Hydrogel Tracer Beads: The Development, Modification, and Testing of an Innovative Tracer for Better Understanding LNAPL Transport in Karst Aquifers

The goal of this specific research task is to develop proxy tracers that mimic contaminant movement to better understand and predict contaminant fate and transport in karst aquifers. Hydrogel tracer beads are transported as a separate phase than water and can used as a proxy tracer to mimic the transport of non-aqueous phase liquids (NAPL). They can be constructed with different densities, sizes & chemical attributes. This poster describes the creation and optimization of the beads and the field testing of buoyant beads, including sampling, tracer analysis, and quantitative analysis. The buoyant beads are transported ahead of the dissolved solutes, suggesting that light NAPL (LNAPL) transport in karst may occur faster than predicted from traditional tracing techniques. The hydrogel beads were successful in illustrating this enhanced transport.
Date: January 1, 2012
Creator: Amanda Laskoskie, Harry M. Edenborn, and Dorothy J. Vesper
System: The UNT Digital Library

2011 DOE Occupational Radiation Exposure Summary poster

This poster graphically presents data pertaining to occupational radiation exposure in terms of total effective dose (TED), primarily, but also collective dose and average measureable dose.
Date: December 12, 2012
Creator: Oak Ridge Associated Universities
System: The UNT Digital Library

Analysis of a US Department of Energy Emergent Technologies Cohort

As a major user of engineered nanoparticles, the U.S. Department of Energy (DOE) uses various methods to monitor the health of emergent technologies workers (ETW) who handle or could potentially be exposed to unbound engineered nanoparticles (UNP). Using data from DOE’s Illness and Injury Surveillance Program (IISP), Oak Ridge Associated Universities (ORAU) created a registry of ETWs. IISP currently tracks 125,000 workers at 14 DOE facilities. Workers in IISP, who were classified as ETWs, were placed in a separate database using Microsoft Access. Using SAS (Version 9.2; Cary, NC), the health status of this cohort was analyzed by a variety of different variables such as age, gender, occupation, years of employment, number of years classified as an ETW, and site.
Date: December 12, 2012
Creator: Strader, Cliff; Ellis, Elizabeth; Barrie, Martin D; Tankersley, William & Wallace, Phil
System: The UNT Digital Library

50 Years Later: Women, Work & the Work Ahead

Infographic commemorating the 50th anniversary of the American Women Report by outlining statistics and major events related to women's education and participation in the workforce from 1963 to 2012.
Date: 2012
Creator: United States. Women's Bureau.
System: The UNT Digital Library

Rapid Field Measurement of Dissolved Inorganic Carbon Based on CO{sub 2} Analysis

Dissolved inorganic carbon (DIC) is commonly measured in water and is an important parameter for understanding carbonate equilibrium, carbon cycling, and water-rock interaction. While accurate measurements can be made in the analytical laboratory, we have developed a rapid, portable technique that can be used to obtain accurate and precise data in the field as well.
Date: January 1, 2012
Creator: VESPER, DJ, Edenborn, Harry
System: The UNT Digital Library

U.S. Department of Energy Summary of 2012 Occupational Radiation Exposure

This poster provides graphic data for 2010-2012 of collective total effective dose (TED) by site, and graphical data for 2008-2012 of components of TED, average measurable TED, percentage of collective TED above dose, collective dose and average measurable dose (1974-2012), and numbers of individuals in the DOE workforce, total number of records of monitored individuals, and number of individuals with a measurable dose. Also, there is a table of the number of individuals receiving >2 rems administrative control level and >5 rems annual limit for 2008-2012.
Date: February 2, 2012
Creator: unknown
System: The UNT Digital Library