Digital Commons Network^™

Inspection Of Single-Point Diamond Turning Tools At Low Accelerating Voltage In A Scanning Electron Microscope, Michael T. Postek, Christopher J. Evans

Scanning Microscopy

Single crystal diamond tools used in the machining process have been inspected in both the optical microscope and scanning electron microscope. Attention was focused on surface characteristics related to the specific polishing process and its relationship to cutting-edge structure. The need for tool inspection is discussed as well as the drawbacks with the inspection techniques presently used. Low accelerating voltage ( < 2.5 keV) inspection of uncoated diamond tools for machining is shown to be a viable method for the determination of polishing flaws that grossly reflect in the surface quality of the finished part.

The Effects Of Retinoic Acid And Butyric Acid On In Vitro Migration By Murine B16a Cells: A Quantitative Scanning Electron Microscopic Study, T. W. Mcgarvey, B. Persky

Scanning Microscopy

Retinoic acid (RA) and butyric acid (BA) were investigated for their effect on in vitro migration of highly metastatic murine B16a melanoma cells. These potential antitumor agents are known to alter the cytoskeleton. Our initial studies determined the 72 h cytostatic /cytotoxic concentration of RA (1 X 10^-6 M / > 1 X 10^-5M) and BA (1.5 mM) / > 2.0 mM). Cytostasis by RA and BA was confirmed by autoradiography and radioisotope incorporation. For migration assays, cells were plated on 3 and 5 μm diameter pore polycarbonate membranes. Complete media was added containing RA or BA at time …

Recent Uses Of Electron Microscopy In The Study Of Physico-Chemical Processes Affecting The Reactivity Of Synthetic And Biological Apatites, J. D. B. Featherstone, D. G. A. Nelson

Scanning Microscopy

Studies which used scanning electron microscopy (SEM) to investigate subsurface demineralization of dental enamel have recently been well reviewed. The purpose of the present paper was to review several studies, carried out in our laboratories, which have used electron microscopy to examine physicochemical properties of synthetic and biological apatites, to relate these results to previous studies, and to present new data.

Aspects of the ultrastructure of hydroxyapatite and carbonated-apatites have been observed by high resolution transmission electron microscopy, and related to shape and growth of these crystals.

Surface morphologies of discs prepared from precipitated carbonated-apatites and from ceramic carbonated-apatites were …

On-Farm Reservoir Construction In The Grand Prairie Region Of Arkansas: An Engineering Economic Analysis, Jayson K. Harper, Richard C. Peralta, Robert N. Shulstad

Civil and Environmental Engineering Faculty Publications

No abstract provided.

Parent-Child Privileges, Angela Furca

Undergraduate Honors Capstone Projects

This paper will demonstrate the desirability and necessity of recognizing the parent-child testimonial privilege. As this is a legal research paper, it will present arguments for both sides of the issue, while proving that the parent-child testimonial privilege deserves recognition and is fundamental in maintaining healthy family relationships.

Microvascular Casting Of The Lung: Bronchial Versus Pulmonary Artery Filling, Dean E. Schraufnagel

Scanning Microscopy

To determine the importance of the pulmonary or bronchial arteries as the site of injection to cast the lung vasculature of rats, we retrospectively compared a group of normal Sprague-Dawley rats that were cast through either the caudal vena cava and right ventricle leading to the pulmonary arteries or through the aorta and bronchial arteries. There was no difference in the appearance of the whole casts or cast-to-lung weight ratios between the two groups, although an incompletely cast lung that was injected through the aorta showed preferential filling of the pleural and peribronchial regions. Nuclear impressions, a sign of good …

Multi-Layer Structure Of Nitrogen Adsorbed On Graphite, S. K. Wang, J. C. Newton, R. Wang, H. Taub, John R. Dennison, H. Shechter

All Physics Faculty Publications

Elastic neutron diffraction has been used to study the structure and layering of nitrogen films adsorbed on the (002) surfaces of an exfoliated graphite substrate. The neutron-diffraction pattern of the fully compressed monolayer at a coverage Θ=1.67 layers and a temperature ≲11 K which we reported earlier has been reanalyzed (unity coverage corresponds to a complete layer having the commensurate √3 × √3 structure). We now find it to be consistent with a four-sublattice pinwheel structure as well as the two-sublattice herringbone structure which we found previously. Below 11 K, we infer crystallization of the bilayer at Θ between 2.6 …

Duration Of Spermatogenesis And Spermatozoan Transport In The Mink (Mustela Vison), Holly Ruth Franz

