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1996

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Articles 1951 - 1980 of 2437

Full-Text Articles in Physical Sciences and Mathematics

Multiple Polar Cap Arcs: Akebono (Exos D) Observations, T. Obara, T. Mukai, H. Hayakawa, K. Tsurda, A. Matsuoka, A. Nishida, H. Fukunishi, L. Zhu, Jan Josef Sojka, D. J. Crain Jan 1996

Multiple Polar Cap Arcs: Akebono (Exos D) Observations, T. Obara, T. Mukai, H. Hayakawa, K. Tsurda, A. Matsuoka, A. Nishida, H. Fukunishi, L. Zhu, Jan Josef Sojka, D. J. Crain

All Physics Faculty Publications

Akebono (Exos D) observations demonstrate that polar cap arcs sometimes have a fine structure, that is, multiple (double or triple) arcs with spacing of a few tens of kilometers. The multiple polar cap arcs are dominantly observed in the nightside polar cap region, suggesting that low background conductance favors the appearance of the structured arcs. A relationship between the spacing and the average energy of the precipitating electrons is investigated. Results show that a higher energy leads to a wider spacing. Akebono observations also show the existence of a downward current region embedded between upward current regions (arcs). Comparison of …

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Model-Observation Comparison Study Of Multiple Polar Cap Arcs, Lie Zhu, Cesar E. Valladares, Jan Josef Sojka, Robert W. Schunk, D. J. Crain Jan 1996

Model-Observation Comparison Study Of Multiple Polar Cap Arcs, Lie Zhu, Cesar E. Valladares, Jan Josef Sojka, Robert W. Schunk, D. J. Crain

All Physics Faculty Publications

A quantitative model-observation comparison of multiple polar cap arcs has been conducted by using a time-dependent theoretical model of polar cap arcs. In particular, the electrodynamical features of multiple polar cap arcs with various spacings are simulated and the results are compared with the images obtained from the All-Sky Intensified Photometer at Qaanaaq. The results show that the observed and simulated arcs are quite similar, both spatially and temporally. The results support the theory proposed by Zhu et al. [1993a, 1994b] that the structure of polar cap arcs is mainly determined by the magnetosphere-ionosphere (M-I) coupling processes and that …

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Resonance Lidar To Study Temperatures, Winds, And Metal Densities In The Upper Mesosphere And Lower Thermosphere, Vincent B. Wickwar, T D. Wilkerson, D Rees, S C. Collins Jan 1996

Resonance Lidar To Study Temperatures, Winds, And Metal Densities In The Upper Mesosphere And Lower Thermosphere, Vincent B. Wickwar, T D. Wilkerson, D Rees, S C. Collins

All Physics Faculty Publications

None available.

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Environmental Assessment Mammoth-Duck Creek Recovery Project, United States Forest Service Jan 1996

Environmental Assessment Mammoth-Duck Creek Recovery Project, United States Forest Service

Environmental Assessments (UT)

This Environmental Assessment (EA) documents the analysis of a Proposed Action and the No Action alternative for the Mammoth-Duck Creek Recovery Project. The Proposed Action is designed to meet the following Purpose and Need within urban interface areas, Forest campgrounds and along designated Forest roads (Focus Areas): restore forest health by reducing bark beetle populations and protecting and retaining scenic vegetation; eliminate safety hazards by reducing fuels buildup and fire danger; manage habitats to maintain viable populations of existing native or desired non-native vertebrate species; and recover the volume and value of trees killed by bark beetles. The EA discusses …

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Internal Time Formalism For Spacetimes With Two Killing Vectors, Joseph D. Romano, Charles G. Torre Jan 1996

Internal Time Formalism For Spacetimes With Two Killing Vectors, Joseph D. Romano, Charles G. Torre

