Digital Commons Network^™

Experimental Evidence For The Acceleration Of Thermal Electrons By Ion Cyclotron Waves In The Magnetosphere, A. J. Norris, J.F. E. Johnson, Jan Josef Sojka, G. L. Wrenn, N. Cornilleau-Wehrlin, S. Perraut, A. Roux

All Physics Faculty Publications

Ion cyclotron waves (ICWs) at frequencies just above f He+ , the helium gyrofrequency, are often observed by the ESA satellites GEOS 1 and GEOS 2. Young et al. (1981) have shown the close connection between these ICWs and the presence of thermal He+ ions in the outer magnetosphere. The purpose of this paper is to provide experimental evidence for the acceleration of thermal electrons by the large amplitude ICWs. The wave power in the ultra low frequency (ULF) range near f He+ is compared with the distribution function of low energy electrons, measured by instruments aboard the GEOS satellites. …

Food Microstructure

Food Structure

No abstract provided.

Fluorescence Quenching At High Quencher Concentrations, David Peak, T C. Werner, R M. Dennin Jr., J K. Baird

All Physics Faculty Publications

Chemical reactions occurring in dense media at high reactant concentrations can be described by rate ‘‘constants’’ which are actually functions of concentration. We present a theoretical model in which this so‐called rate constant ‘‘renormalization’’ occurs for the specific case of fluorescence quenching in solution. We show that both the quenching and the excitation rate constants can become concentration dependent. We fit our theory to several sets of experimental data—our own and some from the literature—and show that excellent agreement is obtained by varying a single free parameter, namely, the efficiency with which a fluorophore‐quencher collision leads to a quench of …

Incoherent Scatter Measurements Of Ion-Neutral Collision Frequencies And Temperatures In The Lower Thermosphere Of The Auroral Region, C. Lathuillere, Vincent B. Wickwar, W. Kofman

All Physics Faculty Publications

Incoherent scatter observations performed in March and November 1978 at Chatanika have been used for studying the lower thermosphere in the auroral region. Neutral temperatures and densities have been found during periods without Joule heating. We present mean profiles of temperatures and collision frequencies (approximately proportional to neutral densities) for each month and profiles obtained during four specific nights. Between 93 km and 110 km the mean profiles of temperature are in good agreement with the Jacchia (1971) model, and the profiles of collision frequency are similar to those deduced from the model. Consistency checks between these collision frequencies and …

Large-Scale Counterstreaming Of H+ And He+ Along Plasmaspheric Flux Tubes, P. G. Richards, Robert W. Schunk, Jan Josef Sojka

All Physics Faculty Publications

An interhemispheric plasma transport model has been used to study the flow characteristics of H+, He+, and O+ along closed geomagnetic field lines for solstice conditions at noon local time. The calculations were carried out for the flux tube that passes through Millstone Hill. Both symmetric and asymmetric neutral winds in the conjugate ionospheres were considered. Initially, the flux tube content was partially depleted, and the subsequent refilling was studied until a steady state flow was established between the winter and summer hemispheres. The main conclusion to be drawn from this study is that H+-He+ counterstreaming can be expected along …

A Theoretical Study Of The High Latitude F Region’S Response To Magnetospheric Storm Inputs, Jan Josef Sojka, Robert W. Schunk

All Physics Faculty Publications

The response of the polar ionosphere to magnetospheric storm inputs was modeled. During the storm the two major processes that couple the F region to the magnetosphere, namely the electric field distribution and the particle precipitation from the magnetosphere, undergo drastic modification on relatively short F region time scales. These time-dependent changes are not simply related to the F region storm time dependent changes. The lower F region responds on a time scale of only minutes to the storm associated changes in the auroral precipitating electron flux, owing to the dominance of chemistry production-loss mechanisms over transport processes. At higher …

Journal Of Mormon History Vol. 10, 1983

Journal of Mormon History

• --Two Integrities: An Address to the Crisis in Mormon Historiography

Martin E. Marty, 3

• --Indulging in Temperance: Prohibition and Political Activism in the RLDS Church

Paul Shupe, 21

• --"Standing between Two Fires" : Mormons and Prohibition, 1908-1917

Brent G. Thompson, 35

• --History and the Mormon Scriptures

William D. Russell, 53

• --The Limits of Learning in Pioneer Utah

Charles S. Peterson, 65

• --Furthering the Cause of Zion: An Overview of the Ecclesiastical Court System in Early Utah R.

