Digital Commons Network^™

Analysis Of Minerals Using Specimen Isolated Secondary Ion Mass Spectrometry, J. B. Metson, G. M. Bancroft, H. W. Nesbitt

Scanning Electron Microscopy

Considerably improved suppression of molecular ions in secondary ion mass spectrometry (SIMS) spectra of nonconductor minerals has been obtained using a CAMECA IMS-3f ion microscope with unconventional operating conditions [so-called specimen isolated (SI) conditions]. In a zircon spectrum close to forty elements are positively identified and molecular ions such as oxides and hydrides have very low intensities. Thus, with a ²⁸Si⁺ intensity of 10⁶ cps, the Si⁺/Si0⁺ ratio is 10⁵, and the ³⁰SiH⁺ intensity is low enough to enable quantitative analysis using ³¹P⁺ down to 0.01 wt % …

A Generic And Subgeneric Revision Of The Heriades Genus-Group (Hymenoptera: Megachilidae), Terry Griswold

Biology

This study presents the first part of a projected worldwide revision of the osmiine bees (Family Megachilidae). Based on a cladistic analysis of the Megachilidae, the osmiines are considered a monophyletic group and are accorded formal rank as the Tribe Osmiini in the Subfamily Megachilinae. The Heriades Genus-group is recognized as an informal group of related genera within the Osmiini. Eight genera are recognized within the Heriades Genus-group: Afroheriades Peters (=Archeriades Peters, new synonymy), new status, Heriades Spinola, Hofferia Tkalcu, Noteriades Cockerell, Protosmia Ducke, Pseudoheriades Peters, Stenoheriades Tkalcu, new status, and Xeroheriades Griswold. Two new subgenera of Heriades, …

An Inflation Forecasting Model For The 1980s, Peter J. Saunders

Economic Research Institute Study Papers

The 1970s and early 1980s were characterized by accelerating inflation associated with increasing levels of unemployment. The traditional demandpull and cost-push theories of inflation failed to satisfactorily explain the prevailing situation. Instead, a plausible explanation for this unusual economic occurrence was offered by the rational expectations theory. It could conceivably be argued that under the conditions of increasing uncertainty about future price movements, the economic participants may adopt rational type in favor of the traditional adaptive approach.

Costs, Benefits And The Optimal Rotation Of Standing Forests, Donald L. Snyder, Rabindra N. Bhattacharyya

Economic Research Institute Study Papers

The Faustmann model has played a key role in the determination of optimal forest rotations. Faustmann introduced a simple and deterministic competitive economic model, the objective of which was to maximize the present value of perpetual returns to the fixed factor of production, a unit of timber land. The optimal rotation problem, as viewed by him, is a timber management problem abstracting from the important multiple use characteristics of forest land. Hartman (1976) and Strang (1983) developed a modified Faustmann model where the forest resource stock 'per se' is assumed to have consumptive value in the form of "recreation", a …

Dispersal Of Vesicular-Arbuscular Mycorrhizal Fungi In A Disturbed Arid Ecosystem: The Potential Roles Of Biotic And Abiotic Agents, Nancy J. Warner

Biology

An evaluation of wind, small mammals and grasshoppers as dispersal agents of vesicular-arbuscular mycorrhizal (VAM) fungi was conducted in a shrub-steppe community disturbed by strip-mining in southwestern Wyoming. The capacity of each type of dispersal agent to move spores was assessed through survey and experimental sampling techniques. The collection of air samples, grasshoppers and rodent and grasshopper feces revealed that all agents studied carry VAM spores, especially in late summer. This pattern correlates well with the sporulation phenology of VAM fungi. While some spores recovered from rodent feces were germinable, those obtained from grasshoppers were not under the conditions tested. …

Effects Of Dietary Levels Of Essential Fatty Acids On Rotaviral Gastroenteritis In Infant Mice, Kamyar Abolhassan Zahedi

Biology

Effects of dietary levels of essential fatty acids (EFA) on rotaviral gastroenteritis were studied using the infant mouse as the model animal. Female mice were placed on diets devoid of EFA (0%) for 30 days. Nine days prior to breeding they were divided into three groups receiving 25%, 100% and 200% of the normally recommended quantity of dietary EFAs and were kept on this diet throughout the studies. Two-day-old offspring were infected orally with cesium chloride-purified murine rotavirus (MRV) and the extent of infection was determined. The severity of diarrhea, as exhibited by greater ratios of intestinal weight to whole …

