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1,034 Matching Results
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Probing the possibility of a /sup 12/C/sup 13/C abundance gradient from observations of interstellar CH/sup +/
I have performed high signal-to-noise (SN /equals/ 300 to 500) observations of interstellar CH/sup /plus// at Lick Observatory and at CTIO of the reddened, early-type stars HD 183143, HD 24432, and HD 157038 in an effort to probe the existence of a /sup 12/C/sup 13/C abundance gradient in our Galaxy.
Date:
September 16, 1987
Creator:
Hawkins, I.
Object Type:
Article
System:
The UNT Digital Library
Injection septum magnets for the Loma Linda medical accelerator
The injection beamline runs over the last magnet before a long straight section and is then displaced downward 55.88 cm to the accelerator beamline. The displacement is magnetic and the final deflection onto the synchrotron orbit is by an electric kicker. The first component, the reverse septum magnet, bends the injection beam 25)degree) downward. This is followed by the injection septum (20)degree) bend upward) and the final injection kicker (5)degree) bend upward). The septum magnets produce a peak field of 3.4 K gauss at a current of 28,000 amperes within a 0.1 msec long pulse. The electric kicker produces a field of 7.3 KV/cm with a pulse length of 0.0011 msec. The septum magnets are similar to each other in construction with a bending radium of 72.7 cm. The curvature is required to increase the effective aperture. Each magnet has a single-turn copper coil bonded to a stainless steel plate for reinforcement. This eliminates insulating material, which could be subject to radiation damage, at the septum. The stainless steel plate is welded to the magnet laminations. The current is confined to the septum by the insulation between the laminations, which are a standard core material. The total septum thickness with …
Date:
September 22, 1987
Creator:
Satti, J.A.
Object Type:
Article
System:
The UNT Digital Library
TIBER II/ETR final design report: Volume 1, 1. 0 Introduction; 2. 0 plasma engineering
This paper discusses the design of the TIBER II tokamak test reactor. Specific topics discussed are the physics objectives for Tiber, magnetics, baseline operating point, pulsed inductive operation, edge physics and impurity control, fueling, disruption control, vertical stability and impurity flow reversal. (LSP)
Date:
September 1, 1987
Creator:
Lee, J.D. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Experimental review of J/psi decays
This is a review of J/psi physics from e/sup +/e/sup -/ colliders presented at the Charm Workshop in Beijing, China. The review includes a brief historical summary of J/psi physics, a general discussion of theoretical models and detailed results on radiative and hadronic J/psi decays from the Mark III, DM2, Crystal Ball and MARK II groups. 119 refs., 13 figs., 10 tabs.
Date:
September 1, 1987
Creator:
Toki, W.H.
Object Type:
Article
System:
The UNT Digital Library
Economic Decision Making Model for Geothermal Sludge Disposal alternatives (EDM-GSD): Version 1. 0
The Economic Decision Making Model for Geothermal Sludge Disposal Alternatives-Version 1.0'' (EDM-GSD 1.0) is a microcomputer-based dynamic model developed to assist in determining the benefits and costs of various geothermal solid waste treatment procedures. It is intended for use by geothermal managers in dealing with geothermal waste and treatment process issues as a means to assist in overcoming the technical and economic barriers to expanded geothermal energy utilization. The model is based on a 50MW flash plant. However, it is designed to provide the user with sufficient flexibility when inputing data to analyze all types of geothermal plants. Default values for economic and technical parameters can be overridden by the user through the input of specific data. In addition, data can be changed for any year of an analysis to account for desired changes in input parameters such as costs and distance to disposal sites. The results of the model will allow the user to: Determine current geothermal plant disposal costs; Evaluate the cost-effectiveness of alternative treatment techniques; and Evaluate the economic effects of changes in disposal regulations.
Date:
September 1, 1987
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Letter from James J. Muro to Val Wilkie, Jr., September 10, 1987]
Letter from James J. Muro to Val Wilkie of the Sid W. Richardson Foundation, on September 10, 1987, requesting a grant of $100,000 to be used to open the Texas Academy of Mathematics and Science. A short summary of the concept of the Academy is included.
Date:
September 10, 1987
Creator:
Muro, James J.
