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322 Matching Results
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''Follow that quarkexclamation'' (and other exclusive stories)
Quarks are considered to be the basic constituents of matter. In a series of recent experiments, Carroll studied exclusive reactions as a means of determining the interactions between quarks. Quantum Chromo-dynamics (QCD) is the modern theory of the interaction of quarks. This theory explains how quarks are held together via the strong interaction in particles known as hadrons. Hadrons consisting of three quarks are called baryons. Hadrons made up of a quark and an antiquark are called mesons. In his lecture, Carroll describes what happens when two hadrons collide and scatter to large angles. The violence of the collision causes the gluons that bind the quarks in a particular hadron to temporarily lose their grip on particular quarks. Quarks scramble toward renewed unity with other quarks, and they undergo rearrangement, which generally results in additional new particles. A two-body exclusive reaction has occurred when the same number of particles exist before and after the collisions. At large angles these exclusive reactions are very rare. The labels on the quarks known as flavor enable the experimenter to follow the history of individual quarks in detail during these exclusive reactions. Carroll describes the equipment used in the experiment to measure short distance, …
Date:
June 17, 1987
Creator:
Carroll, A. S.
Object Type:
Report
System:
The UNT Digital Library
[Letter from James R. Miller to Richard Swain, February 17, 1987]
Letter from James R. Miller to Richard Swain, on February 17, 1987, sending him an executive summary and proposal for the Texas Academy of Mathematics and Science. An executive summary is included.
Date:
February 17, 1987
Creator:
Miller, James R.
Object Type:
Letter
System:
The UNT Digital Library
[Memo from Frank Kemerer, June 17, 1987]
Memo from Frank Kemerer to Julia Dunn, Barbara Jungjohan, Peter Lane, Betsy McGuire, Bruce Meeks, and Byron Medler, on June 17, 1987, extending an invitation from Dr. Jean Schaake to meet with the director of the Louisiana School for Math, Science and the Arts.
Date:
June 17, 1987
Creator:
Kemerer, Frank R.
Object Type:
Letter
System:
The UNT Digital Library
[Memorandum from Jean Schaake, July 17, 1987]
Memorandum from Jean Schaake to Alan Moore, John Ed Allen, Gerry O'Donovan, Rogers Redding, Walter Sandefur, Bob Stevens, Le Theriot, Blake Dehart, and Ron Arrington, advising them to leave September 15, 1987 open on their calendars, as they are expecting a visit from Julian C. Stanley.
Date:
July 17, 1987
Creator:
Schaake, Jean
Object Type:
Letter
System:
The UNT Digital Library
[Letter from James R. Miller to Alfred Hurley, February 18, 1987]
Letter from James R. Miller to Alfred Hurley, on February 18, 1987, confirming that he has sent a copy of the Academy proposal to Commission Ken Ashworth. He suggests that certain people be sent a copy of the proposal, and recommends that a news conference be held to announce the idea.
Date:
February 17, 1987
Creator:
Miller, James R.
Object Type:
Letter
System:
The UNT Digital Library
Application of microwave energy for in-drum solidification of simulated precipitation sludge
The application of microwave energy for in-container solidification of simulated transuranic contaminated precipitation sludges has been tested. Results indicate volume reductions to 83% are achievable by the continuous feeding of pre-dried sludge into a waste container while applying microwave energy. An economic evaluation was completed showing achievable volume and weight reductions to 87% compared with a current immobilization process for wet sludge. 7 refs., 15 figs., 16 tabs.
Date:
August 17, 1987
Creator:
Petersen, R. D.; Johnson, A. J.; Swanson, S. D. & Thomas, R. L. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Monopole strength as a probe of nuclear shape mixing
The monopole strength, MS, within a single set of nuclear shape excitations is compared with the MS between different shapes. After misconceptions are pointed out concerning the spin dependence of B(E2) values, MS properties are juxtaposed with gamma-ray and beta-decay properties of /sup 70/Se, /sup 96/Zr, /sup 102/Pd, and the N = 60 isotones to illustrate the utility of combined investigations and evidence is given for the observation of a two-phonon octupole multiplet. Finally, consideration is given to the dominance of the /sup 3/S/sub 1/ force in producing deformation in the N > 50 1g nuclei. 23 refs., 4 figs.
Date:
August 17, 1987
Creator:
Meyer, R.A.
Object Type:
Article
System:
The UNT Digital Library
Technical data summary: Plan for closure of the 643-G burial ground
This report involves the actions of closing the 643-G burial ground which involves waste removal, stabilization, and capping. Remedial action involves the removing of the transuranic waste and closing of the grid wells. The closure cap for the burial site will consist of native soil, clay, and gravel. This will assure long-term physical and chemical stability. (MB)
Date:
August 17, 1987
Creator:
Cook, J. R.
Object Type:
Report
System:
The UNT Digital Library
The Canadian Record (Canadian, Tex.), Vol. 97, No. 38, Ed. 1 Thursday, September 17, 1987
Weekly newspaper from Canadian, Texas that includes local, state and national news along with extensive advertising.
Date:
September 17, 1987
Creator:
Ezzell, Ben & Ezzell, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 79, No. 51, Ed. 1 Thursday, December 17, 1987
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
December 17, 1987
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 79, No. 38, Ed. 1 Thursday, September 17, 1987
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
September 17, 1987
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
The Canadian Record (Canadian, Tex.), Vol. 97, No. 51, Ed. 1 Thursday, December 17, 1987
Weekly newspaper from Canadian, Texas that includes local, state and national news along with extensive advertising.