Seasonal Feeding Behavior And Forage Selection By Goats In Cleared And Thinned Deciduous Woodlands In Northeast Brazil, Roberto Cesar Magalhaes Mesquita

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The seasonal feeding behavior, forage preferences and body weight responses of goats were studied under three densities of woodland (called caatinga), and under three stocking rates. The experiment was located in the semi-arid tropics of northeastern Brazil at 3 42' South latitude, and 40 21' West longitude at an elevation of 75 meters. Mean annual precipitation of the area is 832 mm.

Removing the shrubs and trees increased yields of herbaceous only on partially-cleared sites. Goats gained body weight (kg BW/ha) during the wet season, with the cleared treatment showing the best body weight response per unit of land. However …

Growth And Water Relations Of Mountain Big Sagebrush On Reclaimed Mine Soils In Southwestern Wyoming, Alan T. Carpenter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mined-land reclamation practices in shrub-steppe ecosystems can be augmented by planting seedlings of locally dominant shrubs, e.g., mountain big sagebrush. Dispersion pattern could affect sagebrush performance by influencing amounts of windborne snow, soil and litter which accumulate around shrubs and by influencing water withdrawal by roots. Mountain big sagebrush seedlings were planted in plots on a reclaimed coal strip mine in two dispersion patterns: singly and in clumps of four at the same overall density.

Performance of mountain big sagebrush was monitored during two growing seasons. Measures included plant survival, end-of-growing season aboveground biomass, leaf water potential components, soil water …

An Autecological Study Of Dyers Woad (Isatis Tinctoria L.) On Utah Rangeland, Ann T. Fuller

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Northern Utah rangelands have become infested with dyers woad (Isatis tinctoria L.) and control is needed. Mechanical and chemical control on rangelands produce undesirable effects. A possible alternative is biological control, but information is not available on plant response to this control method. This autecological study and simulation of control methods examined dyers woad phenology, seed endurance and response to simulated grazing, hand rogueing and plowing. The phenology study documented dyers woad growth patterns from May 1982 to November 1983. During the first year, 65 percent of the seedlings died while the remaining 35 percent grew rosette leaves. During …

Petrology And Mineralogy Of Tertiary(?) Volcanic Rocks West And Southwest Of Kelton (Box Elder Co.), Utah, R. L. Voit

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Kelton, Utah, area has numerous, isolated basaltic outcrops of probable Tertiary age mostly in the form of cuestas with steep faces displaying columnar joints. One ash-flow tuff is located in the southeastern part of the study area. Basaltic fragments in the tuff indicate that pyroclastic activity was preceded by extrusion of basalt.

Effects of Lake Bonneville on the basaltic outcrops include wave­cut terraces, scarps, and other wave-built forms in low lying areas. Massive carbonate deposits formed at levels of former shorelines of Lake Bonneville. Tertiary and Quaternary deposits cover the low- lying areas between basaltic flows, and consist of …

Petrology And Mineralogy Of Tertiary(?) Volcanic Rocks Of Snowville Area, Utah, And Tertiary-Quaternary(?) Volcanic Rocks Of Table Mountain And Holbrook Areas, Idaho, Yunshuen Wang

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Basalt flows occur in the Snowville area of north-central Utah and the Table Mountain and Holbrook areas of south-central Idaho. All basalt flows are aphanitic in groundmass, and contain olivine, plagioclase, augite, and opaque oxides. They can be distinguished by texture. Snowville basalt has predominantly subophitic to intergranular textures. Table Mountain basalt is fine grained, with stumpy groundmass plagioclase and equant ilmenite crystals. Holbrook basalt has pilotaxitic to intergranular textures, with the presence of plagioclase phenocrysts and characteristic exsolution lamellae in Fe-Ti oxides. The olivine grains in Holbrook area are intensely oxidized to Fe-Ti oxides.