All Physics Faculty Publications

The Hamiltonian structure of spacetimes with two commuting Killing vector fields is analyzed for the purpose of addressing the various problems of time that arise in canonical gravity. Two specific models are considered: (i) cylindrically symmetric spacetimes, and (ii) toroidally symmetric spacetimes, which respectively involve open and closed universe boundary conditions. For each model canonical variables which can be used to identify points of space and instants of time, {\it i.e.}, internally defined spacetime coordinates, are identified. To do this it is necessary to extend the usual ADM phase space by a finite number of degrees of freedom. Canonical transformations …

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Scale-Invariant Phase Space And The Conformal Group, James Thomas Wheeler Jan 1996

Scale-Invariant Phase Space And The Conformal Group, James Thomas Wheeler

All Physics Faculty Publications

The gauge bundle of the 4-dim conformal group over an 8-dim base space, called biconformal space, is shown have a consistent interpretation as a scale-invariant phase space. Specifically, we show that a classical Hamiltonian system generates a differential geometry which is necessarily biconformal, and that the classical Hamiltonian dynamics of a point particle is equivalent to the specification of a 7-dim hypersurface in flat biconformal space together with the consequent necessary existence of a set of preferred curves. The result is centrally important for establishing the physical interpretation of conformal gauging.

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Relationship Of Theoretical Patch Climatology To Polar Cap Patch Observations, M. D. Bowline, Jan Josef Sojka, Robert W. Schunk Jan 1996

Relationship Of Theoretical Patch Climatology To Polar Cap Patch Observations, M. D. Bowline, Jan Josef Sojka, Robert W. Schunk

All Physics Faculty Publications

During a southward orientation of the interplanetary magnetic field (IMF), patches are often observed moving antisunward across the polar cap. In saying “patches” we refer to structures in which the F region electron densities are enhanced relative to lower background levels; we do not in this paper consider patches which are observed optically (see J. J. Sojka et al., Ambiguity in identificiation of polar cap F region patches, submitted to the Journal of Atmospheric and Terrestrial Physics, 1995). The patches can be modeled by a process which involves the “chopping up” of the tongue of ionization (TOI) [Sojka …

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Raman Spectroscopy Of Carbon Materials, Jr Dennison, Mark Holtz, Greg Swain Jan 1996

Raman Spectroscopy Of Carbon Materials, Jr Dennison, Mark Holtz, Greg Swain

Journal Articles

Use of carbon materials is no longer limited to diamond jewelry or graphite pencils and lubricants. The last decade has witnessed an explosion of technological applications driven by the development of fabrication methods and the discovery of several new classes of pure carbon. Structural diversity exhibited by the carbon atoms, from local chemical order to long-range crystalline order, is key to understanding their physical and chemical properties and in future materials development. This article summarizes the use of Raman spectroscopy as a principal tool to investigate the vibrational dynamics of carbon materials and to provide indirect structural characterization of their …

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Application Of (E,2e) Spectroscopy To The Electronic Structure Of Valence Electrons In Crystalline And Amorphous Solids, Jr Dennison, A. L. Ritter Jan 1996

Application Of (E,2e) Spectroscopy To The Electronic Structure Of Valence Electrons In Crystalline And Amorphous Solids, Jr Dennison, A. L. Ritter

Journal Articles

This review presents theoretical and experimental aspects of (e,2e) spectroscopy specific to the study of crystalline and amorphous solids. The cross section for (e,2e) scattering is proportional to the spectral momentum density of the ejected electron under certain approximations. The theoretical framework for interpreting (e,2e) measurements is summarized here and general properties of the spectral momentum density of solids are discussed. Different designs of the (e,2e) spectrometer are described and sample preparation techniques are briefly reviewed. A summary of recent (e,2e) experiments on the electronic structure of valence electrons in graphite, ion sputtered and evaporated amorphous carbon, and aluminum-aluminum oxide …

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Fire-Bgc -- A Mechanistic Ecological Process Model For Simulating Fire Succession On Coniferous Forest Landscapes Of The Northern Rocky Mountains, United States Department Of Agriculture, Forest Service Jan 1996

