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Articles 145261 - 145290 of 302471

Full-Text Articles in Physical Sciences and Mathematics

Properties Of Cu(In,Ga,Al)Se² Thin Films Fabricated By Magnetron Sputtering, Talaat A. Hameed, Wei Cao, Bahiga A. Mansour, Inas K. Elzawaway, El-Metwally M. Abdelrazek, Hani E. Elsayed-Ali Jan 2015

Properties Of Cu(In,Ga,Al)Se² Thin Films Fabricated By Magnetron Sputtering, Talaat A. Hameed, Wei Cao, Bahiga A. Mansour, Inas K. Elzawaway, El-Metwally M. Abdelrazek, Hani E. Elsayed-Ali

Applied Research Center Publications

Cu (In,Ga,Al)Se2 (CIGAS) thin films were studied as an alternative absorber layer material to Cu(InxGa1-x)Se2. CIGAS thin films with varying Al content were prepared by magnetron sputtering on Si(100) and soda-lime glass substrates at 350 °C, followed by postdeposition annealing at 520 °C for 5 h in vacuum. The film composition was measured by an electron probe microanalyzer while the elemental depth profiles were determined by secondary ion mass spectrometry. X-ray diffraction studies indicated that CIGAS films are single phase with chalcopyrite structure and that the (112) peak clearly shifts to higher 2θ …

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Changes To Climate Central’S Risk Finder Tool: A Usability Report, Justin Sikes Jan 2015

Changes To Climate Central’S Risk Finder Tool: A Usability Report, Justin Sikes

OUR Journal: ODU Undergraduate Research Journal

Students in the Fall English 231C Honors Climate Change and Crisis Communication course worked with instructor Megan McKittrick and Dr. Richards to conduct a usability test of Climate Central’s Risk Finder tool. Using the qualitative data, general trends that indicate potential areas of improvement for the website were identified. Students’ tasks were to find volunteers for the usability test through systematic sampling, conduct the test and analyze the audio recordings, and finally to code the data for themes to see if any trends became apparent. Several things became noticeable after looking at the responses of the four research participants, particularly …

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Cures Garden Program - Martha Baldwin, Center For Urban Resilience Jan 2015

Cures Garden Program - Martha Baldwin, Center For Urban Resilience

Module 10: Garden Ecology

No abstract provided.

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A Generalized Service Replication Process In Distributed Environments, Hany F. Elyamany, Marwa F. Mohamed, Katarina Grolinger, Miriam Am Capretz Jan 2015

A Generalized Service Replication Process In Distributed Environments, Hany F. Elyamany, Marwa F. Mohamed, Katarina Grolinger, Miriam Am Capretz

Electrical and Computer Engineering Publications

Replication is one of the main techniques aiming to improve Web services’ (WS) quality of service (QoS) in distributed environments, including clouds and mobile devices. Service replication is a way of improving WS performance and availability by creating several copies or replicas of Web services which work in parallel or sequentially under defined circumstances. In this paper, a generalized replication process for distributed environments is discussed based on established replication studies. The generalized replication process consists of three main steps: sensing the environment characteristics, determining the replication strategy, and implementing the selected replication strategy. To demonstrate application of the generalized …

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Perspectivas Culturais Na Comunicação Climática (Cultural Perspectives On Climate Communication), Karen E. Pennesi Jan 2015

Perspectivas Culturais Na Comunicação Climática (Cultural Perspectives On Climate Communication), Karen E. Pennesi

Anthropology Publications

Este artigo considera que a previsão climática deve ser interpretada dentro de contextos sociais, culturais e linguísticos. Dentro de uma perspectiva antropológica baseada em entrevistas, observações e um questionário, será investigado como mudanças no meio-ambiente são entendidas por diferentes indivíduos, e transformadas em previsões que são comunicadas a diversos públicos. A linguagem utilizada e a maneira como a previsão é comunicada depende da experiência e dos objetivos do previsor, enquanto que a interpretação e a avaliação da previsão por outros são influenciadas por seus diferentes objetivos, atitudes, conhecimento e práticas. Esta etnografia da comunicação enfatiza o processo da comunicação das …

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What The Integral Does: Physics Students' Efforts At Making Sense Of Integration, Fr. Joseph Wagner S.J. Jan 2015

What The Integral Does: Physics Students' Efforts At Making Sense Of Integration, Fr. Joseph Wagner S.J.

