694 Matching Results

Search Results

Results: 1 - 24 next
open access

[The North Texan, Vol. 44 No. 4, December 1994]

Description: A clipping from The North Texan, Vol. 44 No. 4, of an article written by Cass Brunner. The focus of the piece is Dr. R. William McCarter and his time at UNT. He is the recipient of the 1994 Higher Education Art Educator of the Year, given by the Texas Art Education Association.
Date: December 1994
Creator: Brunner, Cass
Partner: UNT Libraries Special Collections
open access

[The Dallas Morning News, December 25, 1994]

Description: An article in The Dallas Morning News that was written by Shermakaye Bass that discusses different university programs and art groups. The UNT NTIEVA and Dallas Museum of Art pairing is one of the featured groups.
Date: December 25, 1994
Creator: Bass, Shermakaye
Partner: UNT Libraries Special Collections
open access

Disilene Addition to C{sub 70}

Description: Semiempirical and ab initio Hartree Fock computational results indicate that the highly reactive dienophile tetramethyldisilene, Me{sub 2}Si=SiMe{sub 2}, is an excellent candidate for a novel functionalization of the equator of C{sub 70} via a [2+4] cycloaddition to the 21, 22, 23, 42 carbons. Thermal or photochemical generation of tetramethyldisilene in the presence of C{sub 70} results in similar complex mixtures in which the major product appears to be that of [2+2] cycloaddition to the 7,8 … more
Date: December 31, 1994
Creator: Jacobs, S. J.; Cahill, P. A. & Rohlfing, C. M.
Partner: UNT Libraries Government Documents Department
open access

B-Physics results from D0

Description: We report on preliminary measurements of the inclusive single muon and dimuon cross sections in p{bar p} collisions at {radical}s = 1.8 TeV using the D0 detector at the Fermilab collider. From these results, we extract the cross section for b-quark production for the kinematic range {vert_bar}yb{vert_bar} < 1.0 and 6 < p{sub t}{sup b} < 50 GeV/c. We also report measurements on the J/{psi} production, and correlations between muons in dimuon events.
Date: December 1, 1994
Creator: Hedin, D. & Markosky, L.
Partner: UNT Libraries Government Documents Department
open access

Flat panel display development activities at Sandia National Laboratories

Description: The flat panel display development activities underway at Sandia National Laboratories are described. Research is being conducted in the areas of glass substrates, phosphors, large area processes, and electron emissions. Projects are focused on improving process yield, developing large area processes, and using modeling techniques to predict design performance.
Date: December 31, 1994
Creator: DiBello, E. G.; Worobey, W.; Burchett, S.; Hareland, W.; Felter, T. & Mays, B.
Partner: UNT Libraries Government Documents Department
open access

The role of the LLNL Atmospheric Release Advisory Capability in a FRMAC response to a nuclear power plant incident

Description: The Federal Radiological Emergency Response Plan (FRERP) can provide several emergency response resources in response to a nuclear power plant (NPP) accident if requested by a state or local agency. The primary FRERP technical resources come from the US Department of Energy`s (DOE) Federal Radiological Monitoring and Assessment Center (FRMAC). Most of the FRMAC assets are located at the DOE Remote Sensing Laboratory (RSL) at Nellis Air Force Base, Las Vegas, Nevada. In addition, the primary atm… more
Date: December 31, 1994
Creator: Baskett, R. L.; Sullivan, T. J.; Ellis, J. S. & Foster, C. S.
Partner: UNT Libraries Government Documents Department
open access

Study of parity and time reversal violation in neutron-nucleus interactions

Description: The parity and time-reversal symmetries can be studies in neutron-nucleus interactions. Parity non-conserving asymmetries have been observed for many p-wave resonances in a compound nucleus and measurements were performed on several nuclei in the mass region of A{approximately}100 and A{approximately}230. The statistical model of the compound nucleus provides a theoretical basis for extracting mean-squared matrix elements from the experimental asymmetry data, and for interpreting the mean-squar… more
Date: December 31, 1994
Creator: Yen, Yi-Fen; Bowman, J. D.; Frankle, C. M. & Crawford, B. E.
Partner: UNT Libraries Government Documents Department
open access