Snowville basalt contains olivine phenocrysts …

The Water Economy Of Nestling Swainson's Hawks (Buteo Swainsoni), John S. Kirkley

Biology

The six major components of the water economy of nestling Swainson's Hawks (Buteo swainsoni) were quantified and incorporated into water budget scenarios demonstrating the effects of heat stress and dietary composition on water balance. Four consecutive 1-week food trials were conducted on each of 16 nestlings to measure rates of food consumption, growth, energy utilization, excrement production and pellet production. Rates of evaporative water loss and CO2 production were measured gravimetrically on 28 nestlings under 4 thermal conditions (25°C, 35°C, 42°C, and 30°C plus sunlight) using an open flow indirect calorimetry system. Water utilization components ( i.e., water …

The Relationship Between Therapist Approach Postures, Avoidance Postures And Posture Sharing, And Subjects' Experience Of Rapport, Lawrence A. Carcelli

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The relationship between approach, avoidance and congruent postures and the experience of rapport was investigated. Sixty undergraduate college students (30 male, 30 female) were interviewed by a therapist who displayed either approach postures, avoidance postures or who posture shared. The degree of rapport experienced by the 20 subjects in the three groups was compared. In addition, the subjects' behaviors were divided into four groups (n = 11, or 19) along two orthogonal dimensions (high and low congruency and immediacy) and the degree of rapport experienced by the four groups compared. No statistically significant results were found in either analysis. An …

Design And Field Layout Of Irrigation Flow Measuring Devices In The River-Lab At Utah State University, Abelardo M. Arriaran

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

The purpose of this report was to develop a design and field layout of irrigation flow measuring devices in a design channel in teh River-Laboratory at Utah State University. This study was conducted considering a maximum discharge of 3.5 cfs and the profile of the channel in the selected area. Four kinds of flow measuring devices to be installed in series one after another were considered: a Parshall flume, a broad-creasted weir, a cutthroat flume, and the rectangular sharp-crested weir. The locations given are based on the hydraulic conditions for each device, the available head, the head loss that each …

Slow Rate Sand Filtration With And Without Clinoptilolite: A Comparison Of Water Quality And Filtration Economics, Gordon P. Foreman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Slow rate sand filtration (SSF) amended with a 20 cm surface layer of clinoptilolite, a natural zeolite, was compared to SSF with no amendment in a field scale SSF facility treating 85 m³/d of water. Parameters examined included turbidity, coliforms, and ammonium removal. The control filter with sand and the experimental filter amended with the zeolite were also compared with respect to duration of filter cycle, cold weather operation, and economics.

Amended and unamended filters were approximately equivalent with respect to ammonium and coliform removal at 10° C. The zeolite amended cell was superior to the unamended cell …

Anthropometry, Metabolic Control And Dietary Intake Of Youth With Insulin-Dependent Diabetes Mellitus, Rochelle A. Follaco Clark

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to describe a sample of insulin-dependent diabetic youth in terms of selected anthropometric measurements, level of metabolic control and dietary intake. The 22 subjects (10 males and 12 females) were between the ages of seven to 16 years and, except for one female, regularly attended a multidisciplinary outpatient diabetes clinic.

The study involved cross-sectional observation of height, weight, triceps and subscapular skinfold measurements, mid-arm muscle circumference and weight:height ratios, and comparison of these measurements to national norms derived from non-diabetic controls. Levels of metabolic control were observed using glycosylated hemoglobin values, and examined for …

Petrology Of The Late Proterozoic(?)-Early Cambrian Arumbera Sandstone, Western Macdonnell Ranges, North-Central Amadeus Basin, Central Australia, Lonn P. Hamp

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Arumbera Sandstone consists of mappable informal units which are repeated in a vertical, cyclic succession. Sandstones of fluvial origin form resistant strike ridges separated by strike valleys, which consist of recessive sandstones and mudrocks of marine origin.