Faculty Scholarship

Students use a variety of resources to make sense of integration, and interpreting the definite integral as a sum of infinitesimal products (rooted in the concept of a Riemann sum) is particularly useful in many physical contexts. This study of beginning and upper-level undergraduate physics students examines some obstacles students encounter when trying to make sense of integration, as well as some discomforts and skepticism some students maintain even after constructing useful conceptions of the integral. In particular, many students attempt to explain what integration does by trying to interpret the algebraic manipulations and computations involved in finding antiderivatives. This …

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An Extended Theoretical Framework For The Concept Of The Derivative, Joseph F. Wagner, David Roundy, Tevian Dray, Corinne Monogue, Eric Weber Jan 2015

An Extended Theoretical Framework For The Concept Of The Derivative, Joseph F. Wagner, David Roundy, Tevian Dray, Corinne Monogue, Eric Weber

Faculty Scholarship

No abstract provided.

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Dye Distance Mapping Using Waveguide Evanescent Field Fluorescence Microscopy And Its Application To Cell Biology, Frederik Fleissner, Michael Morawitz, S. Jeffrey Dixon, Uwe Langbein, Silvia Mittler Jan 2015

Dye Distance Mapping Using Waveguide Evanescent Field Fluorescence Microscopy And Its Application To Cell Biology, Frederik Fleissner, Michael Morawitz, S. Jeffrey Dixon, Uwe Langbein, Silvia Mittler

Physics and Astronomy Publications

Previous studies have measured the distance between cells and the substratum at sites of adhesion via the emission of a fluorescent dye and waveguide methods. Here, we demonstrate a novel approach to measure the position of fluorescent dyes above a waveguide surface in the 10-200 nm distance range throughout an entire area, yielding a 2D dye distance map or a 3D contour plot. The dye is located in a multilayered Langmuir Blodgett (LB) film or in the plasma membrane of a cell. Waveguide evanescent field fluorescence (WEFF) images obtained using two different waveguide modes are employed allowing, with a simple …

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Charged Particle Dynamics In The Magnetic Field Of A Long Straight Current-Carrying Wire, M. Fatuzzo, A. Prentice, T. Toepker Jan 2015

Charged Particle Dynamics In The Magnetic Field Of A Long Straight Current-Carrying Wire, M. Fatuzzo, A. Prentice, T. Toepker

Faculty Scholarship

The article discusses the concept behind motion of a charged particle in a non-uniform filed of a wire carrying current. Topics discussed include possible types of motion in a current carrying field, vector analysis of velocity and magnetic field of the particle and Coupled differential equations.

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A Management Framework For Municipal Solid Waste Systems And Its Application To Food Waste Prevention, Krista L. Thyberg, David J. Tonjes Jan 2015

A Management Framework For Municipal Solid Waste Systems And Its Application To Food Waste Prevention, Krista L. Thyberg, David J. Tonjes

Technology & Society Faculty Publications

Waste management is a complex task involving numerous waste fractions, a range of technological treatment options, and many outputs that are circulated back to society. A systematic, interdisciplinary systems management framework was developed to facilitate the planning, implementation, and maintenance of sustainable waste systems. It aims not to replace existing decision-making approaches, but rather to enable their integration to allow for inclusion of overall sustainability concerns and address the complexity of solid waste management. The framework defines key considerations for system design, steps for performance monitoring, and approaches for facilitating continual system improvements. It was developed by critically examining the …

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Differences In Waste Generation, Waste Composition, And Source Separation Across Three Waste Districts In A New York Suburb, Omkar Aphale, Krista L. Thyberg, David J. Tonjes Jan 2015

Differences In Waste Generation, Waste Composition, And Source Separation Across Three Waste Districts In A New York Suburb, Omkar Aphale, Krista L. Thyberg, David J. Tonjes

Technology & Society Faculty Publications

Six tonnes of discards and recyclables from three waste districts in a New York suburb were sorted in 2012. The districts were chosen because one had a higher recycling percentage, one had median performance, and one was a low performing district. ASTM standards were followed for the waste composition sorting. The results showed, as expected, that the waste district with the highest recycling rate appeared to have the highest separation efficiencies, leading to greater amounts of recyclable materials being source separated. The waste districts also had different overall waste generation, both in terms of the amounts of wastes generated, and …

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Quantification Of Food Waste Disposal In The United States: A Meta-Analysis, Krista L. Thyberg, David J. Tonjes, Jessica Gurevitch Jan 2015