Accelerator-based systems for plutonium destruction and nuclear waste transmutation

Description: Accelerator-base systems are described that can eliminate long-lived nuclear materials. The impact of these systems on global issues relating to plutonium minimization and nuclear waste disposal can be significant. An overview of the components that comprise these systems is given, along with discussion of technology development status and needs. A technology development plan is presented with emphasis on first steps that would demonstrate technical performance.
Date: December 31, 1994
Creator: Arthur, E. D.
Partner: UNT Libraries Government Documents Department
open access

Technical evaluation of a dual-junction same-band-gap amorphous silicon photovoltaic system at NREL

Description: On December 7, 1992, a 1.8-kW{sub ac} utility-interconnect photovoltaic (PV) system using amorphous silicon modules was brought on-line at the National Renewable Energy Laboratory`s photovoltaic test site. This system was deployed to conduct an in-situ technical evaluation of the PV array (in a high voltage configuration) and system performance and reliability in a utility-interconnect application. The system is unique due to the installation of construction-grade insulation on the back of each… more
Date: December 1, 1994
Creator: Strand, T.; Mrig, L.; Hansen, R. & Emery, K.
Partner: UNT Libraries Government Documents Department
open access

Gamma-ray measurements at the WNR white neutron source

Description: Photon production data have been acquired in the incident neutron energy range, 1 < E{sub n} < 400 MeV, for a number of target nuclei, gamma-ray energy ranges, and reactions, using the continuous-energy neutron beam of the WNR facility at Los Alamos. Gamma-ray production measurements using high resolution Ge detectors have been employed for gamma-rays in the energy range, 0.1 < E{sub {gamma}} < 10 MeV. These measurements allow identification of reactions from the known energies of the gamma-ray… more
Date: December 31, 1994
Creator: Nelson, R. O.; Wender, S. A. & Mayo, D. R.
Partner: UNT Libraries Government Documents Department
open access

Proceedings of the workshop on future hadron facilities in the US

Description: This report discusses the following topics on future hadron facilities: Workshop on future hadron facilities in the US; 30 {times} 30 TeV-summary report; A high luminosity, 2 {times} 2 TeV collider in the tevatron tunnel; magnets working group; cryogenics discussion; vacuum report; antiproton source production; injector working group; interaction region working group; lattice/beam dynamics working group; LEBT for high-luminosity colliders; some notes on long-range beam-beam effects for the 2TeV… more
Date: December 31, 1994
Partner: UNT Libraries Government Documents Department
open access

Optical properties of fractal nanocomposites

Description: Optical prossesses in nanostructured fractal composites are shown to be strongly enhanced. The enhancement occurs because of a localization of dipolar eigenmodes in subwavelength areas.
Date: December 31, 1994
Creator: Markel, V. A.; Kim, W.; Armstrong, R.; Shalaev, V. & Stechel, E. B.
Partner: UNT Libraries Government Documents Department
open access

Accelerator modeling system for the future

Description: Many computer programs and a variety of models exist for the design of accelerator lattices and the correction of errors. Many physicists contributed to this work by developing codes to suit a variety of machines. At present, we are integrating some of these codes into a unified framework to design and control any type of machine. We will refer to this system of interactive accelerator design, control, and analysis codes as the All-In-One Modeling system (AIM). This paper will explore the utili… more
Date: December 1, 1994
Creator: Lee, M.; Cai, Y. & Tran, P.
Partner: UNT Libraries Government Documents Department
open access

Taylor series expansion and modified extended Prony analysis for localization

Description: In the multiple source localization problem, many inverse routines use a rooting of a polynomial to determine the source locations. The authors present a rooting algorithm for locating an unknown number of three-dimensional, near-field, static sources from measurements at an arbitrarily spaced three-dimensional array. Since the sources are near-field and static, the spatial covariance matrix is always rank one, and spatial smoothing approaches are inappropriate due to the spatial diversity. The… more
Date: December 1, 1994
Creator: Mosher, J. C. & Lewis, P. S.
Partner: UNT Libraries Government Documents Department
open access

Buried Waste Integrated Demonstration lessons learned: 1993 technology demonstrations