Lithofacies 1a, 2b, and 3a are probably of marine origin in intertidal environments. Trace fossil assemblages in lithofacies 3a suggest Skolithos and Cruziana inchnofacies were present. Lithofacies 1e, 2a, 2c, 3b, and 4a are probably of fluvial origin, as the result of coalescing braided stream deposits. The Arumbera Sandstone probably was deposited in a deltaic environment characterized by low wave energy, a …

Decisions Of Pregnant Adolescents As They Affect Later Well-Being, Myra Lynch

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to examine the quality of family life presently experienced by women who were premaritally pregnant as teenagers. Self-esteem and general life satisfaction were measured in order to evaluate the results of pregnancy decisions made five to 10 years earlier. A survey design was used to (1) obtain demographic data, (2) analyze the relationships between these women and their parents, (3) determine the level and type of education completed by the women, (4) compare mothers who married before the birth of the child, single mothers, and mothers releasing their children for adoption on many variables …

Cavitation Limits And The Effect Of Aeration On Cone Valves, Bart "L" Mumford

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Cavitation in cone valves can cause eventual valve failure. However, little data are available on cavitation limits for solid plug cone valves. Flow conditions were identified for a 6 inch cone valve where incipient, critical, incipient damage, and choking cavitation limits occurred at valve openings between 20 and 70 degrees. A description of how these limits are used to predict cavitation intensity is given. Air was used to reduce the damage levels. Aeration increased the allowable pressure drop for damage free operation 6 to 72 percent for valve openings less than 70 degrees. A chart is given for predicting when …

Donating Behavior In Children: The Effects Of The Model's Similarity To The Observer, The Observer's Familiarity With The Model And Parental Models, Charles Ray Owens

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Model similarity and familiarity were investigated for adult and similar aged models demonstrating prosocial behavior. Third, fourth and fifth graders (75 male and 75 female) participated.

Subjects were given questionnaires regarding their most and least preferred peers and their most preferred parent. The models were described as similar to the subject for some groups. Subjects were given instructions concerning a sorting task and cash certificates they would earn.

Fifty control subjects viewed a video that contained neither prosocial nor antisocial behavior. For the remaining subjects, a 2 (sex of subject) X 2 (similar age model versus adult model) X 5 …

A Comparison Of Evaluation Models For Handicap Intervention In A Head Start Program, Carin Niebuhr

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Model A and Model C Title I evaluation options were compared by using both options to measure the effectiveness of handicap intervention in a Head Start program. Two hundred three children in Jackson County (Oregon) were pretested with the Developmental Indicators of Learning Test (DIAL), the Peabody Picture Vocabulary Test (PPVT), the Visual-Motor Integration Scale (VMI), and the Carrow Elicited Language Inventory (CELI). The 43 children who scored below the predetermined cut-off level were placed in a six-month intervention program. One hundred forty-nine children remaining in the Head Start program in May were posttested with the same tests. Model …

The Effects Of Prosocial And Aggressive Videogames On Children's Donating And Helping, John H. Chambers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this research was to investigate the effects of prosocial videogames, played both singly and cooperatively, and aggressive videogames, played both singly and competitively, on children's prosocial behavior. Eighty boys and 80 girls, half third and fourth graders, and half seventh and eighth graders, were randomly assigned to one of five conditions. In a control condition, children answered questions about videogame experience and enjoyment. In two of the treatment conditions, children played a videogame with prosocial content (a human-like fantasy character rescuing another from danger); half of the children played this game singly, while the other half played …

The Relationship Of Type A And Type B Coronary Behavior Patterns And Achievement Striving, Jolene Lowry Adams

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to conduct a systematic replication of the experiment of Burnam, Pennebaker, and Glass (1973) using an adult population and the Jenkins Activity Survey. Additionally, this study attempted to address the issue of whether the previous results would be substantiated when a non-college sample was used.

The subjects consisted of40 females and 40 males who volunteered to participate in the study. All subjects were given the Jenkins Activity Survey and randomly assigned to Condition I, the No Deadline condition, or Condition II, the Deadline condition. The subjects in the No Deadline condition were given arithmetic …

Handicapped Tutors And Tutees: A Meta-Analysis Of Critical Variables, Stephen Blaine Cook

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Tutoring has been used as an instructional method for many years. Reviewers have made narrative conclusions that tutoring has many academic, social, and emotional benefits for the tutor and tutee.

