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Articles 47221 - 47250 of 57323
Full-Text Articles in Entire DC Network
The Utah Statesman, January 25, 1984, Utah State University
The Utah Statesman, January 25, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 23, 1984, Utah State University
The Utah Statesman, January 23, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 20, 1984, Utah State University
The Utah Statesman, January 20, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 18, 1984, Utah State University
The Utah Statesman, January 18, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 16, 1984, Utah State University
The Utah Statesman, January 16, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 13, 1984, Utah State University
The Utah Statesman, January 13, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 11, 1984, Utah State University
The Utah Statesman, January 11, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 9, 1984, Utah State University
The Utah Statesman, January 9, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 6, 1984, Utah State University
The Utah Statesman, January 6, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 4, 1984, Utah State University
The Utah Statesman, January 4, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
The Utah Statesman, January 2, 1984, Utah State University
The Utah Statesman, January 2, 1984, Utah State University
The Utah Statesman
Weekly student newspaper of Utah State University in Logan.
Interactive Image Processing For Electron Microscopy: Matching Hardware With Software, W. O. Saxton
Interactive Image Processing For Electron Microscopy: Matching Hardware With Software, W. O. Saxton
Scanning Electron Microscopy
The image processing techniques used 'a posteriori' to extract information from electron micrographs are surveyed, including particularly image averaging, selective averaging, 3-D reconstruction, and high resolution focal series restoration; recent developments in online image pick up and control have led to fully automatic focussing, stigmating and alignment by a frame store system equipped with a real time correlator board. The diversity of the techniques encountered calls for large integrated program systems with flexible command languages; however, a dilemma exists between providing the user with convenient control of special hardware facilities such as frame stores and array processors, and preventing the …
Socioeconomic Data Base Report For The Paradox Basin, Utah, Bechtel National, Inc.
Socioeconomic Data Base Report For The Paradox Basin, Utah, Bechtel National, Inc.
Elusive Documents
No abstract provided.
Optics Of Wide Electron Beam Focusing, Zhou Li-Wei
Optics Of Wide Electron Beam Focusing, Zhou Li-Wei
Scanning Electron Microscopy
In the present paper, we have further studied an approach to the theoretical treatment of wide electron beam focusing, based on the application of the theory of focusing fields with arbitrary curved optical axis, considering the initial condition emitted from the cathode surface. It is assumed that the magnetic field vector B will be used instead of the magnetic scalar potential Ω and the electrostatic potential 𝞅 and the magnetic field vector B are known functions either by computation or experimentally in the laboratory system of coordinates. The new approach to the mathematical treatment appears to be a useful method …
The Application Of The Alternating Procedure Of H.A. Schwarz For Computing Three-Dimensional Electrostatic Fields In Electron-Optical Systems, Christoph H. Schaefer
The Application Of The Alternating Procedure Of H.A. Schwarz For Computing Three-Dimensional Electrostatic Fields In Electron-Optical Systems, Christoph H. Schaefer
Scanning Electron Microscopy
The numerical solution of three-dimensional electrostatic field problems in electron-optical devices with complicated boundaries requires the use of very large and fast computers. A numerical counterpart of the Alternating Procedure by H. A. Schwarz (SAP) makes efficient use of both storage space and time available on the computer and therefore represents a useful new method in this context. In this method. the domain of solution is decomposed into independent subdomains where the appropriate individual methods of solution may be chosen. Correspondingly. the original boundary value problem is decomposed into a sequence of boundary value problems in these subdomains. SAP requires …
Constrained Optimization Design Of An Electron Optical System, Chang-Xin Gu, Li-Ying Shan
Constrained Optimization Design Of An Electron Optical System, Chang-Xin Gu, Li-Ying Shan
Scanning Electron Microscopy
An electron optical system can be optimized using the "simplex method" or "complex method". By these methods, the final structure of an electron optical system, for example, an extended field lens (EFL), can be searched with a criterion of minimum objective parameter (in the present case, the coefficient of spherical aberration). Because there is no constraint in the simplex method, the constrained optimization method (the complex method) described in this paper is better than the simplex method in the design of electron optical systems. In the simplex method as well as the complex method, it is not necessary to know …
Study Of Space Charge Limitation Of Thermionic Cathodes In Triode Guns, A. Delâge, P. B. Sewell
Study Of Space Charge Limitation Of Thermionic Cathodes In Triode Guns, A. Delâge, P. B. Sewell
Scanning Electron Microscopy
A computer program has been developed to compute the emission of cathodes from the fully space charge limited diode equation. The emission of four different gun arrangements with thermionic cathodes of the type used in electron microscopes is investigated. Microflat cathodes with a small (≤50𝜇m in diameter) fixed emitting area show several advantages for high brightness possibilities whereas other types of cathodes for which the emitting area increases with the brightness are usually limited by too great a total emission.
