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Problem Analysis For The Vegetation Diversity Project, David A. Pyke, Michael M. Borman, U.S. Department Of The Interior, Bureau Of Land Management Feb 1993

Problem Analysis For The Vegetation Diversity Project, David A. Pyke, Michael M. Borman, U.S. Department Of The Interior, Bureau Of Land Management

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

Management of the majority of public rangeland in the Great Basin and Columbia-Snake River Plateau falls under the authority of the Bureau of Land Management. The flora of this land ranges from highly diverse native plant communities to deteriorated lands dominated by exotic annuals. Approximately nine percent of the BLM’s 78 million acres of public land in this region is degraded to such a degree that changes in land management alone will not result in significant improvement. The BLM intends to restore native plant communities on these deteriorated lands, but current revegetation techniques used to establish introduced perennial grasses are …

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Vascular Remodeling In Hypertension, Gary L. Baumbach, Shams Ghoneim Jan 1993

Vascular Remodeling In Hypertension, Gary L. Baumbach, Shams Ghoneim

Scanning Microscopy

Cerebral arterioles in stroke-prone spontaneously hypertensive rats (SHRSP) paradoxically become more distensible, despite hypertrophy of the vessel wall. Cerebral arterioles in SHRSP also undergo remodeling with a reduction in external diameter. Based on these findings, we have proposed the concept that remodeling of cerebral arterioles may be an important mechanism, in addition to hypertrophy, for encroachment on the vascular lumen in SHRSP. The purpose of this review is threefold. First, consequences of vascular hypertrophy that have been proposed previously are reviewed with an emphasis on the hypothesis that encroachment on the vascular lumen by hypertrophy is an important mechanism …

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Canyonlands National Park And Orange Cliffs Unit Of Glen Canyon National Recreation Area Environmental Assessment For Backcountry Management Plan, National Park Service Jan 1993

Canyonlands National Park And Orange Cliffs Unit Of Glen Canyon National Recreation Area Environmental Assessment For Backcountry Management Plan, National Park Service

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

Whether on foot, bicycle, horseback, or in vehicles, most visitors come to Canyonlands National Park (Canyonlands) to experience solitude or to "get away from people." Yet visitation to Canyonlands has risen exponentially over the past five years (Figures 1 and 2). Visitation is expected to continue to rise. As a function of this increase in number of visitors, adverse impacts to Canyonlands' resources have increased and the visitors' ability to find solitude has decreased. Since the mandate of the National Park Service (NPS) is to balance visitor access to the parks with preservation and protection of natural and cultural resources, …

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Predicting Regeneration Establishment With The Prognosis Model, United States Department Of Agriculture, Forest Service Jan 1993

Predicting Regeneration Establishment With The Prognosis Model, United States Department Of Agriculture, Forest Service

Forestry

Conifer establishment following regeneration timber harvests is predicted by version 2 of the Regeneration Establishment Model, a submodel of the Prognosis Model. The regeneration model covers 10 species for forests in Montana, central Idaho, and northern Idaho. Most harvest and site preparation methods can be simulated so that alternative treatments can be evaluated. Also included in the model is the influence of western spruce budworm (Choristoneura accidentalis) on regeneration success. The model predicts the probability of stocking, seedling density, species composition, and seedling heights 2 to 20 years after harvest. This paper describes the study design, equation development, model formulation, …

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Vector Autoregression Analysis Of Exchange Rate Movement, Rajiv Mallick, Basudeb Biswas Jan 1993

Vector Autoregression Analysis Of Exchange Rate Movement, Rajiv Mallick, Basudeb Biswas

Economic Research Institute Study Papers

No abstract provided.

