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U.S. Mexico Migration

Description: This presentation is part of the faculty lecture series UNT Speaks Out on Unauthorized Immigration. This presentation discusses immigration, specifically between the United States and Mexico.
Date: April 13, 2011
Creator: Molina, David J.
Partner: UNT College of Arts and Sciences

The Cost of Homelessness in Dallas: An Economic and Fiscal Perspective

Description: This report, by the University of North Texas Center for Economic Development and Research, briefly describes the system of service delivery to homeless persons in Dallas and examines how other cities deal with their homeless populations, particularly those that have centralized service delivery. This report also documents the growing disparities in property values between the northern and southern sectors of the DCBD and calculates the potential tax revenues, jobs and income that could be generated by a revitalized southern sector.
Date: December 2000
Creator: Weinstein, Bernard L. & Clower, Terry L.
Partner: UNT Center for Economic Development and Research

The North American Breeding Bird Survey 1966-2011: Summary Analysis and Species Accounts

Description: Summary of 45-year program on bird population change and distribution, integrating habitat and migration status information, distribution maps depicting relative abundance, and current estimates and graphical illustrations of population change into accounts for 426 species of North American birds.
Date: December 2013
Creator: Sauer, John R.; Link, William A.; Fallon, Jane E.; Pardieck, Keith L. & Ziolkowski, David J., Jr.
Partner: UNT Libraries Government Documents Department

Cooperative Research to Study Dive Patterns of Sperm Whales in the Atlantic Ocean

Description: This report is based on the needs of the National Marine Fisheries Service and Minerals Management Service to gain data about the Sperm Whale population, comparing the population in the Gulf of Mexico to the Atlantic Ocean and Mediterranean Sea. Twelve whales were tagged and observed to gather various types of data about their population and environment.
Date: May 2007
Creator: Palka, Debra & Johnson, Mark
Partner: UNT Libraries Government Documents Department

Quantifying Access Disparities in Response Plans

Description: This article develops and explores data driven methods to quantify vulnerabilities in the context of response plans, addressing limitations on the availability, granularity, and currency of data to identify vulnerable populations.
Date: January 15, 2016
Creator: Indrakanti, Saratchandra; Mikler, Armin R.; O'Neil II, Martin & Tiwari, Chetan
Partner: UNT College of Engineering

Illustrating the future prediction of performance based on computer code, physical experiments, and critical performance parameter samples

Description: In this paper, we present a generic example to illustrate various points about making future predictions of population performance using a biased performance computer code, physical performance data, and critical performance parameter data sampled from the population at various times. We show how the actual performance data help to correct the biased computer code and the impact of uncertainty especially when the prediction is made far from where the available data are taken. We also demonstrate how a Bayesian approach allows both inferences about the unknown parameters and predictions to be made in a consistent framework.
Date: January 1, 2009
Creator: Hamada, Michael S & Higdon, David M
Partner: UNT Libraries Government Documents Department

Revisiting the age of enlightenment from a collective decision making systems perspective

Description: The ideals of the eighteenth century's Age of Enlightenment are the foundation of modern democracies. The era was characterized by thinkers who promoted progressive social reforms that opposed the long-established aristocracies and monarchies of the time. Prominent examples of such reforms include the establishment of inalienable human rights, self-governing republics, and market capitalism. Twenty-first century democratic nations can benefit from revisiting the systems developed during the Enlightenment and reframing them within the techno-social context of the Information Age. This article explores the application of social algorithms that make use of Thomas Paine's (English: 1737--1809) representatives, Adam Smith's (Scottish: 1723--1790) self-interested actors, and Marquis de Condorcet's (French: 1743--1794) optimal decision making groups. It is posited that technology-enabled social algorithms can better realize the ideals articulated during the Enlightenment.
Date: January 1, 2009
Creator: Rodriguez, Marko A & Watkins, Jennifer H
Partner: UNT Libraries Government Documents Department