Object Type:
Letter
System:
The UNT Digital Library
[Draft of a Letter from Alfred F. Hurley to E. Bruce Street, September 21, 1987]
Draft of a letter from Alfred F. Hurley to E. Bruce Street, on September 21, 1987, thanking him for a check from the Bertha Foundation in support of the Texas Academy of Math and Science.
Date:
September 21, 1987
Creator:
Hurley, Alfred F.
Object Type:
Letter
System:
The UNT Digital Library
[Memo from Rogers W. Redding to James R. Miller, September 14, 1987]
Memo from Rogers W. Redding to James R. Miller, on September 14, 1987, sending a curriculum vitae of Dr. Julian C. Stanley.
Date:
September 14, 1987
Creator:
Redding, Rogers W.
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Rogers Redding to Jean Schaake and Barbara Jungjohan, September 4, 1987]
Letter from Rogers Redding to Jean Schaake and Barbara Jungjohan, on September 4, 1987, confirming the visit of Julian C. Stanley and his meeting with the Student Affairs Committee. A copy of Dr. Stanley's itinerary is included.
Date:
September 4, 1987
Creator:
Redding, Rogers W.
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Barbara Jungjohan to the Student Life Committee, September 16, 1987]
Letter from Barbara Jungjohan to the members of the Student Life Committee, on September 16, 1987, thanking them for spending time with Dr. Julian C. Stanley. She encloses some materials Stanley thought might be helpful, and clears up a mistaken impression she gave at the last meeting.
Date:
September 16, 1987
Creator:
Jungjohan, Barbara
Object Type:
Letter
System:
The UNT Digital Library
Minutes, Texas Academy of Math and Science Student Affairs Committee, September 4, 1987
Minutes from the September 4, 1987 meeting of the Texas Academy of Math and Science Student Affairs Committee, including members present and absent, detailed notes on the meeting, the date and place of the next meeting, and a list of enclosures (not included).
Date:
September 4, 1987
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Memorandum from Jean Schaake, September 24, 1987]
Memorandum from Jean Schaake to Alan Moore, John Ed Allen, Gerry O'Donovan, Walter Sandefur, Bob Stevens, Bill Deering, Le Theriot, Blake Dehart, Ron Arrington, Patti Gilbert, and Peggy Guthrie, on September 24, 1987, regarding their next meeting. Schaake asks that they come to the meeting with ideas on nomination and selection criteria, math level testing, computer science, enrichment activities, and a speaker program. A paper concerning the nomination and selection of students is included.
Date:
September 24, 1987
Creator:
Schaake, Jean
Object Type:
Letter
System:
The UNT Digital Library
[Letter from Julian C. Stanley to Rogers W. Redding, September 16, 1987]
Letter from Julian C. Stanley to Rogers W. Redding, on September 16, 1987, thanking him for the chance to speak to the TAMS Student Affairs Committee, and offering to consult on other matters that come up.
Date:
September 16, 1987
Creator:
Stanley, Julian C.
Object Type:
Letter
System:
The UNT Digital Library
An Approach to Implementing State Space Searches on Heterogeneous Systems of Multiprocessors
We report on experiments run on a set of shared-memory multiprocessors. Our goal was to demonstrate that one could conveniently utilize a set of shared-memory multiprocessors cooperatively working on typical state-space searches. We utilized a technology for writing portable code for multiprocessors, coded three depth-first state-space searches, and ran them on a set of multiprocessors. The final problem used substantial resources (over 65 hours on a single processor) and was successfully distributed over four distinct shared memory multiprocessors (2 Sequents and 2 Encores), reducing the time to perform the computation to slightly over 2 hours.
Date:
September 1987
Creator:
Glickfeld, Barney & Overbeek, Ross A.
Object Type:
Report
System:
The UNT Digital Library
One-Dimensional Leakage-Flow Vibration Instabilities
Simple boundary conditions, pressure losses, and channel geometries necessary for the unstable, rigid-body translational vibrations of the wall of one-dimensional leakage-flow channel are identified. General expressions for the flow damping and stiffness forces acting on the vibrating channel wall are derived and specific results are given for channels with wall friction, point pressure losses, sharp-edged constrictions, and diverging or converging widths. The minimum conditions necessary for dynamic and static (divergence) instability were found to be an upstream point pressure loss and a diverging channel width with a finite-length throat region, respectively.