Fire-Bgc -- A Mechanistic Ecological Process Model For Simulating Fire Succession On Coniferous Forest Landscapes Of The Northern Rocky Mountains, United States Department Of Agriculture, Forest Service

Forestry

An ecological process model of vegetation dynamics mechanistically simulates long-term stand dynamics on coniferous landscapes of the Northern Rocky Mountains. This model is used to investigate and evaluate cumulative effects of various fire regimes, including prescribed burning and fire exclusion, on the vegetation and fuel complex of a simulation landscape composed of many stands. Detailed documentation of the model FIRE-BGC (a FIRE BioGeoChemical succession model) with complete discussion of all model parameters is followed with results of an application of the FIRE-BGC to a whitebark pine landscape in the Bob Marshall Wilderness complex. Simulation results of several management scenarios are …

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County, Colorado, Prowers County, Colorado Watershed Plan And Environmental Assessment, Bent Soil Conservation District, Natural Resources Conservation Service Jan 1996

County, Colorado, Prowers County, Colorado Watershed Plan And Environmental Assessment, Bent Soil Conservation District, Natural Resources Conservation Service

Environmental Assessments (NV)

No abstract provided.

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Geologic Map Of The Logan Quadrangle, Cache County, Utah, James P. Evans, James P. Mccalpin, David C. Holmes Jan 1996

Geologic Map Of The Logan Quadrangle, Cache County, Utah, James P. Evans, James P. Mccalpin, David C. Holmes

Geosciences Faculty Publications

No abstract provided.

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Flood Insurance Study, City Of Farmington, Utah, Davis County, Federal Emergency Management Agency Jan 1996

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

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

This Flood Insurance Study report revises and updates a previous Flood Insurance Study/Flood Insurance Rate Map for the City of Farmington, Davis County, Utah. This information will be used by the City of Farmington 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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Environmental Assessment For 36 Livestock Grazing Allotments On The Shoshone National Forest, United States Forest Service Jan 1996

Environmental Assessment For 36 Livestock Grazing Allotments On The Shoshone National Forest, United States Forest Service

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

The Shoshone National Forest proposes to issue Term Grazing Permits that will authorize the grazing of livestock on 36 grazing allotments located within the Forest. Permits will be issued for a period of up to 10 years. Part 3 (Special Terms and Conditions) of each permit would contain site specific livestock and rangeland management requirements designed to mitigate existing resource conflicts and implement Forest Plan standards and guidelines specific to each allotment.

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South Manti Timber Salvage Sales Environmental Assessment, United States Forest Service Jan 1996

South Manti Timber Salvage Sales Environmental Assessment, United States Forest Service

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

This environmental assessment (EA) is intended to foster informed decision making and public participation on a site-specific proposal to implement activities designed to meet the purpose and need and goals and objectives of the Manti-La Sal National Forest Land and Resources Management Plan (Forest Plan). This EA discloses the direct, indirect, and cumulative environmental impacts of three action alternatives for timber harvest and road construction, and a no action alternative on portions of the Ferron/Price and Sanpete Ranger Districts, Manti-La Sal National Forest in Sanpete and Sevier Counties, Utah. The area to be analyzed in support of this decision includes …

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Basic Astronomy Labs, Terry L. Smith, Michael D. Reynolds, Jay S. Huebner Jan 1996

Basic Astronomy Labs, Terry L. Smith, Michael D. Reynolds, Jay S. Huebner

Physics Faculty Research and Scholarship

Providing the tools and know-how to apply the principles of astronomy first-hand, these 43 laboratory exercises each contain an introduction that clearly shows budding astronomers why the particular topic of that lab is of interest and relevant to astronomy. About one-third of the exercises are devoted solely to observation, and no mathematics is required beyond simple high school algebra and trigonometry.Organizes exercises into six major topics—sky, optics and spectroscopy, celestial mechanics, solar system, stellar properties, and exploration and other topics—providing clear outlines of what is involved in the exercise, its purpose, and what procedures and apparatus are to be used. …