Date:
December 17, 1987
Creator:
Ezzell, Ben & Ezzell, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
The Bogata News (Bogata, Tex.), Vol. 77, No. 10, Ed. 1 Thursday, December 17, 1987
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
December 17, 1987
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
The Bogata News (Bogata, Tex.), Vol. 76, No. 51, Ed. 1 Thursday, September 17, 1987
Weekly newspaper from Bogata, Texas that includes local, state, and national news along with advertising.
Date:
September 17, 1987
Creator:
Nichols, Nanalee & Nichols, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Magnet technology for the Engineering Test Reactor
The consideration for building an international Engineering Test Reactor emerged from the November 1985 Geneva Summit, in which President Reagan and Secretary Gorbachev called for the ''widest practical development of international cooperation'' in fusion. In parallel with the OTR design in the USSR, the FER in Japan, and the NET in Europe, the US has pursued the TIBER (Tokamak Ignition/Burn Experimental Reactor). This compact design of 3-m major radius is achievable because of high-current-density, radiation-tolerant magnets with nuclear heating rates up to 10 mW . cm/sup -3/. Full development of cable-in-conduit conductors (CICC) is seen as a credible path to achieve 40 A . mm/sup -2/ at fields of 12 T in the toroidal field (TF) coils and 14 T in the central poloidal field (PF) coils. Since neutron fluences of up to 10/sup 19/ n . cm/sup -2/ are expected in the TF coils, the unalloyed niobium-tin would be superior at 12 T. However, the central PF coil at 14 T is better shielded, so modified niobium tin would be advantageous. Polyimide insulation in the TF coils would withstand the equivalent 10/sup 10/) rads if loads in the winding pack are taken in compression. 13 refs., 7 figs., 2 …
Date:
September 17, 1987
Creator:
Henning, C. D. & Miller, J. R.
Object Type:
Article
System:
The UNT Digital Library
The LLNL HFTF (High-Field Test Facility): A flexible superconducting test facility for fusion magnet development
The High-Field Test Facility (HFTF) is a flexible and, in many ways, unique facility at Lawrence Livermore National Laboratory (LLNL) for providing the test capabilities needed to develop the superconducting magnet systems of the next generation fusion machines. The superconducting coil set in HFTF has been operated successfully at LLNL, but in its original configuration, its utility as a test facility was somewhat restricted and cryogenic losses were intolerable. A new cryostat for the coil set allows the magnet system to remain cold indefinitely so the system is available on short notice to provide high fields (about 11 T) inside a reasonably large test volume (0.3-m diam). The test volume is physically and thermally isolated from the coil volume, allowing test articles to be inserted and removed without disturbing the coil cryogenic volume, which is maintained by an on-line refrigerator. Indeed, with the proper precautions, it is even unnecessary to drop the field in the HFTF during such an operation. The separate test volume also allows reduced temperature operation without the expense and complication of subcooling the entire coil set (about 20-t cold mass). The HFTF has thus become a key facility in the LLNL magnet development program, where the …
Date:
September 17, 1987
Creator:
Miller, J. R.; Chaplin, M. R.; Leber, R. L. & Rosdahl, A. R.
Object Type:
Article
System:
The UNT Digital Library
Incorporation of toroidal boundary conditions into program POISSON
A technique is developed for introduction of a boundary condition applicable to relaxation computations for magnetic problems with axial symmetry and with no sources (currents, or magnetized material) external to the boundary. The procedure as described in this note is restricted to cases in which the (toroidal) boundary will surround completely the region of physical interest but will not encompass the axis of rotational symmetry. The technique accordingly provides the opportunity of economically excluding from the relaxation process regions of no direct concern in the immediate neighborhood of the symmetry axis and hence can have useful application to annular magnetic devices with axial symmetry. The procedure adopted makes use internally of the characteristic form of the vector-potential function, in a source-free region, when expressed in toroidal coordinates. The relevant properties of associated Legendre functions of half-integral degree are summarized in this connection and their introduction into the program POISSON is outlined. Results of some test cases are included, to illustrate the application of this technique for configurations with median-plane symmetry. 8 refs., 9 figs.
Date:
July 17, 1987
Creator:
Laslett, L.J.; Caspi, S. & Helm, M.
Object Type:
Report
System:
The UNT Digital Library
Suppression of the uranium-hydrogen reaction using high-dose carbon implantation
We have previously reported the delay and reduction of the hydriding of uranium by implantation of oxygen. The reduced hydriding was attributed to the presence of the uranium oxide layer created near room temperature. In this paper we present results for the layers formed by implantation of 80 keV C/sup +/ to a dose of 8E17 C/cm/sup 2/. The carbide layers formed were characterized by Auger electron spectroscopy, Rutherford backscattering, and glancing angle x-ray diffraction. Hydriding properties of both non-implanted and implanted uranium were measured for 76 Torr hydrogen at 130/sup 0/C. The implanted specimens had significantly longer incubation times for the start of the reaction after exposure to hydrogen and less area participating in the reaction.
Date:
April 17, 1987
Creator:
Musket, R.G.
Object Type:
Article
System:
The UNT Digital Library
The Cherokeean. (Rusk, Tex.), Vol. 139, No. 32, Ed. 1 Thursday, September 17, 1987
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
September 17, 1987
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Cherokeean. (Rusk, Tex.), Vol. 139, No. 45, Ed. 1 Thursday, December 17, 1987
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
December 17, 1987
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 12, Number 86, Pages 4287-4304, November 17, 1987
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 17, 1987
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 12, Number 54, Pages 2317-2353, July 17, 1987
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:
July 17, 1987
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 12, Number 12, Pages 522-552, February 17, 1987
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:
February 17, 1987
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Texas Register, Volume 12, Number 20, Pages 871-921, March 17, 1987
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:
March 17, 1987
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History