Quantification Of Food Waste Disposal In The United States: A Meta-Analysis, Krista L. Thyberg, David J. Tonjes, Jessica Gurevitch

Technology & Society Faculty Publications

Food waste has major consequences for social, nutritional, economic, and environmental issues, and yet the amount of food waste disposed in the U.S. has not been accurately quantified. We introduce the transparent and repeatable methods of meta-analysis and systematic reviewing to determine how much food is discarded in the U.S., and to determine if specific factors drive increased disposal. The aggregate proportion of food waste in U.S. municipal solid waste from 1995 to 2013 was found to be 0.147 (95% CI 0.137-0.157) of total waste, which is lower than that estimated by USEPA for the same period (0.176). The proportion …

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Morphological, Structural, And Spectral Characteristics Of Amorphous Iron Sulfates, Elizabeth Sklute, Heidi Jensen, Deanne Rogers, Richard Reeder Jan 2015

Morphological, Structural, And Spectral Characteristics Of Amorphous Iron Sulfates, Elizabeth Sklute, Heidi Jensen, Deanne Rogers, Richard Reeder

Department of Geosciences Faculty Publications

Current or past brine hydrologic activity on Mars may provide suitable conditions for the formation of amorphous ferric sulfates. Once formed, these phases would likely be stable under current Martian conditions, particularly at low- to mid-latitudes. Therefore, we consider amorphous iron sulfates (AIS) as possible components of Martian surface materials. Laboratory AIS were created through multiple synthesis routes and characterized with total X-ray scattering, thermogravimetric analysis, scanning electron microscopy, visible/near-infrared (VNIR), thermal infrared (TIR), and Mössbauer techniques. We synthesized amorphous ferric sulfates (Fe(III)2(SO4)3 · ~ 6–8H2O) from sulfate-saturated fluids via vacuum dehydration or exposure to low relative humidity (

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Integrating Naturalized Areas Onto The University At Albany Campus, Cassidy Drasser, Bryan King, Aidan Mcgovern, Ahren Von Schnell Jan 2015

Integrating Naturalized Areas Onto The University At Albany Campus, Cassidy Drasser, Bryan King, Aidan Mcgovern, Ahren Von Schnell

Publications

The purpose of this management plan is to provide recommendations to create naturalized areas and increase biodiversity on the University at Albany campus. The University currently follows a number of environmental policies in an effort to promote uniformity. There are many benefits to increasing biodiversity on campus such as providing ecosystem services, increasing education and awareness, aiding in stormwater management, and support institutional advancement. There are already several areas on the campus that would serve as prime locations for projects of this nature including the front lawn and the Dutch and State parking lots. Future directions that the campus can …

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Collective Impact: Results From A Multi-Campus Farm To College Pilot Program, Mary Ellen Mallia, Jamie Adams, Hannah Morgan, Lisa Mitten, Deborah Howard Jan 2015

Collective Impact: Results From A Multi-Campus Farm To College Pilot Program, Mary Ellen Mallia, Jamie Adams, Hannah Morgan, Lisa Mitten, Deborah Howard

Presentations

Presented at Association for the Advancement of Sustainability in Higher Education (AASHE) Conference and State of NY Sustainability Conference.

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Scaling Up Local Food Sourcing: A Multi-Campus Farm To College Pilot (2015), Mary Ellen Mallia, Lisa Mitten, Hannah Morgan, Jamie Adams, Deborah Howard Jan 2015

Scaling Up Local Food Sourcing: A Multi-Campus Farm To College Pilot (2015), Mary Ellen Mallia, Lisa Mitten, Hannah Morgan, Jamie Adams, Deborah Howard

Presentations

Presented at the Northeast Campus Sustainability Consortium Conference.

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Scaling Up Local Food Purchases, Mary Ellen Mallia, Lisa Mitten, Hannah Morgan, Jamie Adams, Deborah Howard Jan 2015

Scaling Up Local Food Purchases, Mary Ellen Mallia, Lisa Mitten, Hannah Morgan, Jamie Adams, Deborah Howard

Presentations

Presented at the State of NY Sustainability Conference.