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Compensating Variation Consumer's Surplus Via Successive Approximations, Kenneth S. Lyon, Ming Yan Jan 1993

Compensating Variation Consumer's Surplus Via Successive Approximations, Kenneth S. Lyon, Ming Yan

Economic Research Institute Study Papers

Many economists agree that the best measure of consumer's surplus is the compensating variation consumer's surplus (eVeS); however, because the compensated demand function is not observable, there are problems of using this measure in empirical applications. There are ways around this limitation that work well under certain circumstances; however, until now there has been no solution that always works well. We introduce a successive approximations method of calculating compensating variation consumer's surplus using data from the ordinary. demand curve. In doing so we numerically identify the compensated demand function over the price interval involved. This procedure can be implemented on …

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X-Ray Topography, A. Zarka Jan 1993

X-Ray Topography, A. Zarka

Scanning Microscopy

The purpose of this paper is to discuss some elements of dynamical theory and to introduce some basic ideas on defect image formation in X-ray topographs. After some explanations of the basic principles of dynamical theory of X-rays, examples of defect contrast are given. Two examples of studies of quartz single crystals by X-ray topography are developed. First, the analysis of the X-ray spherical wave topographs of various Y-cut plates of synthetic quartz crystals show that the coherence of the lattice between the seed and the grown crystal is directly related to the density of the dislocations present in the …

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Femtosecond Thermionic Emission In The Space-Charge Limited Regime, D. Mark Riffe, X. Y. Wang, M. C. Downer, D. L. Fisher, T. Tajima, J. L. Erskine Jan 1993

Femtosecond Thermionic Emission In The Space-Charge Limited Regime, D. Mark Riffe, X. Y. Wang, M. C. Downer, D. L. Fisher, T. Tajima, J. L. Erskine

All Physics Faculty Publications

We study femtosecond-laser-pulse-induced electron emission from W(100), Al(110), and Ag(lll) in the sub-damage regime (1–44 mJ/cm2 fluence) by simultaneously measuring the incident-light reflectivity, total electron yield, and electron-energy distribution curves of the emitted electrons. The total-yield results are compared with a space-charge-limited extension of the Richardson-Dushman equation for short-time-scale thermionic emission and with particle-in-a-cell computer simulations of femtosecond-pulsed-induced thermionic emission. Quantitative agreement between the experimental results and two calculated temperature-dependent yields is obtained and shows that the yield varies linearly with temperature beginning at a threshold electron temperature of ~0.25 eV The particle-in-a-cell simulations also reproduce the experimental electron-energy …

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Parameterized Study Of The Ionospheric Modification Associated With Sun-Aligned Polar Cap Arcs, D. J. Crain, Jan Josef Sojka, Robert W. Schunk, Lie Zhu Jan 1993

Parameterized Study Of The Ionospheric Modification Associated With Sun-Aligned Polar Cap Arcs, D. J. Crain, Jan Josef Sojka, Robert W. Schunk, Lie Zhu

All Physics Faculty Publications

Sun-aligned (SA) arcs are a prevalent feature of the polar cap ionosphere during northward interplanetary magnetic field conditions. These arcs are, like the auroral arc, a complex electrodynamic system coupling the ionosphere and magnetosphere. The electron precipitation and convection electric field associated with this system modify the polar cap ionospheric plasma distribution. In the past decade, a wealth of observational information has indicated the complexity of these ionospheric modifications, but only a limited number of model studies have been carried out to elucidate the changes associated with SA arcs. In this investigation, an extensive parametric study has been conducted to …

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Modeling Polar Cap F-Region Patches Using Time Varying Convection, Jan Josef Sojka, M. D. Bowline, Robert W. Schunk, D. T. Decker, Cesar E. Valladares, R. Sheehand, D. N. Anders, R. A. Heelis Jan 1993

Modeling Polar Cap F-Region Patches Using Time Varying Convection, Jan Josef Sojka, M. D. Bowline, Robert W. Schunk, D. T. Decker, Cesar E. Valladares, R. Sheehand, D. N. Anders, R. A. Heelis

All Physics Faculty Publications

Creation of polar cap F‐region patches are simulated for the first time using two independent physical models of the high latitude ionosphere. The patch formation is achieved by temporally varying the magnetospheric electric field (ionospheric convection) input to the models. The imposed convection variations are comparable to changes in the convection that result from changes in the By IMF component for southward interplanetary magnetic field (IMF). Solar maximum‐winter simulations show that simple changes in the convection pattern lead to significant changes in the polar cap plasma structuring. Specifically, in winter, as enhanced dayside plasma convects into the polar …

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Influence Of Horizontal Inhomogeneity In The Ionosphere On The Reflection Of Alfvén Waves, Lie Zhu, Jan Josef Sojka, Robert W. Schunk, D. J. Crain Jan 1993