Biology

The objectives of this study were twofold: first, to determine the time required for development of spermatozoa in the mink (Mustela vison) from the primary spermatocyte to the differentiated spermatozoa in the testis and appearance of sperm in the epididymis; and, the second, to determine the epididymal transport time of the spermatozoa. Using radiotracer techniques, ten mink were injected intravenously with tritiated thymidine and 16 testes were removed over a period of 56 days. Samples were obtained between January and March, the period of maximal testicular development of mink. The tissues collected in the study were processed using …

Apple Maggot In Utah: Developmental Parameters Related To Temperature And Weather Conditions, Sheri Lee Smith

Biology

Populations of apple maggot were collected from an abandoned tart cherry orchard and from a native black hawthorn patch. Developmental times for egg, larvae and pupae were determined at 15, 20, 25 and 30 °C and then were compared to determine if differences existed between populations. For the egg stage, there were no significant differences between the populations at any temperature. For the larval stage, there was a significant difference in developmental times between populations only at 15 °C. For pupae undergoing diapause, significant differences were found at 15, 20 and 25 °C. Based on developmental times, pupal developmental thresholds …

Cultural Resource Inventory And Testing In The Salt Creek Pocket And Devils Lane Areas, Needles District, Canyonlands National Park, Utah, Betsy L. Tipps, Nancy J. Hewitt, P-Iii Associates, Inc.

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

This document is the final technical report on the first phase of a multiyear archeological program conducted in Canyonlands National Park. Some of the purposes of this project are to gather information for upgrading the park's interpretive program, increase the scientific understanding of Canyonlands' prehistory, and prepare a research design to guide future investigation. Archeological inventory of 4500 acres in the Needles District revealed a previously undocumented Archaic occupation and showed that Formative peoples using the area were primarily the Mesa Verde Anasazi, not the Fremont and Anasazi as previously thought. The data also indicate that prehistoric peoples used the …

Utah State University Commencement, 1989 – Main Campus, Utah State University

Commencement Programs

Ninety-Sixth Annual Commencement of Utah State University

Properties Of Esterases From Lygus Hesperus Knight (Hemiptera: Miridae) And The Roles Of The Esterases In Insecticide Resistance, Kunyan Zhu

Biology

Properties of esterases from Lygus hesperus Knight and the roles of the esterases in insecticide resistance were studied with field populations. The esterases are 8-type esterases, and carboxyl esterases are predominant in both susceptible (S) and resistant (R) populations. The optimal pH and temperature were 7.0-8.0 and 40-45° C, respectively, for general esterases, and 8.5 and 35-40° C, respectively, for acetylcholinesterases. For general esterases, Km determined with 1-naphthyl acetate at 43° C was 8.8x10^-6 M for the males and 1.3x10^-5 M for the females, while Vmax was 27.0 and 136.1 umol/min/mg protein for the S and R populations, …

The Limits To Change In East Europe, Elesha Kay Fetrow

Undergraduate Honors Capstone Projects

What does every European need today? "Provided peace and security are guaranteed, every European seeks to live in an open and prosperous society, in a society striving to put an end to injustice and capable of offering every individual the opportunity of making the most of his or her abilities while serving universal human ideals."

Moral Development Theories: Controversy, Bias, And A New Perspective, Julie Ann Robinson

Undergraduate Honors Capstone Projects

This thesis examines the well-established Kohlberg hierarchical model of moral development and allegations of bias within the model. The Cognitive-Development approach to moral development, the Kohlberg model, and a counter-model proposed by Carol Gilligan are presented. The interview methodology commonly used by moral development researchers as well as the applicability of interview data to actual moral decision-making is questioned. A web model that includes the interactions of culture and education in moral modifications is presented as an original alternative to the step-wise models currently in use.

Existentialist Themes In Three Works, Mark D. Morrison

Undergraduate Honors Capstone Projects

The goals behind researching and writing this thesis are multifaceted and although many are outside of the scope of this paper, they express basic reasons for my choice. The paper is titled "Existentialist Themes in Three Works", and development and discussion are literary and philosophical in focus.

The first and most important reason for my choice was that, being a biology major, this project has provided the opportunity to pursue one of my minors, French. It has given me the chance to work under the direct tutelage of Dr. Lynne Goodhart, whom I would like to thank wholeheartedly. All three …

Music And Plato In Shakespeare's Henry Iv, Part I, Kenneth R. Williams

Undergraduate Honors Capstone Projects

Surprisingly, the importance of music in the plays of Shakespeare and his contemporaries has received little attention from modern scholars. Much has been written on the music which would have affected Shakespeare, but no one has focused his or her attention on Shakespeare's use of music as a dramatic device, i.e., as an aid to intensify and forward action, convey meaning, portray characters, and create atmosphere, such as a mood of mysticism or awe. In Henry IV, which I shall consider here, music as a dramatic device supports the Platonic concept of unity and the tripartite structure of both the …