Central Utah Project, Bonneville Unit: Diamond Fork Power System: Final Environmental Impact Statement, Forest Service; Western Area Power Administration; United States
Central Utah Project, Bonneville Unit: Diamond Fork Power System: Final Environmental Impact Statement, Forest Service; Western Area Power Administration; United States
Elusive Documents
No abstract provided.
Mithras: A Brief Description, O De La Beaujardiere, Vincent B. Wickwar, M J. Baron, J Holt, R M. Wand, W L. Oliver, P Bauer, M Blanc, C Senior, D Alcayde, G Caudal, J Foster, E Nielsen, R Heelis
Mithras: A Brief Description, O De La Beaujardiere, Vincent B. Wickwar, M J. Baron, J Holt, R M. Wand, W L. Oliver, P Bauer, M Blanc, C Senior, D Alcayde, G Caudal, J Foster, E Nielsen, R Heelis
All Physics Faculty Publications
Between May 1981 and June 1982 an intensive campaign of 33 coordinated observations was carried out using the three incoherent-scatter radars capable of probing the auroral zone. During this period the groups operating the Dynamic Explorer satellites and the STARE radar made special efforts to acquire data coincident with the radar observations. The objective of these MITHRAS experiments and subsequent analysis is to further our understanding of the interactions of the magnetosphere, the ionosphere, and the thermosphere, with special emphasis on local time/universal time variations. Three experimental modes with different time resolution and spatial coverage were used to examine different …
Nighttime Thermospheric Winds Over Sondre Stromfjord, Greenland, J W. Meriwether Jr., P Shih, T L. Killeen, Vincent B. Wickwar, R G. Roble
Nighttime Thermospheric Winds Over Sondre Stromfjord, Greenland, J W. Meriwether Jr., P Shih, T L. Killeen, Vincent B. Wickwar, R G. Roble
All Physics Faculty Publications
Observations of nighttime thermospheric neutral winds made at Sondre Stromfjord, Greenland, with optical and radar instrumentation, showed an occasional abatement in the equatorward meridional wind at a magnetic local time corresponding to the nighttime division between the evening and morning convection cells. This abatement appeared primarily in the poleward observations. In contrast, however, the characteristic midnight “surge” was usually seen in the equatorward set of observations. The apparent acceleration of about 250 m/s or greater within 4.6° latitude we attribute, in part, to a merging of neutral jet streams generated by polar cap ion drag adjacent to the auroral zone …
Thermionic Emission Studies Of Micro-Flat Single Crystal Lanthanum Hexaboride Cathodes, P. B. Sewell, A. Delâge
Thermionic Emission Studies Of Micro-Flat Single Crystal Lanthanum Hexaboride Cathodes, P. B. Sewell, A. Delâge
Scanning Electron Microscopy
A new type of high brightness thermionic cathode has been developed. The cathode utilises emission from a small flat surface (generally less than 50 μm diameter) prepared parallel to a specific crystal plane on a single crystal of Lanthanum Hexaboride. Emission from the rest of the single crystal is suppressed by the use of a high work function coating of pyrolytic graphite. When used in a conventional triode gun, the maximum total electron emission is controlled by the area of the micro-flat, the work function and the temperature of the emitter. The Wehnelt potential serves a minor role in controlling …
Microchannel Plates As Specialized Scanning Electron Microscopy Detectors, P. E. Russell
Microchannel Plates As Specialized Scanning Electron Microscopy Detectors, P. E. Russell
Scanning Electron Microscopy
The need for a specialized detector for low beam voltage and low beam current applications has led to the investigation of a microchannel plate detector for SEM. The application requirements are described in detail, with the case of integrated circuit metrology used as an example. The microchannel plate (MCP) detector has proven to meet almost all of the design objectives of a low voltage metrology SEM detector. The symmetry of the detector and the ability to mount it directly to the final pole piece are among the most important features.
