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Abundance, Behavior, and Habitat Utilization by Coho Salmon and Steelhead Trout in Fish Creek, Oregon, as Influenced by Habitat Enhancement: Annual Report 1985.
Construction and evaluation of salmonid habitat improvements on Fish Creek, a tributary of the upper Clackamas River, is designed to increase the annual number of chinook and coho salmon, and steelhead trout smolt outmigrants. The primary objectives of the evaluation include the: (1) evaluation and quantification of changes in salmonid spawning and rearing habitat resulting from a variety of habitat improvements; (2) evaluation and quantification of changes in fish populations and biomass resulting from habitat improvements; and (3) evaluation of the cost-effectiveness of habitat improvements developed with BPA and Forest Service funds on Fish Creek. This report focuses on the projects completed in the basin in 1983, 1984, and 1985, and their evaluation.
Date:
September 1, 1986
Creator:
Everest, Fred H.
Object Type:
Report
System:
The UNT Digital Library
Accelerated beam experiments with the ORNL SITEX (Surface Ionization with Transverse Extraction) and VITEX (Volume Ionization with Transverse Extraction) H/sup -//D/sup -/ sources
Beam parameters have been measured for both the Surface Ionization with Transverse Extraction (SITEX) and Volume Ionization with Transverse Extraction (VITEX) H/sup -//D/sup -/ ion sources. Both sources use a reflex discharge to generate the main plasma. Beam energies up to 18 keV were used for pulse lengths up to several seconds. For SITEX, Faraday cup magnetically analyzed D/sup -/ beam currents of 110 mA at extraction densities of 48 mA/cm/sup 2/ and at a source ion temperature of 4 eV have been measured. For the VITEX results, Faraday cup magnetically analyzed beam currents of up to 80 mA at extraction densities of 27 mA/cm/sup 2/ and at a source ion temperature of 0.5 eV have been measured. Virtually all extracted electrons were recovered at an energy of 10 to 30% of the accel beam energy, and there were none in the analyzed beam.
Date:
January 1, 1986
Creator:
Dagenhart, W. K.; Tsai, C. C.; Stirling, W. L.; Ryan, P. M.; Schechter, D. E.; Whealton, J. H. et al.
Object Type:
Article
System:
The UNT Digital Library
Accelerated Leach Test(s) Program: Annual report
A computerized data base of LLW leaching data has been developed. Long-term tests on portland cement, bitumen and vinyl ester-styrene (VES) polymer waste forms containing simulated wastes are underway which are designed to identify and evaluate factors that accelerate leaching without changing the mechanisms.
Date:
September 1, 1986
Creator:
Dougherty, D.R.; Pietrzak, R.F.; Fuhrmann, M. & Colombo, P.
Object Type:
Report
System:
The UNT Digital Library
Accelerated plan to develop magnetic fusion energy
We have shown that, despite funding delays since the passage of the Magnetic Fusion Engineering Act of 1980, fusion development could still be carried to the point of a demonstration plant by the year 2000 as called for in the Act if funding, now about $365 million per year, were increased to the $1 billion range over the next few years (see Table I). We have also suggested that there may be an economic incentive for the private sector to become in accelerating fusion development on account of the greater stability of energy production costs from fusion. Namely, whereas fossil fuel prices will surely escalate in the course of time, fusion fuel will always be abundantly available at low cost; and fusion technology poses less future risk to the public and the investor compared to conventional nuclear power. In short, once a fusion plant is built, the cost of generating electricity mainly the amortization of the plant capital cost - would be relatively fixed for the life of the plant. In Sec. V, we found that the projected capital cost of fusion plants ($2000 to $4000 per KW/sub e/) would probably be acceptable if fusion plants were available today.
Date:
May 28, 1986
Creator:
Fowler, T.K.
Object Type:
Report
System:
The UNT Digital Library
Accelerating the Loop Expansion
This thesis introduces a new non-perturbative technique into quantum field theory. To illustrate the method, I analyze the much-studied phi/sup 4/ theory in two dimensions. As a prelude, I first show that the Hartree approximation is easy to obtain from the calculation of the one-loop effective potential by a simple modification of the propagator that does not affect the perturbative renormalization procedure. A further modification then susggests itself, which has the same nice property, and which automatically yields a convex effective potential. I then show that both of these modifications extend naturally to higher orders in the derivative expansion of the effective action and to higher orders in the loop-expansion. The net effect is to re-sum the perturbation series for the effective action as a systematic ''accelerated'' non-perturbative expansion. Each term in the accelerated expansion corresponds to an infinite number of terms in the original series. Each term can be computed explicitly, albeit numerically. Many numerical graphs of the various approximations to the first two terms in the derivative expansion are given. I discuss the reliability of the results and the problem of spontaneous symmetry-breaking, as well as some potential applications to more interesting field theories. 40 refs.