An Analysis Of Institutional Approaches For Management Of Common Rangeland Resources In Sub-Saharan Africa, Mohale Gabriel Sekoto

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

The purpose of this report is to address the issues that are relevant to the management of common rangeland resources in Sub-Saharan Africa. I feel that the issues presented here are among some of those which are important and need to be considered in order to understand the kind of performance perceived about the efforts to develop the range and livestock in pastoral societies. In this report, three case studies have been reviewed, regarding institutional approaches tried to manage common rangelands. These case studies are about group ranches in Kajiado District, Kenya and in Upper Volta and the Sehlabathebe Grazing …

Management, Foraging Behavior, Diet Composition And Forage Quality Of Free-Ranging But Herded Camels In Ceeldheer District, Central Somalia, Ahmed A. Elmi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In Somalia, camel (Camelus dromedarius) survivability and milk production has been higher than for other domestic livestock and contributes substantially to the subsistence of Somali pastoralists. The objective of this research was to study management, foraging behavior and nutrition of camels in their natural habitat to determine how production continues under seasonal nutritional stress.

Management systems of Ceeldheer pastoralists are based on available natural pasture and water. The natural rotation grazing system maintained an ecological equilibrium in the District.

Pastoralists manipulate their herds to suit existing environmental conditions, family needs and labor availability for herding. In herd management, …

Using Computer Imaging To Assess Visual Impacts Of Forest Insect And Disease Pests, Daniel Rabin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forest insect and disease pests alter the appearance of trees, thereby impacting visual resources. Because of the complexity of most forest landscapes, the degree of visual impact of pest-infested forest stands is difficult to quantify.

This paper describes a method of measuring visual impacts of pest-infested forest stands. Photographs of healthy Ponderosa pine trees were entered into a computer video-image-processing system. Using this system, images of trees were altered to simulate different degrees of infestation by limb rust, a forest pathogen.

The altered and unaltered images were shown to groups of observers who rated the scenes in terms of "scenic …

A Longitudinal Study Of Dietary Intake And Influence Of Iron Status On Infants' And Toddlers' Mental And Motor Development, Steven Matley Wood

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Thirty-two non-anemic children were assessed clinically, biochemically and anthropometrically at six months, one year and two years of age to investigate the relationship of iron status to mental and motor development. Using dietary history and dietary record instruments, dietary iron was estimated and compared to the National Food Consumption Survey (1985) and the Recommended Dietary Allowances (RDA) for corresponding age groups. The Bayley Scales of Infant Development (which assess mental and motor development) and the Caldwell Home Inventory (which evaluates the environmental stimuli) were performed and correlated with blood iron parameters, anthropometric measurements and dietary nutrient intakes.

Nutrient intakes of …

Chemical Evaluation And Biological Vitamin A Activity Of The Major Carotenoids In The Hybrid Carrot Beta Iii, Cynthia M. Schweitzer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Genetically enhanced high-carotene Beta III hybrid carrot was compared to a commercial carrot cultivar, Nantes Coreless, for carotene content and macronutrient composition. Beta III contained more than twice the total carotene content of Nantes Coreless, with α-carotene/β-carotene ratios higher in Beta III. Total solids from protein, lipids, and carbohydrate were greater in Beta III than in Nantes Coreless. Beta III contained about five times the amount of sucrose and one-fifth the amount of glucose and fructose than Nantes Coreless or reported literature values.

Comparison of the bioavailability of carotenes in Beta III and Nantes Coreless to purified β-carotene and retinyl …

The Role Of Sibling Authority In The Occurrence Of Prosocial And Aggressive Behavior In Handicapped And Nonhandicapped Sibling Dyads, Todd J. Braeger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects that each sibling's relative cognitive and physical abilities may have on the quality of sibling interaction are not clearly understood in either nonhandicapped or handicapped sibling dyads. A measure of sibling authority based on behavioral observations of sibling interaction was developed that represents how sibling abilities are translated into sibling power within handicapped and nonhandicapped sibling dyads. This measure of sibling authority was related to the occurrence of prosocial and aggressive behaviors in sibling dyads with and without a child with handicaps. Ninety-three sibling dyads participated. Included were 34 nonhandicapped sibling dyads, 12 sibling dyads in which the …

An Investigation Of Stability, Change, And Observed Associations During Infant-Mother Face-To-Face Interaction, Sarah Elizabeth Gable

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Researchers of social development during infancy have long viewed social competence as a reflection of the infant's experiences during early social interactions. In this context of social interaction, the infant's earliest developmental task involves the ability to regulate arousal; with continued development and the accumulation of interactional experiences, the infant takes a more active role as an initiator/elicitor of interaction. A particularly salient type of social exchange during infancy occurs when mother and infant engage in face-to-face interaction. Consequently, it was the goal of this study to examine maternal and infant behavior in the context of face-to-face interaction in order …

Perceived Affective And Behavioral Characteristics Of Mother-Daughter Relationships And Subsequent Mentoring Relationships, Anne Marie Mcshane

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Mentoring has been recognized as an important relationship in a variety of circumstances. This study was conducted for the purpose of determining the perceived benefits or disadvantages of a mentor relationship and identifying characteristics of the relationship. Another objective was to explore to what extent the nature of the mother/daughter relationship functions as a factor that makes the choice of a mentoring pattern more likely.

