Trait Contributions to Fish Community Assembly Emerge From Trophic Interactions in an Individual-Based Model

Community ecology seeks to understand and predict the characteristics of communities that can develop under different environmental conditions, but most theory has been built on analytical models that are limited in the diversity of species traits that can be considered simultaneously. We address that limitation with an individual-based model to simulate assembly of fish communities characterized by life history and trophic interactions with multiple physiological tradeoffs as constraints on species performance. Simulation experiments were carried out to evaluate the distribution of 6 life history and 4 feeding traits along gradients of resource productivity and prey accessibility. These experiments revealed that traits differ greatly in importance for species sorting along the gradients. Body growth rate emerged as a key factor distinguishing community types and defining patterns of community stability and coexistence, followed by egg size and maximum body size. Dominance by fast-growing, relatively large, and fecund species occurred more frequently in cases where functional responses were saturated (i.e. high productivity and/or prey accessibility). Such dominance was associated with large biomass fluctuations and priority effects, which prevented richness from increasing with productivity and may have limited selection on secondary traits, such as spawning strategies and relative size at maturation. Our results illustrate that the distribution of species traits and the consequences for community dynamics are intimately linked and strictly dependent on how the benefits and costs of these traits are balanced across different conditions.

An Indexing Structure and Application Model for Vehicles Moving on Road Networks

Moving objects database systems are the most challenging sub-category among Spatio-Temporal database systems. A database system that updates in real-time the location information of GPS-equipped moving vehicles has to meet even stricter requirements. Currently existing data storage models and indexing mechanisms work well only when the number of moving objects in the system is relatively small. This dissertation research aimed at the real-time tracking and history retrieval of massive numbers of vehicles moving on road networks. A total solution has been provided for the real-time update of the vehicles’ location and motion information, range queries on current and history data, and prediction of vehicles’ movement in the near future. To achieve these goals, a new approach called Segmented Time Associated to Partitioned Space (STAPS) was first proposed in this dissertation for building and manipulating the indexing structures for moving objects databases. Applying the STAPS approach, an indexing structure of associating a time interval tree to each road segment was developed for real-time database systems of vehicles moving on road networks. The indexing structure uses affordable storage to support real-time data updates and efficient query processing. The data update and query processing performance it provides is consistent without restrictions such as a time window or assuming linear moving trajectories. An application system design based on distributed system architecture with centralized organization was developed to maximally support the proposed data and indexing structures. The suggested system architecture is highly scalable and flexible. Finally, based on a real-world application model of vehicles moving in region-wide, main issues on the implementation of such a system were addressed.

An examination of Bernard Connor's The History of Poland (1698) and its depiction of the political, religious, and cultural history of the Polish-Lithuanian commonwealth

Connor was an Irish-born member of seventeenth-century English medical society who made an impact on medicine through his use of anatomy. This forward-thinking scientist also worked as a court physician for the Polish king John III Sobieski (1629- 1696) and published a history of that country. This thesis will examine Bernard Connor's 1698 publication The History of Poland to show that the Commonwealth was considered a vision of a progressive European parliamentary government that could serve as a model for a struggling English parliamentary government, thus supporting Larry Wolff and Maria Todorova's vision of the later eighteenth-century creation of the idea of a backward "eastern Europe."

Prisons, Profits, and Hard Labor: A Brief History of Convict Labor In Florida

The purpose of this research is to develop a broader understanding of the system in Florida. Specifically, I am looking at the privatization of convict labor programs by the Prison Rehabilitative Industries and Diversified Enterprises Corporation (PRIDE) in the 1980s and 1990s in state correctional institutions. This research will contribute to historiography of prisons in Florida in the context of the developing research about the Prison-Industrial Complex. Many scholars studying the Prison-Industrial Complex have drawn comparisons to today’s prison industries and the convict lease system of the late 19th and early 20th centuries, seeing the prison system go full circle drawing attention to the exploitative and institutionally racist nature of the modern prison system. This researched showed that the trend other scholars have studied also exist in Florida and Florida was actually a pioneer in the Prison-Industrial Complex. It was the first state to privatize its convict labor programs, becoming a model for other states. This research also shows that political and economic motivations were the primary forces governing prison policies, rather than education, rehabilitation, and safety. To complete this project, I analyzed articles from South Florida newspapers, such as the Sun-Sentinel and the Miami Herald, published during this period as well as literature published by the Department of Corrections. The United States has the highest rate of incarceration in the world and spends more money on prisons than education. Being such a large part of country, prisons warrant more critical study. This research will shed light on the nature of prisons, specifically here in Florida, in the hopes of seeking alternatives.

Prisons, Profits, and Hard Labor: A Brief History of Convict Labor In Florida

The purpose of this research is to develop a broader understanding of the system in Florida. Specifically, I am looking at the privatization of convict labor programs by the Prison Rehabilitative Industries and Diversified Enterprises Corporation (PRIDE) in the 1980s and 1990s in state correctional institutions. This research will contribute to historiography of prisons in Florida in the context of the developing research about the Prison-Industrial Complex. Many scholars studying the Prison-Industrial Complex have drawn comparisons to today’s prison industries and the convict lease system of the late 19th and early 20th centuries, seeing the prison system go full circle drawing attention to the exploitative and institutionally racist nature of the modern prison system. This researched showed that the trend other scholars have studied also exist in Florida and Florida was actually a pioneer in the Prison-Industrial Complex. It was the first state to privatize its convict labor programs, becoming a model for other states. This research also shows that political and economic motivations were the primary forces governing prison policies, rather than education, rehabilitation, and safety. To complete this project, I analyzed articles from South Florida newspapers, such as the Sun-Sentinel and the Miami Herald, published during this period as well as literature published by the Department of Corrections. The United States has the highest rate of incarceration in the world and spends more money on prisons than education. Being such a large part of country, prisons warrant more critical study. This research will shed light on the nature of prisons, specifically here in Florida, in the hopes of seeking alternatives.