Date:
July 29, 1986
Creator:
Ingermanson, R.
Object Type:
Report
System:
The UNT Digital Library
Acceleration of electrons by the wake field of proton bunches
This paper discusses a novel idea to accelerate low-intensity bunches of electrons (or positrons) by the wake field of intense proton bunches travelling along the axis of a cylindrical rf structure. Accelerating gradients in excess of 100 MeV/m and large ''transformer ratios'', which allow for acceleration of electrons to energies in the TeV range, are calculated. A possible application of the method is an electron-positron linear collider with luminosity of 10/sup 33/ cm/sup -2/ s/sup -1/. The relatively low cost and power consumption of the method is emphasized.
Date:
January 1, 1986
Creator:
Ruggiero, Alessandro G.
Object Type:
Article
System:
The UNT Digital Library
Acceleration of Polarized Proton in RHIC
In this report is examined the possibility of polarized proton in RHIC collider. The issues needed for the future study is also discussed. With the improved source and AGS booster, its is expected that the luminosity for polarized beam could be 0.4*10^32/cm^2/sec at energy of 250 Gev in RHIC. There we need 4 snakes and 4 spin rotators in the collider.
Date:
November 7, 1986
Creator:
Lee, S. Y.; Tepikian, S. & Courant, E. D.
Object Type:
Report
System:
The UNT Digital Library
Accelerator and final focus model for an induction Linac based HIF system study
An overview of the assumptions and models incorporated in the ongoing Induction-Linac-based, HIF System Assessment is presented. Final transport, compression and final focus pose constraints which form a critical link between the accelerator and target requirements. A recent analysis has shown that system costs may be considerably reduced by the use of multiply charges ions. The assumptions underlying this direction are described.
Date:
July 1, 1986
Creator:
Lee, Edward P.
Object Type:
Article
System:
The UNT Digital Library
Accelerator dynamics and beam aperture
We present an analytical method for analyzing accelerator dynamics, including higher order effects of multipoles on the beam. This formalism provides a faster alternative to particle tracking. Simplectic expressions for the emittance and phase describing the dynamical behavior of a particle in a circular accelerator are derived using second order perturbation theory (in the presence of nonlinear elements, e.g., sextupoles, octupoles). These expressions are successfully used to calculate the emittance growth, smear and linear aperture. Our findings compare well with results obtained from tracking programs. In addition perturbation to betatron tune; resonance strengths; stop bandwidth; fixed points; island width; and Chirikov criteria are calculated.
Date:
October 1, 1986
Creator:
Parsa, Z.
Object Type:
Article
System:
The UNT Digital Library
Accelerator Technology Program. Status report, April-September 1985
This report presents highlights of major projects in the Accelerator Technology (AT) Division of the Los Alamos National Laboratory. Radio-frequency and microwave technology are dealt with. The p-bar gravity experiment, accelerator theory and simulation activities, the Proton Storage Ring, and the Fusion Materials Irradiation Test accelerator are discussed. Activities on the proposed LAMPF II accelerator, the BEAR (Beam Experiment Aboard Rocket) project, beam dynamics, the National Bureau of Standards racetrack microtron, and the University of Illinois racetrack microtron are covered. Papers published by AT-Division personnel during this reporting period are listed.
Date:
September 1, 1986
Creator:
Jameson, R.A. & Schriber, S.O. (comps.)
Object Type:
Report
System:
The UNT Digital Library
Accelerator technology program. Status report, October 1984-March 1985
Activities of the racetrack-microtron development programs are highlighted, one of which is being done in collaboration with the National Bureau of Standards and the other with the University of Illinois; the BEAR (Beam Experiment Aboard Rocket) project; work in beam dynamics; the proposed LAMPF II accelerator; and the Proton Storage Ring. Discussed next is radio-frequency and microwave technology, followed by activities in accelerator theory and simulation, and free-electron laser technology. The report concludes with a listing of papers published during this reporting period.
Date:
April 1, 1986
Creator:
Jameson, R.A. & Schriber, S.O. (comps.)
Object Type:
Report
System:
The UNT Digital Library
The acceptance of the SSC (Superconducting Supercollider) clustered lattice
The physical apertures of all elements of the SSC storage lattices are considered to determine whether correction of random multipole fields in the triplet quadrupoles is necessary when betatron amplitudes there are no more than the inner radius of the beam pipe. During computer simulated beam tracking the influence of random multiple fields was included as a kick given to the test particle at the center of each quadrupole and at the ends of every dipole. The degree of multipole correction needed is shown. (LEW)
Date:
January 1, 1986
Creator:
Dell, G.F.
Object Type:
Article
System:
The UNT Digital Library
Accomplishments of the Oak Ridge National Laboratory Seed Money program
In 1974, a modest program for funding new, innovative research was initiated at ORNL. It was called the ''Seed Money'' program and has become part of a larger program, called Exploratory R and D, which is being carried out at all DOE national laboratories. This report highlights 12 accomplishments of the Seed Money Program: nickel aluminide, ion implantation, laser annealing, burn meter, Legionnaires' disease, whole-body radiation counter, the ANFLOW system, genetics and molecular biology, high-voltage equipment, microcalorimeter, positron probe, and atom science. (DLC)
Date:
September 1, 1986
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Accretion of Matter Onto Highly Magnetized Neutron Stars: Final Report, July 1-September 30, 1985
A final report is given of two research projects dealing with magnetic fields of neutron stars. These are the modulation of thermal x-rays from cooling neutron stars and plasma instabilities in neutron star accretion columns. (DWL)
Date:
June 1, 1986
Creator:
Hernquist, L.
Object Type:
Report
System:
The UNT Digital Library
Accuracy of diagnosis and consequences of misdiagnosis of disorders causing dementia
This report discusses the diagnosis of clinical syndrome of dementia, accuracy of differential diagnosis of dementig disorders, prognosis and prognostic accuracy, public health consequences of misdiagnosis,and summary of recommendations.
Date:
June 1986
Creator:
Katzman, Robert; Lasker, Bruce & Bernstein, Nancy
Object Type:
Report
System:
The UNT Digital Library
Accuracy of Nodal Transport and Simplified-P3 Fluxes in Benchmark Tests
Here we summarize recent work exploring the accuracy of fluxes computed, both by nodal transport methods, and by the simplified-spherical harmonics (SP/sub l/) method. Apparently, significant errors in nodal transport fluxes were first noted by Wagner et al., and attributed to the isotopic-transverse-leakage (ITL) approximation. Later Lawrence detected substantial errors, due to the ITL approximation, in his nodal transport (NTT) solution of the IAEA Stepanek benchmark problem. Gelbard concluded on theoretical grounds that nodal transport fluxes, computed in XY geometry using ITL, should be much more accurate on the coordinate axes than halfway between them and that, at 45/sup 0/ from the axes, nodal transport methods using ITL should give only about half of the true transport correction.
Date:
January 1, 1986
Creator:
Liu, Y.W.H. & Gelbard, E.M.
Object Type:
Article
System:
The UNT Digital Library
Accurate interatomic potentials for Ni, Al and Ni/sub 3/Al
To obtain meaningful results from atomistic simulations of materials, the interatomic potentials must be capable of reproducing the thermodynamic properties of the system of interest. Pairwise potentials have known deficiencies that make them unsuitable for quantitative investigations of defective regions such as crack tips and free surfaces. Daw and Baskes (Phys. Rev. B 29, 6443 (1984)) have shown that including a local ''volume'' term for each atom gives the necessary many-body character without the severe computational dependence of explicit n-body potential terms. Using a similar approach, we have fit an interatomic potential to the Ni/sub 3/Al alloy system. This potential can treat diatomic Ni/sub 2/, diatomic Al/sub 2/, fcc Ni, fcc Al and L1/sub 2/ Ni/sub 3/Al on an equal footing. Details of the fitting procedure are presented, along with the calculation of some properties not included in the fit.
Date:
January 1, 1986
Creator:
Voter, Arthur F. & Chen, Shao Ping
Object Type:
Article
System:
The UNT Digital Library
[ACDFA Dance Recital]
Video footage of a dance recital by the American College Dance Festival Association.
Date:
April 3, 1986
Creator:
University of North Texas. Center for Media Production.
Object Type:
Video
System:
The UNT Digital Library
[ACDFA Dance Recital]
Video footage of a dance recital by the American College Dance Festival Association. This video also includes information about this program.
Date:
April 3, 1986
Creator:
University of North Texas. Center for Media Production.
Object Type:
Video
System:
The UNT Digital Library
Acid-split flowsheets for uranium-plutonium partitioning without a reductant
The flowsheet discussed has been tested in a hot cell experiment using 10% TBP and a poorly controlled temperature near 15/sup 0/C. The test was carried out in the Solvent Extraction Test Facility at Oak Ridge National Laboratory, using highly irradiated mixed-oxide fuel from the Fast Flux Test Facility reactor at Hanford, Washington. The observed concentration profiles for U, Pu, and acid are shown graphically.
Date:
January 1, 1986
Creator:
Campbell, D.O.; Crouse, D.J. & Mills, A.L.
Object Type:
Article
System:
The UNT Digital Library
Acoustic damping for explicit calculations of fluid flow at low Mach number
A method is proposed for damping the sound waves in explicit calculations of fluid flow at low Mach number, where sound waves are usually not of interest but may distract attention from other flow features. The method is based on the introduction of an artificial pressure q of the form q = - q/sub 0/rhoc/sup 2/..delta..t(del x u - del x u/sub 0/), where q/sub 0/ is a coefficient of order unity, rho is the density, c is the sound speed, ..delta..t is the time step, and u/sub 0/ is the velocity field that would obtain at zero Mach number. When del x u/sub 0/ is zero, the method becomes equivalent to the use of an artificial bulk viscosity q/sub 0/rhoc/sup 2/..delta..t. However, del x u/sub 0/ can be substantially different from zero in problems with heat or mass sources (e.g., combustion), and its inclusion is then essential to obtain the correct pressure field. The method is well suited for use in conjunction with explicit numerical schemes that employ acoustic subcycling or artificial reduction of the sound speed for improved efficiency at low Mach number. The beneficial effects of the method are illustrated by means of calculations with an acoustic …
Date:
January 1, 1986
Creator:
Ramshaw, J. D.; O'Rourke, P. J. & Amsden, A. A.
Object Type:
Report
System:
The UNT Digital Library
Acoustic velocity measurements on fluid metals from two-fold compressions to two-fold expansions
Methods used for making acoustic velocity measurements on samples which are destroyed in time scales of milliseconds or less are described. Analytic techniques for using this data to calculate thermodynamic quantities are outlined. New results indicating a linear relationship of acoustic velocity with density over a very large density range are presented. 30 refs., 5 figs. (DWL)
Date:
January 1, 1986
Creator:
Shaner, J. W.; Hixson, R. S.; Winkler, M. A. & Brown, J. M.
Object Type:
Article
System:
The UNT Digital Library
Acoustic wave scattering from a circular crack: comparison of different computational methods
The work reported was motivated by disagreement between the results obtained from two computations of scattering of an axially incident elastic p-wave on a circular crack. One calculation involves the direct solution of the Helmholtz integral equation, showing an oscillating total cross section. The other uses a program called MOOT, in which the elastic displacement near the crack is expanded in regular spherical eigenfunctions of the elastic wave equation. This calculation shows that the oscillations in total cross section disappear rapidly at high wave numbers. The conjecture that the basis for the MOOT expansion was inappropriate is examined by application to a test problem. Results indicate that there is no inadequacy in the spherical basis set. (LEW)
Date:
January 1, 1986
Creator:
Visscher, W.M.
Object Type:
Article
System:
The UNT Digital Library
The ACP (Advanced Computer Program) multiprocessor system at Fermilab
The Advanced Computer Program at Fermilab has developed a multiprocessor system which is easy to use and uniquely cost effective for many high energy physics problems. The system is based on single board computers which cost under $2000 each to build including 2 Mbytes of on board memory. These standard VME modules each run experiment reconstruction code in Fortran at speeds approaching that of a VAX 11/780. Two versions have been developed: one uses Motorola's 68020 32 bit microprocessor, the other runs with AT and T's 32100. both include the corresponding floating point coprocessor chip. The first system, when fully configured, uses 70 each of the two types of processors. A 53 processor system has been operated for several months with essentially no down time by computer operators in the Fermilab Computer Center, performing at nearly the capacity of 6 CDC Cyber 175 mainframe computers. The VME crates in which the processing ''nodes'' sit are connected via a high speed ''Branch Bus'' to one or more MicroVAX computers which act as hosts handling system resource management and all I/O in offline applications. An interface from Fastbus to the Branch Bus has been developed for online use which has been tested …
Date:
September 1986
Creator:
Nash, T.; Areti, H.; Atac, R.; Biel, J.; Case, G.; Cook, A. et al.
Object Type:
Article
System:
The UNT Digital Library