Search results | J. Murrey Atkins Library

Title: Analysis of failure time data with missing and informative auxiliary covariates.
Author: Ghosh, Lipika
Date Created: 2011
Subjects--Topical: Statistics, Mathematics, Biometry
Description: In this dissertation we use Cox's regression model to failure time data with continuous informative auxiliary variables in the presence of a validation subsample. The work is motivated by a common problem of missing or mismeasured covariates in su...

Title: Analysis of semiparametric regression models for the cumulative incidence functions under the two-phase sampling designs.
Author: Lee, Unkyung
Date Created: 2016
Subjects--Topical: Statistics, Mathematics
Description: Competing risks often arise where more than one event compete with each other for a subject. The cumulative incidence function is a proper summary quantity for analyzing competing risks data. In epidemiologic cohort studies, case-cohort study desi...

Title: Best probability density function for random sampled data
Author: Jacobs, Donald J.
Date Created: 2009
Subjects--Topical: Statistics, Probabilities
Description: The maximum entropy method is a theoretically sound approach to construct an analytical form for the probability density function (pdf) given a sample of random events. In practice, numerical methods employed to determine the appropriate Lagrange ...

Title: Beyond the PCA : a comprehensive review of dimension reduction techniques
Author: Kenjale, Tanmay
Date Created: 2022
Subjects--Topical: Statistics, Dimension reduction (Statistics), Regression analysis
Description: Regression analysis is a key tool in modeling the relationship between predictor variables and the conditional mean of the response variable. However, as the number of predictors increases, existing estimation methods become challenging. Dimension...

Title: Boosting computational effectiveness in big spatial flow data analysis with intelligent data reduction
Author: Thill, Jean-Claude
Date Created: 2020
Subjects--Topical: Data reduction, Statistics
Description: One of the enduring issues of spatial origin-destination (OD) flow data analysis is the computational inefficiency or even the impossibility to handle large datasets. Despite the recent advancements in high performance computing (HPC) and the read...

Title: CUSTOMER ATTRITION MODELING AND FORECASTING
Author: Xu, Zehan
Date Created: 2019
Subjects--Topical: Statistics
Description: Customer relationship management has shown its critical role in the success of a company in today’s increasingly competitive service industry. While modern machine learning techniques are widely adopted due to their advantages in working with exte...

Title: Changes in Lysozyme flexibility upon mutation are frequent, large and long-ranged
Author: Jacobs, Donald J., Verma, Deeptak, Livesay, Dennis R.
Date Created: 2012
Subjects--Topical: Bioinformatics, Statistics
Description: We investigate changes in human c-type lysozyme flexibility upon mutation via a Distance Constraint Model, which gives a statistical mechanical treatment of network rigidity. Specifically, two dynamical metrics are tracked. Changes in flexibility ...

Title: Characterization of Firebrands Generated from Selected Vegetative Fuels in Wildland Fires
Author: Bahrani, Babak
Date Created: 2020
Subjects--Topical: Engineering, Statistics
Description: Wildland-Urban Interface (WUI) and Wildland fires cause damages to infrastructure and the environment, resulting in loss of life, property, and an increasing cost of mitigation. Firebrands are known as one of the leading fire spread mechanisms in ...

Title: Clean Power Plan, Dirty Politics: An Examination of State Reactions to Climate Regulation
Author: Withrow, Matthew
Date Created: 2017
Subjects--Topical: Statistics, Power resources
Description: While carbon emissions are widely believed to be contributing to climate change, the U.S. has done little to limit the massive amounts of carbon being introduced into the atmosphere by electricity producing power plants. The Clean Power Plan (CPP)...

Title: Combatting Ceiling Effects: Modeling High-Ability Student Growth Using Multilevel Tobit Regression
Author: Hujar, Julia
Date Created: 2022
Subjects--Topical: Educational tests and measurements, Gifted children--Education, Statistics
Description: Pressures associated with accountability testing have resulted in a narrowing of both the curriculum and pedagogy that does not meet the needs of high ability learners. This study proposed that either a different measurement (an above-level comput...

