Lanier Technical College

Historians and other researchers have begun to recognize over the last half century or so that the papers of United States senators and representatives are a treasure of information on many aspects of American life and on America's position on the world stage. These collections contain valuable data on cross-sections of the human experience, shedding light at once on political, social, familial, economic, governmental (all levels), scientific, military, racial and ethnic, environmental, and recreational developments and/or individuals involved in those various areas. Archivists face an enormous challenge in preserving and processing these collections, and making guides available that reflect the many nuances unique to each collection.

Our work has focused on how to create a learning experience that is highly personally motivating for students, has a low barrier of entry for creation an artistic computational artifact, and is scalable for use in formal and informal education settings at the national level. We have created a learning environment called EarSketch that addresses student engagement through a STEAM learning experience that provides authentic learning in both the technical (i.e. computing) and artistic domains (i.e. music remixing). EarSketch is an integrated curriculum, software toolset, audio loop library, and social sharing site that teaches computing principles through digital music composition and remixing. Attendees will use Python to place audio clips, create rhythms, and add and control effects to a multi-track digital audio workstation (DAW) while learning computing concepts such as variables, iteration, conditionals, strings, lists, and functions. Participants write code to make music, with a focus on popular genres such as hip hop. The agenda outlines the pedagogy of connecting musical expression to computation. EarSketch has been used in introductory computing summer camps, secondary school classes, and is currently working towards integration with CS Principles pilot programs. All participants will need a laptop for running the EarSketch software. EarSketch will run on OSX and Windows laptops. Participants will also need headphones for listening to projects created using EarSketch. It is highly suggested that participants download the EarSketch installer at http://earsketch.gatech.edu/downloads and install the software prior to the workshop.

Understanding the evolution of the chemical environment and potential inside a disbonded region is essential to a quantitative risk assessment of corrosion and stress corrosion cracking of pipelines. A general reactive transport model is presented in this paper that enables calculation of the time evolution of chemistry and potential under disbonded coating exposed to a variety of solutions under an applied potential. Model predictions are compared to a number of experimental observations reported in the literature. It is shown that the predicted pH and potential gradients in the disbonded region are the results of competing anodic dissolution and cathodic reactions. The pH and potential gradients are influenced by exposure time, applied potential, solution conductivity, and crevice geometry. The presence of carbon dioxide (CO2) results in a lower pH at short time periods, but after a few thousand hours, the pH is determined by the cathodic potential. Further improvements to the model are identified.

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