Index Catalog // ScholarsArchive@OSU

Special Nuclear Material Classification and Mass Content Estimation Using Temporal Gamma-Ray Spectroscopy and Machine Learning Methods

Creator:: Curtis, Jessica R.
Abstract:: Improving the methods used for the detection and estimation of fissile material mass content is essential to nuclear security and safeguards to ensure special nuclear material (SNM) accountability, control, safety and security. With the continued expansion of the nuclear industry and the need for safe management of spent fuel, improving...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Jessica R. Curtis

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Creator:: Alder, Jay R.
Abstract:: This thesis presents the results of a formal evaluation of a new AOGCM, GENMOM, demonstrating its ability to simulate present-day climate and ENSO dynamics. The model is applied to simulate climate for the Last Glacial Maximum, deglacial, and Holocene time periods. The model output is evaluated against the best available...
Resource Type:: Dissertation
Full Text:: THE DISSERTATION OF Jay R. Alder for the degree of Doctor of Philosophy in Geography presented on

Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

Creator:: Mangla, Seema
Abstract:: Successful ecosystem restoration requires an understanding of the ecological processes directing succession. One of the challenges in the semi-arid grasslands of western United States is replacement of native species by invasive annual grasses. Solutions to this problem require identifying and manipulating ecological processes that direct succession to favor desired vegetation....
Resource Type:: Dissertation
Full Text:: : _______________________________________________________ Roger L. Sheley Steven R. Radosevich

Beaches, Wine, and Weed: Economic Implications of Land Use Change in Oregon

Creator:: Beasley, W. Jason
Abstract:: The economic analysis of land use decisions provides insight into incentive structures faced by landowners and the impacts of landowner decisions on others. Qualifying and quantifying these incentives and impacts offers insight into the relevant characteristics of decision-making. In turn, this allows the researcher to model and predict land use...
Resource Type:: Dissertation
Full Text:: author is particularly indebted to his major advisor, Dr. Steve Dundas, for continued guidance and

Stability of reporter gene expression and RNAi in transgenic poplars over multiple years in the field under vegetative propagation

Creator:: Li, Jingyi
Abstract:: Stable expression of transgenes is required for commercial uses of genetically engineered trees. To better understand the stability of transgene expression under field conditions, we studied transgene expression and RNA interference (RNAi)-induced transgene suppression in 2,480 transgenic poplars (460 transgene insertion events) over three years. Stability of expression was assessed...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________________ Steve H. Strauss

The Experiences of Students Who Complete in a Successful Distance Learning Course

Creator:: Smith, Steve
Abstract:: Background: Prior research has shown that distance learning courses have higher failure rates at community colleges then equivalent face-to-face to courses. There are a few programs and courses, however, that consistently achieve completion rates as high as or higher than their equivalent face-to-face courses. The research to date has not...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Steve Smith for

A Contingency-Based Evaluation for Beaver Restoration of Salmon Habitat in Oregon Coastal Streams

Creator:: Stevenson, John R.
Abstract:: Streams across the western United States are impaired from human alterations that have reduced freshwater habitat by simplifying channel complexity and disconnecting floodplains (Knox et al., 2022; Waples et al., 2008; Wohl, 2014). Climate change is likely to continue exacerbating these risks by warming summer surface stream temperatures (Crozier et...
Resource Type:: Dissertation
Full Text:: Dunham and Jimmy Taylor and committee members Steve Wondzell, Clint Epps and Ryan Contreras. Jason and

The ecological legacy of Indian burning practices in southwestern Oregon

Creator:: Carloni, Kenneth R.
Abstract:: Two research questions are posed: (1) How have ecosystem conditions changed through time in southwestern Oregon? (2) How have culture-driven and climate-driven processes contributed to ecosystem change in southwestern Oregon? A brief introduction to the Little River study area is followed by a cultural and ecological history of the watershed....
Resource Type:: Dissertation
Full Text:: THE DISSERTATION OF Kenneth R. Carloni for the degree of Doctor of Philosophy in Forest Science

A Rapid β-/γ Autoradiographic Imaging Method for Post-detonation Nuclear Forensics and Radiological Emergency Response

Creator:: Foley, Ari A. R.
Abstract:: In a radiological emergency scenario, the capability to rapidly visualize radiation emitted from debris, contamination, or absorbed in biological samples, while visualizing the non-radioactive (or “conventional” image) features within a ﬁeld of view, will provide critical information to support optimization of further analysis, sample collection, and decision making. This research...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Ari A. R. Foley for the

Predicting mechanical instability of a cylindrical plate under axial flow conditions

Creator:: Marcum, Wade R.
Abstract:: Five U.S. high performance research reactors (HPRRs) are currently part of an international nonproliferation program with the objective of ultimately converting their highly enriched uranium (HEU) fuel to a new high density, low enriched uranium (LEU) fuel while still maintaining their reactor kinetic and thermal hydraulic performance. A uranium-molybdenum (U-Mo)...
Resource Type:: Dissertation
Full Text:: DISSERTATION OF Wade R. Marcum for the degree of Doctor of Philosophy in Nuclear Engineering presented on

ScholarsArchive@OSU

Special Nuclear Material Classification and Mass Content Estimation Using Temporal Gamma-Ray Spectroscopy and Machine Learning Methods

Simulating past, present, and future changes in ENSO : a model evaluation and data-model comparison

Directing ecological succession : the role of competition in restoring semi-arid grasslands dominated by invasive plants

Beaches, Wine, and Weed: Economic Implications of Land Use Change in Oregon

Stability of reporter gene expression and RNAi in transgenic poplars over multiple years in the field under vegetative propagation

The Experiences of Students Who Complete in a Successful Distance Learning Course

A Contingency-Based Evaluation for Beaver Restoration of Salmon Habitat in Oregon Coastal Streams

The ecological legacy of Indian burning practices in southwestern Oregon

A Rapid β-/γ Autoradiographic Imaging Method for Post-detonation Nuclear Forensics and Radiological Emergency Response

Predicting mechanical instability of a cylindrical plate under axial flow conditions

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