Index Catalog // ScholarsArchive@OSU

Aquatic community responses to drought disturbance: experimental manipulations of top predator extinctions and stream drying

Creator:: Boersma, Kate S.
Abstract:: Although it is generally assumed that the intensifying abiotic environment is the primary effect of drought on aquatic organisms, drought-induced top predator extinctions may be an important underlying mechanism. I used manipulative experiments to disentangle the impacts of drying and top predator extinctions on arid-land aquatic invertebrate communities. I then...
Resource Type:: Dissertation
Full Text:: , 2013. Title: Aquatic community responses to drought disturbance: Experimental manipulations of top

Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA

Creator:: Nelson, Peter R.
Abstract:: Lichens play many important roles in subarctic terrestrial ecosystems by fixing nitrogen, colonizing rock and gravel, stabilizing otherwise bare soil, adding significantly to vegetation biodiversity and serving as the primary food for caribou in the winter. In these chapters, I analyzed lichen community and ecological trait structure along environmental gradients,...
Resource Type:: Dissertation
Full Text:: degree of Doctor of Philosophy in Botany and Plant Pathology presented on October 2, 2013. Title

Carbon cycle variability during the last millennium and last deglaciation

Creator:: Bauska, Thomas K.
Abstract:: The exchange of carbon on earth is one of the fundamental processes that sustains life and regulates climate. Since the onset of the Industrial Revolution, the burning of fossil fuels and anthropogenic land conversion have altered the carbon cycle, increasing carbon dioxide in the atmosphere to levels that are unprecedented...
Resource Type:: Dissertation
Full Text:: presented on October 8, 2013. Title: Carbon Cycle Variability during the Last Millennium and Last

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

Creator:: Keiluweit, Marco
Abstract:: Intimate associations with reactive metal species permanently protect soil organic matter (SOM) from microbial access and oxidation, contributing to the build-up of organic carbon (C) stocks in soils. It is increasingly recognized, however, that such associations can be reversible and that reactive metal species might even facilitate the oxidation of...
Resource Type:: Dissertation
Full Text:: presented on October 25, 2013 Title: Assessing the Role of Reactive Metal Species in Soil Organic

Patterns of carbon storage within a mature northern highbush blueberry production system

Creator:: Nemeth, Denise Alexandra
Abstract:: The objectives of this study were to: 1) determine how organic matter (incorporated vs. surface mulch) and nitrogen fertilization rate impact northern highbush blueberry (Vaccinium corymbosum L.) plant biomass, carbon accumulation, plant losses and allocation, and mycorrhizal infection in mature plants, and 2) determine the magnitude of carbon fluxes (carbon...
Resource Type:: Dissertation
Full Text:: on June 10 2013. Title: Patterns of Carbon Storage Within a Mature Northern Highbush Blueberry

Costs, benefits, and participation in online knowledge sharing in communities of practice for faculty

Creator:: Ostrander, Jane Christina
Abstract:: Community college and university faculty members changing their practice of teaching have reported benefits to participating in peer support within communities of practice that offer an online knowledge sharing space. The ability of such online knowledge sharing to provide opportunities for collaborative knowledge building has made fostering a viable online...
Resource Type:: Dissertation
Full Text:: in Education presented on October 2, 2013. Title: Costs, Benefits, and Participation in Online

Design techniques for low-power multi-GS/s analog-to-digital converters

Creator:: Jiang, Tao
Abstract:: Ultra-high-speed (>10GS/s), medium-resolution (5~6bit), low-power (<50mW) analog-to-digital converter can find it application in the areas of digital oscilloscopes and next-generation serial link receivers. There are several challenges to enable a successful design, however. First, the time-interleaved architecture is required in order to achieve over 10GS/s sampling rate, with the trade-off...
Resource Type:: Dissertation
Full Text:: Computer Engineering presented on June 10, 2013. Title: Design Techniques for Low-Power Multi-GS/s

Gene networks during cardiogenesis and skeletal myogenesis

Creator:: Ma, Hsiao-Yen
Abstract:: Organismal development requires a precisely orchestrated transcriptional program to correctly deploy genetic information into the genome. This process requires sophisticated gene regulatory networks at multiple spatial and temporal levels from early embryonic development to adult physiological conditions. Molecular differences that define cell types are set up during the pattern formation...
Resource Type:: Dissertation
Full Text:: Pharmacy presented on October 16, 2013 Title: Gene Networks During Cardiogenesis And Skeletal

Water content and electrical conductivity profile measurements for dispersive media using enhanced time domain and frequency domain models

Creator:: Flugstad, Benjamin A.
Abstract:: Water conservation and water quality are rapidly increasing in importance in all areas of the world. The ability to accurately measure soil water content and salinity, over a wide variety of conditions, is key to meeting this need. A set of forward prediction models and waveform interpretation algorithms to extract...
Resource Type:: Dissertation
Full Text:: Biological and Ecological Engineering presented on June 10, 2013. Title: Water Content and Electrical

Solution of the 2D quasi-diffusion low-order equations using a coupled nodal/finite volume discretization in Cartesian and hexagonal geometry

Creator:: Nes, Razvan
Abstract:: An important improvement in the area of reactor core neutronic modeling is the development and use of the methods based on "quasi-diffusion" (QD) low-order equations. This family of methods takes into account the transport exactly using "functionals" computed by solving transport equations, and is amenable to solution with a variety...
Resource Type:: Dissertation
Full Text:: HTGR fuel assembly (Sci, 2009), (Wha, 2013). 10 (a

ScholarsArchive@OSU

Aquatic community responses to drought disturbance: experimental manipulations of top predator extinctions and stream drying

Lichen communities and caribou habitat in Denali National Park and Preserve, Alaska, USA

Carbon cycle variability during the last millennium and last deglaciation

Assessing the role of reactive metal species in soil organic matter cycling using chemical imaging

Patterns of carbon storage within a mature northern highbush blueberry production system

Costs, benefits, and participation in online knowledge sharing in communities of practice for faculty

Design techniques for low-power multi-GS/s analog-to-digital converters

Gene networks during cardiogenesis and skeletal myogenesis

Water content and electrical conductivity profile measurements for dispersive media using enhanced time domain and frequency domain models

Solution of the 2D quasi-diffusion low-order equations using a coupled nodal/finite volume discretization in Cartesian and hexagonal geometry

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