Influence Of Horizontal Inhomogeneity In The Ionosphere On The Reflection Of Alfvén Waves, Lie Zhu, Jan Josef Sojka, Robert W. Schunk, D. J. Crain

All Physics Faculty Publications

A study of the reflection of Alfvén waves at a horizontally inhomogeneous ionosphere has been carried out. In this study, the Alfvén speed above the ionosphere is assumed to be uniform and the ionosphere is treated as a height‐integrated conducting slab. Analytical and numerical results indicate that the horizontal nonuniformity of the ionospheric conductivity can lead to a rotation of the reflected wave fields and cause field‐aligned currents that originate in the ionosphere. A strong conductivity nonuniformity in the direction perpendicular to the incident wave field, large Hall to Pedersen conductivity ratios, and low conductivity values lead to a large …

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1993 Annual Report, Various Authors Jan 1993

1993 Annual Report, Various Authors

Annual Reports

No abstract provided.

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Symposium—In The Media, A Woman’S Place, Ted Pease Jan 1993

Symposium—In The Media, A Woman’S Place, Ted Pease

Journalism and Communication Faculty Publications

FOR WOMEN AND THE MEDIA, 1992 was a year of sometimes painful change-the aftermath of the Anita HillClarence Thomas hearings; the public spectacle of a vice president's squabble with a fictional TV character; Hillary Rodham Clinton's attempt to redefine the role of the political wife; election of women to Congress and to state offices in unprecedented numbers.

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Evaluation Of Roadside Stabilization And Beautification Plantings In South-Central Utah, United States Department Of Agriculture, Forest Service Jan 1993

Evaluation Of Roadside Stabilization And Beautification Plantings In South-Central Utah, United States Department Of Agriculture, Forest Service

Plants

Numerous roadside plantings at semiarid sites in the south-central Utah counties of Juab, Sanpete, and Sevier were intended to stabilize roadsides with plants harmonizing with natural vegetation. The plantings, originally for demonstration, began in the 1950's. They included bareroot transplants and direct seedings. Soils and geologic substrates at six sites were analyzed for 15 characteristics. Plant performance and survival was summarized for 37 sites. Thirty species established well by direct seeding and 62 species established well from transplants. Numerous other species have also persisted at the planting sites but are not as vigorous or as well adapted. Direct seedings were …

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Flood Insurance Study, City Of Price, Utah, Carbon County, Federal Emergency Management Agency Jan 1993

Flood Insurance Study, City Of Price, Utah, Carbon 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 the City of Price, Carbon County, Utah. This information will be used by the City of Price 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.

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Flood Insurance Study, Carbon County, Utah, Unincorporated Areas, Federal Emergency Management Agency Jan 1993

Flood Insurance Study, Carbon County, Utah, Unincorporated Areas, Federal Emergency Management Agency

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

The purpose of this Flood Insurance Study is to investigate the existence and severity of flood hazards in the unincorportated areas of Carbon County, Utah, and to aid in the administration of the National Flood Insurance Act of 1968 and the Flood Disaster Protection Act of 1973. Initial use of this information will be to convert Carbon County to the regular program of flood insurance by the Federal Insurance Administration. Further use of the information will be made by local and regional planners in their efforts to promote sound land use and flood plain development.

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Conceptual Evaluation Of Regional Ground-Water Flow In The Carbonate-Rock Province Of The Great Basin, Nevada, Utah, And Adjacent States, United States Geological Survey Jan 1993

Conceptual Evaluation Of Regional Ground-Water Flow In The Carbonate-Rock Province Of The Great Basin, Nevada, Utah, And Adjacent States, United States Geological Survey

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

The carbonate-rock province of the Great Basin, mainly in eastern Nevada and western Utah, is characterized by thick sequences of carbonate rocks of Paleozoic age. These rocks overlie clastic and crystalline rocks of Cambrian and Precambrian age, respectively. Since the carbonate rocks were deposited, structural compression and extension, intrusive and volcanic episodes, and erosion have greatly modified their distribution and thickness, and a variety of younger rocks and deposits have been emplaced within and above them. The most notable present-day physiographic features in the area are associated with normal faults caused by tensional forces during Tertiary time: The faulting has …

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Diamond Mountain Resource Area Resource Management Plan And Environmental Impact Statement, United States Bureau Of Land Management Jan 1993

Diamond Mountain Resource Area Resource Management Plan And Environmental Impact Statement, United States Bureau Of Land Management

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

This proposed resource management plan and final environmental impact statement addresses management of all resources on approximately 709,000 acres of public land administered by the Bureau of Land Management, Diamond Mountain Resource Area, Vernal District, in Daggett, Duchesne, and portions of Uintah Counties, in northeastern Utah.