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Enron Burly Development Well No. 58-18d Finding Of No Significant Impact And Decision Record, United States Department Of The Interior Bureau Of Land Management Jan 1996

Enron Burly Development Well No. 58-18d Finding Of No Significant Impact And Decision Record, United States Department Of The Interior Bureau Of Land Management

Record of Decisions (WY)

The proposed well, Burly 58-18D, is located on private surface on a steep slope above fogarty Creek and within view of identified crucial elk winter range. The Burly project is located west of Mobil's office on the Calpet Highway between Big Piney and LaBarge, Wyoming.

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Express Crude Oil Pipeline Record Of Decision, United States Department Of The Interior Bureau Of Land Management Jan 1996

Express Crude Oil Pipeline Record Of Decision, United States Department Of The Interior Bureau Of Land Management

Record of Decisions (WY)

This document records the decision made by the Bureau of Land Management (BLM) for granting a right-of-way (ROW) across BLM-administered lands (public lands) to Express Pipeline, Inc. for the construction of a 24-inch crude oil pipeline from Wildhorse, Alberta, Canada to Casper, Wyoming.

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Decision Record And Finding Of No Significant Impact For Sodium Leasing In The Green River Basin Of Southwestern Wyoming, United States Department Of The Interior Bureau Of Land Management Jan 1996

Decision Record And Finding Of No Significant Impact For Sodium Leasing In The Green River Basin Of Southwestern Wyoming, United States Department Of The Interior Bureau Of Land Management

Record of Decisions (WY)

The BLM is charged with leasing federal mineral resources. BLM is proposing to hold a sodium lease sale of seven tracts incorporating a total of 9,893.91 acres as shown on Map 1. Federal sodium leases are issued based upon a system of closed competitive bids. The highest bidder may receive the lease provided the bid meets or exceeds fair market value. Leases have a 20-year primary term with discretionary 10-year renewal periods thereafter. A federal sodium lease is not automatically renewed but may be renewed upon the lessee's timely request for renewal. All leases adjudicated for renewal are reviewed and …

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Final Environmental Impact Statement Expanded Moxa Arch Area Natural Gas Development Project, Sweetwater, Lincoln, And Uinta Counties, Wyoming, United States Department Of The Interior Bureau Of Land Management Jan 1996

Final Environmental Impact Statement Expanded Moxa Arch Area Natural Gas Development Project, Sweetwater, Lincoln, And Uinta Counties, Wyoming, United States Department Of The Interior Bureau Of Land Management

Final Environmental Impact Statements (WY)

The Expanded Moxa Arch Area Natural Gas Development Project EIS analyzes a proposal by the Moxa Arch operators (Amoco Production Company, Union Pacific Resources Company, Wexpro/Celsius Energy Company, Bannon Energy, Marathon Oil Company, Presidio Exploration, and other companies) to continue to infill drill additional development wells in their leased acreage within the Moxa Arch oil and gas development area. The project area encompasses approximately 476,261 acres of southwestern Wyoming. Lands associated with the additional drilling program include those previously analyzed in the Amoco Production Company Moxa Arch Natural Gas Production Environmental Assessment (EA) and Decision Record (DR) (USDI-BLM 1991) and …

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Express Crude Oil Pipeline Final Environmental Impact Statement, United States Department Of The Interior Bureau Of Land Management Jan 1996

Express Crude Oil Pipeline Final Environmental Impact Statement, United States Department Of The Interior Bureau Of Land Management

Final Environmental Impact Statements (WY)

Express Pipeline, Inc. (Express) proposes to construct, maintain, and operate a 24-inch crude oil pipeline from the U.S. (Montana)/Canada border near Wild Horse to Casper, Wyoming. The project (the proposed action ) would include the 515-mile pipeline, five pump stations, numerous mainline block and check valves, and a meter station. Initially, the pipeline would be capable of transporting 172,000 barrels per day of Canadian crude oil to Casper, Wyoming. Construction is scheduled from July through October, 1996, with operations beginning by late October, 1996. This final environmental impact statement analyzes the environmental effects of the Express Pipeline, the No Action …