Collin Mangrum, 79

NOTES, VIEWS, AND REVIEWS

• --Reflections on the Founding and Purpose of the Mormon History Association

Leonard J. …

Characteristics Of Thermal And Suprathermal Ions Associated With The Dayside Plasma Trough As Measured By The Dynamics Explorer Retarding Ion Mass Spectrometer, Jan Josef Sojka, Robert W. Schunk, J.F. E. Johnson, J. H. Waite, C. R. Chappell

All Physics Faculty Publications

The retarding ion mass spectrometer (RIMS) instrument on Dynamics Explorer 1 has carried out high-altitude measurements of the polar wind. During an outbound pass through the outer plasmasphere and plasma trough at 0900 LT the RIMS instrument measured the detailed characteristics of the thermal and suprathermal ions. Three distinct populations were observed: (1) thermal ions (H⁺ and He⁺) with densities ranging from > 500 ions/cm³ to < 1 ion/cm³, temperatures around 2 eV (20,000° K), and H⁺/He⁺ density ratios of 2 to 4, (2) warm anisotropic plasma with densities ranging from 2 to 12 ions/cm …

Preferential Perpendicular Acceleration Of Heavy Ionospheric Ions By Interactions With Electrostatic Hydrogen Cyclotron Waves, Nagendra Singh, Robert W. Schunk, Jan Josef Sojka

All Physics Faculty Publications

The energization of heavy ionospheric ions by electrostatic hydrogen cyclotron (EHC) waves is examined. In particular, the problem of preferential perpendicular acceleration of heavy ions above 5000 km along auroral field lines is examined critically. Observations have indicated that above this altitude the occurrences of ion beams and EHC waves are highly correlated and that the occurrence rates are high. The EHC waves are found to be coherent. The energization process is examined in the light of interactions of a single coherent wave with the ions. The interactions can be stochastic or nonstochastic, depending on the parameters of the wave …

Successional Trends In An Ungrazed, Arid Grassland Over A Decade, Edgar F. Kleiner

Canyonlands Research Bibliography

A study has been made of the vegetational condition of a formerly grazed area, Chesler Park, in Canyonlands National Park. A comparison was made with the same area 10 years earlier. The 10-year successional changes are also compared to baseline data of 10 years earlier from Virginia Park, an adjacent ungrazed area. Because of inaccessibility and long isolation from disturbances, Virginia Park is presumed to be in climax condition and is the control for this study. Chesler Park shows a successional trend after 10 years toward the vegetational condition of Virginia Park. This is exemplified, with only one major exception …

Development Of Microstructure In Set-Style Nonfat Yogurt - A Review, Miloslav Kalab, Paula Allan-Wojtas, Beverley E. Phipps-Todd

Food Structure

The development of microstructure in natural set-style nonfat yoghurt was stud i ed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In addition to thin-sectioning and conventional SEM described in the literature, this review illustrates gelation of milk with micrographs obtai ned by rotary shadowing of casein micelles and their clusters. The existence of void spaces occupied by lactic acid bacteria in yoghurt was con finned by cold-stage SEM of uncoa ted specimens. The microstructure of yoghurt is affected by the preheat treatment of milk, bacterial starter cultures, total solids content , and the presence of thickening agents. …

Food Microstructure

Food Structure

No abstract provided.

