Students struggle with the concept of functions and the notation associated with it in various mathematical contexts. This thesis investigates student understanding of function notation through their generalization of single variable functions to multivariable functions in a variety of situations. Semi-structured student interviews were conducted and analyzed through a framework...
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Eric Weber
Students struggle with the concept of functions and the notation associated with it
Some evidence suggests a connection between outdoor recreation participation and
stronger environmental worldviews. This study finds little evidence supporting
participation in outdoor recreation activities and stronger environmental worldviews and
some evidence supporting a weak connection between appreciative outdoor recreation
and stronger environmental worldviews. Additionally, the study documents greater
participation in...
This research explores how an agriculture-based community in the Crooked River Watershed of Central Oregon responds to a series of water resource and environmental challenges, some associated with projected climate change, amid increasing pressure to change management practices to better accommodate environmental needs. A key part of this research assesses...
Mycobacterium abscessus (MAB) is an opportunistic pathogen responsible for infections in immunocompromised or immunosuppressed patients. Even with long-term treatment with multiple antibiotics, MAB pulmonary infections have high rates of treatment failure. Within the host, MAB is phagocytosed by key innate immune cells macrophages. The TLR2 and TLR4 are two critical...
Low-Income urban African American (LIU-AA) youth are at high risk for HIV/STIs and adolescent pregnancy. Sexual health websites (SHWs) offer an inexpensive, easy-to-disseminate, and potentially highly-accessible method of improving sexual health knowledge, awareness, and help-seeking. The present study examined engagement regarding sexual health websites for at-risk, LIU-AA youth. We conducted...
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M. M. Dolcini, Committee Member, representing College of Public Health and
Human Sciences
Immature T cells, known as thymocytes, undergo development through successive stages in the thymus and the periphery to become functional mature T cells. These stages are regulated by sequence specific transcription factors (SSTFs). Two such SSTFs, BCL11B and TCF-1, are both known master regulators of thymopoiesis, which is also known...
Host-selective toxins (HSTs) secreted by the pathogenic isolate of Pyrenophora tritici-repentis, BFP, are major pathogenicity factors in tan spot disease of wheat. Along with characterized HSTs such as Ptr ToxA (ToxA), BFP secretes at least two more uncharacterized toxic components. In an attempt to identify these additional components, 12 candidate...
Microplastics (<5mm) are a ubiquitous environmental pollutant that have the potential to cause significant harm in many fish species. Therefore, understanding the quantities at which they are being consumed by living organisms is crucial for characterizing risk. There are currently gaps in the microplastic literature regarding microplastic data from finfish...
Previous research on WWII veterans in their 70’s and 80’s has shown that positive and negative appraisals of military service mediate between combat exposure and PTSD symptoms in late life. This thesis extends this research in two ways, first by determining how these variables relate to functional health in later...
This investigation expands on earlier methods of using surface polarization reflection (SPR) to characterize the first few monolayers of a surface. Past research measured intensities of light reflecting off an SiO₂ optical flat inside a vacuum. Pressure of applied gas was changed to view a change in reflection. In an...
Food insecurity is a growing public health concern in Oregon. Those that are food insecure often develop strategies, such as reducing the size of meals, cutting out fruits, vegetables and meats or skipping meals entirely, to make food last. One group that is disproportionately affected by food insecurity is families....
Interest in organizational culture has grown enormously over the last twenty years and much
effort has gone into investigating the relationship between organizational culture and
performance. Because most research to date has focused on large organizations, we chose to
investigate the culture in a community bank undergoing a cultural transformation....
Pantoea vagans C9-1 (C9-1) is a biological control agent sprayed onto apple and pear trees during bloom for suppression of fire blight, a devastating bacterial disease caused by Erwinia amylovora. Prior bioinformatics studies of C9-1 focused on predicted phenotypes associated with the three native megaplasmids, pPag1, pPag2, and pPag3, and...
Growth models developed by Pennsylvania State University (Penn State) extension
services for Holstein and Jersey heifer height and weight were evaluated using OSU dairy
herd heifer data. The purpose of this study was to determine the ability of the models to
predict heights and weights of heifers in the OSU...
Various flavonoid-rich plant extracts have shown efficacy in the treatment of diabetes. Although it is often assumed that dietary flavonoids exert biological antioxidant effects, it is possible that the observed effects work in carbohydrate metabolism. In this study we evaluated the effect of catechins and catechin containing extracts on α-amylase...
An experimental framework for investigation of the effects of Micro Pin Fin Arrays (MPFA) on the fuel oxidation efficiency of catalytic combustion is presented in this thesis. Complete combustion of the fuel is essential for operation at maximum efficiency and high standards of environmental cleanliness desired in existing microscale combustion...
With cannabis use increasing globally, it is important to understand its acute and chronic impacts on human physiology and behavior. It is proposed that cannabis use is linked to impairments in emotion processing, and brain regions that underlie these processes. The purpose of this review paper is to provide the...
Tightness-looseness (TL) is a cultural construct that measures the level of social norms present in a community, and the level of scrutiny of deviance from these norms. This construct offers a unique foundation for investigating how norms influence behavioral processes. Research in TL is relatively young, creating a frontier of...
Various flavonoid-rich plant extracts have shown efficacy in the treatment of diabetes. Although it is often assumed that dietary flavonoids exert biological antioxidant effects, it is possible that the observed effects work in carbohydrate metabolism. In this study we evaluated the effect of catechins and catechin containing extracts on α-amylase...
The Viennese waltz is widely recognized as one of the most ubiquitous genres in classical piano literature. Despite the common characteristics that most of these waltzes share ---light, melodious themes, three-four meter, and varied tempos --- there is a large distinction between its earlier and later forms. Curiosity about its...