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Final Environmental Impact Statement, Grass Creek Planning Area Resource Management Plan, Volume 2 Of 2, United States Department Of The Interior Bureau Of Land Management Jan 1996

Final Environmental Impact Statement, Grass Creek Planning Area Resource Management Plan, Volume 2 Of 2, United States Department Of The Interior Bureau Of Land Management

Final Environmental Impact Statements (WY)

The Bureau of Land Management is responsible for the balanced management of the public lands and resources and their various values so that they are considered in a combinatlon that will best serve the needs of the American people. Management is based upon the principles of multiple use and sustained yield: a combination of uses that take into account the long term needs of future generations for renewable and nonrenewable resources. These resources include recreation, range, timber, minerals, watershed, fish and wildlife, wilderness and natural, scenic, scientific and cultural values.

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Final Environmental Impact Statement, Grass Creek Planning Area Resource Management Plan, Volume 1 Of 2, United States Department Of The Interior Bureau Of Land Management Jan 1996

Final Environmental Impact Statement, Grass Creek Planning Area Resource Management Plan, Volume 1 Of 2, United States Department Of The Interior Bureau Of Land Management

Final Environmental Impact Statements (WY)

This final environmental impact statement (EIS) describes the proposed Grass Creek Resource Management Plan (RMP) and its environmental consequences. This proposed plan is for the future management of public lands in a portion of the Bighorn Basin Resource Area of the Worland District of the Bureau of Land Management (BLM). The planning area comprises approximately 968,000 acres of BLM-administered public land surface and 1,171,000 acres of BLM-administered federal mineral estate. (BLM-administered public land surface is referred to as "public land" in this document.)

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Record Of Decision For Fontenelle Natural Gas Infill Drilling Projects Environmental Impact Statement, Sweetwater And Lincoln Counties, Wyoming, United States Department Of The Interior Bureau Of Land Management Jan 1996

Record Of Decision For Fontenelle Natural Gas Infill Drilling Projects Environmental Impact Statement, Sweetwater And Lincoln Counties, Wyoming, United States Department Of The Interior Bureau Of Land Management

Record of Decisions (WY)

The Bureau of Land Management (BLM) approves the Fontenelle Projects Resource Protection Alternatives (RPAs) for natural gas development and production. Approval of the RPAs provides for managing the area, in accordance with the Federal Land Policy and Management Act (Sec. 202(e)), in a manner that allows for natural gas development while continuing to provide for the existing principal and major uses (i.e., domestic livestock grazing, fish and wildlife development and utilization, mineral exploration and production, rights-of-way, and outdoor recreation) recognized by the land use plan for this area. The RPAs balance the multiple uses and sustains the long-term yield of …

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Fontenelle Natural Gas Infill Drilling Projects, Sweetwater And Lincoln Counties, Wyoming, Final Environmental Impact Statement, United States Department Of The Interior Bureau Of Land Management Jan 1996

Fontenelle Natural Gas Infill Drilling Projects, Sweetwater And Lincoln Counties, Wyoming, Final Environmental Impact Statement, United States Department Of The Interior Bureau Of Land Management

Final Environmental Impact Statements (WY)

DALEN Resources Oil & Gas Co. (DALEN Operator) and Cabot Oil & Gas Corp., Presidio Oil Co., and several other companies (collectively the Lincoln Road Operators) propose to continue infill drilling their existing lease acreage (collectively approximately 179,760 acres) within the Fontenelle II and Lincoln Road development areas. The Fontenelle II and the Lincoln Road development areas are immediately adjacent to each other. Both proposed actions would be implemented in northeastern Lincoln and northwestern Sweetwater counties, Wyoming adjacent to and east of Fontenelle Reservoir and the Green River. The project areas are approximately 30 miles northeast of Kemmerer, Wyoming and …

