Index Catalog // ScholarsArchive@OSU

A Linear Mixed Model Framework for Spatio-Temporal Random Processes using the Separable and Product-Sum Covariance Structures

Creator:: Dumelle, Michael J.
Abstract:: We describe spatio-temporal random processes using linear mixed models and discuss estimation, inference, and prediction under this formulation. We show how many commonly used covariances are special cases of this more general framework and pay special attention to the separable and product-sum covariances. The linear mixed model formulation facilitates straightforward...
Resource Type:: Dissertation
Full Text:: , v, indicated on the left side of the right open bracket

Modeling Density Dependence in the Presence of Measurement Error

Creator:: Payton, Quinn
Abstract:: Density dependence is an ecological concept concerning the mechanisms of change in the size of a population. The inability to census ecological populations confounds approaches to identify and quantify the level of density dependence. Statistical tests which ignore the presence of measurement error tend to result in misspeci fied type...
Resource Type:: Dissertation
Full Text:: (nt) (Thomson et al., 2009). With this simple relationship in mind, early modeling involved plotting

Navigating food and foes in the savanna : nutrition, infections and spatial ecology in African buffalo

Creator:: Combrink, Hendrik J.
Abstract:: The intricate relationship between wildlife health and the quality of their environment is well established, with technological advances increasing our understanding and aiding the unraveling of underlying mechanisms. Large herbivores require forage of sufficient quality to maintain their condition to reproduce and survive, all while warding off parasites and predators...
Resource Type:: Dissertation
Full Text:: , A. F. Russell, J. Zhang, G. E. Hill, and S. V. Edwards (2011). “Rapid evolution of disease

Estimation and modeling of selected forest metrics with lidar and Landsat

Creator:: Strunk, Jacob L.
Abstract:: Lidar is able to provide height and cover information which can be used to estimate selected forest attributes precisely. However, for users to evaluate whether the additional cost and complication associated with using Lidar merits adoption requires that the protocol to use lidar be thoroughly described and that a basis...
Resource Type:: Dissertation
Full Text:: interpretation of ERTS data for forest management. Lohr, S.L. 2009. Sampling: design and analysis. Thomson

Predator Conservation and Trophic Ecology

Creator:: Wolf, Christopher
Abstract:: Many of Earth’s terrestrial large carnivore species are threatened with extinction. As a result, some of the ecological effects associated with these species may be lost. With the goal of furthering large carnivore conservation research, I conduct three global scale analyses involving these species. First, I explore prey depletion as...
Resource Type:: Dissertation
Full Text:: Thomson Reuters’ Web of Science database for articles using their scientific names and built prey lists

A Normal Approximation to N-mixture Models with Applications in Large Abundance Estimation and Disease Surveillance

Creator:: Brintz, Benjamin J.
Abstract:: N-mixture models provide a structure for making inference about a local population size while accounting for imperfect detection. Using a binomial likelihood, they assume prior distributions on the size parameters and then integrate those parameters out of the full likelihood. For large population sizes, the established frequentist methods have exhibited...
Resource Type:: Dissertation
Full Text:: ] = V (ni) = λ · p and cov(ni,t ,ni,u) = λ · p2 so the parameters are estimable, most intuitively, if

Hydrocortisone permeation study using a synthetic membrane, mouse skin and an epiderm cultured skin, Preparation of orally disintegrating tablets of melatonin and acetaminophen, Pharmacokinetics of terbinafine in penguins

Creator:: Le, Hang Thi
Abstract:: The first project of this thesis is an in vitro study. This study was performed with 8 hydrocortisone topical products on the market for the purpose of comparing one Tec Lab product, a Corticool gel, to the other seven common products on the market. The permeation of these products was...
Resource Type:: Dissertation

Spatial graphical models with discrete and continuous components

Creator:: Che, Xuan
Abstract:: Graphical models use Markov properties to establish associations among dependent variables. To estimate spatial correlation and other parameters in graphical models, the conditional independences and joint probability distribution of the graph need to be specified. We can rely on Gaussian multivariate models to derive the joint distribution when all the...
Resource Type:: Dissertation
Full Text:: within multivariate systems. A graphical model, or a graph, G, is defined by G “ pV,Eq, with V being its

Analysis of Carbon-14 Transport from a Contaminated Groundwater Source

Creator:: Napier, Jonathan Bamberger
Abstract:: Radioecology observes the movement of radioactive isotopes throughout the environment. For radioecology, locations of study are limited to areas accidentally contaminated from a number of sources. The Chalk River Laboratories of Atomic Energy of Canada Limited have stored low level waste since the mid 1940s. In certain instances, the wastes...
Resource Type:: Dissertation
Full Text:: and carbon-14. The additional neutrons reduces the velocity (v) of molecules with heavier isotopes

Invasive Pacific Lionfish Alters Native Community Interactions on Atlantic Coral Reefs

Creator:: Kindinger, Tye L.
Abstract:: Biological invasions have been identified as one of the prominent drivers of global environmental change. In particular, invasive predators typically have substantial negative effects on populations of native prey, even driving species to extinction in extreme cases. However, beyond direct predatory effects, little is understood regarding the specific mechanisms by...
Resource Type:: Dissertation
Full Text:: understanding the ecological effects of invaders. Biol Invasions 1:3–19 Pereira HM, Leadley PW, Proença V

ScholarsArchive@OSU

A Linear Mixed Model Framework for Spatio-Temporal Random Processes using the Separable and Product-Sum Covariance Structures

Modeling Density Dependence in the Presence of Measurement Error

Navigating food and foes in the savanna : nutrition, infections and spatial ecology in African buffalo

Estimation and modeling of selected forest metrics with lidar and Landsat

Predator Conservation and Trophic Ecology

A Normal Approximation to N-mixture Models with Applications in Large Abundance Estimation and Disease Surveillance

Hydrocortisone permeation study using a synthetic membrane, mouse skin and an epiderm cultured skin, Preparation of orally disintegrating tablets of melatonin and acetaminophen, Pharmacokinetics of terbinafine in penguins

Spatial graphical models with discrete and continuous components

Analysis of Carbon-14 Transport from a Contaminated Groundwater Source

Invasive Pacific Lionfish Alters Native Community Interactions on Atlantic Coral Reefs

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search