Doctor of Philosophy

dissertationThis dissertation reports the work I have completed with two research projects, using paleoecological methods to compare precipitation histories to inform archaeological investigation at two sites. The first chapter will present an analysis of the population history of leporids (rabbits and hares) from Abrigo de los Escorpiones, a shell midden site on the coast of northern Baja California, over the past 10,000 years. Comparison of that population history to sedimentary-based records of the frequency and intensity of El Niño events over the same time period reveals strong correlations between precipitation and overall abundance, taxonomic composition, and age structure of the leporid population at the site. The second chapter of this dissertation reports the results of a multiproxy paleoenvironmental reconstruction of climate during the past 2000 years at a site in Range Creek Canyon, in the Tavaputs Plateau region of eastern Utah. Results from the analysis of fossil pollen, macroscopic charcoal, sediment loss on ignition, magnetic susceptibility, and stable carbon isotope analysis of sediments demonstrate the site was used by human horticulturalists as a maize field during the Fremont occupation of the canyon between roughly AD 800 and AD 1100. Additionally, the paleoenvironmental proxies reveal the period of Fremont occupation of the canyon likely saw less summer precipitation than today, very likely necessitating irrigation of fields for maize horticulturalists

The Evolution of the Curriculum of the Utah State Agricultural College

The chief purpose of this work is to trace the development of the curriculum of the Utah State Agricultural College from the establishment of the institution to the present time, with emphasis upon the forces shaping it. These forces have been active since colonial times, and in them lies the explanation for much of what the college is today

The role of technology education in selected Iowa elementary schools

http://www.worldcat.org/oclc/2586040

REQUIREMENTS FOR PROLONGED SUPPRESSION OF AN IDIOTYPIC SPECIFICITY IN ADULT MICE

The appearance of an idiotypic specificity, present in anti-p-azophenylarsonate (anti-Ar) antibodies of all immunized A/J mice, ran be suppressed in adult mice by prior administration of an IgG fraction of rabbit antiidiotypic (anti-D) antiserum; anti-Ar antibodies arise but are of different idiotype. Prolonged suppression was observed in earlier experiments, but antigen was first administered to adult mice only 2 wk or 9 wk after anti-D antibodies; subsequent escape from idiotypic suppression could have been masked by the capture of antigen by large numbers of memory cells having receptors of a different idiotype. In the present experiments antigen was first administered at intervals up to 22 wk after the antiidiotypic antibody. Suppression was maintained for 6 wk in all mice and for 5 mo in about half the mice tested. It thus appears that suppression of idiotype is less reversible if antigen is administered soon after the antiidiotypic antibody. The data suggest that escape from suppression is attributable to the generation of new precursor cells rather than to reactivation of suppressed cells. The minimum dosage of antiidiotypic IgG required for effective suppression was about 2 mg. The subcutaneous or intraperitoneal routes of inoculation of antiidiotypic IgG were equally effective. When antiidiotypic antibody was administered 3 days after antigen no suppressive effects were observed. There was partial suppression when antiidiotypic antibody was injected on the same day as the antigen. Fab' and F(ab')2 fragments of antiidiotypic IgG had no suppressive effect. Quantitative measurements revealed no significant differences among control and suppressed mice with respect to total concentration of precipitable anti-Ar antibodies produced

Infiltration/cure modeling of resin transfer molded composite materials using advanced fiber architectures

A model was developed which can be used to simulate infiltration and cure of textile composites by resin transfer molding. Fabric preforms were resin infiltrated and cured using model generated optimized one-step infiltration/cure protocols. Frequency dependent electromagnetic sensing (FDEMS) was used to monitor in situ resin infiltration and cure during processing. FDEMS measurements of infiltration time, resin viscosity, and resin degree of cure agreed well with values predicted by the simulation model. Textile composites fabricated using a one-step infiltration/cure procedure were uniformly resin impregnated and void free. Fiber volume fraction measurements by the resin digestion method compared well with values predicted using the model

SUPPRESSION OF IDIOTYPIC SPECIFICITIES IN ADULT MICE BY ADMINISTRATION OF ANTIIDIOTYPIC ANTIBODY

It has previously been shown that there are extensive idiotypic cross-reactions among antiphenylarsonate antibodies of A/J mice. The present work indicates that administration, into normal, adult A/J mice, of rabbit antiidiotypic antibody directed to A/J antiphenylarsonate antibody suppresses almost completely the subsequent production of antibody of the corresponding idiotype. No effect was noted on the formation of antibodies to the protein carrier or of antiphenylarsonate antibody of a different idiotype. The data are consistent with central suppression of production of the idiotypic antibody mediated through interaction with immunoglobulin receptors on lymphocytes

The Ambiguities of Home: The Shifting Meanings of Learning Across Spaces, Places, and Identities

This symposium explores how ‘home’ is a volatile mix of yearning and loss, of being at home or searching for it, and how it deeply affects all of us in a growingly interdependent as well as fragmented globalized world

Analytical modeling and sensor monitoring for optimal processing of advanced textile structural composites by resin transfer molding

A two-dimensional model of the resin transfer molding (RTM) process was developed which can be used to simulate the infiltration of resin into an anisotropic fibrous preform. Frequency dependent electromagnetic sensing (FDEMS) has been developed for in situ monitoring of the RTM process. Flow visualization tests were performed to obtain data which can be used to verify the sensor measurements and the model predictions. Results of the tests showed that FDEMS can accurately detect the position of the resin flow-front during mold filling, and that the model predicted flow-front patterns agreed well with the measured flow-front patterns

Returning home: heritage work among the Stl'atl'imx of the Lower Lillooet River Valley

This article focusses on heritage practices in the tensioned landscape of the Stl’atl’imx (pronounced Stat-lee-um) people of the Lower Lillooet River Valley, British Columbia, Canada. Displaced from their traditional territories and cultural traditions through the colonial encounter, they are enacting, challenging and remaking their heritage as part of their long term goal to reclaim their land and return ‘home’. I draw on three examples of their heritage work: graveyard cleaning, the shifting ‘official’/‘unofficial’ heritage of a wagon road, and marshalling of the mountain named Nsvq’ts (pronounced In-SHUCK-ch) in order to illustrate how the past is strategically mobilised in order to substantiate positions in the present. While this paper focusses on heritage in an Indigenous and postcolonial context, I contend that the dynamics of heritage practices outlined here are applicable to all heritage practices

Festchrift: A Collection of Essays on Architectural History

A collection of essays on architectural history prepared by the Northern Pacific Coast Chapter Society of Architectural Historians dedicated to Professor Marion Dean Ross, chapter founder, on the occasion of his 65th birthday