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Green River Resource Area Resource Management Plan And Final Environmental Impact Statement Volume 1 Of 2, United States Department Of The Interior Bureau Of Land Management Jan 1996

Green River Resource Area Resource Management Plan And Final Environmental Impact Statement Volume 1 Of 2, United States Department Of The Interior Bureau Of Land Management

Resource Management Plans (WY)

This final environmental impact statement (EIS) describes the Proposed Green River Resource Management Plan (RMP) and its environmental consequences. This proposed plan is for the future management of approximately 3,635,000 acres of BLM-administered public land surface and 3,581,000 acres of BLM-administered Federal mineral estate in the Green River Resource Area.

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Green River Resource Area Resource Management Plan And Final Environmental Impact Statement Volume 2 Of 2, United States Department Of The Interior Bureau Of Land Management Jan 1996

Green River Resource Area Resource Management Plan And Final Environmental Impact Statement Volume 2 Of 2, United States Department Of The Interior Bureau Of Land Management

Resource Management Plans (WY)

The Bureau of Land Management is responsible for the balanced management of the public lands and resources and their various values so that they are considered in a combination that will best serve the needs of the American people. Management is based upon the principles of multiple use and sustained yield; a combination of uses that take into account the long term needs of future generations for renewable and nonrenewable resources. These resources include recreation, range, timber, minerals, watershed, fish and wildlife, wilderness and natural, scenic, scientific and cultural values.

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Characterization Of Ground And Excited Electronic State Deprotonation Energies Of Systems Containing Double Bonds Using Natural Bond Orbital Analysis, J. K. Badenhoop, Steve Scheiner Jan 1996

Characterization Of Ground And Excited Electronic State Deprotonation Energies Of Systems Containing Double Bonds Using Natural Bond Orbital Analysis, J. K. Badenhoop, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Natural bond orbital analysis is applied to the ground and excited states of a set of neutral, cationic, and anionic doubly bonded species HnC=XHn (X=C, N, O) isoelectronic with ethylene. The character of the excitation is correlated with calculated charge shifts and geometry changes upon relaxation. For these planar molecules, depopulation of the π bond or population of the π∗ antibond causes an out‐of‐plane twist or pyramidalization upon relaxation correlated to the amount of charge shift. These nonplanar distortions generally lower the energy more than changes in bond lengths and angles. Population of a σXH∗ …

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Translation Of 'Profiles In Faith', Monish Ranjan Chatterjee Jan 1996

Translation Of 'Profiles In Faith', Monish Ranjan Chatterjee

Electrical and Computer Engineering Faculty Publications

Sarat Chandra Chatterjee (1876-1938) may be considered one of the three most significant figures of the literary component of the Bengal Renaissance, the other two being Bankim Chandra Chatterjee (1838-1894) and Rabindranath Tagore (1861-1941). As much as Bankim Chandra is identified with the new age in the Bengali novel, and the development of serious vernacular journalism, and Rabindranath with modern/classical movements in Bengali poetry and music, along with novel ideas in methods of education and teaching, Sarat Chandra, as a novelist and storyteller, perfected the art of narration and critical analyses of a variety of contemporaneous social and political issues, …

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Invariant Subspaces Of The Harmonic Dirichlet Space With Large Co-Dimension, William T. Ross Jan 1996

Invariant Subspaces Of The Harmonic Dirichlet Space With Large Co-Dimension, William T. Ross

Department of Math & Statistics Faculty Publications

In this paper, we comment on the complexity of the invariant subspaces (under the bilateral Dirichlet shift f → ζf) of the harmonic Dirichlet space D. Using the sampling theory of Seip and some work on invariant subspaces of Bergman spaces, we will give examples of invariant subspaces F ⊂ D with dim(F/ζF) = n, n ∈ N ∪ {∞}. We will also generalize this to the Dirichlet classes Dα, 0 <α< ∞, as well as the Besov classes Bα p , 1

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