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Rangeland Monitoring: Analysis, Interpretation, And Evaluation, United States Bureau Of Land Management Jan 1993

Rangeland Monitoring: Analysis, Interpretation, And Evaluation, United States Bureau Of Land Management

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

The collection of monitoring data results in quantitative and qualitative information obtained from measurements or estimates of the natural resources. These data are most valuable when their meaning is defined and presented in understandable terms to the resource manager. This is the analysis, interpretation, and evaluation process. The result is the documentation of conclusions on the progress of management to accomplish specific management objectives. Such conclusions are used for management and planning purposes, and in particular, for determining managment actions and establishing new or revised management objectives.

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Archeological Investigations At Two Sites In Dinosaur National Monument: 42un1724 And 5mf2645, United States Department Of The Interior National Park Service Jan 1993

Archeological Investigations At Two Sites In Dinosaur National Monument: 42un1724 And 5mf2645, United States Department Of The Interior National Park Service

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

Archeological excavations in Dinosaur National Monument (DINO) were conducted at 5MF2645 (the Pool Creek Site) in 1988 and 42UN1724 (Juniper Ledge Shelter) in 1989. The information from these two sites, along with additional archeological data obtained between 1988 and 1992, have expanded our knowledge of the past 3700 years of human occupation in the DINO area. Juniper Ledge Shelter (42UN1724) is a south-southeast facing rockshelter in the Jones Hole Ely Creek area of the monument. Excavation of a two meter square unit produced evidence of three occupational components and a Fremont burial of an adult female with associated artifacts. The …

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Overview Of The Proposed Critical Habitat For The Colorado River Endangered Fishes, United States Department Of The Interior Fish And Wildlife Service Jan 1993

Overview Of The Proposed Critical Habitat For The Colorado River Endangered Fishes, United States Department Of The Interior Fish And Wildlife Service

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

This document presents an overview of the process, procedures and determinations associated with the proposed critical habitat designation for the razorback sucker, Colorado squawfish, humpback chub, and bonytail (also known as bonytail chub). These species are listed as endangered under the Endangered Species Act (Act) of 1973, as amended (16 U.S.C. 1531 et seq.). Part I is an overview of the proposed critical habitat designation for the Colorado River endangered fishes. Part II is a summary of the biological information used in determining areas for proposed designation and the description of each area proposed on January 29, 1993 (58 FR …

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Operation Of Glen Canyon Dam, Draft Environmental Impact Statement, United States Department Of The Interior Jan 1993

Operation Of Glen Canyon Dam, Draft Environmental Impact Statement, United States Department Of The Interior

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

This draft environmental impact statement (EIS) analyzes the impacts of operations from 1963 to 1990 (baseline conditions) and alternative operations of Glen Canyon Dam on downstream environmental and cultural resources of Glen and Grand Canyons. Alternative operations evaluated include three that would provide steady flows; three that would provide various levels of fluctuating flows; and two, including no action, that would provide unrestricted fluctuating flows. Additional measures have been combined with the alternative operations, where appropriate, to provide additional resource protection or enhancement. The preferred alternative is the Modified Low Fluctuating Flow Alternative.

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Some Economic Impacts Of The 1988 Fires In The Yellowstone Area, U.S. Forest Service Jan 1993

Some Economic Impacts Of The 1988 Fires In The Yellowstone Area, U.S. Forest Service

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

Revenues from tourism and loss of tourist expenditures were investigated

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Probability Of Fire-Stopping Precipitation Events, U.S. Forest Service Jan 1993

Probability Of Fire-Stopping Precipitation Events, U.S. Forest Service

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

The possibility that a useful probability for fire stopping precipitation could be developed from historical weather records was investigated.

