First Time Principal Investigators

  • William Alexander, Chemistry

  • Dorian Burnette, Earth Sciences
    Name of Project: "Collaborative Research: Cool and Warm Season Moisture Reconstruction and Modeling over North America"

    Sponsor: NSF Paleoclimate Program, Paleo Perspectives on Climate Change

    Time Frame: 1 September 2013-31 August 2016 (3 Years)

    Collaborators: David Stahle (University of Arkansas), Edward Cook (Lamont-Doherty Earth Observatory of Columbia University), and Benjamin Cook (NASA Goddard Institute for Space Studies)

    Summary of Research:

    This collaborative research uses hundreds of new and existing tree-ring chronologies to reconstruct both cool and warm season moisture levels across much of tropical, subtropical, and temperate North America. The seasonal reconstructions will be developed on a 0.5° grid for every year during two fixed time periods: AD 1500-present and AD 1000-present. The new reconstructions will be used with climate model simulations to test hypotheses concerning the ocean-atmospheric forcing of cool and warm season climate over North America, the climate dynamics responsible for decadal droughts and wet periods in each season, and the influence of anthropogenic trace gas and land surface changes on seasonal droughts and wet periods. The reconstructions and climate simulations will also be used to identify ancient analogues for the extreme decadal droughts and wet periods witnessed during the modern era. The new reconstructions will have major interdisciplinary applications by providing an objective exactly dated framework for evaluating the impacts of seasonal climate extremes on social and ecological change during the prehistoric, colonial, and modern eras.

    We have successfully reconstructed the Palmer Drought Severity Index (PDSI) for June-August (JJA) over much of subtropical North America including the entire Republic of Mexico. This Mexican Drought Atlas is based on 251 tree-ring chronologies, including 82 from Mexico and another 169 from the southern U.S. and western Guatemala. A presentation on this new drought atlas was given at the American Geophysical Union fall meeting in December 2014, and two manuscripts are in preparation, including an invited paper to Quaternary Science Reviews. We have also been developing a suite of web-based tools that will allow researchers worldwide to create maps of single year or multiyear drought and wet periods (e.g., see composite map of the 16th Century Megadrought), perform correlation and congruence analyses, and extract time series and drought area indices for locations of interest to them. These tools have been developed to work with the existing North American Drought Atlas and Monsoon Asia Drought Atlas as well as the forthcoming North American Seasonal Drought Atlas, which will be computed later this fall. The websites are being beta tested at this time, and will be made publically available in 2016.

  • Eunseo Choi, CERI
    • Name of Project: EarthCube Building Blocks: Earth System Bridge: Spanning Scientific Communities with Interoperable Modeling Frameworks
    • Sponsoring Agencies: NSF-EarthCube
    • Time Frame of Projects: 09/17/2013 – 09/16/2016
    • Collaborators:
    Scott Peckham (U. Colorado, Boulder)
    Cecilia Deluca (U. Colorado, Boulder/NOAA)
    David Gochis (UCAR)
    Anna Kelbert (USGS)
    Rocky Dunlap (U. Colorado, Boulder/NOAA)
    Rick Hoooper (CUAHSI)

    • Summary of Research Efforts:
    This project is developing a theoretical basis and practical approach to cross-domain framework interoperability, and using this strategy to demonstrate how community frameworks used in Earth sciences can be connected to solve societally relevant interdisciplinary scientific problems. The intellectual merit of the project is a rigorous and objective analysis on the framework features, which has been rare although modeling frameworks and coupling technologies have emerged over the last decade as a critical element of cyberinfrastructure for multi-component applications. This work will also extend the findings of an international forum for Earth science framework developers co-organized by co-investigator AB Dunlap (NOAA, Boulder, CO). The broader impacts of this project include the wide applicability of the approach developed. Both the theoretical basis of our work and the specific inter-framework bridges will function as building blocks that will lead to a more interconnected and capable modeling community.

  • Cary Holladay, English
    The River City Writers Series, under my direction, received a Literary Touring Grant from SouthArts in the amount of $595 to support a visit from author Pam Durban in Fall 2013. The funding originated with the NEA. Collaborators included Matt Krajniak, graduate assistant; Prof. Courtney Santo; and the Office of Research Support.

    Here is a photo for the PI website. It is a couple of years old, and most of the students have graduated. I hope it will still be useful. It pertains to the Literary Touring grant ($595) that we received from SouthArts to support a visit by writer Pam Durban.

    It shows ENGL 7485 / 8485 Literary Programming students showing a promotional event they did for Prof. Pam Durban's visit (Oct 16-17, 2013) in the River City Writers Series. Durban's novel, The Tree of Forgetfulness, is based on the true story of a lynching in Aiken, SC, in 1926, in which three people were murdered.
    Students tied yellow ribbons on a tree in remembrance of all those who have died in civil rights violence.
    From left to right, the students in the picture are: Michael Vine, Amanda Muir, Jonathan Vowell, Sarah Slack, Jeremy Scherer, and Danian Jerry.

