Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing a comparative research study of children and their attitudes towards violence.

Poster presentation for the 2012 University Scholars Day at the University of North Texas. This poster discusses a research study that analyzes the way that families cope with the situation when their children come out of the closet as gay, lesbian, or bisexual.

Poster presentation for the 2012 University Scholars Day at the University of North Texas. This poster discusses research on the biocompatible graphene-based growth of cancer cells. Graphene is made of a single layer of carbon atoms. Recently is has been used to successfully differentiate stem cells in neural cells.

Poster for the 2012 University Scholars Day at the University of North Texas discussing research on the narration of a narrative.

Poster for the 2012 University Scholars Day at the University of North Texas discussing research on the lives and policies of John Adams and Thomas Jefferson and their views on Machiavelli.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on what is in our drinking water.

Poster for the 2012 University Scholars Day at the University of North Texas. This poster discusses research on how non-native, western speakers acquire languages involving Sino/Japanese characters. Specifically, it addresses how elements from instruction in the native language and culture may be modified to enhance mastery of the given language with regard to character use and literacy.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on epilepsy.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on collectivist cultures and individualistic cultures.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the history of gay, lesbian, bisexual, and transgender community at the University of North Texas (UNT).

This poster includes best practices for using genre headings to enhance discovery of tabletop games.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing a scientific game to discover new mapping algorithms for domain-specific architectures named, "Untangled."

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing the relative influences of personal psychological factors on conversational interpretation and behavior.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on foster care parents and their views of the foster system.

Effective environmental management of DOE sites requires reliable prediction of reactive transport phenomena. A central issue in prediction of subsurface reactive transport is the impact of multiscale physical, chemical, and biological heterogeneity. Heterogeneity manifests itself through incomplete mixing of reactants at scales below those at which concentrations are explicitly defined (i.e., the numerical grid scale). This results in a mismatch between simulated reaction processes (formulated in terms of average concentrations) and actual processes (controlled by local concentrations). At the field scale, this results in apparent scale-dependence of model parameters and inability to utilize laboratory parameters in field models. Accordingly, most field modeling efforts are restricted to empirical estimation of model parameters by fitting to field observations, which renders extrapolation of model predictions beyond fitted conditions unreliable. The objective of this project is to develop a theoretical and computational framework for (1) connecting models of coupled reactive transport from pore-scale processes to field-scale bioremediation through a hierarchy of models that maintain crucial information from the smaller scales at the larger scales; and (2) quantifying the uncertainty that is introduced by both the upscaling process and uncertainty in physical parameters. One of the challenges of addressing scale-dependent effects of coupled processes in …

Poster presentation for the 2009 University Scholars Day at the University of North Texas discussing research how relative age effect contributes to becoming an honors student.

Poster for the 2012 University Scholars Day at the University of North Texas discussing the socioeconomic and cultural impact of the homeless on the Denton, Texas community.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on film and finances.

Poster for the 2012 University Scholars Day at the University of North Texas discussing science, technology, engineering, and mathematics (STEM) education and America's future.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing the most important factors for maximizing fan attendance at sporting events.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the prevalence of heart disease in African-American men and the influence of cultural factors.

Poster presentation for the 2012 University Scholars Day at the University of North Texas discussing research on the effect of modern medical technology on the cost of health insurance coverage.

Poster presentation for the 2012 University Scholar Day at the University of North Texas discussing research on the impact of globalization on Chile.

Remediation and long-term stewardship of uranium-contaminated sediments and groundwaters are critical problems at a number of DOE facilities and mining sites. Some remediation strategies based on in-situ bioreduction of U are potentially effective in significantly decreasing U concentrations in groundwaters. However, a number of basic processes require understanding in order to identify conditions more conducive to success of reduction-based U stabilization. Our current research targets several of these issues including: (1) effects of organic carbon (OC) forms and supply rates on stability of bioreduced U, (2) the roles of Fe(III)- and Mn(III,IV)-oxides as potential U oxidants in sediments, and (3) microbial community changes in relation to U redox changes. These issues were identified in our previous study on U bioreduction and reoxidation (Wan et al., 2005). Most of our studies are being conducted on historically U-contaminated sediments from Area 2 of the Field Research Center, Oak Ridge National Laboratory, in flow-through columns simulating in-situ field remediation.