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Archeological Investigations At Two Sites In Dinosaur National Monument: 42un1724 And 5mf2645, James A. Truesdale, National Park Service Jan 1993

Archeological Investigations At Two Sites In Dinosaur National Monument: 42un1724 And 5mf2645, James A. Truesdale, National Park Service

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

Archeological excavations in Dinosaur National Monument (DINO) were conducted at 5MF2645 (the Pool Creek Site) in 1988 and 42UN1724 (Juniper Ledge Shelter) in 1989. The information from these two sites, along with archeological data obtained between 1988 and 1992, have expanded our knowledge of the past 3700 years of human occupation in the DINO area. Juniper Ledge Shelter is a south-southeast facing rockshelter in the Jones Hole Ely Creek area of the monument. Excavation of a two meter square unit produced evidence of three occupational components and a Fremont burial of an adult female with associated artifacts. The upper two …

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Snapshot In Time, Repeat Photography On The Boise National Forest 1870-1992, United States Department Of Agriculture Jan 1993

Snapshot In Time, Repeat Photography On The Boise National Forest 1870-1992, United States Department Of Agriculture

Forestry

A forest health crisis of unprecedented proportions faced the Boise National Forest in the early years of the 1990's. Six years of drought set the stage for catastrophic outbreaks of insect and disease in the various tree communities of the forest, and wildfires burned hotter and more frequently than at any time in the past. In our often desperate search for ways to moderate the crisis, we turned to the notion of repeat photography to try to understand what happened in the past and how things are different now. We hoped to find some clues that would help shape management …

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Gravitational Observables And Local Symmetries, Charles G. Torre Jan 1993

Gravitational Observables And Local Symmetries, Charles G. Torre

All Physics Faculty Publications

Using a recent classification of local symmetries of the vacuum Einstein equations, it is shown that there can be no observables for the vacuum gravitational field (in a closed universe) built as spatial integrals of local functions of Cauchy data and their derivatives.

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Symmetries Of The Einstein Equations, Charles G. Torre, Ian M. Anderson Jan 1993

Symmetries Of The Einstein Equations, Charles G. Torre, Ian M. Anderson

All Physics Faculty Publications

We classify all generalized symmetries of the vacuum Einstein equations in four spacetime dimensions. They consist of constant scalings of the metric, and of the infinitesimal action of generalized spacetime diffeomorphisms. Our results rule out a large class of possible ‘‘observables’’ for the gravitational field, and suggest that the vacuum Einstein equations are not integrable.

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Electron Probe X-Ray Microanalysis Applied To Thin Surface Films And Stratified Specimens, J. L. Pouchou, F. Pichoir Jan 1993

Electron Probe X-Ray Microanalysis Applied To Thin Surface Films And Stratified Specimens, J. L. Pouchou, F. Pichoir

Scanning Microscopy

The basic principles of X-ray microanalysis of thin surface films and stratified targets are summarized. The influence of the electron beam accelerating voltage on the analyzed depth is discussed. It is shown that in the field of soft X-rays, the effective depth of analysis is most often limited by the absorption of the radiation in the specimen itself. For high energy radiations, the importance of the secondary emission due to fluorescence excited by the continuous radiation and by the characteristic lines is outlined. The main concepts of the recent ø(ρz) models used for quantitation in the recent software packages are …

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Technology: Its Influence In The Secondary School Upon Achievement In Academic Subjects And Upon Students' Attitude Toward Technology, Dan L. Householder, Barbara Bolin Jan 1993

Technology: Its Influence In The Secondary School Upon Achievement In Academic Subjects And Upon Students' Attitude Toward Technology, Dan L. Householder, Barbara Bolin

Engineering Education Faculty Publications

Many programs in the United States have undertaken to show the benefits to students of integrating academic disciplines. The TEC-Lab project, however, is unique among them because of its innovative approach. First, the TEC-Lab students are in senior high school, grades 9 to 12, while most innovative efforts are concentrated at the elementary and middle school levels. Second, the TEC-Lab approach uses technology as a means of meeting the usual academic requirements, rather than attempting to integrate the other academic areas into technology. The difference between these two approaches is subtle but profound. The first semester of the project was …

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