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Heavy leptons at the SSC

Description: It is argued that detection of heavy leptons at the Superconducting Super Collider seems to be very difficult but perhaps not impossible. The feasibility is shown to depend critically upon the ability to identify events with W's decaying hadronically and missing transverse momentum. (LEW)
Date: December 15, 1987
Creator: Anderson, G. & Hinchliffe, I.
Partner: UNT Libraries Government Documents Department
open access

Occurrence and use of complex resonances (poles in scattering and radiation problems)

Description: In a wide variety of physics problems, especially those which involve wave phenomena such as in electromagnetics and acoustics, a behavior results that can be described by systems of linear (partial) differential equations. Solutions to such problems often can be expressed simply in the form of an exponential series. Some specific background material for this approach is discussed, and a variety of example applications is summarized. (WHK)
Date: December 15, 1981
Creator: Miller, E. K.
Partner: UNT Libraries Government Documents Department
open access

Localized or Systemic {italic In Vivo} Heat-Inactivation of Human Immunodeficiency Virus (HIV): A Mathematical Analysis

Description: Temperatures as low as 42 C, maintained for a little as 25 minutes, inactivate {approx}25% of HIV. Furthermore, human immunodeficiency virus (HIV)-infected T-cells are more sensitive to heat than healthy lymphocytes and susceptibility increases when the cells are pre-sensitized by exposure to tumor necrosis factor. Thus, induction of a whole-body hyperthermia, or hyperthermia specifically limited to tissues having a high viral load, are potential antiviral therapies for acquired immunodeficienc… more
Date: December 15, 1993
Creator: Pennypacker, Carl R.; Perelson, A.S.; Nys, N.; Nelson, G. & Sessler, D.I.
Partner: UNT Libraries Government Documents Department
open access

Soft Error Vulnerability of Iterative Linear Algebra Methods

Description: Devices become increasingly vulnerable to soft errors as their feature sizes shrink. Previously, soft errors primarily caused problems for space and high-atmospheric computing applications. Modern architectures now use features so small at sufficiently low voltages that soft errors are becoming significant even at terrestrial altitudes. The soft error vulnerability of iterative linear algebra methods, which many scientific applications use, is a critical aspect of the overall application vulner… more
Date: December 15, 2007
Creator: Bronevetsky, G & de Supinski, B
Partner: UNT Libraries Government Documents Department
open access

The Product Consistency Test How and Why It Was Developed

Description: The Product Consistency Test (PCT), American Society for Testing Materials (ASTM) Standard C1285, is currently used world wide for testing glass and glass-ceramic waste forms for high level waste (HLW), low level waste (LLW), and hazardous wastes. Development of the PCT was initiated in 1986 because HLW glass waste forms required extensive characterization before actual production began and required continued characterization during production ({ge}25 years). Non-radioactive startup was in 1994… more
Date: December 15, 2008
Creator: Jantzen, Carol M. & Bibler, Ned E.
Partner: UNT Libraries Government Documents Department
open access

Smart Libraries: Best SQE Practices for Libraries with an Emphasis on Scientific Computing

Description: As scientific computing applications grow in complexity, more and more functionality is being packaged in independently developed libraries. Worse, as the computing environments in which these applications run grow in complexity, it gets easier to make mistakes in building, installing and using libraries as well as the applications that depend on them. Unfortunately, SQA standards so far developed focus primarily on applications, not libraries. We show that SQA standards for libraries differ fr… more
Date: December 15, 2004
Creator: Miller, M C; Reus, J F; Matzke, R P; Koziol, Q A & Cheng, A P
Partner: UNT Libraries Government Documents Department
open access

An In-situ method for the study of strain broadening usingsynchrotronx-ray diffraction

Description: A tensonometer for stretching metal foils has beenconstructed for the study of strain broadening in x-ray diffraction lineprofiles. This device, which is designed for use on the powderdiffractometer in Station 2.3 at Daresbury Laboratory, allows in-situmeasurements to be performed on samples under stress. It can be used fordata collection in either transmission or reflection modes using eithersymmetric or asymmetric diffraction geometries. As a test case,measurements were carried out on a 18mum… more
Date: December 15, 2006
Creator: Tang, Chiu C.; Lynch, Peter A.; Cheary, Robert W. & Clark, Simon M.
Partner: UNT Libraries Government Documents Department
open access