The study sample consisted of 47 females, 12 graduate students and 35 assistant or associate professors on the faculty at Utah State University. The subjects completed several mother/daughter inventories, a mentoring inventory, and a personality …

Relationships Between Motivational Orientations And Participants' Perceptions Of An Electronic Distance Education Learning Environment, Charles Wynn Wilkes

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to investigate the relationships between students' motivational orientations and their perceptions of an electronic distance education (EDE) environment. Subjects were 156 participants (81 women, 75 men; 83 undergraduates, 73 graduate students) enrolled in Utah State University's electronic distance education system, Com-Net.

A comparison group was also utilized, that consisted of 85 participants (64 females, 21 males; 34 undergraduates, 51 graduates) from rural Utah enrolled in Utah State University extension programs. These students were from seven classes which were taught by the traditional method with an instructor physically present.

Correlation coefficients were computed to test …

Bluetongue Virus Evolution: Sequence Analyses Of The Gene Coding For The Major Serogroup Antigen, Timothy F. Kowalik

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was undertaken to better understand the genetic relationship of five United States prototype bluetongue virus serotypes. Genomic double-stranded RNA segment S1, which encodes the major core protein and serogroup antigen, VP7, was used as a marker gene for the sequence analyses. The S1 segments from BTV-2, 11, 13, and 17 were cloned and sequenced by methods developed during the course of this investigation. These results were compared with previously published sequence data from segment S1 of BTV-10. The Sl segments are 1156 base pairs long and contain a common open reading frame capable of coding for a protein …

An Evaluation Of The Plasma Frequency Probe, Charles Merrill Swenson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Electron density in a plasma can be measured by determining the plasma frequency. For 20 years this electron density measurement technique has been used with the plasma frequency probe. The purpose of this paper is to characterize, evaluate, and suggest improvements for this instrument. Although the current plasma frequency probe is a highly successful instrument for measuring absolute electron density in the ionosphere, several areas for improvement were found. These were in the radio frequency head and the voltage controlled oscillator. Currently, the plasma frequency probe is approximately 20% accurate in determining absolute densities around 1.5x10⁴ electrons/cm³ but …

Neuroanatomical Asymmetry, Handedness, And Family History Of Handedness: A Study Of The Markers Of Structural And Functional Lateralization, Steven A. Lifson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated the associations between (1) handedness (demonstrated preference of one hand for the performance of most unimanual tasks) and neuroanatomical asymmetry (measurable differences in width between the cerebral hemispheres) and (2) familial history of handedness (the presence of a left-handed sibling or parent of a right-handed subject) as an intervening factor in the relation between handedness and neuroanatomical asymmetry. Width measurements of the brain were derived from computerized tomographic (CT) films and grouped in to categories by hand preference (measured by the Edinburgh Handedness Inventory) and family history. The measurements of right (n=68), right with left-handed relatives (n=24), …

Mental Status And Functional Behavior In Male Geriatric Patients, Gregory Lee Mayer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It was the goal of this study to examine the ecological validity of a number of measures of mental status for geriatric individuals. Subjects were 40 alert, ambulatory male VA patients. Mental status instruments included the Mini-Mental State Examination (MMSE), the Wechsler Memory Scale (WMS) and the Vocabulary subtest of the WAIS-R. Measures of functional behavior included the Woodcock-Johnson Scales of Independent Behavior (SIB) and the Parachek Geriatric Behavior Rating Scale (PGBRS). Significant relationships were found between the MMSE and the SIB, between the WMS and the SIB, and between the WMS and the PGBRS. It was found that estimation …

Assimilation And Accommodation In Family Discourse: A Longitudinal Analysis, Marcia Summers

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Assimilative behavioral strategies provide continuity through maintenance of similarities, traditions, and interactions, while accommodative strategies result in social innovation through the creation of new modes and interactive patterns (J. Block, 1982; J. H. Block, 1983). It was hypothesized that females would show assimilative discourse patterns through the maintenance of conversational topics, while males would show accommodative patterns through more frequent changes in conversational topic, and that the roots of this pattern lie in family conversation. Nineteen families were videotaped at one month, four months, and four years following the birth of their second child. Results showed that gender-differentiated use of …