Segmentation of Three Dimensional Cell Culture Models from aSingle Focal Plane

Description: Three dimensional cell culture models offer new opportunities for development of computational techniques for segmentation and localization. These assays have a unique signature of a clump of cells that correspond to a functioning colony. Often the nuclear compartment is labeled and then imaged with fluorescent microscopy to provide context for protein localization. These colonies are first delineated from background using the level set method. Within each colony, nuclear regions are then bounded by their center of mass through radial voting, and a local neighborhood for each nucleus is established through Voronoi tessellation. Finally, the level set method is applied again within each Voronoi region to delineate the nuclear compartment. The paper concludes with the application of the proposed method to a dataset of experimental data demonstrating a stable solution when iterative radial voting and level set methods are used synergistically.
Date: November 1, 2006
Creator: Chang, Hang & Parvin, Bahram
Partner: UNT Libraries Government Documents Department

The Population Dynamics and Trophic Relationships of Seven Species of Fish in a Small Southwestern Pond, with Special Attention Toward Young-of-the-Year Fish

Description: Production rates of seven species of fish, along with food-web interactions, were determined for one year in a pond. Production of fish in the pond amounted to 208.9 q/m2/yr. Over 95% of the production occurred in the summer, with Y of Y fish contributing 83.8%. There were two food-web interactions observed in Y of Y fishes: crappie vs. bass and bullhead vs. sunfish. When Y of Y fish shifted to benthic diets in the spring, the small biomass of benthos available could not sustain the larger biomass of fish. Competition for the available food resulted in decreased production rates for the fish community.
Date: August 1975
Creator: Jones, Fredrick V.
Partner: UNT Libraries

Systematic Effects in Type-1a Supernovae Surveys from Host Galaxy Spectra

Description: The physical relation between the properties of Type Ia supernovae and their host galaxies is investigated. Such supernovae are used to constrain the properties of dark energy, making it crucial to understand their physical properties and to check for systematic effects relating to the stellar populations of the progenitor stars from which these supernovae arose. This grant found strong evidence for two distinct populations of supernovae, and correlations between the progenitor stellar populations and the nature of the supernova light curves.
Date: August 23, 2013
Creator: Strauss, Michael A.
Partner: UNT Libraries Government Documents Department

Looking for Darwin's footprints in the microbial world

Description: As we observe the 200th anniversary of Charles Darwin's birthday, microbiologists interested in the application of Darwin's ideas to the microscopic world have a lot to celebrate: an emerging picture of the (mostly microbial) Tree of Life at ever-increasing resolution, an understanding of horizontal gene transfer as a driving force in the evolution of microbes, and thousands of complete genome sequences to help formulate and refine our theories. At the same time, quantitative models of the microevolutionary processes shaping microbial populations remain just out of reach, a point that is perhaps most dramatically illustrated by the lack of consensus on how (or even whether) to define bacterial species. We summarize progress and prospects in bacterial population genetics, with an emphasis on detecting the footprint of positive Darwinian selection in microbial genomes.
Date: March 30, 2009
Creator: Shapiro, B. Jesse; David, Lawrence A.; Friedman, Jonathan & Alm, Eric J.
Partner: UNT Libraries Government Documents Department

Population Viability Analysis of Riverine Fishes

Description: Many utilities face conflkts between two goals: cost-efficient hydropower generation and protecting riverine fishes. Research to develop ecological simulation tools that can evaluate alternative mitigation strategies in terms of their benefits to fish populations is vital to informed decision-making. In this paper, we describe our approach to population viability analysis of riverine fishes in general and Snake River white sturgeon in particular. We are finding that the individual-based modeling approach used in previous in-stream flow applications is well suited to addressing questions about the viability of species of concern for several reasons. Chief among these are: (1) the abiIity to represent the effects of individual variation in life history characteristics on predicted population viabili~, (2) the flexibili~ needed to quanti~ the ecological benefits of alternative flow management options by representing spatial and temporal variation in flow and temperaturty and (3) the flexibility needed to quantifi the ecological benefits of non-flow related manipulations (i.e., passage, screening and hatchery supplementation).
Date: April 12, 1999
Creator: Bates, P.; Chandler, J.; Jager, H.I.; Lepla, K. & Van Winkle, W.
Partner: UNT Libraries Government Documents Department