Dynamic Stark Effect and Forbidden-Transition Spectral Lineshapes

Description: We report on an experimental and theoretical study of thedynamic (ac) Stark effect on a for bidden transition. A general frameworkfor parameterizing and describing off-resonant ac-Stark shifts ispresented. A model is developed to calculate spectral line shapesresulting from resonant excitation of atoms in an intense standinglight-wave in the presence of off-resonant ac-Stark shifts. The model isused in the analysis and interpretation of a measurement of the ac-Starkshifts of the static-electric… more
Date: December 15, 2005
Creator: Stalnaker, Jason E.; Budker, D.; Freedman, S. J.; Guzman, J. S.; Rochester, S. M. & Yashchuk, V. V.
Partner: UNT Libraries Government Documents Department
open access

[Draft minutes of IAPG Mechanical Working Group meeting]

Description: This report provides the draft minutes of the Interagency Advanced Power Group meeting held November 3--4, 1993. Topics addressed are: Materials for thermal management; photovoltaic programs in the Airforce; ground based radar advanced power system development program; battery research; generator prognostics & diagnostics equipment; a thermal flight experiment test program; power systems assessment; Overview: Phillip`s space thermal technologies branch; and development of actuator thermal manag… more
Date: December 15, 1993
Creator: Skinner, D. M.
Partner: UNT Libraries Government Documents Department
open access

The PHENIX experiment at RHIC

Description: Later this decade the Relativistic Heavy Ion Collider (RHIC) will be built at Brookhaven National Laboratory. Its goal will be to accelerate and collide Au beams at 100 GeV/c in an attempt to create a Quark Gluon Plasma (QGP). The PHENIX detector aims to detect the QGP through its leptonic and hadronic signatures. We describe here its physics capabilities and the details of the apparatus designed to pick out rare leptonic signatures from among hadronic multiplicities of up to 1500 particles per… more
Date: December 15, 1993
Creator: Tonse, S. R. & Thomas, J. H.
Partner: UNT Libraries Government Documents Department
open access

Laboratory performance testing of an extruded bitumen containing a surrogate, sodium nitrate-based, low-level aqueous waste

Description: Laboratory results of a comprehensive, regulatory performance test program, utilizing an extruded bitumen and a surrogate, sodium nitrate-based waste, have been compiled at the Oak Ridge National Laboratory (ORNL). Using a 53 millimeter, Werner and Pfleiderer extruder, operated by personnel of WasteChem Corporation of Paramus, New Jersey, laboratory-scale, molded samples of type three, air blown bitumen were prepared for laboratory performance testing. A surrogate, low-level, mixed liquid waste… more
Date: December 15, 1986
Creator: Mattus, A. J. & Kaczmarsky, M. M.
Partner: UNT Libraries Government Documents Department
open access

Analysis of Bulk DKDP Damage Distribution, Obscuration and Pulse Length Dependence

Description: Recent LLNL experiments reported elsewhere at this conference explored the pulselength dependence of 351 nm bulk damage incidence in DKDP. The results found are consistent, in part, with a model in which a distribution of small bulk initiators is assumed to exist in the crystal and the damage threshold is determined by reaching a critical temperature. The observed pulse length dependence can be explained as being set by the most probable defect capable of causing damage at a given pulselength. … more
Date: December 15, 2000
Creator: Feit, M D; Rubenchik, A M & Runkel, M
Partner: UNT Libraries Government Documents Department
open access

A Hierarchical Control Architecture for a PEBB-Based ILC Marx Modulator

Description: The idea of building power conversion systems around Power Electronic Building Blocks (PEBBs) was initiated by the U.S. Office of Naval Research in the mid 1990s. A PEBB-based design approach is advantageous in terms of power density, modularity, reliability, and serviceability. It is obvious that this approach has much appeal for pulsed power conversion including the International Linear Collider (ILC) klystron modulator application. A hierarchical control architecture has the inherent capabil… more
Date: December 15, 2011
Creator: Macken, K.; Burkhart, C.; Larsen, R.; Nguyen, M. N. & Olsen, J.
Partner: UNT Libraries Government Documents Department
open access

Modeling of fate and transport of co-injection of H2S with CO2 in deep saline formations

Description: The geological storage of CO{sub 2} in deep saline formations is increasing seen as a viable strategy to reduce the release of greenhouse gases into the atmosphere. However, costs of capture and compression of CO{sub 2} from industrial waste streams containing small quantities of sulfur and nitrogen compounds such as SO{sub 2}, H{sub 2}S and N{sub 2} are very expensive. Therefore, studies on the co-injection of CO{sub 2} containing other acid gases from industrial emissions are very important. … more
Date: December 15, 2010
Creator: Zhang, W.; Xu, T. & Li, Y.
Partner: UNT Libraries Government Documents Department
open access

