Index Catalog // ScholarsArchive@OSU

Impacts of Reduced Tillage and Disturbance on Soil Health and Microbial Community Dynamics in Grass Seed Cropping Systems

Creator:: Zamora, Cesar G.
Abstract:: In Oregon perennial and annual grass seed cropping systems conservation management practices and their impacts on soil health and soil microbial community is not well understood. There is strong motivation to employ conservation tillage and other conservation practices to curb atmospheric carbon levels and improve soil health. However, the few...
Resource Type:: Masters Thesis

Network Analysis and Change-point Detection

Creator:: Xu, Jiarui
Abstract:: Analysis of observations on sequential events over time is common in real life. Sequential measurements over time describing the behavior of systems are usually called time series data, which have been collected in a wide range of disciplines. Over the years there have been multiple research areas in studying stochastic...
Resource Type:: Dissertation

An Agent-based Dynamic Network Model

Creator:: Yu, Jingtian
Abstract:: Agent-based models (ABM) are widely used in network data analysis, and due to their simple structures and sophisticated outcomes, they serve as good tools in understanding the dynamics in networks. In this thesis, we develop an agent-based dynamic network model, and show that it can replicate the expected degree distribution...
Resource Type:: Masters Thesis

Local Signal Detection on Irregular Domains with Spatially Varying Coefficient Model

Creator:: Zhang, Chengzhu
Abstract:: In areas such as spatial analysis and time series analysis, it is essential to understand and quantify spatial or temporal heterogeneity. In this dissertation, we focus on a spatially varying coefficient model, in which spatial heterogeneity is accommodated by allowing the regression coefficients to vary in a given spatial domain....
Resource Type:: Dissertation

Ecophylogenetic Characterization of the Gut Microbiome of At-risk Companion and Food Animals

Creator:: Kirchoff, Nicole S.
Abstract:: Agricultural and companion animals are integral to our way of life as they provide us with nourishment, financial resources, transportation, and companionship. However, pets, managed animals in the agricultural industry, as well as wild populations of food animals are all subject to health and mortality risks. The gut microbiome is...
Resource Type:: Dissertation

Measuring and Modeling the Structure of Coniferous Trees with Point Clouds Data

Creator:: Fang, Rong
Abstract:: Coniferous trees are a major North American crop that has been intensively managed for its commercial value, while also serving as critical habitat for abundant wildlife and as carbon sinks. Having diverse functions, North American temperate coniferous forests have become a research hotspot for numerous scientific studies aiming to integrate...
Resource Type:: Dissertation

On the Use of Baseline Values in Randomized Clinical Trials

Creator:: Castillo Roldan, Alejandra M.
Abstract:: In many scientific settings, investigators are interested in the effect of a new treatment. To have a point of comparison data is collected from patients before treatment groups are assigned. When seeking to test the presence of a significant treatment effect it may be unclear how baseline measurements should be...
Resource Type:: Masters Thesis

Strategies for Altering Energy Flux in Thalassiosira pseudonana Elucidated by Transcriptomics

Creator:: Pombrol, Michelle
Abstract:: Diatoms play a major role in ocean biogeochemical cycles and are important tools in bioengineering for natural products and nanotechnology. Diatoms and other algae growing at varying resource-limited growth rates allocate carbon to different metabolic pathways to optimize growth; however, the molecular mechanisms controlling these pathway gating strategies are not...
Resource Type:: Masters Thesis

An Overview of Multivariate Regression Analysis of Biological Data

Creator:: DeHart, Christopher M.
Abstract:: This study investigates methods of multivariate regression analysis and their applications to biological data. It provides an overview of methods of reduced rank regression and sparse multivariate regression, including their motivations, methods, and applications. It also implements a form of sparse regression known as Regularized Multivariate Regression for Identifying Master...
Resource Type:: Honors College Thesis

Developing Performance-Based Specifications to Improve the Fatigue Life of Asphalt Pavements in Oregon

Creator:: Sreedhar, Shashwath
Abstract:: Asphalt concrete fatigue cracking is recognized as a major distress mode in the U.S. The widespread nature of this distress and the data from agency Pavement Management Systems (PMS) suggest that it is an issue with asphalt mixture design and production processes and is not a problem specific to certain...
Resource Type:: Dissertation

ScholarsArchive@OSU

Impacts of Reduced Tillage and Disturbance on Soil Health and Microbial Community Dynamics in Grass Seed Cropping Systems

Network Analysis and Change-point Detection

An Agent-based Dynamic Network Model

Local Signal Detection on Irregular Domains with Spatially Varying Coefficient Model

Ecophylogenetic Characterization of the Gut Microbiome of At-risk Companion and Food Animals

Measuring and Modeling the Structure of Coniferous Trees with Point Clouds Data

On the Use of Baseline Values in Randomized Clinical Trials

Strategies for Altering Energy Flux in Thalassiosira pseudonana Elucidated by Transcriptomics

An Overview of Multivariate Regression Analysis of Biological Data

Developing Performance-Based Specifications to Improve the Fatigue Life of Asphalt Pavements in Oregon

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