Hydrologic Evaluation Of The Coastal Belt Water Project Sarir And Tazerbo Well Fields, Libya, Edward P. Fisk, Christopher J. Duffy, Calvin G. Clyde, Roland W. Jeppson, Phillip H. Degroot, Bhasker Rao K., Win-Kai Liu

Reports

Executive Summary: The basic purpose of this study was to conduct a finite-element computer model and give an dindependent appraisal of the reliability of the groundwater supply for the proposed Coastal Belt Water Project (CBWP_ Well Fields at Sarir and Tazerbo. There is no doubt that ample quantities of groundwater of acceptable quality occur at the sites selected for these well fields for the estimated 50-year life of the project and longer. Of major concern is the predicted drawdown of wells and total pumping lifts throughout the 50-year period. Excessive drawdowns could cause operating costs to become prohibitibely expensive. Average …

Bioassays- Procedures And Results, A. F. Maciorowski, L. W. Little, L. F. Raynor, Ronald C. Sims, J. L. Sims

Biological Engineering Faculty Publications

Bioassay procedures to describe, evaluate, and predict the potential hazard of toxic materials to organisms and ecosystems, and the health-related aspects of polluted waters continue to receive widespread attention. Symposium proceedings and books pertinent to toxic substances management and test procedures have appeared, as have several literature reviews pertinent to specific pollutants. The proceedings of the fifth annual ASTM symposium on aquatic toxicology presented a collection of papers directed to research needs in aquatic toxicology and hazard assessment, new concepts in aquatic toxicology, biological availability and sediment toxicity, and hazard assessment and water quality criteria.¹ A state-of-the-art overview pertinent …

The Structure Of Fresh Desiccated Coconut, J. F. Heathcock, J. A. Chapman

Food Structure

Light and electron microscopy have been used to study the structure of fresh coconut endosperm tissue and the changes which have occurred when this has been processed to the desiccated form. In fresh tissue, a marked gradation of cell size , shape and contents exists between inner and outer endosperm regions. Adjacent to the brown testa, cells are rigid, compact and lipid-filled while those cells lining the central water-filled cavity have thin, easily deformed cell walls and contain little lipid . Desiccated coconut be ing derived from fresh tissue, is similar in morphology but moisture is reduced from 50% to …

Evaluation Of Selected Properties Of Chlorinated Wheat Flours In A Lean Cake Formulation, J. Grider, E. A. Davis, J. Gordon

Food Structure

Cake flours treated with different levels of chlorine were evaluated by use in a Kissell cake formulation. Flour particle size distributions varied with chlorination level, but pH and specific gravity of the batters did not differ. Batter viscosity differences were observed at specific temperatures during heating of total batters. Temperature profiles differed positionally in the cakes, but these patterns of heat penetration were not related to level of chlorine treatment. However, water loss rates differed depending on the level of chlorine treatment indicating a more pronounced effect of chlorination level on the water loss characteristics of the cakes during the …

An Indirect Method To Estimate The Aerial Biomass Of Small Single Stemmed Woody Plants, R.D. Fitzgerald

Aspen Bibliography

No abstract provided.

Biodeterioration And Strength Reductions In Preservative Treated Aspen Waferboard, E.L. Schmidt, H.J. Hall, R.O. Gertjejansen, C.G. Carll, R.C. Degroot

Aspen Bibliography

No abstract provided.

Chemical Characteristics Of Precipitation And Hydrogen Input In Throughfall And Stemflow Under Some Eastern Canadian Forest Stands, M.K. Mahendrappa

Aspen Bibliography

No abstract provided.

Mapping The Distribution Of Aspen Defoliation Using Landsat Color Composites. (Mapping The Distribution Of Aspen Defoliation Using Landsat Color Composites [Malacosoma Disstria, Canada].), R.J. Hall, G.N. Still, P.H. Crown

Aspen Bibliography

No abstract provided.

The Utilization Of Carbohydrates In Aspen Roots Following Partial Or Complete Top Removal, R.D. Fitzgerald, J. Hoddinott

Aspen Bibliography

No abstract provided.

Aspen Regeneration After Commercial Clearcutting In Southwestern Colorado, G.L. Crouch

Aspen Bibliography

No abstract provided.

