Digital Commons Network^™

Development And Validation Of Forest Habitat Models In The Uinta Mountains, Utah, Tracey S. Frescino

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A significant question currently facing environmental managers is how to accurately and efficiently quantify forest diversity and resources. Numerous studies have demonstrated the use of modern spatial analytical tools, such as geographical information systems (GIS), remote sensing devices, and statistical models for predicting the distribution of dominant vegetation cover types. This study examines the ability of generalized additive models (GAMs) to delineate structural diversity in forested ecosystems (specifically the Uinta Mountain Range in Utah) using GIS tools and satellite spectral data, and analyzes the effect of including different forms of satellite data in model construction (i.e., Landsat thematic mapper (TM), …

Ammonium And Nitrate Effects On Growth, Development And Nutrient Uptake Of Hydroponic Wheat, Thomas M. Hooten

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The long-term effects of low and high NH₄⁺/ NO₃^- uptake ratios in a system with rigorous control of pH and nitrogen concentration are poorly understood. In two replicate studies, two cultivars of wheat (Triticum aestivum) were grown to maturity with three NH₄⁺/ NO₃^- ratios in hydroponic solution: 0/100, 25/75, and 85/15%. Nitrogen was controlled at ample levels throughout the 70-d life cycle and pH was controlled at 5.8 ± 0.2. An equimolar ratio of NH₄⁺ to Cl^- was used to facilitate charge balance. Nitrogen consumption …

Essays On The Impact Of Foreign Aid On Economic Growth And Development: The Case Of Jordan, Jamal G. Husein

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This dissertation examines the role of foreign aid in economic growth and development of Jordan. The flow of foreign capital takes two main forms: private foreign investment, mostly foreign direct investment by large multinational corporations, and public development assistance (foreign aid) from both individual national governments and multinational donor agencies. The distinguishing characteristic of foreign aid is the concessional element. In this dissertation, recent techniques and advances in time-series analysis are used in the empirical section of Chapters 2 and 3, i.e., vector autoregression (VAR), impulse response functions, and variance decompositions. In the fourth chapter, we use a nonlinear three-stage …

Therapy Videotape Presentation For Eating Disorder Clients: Development And Evaluation, Benita J. Quakenbush

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Eating disorder clients show low motivation, poor follow-through, and inordinate premature dropout rates in treatment. Earlier studies support the use of pretherapy training to help clients understand the tasks and challenges of therapy. However, a pretherapy intervention, such as showing prospective clients a video that outlines recovery issues and themes, had not yet been developed specifically for the prevalent, recalcitrant problem of eating disorders. Thus, of particular interest to clinicians who treat eating disorders may be the development of a theoretically sound, pretherapy videotape that outlines recovery issues.

One of the purposes of this study was to review prior investigations …