This study applied meta-analysis techniques to studies in which learning disabled, behaviorally disordered, or intellectually handicapped elementary and secondary school students were used to tutor academic content material to handicapped tutees. It was found that the experimental subjects made greater gains on the academic material than the control groups. Gains on social/emotional measures were minimal. Various research design and tutoring intervention characteristics were examined for their influence on tutor and …

The Petrology And Mineralogy Of Tertiary(?) Olivine Trachyte In The Harrington Peak Quadrangle, Southeastern Idaho, Amanda Shearer-Fullerton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Harrington Peak Quadrangle is located within the Caribou National Forest of southeast Idaho. Within this quadrangle are outcrops of olivine trachyte of Pliocene(?) age overlying sedimentary rocks of Mississippian to Tertiary age. The region contains thrust faults and later normal faults (generally trending north-south} formed during Basin and Range extension.

The Largest outcrop of olivine trachyte (approximately1 1/2 X 3 km) probably formed as the result of a fissure eruption. Two other outcrop areas show evidence of being sites of local extrusion.

Whole-rock chemical analyses revealed the olivine trachyte to have moderate amounts of SiO₂ and Al_{2O …}

A Comparison Of Eight Selected Sports Bras: Biomechanical Support, Overall Comfort Ratings And Overall Support Ratings, Lajean R. Lawson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper was to evaluate eight currently marketed sports bras for differences in control of vertical displacement of the breast, overall comfort scores, and overall support scores for A, B, C and D cup sizes. An additional goal was to determine and compare differences in the vertical displacement of the nude breast among the four cup size groups. To determine differences in vertical displacement, subjects were filmed while jogging on a treadmill, and film data were analyzed frame by frame. To determine differences in overall comfort and support ratings, subjects tested each of the eight bra styles …

Effects Of Antiepileptic Drugs On Immune Function In Human Subjects And Mice, Nadine C. Margaretten

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A number of immune abnormalities have been found in epileptic patients treated with antiepileptic drugs (AED). The alterations seen range from mild suppression of immunoglobulins to severly impaired humoral and cellular immunities. There is evidence for both drug effects and genetic or acquired factors as contributors to these abnormalities. In order to examine the basis for immune abnormalities in patients with epilepsy, a number of experimental designs were employed: clinical studies, in vitro studies, and use of an animal model.

Peripheral blood mononuclear cells (PBMC) isolated from epileptic patients currently receiving AED were found to have a reduced OKT4+/0KT8+ ratio. …

Cellular Immunity In Children With Down Syndrome (Trisomy-21), Roger Lee Noble

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Individuals with Down syndrome (US) suffer from increased incidence of respiratory infections and lymphoblastic leukemia, and a death rate that is particularly high in the first 5 years of life. Relatively few studies have probed immune parameters in young US children. Primary immune defects in DS may be masked by a degree of immune maturity in adults, and hygienic factors may have an effect on immune capability throughout the years. A study of young children can give clearer evidence of the actual primary immune defects in DS.

Blood samples were drawn from 20 DS children under 6 years old and …

Analysis Of A Rocket-Borne Resonant Scatter System For Measurement Of Atomic Oxygen, Neil B. Myers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A computer model has been developed at Utah State University for interpreting the results of a rocket-borne resonant scatter measurement system using 1304 A radiation. Atomic oxygen densities are obtained from 65 to 140 km from three rocket flights. The resolution of the system is < 0.1 km, and considerable structure has been observed. The variety of shapes exhibited by the three profiles suggest a dynamic nature to atomic oxygen density profiles in the lower ionosphere. Maximum densities between 2.6 x 10¹¹ and 1.2 x 10¹² cm^-3 were observed at altitudes between 92 and 95 km.

Optimal Forest Rotation: Decisions Under Conditions Of Certainty And Uncertainty, Rabindra Nath Bhattacharyya

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The existing literature determining the optimal rotation period of a forest stand under conditions of certainty, as well as under uncertainty, lacks the genera 1 scope to be useful. A forest provides timber of commercial value, a flow of recreational services, and other valuable environmental services. Providing goods and services involves benefits as well as costs. Relevant management decisions depend on the net values that can be obtained. The present work developes a more general model for determining an optimal rotation period incorporating various fixed and variable costs associated with timber production and recreational services in an environment of certainty …