Index Catalog // ScholarsArchive@OSU

Construction of Anomaly Scores and Probabilities using Random Sampling : A New Score, Efficient Computation, and Threshold Selection.

Creator:: Zongo, Kalbi F.
Abstract:: Anomaly detection is the task of identifying observations (points) that differ from the majority of other points, which requires some measure of difference, or distance. Many anomaly detection methods rely on “implicit distance” measures: rather than directly calculating an explicitly defined distance, these approaches quantify a point’s “abnormality” by examining...
Resource Type:: Dissertation
Full Text:: Anomaly Scores and Probabilities using Random Sampling: a New Score, Efficient Computation, and Threshold

New applications and emerging contaminants : developing silicone passive sampling devices for environmental and novel monitoring applications

Creator:: O'Connell, Steven G.
Abstract:: Passive sampling is a popular technology for environmental monitoring, and silicone is an ideal choice for a variety of passive sampling applications. The silicone work described here encompasses laboratory and field studies that demonstrate the use of this polymer in novel environments, for new applications, and for emerging compounds. Unique...
Resource Type:: Dissertation
Full Text:: Silicone Passive Sampling Devices for Environmental and Novel Monitoring

Development of innovative applications for passive sampling devices : monitoring bioavailability, risk from exposure and environmental mixture toxicity

Creator:: Allan, Sarah E.
Abstract:: Chemicals must be bioavailable for there to be a potential for exposure and consequent risk to human or environmental health. Passive sampling devices (PSDs) are used to quantify the time-integrated concentration of bioavailable contaminants. We demonstrate that PSDs can be paired with the zebrafish developmental toxicity bioassay to produce site-specific,...
Resource Type:: Dissertation
Full Text:: Sampling Devices: Monitoring Bioavailability, Risk from Exposure and Environmental Mixture Toxicity

An analysis of the Diablo Canyon Power Plant Radiological Environmental Monitoring Program sampling results from the Cal Poly, San Luis Obispo, dairy herd milk, post-Fukushima

Creator:: Treinen, Richard M.
Abstract:: This study focuses on iodine-131 detected in milk samples from the Dairy Science Unit at Cal Poly, San Luis Obispo, California following events at the Fukushima Dai-ichi Nuclear Power Plant in March of 2011. The samples were collected as part of the Diablo Canyon Nuclear Power Plant (DCPP) Radiological Environmental...
Resource Type:: Masters Thesis
Full Text:: Analysis of the Diablo Canyon Power Plant Radiological Environmental Monitoring Program Sampling Results

Developing a basis for characterizing precision of estimates produced from non-probability samples on continuous domains

Creator:: Cooper, Cynthia
Abstract:: This research addresses sample process variance estimation on continuous domains and for non-probability samples in particular. The motivation for the research is a scenario in which a program has collected non-probability samples for which there is interest in characterizing how much an extrapolation to the domain would vary given similarly...
Resource Type:: Dissertation
Full Text:: could represent the response on the domain of interest. This excludes any hot- spot monitoring

Comparison between lichen, conifer needles, resin-based passive air sampling devices (PASDs), and snow to monitor semi-volatile organic compounds (SOCs) in the atmosphere

Creator:: Schrlau, Jill E.
Abstract:: The purpose of this research was to compare four different media that were used to monitor SOC atmospheric concentrations in remote ecosystems. The accumulation of semi-volatile organic compounds, including pesticides, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs), was investigated in lichen, 2-year old conifer needles, resin-based passive air sampling...
Resource Type:: Masters Thesis
Full Text:: sampling system for monitoring persistent organic pollutants in the atmosphere. Environmental Science

The Gas Exchange Threshold-Lactate Threshold Relationship Across Cycling Fitness Levels

Creator:: Seipel, Aaron
Abstract:: Endurance athletes set the intensities of training sessions using blood lactate data from a maximal graded exercise test. Specifically, these intensities are set as a percentage of heart rate (HR) at lactate threshold (LT). Often, however, gas exchange threshold (GET) data is used as a predictor of LT as it...
Resource Type:: Honors College Thesis
Full Text:: various different threshold criteria. It is more appropriate, however, to refer to these thresholds by

Propensity score adjustments using covariates in observational studies

Creator:: Yang, Daniel K.
Abstract:: In this thesis we develop a theoretical framework for the identification of situations where the equal frequency (EF) or equal variance (EV) subclassification may produce lower bias and/or variance of the estimator. We conduct simulation studies to examine the EF and EV approaches under different types of model misspecification. We...
Resource Type:: Dissertation
Full Text:: work on real surveys and sampling problems in the Survey Research Center. Without her unreserved

Perceptual thresholds for foot slipping in animated characters

Creator:: Strawn, Jordan J.
Abstract:: The computer game industry continues to progress toward realistic-looking character motion. However, even in state-of-the-art games, the use of motion capture data in character animation may result in errors such as “foot slipping,” where the feet do not match up with the floor properly during translation. Various algorithms have been...
Resource Type:: Honors College Thesis
Full Text:: Jordan Strawn Perceptual Thresholds for Foot

Behavioral thresholds in mixtures of sand and clay

Creator:: Simpson, Daniel Corder
Abstract:: Nearly all soils are comprised of mixtures of coarse and fine particles. Behavior under mechanical and thermal loading of soil is strongly influenced (and in some cases, governed) by the ratio of coarse to fine particles. A better understanding of the fundamental behavior of soil mixtures will provide insight to...
Resource Type:: Masters Thesis
Full Text:: mixtures to verify identified threshold fines contents and used to unify observed thresholds. 3

