMLD with respect to the crystallographic axes. We find that the Co moments are aligned perpendicular to the NiO moments. We discuss the impact of the anisotropic XMLD on the intensity ratio of the two peaks at the Ni L{sub 2} edge, which is commonly employed to determine the spin orie… more
Date: August 29, 2008
Creator: Arenholz, Elke; van der Laan, Gerrit & Nolting, Frithjof
Partner: UNT Libraries Government Documents Department
open access

The Color Glass Condensate and the Glasma: Two Lectures.

Description: These two lectures concern the Color Glass Condensate and the Glasma. These are forms of matter which might be studied in high energy hadronic collisions. The Color Glass Condensate is high energy density gluonic matter. It constitutes the part of a hadron wave function important for high energy processes. The Glasma is matter produced from the Color Glass Condensate in the first instants after a collision of two high energy hadrons. Both types of matter are associated with coherent fields. The… more
Date: August 29, 2007
Creator: McLerran, L.
Partner: UNT Libraries Government Documents Department
open access

Establishing Ergonomics in Industrially Developing Countries

Description: The introduction of ergonomics is an ongoing effort in industrially developing countries and will ultimately require an organized, programmatic approach spanning several countries and organizations. Our preliminary efforts with our partner countries of Viet Nam, Thailand, and Nicaragua have demonstrated that a one-time course is just the first step in a series of necessary events to provide skills and create an infrastructure that will have lasting impact for the host country. To facilitate tha… more
Date: August 29, 2005
Creator: Stewart, K.; Silverstein, B. & Kiefer, M.
Partner: UNT Libraries Government Documents Department
open access

Collider Signals Of Top Quark Flavor Violation From A Warped ExtraDimension

Description: We study top quark flavor violation in the framework of a warped extra dimension with the Standard Model (SM) fields propagating in the bulk. Such a scenario provides solutions to both the Planck-weak hierarchy problem and the flavor puzzle of the SM without inducing a flavor problem. We find that, generically, tcZ couplings receive a huge enhancement, in particular the right handed ones can be {Omicron}(1%). This results in BR (t {yields} cZ) at or above the sensitivity of the Large Hadron Col… more
Date: August 29, 2006
Creator: Agashe, Kaustubh; Perez, Gilad & Soni, Amarjit
Partner: UNT Libraries Government Documents Department
open access

High-Resolution UV Relay Lens for Particle Size Distribution Measurements Using Holography

Description: Shock waves passing through a metal sample can produce ejecta particulates at a metal-vacuum interface. Holography records particle size distributions by using a high-power, short-pulse laser to freeze particle motion. The sizes of the ejecta particles are recorded using an in-line Fraunhofer holography technique. Because the holographic plate would be destroyed in an energetic environment, a high-resolution lens has been designed to relay the interference fringes to a safe environment. Particl… more
Date: August 29, 2008
Creator: Malone, Robert M.; Capelle, Gene A.; Frogget, Brent C.; Grover, Mike; Kaufman, Morris I.; Pazuchanics, Peter et al.
Partner: UNT Libraries Government Documents Department
open access

Using a Quasipotential Transformation for Modeling Diffusion Media inPolymer-Electrolyte Fuel Cells

Description: In this paper, a quasipotential approach along with conformal mapping is used to model the diffusion media of a polymer-electrolyte fuel cell. This method provides a series solution that is grid independent and only requires integration along a single boundary to solve the problem. The approach accounts for nonisothermal phenomena, two-phase flow, correct placement of the electronic potential boundary condition, and multilayer media. The method is applied to a cathode diffusion medium to explor… more
Date: August 29, 2008
Creator: Weber, Adam Z. & Newman, John
Partner: UNT Libraries Government Documents Department
open access

High Relaxivity Gadolinium Hydroxypyridonate-Viral Capsid Conjugates: Nano-sized MRI Contrast Agents

Description: High relaxivity macromolecular contrast agents based on the conjugation of gadolinium chelates to the interior and exterior surfaces of MS2 viral capsids are assessed. The proton nuclear magnetic relaxation dispersion (NMRD) profiles of the conjugates show up to a five-fold increase in relaxivity, leading to a peak relaxivity (per Gd{sup 3+} ion) of 41.6 mM{sup -1}s{sup -1} at 30 MHz for the internally modified capsids. Modification of the exterior was achieved through conjugation to flexible l… more
Date: August 29, 2007
Creator: Meux, Susan C.; Datta, Ankona; Hooker, Jacob M.; Botta, Mauro; Francis, Matthew B.; Aime, Silvio et al.
Partner: UNT Libraries Government Documents Department
open access

Three-dimensional equilibrium in quadrupole symmetric tandem mirrors in the paraxial limit (reduced MHD)