Date:
September 1987
Creator:
Mulcahy, T. M.
Object Type:
Report
System:
The UNT Digital Library
Assessment of Impact of Advanced Energy Transmission Fluids on District Heating and Cooling Systems : (Phase 1)
Argonne National Laboratory (ANL), under sponsorship of the US Department of Energy (DOE) Office of Buildings and Community Systems, has embarked upon a comprehensive, long-range program to develop high-performance advanced energy transmission fluids for use in district heating and cooling (DHC) systems. ANL has the lead technical role in this DOE program. These advanced fluids will substantially reduce flow frictional losses and enhance energy transfer. In system enhancement scoping studies conducted by ANL, the fluids yielded potentially significant upfront capital equipment cost reductions by allowing the use of smaller pipes, pumps, heat exchangers, and storage tanks as well as reductions in operational costs. This report presents the first-phase results of assessment of impact of the advanced fluids on DHC systems. Future reports will focus on assessment of impact on hardware performance, capital equipment, and operation costs.
Date:
September 1987
Creator:
Kasza, Kenneth Edmund & Chen, M. M.
Object Type:
Report
System:
The UNT Digital Library
Residual radioactivity measurements along the PB target pile
In this brief note, measurements of residual radioactivity made along the PB target pile will be described. This was done as a test of the methods described by P. Gollon (Go76) for predicting such radioactivity based upon surface star density calculations using CASIM. These methods have been extensively used at Fermilab, especially in the design of the Tevatron II target piles. 4 refs., 2 figs.
Date:
September 1, 1987
Creator:
Cossairt, J.D.
Object Type:
Article
System:
The UNT Digital Library
Fabrication of isotopic heat and radiation sources for the Federal Republic of Germany
Pacific Northwest Laboratory (PNL) has filled 30 German-made canisters with highly radioactive borosilicate glass. These canisters, containing specified amounts of /sup 137/Cs and /sup 90/Sr, will be sealed using a gas tungsten arc welder and will be decontaminated to nonsmearable limits using an electropolishing system. They are to be characterized in a series of nondestructive tests: surface dose rate measurement, axial gamma scanning, canister mass determination, and canister surface temperature measurement. The canisters will then be transported to the Asse Salt Mine located in the Federal Republic of Germany (FRG) for a 5-year repository testing program. 3 refs., 2 figs., 1 tab.
Date:
September 1, 1987
Creator:
McElroy, J. L.; Holton, L. K., Jr.; Burkholder, H. C.; Bryan, G. H. & Minor, J. E.
Object Type:
Article
System:
The UNT Digital Library
Assessment of impact of advanced energy transmission fluids on district heating and cooling systems (Phase 1)
Argonne National Laboratory (ANL), under sponsorship of the US Department of Energy (DOE) Office of Buildings and Community Systems, has embarked upon a comprehensive, long-range program to develop high-performance advanced energy transmission fluids for use in district heating and cooling (DHC) systems. ANL has the lead technical role in this DOE program. These advanced fluids will substantially reduce flow frictional losses and enhance energy transfer. In system enhancement scoping studies conducted by ANL, the fluids yielded potentially significant upfront capital equipment cost reductions by allowing the use of smaller pipes, pumps, heat exchangers, and storage tanks as well as reductions in operational costs. This report presents the first-phase results of assessment of impact of the advanced fluids on DHC systems. Future reports will focus on assessment of impact on hardware performance, capital eqiupment, and operation costs. 9 refs., 30 figs., 2 tab.
Date:
September 1, 1987
Creator:
Kasza, K. E. & Chen, M. M.
Object Type:
Report
System:
The UNT Digital Library
Transfer of oil shale research data into the Morgantown Energy Technology Center data base
The US Department of Energy (DOE), Morgantown Energy Technology Center constructed a fossil energy research data base to make data readily available to the public, to avoid duplication of research, to guide future research, and to reduce costs of future research. Western Research Institute (WRI) was awarded a contract to put data from work done prior to 1983 into the data base. Most of the data that WRI transferred to DOE on magnetic tape was oil shale data because the underground coal gasification (UCG) data base was not ready to receive data until late in the contract period. The high cost of processing data in the manner specified prevented all of the highly ranked data from being transferred with available funding. One hundred and ten sets of data were transferred to DOE on magnetic tape: ninety-three sets of oil shale data and two sets of UCG data to the test data data base, and fifteen sets of oil shale data including assay, mineralogy, and lithology data from 12,907 samples using 7,972,404 computer words to the resource extraction data base. Two thousand and seventy sets of data were microfiched and transferred to DOE; these included 1111 sets of oil shale data, …
Date:
September 1, 1987
Creator:
Merriam, N. W.