Description: An integrated technology demonstration was conducted by the Buried Waste Integrated Demonstration (BWID) at the Idaho National Engineering Laboratory Cold Test Pit in the summer of 1993. This program and demonstration was sponsored by the US Department of Energy Office of Technology Development. The demonstration included six technologies representing a synergistic system for the characterization and retrieval of a buried hazardous waste site. The integrated technology demonstration proved very… more
Date: December 31, 1994
Creator: Kostelnik, K. M. & Owens, K. J.
Partner: UNT Libraries Government Documents Department
open access

Magnetic and structural properties of Fe/Pd multilayers studied by magnetic x-ray dichroism and x-ray absorption spectroscopy

Description: The results of magnetic circular x-ray dichroism (MCXD) measurements and extended x-ray absorption fine structure measurements (EXAFS) of the Fe K-edges of textured Fe(110)/Pd(111) multilayers are reported. The EXAFS results indicates that the iron in the system goes from bcc to a more densely packed system as the thickness of the iron layer is decreased. The magnetic properties were measured by SQUID magnetometry from 5-350 K. For all the samples, the saturation magnetization was significantly… more
Date: December 1, 1994
Creator: Mini, S. M.; Fullerton, E. E.; Sowers, C. H.; Fontaine, A.; Pizzini, S.; Bommannavar, A. S. et al.
Partner: UNT Libraries Government Documents Department
open access

Status of nuclear data for ITER applications

Description: As the development of a near-term fusion reactor, such as the International Thermonuclear Experimental Reactor (ITER), enters the engineering design activity phase, one of the essential elements leading to the successful design, construction and operation of such a reactor is nuclear data. High quality nuclear data for all reactor materials relevant to ITER will be required in order to assess the nuclear performance, radiation damage, and safety and environmental aspects of all reactor componen… more
Date: December 31, 1994
Creator: Larson, D. C.; Cheng, E. T.; Mann, F. M. & Saji, G.
Partner: UNT Libraries Government Documents Department
open access

Long-Baseline Neutrino Oscillation Experiments

Description: There is no unambiguous definition for long baseline neutrino oscillation experiments. The term is generally used for accelerator neutrino oscillation experiments which are sensitive to {Delta}m{sup 2} < 1.0 eV{sup 2}, and for which the detector is not on the accelerator site. The Snowmass N2L working group met to discuss the issues facing such experiments. The Fermilab Program Advisory Committee adopted several recommendations concerning the Fermilab neutrino program at their Aspen meeting imm… more
Date: December 31, 1994
Creator: Crane, Dan & Goodman, Maury
Partner: UNT Libraries Government Documents Department
open access

The hard truth

Description: In the Bayesian methodology, the posterior probability combines uncertainty about prior knowledge, and available data about alternative models of reality. The posterior quantifies the degree of certainty one has in inferring the truth in terms of those models. We propose a method to determine the reliability of a specific feature of a Bayesian solution. Our approach is based on an analogy between the negative logarithm of the posterior and a physical potential. This analogy leads to the interpr… more
Date: December 31, 1994
Creator: Hanson, K. M. & Cunningham, C. S.
Partner: UNT Libraries Government Documents Department
open access

High surface area, high permeability carbon monoliths

Description: The goal of this work is to prepare carbon monoliths having precisely tailored pore size distribution. Prior studies have demonstrated that poly(acrylonitrile) can be processed into a precursor having tailored macropore structure. Since the macropores were preserved during pyrolysis, this synthetic process provided a route to porous carbon having macropores with size =0.1 to 10{mu}m. No micropores of size <2 nm could be detected in the carbon, however, by nitrogen adsorption. In the present wor… more
Date: December 31, 1994
Creator: Lagasse, R. R. & Schroeder, J. L.
Partner: UNT Libraries Government Documents Department
open access

Tau as a probe for new physics

Description: The usage of polarimetry and spin-correlation tests to determine the complete Lorenz structure of the tau lepton`s charged and neutral- current couplings is reviewed. The emphasis is on tests for ``something`` in a (V-A)+ ``something`` structure in J{sup charged} Lepton current, so as to bound the scales {lambda} for ``new physics`` such as arising from tau weak magnetism, weak electricity, and/or second-class currents. Tests for T and for CP violation are discussed.
Date: December 31, 1994
Creator: Nelson, C. A.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen