Digital Commons Network^™

Barium Concentration In Rock Varnish: Implications For Calibrated Rock Varnish Dating Curves, C. D. Harrington, D. J. Krier, R. Raymond Jr., S. L. Reneau

Scanning Microscopy

Cation-ratio dating of rock varnish is a recently developed technique for obtaining surface exposure ages of a wide variety of geomorphic surfaces. As originally proposed, the technique utilizes a ratio among minor cations [(K+Ca)/Ti] in rock varnish. Although this varnish cation ratio is related to the Ti concentration, it can also be affected by the presence of Ba that may be partially included in the analyzed concentration of Ti. Barium is a minor constituent found in virtually all rock varnishes sampled from the Lake Mead area, Las Vegas Valley, and the Crater Flat region of southern Nevada. Barium is heterogeneously …

Phenomena Relating To Charge In Insulators: Macroscopic Effects And Microscopic Causes, Jacques Cazaux, Claude Le Gressus

Scanning Microscopy

Conservation of current under steady-state conditions makes it possible to determine the sign of charges trapped in an insulator subjected to ionizing radiation. The maximum value of the surface potential can thus be estimated.

On the basis of a given trapped charge distribution, the pattern of the electrical field and of the potential can thus be established, and the influence of the shape of the sample and its environment can be clearly shown. Change of trapped charges with time (at the start and after irradiation) is then examined. Finally, the microscopic causes of trapping of charge is suggested by analogy …

Beyond The Wasatch: The History Of Irrigation In The Uinta Basin And Upper Provo River Area Of Utah, Gregory D. Kendrick, Charles S. Peterson, National Park Service, Bureau Of Reclamation

All U.S. Government Documents (Utah Regional Depository)

This book deals with the development of water resources Water, of course, has been one of the great factors tn the growth of the American West . Beyond the Wasatch details the process by which water flowing from the southwest drainages of northern Utah's Uinta Mountains was put to human use. The story belongs primarily to the first half of the 20th century, although parts of it extend to both earlier and later times. The water involved rises within the State of Utah, and its utilization had implications mainly for Utah. Development involved native Americans and the settlement of a …

Wyoming Statewide Wilderness Study Report, Wilderness Study Area Specific Recommendations, Volume Ii, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The WSA was studied under section 603 of the Federal Land Policy and Management Act of 1976 (FLPMA) and was included in the Grass Creek/Cody Wilderness Environmental Impact Statement (EIS) filed in August 1990. There were two alternatives analyzed in the EIS, No Wilderness and All Wilderness. The All Wilderness Alternative is the recommendation of this report.

Silicon (2p) Surface Core-Level Line Shape Of Si(111)—B, J. E. Rowe, G. K. Wertheim, D. Mark Riffe

All Physics Faculty Publications

Several recent structural studies of the Si(111)–B ((3)^1/2×(3)^1/2) surface have established that the boron atoms occupy substitutional sites in the second full Si layer and have Si adatoms directly above them. High‐resolution (∼80–100 meV) Si(2p) core‐level photoemission was used to determine the B‐induced perturbation of the surface Si atoms. The samples were prepared by surface segregation from Si(111) wafers (∼1.5 at. % B) after thermally removing the thin protective oxide layer on the surface. Photoemission spectra for photon energies from 110 to 140 eV show three peaks, indicative of at least two well‐separated spin‐orbit …

Feeder/Slaughter Cattle Analysis, Donald L. Snyder, Richard A. Wilde

Economic Research Institute Study Papers

No abstract provided.

A Deformation Theory Of Self-Dual Einstein Spaces, Charles G. Torre

All Physics Faculty Publications

The self-dual Einstein equations on a compact Riemannian 4-manifold can be expressed as a quadratic condition on the curvature of an $SU(2)$ (spin) connection which is a covariant generalization of the self-dual Yang-Mills equations. Local properties of the moduli space of self-dual Einstein connections are described in the context of an elliptic complex which arises in the linearization of the quadratic equations on the $SU(2)$ curvature. In particular, it is shown that the moduli space is discrete when the cosmological constant is positive; when the cosmological constant is negative the moduli space can be a manifold the dimension of which …

Harmonic Gauge In Canonical Gravity, K. V. Kuchal, Charles G. Torre

All Physics Faculty Publications

The Isham-Kuchař representation theory of the spacetime diffeomorphism group in canonical geometrodynamics is implemented in the context of harmonic coordinate conditions. The representation is carried by either an extended phase space, consisting of the cotangent bundle over the space of three-metrics, spacelike embeddings, and Lagrange multipliers which serve to enforce the harmonic gauge in the action, or by a reduced space in which the multipliers are eliminated. The approach used here is applicable to any generally covariant theory and to any coordinate conditions. The physical interpretation of the diffeomorphism Hamiltonians is discussed and compared with the analogous interpretation given by …

Field-Aligned Current Associated With A Distorted Two-Cell Convection Pattern During Northward Interplanetary Magnetic Field, Lie Zhu, Robert W. Schunk, Jan Josef Sojka

All Physics Faculty Publications

A systematic study of the influence of the ionospheric conductance on the field-aligned current associated with a distorted two-cell convection pattern during northward interplanetary magnetic field (IMF) has been conducted. Our modeling results indicate that the NBZ current can be associated with the distorted two-cell convection for most of the ionospheric conductivity conditions. It is shown that the conductivity conditions related to the seasonal variation and the aurora activity can significantly influence the basic features of the field-aligned current associated with a distorted two-cell convection pattern. It is found that the increase of the field-aligned current in the polar cap …

Flood Insurance Study, City Of Bountiful, Utah, Davis County, Federal Emergency Management Agency

All U.S. Government Documents (Utah Regional Depository)

This Flood Insurance Study revises and updates a previous Flood Insurance Study/Flood Insurance Rate map for City of Bountiful, Davis County, Utah. This information will be used by the City of Bountiful to update existing floodplain regulations as part of the Regular Phase of the National Flood Insurance Program (NFIP). The information will also be used by local and regional planners to further promote sound land use and floodplain development.

Wyoming Wilderness Study Report Statewide Overview, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The BLM began the wilderness review in accordance with the requirements of Section 603(c) of the Federal Land Policy and Management Act (FLPMA) dated October 21, 1976. This Act mandated that within 15 years the BLM would inventory and study its lands for their wilderness suitability and that based on this review, the Secretary of Interior would forward his wilderness recommendations to the President.

Wyoming Statewide Wilderness Study Report Wilderness Study Area Specific Recommendations, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

The recommendation for this WSA is to designate 17,150 acres of BLM land and 1,390 acres of State land as wilderness. This alternative is considered to be the environmentally preferable alternative as it would result in the least change in the natural environment over the long term. The entire 17,150 acres of federal land and 1,390 acres of state land within the WSA are recommended for wilderness designation and are shown on the Bobcat Draw Badlands WSA map. The state lands would be recommended for acquisition to enhance the manageability of the area as wilderness.

Surficial Geologic Map Of The Oak City Area, Millard County, Utah, United States Geological Survey

All U.S. Government Documents (Utah Regional Depository)

This map is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.

Utah Multihazards Planning Demonstration Project - A Case Study Report, United States Federal Emergency Management Agency

All U.S. Government Documents (Utah Regional Depository)

This report is intended to describe, document, and evaluate the approach used in the Utah Multihazards Mitigation Project (UMP) which culminated in the Utah Plan, and to make that project experience available for use by other State and local governments throughout the nation. The report summarizes the planning and decision-making process followed, describes the specific mitigation measures identified, and assesses the transferability of the Utah approach and requirements for its replication by other State and local governments.

Fuel Moisture As Measured And Predicted During The 1988 Fires In Yellowstone Park, U.S. Forest Service

All U.S. Government Documents (Utah Regional Depository)

Fine fuel moisture content, relative humidity, air temperature, and fire behavior were observed hourly for 48 hours on the North Fork fire in Yellowstone National Park from August 25 to August 27, 1988.

Ionospheric Physics, Jan Josef Sojka

All Physics Faculty Publications

The author has taken a parochial view of the subject matter
under the title of ionospheric physics. Physics is used as the
key to separating this section of the aeronomy review from the
other aeronomy reports. Specifically, work categorized as
chemistry, optical emissions, and thermosphere will not be
reviewed in this section. However, coupling to the
thermosphere and more specifically to the magnetosphere is
considered. A brief section is also included on active
experiments which is a productive area in plasma physics and
also to some extent in ionospheric physics, but one that has
fallen on hard times with regard …

Lecture 16: What I Was Hired To Do Is Not Part Of My Job, James A. Macmahon

Last Lectures

No abstract provided.

Revised Global Model Of Thermosphere Winds Using Satellite And Ground-Based Observations, A E. Hedin, M A. Biondi, R G. Burnside, G Hernandez, R M. Johnson, T L. Killeen, C Mazaudier, J W. Meriwether, J E. Salah, R W. Smith, N W. Spencer, Vincent B. Wickwar, T S. Virdi

All Physics Faculty Publications

Thermospheric wind data obtained from the Atmosphere Explorer E and Dynamics Explorer 2 satellites have been combined with wind data for the lower and upper thermosphere from ground-based incoherent scatter radar and Fabry-Perot optical interferometers to generate a revision (HWM90) of the HWM87 empirical model and extend its applicability to 100 km. Comparison of the various data sets with the aid of the model shows in general remarkable agreement, particularly at mid and low latitudes. The ground-based data allow modeling of seasonal/diurnal variations, which are most distinct at mid latitudes. While solar activity variations are now included, they are found …

Onset Of Convection For Autocatalytic Reaction Fronts: Laterally Unbounded System, Boyd F. Edwards, J. W. Wilder, K. Showalter

All Physics Faculty Publications

The linear stability of exothermic autocatalytic reaction fronts that convert unreacted fluid into a lighter reacted fluid is considered using the viscous thermohydrodynamic equations. For upward front propagation and a thin front, the discontinuous jump in density at the front is reminiscent of the Rayleigh-Taylor problem of an interface between two immiscible fluids, whereas the vertical thermal gradient near the front is reminiscent of the Rayleigh-Bénard problem of a fluid layer heated from below. The problem is also similar to flame propagation, except that here the front propagation speed is limited by catalyst diffusion rather than by activation kinetics. For …

Restoration And Expansion Of Bear River Migratory Bird Refuge, Brigham City, Utah, Environmental Assessment, U.S. Fish And Wildlife Service

Environmental Assessments (UT)

This Environmental Assessment is designed to evaluate possible actions for preserving and managing the wetland habitat on Bear River Migratory Bird Refuge (Refuge) and to consider additional wetlands for protection of environmental, wildlife, and recreational values.

Exxon Wyoming-Dakota Pipeline Segment 2 And Hartzog Draw Unit Co2 Projects Environmental Assessment, United States Department Of The Interior Bureau Of Land Management

Environmental Assessments (WY)

This Environmental Assessment (EA) has been prepared to analyze potential impacts from the proposed completion of Segment 2 of the Wyoming-Dakota pipeline and the Hartzog Draw Unit CO2 Project. The impacts of constructing the pipeline were originally analyzed in the Bairoil/Dakota CO2 Project's Environmental Impact Statement (EIS). The Record of Decision for that document was signed in February 1986, and construction on the first segment was completed in September 1986. This EA analyzes the possible environmental and socioeconomic impacts which could result from the proposals, and to solicit public comments and concerns. This document also serves as a request for …

Rainbow Bridge National Monument General Management Plan, Development Concept Plan, Resource Management Plan, Interpretive Prospectus, And Environmental Assessment, United States, Department Of The Interior, National Park Service

Resource Management Plans (UT)

This General Management Plan provides the National Park Service with direction for long-range management, development, and use of the Rainbow Bridge National Monument. The plan responds to new issues identified during the planning process when the draft plan was published in September of 1990. A main concern expressed during public review of the draft plan was diverse public expectations for visitor experience, crowding, and the high number of visitors accessing a limited area of Rainbow Bridge. In addition, the plan and environmental assessment address these diverse public expectations along with the issues of a visitor experience, protection of natural and …

Exact And Asymptotic Scaling Solutions For Fragmentation With Mass Loss, M. Cai, Boyd F. Edwards, H. Han

All Physics Faculty Publications

Exact and asymptotic solutions to a linear rate equation for fragmentation with mass loss are presented. Solutions for spatially discrete random bond annihilation illustrate the mutual exclusiveness of the fragmentation and recession terms in the rate equation. Exact solutions for deterministic equal fragment recession show that continuous mass loss between fragmentation events can be approximated by discrete mass loss during fragmentation events when this mass loss is small. Evidence that continuous and discrete mass loss preclude shattering mass loss, the loss of mass to zero-mass particles due to runaway fragmentation, is presented. General asymptotic scaling forms, general solutions reflecting arbitrary …

Project Reports, Various Authors

Other Documents

No abstract provided.

Gaussian Reference Fluid And Interpretation Of Quantum Geometrodynamics, Karel Kucha, Charles G. Torre

All Physics Faculty Publications

The Wheeler-DeWitt equation of vacuum geometrodynamics is turned into a Schrödinger equation by imposing the normal Gaussian coordinate conditions with Lagrange multipliers and then restoring the coordinate invariance of the action by parametrization. This procedure corresponds to coupling the gravitational field to a reference fluid. The source appearing in the Einstein law of gravitation has the structure of a heat-conducting dust. When one imposes only the Gaussian time condition but not the Gaussian frame conditions, the heat flow vanishes and the dust becomes incoherent. The canonical description of the fluid uses the Gaussian coordinates and their conjugate momenta as the …

Predation Risk And The Importance Of Cover For Juvenile Rainbow Trout In Lentic Systems, R. A. Tabor, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Juvenile rainbow trout Oncorhynchus mykiss stocked in midelevation reservoirs in Utah inhabit shallow nearshore areas and are vulnerable to predation from piscivorous fish and birds. We determined the use and importance of nearshore habitats by (1) measuring habitat selection by, prey availability to, and feeding of juvenile rainbow trout in two reservoirs with populations of predators, and (2) measuring survival and growth rates in the presence and absence of cover in a pond experiment where adult brown trout Salmo trutta were predators. In the reservoirs juvenile rainbow trout (60–120 mm standard length) were abundant in complex inshore habitats but avoided …

The Contribution Of Milk Serum Proteins To The Development Of Whipped Cream Structure, Eric C. Needs, Alan Huitson

Food Structure

The role of milk serum proteins in the development of foam structure during the whipping of 38% fat cream was investigated. Proteins were removed from the aqueous phase by washing the cream with simulated milk ultrafiltrate. The natural protein complement was replaced with either casein or whey protein preparations. When creams with different protein compositions were whipped to a defined end point the structural properties of the foams were similar but removal of protein caused a 50% reduction in whipping time. Other creams were whipped for fixed times of between 30 and 180 seconds to investigate the development and formation …

Effect Of Extruder Die Temperature On Texture And Microstructure Of Restructured Mechanically Deboned Chicken And Corn Starch, V. B. Alvarez, D. M. Smith, S. Flegler

Food Structure

Proximate composition, textural properties and microstructural changes of mechanically deboned chicken/15% corn starch extrudates were evaluated when restructured at die temperatures of 25, 71, 82, 93 , 104 and ll5°C in a twin-screw extruder. Total sol ids and fat content decreased, whereas protein content increased die temperatures were increased. When die temperature was increased from 71°C to 104°C, apparent stress at failure of extrudates increased by 44 kPa , but decreased at a die temperature of 115°C. Changes in the protein matrix, fat globules and starch granules due to changes i n extruder die temperature were observed by scanning electron …

Calibration Of A Parametric-Stochastic Model, Zhida Song, L. Douglas James

Reports

Conceptually, stochastic parametric modeling offers a powerful tool to select a scale for expressing catchment variability for hydrologic simulation and relating model parameters to catchment characteristics. Practically, success depends on having an efficient method for model calibration. The calibration of a stochastic model is much more difficult than a deterministic one because simulation shifts from using fixed parameters to simulate of flows as deterministic values to taking multiple combinations of paramter values randomly from distributions to simulate flows as stochastic variables. The proposed method calibrates the first two moments of each parameter distribution to represent the average and the variability …

Studies Related To Nutrients Entering Groundwater From The Heber Valley Sewer Farm And Dairies, Roland W. Jeppson, Joan Mclean, Calvin G. Clyde, Scott Korom

Reports

Foreword: This report includes the results from a two year study in the Heber Valley to determine amounts of nutrients that are entering the groundwaters of the Heber Valley, and might ultimately enter Deer Creek Reservoir. Since Deer Creek Reservoir in Heber Valley, Utah supplies approximately 65 percent of the water distributed to Salt Lake County, the maintenance of its quality is of considerable importance. To maintain the quality of this reservoir and limit its eutrophication "best management" practices for surface water have been implemented gradually during the past decade in Heber Valley. These practices have significantly improved the qualities …