Object Type:
Report
System:
The UNT Digital Library
The use of toroidal boundary conditions in the program POISSON
In circular particle accelerators of moderate size, one cannot entirely neglect the curvature of the structure and of the guide field. In practice, one may wish to restrict the region of analysis to that near the working aperture, while excluding a very substantial area closer to (and including) the axis of rotational symmetry. In this way, a more efficient mesh can be generated for a program such as POISSON. In restricting the solution to the region of interest, there must be concern regarding a suitable termination of the problem at the boundary of the mesh. For these reasons, we have employed toroidal coordinates in constructing the boundary to a relaxation mesh, and in formulating the boundary conditions that then would be imposed at such boundaries. 11 refs., 6 figs.
Date:
September 1, 1987
Creator:
Caspi, S.; Helm, M. & Laslett, L.J.
Object Type:
Article
System:
The UNT Digital Library
The purposes, achievements, and priorities of arms control
Arms control purposes include strengthening the framework of deterrence and reducing the threat of the use of nuclear weapons, reducing the dangers of attack and accidental nuclear war, and allowing more resources for the civilian economy. The paper briefly describes achievements in arms control since World War II. These include the Limited Test Ban Treaty (LTBT), Nonproliferation Treaty (NPT), Anti-Ballistic Missile Treaty (ABMT)-SALT I, SALT II, Threshold Test Ban Treaty (TTBT), Peaceful Nuclear Explosions Treaty (PNET), and Nuclear-Free Zones treaties. The author also discusses his views on what the priorities of arms control activities should be. (ACR)
Date:
September 1, 1987
Creator:
Brown, P.S.
Object Type:
Article
System:
The UNT Digital Library
Results from shallow research drilling at Inyo Domes, Long Valley Caldera, California and Salton Sea geothermal field, Salton Trough, California
This report reviews the results from two shallow drilling programs recently completed as part of the United States Department of Energy Continental Scientific Drilling Program. The purpose is to provide a broad overview of the objectives and results of the projects, and to analyze these results in the context of the promise and potential of research drilling in crustal thermal regimes. The Inyo Domes drilling project has involved drilling 4 shallow research holes into the 600-year-old Inyo Domes chain, the youngest rhyolitic event in the coterminous United States and the youngest volcanic event in Long Valley Caldera, California. The purpose of the drilling at Inyo was to understand the thermal, chemical and mechanical behavior of silicic magma as it intrudes the upper crust. This behavior, which involves the response of magma to decompression and cooling, is closely related to both eruptive phenomena and the establishment of hydrothermal circulation. The Salton Sea shallow research drilling project involved drilling 19 shallow research holes into the Salton Sea geothermal field, California. The purpose of this drilling was to bound the thermal anomaly, constrain hydrothermal flow pathways, and assess the thermal budget of the field. Constraints on the thermal budget links the local hydrothermal …
Date:
September 1, 1987
Creator:
Younker, L.W.; Eichelberger, J.C.; Kasameyer, P.W.; Newmark, R.L. & Vogel, T.A.
Object Type:
Article
System:
The UNT Digital Library
Numerical simulations of multiphoton processes in many electron atoms
In this report, we will present some details of two numerical methods which we have been pursuing for treating the multi-electron case. Both involve a numerical representation of the time dependent Hartree Fock electronic orbitals and a direct time integration of the coupled equations. Using these methods we will be able to determine the dynamics of the energy absorption process (preionization dynamics and the mechanism of ionization, i.e. whether it is direct multi-electron emission or sequential). 6 refs.
Date:
September 1, 1987
Creator:
Kulander, K.C. & Cerjan, C.
Object Type:
Article
System:
The UNT Digital Library