Description: Equilibrium in quadrupole symmetric mirrors is fully three dimensional; however, because axial scale lengths are long compared with radial scale lengths (equivalently weak curvature) it is possible to reduce the complexity of the equations by expanding in the appropriate smallness parameter. Such a procedure leads to set of reduced MHD equations. The general theory will be presented, numerical results discussed, modifications due to finite Larmor radius will be added, and an analytic solution f… more
Date: August 29, 1983
Creator: Pearlstein, L.D.
Partner: UNT Libraries Government Documents Department
open access

Thermal barriers: their purpose and functioning

Description: This review covers the following topics: (1) thermal barrier formation, (2) ion pumping, (3) high-field throttle coil, and (4) microstability. (MOW)
Date: August 29, 1983
Creator: Baldwin, D.E.
Partner: UNT Libraries Government Documents Department
open access

Microprocessor-controlled portable neutron spectrometer

Description: A neutron spectrometer that acquires and unfolds data in the field has been developed for use in the energy range from 1 to 20 MeV. The system includes an NE213 organic scintillation detector, automatic gain stabilization, automatically stabilized pulseshape discrimination, an LSl-11 microprocessor for control and data reduction, and a multichannel analyzer for data acquisition. The system, with the exception of the multichannel analyzer, is mounted in a suitcase 47 by 66 by 23.5 cm. The mass i… more
Date: August 29, 1979
Creator: Hunt, G. F.; Kaifer, R. C.; Slaughter, D. R.; Strout, R. E., II & Rueppel, D. W.
Partner: UNT Libraries Government Documents Department
open access

Recent progress in heavy-ion fusion in the US

Description: Recent developments in accelerator physics and technology have led to lower cost estimates for a heavy-ion induction linac driver. Studies show that the cost of electricity produced using such a driver are competitive with other fusion systems at a plant capacity of 1.2 GW/sub e/ and are competitive with projected fission power costs at less than 4 GW/sub e/.
Date: August 29, 1986
Creator: Bangerter, R.O.
Partner: UNT Libraries Government Documents Department
open access

Effect of non-heterogeneous wetwell boundaries on pressure suppression system response. [BWR]

Description: The Full-Scale Mark II CRT (Containment Response Test) Program is in progress at the Tokai-Mura Establishment of the Japan Atomic Energy Research Institute (JAERI). The primary objective of the on-going CRT Program is to provide a data base for evaluation of the pressure suppression pool (wetwell) hydrodynamic loads associated with a postulated loss-of-coolant accident (LOCA) in the BWR Mark II containment system. The test facility is 1/18 of full scale in volume and has a wetwell which is a fu… more
Date: August 29, 1980
Creator: McCauley, E.W.; Holman, G.S.; Namatame, K.; Kukita, Y. & Shiba, M.
Partner: UNT Libraries Government Documents Department
open access

Absolute dipole gamma-ray strength functions for /sup 176/Lu

Description: We have derived absolute dipole strength-function information for /sup 176/Lu from an average resonance capture study of /sup 175/Lu with 2-keV neutrons, and from neutron capture cross-section measurements with neutrons from 30 keV to about 1 MeV. We found that we needed to increase our previous estimate of the relative M1/E1 strengths near 5 MeV by a factor of 3, and to revise downward the absolute magnitude of our E1 strength function. We accomplished the latter, while still maintaining conti… more
Date: August 29, 1984
Creator: Gardner, D. G.; Gardner, M. A. & Hoff, R. W.
Partner: UNT Libraries Government Documents Department
open access

Isomer ratio calculations using modeled discrete levels

Description: We have calculated isomer ratios for the /sup 175/Lu(n,..gamma..), /sup 175/Lu(n,2n), /sup 237/Np(n,2n), /sup 241/Am(n,..gamma..), and /sup 243/Am(n,..gamma..) reactions using modeled level structures in the deformed, odd-odd product nuclei. We find: that the hundreds of discrete levels and their gamma-ray branching ratios provided by the modeling are necessary to achieve agreement with experiment, that many rotational bands must be included in order to obtain a sufficiently representative sele… more
Date: August 29, 1984
Creator: Gardner, M. A.; Gardner, D. G. & Hoff, R. W.
Partner: UNT Libraries Government Documents Department
open access

Tormac experimental apparatus

Description: A brief review of the Tormac program is given. The Tormac IV, Tormac V, and puffer experiments are mentioned. (MOW)
Date: August 29, 1978
Creator: Levine, M. A. & Myers, B. R.
Partner: UNT Libraries Government Documents Department
open access

Meshes: The next generation

Description: Building complex meshes for large-scale numerical simulations presents immense difficulties in exploiting high-performance computers. Industry and research leaders will describe the current state of the art for generating meshes for such large scientific problems. This will be followed by a panel and general audience discussion of the algorithmic and architectural issues surrounding the generation of meshes with10{sup 7} to 10{sup 9} grid points. (Note: The terms ``mesh`` and ``grid`` are used … more
Date: August 29, 1994
Creator: Christon, M.; Hardin, D.; Compton, J. & Zosel, M.
Partner: UNT Libraries Government Documents Department
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