Improving the Material Response for Slow Heat of Energetic Materials (U)

Description: The goal of modern high explosive slow heat cookoff modeling is to understand the level of mechanical violence. This requires understanding the coupled thermal-mechanical-chemical system that such an environment creates. Recent advances have improved our ability to predict the time to event, and we have been making progress on predicting the mechanical response. By adding surface tension to the product gas pores in the high explosive, we have been able to reduce the current model's tendency to … more
Date: December 15, 2010
Creator: Nichols, A. L.
Partner: UNT Libraries Government Documents Department
open access

Enrichment, isolation and characterization of fungi tolerant to 1-ethyl-3-methylimidazolium acetate

Description: This work aims to characterize microbial tolerance to 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]), ionic liquid that has emerged as a novel biomass pretreatment for lignocellulosic biomass. Enrichment experiments performed using inocula treated with [C2mim][OAc] under solid and liquid cultivation yielded fungal populationsdominated by Aspergilli. Ionic liquid-tolerant Aspergillus isolates from these enrichments were capable of growing in a radial plate growth assay in the presence of 10%… more
Date: December 15, 2010
Creator: Singer, S.W.; Reddy, A. P.; Gladden, J. M.; Guo, H.; Hazen, T.C.; Simmons, B. A. et al.
Partner: UNT Libraries Government Documents Department
open access

DEVELOPMENT OF SOLID COLLECTION DIAGNOSTICS ON NIF THROUGH BLAST SHIELD ANALYSIS

Description: Radiochemical analysis of post-shot debris inside the National Ignition Facility (NIF) target chamber can help determine various diagnostic parameters associated with the implosion efficiency of the fusion capsule. This capability is limited by the amount of target isotope that can be loaded inside the capsule ablator without affecting performance and the collection efficiency of the capsule debris after implosion. Prior to designing a collection system, the chemical nature and distribution of … more
Date: December 15, 2011
Creator: Gostic, J M; Shaughnessy, D A; Grant, P M; Hutcheon, I D; Lewis, L A & Moody, K J
Partner: UNT Libraries Government Documents Department
open access

Derivation of Equivalent Continuous Dilution for Cyclic, Unsteady Driving Forces

Description: This article uses an analytical approach to determine the dilution of an unsteadily-generated solute in an unsteady solvent stream, under cyclic temporal boundary conditions. The goal is to find a simplified way of showing equivalence of such a process to a reference case where equivalent dilution is defined as a weighted average concentration. This derivation has direct applications to the ventilation of indoor spaces where indoor air quality and energy consumption cannot in general be simulta… more
Date: December 15, 2010
Creator: Laboratory, Lawrence Berkeley National; Technical University of Denmark, Department of Civil Engineering; Mortensen, Dorthe K.; Walker, Iain S. & Sherman, Max H.
Partner: UNT Libraries Government Documents Department
open access

Observation of Strong Resonant Behavior in the Inverse Photoelectron Spectroscopy of Ce Oxide

Description: X-ray Emission Spectroscopy (XES) and Resonant Inverse Photoelectron Spectroscopy (RIPES) have been used to investigate the photon emission associated with the Ce3d5/2 and Ce3d3/2 thresholds. Strong resonant behavior has been observed in the RIPES of Ce Oxide near the 5/2 and 3/2 edges. Inverse Photoelectron Spectroscopy (IPES) and its high energy variant, Bremstrahlung Isochromat Spectroscopy (BIS), are powerful techniques that permit a direct interrogation of the low-lying unoccupied electron… more
Date: December 15, 2009
Creator: Tobin, J G; Yu, S W; Chung, B W; Waddill, G D; Damian, E; Duda, L et al.
Partner: UNT Libraries Government Documents Department
open access

Tunable lasers in isotope separation, a colorful view of a dye chemist

Description: Some of the problems to be encountered in the large-scale use of dye lasers in an isotope separation plant are discussed. Why should dye lasers be employed. How can dye conversion efficiency be optimized. How can dye photochemical decomposition and hence running costs be minimized and how serious is this effect anyway. What are toxicity problems with the dye. These and similar issues are examined.
Date: December 15, 1976
Creator: Hammond, P. R.
Partner: UNT Libraries Government Documents Department
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