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Multiple-Choice Testing Using Immediate Feedback-Assessment Technique (If At®) Forms: Second-Chance Guessing Vs. Second-Chance Learning?, Jeremy D. Merrel, Pier F. Cirillo, Pauline M. Schwartz, Jeffrey Webb Jan 2015

Multiple-Choice Testing Using Immediate Feedback-Assessment Technique (If At®) Forms: Second-Chance Guessing Vs. Second-Chance Learning?, Jeremy D. Merrel, Pier F. Cirillo, Pauline M. Schwartz, Jeffrey Webb

Chemistry and Chemical Engineering Faculty Publications

Multiple choice testing is a common but often ineffective method for evaluating learning. A newer approach, however, using Immediate Feedback Assessment Technique (IF AT®, Epstein Educational Enterprise, Inc.) forms, offers several advantages. In particular, a student learns immediately if his or her answer is correct and, in the case of an incorrect answer, has an opportunity to provide a second response and receive partial credit for a correct second attempt. For a multiple choice question with five possible answers, the IF AT® form covers spaces labeled A through E with a thin opaque film; when the film is scratched away, …

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Observations Of Carbon Export By Small Sinking Particles In The Upper Mesopelagic, Colleen A. Durkin, Meg Estapa, Ken O. Buesseler Jan 2015

Observations Of Carbon Export By Small Sinking Particles In The Upper Mesopelagic, Colleen A. Durkin, Meg Estapa, Ken O. Buesseler

Geosciences

Carbon and nutrients are transported out of the surface ocean and sequestered at depth by sinking particles. Sinking particle sizes span many orders of magnitude and the relative influence of small particles on carbon export compared to large particles has not been resolved. To determine the influence of particle size on carbon export, the flux of both small (11–64 μm) and large (> 64 μm) particles in the upper mesopelagic was examined during 5 cruises of the Bermuda Atlantic Time Series (BATS) in the Sargasso Sea using neutrally buoyant sediment traps mounted with tubes containing polyacrylamide gel layers and tubes …

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Particle Dynamics In The Rising Plume At Piccard Hydrothermal Field, Mid-Cayman Rise, Meg Estapa, J. A. Breier, C R. German Jan 2015

Particle Dynamics In The Rising Plume At Piccard Hydrothermal Field, Mid-Cayman Rise, Meg Estapa, J. A. Breier, C R. German

Geosciences

Processes active in rising hydrothermal plumes, such as precipitation, particle aggregation, and biological growth, affect particle size distributions and can exert important influences on the biogeochemical impact of submarine venting of iron to the oceans and their sediments. However, observations to date of particle size distribution within these systems are both limited and conflicting. In a novel buoyant hydrothermal plume study at the recently discovered high-temperature (398°C) Piccard Hydrothermal Field, Mid-Cayman Rise, we report optical measurements of particle size distributions (PSDs). We describe the plume PSD in terms of a simple, power-law model commonly used in studies of upper and …

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Decoupling Of Net Community Production And Export Production At Submesoscale Fronts In The Sargasso Sea, Meg Estapa, D. A. Siegel, K O. Buesseler, R. H. R. Stanley, M. W. Lomas, N. B. Nelson Jan 2015

Decoupling Of Net Community Production And Export Production At Submesoscale Fronts In The Sargasso Sea, Meg Estapa, D. A. Siegel, K O. Buesseler, R. H. R. Stanley, M. W. Lomas, N. B. Nelson

Geosciences

Determinations of the net community production (NCP) in the upper ocean and the particle export production (EP) should balance over long time and large spatial scales. However, recent modeling studies suggest that a horizontal decoupling of flux-regulating processes on submesoscales (≤10 km) could lead to imbalances between individual determinations of NCP and EP. Here we sampled mixed-layer biogeochemical parameters and proxies for NCP and EP during 10, high-spatial resolution (~2 km) surface transects across strong physical gradients in the Sargasso Sea. We observed strong biogeochemical and carbon flux variability in nearly all transects. Spatial coherence among measured biogeochemical parameters within …

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Building An Ncaa Men’S Basketball Predictive Model And Quantifying Its Success, Michael J. Lopez, Gregory Matthews Jan 2015

Building An Ncaa Men’S Basketball Predictive Model And Quantifying Its Success, Michael J. Lopez, Gregory Matthews

Mathematics

Computing and machine learning advancements have led to the creation of many cutting-edge predictive algorithms, some of which have been demonstrated to provide more accurate forecasts than traditional statistical tools. In this manuscript, we provide evidence that the combination of modest statistical methods with informative data can meet or exceed the accuracy of more complex models when it comes to predicting the NCAA men's basketball tournament. First, we describe a prediction model that merges the point spreads set by Las Vegas sportsbooks with possession based team efficiency metrics by using logistic regressions. The set of probabilities generated from this model …

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Consistency, Accuracy, And Fairness: A Study Of Discretionary Penalties In The Nfl, Kevin Snyder, Michael J. Lopez Jan 2015

Consistency, Accuracy, And Fairness: A Study Of Discretionary Penalties In The Nfl, Kevin Snyder, Michael J. Lopez

Mathematics

Prior studies of referee behavior focus on identifying a bias in when certain calls are made [Kovash, Kenneth, & Levitt, Steven (2009). "Professionals do not play minimax: evidence from Major League Baseball and the National Football League (No. w15347)." National Bureau of Economic Research; Rosen, Peter A. and Rick L. Wilson. 2007. "An Analysis of the Defense First Strategy in College Football Overtime Games." Journal of Quantitative Analysis in Sports 3(2):1-17; Alamar, Benjamin. 2010. "Measuring Risk in NFL Playcalling." Journal of Quantitative Analysis in Sports 6:11.]. We extend this research by evaluating the consistency of specific discretionary penalties in professional …

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Photochemistry Of Nitrate Chemisorbed On Various Metal Oxide Surfaces, Daniel Lesko, Ellen M. Coddens, Hannah Swomley, Rachel M. Welch, Jaya Borgatta, Juan Navea Jan 2015

Photochemistry Of Nitrate Chemisorbed On Various Metal Oxide Surfaces, Daniel Lesko, Ellen M. Coddens, Hannah Swomley, Rachel M. Welch, Jaya Borgatta, Juan Navea

Chemistry

Atmospheric aerosols are known to provide an important surface for gas–solid interfaces that can lead to heterogeneous reactions impacting tropospheric chemistry. In this work, α-Fe2O3, TiO2, γ-Al2O3, SiO2 and ZnO, common components of atmospheric aerosols, served as models to investigate the gas–solid interface of nitric acid with aerosols in the presence of simulated solar radiation. Adsorbed nitrate and gaseous products can be continuously monitored with infrared spectroscopy (IR). Kinetic studies of adsorbed species were carried out using attenuated total reflectance infrared spectroscopy (ATR-FTIR). Ex situ simultaneous infrared spectroscopy of gas-phase products using a 2 m long path cell allowed the …

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Search For Vector-Like T Quarks Decaying To Top Quarks And Higgs Bosons In The All-Hadronic Channel Using Jet Substructure, Vardan Khachatryan, Marc M. Baarmand, Marcus Hohlmann, H. Kalakhety, Francisco X. Yumiceva, The Cms Collaboration Jan 2015

Search For Vector-Like T Quarks Decaying To Top Quarks And Higgs Bosons In The All-Hadronic Channel Using Jet Substructure, Vardan Khachatryan, Marc M. Baarmand, Marcus Hohlmann, H. Kalakhety, Francisco X. Yumiceva, The Cms Collaboration

Aerospace, Physics, and Space Science Faculty Publications

A search is performed for a vector-like heavy T quark that is produced in pairs and that decays to a top quark and a Higgs boson. The data analyzed correspond to an integrated luminosity of 19.7 fb−1 collected with the CMS detector in proton-proton collisions at √s= 8 TeV. For T quarks with large mass values the top quarks and Higgs bosons can have significant Lorentz boosts, so that their individual decay products often overlap and merge. Methods are applied to resolve the substructure of such merged jets. Upper limits on the production cross section of a T quark with …

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Mechanism Of Organization Increase In Complex Systems, Georgi Georgiev, Kaitlin Henry, Timothy Bates, Erin Gombos, Alexander Casey, Michael Daly, Amrit Vinod, Hyunseung Lee Jan 2015

Mechanism Of Organization Increase In Complex Systems, Georgi Georgiev, Kaitlin Henry, Timothy Bates, Erin Gombos, Alexander Casey, Michael Daly, Amrit Vinod, Hyunseung Lee

Biological and Physical Sciences Department Faculty Works

This paper proposes a variational approach to describe the evolution of organization of complex systems from first principles, as increased efficiency of physical action. Most simply stated, physical action is the product of the energy and time necessary for motion. When complex systems are modeled as flow networks, this efficiency is defined as a decrease of action for one element to cross between two nodes, or endpoints of motion - a principle of least unit action. We find a connection with another principle that of most total action, or a tendency for increase of the total action of a system. …