Coniferous Forest Habitat Types Of Northern Utah, Ronald L. Mauk, Jan A. Henderson
Coniferous Forest Habitat Types Of Northern Utah, Ronald L. Mauk, Jan A. Henderson
The Bark Beetles, Fuels, and Fire Bibliography
Data from >1100 plots in coniferous forests of northern Utah and adjacent areas of Idaho and Wyoming were used to identify 8 climax series and 36 habitat types. Descriptions are given of each type with notes on potential productivity for timber and characteristics of site, climate and surface soil.
Ten Utah Painters, Andrew Whitlock
Ten Utah Painters, Andrew Whitlock
Exhibit Catalogues
Today the art world is rich and diverse with regional as well as national art centers. As in the past, art is alive and well in Utah. The show Ten Utah Painters invites us to see and experiece what some of Utah's best contemporary artists are doing. Their paintings invite us to look and to enjoy but also to learn and open up our visual senses to a broader vista.
Ten Utah Painters, Tom Toone, Andrew M. Whitlock
Ten Utah Painters, Tom Toone, Andrew M. Whitlock
Exhibit Catalogues
No abstract provided.
Flood Insurance Study, City Of Logan, Utah, Cache County, Federal Emergency Management Agency
Flood Insurance Study, City Of Logan, Utah, Cache County, Federal Emergency Management Agency
All U.S. Government Documents (Utah Regional Depository)
This Flood Insurance Study investigates the existence and severity of flood hazards in the City of Logan, Cache County, Utah, and aids in the administration of the National Flood Insurance act of 1968 and the Flood Disaster Protection Act of 1973. This study will be used to convert Logan to the regular program of flood insurance by the Federal Emergency Management Agency (FEMA). Local and regional planners will use this study in their efforts to promote sound flood plain management.
Prehistory Of Long Valley, Idaho, United States Department Of Agriculture, Forest Service
Prehistory Of Long Valley, Idaho, United States Department Of Agriculture, Forest Service
Archaeology/Anthropology
This thesis deals with a group of artifact collections gathered by local amateurs from a series of sites along the western shoreline of Cascade Reservoir. This study uses these artifacts as a basis to put together a preliminary view of Long Valley prehistory. Outlines of the basic artifact types are formulated and placed into a chronology based upon typological comparisons and obsidian hydration. Previous archaeological work, the ethnohistory, and local geology of the valley are discussed and related ot the sites, used in this study, in order to determine their patterns and characteristics. From these efforts directions for further research …
Log Cabin Studies: The Rocky Mountain Cabin, Log Cabin Technology And Typology, Log Cabin Bibliography, United States Department Of Agriculture, Forest Service
Log Cabin Studies: The Rocky Mountain Cabin, Log Cabin Technology And Typology, Log Cabin Bibliography, United States Department Of Agriculture, Forest Service
Forestry
While conducting fieldwork in southern Idaho during the summer of 1980, I came upon numerous examples of a type of cabin not previously documented. This report attempts to determine how this type fits with other known cabin types, and to find its place in present theories about American vernacular architecture. By making use of extant reports, historical photos, and archeological site forms, it is apparent this cabin type can be found throughout the Rocky Mountain region. Along with other Western studies, this report attempts to show that vernacular construction patterns in the Western United States differ from those present in …
Field Tests Of Elk/Timber Coordination Guidelines, United States Department Of Agriculture, Forest Service
Field Tests Of Elk/Timber Coordination Guidelines, United States Department Of Agriculture, Forest Service
Forestry
During the summers of 1980 and 1981, field validation tests were conducted in 11 different areas in Montana and northern Idaho. The objectives of this research were (1) to evaluate several common methods of determining cover/forage ratios, (2) to evaluate several different road-influence models, and (3) to determine the combination of cover/forage function and road model that best describes actual elk selection among different available habitats.