  • Jennifer Mandel, Biological Sciences
    · Name of Project Assessing the risk of transgene escape via pollen flow in carrot
    · Sponsoring Agencies —USDA-NIFA
    · Time Frame of Projects 2014-2016
    · Collaborators Dr. David McCauley, Vanderbilt University
    · Summary of Research Efforts Gene flow between genetically modified (GM) crops and their wild relatives has the potential to enhance weediness and/or invasiveness of wild species. In the United States, invasive species have major negative impacts on natural ecosystems, leading to billions of dollars per year in economic and environmental damages, and invasive species are often responsible for the displacement and/or extirpation of native species. We study the potential for gene flow between cultivated carrot and its wild, weedy (admittedly pretty) progenitor, Queen Anne's Lace using a variety of genetic, genomics, and greenhouse studies.

  • Ben McCarty, Mathematical Sciences
    • Name of Project
    Shelby County Schools Math Science Partnership
    • Sponsoring Agencies
    Tennessee Department of Education
    • Time Frame of Projects
    Spring 2014 – Spring 2015

    • Collaborators
    Alistair Windsor & Ceila Anderson

    • Summary of Research Efforts
    We provided professional development and training to SCS teachers and coaches in preparation for the implementation of the new Tennessee Academic Standards for Mathematics.


  • Duane McKenna, Biological Sciences
    Name of Project: Phylogeny and diversification in the uniquely diverse beetle family Curculionidae (true weevils) [aka: The 1K Weevils Project]
    Sponsoring Agencies: United States National Science Foundation
    Time Frame of Project: May 2014-May 2017
    Collaborators: Brian Farrell (Harvard University), Adriana Marvaldi (National University of La Plata, Argentina), Rolf Oberprieler (CSIRO, Australia), and a team of 15 specialist-collaborators from North and South America, Europe, Australia, and Africa.
    Summary of Research Efforts: The weevil family Curculionidae contains >51,000 named species and is one of the largest families of animals on Earth. Because of their intimate and often highly specialized interactions with plants and fungi, Curculionidae are among the most significant pests of agriculture and forestry worldwide, and some of the most abundant insects on Earth. This project will clarify the interrelationships of all major groups of weevils for the first time using phylogenomic data. The genomic data gathered will consist of DNA sequences from 1,000 species representing all major groups of weevils, obtained via an approach called anchored phylogenomics. This will be one of the first applications of this new method for gathering phylogenomic data in insects. The resulting family trees will be used to test long-standing hypotheses about weevil relationships and evolution, and will contribute to resolving the taxonomic problems that both pervade the internal higher classification of weevils and impede research on economically- and ecologically-important weevil species.
    Photo: Please use the one here: https://www.memphis.edu/biology/people/faculty/duane-mckenna.php

  • Ryan Parish, Earth Sciences
    • "Visualization of chert artifacts using Reflectance Spectroscopy as a preservation provenance technology"
    • National Park Service
    • 1 year
    • Dr. David Dye and Dr. Ying Sing Li
    • We are developing a non-destructive technique to analyze stone artifacts that allows archaeologists to identify where on the landscape the stone was obtained prehistorically. The project created the largest database of flint samples in the Southeastern United States which acts as a library in which unknown artifacts made out of chert (flint) can potentially be identified within and thereby 'sourced' back to the deposit of origin. The technique utilized in the study is reflectance spectroscopy which analyzes the atomic and molecular configuration of the chert. An understanding of prehistoric sources allows us to visualize migrations and trade along with a number of other prehistoric behaviors.
    • See attached photo


    Ryan M. Parish, PhD
    Assistant Professor of Archaeology
    Department of Earth Sciences
    University of Memphis
    (901) 678-2606


  • Vinhthuy Phan, Computer Science
    - Analysis of Gene Expressions Using Transitive Directed Graphs
    - NSF
    - 7/15/2013 - 6/30/2016
    - None
    - Recent advances in biotechnology have facilitated the simultaneous measurement of response of thousands of genes, and in effect enabled comparative studies that can identify which drugs are most effective and have fewest side effects at the genetic level. To obtain true response patterns of genes from these studies, researchers have often utilized a conservatively large number of samples for each treatment, increasing the cost significantly for studies with many drugs. This project will develop new methods that elucidate the relationships between true patterns of gene response to treatments and sample size. The use of directed graphs to represent gene response patterns make it easier for researchers to distinguish and visualize subtle gene-expression differences resulting from similar drugs. Additional properties of these graphs are exploited to isolate false patterns from true ones, enabling accurate predictions of true patterns of gene response even in cases where there are few samples. Accurate prediction of true response patterns of genes further leads to accurate prediction of gene function.

  • Prabhakar Pradhan, Physics

  • Idia Thurston, Psychology