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An Extended Detailed Investigation Of First And Second Order Supersymmetries For Off-Shell N=2 And N=4 Supermultiplets, Sylvester James Gates, Jr., James Parker, Vincent G. J. Rodgers, Leo Rodriguez, Kory Stiffler Jan 2015

An Extended Detailed Investigation Of First And Second Order Supersymmetries For Off-Shell N=2 And N=4 Supermultiplets, Sylvester James Gates, Jr., James Parker, Vincent G. J. Rodgers, Leo Rodriguez, Kory Stiffler

Biological and Physical Sciences Department Faculty Works

This paper investigates the d = 4, N = 4 Abelian, global Super-Yang Mills system (SUSY-YM). It is shown how the N = 2 Fayet Hypermultiplet (FH) and N = 2 vector multiplet (VM) are embedded within. The central charges and internal symmetries provide a plethora of information as to further symmetries of the Lagrangian. Several of these symmetries are calculated to second order. It is hoped that investigations such as these may yield avenues to help solve the auxiliary field closure problem for d = 4, N = 4, SUSY-YM and the d = 4, N = 2 Fayet-Hypermultiplet, …

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Studies Of Electrical And Thermal Conductivities Of Sheared Multi-Walled Carbon Nanotube With Isotactic Polypropylene Polymer Composites, Parvathalu Kalakonda, Yanial Cabrera, Robert Judith, Georgi Yordanov Georgiev, Peggy Cebe, Germano S. Iannacchione Jan 2015

Studies Of Electrical And Thermal Conductivities Of Sheared Multi-Walled Carbon Nanotube With Isotactic Polypropylene Polymer Composites, Parvathalu Kalakonda, Yanial Cabrera, Robert Judith, Georgi Yordanov Georgiev, Peggy Cebe, Germano S. Iannacchione

Biological and Physical Sciences Department Faculty Works

Polymer nanocomposite materials of higher thermal and electrical transport properties are important to nanotechnology applications such as thermal management, packaging, labelling and the textile industry. In this work, thermal and electrical conductivities in nanocomposites of multiwalled carbon nanotubes (MWCNT) and isotactic polypropylene (iPP) are investigated in terms of MWCNT loading, temperature dependence, and anisotropy caused by melt shearing. IPP/MWCNT nanocomposites show a significant increase in thermal and electrical conductivity with increasing MWCNT loading, reaching 17.5 W/m K and 10−6 S/m, respectively, at a MWCNT 5.0 weight percentage at 40°C. The increase in MWCNT/iPP is more than would be expected …

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Developing And Verifying A Set Of Principles For The Cyber Security Of The Critical Infrastructures Of Turkey, Bilge Karabacak Jan 2015

Developing And Verifying A Set Of Principles For The Cyber Security Of The Critical Infrastructures Of Turkey, Bilge Karabacak

All Faculty and Staff Scholarship

Critical infrastructures are vital assets for countries as a harm given to critical infrastructures may affect public order, economic welfare and/or national security. Today, cyber systems are extensively used to control and monitor critical infrastructures. Therefore, cyber threats have the potential to adversely affect the order of societies and countries. In this PhD study, the root causes of the susceptibility of the critical infrastructures of Turkey to the cyber threats are identified by analyzing the qualitative data with the grounded theory method. The extracted root causes are verified by two experts. The set of principles for the cyber security of …

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A Laurentian Margin Back-Arc: The Ordovician Wedowee-Emuckfaw-Dahlonega Basin, Clinton Barineau Jan 2015

A Laurentian Margin Back-Arc: The Ordovician Wedowee-Emuckfaw-Dahlonega Basin, Clinton Barineau

Faculty Bibliography

Independent researchers working in the Talladega belt, Ashland-WedoweeEmuckfaw belt, and Opelika Complex of Alabama, as well as the Dahlonega gold belt and western Inner Piedmont of Alabama, Georgia, and the Carolinas, have mapped stratigraphic sequences unique to each region. Although historically considered distinct terranes of disparate origin, a synthesis of data suggests that each includes lithologic units that formed in an Ordovician back-arc basin (Wedowee-EmuckfawDahlonega basin—WEDB). Rocks in these terranes include varying proportions of metamorphosed mafi c and bimodal volcanic rock suites interlayered with deep-water metasedimentary rock sequences. Metavolcanic rocks yield ages that are Early– Middle Ordovician (480–460 Ma) and …

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