Foreign direct investment and productivity : financial openness thresholds

Creator:: Kabalyk, Maria
Abstract:: The last two decades have witnessed a triumph of free market policies in many developing countries and thus an increase in trade and financial openness. While economic theory provides a solid justification of the fact that trade and financial openness for a small economy with perfectly competitive markets improve resource...
Resource Type:: Masters Thesis
Full Text:: Openness Thresholds 3.2.1 Model Specification………………………………………. 15 3.2.2 Threshold Analysis

Thresholds of uncertainty : radiation and responsibility in the fallout controversy

Creator:: Jolly, J. Christopher
Abstract:: The public controversy over possible health hazards from radioactive fallout from atomic bomb testing began in 1954, shortly after a thermonuclear test by the United States spread fallout world wide. In the dissertation, I address two of the fundamental questions of the fallout controversy: Was there a threshold of radiation...
Resource Type:: Dissertation
Full Text:: degree of Doctor of Philosophy in History of Science presented on May 30, 2003. Title: Thresholds of

‘Tis a Gift to be Simple : On Passive Sampling and Compatible Techniques for Reducing the Complexity of Environmental Mixtures

Creator:: Bergmann, Alan J.
Abstract:: Assessing the risk from exposure to a chemical mixture in the environment can seem prohibitively challenging. Most components of the mixture are not readily identifiable, chemicals may interact to cause other-than-additive toxicity, and the number of potential combinations of environmental contaminants is enormous. These challenges can make it seem impossible...
Resource Type:: Dissertation
Full Text:: monitoring 6 and hand wipes. 7 Silicone wristbands were recently introduced as personal passive sampling

Nonuniform Sampling Of Band-limited Functions

Creator:: Al-Hammali, Hussain Y.
Abstract:: In this thesis, we will study certain generalizations of the classical Shannon Sampling Theorem, which allows for the reconstruction of a pi-band-limited, square-integrable function from its samples on the integers. J. R. Higgins provided a generalization where the integers can be perturbed by less than 1/4, which includes nonuniform and...
Resource Type:: Dissertation
Full Text:: . Title: Nonuniform Sampling Of Band-limited Functions Abstract approved: Adel Faridani In this thesis

Moisture Monitoring of Cross Laminated Timber Building Components

Creator:: Schmidt, Evan L.
Abstract:: Cross laminated timber (CLT) is a relatively new engineered wood product that has elevated the prospects of utilizing wood as the primary structural material for mid and high rise buildings. The hygrothermal performance of CLT, however, is still not well understood at the material, assembly and building scales. A major...
Resource Type:: Masters Thesis
Full Text:: ............................................................................ 85 4.3 Sampling criteria and hygrothermal monitoring protocols

Quantifying the Geomorphic Response of Stage 0 Stream Restoration: A Pilot Project on Whychus Creek

Creator:: Scagliotti, Alex
Abstract:: It is generally accepted in stream ecology that habitat heterogeneity and patchiness at multiple scales increases ecosystem resilience through niche diversification. Heterogeneous stream habitats include a complex mosaic of hydraulic features, large woody debris, anabranches, substrata and channel forms - this complexity tends to increase as streams progress towards later...
Resource Type:: Capstone Project
Full Text:: monitoring schemes already being implemented on Whychus Creek (water quality, macroinvertebrate sampling

Nonuniform sampling problems in computed tomography

Creator:: Gratton, Larry A.
Abstract:: Two problems involving high-resolution reconstruction from nonuniformly sampled data in x-ray computed tomography are addressed. A technique based on the theorem for sampling on unions of shifted lattices is introduced which exploits the symmetry property in two-dimensional fan beam computed tomography and permits the reconstruction of images with twice the...
Resource Type:: Dissertation
Full Text:: Sampling Problems in Computed Tomography. Signature redacted for privacy. Abstract approved

A Homotopy Strategy for Accelerated Sampling

Creator:: Jensen, Andrew D.
Abstract:: Markov Chain Monte Carlo methods may be used to determine normalizations and moments of distributions. However, these methods may perform poorly when starting from distributions that have little overlap with the target. We develop a homotopy based iterative process of incremental importance sampling to normalize distributions when observations can only...
Resource Type:: Masters Thesis
Full Text:: Accelerated Sampling Abstract approved: Juan M. Restrepo Markov Chain Monte Carlo methods may be used to

A Methodological Approach for Structural Health Monitoring of Mass-Timber Buildings Under Construction

Creator:: Baas, Esther J.
Abstract:: As mass-timber building construction rises around the globe, there exists the need to verify the long-term, in-situ behavior and performance of these structural systems. Structural health monitoring (SHM), generally defined as a damage detection strategy consisting of a network of sensors, a data acquisition system, and algorithms for data analysis,...
Resource Type:: Masters Thesis
Full Text:: associated with sampling criteria for timber monitoring, how to clean and analyze data, and how to account

Mortality threshold for juvenile Chinook salmon (Oncorhynchus tshawytscha) in an epidemiological model of Ceratomyxa shasta

Creator:: Ray, R. Adam
Abstract:: The myxozoan parasite, Ceratomyxa shasta, is the most significant pathogen of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Klamath River, CA, USA. This parasite requires two hosts - a freshwater polychaete (Manayunkia speciosa) and a salmonid - to complete its life cycle. The complex life cycle and large geographic area...
Resource Type:: Masters Thesis
Full Text:: 24, 2009. Title: Mortality Threshold for Juvenile Chinook Salmon (Oncorhynchus tshawytscha) in an

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