Role Of D Functions In Ab Initio Calculation Of The Equilibrium Structure Of H2s–Hf, Steve Scheiner

Chemistry and Biochemistry Faculty Publications

Full geometry optimizations are performed to determine the equilibrium geometry of the hydrogen‐bonded complex H₂S–HF. The angle between the plane of the H₂S moiety and the H‐bond axis calculated with the 4–31 G basis set is 106° as compared to the experimental value of 91±5°. This quantity is reduced significantly when d orbitals are added to the basis set, yielding an angle within experimental error of 91°. (AIP)

Defensive Adaptations And Natural Enemies Of A Case-Bearing Beetle, Exema Canadensis (Coleoptera: Chrysomelidae), R. B. Root, Frank J. Messina

Biology Faculty Publications

The larval habit of constructing and carrying a portable case has evolved many times in the Holometabola. It is a widespread trait of the Trichoptera and Lepidoptera (e.g. the Coleophoridae and Psychidae). Among the Coleoptera, casebearing is found in four related subfamilies of the Chrysomelidae, the so-called camptosomates: Clytrinae, Cryptocephalinae, Chlamisinae, and Lamprosomatinae (B6ving and Craighead 1931). The larval case of many insects is thought to function primarily in defense by providing armor or camouflage (Otto and Svensson 1980). Here we describe the uses of the case and other defenses in a chlamisine beetle, Exerna canadensis Pierce, and speculate briefly …

Monitoring Of Groundwater Levels For Real‑Time Conjunctive Water Management, Richard C. Peralta, Vince Mazur, Paul Dutram

Civil and Environmental Engineering Faculty Publications

Water users in the Arkansas Grand Prairie wish to maintain sufficient groundwater levels to: insure adequate groundwater reserves for time of drought, protect themselves from litigation caused by wells going dry, and insure a sustained yield. Achievement of these goals requires regular measurement of groundwater levels. Review of monitoring practice and technology indicates that spring and fall measurements taken over the entire area using steel tape and acoustic device is preferred for most long range planning. Continuous monitoring is indicated for critical parts of the region where saturated thicknesses are small. Desirable attributes of a data collection/transmission system for such …

Potential Use Of Arkansas River Water For Irrigation In The Plum Bayou Watershed, Richard C. Peralta, Paul W. Dutram

Civil and Environmental Engineering Faculty Publications

No abstract provided.

Progress Report For The Dairy Research Advisory Board, Various Authors

Other Documents

No abstract provided.

Factors Determining The Abundance And Distribution Of Rodents In A Shrub-Steppe Ecosystem: The Role Of Shrubs, Robert R. Parmenter

Biology

This study addressed the relative importances of shrub "resources" on a rodent community in a sagebrush dominated shrub-steppe ecosystem in southwestern Wyoming. Direct effects of shrubs (i.e., providing rodents with "food and cover") were assessed by removing shrubs from a 1.25 ha study plot and monitoring both rodent populations and their food resources. Shrub-related "food and cover" was found to be unimportant to deermice (Peromyscus maniculatus), Great Basin pocket mice (Perognathus parvus), northern grasshopper mice (Onychomys leucogaster) and Uinta ground squirrels (Speromphilus armatus), as shrub removal caused no significant changes in population sizes, sex ratios or age structure. Least chipmunks …

Utah State University Commencement, 1982 – Main Campus, Utah State University

Commencement Programs

Eighty-Ninth Annual Commencement of Utah State University

A Nutrition Education Componenet For Migrant Children Based On The K-6 Nutrient-Density Curriculum, Sandra Beadleson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A nutrition education component was developed, implemented, and evaluated for integration into the Title I migrant education program. The component was based on an evaluated nutrition education curriculum implemented by Brown in the elementary school. The nutrition education program was developed on the concept of nutrient density which measures the ratio of a food's nutrient contribution to its caloric contribution on a constant caloric basis. The nutrition component was modified to include behavioral objectives and concepts that partially met the needs of a migrant population in Utah.

The program was evaluated in the Title I programs in Corrine and Smithfield, …