• On robust estimation of multiple change points in multivariate and matrix processes 

  Melnykov, Yana (University of Alabama Libraries, 2017)

  There are numerous areas of human activities where various processes are observed over time. If the conditions of the process change, it can be reflected through the shift in observed response values. The detection and ...
• A predictive model for highway accidents and two papers on clustering averaging 

  Wang, Ketong (University of Alabama Libraries, 2017)

  Predictive models and clustering algorithms are two of the most important statistical methodologies in solving quantitative problems. This dissertation document aims at proposing several innovative prediction and clustering ...
• Some contributions to univariate nonparametric tests and control charts 

  Zheng, Rong (University of Alabama Libraries, 2017)

  In general, statistical methods have two categories: parametric and nonparametric. Parametric analysis is usually made based on information regarding the probability distribution of the random variable. While, nonparametric ...
• Integrated supply chain models and analysis 

  Zhi, Jianing (University of Alabama Libraries, 2016)

  This dissertation reports on three integrated supply chain problems that incorporate several key components of modern supply chains, including location, transportation, inventory, and customer selection. The first part of ...
• The development of diagnostic tools for mixture modeling and model-based clustering 

  Zhu, Xuwen (University of Alabama Libraries, 2016)

  Cluster analysis performs unsupervised partition of heterogeneous data. It has applications in almost all fields of study. Model-based clustering is one of the most popular clustering methods these days due to its flexibility ...
• Online vehicle routing problems and analysis 

  Capar, Ibrahim (University of Alabama Libraries, 2016)

  Traditional optimization models, whether classified as deterministic or stochastic, require problem related parameters to be known with certainty or according to a probability distribution. However, in many real life ...
• Supply chain network design and analysis under disruptions 

  Firouz, Mohammad Firouz (University of Alabama Libraries, 2016)

  This dissertation focuses on two contributions in supply chain management when there is a risk of disruptions. The first contribution investigates the supply chain network design of a consumable product with risks imposed ...
• Reduced bias prediction regions and estimators of the original response when using data transformations 

  Walker, Michael (University of Alabama Libraries, 2015)

  Initially motivated by electron microscopy experiments, we develop an approximate prediction interval on the univariate response variable Y, where it is assumed that a normal-theory linear model is fit using a transformed ...
• Advances in mixture modeling and model based clustering 

  Michael, Semhar K. (University of Alabama Libraries, 2015)

  Cluster analysis is part of unsupervised learning that deals with finding groups of similar observations in heterogeneous data. There are several clustering approaches with the goal of minimizing the within cluster variance ...
• Location privacy exchange behavior: development and testing of two proposed models 

  Thompson, Samuel Charles (University of Alabama Libraries, 2013)

  Researchers studying the role of privacy perceptions in Location-Based Services (LBS) have primarily focused on information disclosure decisions at the individual transaction level, weighing the benefits of LBS against the ...
• On the detection and estimation of changes in a process mean based on kernel estimators 

  Mercado Velasco, Gary Ricardo (University of Alabama Libraries, 2012)

  Parametric control charts are very attractive and have been used in the industry for a very long time. However, in many applications the underlying process distribution is not known sufficiently to assume a specific ...
• Contributions to joint monitoring of location and scale parameters: some theory and applications 

  McCracken, Amanda Kaye (University of Alabama Libraries, 2012)

  Since their invention in the 1920s, control charts have been popular tools for use in monitoring processes in fields as varied as manufacturing and healthcare. Most of these charts are designed to monitor a single process ...
• A study of two special inventory management problems 

  Li, Linda (University of Alabama Libraries, 2016)

  In the dissertation, the author studies two special inventory problems via the technique of optimization. The first problem discusses inventory management in monopoly markets in which utilities are involved. To utility ...
• Value creation and capture in strategic management and it outsourcing theory: developing and validating a formal model 

  Tribble, Larry (University of Alabama Libraries, 2016)

  The question of the value contribution of Information Technology (IT) to the firm is a continuing concern in Management Information Systems (MIS) research. While firms make significant investments in IT resources and ...
• Advancing evidence-based practice in systems development: providing juried knowledge to software professionals 

  Hassler, Edgar E. (University of Alabama Libraries, 2014)

  The concept of utilizing information derived from carefully crafted scientific research to optimize the efficiency and/or effectiveness of a practice is by no means a new idea. For over two thousand years physicians, ...
• New models for homeland security and public safety 

  Fontem, Belleh (University of Alabama Libraries, 2014)

  The standard approach to mathematical optimization is to construct models which assume 1) perfect knowledge of the algebraic form of the optimizable function, and 2) that the problem parameters are not subject to external ...
• New models for operations planning under risk and uncertainty 

  Freeman, Nickolas Kirk (University of Alabama Libraries, 2014)

  The presence of uncertainty complicates planning decisions in all industries and sectors. In an operations context, failure to acknowledge and incorporate the unknowns in the decision-making process may lead to undesirable ...
• Three essays on improving ensemble models 

  Xu, Jie (University of Alabama Libraries, 2013)

  Ensemble models, such as bagging (Breiman, 1996), random forests (Breiman, 2001a), and boosting (Freund and Schapire, 1997), have better predictive accuracy than single classifiers. These ensembles typically consist of ...
• Coordination of pricing, sourcing and product design decisions in a supply chain 

  Liu, Bing (University of Alabama Libraries, 2013)

  Supply chain management is more than a movement advocated by a few pioneers today. It is a strategic as well as operational revolution for business operations. Better understanding of the underlying principles of supply ...
• Feature selection for evolutionary Commercial-Off-The-Shelf software: studies focusing on time-to-market, innovation and hedonic-utilitarian trade-offs 

  Kakar, Adarsh kumar Satindarlal (University of Alabama Libraries, 2013)

  Feature selection is one of the most important decisions made by product managers. This three article study investigates the concepts, tools and techniques for making trade-off decisions of introducing new features in ...

View more