Title: Cross-Sectional and Time Series Analysis of Crime Rate Across North Carolina
Author: Johnson, Isabella
Date Created: 2022
Subjects--Topical: Statistics, Mathematics
Description: Unemployment rate reached an astronomical high in 2020 due to the Covid-19 pandemic.The media began reporting on increasing crime rates due to the unemployment rate rising. The Center for Disease Control (CDC) reported that over 81,000 drug overdo...

Title: Developing Data-Driven Approaches for Analyzing, Identifying, and Predicting Power System Outages
Author: Doostan, Milad
Date Created: 2019
Subjects--Topical: Electrical engineering, Statistics
Description: Outages that occur in power distribution systems can seriously endanger system operation in different ways. In recent years, with the explosion in data gathering within the smart grid framework, data analytics has emerged as a desirable tool in he...

Title: Distance Based Linear Regression Model And Its Application To Microbiome Association Studies
Author: Sheikhi Kiasari, Masoumeh
Date Created: 2021
Subjects--Topical: Mathematics, Statistics
Description: In the past few decades, pairwise distance based statistical methods have beendeveloped to identify spatial and/or temporal clusters of disease, study the association between the dissimilarity of ecological communities and distance in geographical...

Title: Dynamic Modeling of Incomplete Event History Data
Author: Heng, Fei
Date Created: 2019
Subjects--Topical: Statistics
Description: Event history analysis has important applications in many fields, such as medicine, engineering, econometrics, actuarial science, and social studies. We usually encounter missing data problems in the modeling of event history data. One typical pro...

Title: Evolution and dynamics of transcriptional regulation in bacteria
Author: Li, Shan
Date Created: 2013
Subjects--Topical: Computer science, Statistics, Bioinformatics
Description: Although transcription is one of the most important biological functions of cells, our understanding of its regulation is still limited. In this dissertation, we have studied the transcriptional regulation in prokaryotes in three aspects. First, w...

Title: FORECASTING TRAVEL TIME AND VARIATIONS IN TRAVEL TIME DUE TO VEHICLE ACCIDENTS IN SPATIO-TEMPORAL CONTEXT ALONG FREEWAY
Author: Reza, Rashid Mohammad
Date Created: 2015
Subjects--Topical: Civil engineering, Transportation, Statistics
Description: The growth in population, technological advancements, increase in average life expectancy, and newer and fuel-efficient vehicles has led to a meteoric rise in travel demand over the past few decades. However, the road network capacity has not incr...

Title: GENERALIZED QUASI-LIKELIHOOD RATIO TESTS FOR VARYING COEFFICIENT QUANTILE REGRESSION MODELS
Author: Wang, Yonggang
Date Created: 2013
Subjects--Topical: Statistics
Description: Quantile regression models which can track the relationship of predictive variables and the response variable in specific quantiles are especially useful in applications when extreme quantiles instead of the center of the distribution are interest...

Title: Generalized semiparametric varying-coefficient models for longitudinal data
Author: Qi, Li
Date Created: 2015
Subjects--Topical: Mathematics, Statistics, Biometry
Description: In this dissertation, we investigate the generalized semiparametric varying-coefficient models for longitudinal data that can flexibly model three types of covariate effects: time-constant effects, time-varying effects, and covariate-varying effec...

Title: Goodness-of-Fit Tests Under Permutations
Author: Chen, Chen
Date Created: 2019
Subjects--Topical: Statistics, Mathematics, Information science
Description: Several new goodness-of-fit tests are proposed on countable alphabets, where certain fundamental statistical concepts associated with random variables, such as cumulative distribution functions, characteristic functions and moments, may not exist....

Title: Greater Than the Sum of Its Parts: Isomorphism in Measures of Team Constructs
Author: Clayton, Elizabeth
Date Created: 2022
Subjects--Topical: Statistics, Organizational behavior
Description: Work teams are an ever-growing structure as organizations seek to become more agile and achieve better outcomes (Bersin, 2016; Deloitte, 2018). Therefore, organizational researchers seek to accurately recognize and understand various aspects of te...